我尝试在Android,iOS和JS上使用crypto_kdf_derive_from_key功能。在Android和iOS上,它产生相同的输出,但在JS上不会。上下文、主密钥和大小相同。知道为什么吗?
所有平台在以下使用以下相同的核心功能:crypto_kdf_derive_from_key
.JS:
generateKey(basedOnKey: string): Uint8Array {
const masterKey = this.convertHexToBytes(basedOnKey);
const context = this.textEncoder.encode('AAAAAAAA');
const newKey = sodium.crypto_kdf_derive_from_key(sodium.crypto_secretbox_KEYBYTES, 0, context, masterKey);
return newKey;
}
苹果:
public func getNewSecretKey(basedOn key: String) -> Data? {
let masterKey = key.hexDecodedData().bytes
let context = "AAAAAAAA"
let newKey = sodium.keyDerivation.derive(secretKey: masterKey, index: 0, length: 32, context: context)
return newKey?.data
}
不要转换上下文。假定它是一个字符串。
Frank Denis 建议不要转换上下文,即:
generateKey(basedOnKey: string): Uint8Array {
const masterKey = this.convertHexToBytes(basedOnKey);
const context = 'AAAAAAAA';
const newKey = sodium.crypto_kdf_derive_from_key(sodium.crypto_secretbox_KEYBYTES, 0, context, masterKey);
return newKey;
}
现在一切正常!