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@technobuddha/library

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/* eslint-disable no-bitwise */ import { ch } from "./ch.js"; import { int32 } from "./int-32.js"; import { maj } from "./maj.js"; import { ShaBase } from "./sha-base.js"; /** * Constants used in the SHA-224 and SHA-256 cryptographic hash functions. * * These 32-bit integer values are the first 32 bits of the fractional parts of the cube roots of the first 64 prime numbers. * They are used as round constants in the main compression function of the SHA-2 family of algorithms. * @see [FIPS PUB 180-4, Section 4.2.2](https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf) * @internal */ const K = [ 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, ]; /** * Computes the SHA-224/SHA-256 σ₀ (sigma0) function for a 32-bit integer. * * This function performs a bitwise rotation and XOR combination as defined in the SHA-2 specification: * σ₀(x) = ROTR²(x) ⊕ ROTR¹³(x) ⊕ ROTR²²(x) * @param x - The 32-bit integer input. * @returns The result of applying the σ₀ function to the input. * @internal */ function sigma0(x) { return ((x >>> 2) | (x << 30)) ^ ((x >>> 13) | (x << 19)) ^ ((x >>> 22) | (x << 10)); } /** * Computes the SHA-224/SHA-256 σ₁ (sigma1) function for a 32-bit integer. * * This function performs bitwise right rotations and XORs as defined in the SHA-2 specification: * σ₁(x) = ROTR⁶(x) ⊕ ROTR¹¹(x) ⊕ ROTR²⁵(x) * @param x - The 32-bit integer input. * @returns The result of applying the σ₁ function to the input. * @internal */ function sigma1(x) { return ((x >>> 6) | (x << 26)) ^ ((x >>> 11) | (x << 21)) ^ ((x >>> 25) | (x << 7)); } /** * Computes the SHA-224/SHA-256 σ₀ (gamma0) function for a 32-bit integer. * * This function performs a bitwise rotation and shift, then combines the results using XOR, * as defined in the SHA-2 specification: * σ₀(x) = ROTR⁷(x) ⊕ ROTR¹⁸(x) ⊕ SHR³(x) * @param x - The 32-bit integer input. * @returns The result of the σ₀ transformation. * @internal */ function gamma0(x) { return ((x >>> 7) | (x << 25)) ^ ((x >>> 18) | (x << 14)) ^ (x >>> 3); } /** * Computes the SHA-224/SHA-256 σ₁ (gamma1) function for a 32-bit integer. * * This function performs bitwise operations as defined in the SHA-2 specification: * σ₁(x) = ROTR^17(x) XOR ROTR^19(x) XOR SHR^10(x) * where: * - ROTR^n(x) is the right rotation of x by n bits, * - SHR^n(x) is the right shift of x by n bits. * @param x - The 32-bit integer input. * @returns The result of applying the σ₁ function to the input. * @internal */ function gamma1(x) { return ((x >>> 17) | (x << 15)) ^ ((x >>> 19) | (x << 13)) ^ (x >>> 10); } /** * Secure Hash Algorithm, SHA2 SHA-224 * @example * ```typescript * const sha224 = new Sha224(); * sha224.update('hello world', 'utf8'); * sha224.digest('hex'); * // '23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7' * ``` * ```typescript * const sha224 = new Sha224(); * sha224.update(new Uint8Array([0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x20, 0x77, 0x6f, 0x72, 0x6c, 0x64])); * sha224.digest('hex'); * // '23097d223405d8228642a477bda255b32aadbce4bda0b3f7e36c9da7' * ``` * @group Binary * @category Hash */ export class Sha224 extends ShaBase { a = 0xc1059ed8; b = 0x367cd507; c = 0x3070dd17; d = 0xf70e5939; e = 0xffc00b31; f = 0x68581511; g = 0x64f98fa7; h = 0xbefa4fa4; w; /** * Creates a new SHA-224 hash instance and initializes its internal state. * * @remarks * The internal state variables are set to the initial SHA-224 constants as specified * in FIPS PUB 180-4. Use {@link update} to process data and {@link digest} to retrieve the hash. */ constructor() { super(64, 56); this.w = Array.from({ length: 64 }); } updateCounters(buffer) { const { w } = this; let a = int32(this.a); let b = int32(this.b); let c = int32(this.c); let d = int32(this.d); let e = int32(this.e); let f = int32(this.f); let g = int32(this.g); let h = int32(this.h); let i; for (i = 0; i < 16; ++i) { w[i] = (buffer[i * 4 + 0] << 24) | (buffer[i * 4 + 1] << 16) | (buffer[i * 4 + 2] << 8) | buffer[i * 4 + 3]; } for (; i < 64; ++i) { w[i] = int32(gamma1(w[i - 2]) + w[i - 7] + gamma0(w[i - 15]) + w[i - 16]); } for (let j = 0; j < 64; ++j) { const T1 = int32(h + sigma1(e) + ch(e, f, g) + int32(K[j]) + w[j]); const T2 = int32(sigma0(a) + maj(a, b, c)); h = g; g = f; f = e; e = int32(d + T1); d = c; c = b; b = a; a = int32(T1 + T2); } this.a = int32(a + this.a); this.b = int32(b + this.b); this.c = int32(c + this.c); this.d = int32(d + this.d); this.e = int32(e + this.e); this.f = int32(f + this.f); this.g = int32(g + this.g); this.h = int32(h + this.h); } hash() { return new Uint8Array([ (this.a & 0xff000000) >> 24, (this.a & 0x00ff0000) >> 16, (this.a & 0x0000ff00) >> 8, this.a & 0x000000ff, (this.b & 0xff000000) >> 24, (this.b & 0x00ff0000) >> 16, (this.b & 0x0000ff00) >> 8, this.b & 0x000000ff, (this.c & 0xff000000) >> 24, (this.c & 0x00ff0000) >> 16, (this.c & 0x0000ff00) >> 8, this.c & 0x000000ff, (this.d & 0xff000000) >> 24, (this.d & 0x00ff0000) >> 16, (this.d & 0x0000ff00) >> 8, this.d & 0x000000ff, (this.e & 0xff000000) >> 24, (this.e & 0x00ff0000) >> 16, (this.e & 0x0000ff00) >> 8, this.e & 0x000000ff, (this.f & 0xff000000) >> 24, (this.f & 0x00ff0000) >> 16, (this.f & 0x0000ff00) >> 8, this.f & 0x000000ff, (this.g & 0xff000000) >> 24, (this.g & 0x00ff0000) >> 16, (this.g & 0x0000ff00) >> 8, this.g & 0x000000ff, ]); } } //# 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