SHA512用于iOS的盐 [英] SHA512 with salt for iOS

问题描述

有没有人有工作的SHA512 iOS实现？代码似乎没有生成与php相同的代码。

 <？php 
 
 $ code = hash（SHA512，'123'。'123'）; 
 echo $ code; 
？> 
  

输出：
263fec58861449aacc1c328a4aff64aff4c62df4a2d50b3f207fa89b6e242c9aa778e7a8baeffef85b6ca6d2e7dc16ff0a760d59c13c238f6bcdc32f8ce9cc62

   - （NSString *）sha512：（NSString *）输入withSalt：（NSString *）salt {
 
 
 const char * cKey = [salt cStringUsingEncoding：NSUTF8StringEncoding]; 
 const char * data = [input cStringUsingEncoding：NSUTF8StringEncoding]; 
 unsigned char digest [CC_SHA512_DIGEST_LENGTH]; 
 CCHmac（kCCHmacAlgSHA512，cKey，strlen（cKey），data，strlen（data），digest）; 
 
 NSString *哈希; 
 
 NSMutableString * output = [NSMutableString stringWithCapacity：CC_SHA512_DIGEST_LENGTH * 2]; 
 
 for（int i = 0; i< CC_SHA512_DIGEST_LENGTH; i ++）
 [输出appendFormat：@％02x，摘要[i]]; 
 hash = output; 
返回哈希; 
  

}

  [self sha512：@123withSalt：@123]; 
  

输出：
3cafe40f92be6ac77d2792b4b267c2da11e3f3087b93bb19c6c5133786984b44

解决方案

您的代码有两个问题：

1. ObjC代码似乎正在计算SHA512 HMAC ，您的PHP代码正在计算一个SHA512 哈希，它们是 2种不同的野兽。据我所知（这不远），相应的PHP代码应该是这样的：

     hash_hmac（'SHA512' '123'，'123'）; 
     




2. 上述的输出还远远超过ObjC代码，即： p>
   
   

     0634fd04380bbaf5069c8c46a74c7d21df7414888d980c27a16d5e262cb8c9059139c212d0926000faf026e483904cefae2f5e9d9bd5f51fbc2ac4c4de518115 
     

   长度为128个字符[512位]，表面上来自SHA512功能的预期长度

Hi is there anyone with a working SHA512 iOS implementation? The code doesn't seem to generate the same one I have on php.

<?php

$code =  hash("SHA512", '123' . '123' );
echo $code;
?>

Output: 263fec58861449aacc1c328a4aff64aff4c62df4a2d50b3f207fa89b6e242c9aa778e7a8baeffef85b6ca6d2e7dc16ff0a760d59c13c238f6bcdc32f8ce9cc62

- (NSString *) sha512:(NSString *) input withSalt: (NSString *) salt {


const char *cKey  = [salt cStringUsingEncoding:NSUTF8StringEncoding];
const char *data = [input cStringUsingEncoding:NSUTF8StringEncoding];
unsigned char digest[CC_SHA512_DIGEST_LENGTH];
CCHmac(kCCHmacAlgSHA512, cKey, strlen(cKey), data, strlen(data), digest);

NSString *hash;

NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA512_DIGEST_LENGTH * 2];

for(int i = 0; i < CC_SHA512_DIGEST_LENGTH; i++)
    [output appendFormat:@"%02x", digest[i]];
hash = output;
return hash;

}

[self sha512:@"123" withSalt:@"123"];

Output: 3cafe40f92be6ac77d2792b4b267c2da11e3f3087b93bb19c6c5133786984b44

解决方案

Your code has two problems:

1. Your ObjC code appears to be calculating a SHA512 HMAC and your PHP code is calculating a SHA512 hash which are 2 different beasts. As far as I know [which is not far] the corresponding PHP code should be something like:

   hash_hmac('SHA512', '123',  '123' );
   

2. The output for the above is still much longer that the ObjC code, ie:

   0634fd04380bbaf5069c8c46a74c7d21df7414888d980c27a16d5e262cb8c9059139c212d0926000faf026e483904cefae2f5e9d9bd5f51fbc2ac4c4de518115
   

   Which is 128 characters [512 bits] long and ostensibly the expected length from SHA512 function.

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