A look inside the European Covid Green Certificate (Codemotion 2021)

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

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

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// ... fn get_cwt_payload(data: Vec) -> Vec { // 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) -> Vec { 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) -> Vec { 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) -> Vec { 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) -> Vec { 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) -> Vec { // 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

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

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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

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