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# ---> Romulus-JS
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# Build output
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dist/
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# dist/
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# ---> VisualStudioCode
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.vscode/*
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@ -171,7 +171,7 @@ out
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# Nuxt.js build / generate output
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.nuxt
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dist
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# dist
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# Gatsby files
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.cache/
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export declare const MEMBER_MASK = 32;
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export declare const NB_ROUNDS = 40;
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export declare const TWEAK_LENGTH = 48;
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export declare const PT: number[];
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export declare const LFSR_8_TK2: number[];
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export declare const LFSR_8_TK3: number[];
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export declare const S8: number[];
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export declare const C: number[];
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export declare const T_LENGTH = 16;
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export declare const COUNTER_LENGTH = 7;
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.COUNTER_LENGTH = exports.T_LENGTH = exports.C = exports.S8 = exports.LFSR_8_TK3 = exports.LFSR_8_TK2 = exports.PT = exports.TWEAK_LENGTH = exports.NB_ROUNDS = exports.MEMBER_MASK = void 0;
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// SKINNY-128/384+ block cipher constants.
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exports.MEMBER_MASK = 32;
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exports.NB_ROUNDS = 40;
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exports.TWEAK_LENGTH = 48;
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exports.PT = [9, 15, 8, 13, 10, 14, 12, 11, 0, 1, 2, 3, 4, 5, 6, 7];
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exports.LFSR_8_TK2 = [
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0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50, 52, 54, 56,
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58, 60, 62, 65, 67, 69, 71, 73, 75, 77, 79, 81, 83, 85, 87, 89, 91, 93, 95, 97, 99, 101, 103, 105, 107, 109,
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111, 113, 115, 117, 119, 121, 123, 125, 127, 128, 130, 132, 134, 136, 138, 140, 142, 144, 146, 148, 150, 152,
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154, 156, 158, 160, 162, 164, 166, 168, 170, 172, 174, 176, 178, 180, 182, 184, 186, 188, 190, 193, 195, 197,
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199, 201, 203, 205, 207, 209, 211, 213, 215, 217, 219, 221, 223, 225, 227, 229, 231, 233, 235, 237, 239, 241,
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243, 245, 247, 249, 251, 253, 255, 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39,
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41, 43, 45, 47, 49, 51, 53, 55, 57, 59, 61, 63, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86, 88, 90, 92,
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94, 96, 98, 100, 102, 104, 106, 108, 110, 112, 114, 116, 118, 120, 122, 124, 126, 129, 131, 133, 135, 137,
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139, 141, 143, 145, 147, 149, 151, 153, 155, 157, 159, 161, 163, 165, 167, 169, 171, 173, 175, 177, 179, 181,
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183, 185, 187, 189, 191, 192, 194, 196, 198, 200, 202, 204, 206, 208, 210, 212, 214, 216, 218, 220, 222, 224,
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226, 228, 230, 232, 234, 236, 238, 240, 242, 244, 246, 248, 250, 252, 254
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];
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exports.LFSR_8_TK3 = [
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0, 128, 1, 129, 2, 130, 3, 131, 4, 132, 5, 133, 6, 134, 7, 135, 8, 136, 9, 137, 10, 138, 11, 139, 12, 140,
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13, 141, 14, 142, 15, 143, 16, 144, 17, 145, 18, 146, 19, 147, 20, 148, 21, 149, 22, 150, 23, 151, 24, 152,
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25, 153, 26, 154, 27, 155, 28, 156, 29, 157, 30, 158, 31, 159, 160, 32, 161, 33, 162, 34, 163, 35, 164, 36,
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165, 37, 166, 38, 167, 39, 168, 40, 169, 41, 170, 42, 171, 43, 172, 44, 173, 45, 174, 46, 175, 47, 176, 48,
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177, 49, 178, 50, 179, 51, 180, 52, 181, 53, 182, 54, 183, 55, 184, 56, 185, 57, 186, 58, 187, 59, 188, 60,
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189, 61, 190, 62, 191, 63, 64, 192, 65, 193, 66, 194, 67, 195, 68, 196, 69, 197, 70, 198, 71, 199, 72, 200,
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73, 201, 74, 202, 75, 203, 76, 204, 77, 205, 78, 206, 79, 207, 80, 208, 81, 209, 82, 210, 83, 211, 84, 212,
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85, 213, 86, 214, 87, 215, 88, 216, 89, 217, 90, 218, 91, 219, 92, 220, 93, 221, 94, 222, 95, 223, 224, 96,
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225, 97, 226, 98, 227, 99, 228, 100, 229, 101, 230, 102, 231, 103, 232, 104, 233, 105, 234, 106, 235, 107,
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236, 108, 237, 109, 238, 110, 239, 111, 240, 112, 241, 113, 242, 114, 243, 115, 244, 116, 245, 117, 246,
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118, 247, 119, 248, 120, 249, 121, 250, 122, 251, 123, 252, 124, 253, 125, 254, 126, 255, 127
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];
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exports.S8 = [
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0x65, 0x4c, 0x6a, 0x42, 0x4b, 0x63, 0x43, 0x6b, 0x55, 0x75, 0x5a, 0x7a, 0x53, 0x73, 0x5b, 0x7b,
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0x35, 0x8c, 0x3a, 0x81, 0x89, 0x33, 0x80, 0x3b, 0x95, 0x25, 0x98, 0x2a, 0x90, 0x23, 0x99, 0x2b,
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0xe5, 0xcc, 0xe8, 0xc1, 0xc9, 0xe0, 0xc0, 0xe9, 0xd5, 0xf5, 0xd8, 0xf8, 0xd0, 0xf0, 0xd9, 0xf9,
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0xa5, 0x1c, 0xa8, 0x12, 0x1b, 0xa0, 0x13, 0xa9, 0x05, 0xb5, 0x0a, 0xb8, 0x03, 0xb0, 0x0b, 0xb9,
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0x32, 0x88, 0x3c, 0x85, 0x8d, 0x34, 0x84, 0x3d, 0x91, 0x22, 0x9c, 0x2c, 0x94, 0x24, 0x9d, 0x2d,
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0x62, 0x4a, 0x6c, 0x45, 0x4d, 0x64, 0x44, 0x6d, 0x52, 0x72, 0x5c, 0x7c, 0x54, 0x74, 0x5d, 0x7d,
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0xa1, 0x1a, 0xac, 0x15, 0x1d, 0xa4, 0x14, 0xad, 0x02, 0xb1, 0x0c, 0xbc, 0x04, 0xb4, 0x0d, 0xbd,
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0xe1, 0xc8, 0xec, 0xc5, 0xcd, 0xe4, 0xc4, 0xed, 0xd1, 0xf1, 0xdc, 0xfc, 0xd4, 0xf4, 0xdd, 0xfd,
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0x36, 0x8e, 0x38, 0x82, 0x8b, 0x30, 0x83, 0x39, 0x96, 0x26, 0x9a, 0x28, 0x93, 0x20, 0x9b, 0x29,
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0x66, 0x4e, 0x68, 0x41, 0x49, 0x60, 0x40, 0x69, 0x56, 0x76, 0x58, 0x78, 0x50, 0x70, 0x59, 0x79,
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0xa6, 0x1e, 0xaa, 0x11, 0x19, 0xa3, 0x10, 0xab, 0x06, 0xb6, 0x08, 0xba, 0x00, 0xb3, 0x09, 0xbb,
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0xe6, 0xce, 0xea, 0xc2, 0xcb, 0xe3, 0xc3, 0xeb, 0xd6, 0xf6, 0xda, 0xfa, 0xd3, 0xf3, 0xdb, 0xfb,
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0x31, 0x8a, 0x3e, 0x86, 0x8f, 0x37, 0x87, 0x3f, 0x92, 0x21, 0x9e, 0x2e, 0x97, 0x27, 0x9f, 0x2f,
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0x61, 0x48, 0x6e, 0x46, 0x4f, 0x67, 0x47, 0x6f, 0x51, 0x71, 0x5e, 0x7e, 0x57, 0x77, 0x5f, 0x7f,
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0xa2, 0x18, 0xae, 0x16, 0x1f, 0xa7, 0x17, 0xaf, 0x01, 0xb2, 0x0e, 0xbe, 0x07, 0xb7, 0x0f, 0xbf,
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0xe2, 0xca, 0xee, 0xc6, 0xcf, 0xe7, 0xc7, 0xef, 0xd2, 0xf2, 0xde, 0xfe, 0xd7, 0xf7, 0xdf, 0xff
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];
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exports.C = [
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0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3E, 0x3D, 0x3B, 0x37, 0x2F,
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0x1E, 0x3C, 0x39, 0x33, 0x27, 0x0E, 0x1D, 0x3A, 0x35, 0x2B,
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0x16, 0x2C, 0x18, 0x30, 0x21, 0x02, 0x05, 0x0B, 0x17, 0x2E,
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0x1C, 0x38, 0x31, 0x23, 0x06, 0x0D, 0x1B, 0x36, 0x2D, 0x1A
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];
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// Romulus-M cryptography specification constants.
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exports.T_LENGTH = 16;
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exports.COUNTER_LENGTH = 7;
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//# sourceMappingURL=constants.js.map
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File diff suppressed because one or more lines are too long
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/// <reference types="node" />
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export declare function decrypt(ciphertext: Buffer, associatedData: Buffer, nonce: Buffer, key: Buffer): Buffer;
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.decrypt = void 0;
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const romulus_m_1 = require("./romulus-m");
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function decrypt(ciphertext, associatedData, nonce, key) {
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const plaintext = (0, romulus_m_1.cryptoAeadDecrypt)(Array.from(ciphertext), Array.from(associatedData), Array.from(nonce), Array.from(key));
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return Buffer.from(plaintext);
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}
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exports.decrypt = decrypt;
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//# sourceMappingURL=decrypt.js.map
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{"version":3,"file":"decrypt.js","sourceRoot":"","sources":["../src/decrypt.ts"],"names":[],"mappings":";;;AAAA,2CAA+C;AAE/C,SAAgB,OAAO,CAAE,UAAkB,EAAE,cAAsB,EAAE,KAAa,EAAE,GAAW;IAC7F,MAAM,SAAS,GAAG,IAAA,6BAAiB,EAAC,KAAK,CAAC,IAAI,CAAC,UAAU,CAAC,EAAE,KAAK,CAAC,IAAI,CAAC,cAAc,CAAC,EAAE,KAAK,CAAC,IAAI,CAAC,KAAK,CAAC,EAAE,KAAK,CAAC,IAAI,CAAC,GAAG,CAAC,CAAC,CAAA;IAC3H,OAAO,MAAM,CAAC,IAAI,CAAC,SAAS,CAAC,CAAA;AAC/B,CAAC;AAHD,0BAGC"}
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/// <reference types="node" />
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export declare function encrypt(message: Buffer, associatedData: Buffer, nonce: Buffer, key: Buffer): Buffer;
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.encrypt = void 0;
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const romulus_m_1 = require("./romulus-m");
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function encrypt(message, associatedData, nonce, key) {
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const ciphertext = (0, romulus_m_1.cryptoAeadEncrypt)(Array.from(message), Array.from(associatedData), Array.from(nonce), Array.from(key));
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return Buffer.from(ciphertext);
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}
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exports.encrypt = encrypt;
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//# sourceMappingURL=encrypt.js.map
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{"version":3,"file":"encrypt.js","sourceRoot":"","sources":["../src/encrypt.ts"],"names":[],"mappings":";;;AAAA,2CAA+C;AAE/C,SAAgB,OAAO,CAAE,OAAe,EAAE,cAAsB,EAAE,KAAa,EAAE,GAAW;IAC1F,MAAM,UAAU,GAAG,IAAA,6BAAiB,EAAC,KAAK,CAAC,IAAI,CAAC,OAAO,CAAC,EAAE,KAAK,CAAC,IAAI,CAAC,cAAc,CAAC,EAAE,KAAK,CAAC,IAAI,CAAC,KAAK,CAAC,EAAE,KAAK,CAAC,IAAI,CAAC,GAAG,CAAC,CAAC,CAAA;IACzH,OAAO,MAAM,CAAC,IAAI,CAAC,UAAU,CAAC,CAAA;AAChC,CAAC;AAHD,0BAGC"}
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export { encrypt } from './encrypt';
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export { decrypt } from './decrypt';
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.decrypt = exports.encrypt = void 0;
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var encrypt_1 = require("./encrypt");
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Object.defineProperty(exports, "encrypt", { enumerable: true, get: function () { return encrypt_1.encrypt; } });
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var decrypt_1 = require("./decrypt");
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Object.defineProperty(exports, "decrypt", { enumerable: true, get: function () { return decrypt_1.decrypt; } });
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//# sourceMappingURL=index.js.map
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{"version":3,"file":"index.js","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":";;;AAAA,qCAAmC;AAA1B,kGAAA,OAAO,OAAA;AAChB,qCAAmC;AAA1B,kGAAA,OAAO,OAAA"}
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/**
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* Encrypt a message using the Romulus-M cryptography specification.
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* @param message The message to encrypt.
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* @param associatedData The associated data to encrypt.
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* @param nonce A 128 bit nonce.
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* @param key A 128 bit encryption key.
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* @returns The encrypted ciphertext.
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*/
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export declare function cryptoAeadEncrypt(message: number[], associatedData: number[], nonce: number[], key: number[]): number[];
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/**
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* Decrypt a message using the Romulus-M cryptography specification.
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* @param ciphertext The ciphertext to decrypt.
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* @param associatedData The associated data.
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* @param nonce The nonce.
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* @param key The key.
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* @returns The decrypted plaintext.
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*/
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export declare function cryptoAeadDecrypt(ciphertext: number[], associatedData: number[], nonce: number[], key: number[]): number[];
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.cryptoAeadDecrypt = exports.cryptoAeadEncrypt = void 0;
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const constants_1 = require("./constants");
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const skinny_128_384_plus_1 = require("./skinny-128-384-plus");
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/**
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* Parse message into blocks.
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* @param message The message to parse.
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* @param blockLength The block length.
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* @returns An array of blocks.
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*/
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function parse(message, blockLength) {
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// Keep track of position in message currently parsed into blocks.
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let cursor = 0;
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// Slice message into blocks.
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let ret = [];
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while (message.length - cursor >= blockLength) {
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ret.push(...[message.slice(cursor, cursor + blockLength)]);
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cursor = cursor + blockLength;
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}
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// Append any remaining blocks regardless of block length. These will be padded later.
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if (message.length - cursor > 0) {
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ret.push(...[message.slice(cursor)]);
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}
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// If no message, return a single block.
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if (message.length === 0) {
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ret = [[]];
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}
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// Insert empty array at position 0.
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ret.splice(0, 0, []);
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return ret;
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}
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/**
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* Pads the byte length of message to padLength. The final byte (when padded) contains the original message length.
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* @param message The message to pad.
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* @param padLength The length to pad the message to.
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* @returns A padded block.
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*/
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function pad(message, padLength) {
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// If there is no message, return a fully padded block.
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if (message.length === 0) {
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return Array(16).fill(0);
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}
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// Return a copy of the message if no padding is required.
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if (message.length === padLength) {
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return [...message];
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}
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// Pad a copy of the message to padLength.
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const ret = [...message];
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const requiredPadding = padLength - message.length - 1;
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ret.push(...Array(requiredPadding).fill(0));
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// Set the final byte of the padded blocked to the length of the original message.
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ret[padLength - 1] = message.length;
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return ret;
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}
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/**
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* Generate the key stream from the internal state by multiplying the state S and the constant matrix G.
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* @param state The state from which the key stream will be generated.
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* @returns The key stream.
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*/
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function g(state) {
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return state.map(x => {
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return (x >> 1) ^ (x & 0x80) ^ ((x & 0x01) << 7);
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});
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}
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/**
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* The state update function. Pads an M block.
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* @param state The internal state, S.
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* @param mBlock An M block.
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* @returns [S', C] where S' = M ⊕ S and C = M ⊕ G(S)
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*/
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function rho(state, mBlock) {
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// G(S)
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const gOfS = g(state);
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// C = M ⊕ G(S)
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const c = [...Array(16).keys()].map(i => mBlock[i] ^ gOfS[i]);
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// S' = M ⊕ S
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const nextState = [...Array(16).keys()].map(i => state[i] ^ mBlock[i]);
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return [nextState, c];
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}
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/**
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* The state update function. Pads a C block.
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* @param state The internal state, S.
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* @param cBlock A C block.
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* @returns [S', M] where M = C ⊕ G(S) and S' = C ⊕ M.
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*/
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function inverseRoh(state, cBlock) {
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// G(S)
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const gOfS = g(state);
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// M = C ⊕ G(S)
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const mBlock = [...Array(16).keys()].map(i => cBlock[i] ^ gOfS[i]);
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// S' = S ⊕ M
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const nextState = [...Array(16).keys()].map(i => state[i] ^ mBlock[i]);
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return [nextState, mBlock];
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}
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/**
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* Increments the 56 bit LFSR-based counter.
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* @param counter The old counter.
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* @returns An incremented counter.
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*/
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function increaseCounter(counter) {
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const fb0 = counter[6] >> 7;
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counter[6] = (counter[6] << 1) | (counter[5] >> 7);
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counter[5] = (counter[5] << 1) | (counter[4] >> 7);
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counter[4] = (counter[4] << 1) | (counter[3] >> 7);
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counter[3] = (counter[3] << 1) | (counter[2] >> 7);
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counter[2] = (counter[2] << 1) | (counter[1] >> 7);
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counter[1] = (counter[1] << 1) | (counter[0] >> 7);
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if (fb0 === 1) {
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counter[0] = (counter[0] << 1) ^ 0x95;
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}
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else {
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counter[0] = (counter[0] << 1);
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}
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return counter;
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}
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/**
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* Returns a reset counter.
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* @returns A reset counter.
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*/
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function resetCounter() {
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const counter = Array(constants_1.COUNTER_LENGTH).fill(0);
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counter[0] = 1;
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return counter;
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}
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/**
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* Returns a zeroed buffer.
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* @param bufferLength The length of the buffer to return.
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* @returns A zeroed buffer.
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*/
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function zeroedBuffer(bufferLength) {
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return Array(bufferLength).fill(0);
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}
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/**
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* Calculate the domain separation.
|
||||
* @param combinedData The parsed and concatenated message and associated data,
|
||||
* @param parsedMessageLength The length of the parsed message.
|
||||
* @param parsedAssociatedDataLength The length of the parsed associated data.
|
||||
*/
|
||||
function calculateDomainSeparation(combinedData, parsedMessageLength, parsedAssociatedDataLength) {
|
||||
let domainSeparation = 16;
|
||||
if (combinedData[parsedAssociatedDataLength].length < 16) {
|
||||
domainSeparation = domainSeparation ^ 2;
|
||||
}
|
||||
if (combinedData[parsedAssociatedDataLength + parsedMessageLength].length < 16) {
|
||||
domainSeparation = domainSeparation ^ 1;
|
||||
}
|
||||
if (parsedAssociatedDataLength % 2 === 0) {
|
||||
domainSeparation = domainSeparation ^ 8;
|
||||
}
|
||||
if (parsedMessageLength % 2 === 0) {
|
||||
domainSeparation = domainSeparation ^ 4;
|
||||
}
|
||||
return domainSeparation;
|
||||
}
|
||||
/**
|
||||
* Encrypt a message using the Romulus-M cryptography specification.
|
||||
* @param message The message to encrypt.
|
||||
* @param associatedData The associated data to encrypt.
|
||||
* @param nonce A 128 bit nonce.
|
||||
* @param key A 128 bit encryption key.
|
||||
* @returns The encrypted ciphertext.
|
||||
*/
|
||||
function cryptoAeadEncrypt(message, associatedData, nonce, key) {
|
||||
// Buffer for ciphertext.
|
||||
const ciphertext = [];
|
||||
// Reset state and counter.
|
||||
let state = zeroedBuffer(16);
|
||||
let counter = resetCounter();
|
||||
// Carve message and associated data into blocks.
|
||||
const messageBlocks = parse(message, 16);
|
||||
const messageBlockCount = messageBlocks.length - 1;
|
||||
const associatedDataBlocks = parse(associatedData, 16);
|
||||
const associatedDataBlockCount = associatedDataBlocks.length - 1;
|
||||
// Concatenate the message and associated data blocks, excluding each array's first element.
|
||||
const combinedDataBlocks = associatedDataBlocks.slice(1).concat(messageBlocks.slice(1));
|
||||
// Insert empty array at position 0.
|
||||
combinedDataBlocks.splice(0, 0, []);
|
||||
// Calculate domain separation for final encryption stage.
|
||||
const domainSeparation = calculateDomainSeparation(combinedDataBlocks, messageBlockCount, associatedDataBlockCount);
|
||||
// Pad combined data.
|
||||
combinedDataBlocks[associatedDataBlockCount] = pad(combinedDataBlocks[associatedDataBlockCount], 16);
|
||||
combinedDataBlocks[associatedDataBlockCount + messageBlockCount] = pad(combinedDataBlocks[associatedDataBlockCount + messageBlockCount], 16);
|
||||
// Do the encryption.
|
||||
// See https://romulusae.github.io/romulus/docs/Romulusv1.3.pdf for more information.
|
||||
let x = 8;
|
||||
for (let i = 1; i < Math.floor((associatedDataBlockCount + messageBlockCount) / 2) + 1; i++) {
|
||||
[state] = rho(state, combinedDataBlocks[2 * i - 1]);
|
||||
counter = increaseCounter(counter);
|
||||
if (i === Math.floor(associatedDataBlockCount / 2) + 1) {
|
||||
x = x ^ 4;
|
||||
}
|
||||
state = (0, skinny_128_384_plus_1.skinnyEncrypt)(state, (0, skinny_128_384_plus_1.tweakeyEncode)(counter, x, combinedDataBlocks[2 * i], key));
|
||||
counter = increaseCounter(counter);
|
||||
}
|
||||
if (associatedDataBlockCount % 2 === messageBlockCount % 2) {
|
||||
[state] = rho(state, zeroedBuffer(16));
|
||||
}
|
||||
else {
|
||||
[state] = rho(state, combinedDataBlocks[associatedDataBlockCount + messageBlockCount]);
|
||||
counter = increaseCounter(counter);
|
||||
}
|
||||
const [, authenticationTag] = rho((0, skinny_128_384_plus_1.skinnyEncrypt)(state, (0, skinny_128_384_plus_1.tweakeyEncode)(counter, domainSeparation, nonce, key)), zeroedBuffer(16));
|
||||
if (message.length === 0) {
|
||||
return authenticationTag;
|
||||
}
|
||||
state = [...authenticationTag];
|
||||
counter = resetCounter();
|
||||
const originalFinalMessageBlockLength = messageBlocks[messageBlockCount].length;
|
||||
messageBlocks[messageBlockCount] = pad(messageBlocks[messageBlockCount], 16);
|
||||
for (let i = 1; i < messageBlockCount + 1; i++) {
|
||||
state = (0, skinny_128_384_plus_1.skinnyEncrypt)(state, (0, skinny_128_384_plus_1.tweakeyEncode)(counter, 4, nonce, key));
|
||||
let cBlock;
|
||||
[state, cBlock] = rho(state, messageBlocks[i]);
|
||||
counter = increaseCounter(counter);
|
||||
if (i < messageBlockCount) {
|
||||
ciphertext.push(...cBlock);
|
||||
}
|
||||
else {
|
||||
ciphertext.push(...cBlock.slice(0, originalFinalMessageBlockLength));
|
||||
}
|
||||
}
|
||||
// The authentication tag is stored in the final 16 bytes of the ciphertext.
|
||||
ciphertext.push(...authenticationTag);
|
||||
return ciphertext;
|
||||
}
|
||||
exports.cryptoAeadEncrypt = cryptoAeadEncrypt;
|
||||
/**
|
||||
* Decrypt a message using the Romulus-M cryptography specification.
|
||||
* @param ciphertext The ciphertext to decrypt.
|
||||
* @param associatedData The associated data.
|
||||
* @param nonce The nonce.
|
||||
* @param key The key.
|
||||
* @returns The decrypted plaintext.
|
||||
*/
|
||||
function cryptoAeadDecrypt(ciphertext, associatedData, nonce, key) {
|
||||
// Buffer for decrypted message.
|
||||
const message = [];
|
||||
// The authentication tag is represented by the final 16 bytes of the ciphertext.
|
||||
const authenticationTag = ciphertext.slice(-16);
|
||||
ciphertext.length -= 16;
|
||||
// Reset state and counter.
|
||||
let state = zeroedBuffer(16);
|
||||
let counter = resetCounter();
|
||||
if (ciphertext.length !== 0) {
|
||||
// Combine the ciphertext
|
||||
state = [...authenticationTag];
|
||||
const ciphertextBlocks = parse(ciphertext, 16);
|
||||
const ciphertextBlockCount = ciphertextBlocks.length - 1;
|
||||
const finalCiphertextBlockLength = ciphertextBlocks[ciphertextBlockCount].length;
|
||||
ciphertextBlocks[ciphertextBlockCount] = pad(ciphertextBlocks[ciphertextBlockCount], 16);
|
||||
for (let i = 1; i < ciphertextBlockCount + 1; i++) {
|
||||
state = (0, skinny_128_384_plus_1.skinnyEncrypt)(state, (0, skinny_128_384_plus_1.tweakeyEncode)(counter, 4, nonce, key));
|
||||
let mBlock;
|
||||
[state, mBlock] = inverseRoh(state, ciphertextBlocks[i]);
|
||||
counter = increaseCounter(counter);
|
||||
if (i < ciphertextBlockCount) {
|
||||
message.push(...mBlock);
|
||||
}
|
||||
else {
|
||||
message.push(...mBlock.slice(0, finalCiphertextBlockLength));
|
||||
}
|
||||
}
|
||||
}
|
||||
else {
|
||||
state = [];
|
||||
}
|
||||
// Reset state and counter.
|
||||
state = zeroedBuffer(16);
|
||||
counter = resetCounter();
|
||||
// Carve the message and associated data into blocks.
|
||||
const messageBlocks = parse(message, 16);
|
||||
const messageBlockLength = messageBlocks.length - 1;
|
||||
const associatedDataBlocks = parse(associatedData, 16);
|
||||
const associatedDataBlockCount = associatedDataBlocks.length - 1;
|
||||
// Concatenate the message and associated data blocks, excluding each array's first element.
|
||||
const combinedData = associatedDataBlocks.slice(1).concat(messageBlocks.slice(1));
|
||||
// Insert empty array at position 0.
|
||||
combinedData.splice(0, 0, []);
|
||||
// Calculate domain separation for final decryption stage.
|
||||
const domainSeparation = calculateDomainSeparation(combinedData, messageBlockLength, associatedDataBlockCount);
|
||||
// Pad combined data.
|
||||
combinedData[associatedDataBlockCount] = pad(combinedData[associatedDataBlockCount], 16);
|
||||
combinedData[associatedDataBlockCount + messageBlockLength] = pad(combinedData[associatedDataBlockCount + messageBlockLength], 16);
|
||||
let x = 8;
|
||||
for (let i = 1; i < Math.floor((associatedDataBlockCount + messageBlockLength) / 2) + 1; i++) {
|
||||
[state] = rho(state, combinedData[2 * i - 1]);
|
||||
counter = increaseCounter(counter);
|
||||
if (i === Math.floor(associatedDataBlockCount / 2) + 1) {
|
||||
x = x ^ 4;
|
||||
}
|
||||
state = (0, skinny_128_384_plus_1.skinnyEncrypt)(state, (0, skinny_128_384_plus_1.tweakeyEncode)(counter, x, combinedData[2 * i], key));
|
||||
counter = increaseCounter(counter);
|
||||
}
|
||||
if (associatedDataBlockCount % 2 === messageBlockLength % 2) {
|
||||
[state] = rho(state, zeroedBuffer(16));
|
||||
}
|
||||
else {
|
||||
[state] = rho(state, combinedData[associatedDataBlockCount + messageBlockLength]);
|
||||
counter = increaseCounter(counter);
|
||||
}
|
||||
// Calculate authentication tag.
|
||||
const [, computedTag] = rho((0, skinny_128_384_plus_1.skinnyEncrypt)(state, (0, skinny_128_384_plus_1.tweakeyEncode)(counter, domainSeparation, nonce, key)), zeroedBuffer(16));
|
||||
let compare = 0;
|
||||
for (let i = 0; i < 16; i++) {
|
||||
compare |= (authenticationTag[i] ^ computedTag[i]);
|
||||
}
|
||||
if (compare !== 0) {
|
||||
return [];
|
||||
}
|
||||
else {
|
||||
return message;
|
||||
}
|
||||
}
|
||||
exports.cryptoAeadDecrypt = cryptoAeadDecrypt;
|
||||
//# sourceMappingURL=romulus-m.js.map
|
||||
File diff suppressed because one or more lines are too long
|
|
@ -0,0 +1,16 @@
|
|||
/**
|
||||
* Create a tweakey based on the specified domain separation, nonce, key and current counter state.
|
||||
* @param counter The counter.
|
||||
* @param domainSeparation The domain separation.
|
||||
* @param nonce The nonce.
|
||||
* @param key The encryption key.
|
||||
* @returns The tweakey.
|
||||
*/
|
||||
export declare function tweakeyEncode(counter: number[], domainSeparation: number, nonce: number[], key: number[]): number[];
|
||||
/**
|
||||
* Perform a round of SKINNY-188/384+ encryption.
|
||||
* @param plaintext The plaintext to encrypt.
|
||||
* @param tweakey The tweakey to use for encryption.
|
||||
* @returns The ciphertext.
|
||||
*/
|
||||
export declare function skinnyEncrypt(plaintext: number[], tweakey: number[]): number[];
|
||||
|
|
@ -0,0 +1,59 @@
|
|||
"use strict";
|
||||
Object.defineProperty(exports, "__esModule", { value: true });
|
||||
exports.skinnyEncrypt = exports.tweakeyEncode = void 0;
|
||||
const constants_1 = require("./constants");
|
||||
/**
|
||||
* Create a tweakey based on the specified domain separation, nonce, key and current counter state.
|
||||
* @param counter The counter.
|
||||
* @param domainSeparation The domain separation.
|
||||
* @param nonce The nonce.
|
||||
* @param key The encryption key.
|
||||
* @returns The tweakey.
|
||||
*/
|
||||
function tweakeyEncode(counter, domainSeparation, nonce, key) {
|
||||
return counter.concat([domainSeparation ^ constants_1.MEMBER_MASK], Array(8).fill(0), nonce, key);
|
||||
}
|
||||
exports.tweakeyEncode = tweakeyEncode;
|
||||
/**
|
||||
* Perform a round of SKINNY-188/384+ encryption.
|
||||
* @param plaintext The plaintext to encrypt.
|
||||
* @param tweakey The tweakey to use for encryption.
|
||||
* @returns The ciphertext.
|
||||
*/
|
||||
function skinnyEncrypt(plaintext, tweakey) {
|
||||
const tk = Array(constants_1.NB_ROUNDS + 1).fill(Array(constants_1.TWEAK_LENGTH).fill(0));
|
||||
tk[0] = [...Array(constants_1.TWEAK_LENGTH).keys()].map(i => tweakey[i]);
|
||||
for (let i = 0; i < constants_1.NB_ROUNDS - 1; i++) {
|
||||
tk[i + 1] = [...tk[i]];
|
||||
for (let j = 0; j < constants_1.TWEAK_LENGTH; j++) {
|
||||
tk[i + 1][j] = tk[i][j - j % 16 + constants_1.PT[j % 16]];
|
||||
}
|
||||
for (let j = 0; j < 8; j++) {
|
||||
tk[i + 1][j + 16] = constants_1.LFSR_8_TK2[tk[i + 1][j + 16]];
|
||||
tk[i + 1][j + 32] = constants_1.LFSR_8_TK3[tk[i + 1][j + 32]];
|
||||
}
|
||||
}
|
||||
let s = [...Array(16).keys()].map(i => plaintext[i]);
|
||||
for (let i = 0; i < constants_1.NB_ROUNDS; i++) {
|
||||
for (let j = 0; j < 16; j++) {
|
||||
s[j] = constants_1.S8[s[j]];
|
||||
}
|
||||
s[0] ^= (constants_1.C[i] & 0xf);
|
||||
s[4] ^= (constants_1.C[i] >> 4) & 0xf;
|
||||
s[8] ^= 0x2;
|
||||
for (let j = 0; j < 8; j++) {
|
||||
s[j] ^= tk[i][j] ^ tk[i][j + 16] ^ tk[i][j + 32];
|
||||
}
|
||||
s = [s[0], s[1], s[2], s[3], s[7], s[4], s[5], s[6], s[10], s[11], s[8], s[9], s[13], s[14], s[15], s[12]];
|
||||
for (let j = 0; j < 4; j++) {
|
||||
const tmp = [...s];
|
||||
s[j] = tmp[j] ^ tmp[8 + j] ^ tmp[12 + j];
|
||||
s[4 + j] = tmp[j];
|
||||
s[8 + j] = tmp[4 + j] ^ tmp[8 + j];
|
||||
s[12 + j] = tmp[0 + j] ^ tmp[8 + j];
|
||||
}
|
||||
}
|
||||
return [...Array(16).keys()].map(i => s[i]);
|
||||
}
|
||||
exports.skinnyEncrypt = skinnyEncrypt;
|
||||
//# sourceMappingURL=skinny-128-384-plus.js.map
|
||||
|
|
@ -0,0 +1 @@
|
|||
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|
||||
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Reference in New Issue