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export function isSubtleCryptoAvailable(): boolean {
return typeof crypto !== 'undefined' && typeof crypto.subtle !== 'undefined'
}
export function isNodeCryptoAvailable<T>(
withFeature: (nodeCrypto: typeof import('crypto')) => boolean | T
): false | T
export function isNodeCryptoAvailable<T>(
withFeature?: (nodeCrypto: typeof import('crypto')) => boolean | T
): boolean | T {
try {
const resolvedResult = require.resolve('crypto')
Iif (!resolvedResult) {
return false
}
// eslint-disable-next-line import/no-nodejs-modules,no-restricted-modules,global-require
const cryptoModule = require('crypto') as typeof import('crypto')
Iif (!cryptoModule) {
return false
}
Eif (withFeature) {
const features = withFeature(cryptoModule)
return features
}
return true
} catch (error) {
return false
}
}
export const NO_CRYPTO_LIB = 'Crypto lib not found. Either the WebCrypto "crypto.subtle" or Node.js "crypto" module must be available.'
export type TriplesecDecryptSignature = (
arg: { data: Buffer; key: Buffer }, cb: (err: Error | null, buff: Buffer | null) => void
) => void
export interface WebCryptoLib {
lib: SubtleCrypto;
name: 'subtleCrypto'
}
export interface NodeCryptoLib {
lib: typeof import('crypto');
name: 'nodeCrypto'
}
// Make async for future version which may lazy load.
// eslint-disable-next-line @typescript-eslint/require-await
export async function getCryptoLib(): Promise<WebCryptoLib | NodeCryptoLib> {
if (isSubtleCryptoAvailable()) {
return {
lib: crypto.subtle,
name: 'subtleCrypto'
}
} else {
try {
// eslint-disable-next-line max-len
// eslint-disable-next-line import/no-nodejs-modules,no-restricted-modules,global-require,@typescript-eslint/no-var-requires
const nodeCrypto = require('crypto') as typeof import('crypto')
return {
lib: nodeCrypto,
name: 'nodeCrypto'
}
} catch (error) {
throw new Error(NO_CRYPTO_LIB)
}
}
}
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