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MD5 String Hash

/ Published in: Objective C
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This is a simple md5 implementation.

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  1. #import <CommonCrypto/CommonDigest.h>
  2. #import <Foundation/Foundation.h>
  3.  
  4. @interface Util : NSObject {}
  5. //	generates a unique id from a string
  6. + (NSString *)uniqueIDFromString:(NSString *)source;
  7. @end
  8.  
  9. @implementation Util
  10. //	generates a unique id from a string
  11. + (NSString *)uniqueIDFromString:(NSString *)source
  12. {
  13. 	const char *src = [[source lowercaseString] UTF8String];
  14. 	unsigned char result[CC_MD5_DIGEST_LENGTH];
  15. 	CC_MD5(src, strlen(src), result);
  16.  
  17.     NSString *ret = [[[NSString alloc] initWithFormat:@"%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X", 
  18.                         result[0], result[1], result[2], result[3],
  19.                         result[4], result[5], result[6], result[7],
  20.                         result[8], result[9], result[10], result[11],
  21.                         result[12], result[13], result[14], result[15]
  22.                      ] autorelease];
  23.  
  24.     return ret;
  25. }
  26. @end

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