我正在尝试使用公钥对 NSData 进行 RSA 加密。公钥格式如下:
<RSAKeyValue>
<Modulus>yOTe0L1/NcbXdZYwliS82MiTE8VD5WD23S4RDsdbJOFzCLbsyb4d+K1M5fC+xDfCkji1zQjPiiiToZ7JSj/2ww==</Modulus>
<Exponent>AWAB</Exponent>
</RSAKeyValue>
从 XML 字符串中提取模数和指数后,我如何从下面的方法中获取SecKeyRef
要使用的模数和指数publicKey
?
+ (NSString *)encryptRSA:(NSString *)plainTextString key:(SecKeyRef)publicKey
{
size_t cipherBufferSize = SecKeyGetBlockSize(publicKey);
uint8_t *cipherBuffer = malloc(cipherBufferSize);
uint8_t *nonce = (uint8_t *)[plainTextString UTF8String];
SecKeyEncrypt(publicKey,
kSecPaddingOAEP,
nonce,
strlen( (char*)nonce ),
&cipherBuffer[0],
&cipherBufferSize);
NSData *encryptedData = [NSData dataWithBytes:cipherBuffer length:cipherBufferSize];
return [encryptedData base64EncodedString];
}
我似乎无法在任何地方找到明确的答案。