62 lines
1.5 KiB
TypeScript
62 lines
1.5 KiB
TypeScript
import crypto from "crypto";
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export class ShaCrypto {
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/**
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* Returns size of the hash algorithm in bits
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* @param algorithm Hash algorithm
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* @throws Throws Error if an unrecognized name
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*/
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public static size(algorithm: Algorithm) {
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switch (algorithm.name.toUpperCase()) {
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case "SHA-1":
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return 160;
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case "SHA-256":
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case "SHA3-256":
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return 256;
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case "SHA-384":
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case "SHA3-384":
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return 384;
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case "SHA-512":
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case "SHA3-512":
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return 512;
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default:
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throw new Error("Unrecognized name");
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}
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}
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/**
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* Returns NodeJS Crypto algorithm name from WebCrypto algorithm
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* @param algorithm WebCRypto algorithm
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* @throws Throws Error if an unrecognized name
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*/
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public static getAlgorithmName(algorithm: Algorithm): string {
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switch (algorithm.name.toUpperCase()) {
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case "SHA-1":
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return "sha1";
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case "SHA-256":
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return "sha256";
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case "SHA-384":
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return "sha384";
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case "SHA-512":
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return "sha512";
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case "SHA3-256":
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return "sha3-256";
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case "SHA3-384":
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return "sha3-384";
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case "SHA3-512":
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return "sha3-512";
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default:
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throw new Error("Unrecognized name");
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}
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}
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public static digest(algorithm: Algorithm, data: ArrayBuffer) {
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const hashAlg = this.getAlgorithmName(algorithm);
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const hash = crypto.createHash(hashAlg)
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.update(Buffer.from(data)).digest();
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return new Uint8Array(hash).buffer;
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}
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}
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