When I saw how dense the European Covid Green Pass QR code is, I got immediately curious: "WOW, there must be a lot of interesting data in here". So, I started to dig deeper and I found that there's really a great wealth of interesting encoding and verification technologies being used in it! In this talk, I will share what I learned! We will go on a journey where we will explore Base54 encoding, COSE tokens, CBOR serialization, elliptic curve crypto, and much more! Finally, I will also show you how to write a decoder for Green Pass certificates in the most hyped language ever: Rust!

1. A look inside the
European Covid Green Certificate
Luciano Mammino ( )
@loige
2021-12-01
loige.link/green
1

2. Get these slides!
loige
loige.link/green
2

3. Let me introduce myself first...
3

4. Let me introduce myself first...
👋I'm Luciano ( 🍕🍝 )
3

5. Let me introduce myself first...
👋I'm Luciano ( 🍕🍝 )
Senior Architect @ fourTheorem (Dublin )
3

6. Let me introduce myself first...
👋I'm Luciano ( 🍕🍝 )
Senior Architect @ fourTheorem (Dublin )
nodejsdp.link
📔Co-Author of Node.js Design Patterns 👉
3

7. Let me introduce myself first...
👋I'm Luciano ( 🍕🍝 )
Senior Architect @ fourTheorem (Dublin )
nodejsdp.link
📔Co-Author of Node.js Design Patterns 👉
Let's connect!
(blog)
(twitter)
(twitch)
(github)
loige.co
@loige
loige
lmammino
3

8. We are business focused technologists that
deliver.
| |
Accelerated Serverless AI as a Service Platform Modernisation
We are hiring: do you want to ?
work with us
loige 4

9. Disclaimers
loige 5

10. Disclaimers
loige
🤓I am not involved with the DGC working group
5

11. Disclaimers
loige
🤓I am not involved with the DGC working group
😢COVID has been tough on everyone,
we'll try to focus only on the tech here!
5

12. Agenda + Goals
loige 6

13. Agenda + Goals
loige
1. Needs and principles
2. 🗝Cryptographic model
3. 📦The data
4. 🧅Layers of encoding
5. 🛠Decoding in Rust
6

14. Agenda + Goals
loige
1. Needs and principles
2. 🗝Cryptographic model
3. 📦The data
4. 🧅Layers of encoding
5. 🛠Decoding in Rust
🤨Learn some cool technologies
🧐Learn a tiny bit of Rust
🤓Be nerdy and have fun!
6

15. The need for a digital certificate in
the COVID age
loige 7

16. The need for a digital certificate in
the COVID age
loige 8

17. The need for a digital certificate in
the COVID age
loige
😷We need a system to quickly provide a proof against COVID
(Vaccination, negative test, proof of recovery)
8

18. The need for a digital certificate in
the COVID age
loige
😷We need a system to quickly provide a proof against COVID
(Vaccination, negative test, proof of recovery)
It needs to be personal, easy to carry around (digital),
easy to issue and to validate
8

19. The need for a digital certificate in
the COVID age
loige
😷We need a system to quickly provide a proof against COVID
(Vaccination, negative test, proof of recovery)
It needs to be personal, easy to carry around (digital),
easy to issue and to validate
🌎It needs to be secure against forgery and work across countries
8

20. The EU Covid Green Pass
a.k.a.
Electronic Health Certificates
(HCERT)
loige.link/hcert-spec
loige 9

21. Electronic Health Certificates (HCERT)
Requirements & Guiding Principles
loige 10

22. Electronic Health Certificates (HCERT)
Requirements & Guiding Principles
loige
✍Signed data with machine readable content
10

23. Electronic Health Certificates (HCERT)
Requirements & Guiding Principles
loige
✍Signed data with machine readable content
📃Use compact encoding
10

24. Electronic Health Certificates (HCERT)
Requirements & Guiding Principles
loige
✍Signed data with machine readable content
📃Use compact encoding
🤲Based on open standards
10

25. Asymmetric cryptographic signatures
loige 11

26. Asymmetric cryptographic signatures
loige
🤫Private Key
101010101000101010010...
11

27. Asymmetric cryptographic signatures
loige
🤫Private Key 📢Public Key
101010101000101010010... 0101010101010101010101...
11

28. Asymmetric cryptographic signatures
loige
🤫Private Key 📢Public Key
🔗
101010101000101010010... 0101010101010101010101...
11

29. Asymmetric cryptographic signatures
loige
🤫Private Key 📢Public Key
101010101000101010010... 0101010101010101010101...
12

30. Asymmetric cryptographic signatures
loige
🤫Private Key 📢Public Key
101010101000101010010... 0101010101010101010101...
12

31. Asymmetric cryptographic signatures
loige
🤫Private Key 📢Public Key
101010101000101010010... 0101010101010101010101...
The owner of the private
key signs the document
12

32. Asymmetric cryptographic signatures
loige
🤫Private Key 📢Public Key
101010101000101010010... 0101010101010101010101...
The owner of the private
key signs the document
12

33. Asymmetric cryptographic signatures
loige
🤫Private Key 📢Public Key
101010101000101010010... 0101010101010101010101...
The owner of the private
key signs the document
Anyone can validate the
signature using the public
key
12

34. Asymmetric cryptographic signatures
loige
🤫Private Key 📢Public Key
101010101000101010010... 0101010101010101010101...
The owner of the private
key signs the document
Anyone can validate the
signature using the public
key
12

35. What's inside a certificate?
loige 13

36. What's inside a certificate?
loige 13

37. What's inside a certificate?
loige
Cryptographic header (Key Id, Algorithm)
13

38. What's inside a certificate?
loige
DGC container
Cryptographic header (Key Id, Algorithm)
13

39. What's inside a certificate?
loige
DGC container
Cryptographic header (Key Id, Algorithm)
Cryptographic Signature
13

40. What's inside a certificate?
loige
DGC container
Cryptographic header (Key Id, Algorithm)
Cryptographic Signature
Header (Issuer, Issue date, expiry date)
13

41. What's inside a certificate?
loige
DGC container
Cryptographic header (Key Id, Algorithm)
Cryptographic Signature
Header (Issuer, Issue date, expiry date)
13
Certificates list
Personal data (name, surname, DoB)

42. What's inside a certificate?
loige
DGC container
Cryptographic header (Key Id, Algorithm)
Cryptographic Signature
Header (Issuer, Issue date, expiry date)
13
Certificates list
vaccine, test, or recovery data
Personal data (name, surname, DoB)

43. An example
loige loige.link/green-examples 14

44. An example
loige loige.link/green-examples 15

45. {
"1": "DK",
"4": 1625054000,
"6": 1622462000,
"-260": {
"ver":"1.0.0",
"nam":{
"fn":"Klaus",
"fnt":"KLAUS",
"gn":"Jørgensen",
"gnt":"JOERGENSEN"
},
"dob":"1983-01-06",
"v":[
{
"tg":"840539006",
"vp":"1119349007",
"mp":"EU/1/20/1528",
"ma":"ORG-100030215",
"dn":2,
"sd":2,
"dt":"2021-05-03",
"co":"DK",
"is":"Danish Health Data Authority",
"ci":"URN:UVCI:01:DK:B986830007345F99AE898FB82C6C61F2#A"
}
]
}
}
An example
loige loige.link/green-examples 15

46. {
"1": "DK",
"4": 1625054000,
"6": 1622462000,
"-260": {
"ver":"1.0.0",
"nam":{
"fn":"Klaus",
"fnt":"KLAUS",
"gn":"Jørgensen",
"gnt":"JOERGENSEN"
},
"dob":"1983-01-06",
"v":[
{
"tg":"840539006",
"vp":"1119349007",
"mp":"EU/1/20/1528",
"ma":"ORG-100030215",
"dn":2,
"sd":2,
"dt":"2021-05-03",
"co":"DK",
"is":"Danish Health Data Authority",
"ci":"URN:UVCI:01:DK:B986830007345F99AE898FB82C6C61F2#A"
}
]
}
}
An example
loige loige.link/green-examples
DGC Header
15

47. {
"1": "DK",
"4": 1625054000,
"6": 1622462000,
"-260": {
"ver":"1.0.0",
"nam":{
"fn":"Klaus",
"fnt":"KLAUS",
"gn":"Jørgensen",
"gnt":"JOERGENSEN"
},
"dob":"1983-01-06",
"v":[
{
"tg":"840539006",
"vp":"1119349007",
"mp":"EU/1/20/1528",
"ma":"ORG-100030215",
"dn":2,
"sd":2,
"dt":"2021-05-03",
"co":"DK",
"is":"Danish Health Data Authority",
"ci":"URN:UVCI:01:DK:B986830007345F99AE898FB82C6C61F2#A"
}
]
}
}
An example
loige loige.link/green-examples
Personal info
DGC Header
15

48. {
"1": "DK",
"4": 1625054000,
"6": 1622462000,
"-260": {
"ver":"1.0.0",
"nam":{
"fn":"Klaus",
"fnt":"KLAUS",
"gn":"Jørgensen",
"gnt":"JOERGENSEN"
},
"dob":"1983-01-06",
"v":[
{
"tg":"840539006",
"vp":"1119349007",
"mp":"EU/1/20/1528",
"ma":"ORG-100030215",
"dn":2,
"sd":2,
"dt":"2021-05-03",
"co":"DK",
"is":"Danish Health Data Authority",
"ci":"URN:UVCI:01:DK:B986830007345F99AE898FB82C6C61F2#A"
}
]
}
}
An example
loige loige.link/green-examples
Personal info
Vaccine info
DGC Header
15

49. Layered
encoding
loige 16
🧅

50. Layered
encoding
loige
QRCODE ASCII mode
16
🧅

51. Layered
encoding
loige
QRCODE ASCII mode
Prefix + Base45 encoding
16
🧅

52. Layered
encoding
loige
QRCODE ASCII mode
Prefix + Base45 encoding
Zlib compression
16
🧅

53. Layered
encoding
loige
QRCODE ASCII mode
Prefix + Base45 encoding
Zlib compression
CWT signed data (COSE)
16
🧅

54. Layered
encoding
loige
QRCODE ASCII mode
Prefix + Base45 encoding
Zlib compression
CWT signed data (COSE)
CBOR document
16
🧅

55. loige
QRCode content
17

56. loige
HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-36
5KN-TMLV4.P7*ZOP-IMJTI94F/8X*G3M9JUPY0BZW4Z
*AK.GNNVR*G0C7PHBO335KN/NBEDBVBJ623323EAJ7U
J5PNDIB6PNS7B1DN%BBWC7WC7GB3683ML7SZ4ZI00T9
UKPSH9WC5PF6846A$Q 76QW6A/98T5WBI$E9$UPV3Q.
GUQ$9WC5R7ACB97C968ELZ5$DP6PP5IL*PP:+P*.1D9
R8Q02-DE%QHOJ+PB/VSQOL9DLKWCZ3EBKDYGIZ J$XI
4OIMEDTJCJKDLEDL9CZTAKBI/8D:8DKTDL+SQ05.$S6
ZC0JBY63-C3F+LBQ99Q9E$BDZIA9JJ-JS7BYZJ92KG0
TB9FNDA5KD9FED.B4JB3E9B9NNPCV9E6LFSD9C8J-QD
SWNG4C-TLNKE$JDVPLW1KD0KCZGBKQCJE%RH5WAMSSR
$F-75NXONQ84QV9/7/-LT1AIYBZGD$9RCLV-PTZ-K63
ET-D1757H3GF9MV2N7WNQSY1SBZT-:81JJLHFQ-VG$H
K00XWPD2
QRCode content
17

57. loige
HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-36
5KN-TMLV4.P7*ZOP-IMJTI94F/8X*G3M9JUPY0BZW4Z
*AK.GNNVR*G0C7PHBO335KN/NBEDBVBJ623323EAJ7U
J5PNDIB6PNS7B1DN%BBWC7WC7GB3683ML7SZ4ZI00T9
UKPSH9WC5PF6846A$Q 76QW6A/98T5WBI$E9$UPV3Q.
GUQ$9WC5R7ACB97C968ELZ5$DP6PP5IL*PP:+P*.1D9
R8Q02-DE%QHOJ+PB/VSQOL9DLKWCZ3EBKDYGIZ J$XI
4OIMEDTJCJKDLEDL9CZTAKBI/8D:8DKTDL+SQ05.$S6
ZC0JBY63-C3F+LBQ99Q9E$BDZIA9JJ-JS7BYZJ92KG0
TB9FNDA5KD9FED.B4JB3E9B9NNPCV9E6LFSD9C8J-QD
SWNG4C-TLNKE$JDVPLW1KD0KCZGBKQCJE%RH5WAMSSR
$F-75NXONQ84QV9/7/-LT1AIYBZGD$9RCLV-PTZ-K63
ET-D1757H3GF9MV2N7WNQSY1SBZT-:81JJLHFQ-VG$H
K00XWPD2
QRCode content "HC1:" (prefix)
17

58. loige
HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-36
5KN-TMLV4.P7*ZOP-IMJTI94F/8X*G3M9JUPY0BZW4Z
*AK.GNNVR*G0C7PHBO335KN/NBEDBVBJ623323EAJ7U
J5PNDIB6PNS7B1DN%BBWC7WC7GB3683ML7SZ4ZI00T9
UKPSH9WC5PF6846A$Q 76QW6A/98T5WBI$E9$UPV3Q.
GUQ$9WC5R7ACB97C968ELZ5$DP6PP5IL*PP:+P*.1D9
R8Q02-DE%QHOJ+PB/VSQOL9DLKWCZ3EBKDYGIZ J$XI
4OIMEDTJCJKDLEDL9CZTAKBI/8D:8DKTDL+SQ05.$S6
ZC0JBY63-C3F+LBQ99Q9E$BDZIA9JJ-JS7BYZJ92KG0
TB9FNDA5KD9FED.B4JB3E9B9NNPCV9E6LFSD9C8J-QD
SWNG4C-TLNKE$JDVPLW1KD0KCZGBKQCJE%RH5WAMSSR
$F-75NXONQ84QV9/7/-LT1AIYBZGD$9RCLV-PTZ-K63
ET-D1757H3GF9MV2N7WNQSY1SBZT-:81JJLHFQ-VG$H
K00XWPD2
QRCode content "HC1:" (prefix)
Binary data encoded in
Base45
17

59. Base45
loige 18

60. loige
Base45
19

61. loige
Allows to encode binary data in text format (ASCII)
Base45
19

62. loige
Allows to encode binary data in text format (ASCII)
Like Base64, but it uses 45 characters instead:
Base45
19

63. loige
Allows to encode binary data in text format (ASCII)
Like Base64, but it uses 45 characters instead:
loige.link/base45-explained
Base45
19

64. Base45
loige 20

65. Base45
loige
01001001 00100000 01100111
01101111 01110100 00100000
01101101 01111001 00100000
01110011 01101000 01101111
01110100 01110011 00100000
11011000 00111101
Some binary data
20

66. Base45
loige
01001001 00100000 01100111
01101111 01110100 00100000
01101101 01111001 00100000
01110011 01101000 01101111
01110100 01110011 00100000
11011000 00111101
Some binary data
20

67. Base45
loige
01001001 00100000 01100111
01101111 01110100 00100000
01101101 01111001 00100000
01110011 01101000 01101111
01110100 01110011 00100000
11011000 00111101
UTF8 (17 bytes)
I got my shots 💉
Some binary data
20

68. Base45
loige
01001001 00100000 01100111
01101111 01110100 00100000
01101101 01111001 00100000
01110011 01101000 01101111
01110100 01110011 00100000
11011000 00111101
UTF8 (17 bytes)
I got my shots 💉
Hex (38 bytes)
49 20 67 6f 74 20 6d 79 20 73 68
6f 74 73 20 f0 9f 92 89
Some binary data
20

69. Base45
loige
01001001 00100000 01100111
01101111 01110100 00100000
01101101 01111001 00100000
01110011 01101000 01101111
01110100 01110011 00100000
11011000 00111101
UTF8 (17 bytes)
I got my shots 💉
Hex (38 bytes)
49 20 67 6f 74 20 6d 79 20 73 68
6f 74 73 20 f0 9f 92 89
Base64 (28 bytes)
SSBnb3QgbXkgc2hvdHMg8J+SiQ==
Some binary data
20

70. Base45
loige
01001001 00100000 01100111
01101111 01110100 00100000
01101101 01111001 00100000
01110011 01101000 01101111
01110100 01110011 00100000
11011000 00111101
UTF8 (17 bytes)
I got my shots 💉
Hex (38 bytes)
49 20 67 6f 74 20 6d 79 20 73 68
6f 74 73 20 f0 9f 92 89
Base64 (28 bytes)
SSBnb3QgbXkgc2hvdHMg8J+SiQ==
Base45 (29 bytes)
0B9J3DSUEZ$DR4459DLWEH74Z7K23
Some binary data
20

71. loige
loige.link/base45-rfc
"A QR-code is used to encode text as a graphical image. [...] QR-codes
cannot be used to encode arbitrary binary data directly. [...] Compared
to already established Base64, Base32 and Base16 encoding schemes
[...], the Base45 scheme described in this document offer a more
compact QR-code encoding"
Base45
21

72. loige
Base45
22

73. loige
Base45
NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-
TMLV4.P7*ZOP-IMJTI94F/8X*G3M9JUPY0BZW4Z*AK.
GNNVR*G0C7PHBO335KN/NBEDBVBJ623323EAJ7UJ5PN
DIB6PNS7B1DN%BBWC7WC7GB3683ML7SZ4ZI00T9UKPS
H9WC5PF6846A$Q 76QW6A/98T5WBI$E9$UPV3Q.GUQ$
9WC5R7ACB97C968ELZ5$DP6PP5IL*PP:+P*.1D9R8Q0
2-DE%QHOJ+PB/VSQOL9DLKWCZ3EBKDYGIZ J$XI4OIM
EDTJCJKDLEDL9CZTAKBI/8D:8DKTDL+SQ05.$S6ZC0J
BY63-C3F+LBQ99Q9E$BDZIA9JJ-JS7BYZJ92KG0TB9F
NDA5KD9FED.B4JB3E9B9NNPCV9E6LFSD9C8J-QDSWNG
4C-TLNKE$JDVPLW1KD0KCZGBKQCJE%RH5WAMSSR$F-7
5NXONQ84QV9/7/-LT1AIYBZGD$9RCLV-PTZ-K63ET-D
1757H3GF9MV2N7WNQSY1SBZT-:81JJLHFQ-VG$HK00X
WPD2
22

74. loige
Base45
NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-
TMLV4.P7*ZOP-IMJTI94F/8X*G3M9JUPY0BZW4Z*AK.
GNNVR*G0C7PHBO335KN/NBEDBVBJ623323EAJ7UJ5PN
DIB6PNS7B1DN%BBWC7WC7GB3683ML7SZ4ZI00T9UKPS
H9WC5PF6846A$Q 76QW6A/98T5WBI$E9$UPV3Q.GUQ$
9WC5R7ACB97C968ELZ5$DP6PP5IL*PP:+P*.1D9R8Q0
2-DE%QHOJ+PB/VSQOL9DLKWCZ3EBKDYGIZ J$XI4OIM
EDTJCJKDLEDL9CZTAKBI/8D:8DKTDL+SQ05.$S6ZC0J
BY63-C3F+LBQ99Q9E$BDZIA9JJ-JS7BYZJ92KG0TB9F
NDA5KD9FED.B4JB3E9B9NNPCV9E6LFSD9C8J-QDSWNG
4C-TLNKE$JDVPLW1KD0KCZGBKQCJE%RH5WAMSSR$F-7
5NXONQ84QV9/7/-LT1AIYBZGD$9RCLV-PTZ-K63ET-D
1757H3GF9MV2N7WNQSY1SBZT-:81JJLHFQ-VG$HK00X
WPD2
Base45
Decode
22

75. loige
Base45
NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-
TMLV4.P7*ZOP-IMJTI94F/8X*G3M9JUPY0BZW4Z*AK.
GNNVR*G0C7PHBO335KN/NBEDBVBJ623323EAJ7UJ5PN
DIB6PNS7B1DN%BBWC7WC7GB3683ML7SZ4ZI00T9UKPS
H9WC5PF6846A$Q 76QW6A/98T5WBI$E9$UPV3Q.GUQ$
9WC5R7ACB97C968ELZ5$DP6PP5IL*PP:+P*.1D9R8Q0
2-DE%QHOJ+PB/VSQOL9DLKWCZ3EBKDYGIZ J$XI4OIM
EDTJCJKDLEDL9CZTAKBI/8D:8DKTDL+SQ05.$S6ZC0J
BY63-C3F+LBQ99Q9E$BDZIA9JJ-JS7BYZJ92KG0TB9F
NDA5KD9FED.B4JB3E9B9NNPCV9E6LFSD9C8J-QDSWNG
4C-TLNKE$JDVPLW1KD0KCZGBKQCJE%RH5WAMSSR$F-7
5NXONQ84QV9/7/-LT1AIYBZGD$9RCLV-PTZ-K63ET-D
1757H3GF9MV2N7WNQSY1SBZT-:81JJLHFQ-VG$HK00X
WPD2
Base45
Decode
Compressed binary data
22

76. Zlib compression
loige 23

77. Zlib compression
loige
"zlib is designed to be a free, general-purpose, legally
unencumbered -- that is, not covered by any patents -- lossless
data-compression library for use on virtually any computer
hardware and operating system"
zlib.net
24

78. Zlib compression
loige 25

79. Zlib compression
loige
Compressed binary data
25

80. Zlib compression
loige
Zlib inflate
Compressed binary data
25

81. Zlib compression
loige
Zlib inflate
Compressed binary data Decompressed binary data
25

82. Zlib compression
loige 26

83. Zlib compression
loige 26

84. Zlib compression
loige
👀We start to see
some "readable"
information!
26

85. COSE / CWT
loige
CBOR Object Signing and Encryption / CBOR Web Token
27

86. CBOR !? 🤔
loige
But wait, what the heck is
✋
28

87. CBOR
loige
TLDR; Like JSON but in binary!
loige.link/cbor-rfc
29

88. JSON
loige
A schema-less data format where a value can be:
Null
Boolean
Number
String
Array
Object
null
true
-17.34
"A programmer walks into a bar..."
["foo", 1.23, null, false, [22]]
{"foo": "bar", "manyvals": [1,2,3], "nested": {}}
30

89. CBOR
loige
A schema-less binary data format where a value can be:
Null
Boolean
Number
String Text
Array
Object Map
F6
F5
fbc031570a3d70a3d7
7820412070726f6772616d6d65722077616c6b7320696e746f2061206261722e2e2e
8563666f6ffb3ff3ae147ae147aef6f48116
a363666f6f63626172686d616e7976616c7383010203666e6573746564a0
31

90. CBOR
loige
It also supports:
Byte String (a sequence of raw bytes)
Tags (annotations that allow to create new types)
32

91. CBOR
loige
An example:
A3 63666F6F 63626172 686D616E7976616C73 83 01 02 03 666E6573746564 A0
33

92. CBOR
loige
An example:
A3 63666F6F 63626172 686D616E7976616C73 83 01 02 03 666E6573746564 A0
{
}
33

93. CBOR
loige
An example:
A3 63666F6F 63626172 686D616E7976616C73 83 01 02 03 666E6573746564 A0
{
"foo":
}
33

94. CBOR
loige
An example:
A3 63666F6F 63626172 686D616E7976616C73 83 01 02 03 666E6573746564 A0
{
"foo": "bar",
}
33

95. CBOR
loige
An example:
A3 63666F6F 63626172 686D616E7976616C73 83 01 02 03 666E6573746564 A0
{
"foo": "bar",
"manyvals":
}
33

96. CBOR
loige
An example:
A3 63666F6F 63626172 686D616E7976616C73 83 01 02 03 666E6573746564 A0
{
"foo": "bar",
"manyvals": [
}
],
33

97. CBOR
loige
An example:
A3 63666F6F 63626172 686D616E7976616C73 83 01 02 03 666E6573746564 A0
{
"foo": "bar",
"manyvals": [
}
],
1,
33

98. CBOR
loige
An example:
A3 63666F6F 63626172 686D616E7976616C73 83 01 02 03 666E6573746564 A0
{
"foo": "bar",
"manyvals": [
}
],
1, 2,
33

99. CBOR
loige
An example:
A3 63666F6F 63626172 686D616E7976616C73 83 01 02 03 666E6573746564 A0
{
"foo": "bar",
"manyvals": [
}
],
1, 2, 3
33

100. CBOR
loige
An example:
A3 63666F6F 63626172 686D616E7976616C73 83 01 02 03 666E6573746564 A0
{
"foo": "bar",
"manyvals": [
}
],
"nested":
1, 2, 3
33

101. CBOR
loige
An example:
A3 63666F6F 63626172 686D616E7976616C73 83 01 02 03 666E6573746564 A0
{
"foo": "bar",
"manyvals": [
}
],
"nested": {}
1, 2, 3
33

102. COSE / CWT
loige
CBOR Object Signing and Encryption / CBOR Web Token
ok... again 😅
34

103. COSE
loige
CBOR Object Signing and Encryption
35

104. COSE
loige
CBOR Object Signing and Encryption
COSE (inspired by ) defines CBOR-based protocols for:
JOSE
35

105. COSE
loige
CBOR Object Signing and Encryption
COSE (inspired by ) defines CBOR-based protocols for:
JOSE
Encrypted data
35

106. COSE
loige
CBOR Object Signing and Encryption
COSE (inspired by ) defines CBOR-based protocols for:
JOSE
Encrypted data
Cryptographic signed data
35

107. COSE
loige
CBOR Object Signing and Encryption
COSE (inspired by ) defines CBOR-based protocols for:
JOSE
Encrypted data
Cryptographic signed data
MACed data
35

108. COSE
loige
loige.link/cose-rfc
CBOR Object Signing and Encryption
COSE (inspired by ) defines CBOR-based protocols for:
JOSE
Encrypted data
Cryptographic signed data
MACed data
35

109. CWT
loige
CBOR Web Token
36

110. CWT
loige
Like but for CBOR
JWT
CBOR Web Token
36

111. CWT
loige
Like but for CBOR
JWT
Defines a protocol for transferring claims between parties
CBOR Web Token
36

112. CWT
loige
Like but for CBOR
JWT
Defines a protocol for transferring claims between parties
CBOR Web Token
Claims are digitally signed for authenticity
36

113. CWT
loige
Like but for CBOR
JWT
loige.link/cwt-rfc
Defines a protocol for transferring claims between parties
CBOR Web Token
Claims are digitally signed for authenticity
36

114. CWT
loige
CBOR Web Token
37

115. CWT
loige
A CWT is made of 4 parts:
CBOR Web Token
37

116. CWT
loige
A CWT is made of 4 parts:
Protected header
CBOR Web Token
37

117. CWT
loige
A CWT is made of 4 parts:
Protected header
CBOR Web Token
Non protected header
37

118. CWT
loige
A CWT is made of 4 parts:
Protected header
CBOR Web Token
Non protected header
Payload
37

119. CWT
loige
A CWT is made of 4 parts:
Protected header
CBOR Web Token
Non protected header
Payload
Signature
37

120. CWT
loige
A CWT is encoded as a (tagged) CBOR array with 4 values:
Protected header (binary string)
CBOR Web Token
Non protected header (map)
Payload (binary string)
Signature (binary string)
38

121. loige 39

122. loige 39

123. loige
CWT tag
39

124. loige
CWT tag
39

125. loige
Array (length 4)
CWT tag
39

126. loige
Array (length 4)
CWT tag
39

127. Protected
header
Binary String
loige
Array (length 4)
CWT tag
39

128. Protected
header
Binary String
loige
Array (length 4)
CWT tag
39

129. Protected
header
Binary String
loige
Array (length 4)
CWT tag
39
Unprotected header
Map (length 0)

130. Protected
header
Binary String
loige
Array (length 4)
CWT tag
39
Unprotected header
Map (length 0)

131. Protected
header
Binary String
loige
Array (length 4)
CWT tag
39
Unprotected header
Map (length 0)
Payload
Binary String

132. Protected
header
Binary String
loige
Array (length 4)
CWT tag
39
Unprotected header
Map (length 0)
Payload
Binary String

133. Protected
header
Binary String
loige
Array (length 4)
CWT tag
39
Unprotected header
Map (length 0)
Payload
Binary String
Signature
Binary String

134. loige
CWT payload
40

135. loige
CWT payload
40

136. loige
CWT payload
Binary String follows (CBOR Encoded)
40

137. loige
CWT payload
{
"1": "DK",
"4": 1625054000,
"6": 1622462000,
"-260": {
"ver":"1.0.0",
"nam":{
"fn":"Klaus",
"fnt":"KLAUS",
"gn":"Jørgensen",
"gnt":"JOERGENSEN"
},
"dob":"1983-01-06",
"v":[
{
"tg":"840539006",
"vp":"1119349007",
"mp":"EU/1/20/1528",
"ma":"ORG-100030215",
"dn":2,
"sd":2,
"dt":"2021-05-03",
"co":"DK",
"is":"Danish Health Data Authority",
"ci":"URN:UVCI:01:DK:B986830007345F99AE898FB82C6C61F2#A"
}
]
}
}
Binary String follows (CBOR Encoded)
CBOR decode
(to JSON)
40

138. loige
CWT payload
{
"1": "DK",
"4": 1625054000,
"6": 1622462000,
"-260": {
"ver":"1.0.0",
"nam":{
"fn":"Klaus",
"fnt":"KLAUS",
"gn":"Jørgensen",
"gnt":"JOERGENSEN"
},
"dob":"1983-01-06",
"v":[
{
"tg":"840539006",
"vp":"1119349007",
"mp":"EU/1/20/1528",
"ma":"ORG-100030215",
"dn":2,
"sd":2,
"dt":"2021-05-03",
"co":"DK",
"is":"Danish Health Data Authority",
"ci":"URN:UVCI:01:DK:B986830007345F99AE898FB82C6C61F2#A"
}
]
}
}
Binary String follows (CBOR Encoded)
CBOR decode
(to JSON)
40

139. How to decode - quick recap
loige 41

140. How to decode - quick recap
loige
1. Remove "HC1:" prefix
41

141. How to decode - quick recap
loige
1. Remove "HC1:" prefix
2. Base45 decode
41

142. How to decode - quick recap
loige
1. Remove "HC1:" prefix
2. Base45 decode
3. Zlib decompress
41

143. How to decode - quick recap
loige
1. Remove "HC1:" prefix
2. Base45 decode
3. Zlib decompress
4. Parse CWT
41

144. How to decode - quick recap
loige
1. Remove "HC1:" prefix
2. Base45 decode
3. Zlib decompress
4. Parse CWT
5. Parse CWT Payload as CBOR
41

145. How to decode - quick recap
loige
1. Remove "HC1:" prefix
2. Base45 decode
3. Zlib decompress
4. Parse CWT
5. Parse CWT Payload as CBOR
6. Party hard! 🥳
41

146. How to decode - quick recap
loige
1. Remove "HC1:" prefix
2. Base45 decode
3. Zlib decompress
4. Parse CWT
5. Parse CWT Payload as CBOR
6. Party hard! 🥳
41

147. How to decode - quick recap
loige
1. Remove "HC1:" prefix
2. Base45 decode
3. Zlib decompress
4. Parse CWT
5. Parse CWT Payload as CBOR
6. Party hard! 🥳
Hey, let's implement this...
41

148. How to decode - quick recap
loige
1. Remove "HC1:" prefix
2. Base45 decode
3. Zlib decompress
4. Parse CWT
5. Parse CWT Payload as CBOR
6. Party hard! 🥳
Hey, let's implement this... in Rust!
41

149. loige
cargo new dgc-decode
Project bootstrap
42

150. // src/main.rs
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
todo!()
// 1. Remove "HC1:" prefix
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
1
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9
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11
loige 43

151. // src/main.rs
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
todo!()
// 1. Remove "HC1:" prefix
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
1
2
3
4
5
6
7
8
9
10
11
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
// src/main.rs
1
2
fn main() {
3
4
todo!()
5
// 1. Remove "HC1:" prefix
6
// 2. Base45 decode
7
// 3. Zlib decompress
8
// 4. Parse CWT
9
// 5. Parse CWT Payload as CBOR
10
}
11
loige 43

152. // src/main.rs
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
todo!()
// 1. Remove "HC1:" prefix
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
1
2
3
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5
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11
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
// src/main.rs
1
2
fn main() {
3
4
todo!()
5
// 1. Remove "HC1:" prefix
6
// 2. Base45 decode
7
// 3. Zlib decompress
8
// 4. Parse CWT
9
// 5. Parse CWT Payload as CBOR
10
}
11
todo!()
// 1. Remove "HC1:" prefix
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
// src/main.rs
1
2
fn main() {
3
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
4
5
6
7
8
9
10
}
11
loige 43

153. // src/main.rs
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
todo!()
// 1. Remove "HC1:" prefix
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
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3
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11
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
// src/main.rs
1
2
fn main() {
3
4
todo!()
5
// 1. Remove "HC1:" prefix
6
// 2. Base45 decode
7
// 3. Zlib decompress
8
// 4. Parse CWT
9
// 5. Parse CWT Payload as CBOR
10
}
11
todo!()
// 1. Remove "HC1:" prefix
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
// src/main.rs
1
2
fn main() {
3
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
4
5
6
7
8
9
10
}
11
// src/main.rs
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
todo!()
// 1. Remove "HC1:" prefix
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
1
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3
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loige 43

154. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
todo!();
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn remove_prefix(data: &str) -> &str {
todo!()
// remove "HC1:" prefix and return remaining string
}
1
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14
loige 44

155. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
todo!();
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn remove_prefix(data: &str) -> &str {
todo!()
// remove "HC1:" prefix and return remaining string
}
1
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3
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13
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let no_prefix = remove_prefix(cert_data);
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
3
todo!();
4
// 2. Base45 decode
5
// 3. Zlib decompress
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn remove_prefix(data: &str) -> &str {
11
todo!()
12
// remove "HC1:" prefix and return remaining string
13
}
14
loige 44

156. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
todo!();
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn remove_prefix(data: &str) -> &str {
todo!()
// remove "HC1:" prefix and return remaining string
}
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let no_prefix = remove_prefix(cert_data);
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
3
todo!();
4
// 2. Base45 decode
5
// 3. Zlib decompress
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn remove_prefix(data: &str) -> &str {
11
todo!()
12
// remove "HC1:" prefix and return remaining string
13
}
14
fn remove_prefix(data: &str) -> &str {
todo!()
// remove "HC1:" prefix and return remaining string
}
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
todo!();
4
// 2. Base45 decode
5
// 3. Zlib decompress
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
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11
12
13
14
loige 44

157. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
todo!();
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn remove_prefix(data: &str) -> &str {
todo!()
// remove "HC1:" prefix and return remaining string
}
1
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3
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let no_prefix = remove_prefix(cert_data);
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
3
todo!();
4
// 2. Base45 decode
5
// 3. Zlib decompress
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn remove_prefix(data: &str) -> &str {
11
todo!()
12
// remove "HC1:" prefix and return remaining string
13
}
14
fn remove_prefix(data: &str) -> &str {
todo!()
// remove "HC1:" prefix and return remaining string
}
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
todo!();
4
// 2. Base45 decode
5
// 3. Zlib decompress
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
11
12
13
14
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
todo!();
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn remove_prefix(data: &str) -> &str {
todo!()
// remove "HC1:" prefix and return remaining string
}
1
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loige 44

158. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
todo!();
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn remove_prefix(data: &str) -> &str {
if data.len() < 4 || !data.starts_with("HC1:") {
panic!("Invalid prefix"); // IRL use a Result!
}
&data[4..]
}
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loige 45

159. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
todo!();
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn remove_prefix(data: &str) -> &str {
if data.len() < 4 || !data.starts_with("HC1:") {
panic!("Invalid prefix"); // IRL use a Result!
}
&data[4..]
}
1
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17
if data.len() < 4 || !data.starts_with("HC1:") {
panic!("Invalid prefix"); // IRL use a Result!
}
&data[4..]
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
todo!();
4
// 2. Base45 decode
5
// 3. Zlib decompress
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn remove_prefix(data: &str) -> &str {
11
12
13
14
15
16
}
17
loige 45

160. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
todo!();
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn remove_prefix(data: &str) -> &str {
if data.len() < 4 || !data.starts_with("HC1:") {
panic!("Invalid prefix"); // IRL use a Result!
}
&data[4..]
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
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16
17
if data.len() < 4 || !data.starts_with("HC1:") {
panic!("Invalid prefix"); // IRL use a Result!
}
&data[4..]
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
todo!();
4
// 2. Base45 decode
5
// 3. Zlib decompress
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn remove_prefix(data: &str) -> &str {
11
12
13
14
15
16
}
17
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
todo!();
// 2. Base45 decode
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn remove_prefix(data: &str) -> &str {
if data.len() < 4 || !data.starts_with("HC1:") {
panic!("Invalid prefix"); // IRL use a Result!
}
&data[4..]
}
1
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loige 45

161. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
todo!()
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decode_base45(data: &str) -> Vec<u8> {
todo!()
// parse the string as base45 encoded and return the
// resulting raw bytes
}
// ...
1
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loige 46

162. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
todo!()
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decode_base45(data: &str) -> Vec<u8> {
todo!()
// parse the string as base45 encoded and return the
// resulting raw bytes
}
// ...
1
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5
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7
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13
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17
let decoded = decode_base45(no_prefix);
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
4
todo!()
5
// 3. Zlib decompress
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn decode_base45(data: &str) -> Vec<u8> {
11
todo!()
12
// parse the string as base45 encoded and return the
13
// resulting raw bytes
14
}
15
16
// ...
17
loige 46

163. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
todo!()
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decode_base45(data: &str) -> Vec<u8> {
todo!()
// parse the string as base45 encoded and return the
// resulting raw bytes
}
// ...
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3
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5
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7
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13
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17
let decoded = decode_base45(no_prefix);
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
4
todo!()
5
// 3. Zlib decompress
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn decode_base45(data: &str) -> Vec<u8> {
11
todo!()
12
// parse the string as base45 encoded and return the
13
// resulting raw bytes
14
}
15
16
// ...
17
fn decode_base45(data: &str) -> Vec<u8> {
todo!()
// parse the string as base45 encoded and return the
// resulting raw bytes
}
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
todo!()
5
// 3. Zlib decompress
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
11
12
13
14
15
16
// ...
17
loige 46

164. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
todo!()
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decode_base45(data: &str) -> Vec<u8> {
todo!()
// parse the string as base45 encoded and return the
// resulting raw bytes
}
// ...
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5
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7
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13
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17
let decoded = decode_base45(no_prefix);
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
4
todo!()
5
// 3. Zlib decompress
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn decode_base45(data: &str) -> Vec<u8> {
11
todo!()
12
// parse the string as base45 encoded and return the
13
// resulting raw bytes
14
}
15
16
// ...
17
fn decode_base45(data: &str) -> Vec<u8> {
todo!()
// parse the string as base45 encoded and return the
// resulting raw bytes
}
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
todo!()
5
// 3. Zlib decompress
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
11
12
13
14
15
16
// ...
17
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
todo!()
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decode_base45(data: &str) -> Vec<u8> {
todo!()
// parse the string as base45 encoded and return the
// resulting raw bytes
}
// ...
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loige 46

165. loige
cargo add base45
47

166. loige
cargo add base45
# Cargo.toml
# ...
[dependencies]
base45 = "3.0.0"
47

167. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
todo!()
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decode_base45(data: &str) -> Vec<u8> {
base45::decode(data).unwrap() // IRL use a Result!
}
// ...
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5
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loige 48

168. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
todo!()
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decode_base45(data: &str) -> Vec<u8> {
base45::decode(data).unwrap() // IRL use a Result!
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
base45::decode(data).unwrap() // IRL use a Result!
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
todo!()
5
// 3. Zlib decompress
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn decode_base45(data: &str) -> Vec<u8> {
11
12
}
13
14
// ...
15
loige 48

169. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
todo!()
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decode_base45(data: &str) -> Vec<u8> {
base45::decode(data).unwrap() // IRL use a Result!
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
base45::decode(data).unwrap() // IRL use a Result!
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
todo!()
5
// 3. Zlib decompress
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn decode_base45(data: &str) -> Vec<u8> {
11
12
}
13
14
// ...
15
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
todo!()
// 3. Zlib decompress
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decode_base45(data: &str) -> Vec<u8> {
base45::decode(data).unwrap() // IRL use a Result!
}
// ...
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loige 48

170. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
todo!()
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decompress(data: Vec<u8>) -> Vec<u8> {
todo!()
// decompress using zlib inflate
}
// ...
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loige 49

171. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
todo!()
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decompress(data: Vec<u8>) -> Vec<u8> {
todo!()
// decompress using zlib inflate
}
// ...
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5
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7
8
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11
12
13
14
15
16
let decompressed = decompress(decoded);
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
5
todo!()
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn decompress(data: Vec<u8>) -> Vec<u8> {
11
todo!()
12
// decompress using zlib inflate
13
}
14
15
// ...
16
loige 49

172. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
todo!()
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decompress(data: Vec<u8>) -> Vec<u8> {
todo!()
// decompress using zlib inflate
}
// ...
1
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5
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7
8
9
10
11
12
13
14
15
16
let decompressed = decompress(decoded);
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
5
todo!()
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn decompress(data: Vec<u8>) -> Vec<u8> {
11
todo!()
12
// decompress using zlib inflate
13
}
14
15
// ...
16
fn decompress(data: Vec<u8>) -> Vec<u8> {
todo!()
// decompress using zlib inflate
}
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
let decompressed = decompress(decoded);
5
todo!()
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
11
12
13
14
15
// ...
16
loige 49

173. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
todo!()
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decompress(data: Vec<u8>) -> Vec<u8> {
todo!()
// decompress using zlib inflate
}
// ...
1
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3
4
5
6
7
8
9
10
11
12
13
14
15
16
let decompressed = decompress(decoded);
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
5
todo!()
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn decompress(data: Vec<u8>) -> Vec<u8> {
11
todo!()
12
// decompress using zlib inflate
13
}
14
15
// ...
16
fn decompress(data: Vec<u8>) -> Vec<u8> {
todo!()
// decompress using zlib inflate
}
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
let decompressed = decompress(decoded);
5
todo!()
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
11
12
13
14
15
// ...
16
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
todo!()
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decompress(data: Vec<u8>) -> Vec<u8> {
todo!()
// decompress using zlib inflate
}
// ...
1
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3
4
5
6
7
8
9
10
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13
14
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loige 49

174. loige
cargo add inflate
50

175. loige
cargo add inflate
# Cargo.toml
# ...
[dependencies]
base45 = "3.0.0"
inflate = "0.4.5"
50

176. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
todo!()
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decompress(data: Vec<u8>) -> Vec<u8> {
inflate::inflate_bytes_zlib(data.as_slice()).unwrap()
// IRL use a Result!
}
// ...
1
2
3
4
5
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7
8
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11
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loige 51

177. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
todo!()
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decompress(data: Vec<u8>) -> Vec<u8> {
inflate::inflate_bytes_zlib(data.as_slice()).unwrap()
// IRL use a Result!
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
inflate::inflate_bytes_zlib(data.as_slice()).unwrap()
// IRL use a Result!
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
let decompressed = decompress(decoded);
5
todo!()
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn decompress(data: Vec<u8>) -> Vec<u8> {
11
12
13
}
14
15
// ...
16
loige 51

178. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
todo!()
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decompress(data: Vec<u8>) -> Vec<u8> {
inflate::inflate_bytes_zlib(data.as_slice()).unwrap()
// IRL use a Result!
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
inflate::inflate_bytes_zlib(data.as_slice()).unwrap()
// IRL use a Result!
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
let decompressed = decompress(decoded);
5
todo!()
6
// 4. Parse CWT
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn decompress(data: Vec<u8>) -> Vec<u8> {
11
12
13
}
14
15
// ...
16
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
todo!()
// 4. Parse CWT
// 5. Parse CWT Payload as CBOR
}
fn decompress(data: Vec<u8>) -> Vec<u8> {
inflate::inflate_bytes_zlib(data.as_slice()).unwrap()
// IRL use a Result!
}
// ...
1
2
3
4
5
6
7
8
9
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11
12
13
14
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16
loige 51

179. Are we on the right track?
loige
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
println!("{}", String::from_utf8_lossy(&decompressed));
}
// ...
1
2
3
4
5
6
7
8
9
10
52

180. Are we on the right track?
loige
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
println!("{}", String::from_utf8_lossy(&decompressed));
}
// ...
1
2
3
4
5
6
7
8
9
10
println!("{}", String::from_utf8_lossy(&decompressed));
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
let decompressed = decompress(decoded);
5
6
7
}
8
9
// ...
10
52

181. Are we on the right track?
loige 53

182. Are we on the right track?
loige
We are starting to see some
readable info! 🤩 53

183. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
todo!()
// 5. Parse CWT Payload as CBOR
}
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
todo!()
// Parse raw bytes as CBOR.
// Extract and return the raw bytes representing
// the CWT payload
}
// ...
1
2
3
4
5
6
7
8
9
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13
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17
18
loige 54

184. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
todo!()
// 5. Parse CWT Payload as CBOR
}
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
todo!()
// Parse raw bytes as CBOR.
// Extract and return the raw bytes representing
// the CWT payload
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
let cwt_payload = get_cwt_payload(decompressed);
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
let decompressed = decompress(decoded);
5
6
todo!()
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
11
todo!()
12
// Parse raw bytes as CBOR.
13
// Extract and return the raw bytes representing
14
// the CWT payload
15
}
16
17
// ...
18
loige 54

185. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
todo!()
// 5. Parse CWT Payload as CBOR
}
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
todo!()
// Parse raw bytes as CBOR.
// Extract and return the raw bytes representing
// the CWT payload
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
let cwt_payload = get_cwt_payload(decompressed);
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
let decompressed = decompress(decoded);
5
6
todo!()
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
11
todo!()
12
// Parse raw bytes as CBOR.
13
// Extract and return the raw bytes representing
14
// the CWT payload
15
}
16
17
// ...
18
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
todo!()
// Parse raw bytes as CBOR.
// Extract and return the raw bytes representing
// the CWT payload
}
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
let decompressed = decompress(decoded);
5
let cwt_payload = get_cwt_payload(decompressed);
6
todo!()
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
11
12
13
14
15
16
17
// ...
18
loige 54

186. fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
todo!()
// 5. Parse CWT Payload as CBOR
}
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
todo!()
// Parse raw bytes as CBOR.
// Extract and return the raw bytes representing
// the CWT payload
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
let cwt_payload = get_cwt_payload(decompressed);
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
let decompressed = decompress(decoded);
5
6
todo!()
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
11
todo!()
12
// Parse raw bytes as CBOR.
13
// Extract and return the raw bytes representing
14
// the CWT payload
15
}
16
17
// ...
18
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
todo!()
// Parse raw bytes as CBOR.
// Extract and return the raw bytes representing
// the CWT payload
}
fn main() {
1
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
2
let no_prefix = remove_prefix(cert_data);
3
let decoded = decode_base45(no_prefix);
4
let decompressed = decompress(decoded);
5
let cwt_payload = get_cwt_payload(decompressed);
6
todo!()
7
// 5. Parse CWT Payload as CBOR
8
}
9
10
11
12
13
14
15
16
17
// ...
18
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
todo!()
// 5. Parse CWT Payload as CBOR
}
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
todo!()
// Parse raw bytes as CBOR.
// Extract and return the raw bytes representing
// the CWT payload
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
loige 54

187. loige
cargo add ciborium
55

188. loige
cargo add ciborium
# Cargo.toml
# ...
[dependencies]
base45 = "3.0.0"
ciborium = "0.2.0"
inflate = "0.4.5"
55

189. use ciborium::{de::from_reader, value::Value};
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
todo!()
// 5. Parse CWT Payload as CBOR
}
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
let parsed: Value = from_reader(data.as_slice()).unwrap();
println!("{:?}", parsed);
todo!()
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
loige 56

190. use ciborium::{de::from_reader, value::Value};
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
todo!()
// 5. Parse CWT Payload as CBOR
}
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
let parsed: Value = from_reader(data.as_slice()).unwrap();
println!("{:?}", parsed);
todo!()
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
use ciborium::{de::from_reader, value::Value};
1
2
fn main() {
3
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
4
let no_prefix = remove_prefix(cert_data);
5
let decoded = decode_base45(no_prefix);
6
let decompressed = decompress(decoded);
7
let cwt_payload = get_cwt_payload(decompressed);
8
todo!()
9
// 5. Parse CWT Payload as CBOR
10
}
11
12
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
13
let parsed: Value = from_reader(data.as_slice()).unwrap();
14
println!("{:?}", parsed);
15
todo!()
16
}
17
18
// ...
19
loige 56

191. use ciborium::{de::from_reader, value::Value};
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
todo!()
// 5. Parse CWT Payload as CBOR
}
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
let parsed: Value = from_reader(data.as_slice()).unwrap();
println!("{:?}", parsed);
todo!()
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
use ciborium::{de::from_reader, value::Value};
1
2
fn main() {
3
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
4
let no_prefix = remove_prefix(cert_data);
5
let decoded = decode_base45(no_prefix);
6
let decompressed = decompress(decoded);
7
let cwt_payload = get_cwt_payload(decompressed);
8
todo!()
9
// 5. Parse CWT Payload as CBOR
10
}
11
12
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
13
let parsed: Value = from_reader(data.as_slice()).unwrap();
14
println!("{:?}", parsed);
15
todo!()
16
}
17
18
// ...
19
let parsed: Value = from_reader(data.as_slice()).unwrap();
println!("{:?}", parsed);
use ciborium::{de::from_reader, value::Value};
1
2
fn main() {
3
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
4
let no_prefix = remove_prefix(cert_data);
5
let decoded = decode_base45(no_prefix);
6
let decompressed = decompress(decoded);
7
let cwt_payload = get_cwt_payload(decompressed);
8
todo!()
9
// 5. Parse CWT Payload as CBOR
10
}
11
12
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
13
14
15
todo!()
16
}
17
18
// ...
19
loige 56

192. 57
loige

193. 57
loige

194. CWT Tag (18)
57
loige

195. The content is an array
57
loige

196. 57
Protected header
loige

197. 57
Non protected header
loige

198. 57
Payload ✅
loige

199. 57
Signature
loige

200. // ...
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
// IRL avoid .unwrap() like hell and propagate errors correctly!
let parsed: Value = from_reader(data.as_slice()).unwrap();
let (tag, arr) = parsed.as_tag().unwrap();
assert_eq!(tag, 18);
let arr = arr.as_array().unwrap();
let payload = arr[2].as_bytes().unwrap();
payload.clone()
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
loige 58

201. // ...
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
// IRL avoid .unwrap() like hell and propagate errors correctly!
let parsed: Value = from_reader(data.as_slice()).unwrap();
let (tag, arr) = parsed.as_tag().unwrap();
assert_eq!(tag, 18);
let arr = arr.as_array().unwrap();
let payload = arr[2].as_bytes().unwrap();
payload.clone()
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
let parsed: Value = from_reader(data.as_slice()).unwrap();
// ...
1
2
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
3
// IRL avoid .unwrap() like hell and propagate errors correctly!
4
5
let (tag, arr) = parsed.as_tag().unwrap();
6
assert_eq!(tag, 18);
7
let arr = arr.as_array().unwrap();
8
let payload = arr[2].as_bytes().unwrap();
9
payload.clone()
10
}
11
12
// ...
13
loige 58

202. // ...
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
// IRL avoid .unwrap() like hell and propagate errors correctly!
let parsed: Value = from_reader(data.as_slice()).unwrap();
let (tag, arr) = parsed.as_tag().unwrap();
assert_eq!(tag, 18);
let arr = arr.as_array().unwrap();
let payload = arr[2].as_bytes().unwrap();
payload.clone()
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
let parsed: Value = from_reader(data.as_slice()).unwrap();
// ...
1
2
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
3
// IRL avoid .unwrap() like hell and propagate errors correctly!
4
5
let (tag, arr) = parsed.as_tag().unwrap();
6
assert_eq!(tag, 18);
7
let arr = arr.as_array().unwrap();
8
let payload = arr[2].as_bytes().unwrap();
9
payload.clone()
10
}
11
12
// ...
13
let (tag, arr) = parsed.as_tag().unwrap();
assert_eq!(tag, 18);
// ...
1
2
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
3
// IRL avoid .unwrap() like hell and propagate errors correctly!
4
let parsed: Value = from_reader(data.as_slice()).unwrap();
5
6
7
let arr = arr.as_array().unwrap();
8
let payload = arr[2].as_bytes().unwrap();
9
payload.clone()
10
}
11
12
// ...
13
loige 58

203. // ...
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
// IRL avoid .unwrap() like hell and propagate errors correctly!
let parsed: Value = from_reader(data.as_slice()).unwrap();
let (tag, arr) = parsed.as_tag().unwrap();
assert_eq!(tag, 18);
let arr = arr.as_array().unwrap();
let payload = arr[2].as_bytes().unwrap();
payload.clone()
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
let parsed: Value = from_reader(data.as_slice()).unwrap();
// ...
1
2
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
3
// IRL avoid .unwrap() like hell and propagate errors correctly!
4
5
let (tag, arr) = parsed.as_tag().unwrap();
6
assert_eq!(tag, 18);
7
let arr = arr.as_array().unwrap();
8
let payload = arr[2].as_bytes().unwrap();
9
payload.clone()
10
}
11
12
// ...
13
let (tag, arr) = parsed.as_tag().unwrap();
assert_eq!(tag, 18);
// ...
1
2
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
3
// IRL avoid .unwrap() like hell and propagate errors correctly!
4
let parsed: Value = from_reader(data.as_slice()).unwrap();
5
6
7
let arr = arr.as_array().unwrap();
8
let payload = arr[2].as_bytes().unwrap();
9
payload.clone()
10
}
11
12
// ...
13
let arr = arr.as_array().unwrap();
// ...
1
2
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
3
// IRL avoid .unwrap() like hell and propagate errors correctly!
4
let parsed: Value = from_reader(data.as_slice()).unwrap();
5
let (tag, arr) = parsed.as_tag().unwrap();
6
assert_eq!(tag, 18);
7
8
let payload = arr[2].as_bytes().unwrap();
9
payload.clone()
10
}
11
12
// ...
13
loige 58

204. // ...
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
// IRL avoid .unwrap() like hell and propagate errors correctly!
let parsed: Value = from_reader(data.as_slice()).unwrap();
let (tag, arr) = parsed.as_tag().unwrap();
assert_eq!(tag, 18);
let arr = arr.as_array().unwrap();
let payload = arr[2].as_bytes().unwrap();
payload.clone()
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
let parsed: Value = from_reader(data.as_slice()).unwrap();
// ...
1
2
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
3
// IRL avoid .unwrap() like hell and propagate errors correctly!
4
5
let (tag, arr) = parsed.as_tag().unwrap();
6
assert_eq!(tag, 18);
7
let arr = arr.as_array().unwrap();
8
let payload = arr[2].as_bytes().unwrap();
9
payload.clone()
10
}
11
12
// ...
13
let (tag, arr) = parsed.as_tag().unwrap();
assert_eq!(tag, 18);
// ...
1
2
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
3
// IRL avoid .unwrap() like hell and propagate errors correctly!
4
let parsed: Value = from_reader(data.as_slice()).unwrap();
5
6
7
let arr = arr.as_array().unwrap();
8
let payload = arr[2].as_bytes().unwrap();
9
payload.clone()
10
}
11
12
// ...
13
let arr = arr.as_array().unwrap();
// ...
1
2
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
3
// IRL avoid .unwrap() like hell and propagate errors correctly!
4
let parsed: Value = from_reader(data.as_slice()).unwrap();
5
let (tag, arr) = parsed.as_tag().unwrap();
6
assert_eq!(tag, 18);
7
8
let payload = arr[2].as_bytes().unwrap();
9
payload.clone()
10
}
11
12
// ...
13
let payload = arr[2].as_bytes().unwrap();
payload.clone()
// ...
1
2
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
3
// IRL avoid .unwrap() like hell and propagate errors correctly!
4
let parsed: Value = from_reader(data.as_slice()).unwrap();
5
let (tag, arr) = parsed.as_tag().unwrap();
6
assert_eq!(tag, 18);
7
let arr = arr.as_array().unwrap();
8
9
10
}
11
12
// ...
13
loige 58

205. // ...
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
// IRL avoid .unwrap() like hell and propagate errors correctly!
let parsed: Value = from_reader(data.as_slice()).unwrap();
let (tag, arr) = parsed.as_tag().unwrap();
assert_eq!(tag, 18);
let arr = arr.as_array().unwrap();
let payload = arr[2].as_bytes().unwrap();
payload.clone()
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
let parsed: Value = from_reader(data.as_slice()).unwrap();
// ...
1
2
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
3
// IRL avoid .unwrap() like hell and propagate errors correctly!
4
5
let (tag, arr) = parsed.as_tag().unwrap();
6
assert_eq!(tag, 18);
7
let arr = arr.as_array().unwrap();
8
let payload = arr[2].as_bytes().unwrap();
9
payload.clone()
10
}
11
12
// ...
13
let (tag, arr) = parsed.as_tag().unwrap();
assert_eq!(tag, 18);
// ...
1
2
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
3
// IRL avoid .unwrap() like hell and propagate errors correctly!
4
let parsed: Value = from_reader(data.as_slice()).unwrap();
5
6
7
let arr = arr.as_array().unwrap();
8
let payload = arr[2].as_bytes().unwrap();
9
payload.clone()
10
}
11
12
// ...
13
let arr = arr.as_array().unwrap();
// ...
1
2
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
3
// IRL avoid .unwrap() like hell and propagate errors correctly!
4
let parsed: Value = from_reader(data.as_slice()).unwrap();
5
let (tag, arr) = parsed.as_tag().unwrap();
6
assert_eq!(tag, 18);
7
8
let payload = arr[2].as_bytes().unwrap();
9
payload.clone()
10
}
11
12
// ...
13
let payload = arr[2].as_bytes().unwrap();
payload.clone()
// ...
1
2
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
3
// IRL avoid .unwrap() like hell and propagate errors correctly!
4
let parsed: Value = from_reader(data.as_slice()).unwrap();
5
let (tag, arr) = parsed.as_tag().unwrap();
6
assert_eq!(tag, 18);
7
let arr = arr.as_array().unwrap();
8
9
10
}
11
12
// ...
13
// ...
fn get_cwt_payload(data: Vec<u8>) -> Vec<u8> {
// IRL avoid .unwrap() like hell and propagate errors correctly!
let parsed: Value = from_reader(data.as_slice()).unwrap();
let (tag, arr) = parsed.as_tag().unwrap();
assert_eq!(tag, 18);
let arr = arr.as_array().unwrap();
let payload = arr[2].as_bytes().unwrap();
payload.clone()
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
loige 58

206. use ciborium::{de::from_reader, value::Value};
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
let parsed_payload = parse_cwt_payload(cwt_payload);
}
fn parse_cwt_payload(data: Vec<u8>) -> Value {
// parse the binary data as CBOR
todo!()
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
loige 59

207. use ciborium::{de::from_reader, value::Value};
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
let parsed_payload = parse_cwt_payload(cwt_payload);
}
fn parse_cwt_payload(data: Vec<u8>) -> Value {
// parse the binary data as CBOR
todo!()
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
let parsed_payload = parse_cwt_payload(cwt_payload);
use ciborium::{de::from_reader, value::Value};
1
2
fn main() {
3
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
4
let no_prefix = remove_prefix(cert_data);
5
let decoded = decode_base45(no_prefix);
6
let decompressed = decompress(decoded);
7
let cwt_payload = get_cwt_payload(decompressed);
8
9
}
10
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fn parse_cwt_payload(data: Vec<u8>) -> Value {
12
// parse the binary data as CBOR
13
todo!()
14
}
15
16
// ...
17
loige 59

208. use ciborium::{de::from_reader, value::Value};
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
let parsed_payload = parse_cwt_payload(cwt_payload);
}
fn parse_cwt_payload(data: Vec<u8>) -> Value {
// parse the binary data as CBOR
todo!()
}
// ...
1
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let parsed_payload = parse_cwt_payload(cwt_payload);
use ciborium::{de::from_reader, value::Value};
1
2
fn main() {
3
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
4
let no_prefix = remove_prefix(cert_data);
5
let decoded = decode_base45(no_prefix);
6
let decompressed = decompress(decoded);
7
let cwt_payload = get_cwt_payload(decompressed);
8
9
}
10
11
fn parse_cwt_payload(data: Vec<u8>) -> Value {
12
// parse the binary data as CBOR
13
todo!()
14
}
15
16
// ...
17
fn parse_cwt_payload(data: Vec<u8>) -> Value {
// parse the binary data as CBOR
todo!()
}
use ciborium::{de::from_reader, value::Value};
1
2
fn main() {
3
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
4
let no_prefix = remove_prefix(cert_data);
5
let decoded = decode_base45(no_prefix);
6
let decompressed = decompress(decoded);
7
let cwt_payload = get_cwt_payload(decompressed);
8
let parsed_payload = parse_cwt_payload(cwt_payload);
9
}
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// ...
17
loige 59

209. use ciborium::{de::from_reader, value::Value};
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
let parsed_payload = parse_cwt_payload(cwt_payload);
println!("{:#?}", parsed_payload);
}
fn parse_cwt_payload(data: Vec<u8>) -> Value {
from_reader(data.as_slice()).unwrap()
}
// ...
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loige 60

210. use ciborium::{de::from_reader, value::Value};
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
let parsed_payload = parse_cwt_payload(cwt_payload);
println!("{:#?}", parsed_payload);
}
fn parse_cwt_payload(data: Vec<u8>) -> Value {
from_reader(data.as_slice()).unwrap()
}
// ...
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from_reader(data.as_slice()).unwrap()
use ciborium::{de::from_reader, value::Value};
1
2
fn main() {
3
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
4
let no_prefix = remove_prefix(cert_data);
5
let decoded = decode_base45(no_prefix);
6
let decompressed = decompress(decoded);
7
let cwt_payload = get_cwt_payload(decompressed);
8
let parsed_payload = parse_cwt_payload(cwt_payload);
9
println!("{:#?}", parsed_payload);
10
}
11
12
fn parse_cwt_payload(data: Vec<u8>) -> Value {
13
14
}
15
16
// ...
17
loige 60

211. use ciborium::{de::from_reader, value::Value};
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
let parsed_payload = parse_cwt_payload(cwt_payload);
println!("{:#?}", parsed_payload);
}
fn parse_cwt_payload(data: Vec<u8>) -> Value {
from_reader(data.as_slice()).unwrap()
}
// ...
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from_reader(data.as_slice()).unwrap()
use ciborium::{de::from_reader, value::Value};
1
2
fn main() {
3
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
4
let no_prefix = remove_prefix(cert_data);
5
let decoded = decode_base45(no_prefix);
6
let decompressed = decompress(decoded);
7
let cwt_payload = get_cwt_payload(decompressed);
8
let parsed_payload = parse_cwt_payload(cwt_payload);
9
println!("{:#?}", parsed_payload);
10
}
11
12
fn parse_cwt_payload(data: Vec<u8>) -> Value {
13
14
}
15
16
// ...
17
println!("{:#?}", parsed_payload);
use ciborium::{de::from_reader, value::Value};
1
2
fn main() {
3
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
4
let no_prefix = remove_prefix(cert_data);
5
let decoded = decode_base45(no_prefix);
6
let decompressed = decompress(decoded);
7
let cwt_payload = get_cwt_payload(decompressed);
8
let parsed_payload = parse_cwt_payload(cwt_payload);
9
10
}
11
12
fn parse_cwt_payload(data: Vec<u8>) -> Value {
13
from_reader(data.as_slice()).unwrap()
14
}
15
16
// ...
17
loige 60

212. use ciborium::{de::from_reader, value::Value};
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
let parsed_payload = parse_cwt_payload(cwt_payload);
println!("{:#?}", parsed_payload);
}
fn parse_cwt_payload(data: Vec<u8>) -> Value {
from_reader(data.as_slice()).unwrap()
}
// ...
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from_reader(data.as_slice()).unwrap()
use ciborium::{de::from_reader, value::Value};
1
2
fn main() {
3
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
4
let no_prefix = remove_prefix(cert_data);
5
let decoded = decode_base45(no_prefix);
6
let decompressed = decompress(decoded);
7
let cwt_payload = get_cwt_payload(decompressed);
8
let parsed_payload = parse_cwt_payload(cwt_payload);
9
println!("{:#?}", parsed_payload);
10
}
11
12
fn parse_cwt_payload(data: Vec<u8>) -> Value {
13
14
}
15
16
// ...
17
println!("{:#?}", parsed_payload);
use ciborium::{de::from_reader, value::Value};
1
2
fn main() {
3
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
4
let no_prefix = remove_prefix(cert_data);
5
let decoded = decode_base45(no_prefix);
6
let decompressed = decompress(decoded);
7
let cwt_payload = get_cwt_payload(decompressed);
8
let parsed_payload = parse_cwt_payload(cwt_payload);
9
10
}
11
12
fn parse_cwt_payload(data: Vec<u8>) -> Value {
13
from_reader(data.as_slice()).unwrap()
14
}
15
16
// ...
17
use ciborium::{de::from_reader, value::Value};
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
let parsed_payload = parse_cwt_payload(cwt_payload);
println!("{:#?}", parsed_payload);
}
fn parse_cwt_payload(data: Vec<u8>) -> Value {
from_reader(data.as_slice()).unwrap()
}
// ...
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loige 60

213. loige 61

214. loige 61

215. Ok, let's make it more readable... 😅
loige 62

216. Ok, let's make it more readable... 😅
loige
cargo add serde_json
62

217. use ciborium::{de::from_reader, value::Value};
use serde_json::to_string_pretty;
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
let parsed_payload = parse_cwt_payload(cwt_payload);
println!("{}", to_string_pretty(&parsed_payload).unwrap());
}
// ...
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13
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loige 63

218. use ciborium::{de::from_reader, value::Value};
use serde_json::to_string_pretty;
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
let parsed_payload = parse_cwt_payload(cwt_payload);
println!("{}", to_string_pretty(&parsed_payload).unwrap());
}
// ...
1
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8
9
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11
12
13
14
use serde_json::to_string_pretty;
use ciborium::{de::from_reader, value::Value};
1
2
3
fn main() {
4
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
5
let no_prefix = remove_prefix(cert_data);
6
let decoded = decode_base45(no_prefix);
7
let decompressed = decompress(decoded);
8
let cwt_payload = get_cwt_payload(decompressed);
9
let parsed_payload = parse_cwt_payload(cwt_payload);
10
println!("{}", to_string_pretty(&parsed_payload).unwrap());
11
}
12
13
// ...
14
loige 63

219. use ciborium::{de::from_reader, value::Value};
use serde_json::to_string_pretty;
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
let parsed_payload = parse_cwt_payload(cwt_payload);
println!("{}", to_string_pretty(&parsed_payload).unwrap());
}
// ...
1
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5
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7
8
9
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11
12
13
14
use serde_json::to_string_pretty;
use ciborium::{de::from_reader, value::Value};
1
2
3
fn main() {
4
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
5
let no_prefix = remove_prefix(cert_data);
6
let decoded = decode_base45(no_prefix);
7
let decompressed = decompress(decoded);
8
let cwt_payload = get_cwt_payload(decompressed);
9
let parsed_payload = parse_cwt_payload(cwt_payload);
10
println!("{}", to_string_pretty(&parsed_payload).unwrap());
11
}
12
13
// ...
14
println!("{}", to_string_pretty(&parsed_payload).unwrap());
use ciborium::{de::from_reader, value::Value};
1
use serde_json::to_string_pretty;
2
3
fn main() {
4
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
5
let no_prefix = remove_prefix(cert_data);
6
let decoded = decode_base45(no_prefix);
7
let decompressed = decompress(decoded);
8
let cwt_payload = get_cwt_payload(decompressed);
9
let parsed_payload = parse_cwt_payload(cwt_payload);
10
11
}
12
13
// ...
14
loige 63

220. use ciborium::{de::from_reader, value::Value};
use serde_json::to_string_pretty;
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
let parsed_payload = parse_cwt_payload(cwt_payload);
println!("{}", to_string_pretty(&parsed_payload).unwrap());
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
use serde_json::to_string_pretty;
use ciborium::{de::from_reader, value::Value};
1
2
3
fn main() {
4
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
5
let no_prefix = remove_prefix(cert_data);
6
let decoded = decode_base45(no_prefix);
7
let decompressed = decompress(decoded);
8
let cwt_payload = get_cwt_payload(decompressed);
9
let parsed_payload = parse_cwt_payload(cwt_payload);
10
println!("{}", to_string_pretty(&parsed_payload).unwrap());
11
}
12
13
// ...
14
println!("{}", to_string_pretty(&parsed_payload).unwrap());
use ciborium::{de::from_reader, value::Value};
1
use serde_json::to_string_pretty;
2
3
fn main() {
4
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
5
let no_prefix = remove_prefix(cert_data);
6
let decoded = decode_base45(no_prefix);
7
let decompressed = decompress(decoded);
8
let cwt_payload = get_cwt_payload(decompressed);
9
let parsed_payload = parse_cwt_payload(cwt_payload);
10
11
}
12
13
// ...
14
use ciborium::{de::from_reader, value::Value};
use serde_json::to_string_pretty;
fn main() {
let cert_data = "HC1:NCFOXN%TSMAHN-H9QCGDSB5QPN9OO3:D4$X4-365KN-TMLV4
let no_prefix = remove_prefix(cert_data);
let decoded = decode_base45(no_prefix);
let decompressed = decompress(decoded);
let cwt_payload = get_cwt_payload(decompressed);
let parsed_payload = parse_cwt_payload(cwt_payload);
println!("{}", to_string_pretty(&parsed_payload).unwrap());
}
// ...
1
2
3
4
5
6
7
8
9
10
11
12
13
14
loige 63

221. loige 64

222. loige 64

223. All the code:
loige.link/green-code
loige 65

224. A better (& more complete) implementation
as a Rust library
loige
github.com/rust-italia/dgc
66

225. Exercise for the viewer:
Try to validate the signature
loige 67

226. Exercise for the viewer:
Try to validate the signature
loige
🔑You can get the Public Key from the certificate
here: loige.link/green-examples
67

227. Exercise for the viewer:
Try to validate the signature
loige
🔑You can get the Public Key from the certificate
here: loige.link/green-examples
📑Here you can find more about how the CoseSign1
protocol works: loige.link/cose-sign-verif
67

228. Exercise for the viewer:
Try to validate the signature
loige
🔑You can get the Public Key from the certificate
here: loige.link/green-examples
📑Here you can find more about how the CoseSign1
protocol works: loige.link/cose-sign-verif
📦You could use a crate like for crypto!
ring
67

229. Exercise for the viewer:
Try to validate the signature
loige
🔑You can get the Public Key from the certificate
here: loige.link/green-examples
📑Here you can find more about how the CoseSign1
protocol works: loige.link/cose-sign-verif
📦You could use a crate like for crypto!
ring
(Spoiler: I implemented some of this stuff in my library!)
67

230. Is all this stuff legal? 😰
loige 68

231. Is all this stuff legal? 😰
loige
👀You can certainly look into your certificate (and the
test certificates!)
68

232. Is all this stuff legal? 😰
loige
👀You can certainly look into your certificate (and the
test certificates!)
🗣Looking into other people's certificate will disclose
a lot of privacy-sensitive info (thread carefully)
68

233. Is all this stuff legal? 😰
loige
👀You can certainly look into your certificate (and the
test certificates!)
🗣Looking into other people's certificate will disclose
a lot of privacy-sensitive info (thread carefully)
📲Building a validator app? Check your country's
regulation (especially if you need to store data!)
68

234. Cover Picture by on
❤ Huge thanks to for some precius review sessions and many pull requests!
❤ Thanks to , , , , for reviews and suggestions.
FPVmat A Unsplash
rust-italia
@gbinside @88_eugen @AlleviTommaso @npmccallum @pelger
loige
☝nodejsdp.link
loige.link/green
THANK YOU!
❤
69