如何在Objective C中实现laravel function Crypt :: encrypt()? [英] How to implement laravel function Crypt::encrypt() in Objective C?
问题描述
我需要从 laravel 执行 Crypt :: ecrypt('123456'); 到 Objective C iOS 。所以首先我将这种加密的Laravel方法扩展为纯php:
I need to implement Crypt::ecrypt('123456'); from laravel to Objective C iOS. So first i expanded laravel method for encryption like this to pure php:
public function enc($text,$key)
{
$key = (string)base64_decode($key);
$iv = random_bytes(16);
$value = \openssl_encrypt(serialize($text), 'AES-256-CBC', $key, 0, $iv);
$bIv = base64_encode($iv);
$mac = hash_hmac('sha256', $bIv.$value, $key);
$c_arr = ['iv'=>$bIv,'value'=>$value,'mac'=>$mac];
$json = json_encode($c_arr);
$crypted = base64_encode($json);
return $crypted;
}
https://github.com/reza-khalafi/LaravelCrypt/blob/master/laravelEncrypt.php
然后将该代码的每一行都逐步转换为客观c。观看我的目标c代码:
And then convert every line of this code to objective c step by step. watch my objective c code:
#import <CommonCrypto/CommonHMAC.h>
#import <CommonCrypto/CommonCryptor.h>
// First convert Base64 strings to data
NSString *stringIn = @"123456";
NSString *ser = [NSString stringWithFormat:@"s:%lu:\"%@\";",(unsigned long)stringIn.length,stringIn];
NSData *dataIn = [ser dataUsingEncoding:NSUTF8StringEncoding];
//Make iv
uint8_t randomBytes[16];
NSMutableString *ivStr;
int result = SecRandomCopyBytes(kSecRandomDefault, 16, randomBytes);
if(result == 0) {
ivStr = [[NSMutableString alloc] initWithCapacity:16];
for(NSInteger index = 0; index < 8; index++)
{
[ivStr appendFormat: @"%02x", randomBytes[index]];
}
NSLog(@"uuidStringReplacement is %@", ivStr);
} else {
NSLog(@"SecRandomCopyBytes failed for some reason");
}
NSData *iv = [[NSData alloc] initWithBase64EncodedString:ivStr options:0];
//Iv base 64
NSString *bIV = [[ivStr dataUsingEncoding:NSUTF8StringEncoding] base64EncodedStringWithOptions:0];
//Key
NSString *key = @"9OsNt7h7vjhvOwzXLfdQQYcHxYTua1Fk";
NSData *decodedKeyData = [[NSData alloc] initWithBase64EncodedString:key options:0];
NSString *keyStr = [[NSString alloc] initWithData:decodedKeyData encoding:NSISOLatin1StringEncoding];
//Encryption
size_t encryptBytes = 0;
NSMutableData *encrypted = [NSMutableData dataWithLength:ser.length + kCCBlockSizeAES128];
CCCrypt(
kCCEncrypt,
kCCAlgorithmAES128,
kCCOptionPKCS7Padding, //CBC is the default mode
decodedKeyData.bytes,
kCCKeySizeAES128,
iv.bytes,
dataIn.bytes,
dataIn.length,
encrypted.mutableBytes,
encrypted.length,
&encryptBytes
);
encrypted.length = encryptBytes;
NSLog(@"encrypted hex: %@", encrypted);
NSString *encStr = [encrypted base64EncodedStringWithOptions:0];
NSLog(@"encrypted Base64: %@", encStr);
//Combine two string
NSString *mixStr = [NSString stringWithFormat:@"%@%@",bIV,encStr];
//cHMAC
const char *cKey = [keyStr cStringUsingEncoding:NSISOLatin1StringEncoding];
const char *cData = [mixStr cStringUsingEncoding:NSASCIIStringEncoding];
unsigned char cHMAC[CC_SHA256_DIGEST_LENGTH];
CCHmac(kCCHmacAlgSHA256, cKey, strlen(cKey), cData, strlen(cData), cHMAC);
NSMutableString *mac = [NSMutableString string];
for (int i=0; i<sizeof cHMAC; i++){
[mac appendFormat:@"%02hhx", cHMAC[i]];
}
//Make dictionary
NSDictionary *dic = @{@"iv":bIV,@"value":encStr,@"mac":mac};
//Json
NSError * err;
NSData * jsonData = [NSJSONSerialization dataWithJSONObject:dic options:0 error:&err];
NSString * myString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
//Result
NSString *lastEnc = [[myString dataUsingEncoding:NSUTF8StringEncoding] base64EncodedStringWithOptions:0];
NSLog(@"%@ %lu",lastEnc,(unsigned long)lastEnc.length);
代码结果包含192或188个字符的字符串,没关系。但是在目的地使用此代码时,响应会显示错误:
Code result contain string with 192 or 188 char and that is ok. but when using this code in destination, response show me an error:
Could not decrypt the data.
我更改了一些代码,并测试了这种方法。所有的功能是正确的,但我认为 CCCrypt 不符合 openssl_encrypt 。因为当我从php获取 openssl_encrypt 的结果,并将其设置为 encStr 时,总结果正常工作。
I changes some code, and test this methods. all of the function is correct but i think CCCrypt not match with openssl_encrypt. because when i get result of openssl_encrypt from php and set it instead of encStr, total result works correctly.
谢谢
推荐答案
已解决 :
最后,我们经过太多时间研究关于 Laravel 加密之后,决定自己创建。 LaraCrypt 解决了问题。尝试这样:
Solved:
Finally we make it after too much time research about Laravel encryption, Decided to create by own. LaraCrypt solved the problem. try this:
pod 'LaraCrypt'
成功。
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