A library to encode ASCII into Base64 and decode Base64 into ASCII
Takees an input byte array of ASCII characters and produces an output byte array of base64-encoded characters. The 6-bit base64 characters are packed into a concatenated byte array (e.g. 4 bytes of ASCII produce 3 bytes of encoded Base64)
Takes an input byte array of packed base64 characters and produces an output byte array of ASCII characters (e.g. 3 input bytes of base64 produces 4 output bytes of ASCII)
Takes an input byte array of ASCII characters and produces an output byte array of base64-encoded characters. Data is not packed i.e. each output array element maps to a 6-bit base64 character
Takes an input byte array of base64 characters and produces an output byte array of ASCII characters. Input data is not packed i.e. each input element maps to a 6-bit base64 character
(see tests in lib.nr for more examples)
use dep::noir_base64;
fn encode() {
// Raw bh: GxMlgwLiypnVrE2C0Sf4yzhcWTkAhSZ5+WERhKhXtlU=
// Translated directly to ASCII
let input: [u8; 44] = [
71, 120, 77, 108, 103,
119, 76, 105, 121, 112,
110, 86, 114, 69, 50,
67, 48, 83, 102, 52,
121, 122, 104, 99, 87,
84, 107, 65, 104, 83,
90, 53, 43, 87, 69,
82, 104, 75, 104, 88,
116, 108, 85, 61
];
// will produce packed byte array of base64 chars:
/*
[
27, 19, 37, 131, 2, 226, 202, 153, 213, 172,
77, 130, 209, 39, 248, 203, 56, 92, 89, 57,
0, 133, 38, 121, 249, 97, 17, 132, 168, 87,
182, 85
]
*/
let result: [u8; 32] = noir_base64::base64_encode(input);
}
base64_encode_elements will encode an array of 44 ASCII bytes in ~470 gates, plus a ~256 gate cost to initialize an encoding lookup table (the initialization cost is incurred once regardless of the number of decodings)