The implementation of crypto.createCipher() derives keys using the OpenSSL function EVP_BytesToKey with the digest algorithm set to MD5, one iteration, and no salt. The lack of salt allows dictionary attacks as the same password always creates the same key. The low iteration count and non-cryptographically secure hash algorithm allow passwords to be tested very rapidly.
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An exception is thrown when key derivation fails, otherwise the derived key is returned as a Buffer. const { scryptSync } = await import('crypto'); // Using the factory defaults. const key1 = scryptSync('password', 'salt', 64); console.log(key1.toString('hex')); // '3745e48...08d59ae' // Using a custom N parameter. Must be a power of two. const key2 = scryptSync('password', 'salt', 64, { N: 1024 }); console.log(key2.toString('hex')); // '3745e48...aa39b34'const { scryptSync, } = require('crypto'); // Using the factory defaults. const key1 = scryptSync('password', 'salt', 64); console.log(key1.toString('hex')); // '3745e48...08d59ae' // Using a custom N parameter. Must be a power of two. const key2 = scryptSync('password', 'salt', 64, { N: 1024 }); console.log(key2.toString('hex')); // '3745e48...aa39b34' crypto.secureHeapUsed()# Returns: