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Merge pull request #93 from nibble-4bits/refactor-18
Refactor 18
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,11 @@ | ||
| import { MD5 } from './hash/MD5'; | ||
| import { SHA1 } from './hash/SHA1'; | ||
| import { SHA256 } from './hash/SHA256'; | ||
| import { SHA384 } from './hash/SHA384'; | ||
| import { SHA512 } from './hash/SHA512'; | ||
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| export const md5 = new MD5(); | ||
| export const sha1 = new SHA1(); | ||
| export const sha256 = new SHA256(); | ||
| export const sha384 = new SHA384(); | ||
| export const sha512 = new SHA512(); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| // TypeScript's DOM library has to be referenced for `TextEncoder` to be recognized as a type | ||
| /// <reference lib="dom" /> | ||
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| export abstract class BaseHashAlgorithm { | ||
| private textEncoder: TextEncoder; | ||
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| constructor() { | ||
| this.textEncoder = new TextEncoder(); | ||
| } | ||
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| getDigest(input: string): string { | ||
| const message = this.textEncoder.encode(input); | ||
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| const paddedMessage = this.padMessage(message); | ||
| const hash = this.computeHash(paddedMessage); | ||
| const digest = this.hashToString(hash); | ||
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| return digest; | ||
| } | ||
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| protected abstract padMessage(message: Uint8Array): ArrayBuffer; | ||
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| protected abstract computeHash(paddedMessage: ArrayBuffer): ArrayBuffer; | ||
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| protected abstract hashToString(hash: ArrayBuffer): string; | ||
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| protected rotl(n: number, x: number): number; | ||
| protected rotl(n: bigint, x: bigint): bigint; | ||
| protected rotl(n: number | bigint, x: number | bigint): number | bigint { | ||
| if (typeof n === 'number' && typeof x === 'number') return (x << n) | (x >>> (32 - n)); | ||
| if (typeof n === 'bigint' && typeof x === 'bigint') return (x << n) | (x >> (64n - n)); | ||
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| throw new Error('Both arguments must be of the same type'); | ||
| } | ||
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| protected rotr(n: number, x: number): number; | ||
| protected rotr(n: bigint, x: bigint): bigint; | ||
| protected rotr(n: number | bigint, x: number | bigint): number | bigint { | ||
| if (typeof n === 'number' && typeof x === 'number') return (x >>> n) | (x << (32 - n)); | ||
| if (typeof n === 'bigint' && typeof x === 'bigint') return (x >> n) | (x << (64n - n)); | ||
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| throw new Error('Both arguments must be of the same type'); | ||
| } | ||
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| protected ch(x: number, y: number, z: number): number; | ||
| protected ch(x: bigint, y: bigint, z: bigint): bigint; | ||
| protected ch(x: number | bigint, y: number | bigint, z: number | bigint): number | bigint { | ||
| if (typeof x === typeof y && typeof y === typeof z) { | ||
| // @ts-expect-error TypeScript can't disambiguate between number and bigint | ||
| return (x & y) ^ (~x & z); | ||
| } | ||
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| throw new Error('All arguments must be of the same type'); | ||
| } | ||
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| protected parity(x: number, y: number, z: number): number; | ||
| protected parity(x: bigint, y: bigint, z: bigint): bigint; | ||
| protected parity(x: number | bigint, y: number | bigint, z: number | bigint): number | bigint { | ||
| if (typeof x === typeof y && typeof y === typeof z) { | ||
| // @ts-expect-error TypeScript can't disambiguate between number and bigint | ||
| return x ^ y ^ z; | ||
| } | ||
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| throw new Error('All arguments must be of the same type'); | ||
| } | ||
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| protected maj(x: number, y: number, z: number): number; | ||
| protected maj(x: bigint, y: bigint, z: bigint): bigint; | ||
| protected maj(x: number | bigint, y: number | bigint, z: number | bigint): number | bigint { | ||
| if (typeof x === typeof y && typeof y === typeof z) { | ||
| // @ts-expect-error TypeScript can't disambiguate between number and bigint | ||
| return (x & y) ^ (x & z) ^ (y & z); | ||
| } | ||
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| throw new Error('All arguments must be of the same type'); | ||
| } | ||
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| protected bigSigma0(x: number): number; | ||
| protected bigSigma0(x: bigint): bigint; | ||
| protected bigSigma0(x: number | bigint): number | bigint { | ||
| if (typeof x === 'number') { | ||
| // number version used by SHA1 and SHA256 | ||
| return this.rotr(2, x) ^ this.rotr(13, x) ^ this.rotr(22, x); | ||
| } | ||
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| // BigInt version used by SHA384 and SHA512 | ||
| return this.rotr(28n, x) ^ this.rotr(34n, x) ^ this.rotr(39n, x); | ||
| } | ||
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| protected bigSigma1(x: number): number; | ||
| protected bigSigma1(x: bigint): bigint; | ||
| protected bigSigma1(x: number | bigint): number | bigint { | ||
| if (typeof x === 'number') { | ||
| // number version used by SHA1 and SHA256 | ||
| return this.rotr(6, x) ^ this.rotr(11, x) ^ this.rotr(25, x); | ||
| } | ||
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| // BigInt version used by SHA384 and SHA512 | ||
| return this.rotr(14n, x) ^ this.rotr(18n, x) ^ this.rotr(41n, x); | ||
| } | ||
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| protected smallSigma0(x: number): number; | ||
| protected smallSigma0(x: bigint): bigint; | ||
| protected smallSigma0(x: number | bigint): number | bigint { | ||
| if (typeof x === 'number') { | ||
| // number version used by SHA1 and SHA256 | ||
| return this.rotr(7, x) ^ this.rotr(18, x) ^ (x >>> 3); | ||
| } | ||
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| // BigInt version used by SHA384 and SHA512 | ||
| return this.rotr(1n, x) ^ this.rotr(8n, x) ^ (x >> 7n); | ||
| } | ||
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| protected smallSigma1(x: number): number; | ||
| protected smallSigma1(x: bigint): bigint; | ||
| protected smallSigma1(x: number | bigint): number | bigint { | ||
| if (typeof x === 'number') { | ||
| // number version used by SHA1 and SHA256 | ||
| return this.rotr(17, x) ^ this.rotr(19, x) ^ (x >>> 10); | ||
| } | ||
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| // BigInt version used by SHA384 and SHA512 | ||
| return this.rotr(19n, x) ^ this.rotr(61n, x) ^ (x >> 6n); | ||
| } | ||
| } |
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