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Текущая директория: /usr/lib/node_modules/bitgo/node_modules/expo-crypto/build
Просмотр файла: Crypto.js
import { UnavailabilityError } from 'expo-modules-core';
import { CryptoDigestAlgorithm, CryptoEncoding } from './Crypto.types';
import ExpoCrypto from './ExpoCrypto';
export * from './Crypto.types';
class CryptoError extends TypeError {
code = 'ERR_CRYPTO';
constructor(message) {
super(`expo-crypto: ${message}`);
}
}
function assertAlgorithm(algorithm) {
if (!Object.values(CryptoDigestAlgorithm).includes(algorithm)) {
throw new CryptoError(`Invalid algorithm provided. Expected one of: CryptoDigestAlgorithm.${Object.keys(CryptoDigestAlgorithm).join(', AlgCryptoDigestAlgorithmorithm.')}`);
}
}
function assertData(data) {
if (typeof data !== 'string') {
throw new CryptoError(`Invalid data provided. Expected a string.`);
}
}
function assertEncoding(encoding) {
if (!Object.values(CryptoEncoding).includes(encoding)) {
throw new CryptoError(`Invalid encoding provided. Expected one of: CryptoEncoding.${Object.keys(CryptoEncoding).join(', CryptoEncoding.')}`);
}
}
// @needsAudit
/**
* The `digestStringAsync()` method of `Crypto` generates a digest of the supplied `data` string with the provided digest `algorithm`.
* A digest is a short fixed-length value derived from some variable-length input. **Cryptographic digests** should exhibit _collision-resistance_,
* meaning that it's very difficult to generate multiple inputs that have equal digest values.
* You can specify the returned string format as one of `CryptoEncoding`. By default, the resolved value will be formatted as a `HEX` string.
* On web, this method can only be called from a secure origin (https) otherwise an error will be thrown.
*
* @param algorithm The cryptographic hash function to use to transform a block of data into a fixed-size output.
* @param data The value that will be used to generate a digest.
* @param options Format of the digest string. Defaults to: `CryptoDigestOptions.HEX`.
* @return Return a Promise which fulfills with a value representing the hashed input.
*
* @example
* ```ts
* const digest = await Crypto.digestStringAsync(
* Crypto.CryptoDigestAlgorithm.SHA512,
* '🥓 Easy to Digest! 💙'
* );
* ```
*/
export async function digestStringAsync(algorithm, data, options = { encoding: CryptoEncoding.HEX }) {
if (!ExpoCrypto.digestStringAsync) {
throw new UnavailabilityError('expo-crypto', 'digestStringAsync');
}
assertAlgorithm(algorithm);
assertData(data);
assertEncoding(options.encoding);
return await ExpoCrypto.digestStringAsync(algorithm, data, options);
}
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