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我使用RNCryptor成功地在iOS中加密/解密数据。RNCryptor:获取公钥为NSString
我想获得公钥发送到服务器,所以它可以加密一些数据。
NSString *saltString = @"salt'n'peppa";
NSData *salt = [saltString dataUsingEncoding:NSUTF8StringEncoding];
NSData *key = [RNCryptor keyForPassword:password
salt:salt
settings:kRNCryptorAES256Settings.keySettings];
此时,key
中有一些数据。不过,我似乎无法工作,如何将公钥作为一个字符串:
NSString *publicKey = [[NSString alloc] initWithData:key encoding:NSUTF8StringEncoding];
我试过不同的编码,但似乎没有任何工作。
这里是RNCryptor的keyForPassword方法:
+ (NSData *)keyForPassword:(NSString *)password salt:(NSData *)salt settings:(RNCryptorKeyDerivationSettings)keySettings
{
NSMutableData *derivedKey = [NSMutableData dataWithLength:keySettings.keySize];
// See Issue #77. V2 incorrectly calculated key for multi-byte characters.
NSData *passwordData;
if (keySettings.hasV2Password) {
passwordData = [NSData dataWithBytes:[password UTF8String] length:[password length]];
}
else {
passwordData = [password dataUsingEncoding:NSUTF8StringEncoding];
}
// Use the built-in PBKDF2 if it's available. Otherwise, we have our own. Hello crazy function pointer.
int result;
int (*PBKDF)(CCPBKDFAlgorithm algorithm, const char *password, size_t passwordLen,
const uint8_t *salt, size_t saltLen,
CCPseudoRandomAlgorithm prf, uint rounds,
uint8_t *derivedKey, size_t derivedKeyLen);
PBKDF = CCKeyDerivationPBKDF ?: RN_CCKeyDerivationPBKDF;
result = PBKDF(keySettings.PBKDFAlgorithm, // algorithm
passwordData.bytes, // password
passwordData.length, // passwordLength
salt.bytes, // salt
salt.length, // saltLen
keySettings.PRF, // PRF
keySettings.rounds, // rounds
derivedKey.mutableBytes, // derivedKey
derivedKey.length); // derivedKeyLen
// Do not log password here
NSAssert(result == kCCSuccess, @"Unable to create AES key for password: %d", result);
return derivedKey;
}
我得到我做得majorly错误的,因为谷歌搜索的感觉出现很少。
如果服务器运行PHP,您可以通过提供'NSData'对象作为POST数据发送原始字节,然后使用'file_get_contents('php:// input')'在PHP中读取它。这种方式不需要base64编码。 PHP的字符串数据类型比'NSString'更接近'NSData'(尽管这可能会在PHP的未来版本中发生变化......) – 2014-10-02 05:30:17
@maddy非常感谢。这很有道理。 – 2014-10-02 10:45:13
@AbhiBeckert我没有使用PHP,但多数民众赞成知道。我会记住它 – 2014-10-02 10:46:01