How to get md5 and SHA1 in objective c (iOS sdk)

Calculating the md5 and sha1 hash in iOS sdk is pretty simple -

Step 1 – The very first thing you need to do is import CommonCrypto’s CommonDigest.h

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#import <CommonCrypto/CommonDigest.h>

Step 2 – Here is the real code for calculating SHA1 and MD5 hash -

SHA1 -

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-(NSString*) sha1:(NSString*)input
{
 const char *cstr = [input cStringUsingEncoding:NSUTF8StringEncoding];
 NSData *data = [NSData dataWithBytes:cstr length:input.length];
 
 uint8_t digest[CC_SHA1_DIGEST_LENGTH];
 
 CC_SHA1(data.bytes, data.length, digest);
 
 NSMutableString* output = [NSMutableString stringWithCapacity:CC_SHA1_DIGEST_LENGTH * 2];
 
 for(int i = 0; i < CC_SHA1_DIGEST_LENGTH; i++)
 [output appendFormat:@"%02x", digest[i]];
 
 return output;
 
}

MD5 -

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- (NSString *) md5:(NSString *) input
{
 const char *cStr = [input UTF8String];
 unsigned char digest[16];
 CC_MD5( cStr, strlen(cStr), digest ); // This is the md5 call
 
 NSMutableString *output = [NSMutableString stringWithCapacity:CC_MD5_DIGEST_LENGTH * 2];
 
 for(int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)
 [output appendFormat:@"%02x", digest[i]];
 
 return  output;
 
}

Hope it will help someone!

posted @ 2014-03-30 19:50  黄伟同学  阅读(205)  评论(0)    收藏  举报