ba1fa82285ac1dfccf28f9e15de378927f19f3f721873bfeab9ea552c6835ccc.json raw

   1  {"ast":null,"code":"import { SHA2 } from './_sha2.js';\nimport { rotr, wrapConstructor } from './utils.js';\n// Choice: a ? b : c\nconst Chi = (a, b, c) => a & b ^ ~a & c;\n// Majority function, true if any two inpust is true\nconst Maj = (a, b, c) => a & b ^ a & c ^ b & c;\n// Round constants:\n// first 32 bits of the fractional parts of the cube roots of the first 64 primes 2..311)\n// prettier-ignore\nconst SHA256_K = new Uint32Array([0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2]);\n// Initial state (first 32 bits of the fractional parts of the square roots of the first 8 primes 2..19):\n// prettier-ignore\nconst IV = new Uint32Array([0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19]);\n// Temporary buffer, not used to store anything between runs\n// Named this way because it matches specification.\nconst SHA256_W = new Uint32Array(64);\nclass SHA256 extends SHA2 {\n  constructor() {\n    super(64, 32, 8, false);\n    // We cannot use array here since array allows indexing by variable\n    // which means optimizer/compiler cannot use registers.\n    this.A = IV[0] | 0;\n    this.B = IV[1] | 0;\n    this.C = IV[2] | 0;\n    this.D = IV[3] | 0;\n    this.E = IV[4] | 0;\n    this.F = IV[5] | 0;\n    this.G = IV[6] | 0;\n    this.H = IV[7] | 0;\n  }\n  get() {\n    const {\n      A,\n      B,\n      C,\n      D,\n      E,\n      F,\n      G,\n      H\n    } = this;\n    return [A, B, C, D, E, F, G, H];\n  }\n  // prettier-ignore\n  set(A, B, C, D, E, F, G, H) {\n    this.A = A | 0;\n    this.B = B | 0;\n    this.C = C | 0;\n    this.D = D | 0;\n    this.E = E | 0;\n    this.F = F | 0;\n    this.G = G | 0;\n    this.H = H | 0;\n  }\n  process(view, offset) {\n    // Extend the first 16 words into the remaining 48 words w[16..63] of the message schedule array\n    for (let i = 0; i < 16; i++, offset += 4) SHA256_W[i] = view.getUint32(offset, false);\n    for (let i = 16; i < 64; i++) {\n      const W15 = SHA256_W[i - 15];\n      const W2 = SHA256_W[i - 2];\n      const s0 = rotr(W15, 7) ^ rotr(W15, 18) ^ W15 >>> 3;\n      const s1 = rotr(W2, 17) ^ rotr(W2, 19) ^ W2 >>> 10;\n      SHA256_W[i] = s1 + SHA256_W[i - 7] + s0 + SHA256_W[i - 16] | 0;\n    }\n    // Compression function main loop, 64 rounds\n    let {\n      A,\n      B,\n      C,\n      D,\n      E,\n      F,\n      G,\n      H\n    } = this;\n    for (let i = 0; i < 64; i++) {\n      const sigma1 = rotr(E, 6) ^ rotr(E, 11) ^ rotr(E, 25);\n      const T1 = H + sigma1 + Chi(E, F, G) + SHA256_K[i] + SHA256_W[i] | 0;\n      const sigma0 = rotr(A, 2) ^ rotr(A, 13) ^ rotr(A, 22);\n      const T2 = sigma0 + Maj(A, B, C) | 0;\n      H = G;\n      G = F;\n      F = E;\n      E = D + T1 | 0;\n      D = C;\n      C = B;\n      B = A;\n      A = T1 + T2 | 0;\n    }\n    // Add the compressed chunk to the current hash value\n    A = A + this.A | 0;\n    B = B + this.B | 0;\n    C = C + this.C | 0;\n    D = D + this.D | 0;\n    E = E + this.E | 0;\n    F = F + this.F | 0;\n    G = G + this.G | 0;\n    H = H + this.H | 0;\n    this.set(A, B, C, D, E, F, G, H);\n  }\n  roundClean() {\n    SHA256_W.fill(0);\n  }\n  destroy() {\n    this.set(0, 0, 0, 0, 0, 0, 0, 0);\n    this.buffer.fill(0);\n  }\n}\n// Constants from https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf\nclass SHA224 extends SHA256 {\n  constructor() {\n    super();\n    this.A = 0xc1059ed8 | 0;\n    this.B = 0x367cd507 | 0;\n    this.C = 0x3070dd17 | 0;\n    this.D = 0xf70e5939 | 0;\n    this.E = 0xffc00b31 | 0;\n    this.F = 0x68581511 | 0;\n    this.G = 0x64f98fa7 | 0;\n    this.H = 0xbefa4fa4 | 0;\n    this.outputLen = 28;\n  }\n}\n/**\n * SHA2-256 hash function\n * @param message - data that would be hashed\n */\nexport const sha256 = wrapConstructor(() => new SHA256());\nexport const sha224 = wrapConstructor(() => new SHA224());\n//# sourceMappingURL=sha256.js.map","map":null,"metadata":{},"sourceType":"module","externalDependencies":[]}