hash a password string using SHA512 like C#

Question

I am developing logon function for my iPhone Application, so I want to hash the password using the SHA512 hashing algorithm then get the result as NSString (the result should be the same with SHA512 in C#). After spending a lot of time in the internet, I still not find out the solution yet! :(

Is there anyone has the solution and sample code, please help me! Thanks a lot!

[Update] In my C# code, the password is stored using SecureString, so maybe it's cause make different byte array between objective-c and C#

Answer 1

This function will hash a string using SHA512. The resulting string is a hex representation of the hash:

+ (NSString *) createSHA512:(NSString *)source {      const char *s = [source cStringUsingEncoding:NSASCIIStringEncoding];      NSData *keyData = [NSData dataWithBytes:s length:strlen(s)];      uint8_t digest[CC_SHA512_DIGEST_LENGTH] = {0};      CC_SHA512(keyData.bytes, keyData.length, digest);      NSData *out = [NSData dataWithBytes:digest length:CC_SHA512_DIGEST_LENGTH];      return [out description]; } 

Don't forget to include the correct header:

#include <CommonCrypto/CommonDigest.h> 

Answer 2

I am using this one.

It matches PHP SHA512 algorithm output:

<?php `hash('sha512', 'The quick brown fox jumped over the lazy dog.');` ?> 

Objective-C code:

+(NSString *)createSHA512:(NSString *)string {     const char *cstr = [string cStringUsingEncoding:NSUTF8StringEncoding];     NSData *data = [NSData dataWithBytes:cstr length:string.length];     uint8_t digest[CC_SHA512_DIGEST_LENGTH];     CC_SHA512(data.bytes, data.length, digest);     NSMutableString* output = [NSMutableString  stringWithCapacity:CC_SHA512_DIGEST_LENGTH * 2];      for(int i = 0; i < CC_SHA512_DIGEST_LENGTH; i++)         [output appendFormat:@"%02x", digest[i]];     return output; }