On Leopard, you can use CC_MD5 function to produce MD5 hashed data. Here is a code snippet which computes MD5 from NSString.
#import <CommonCrypto/CommonDigest.h> // contains declaration of CC_MD5 NSString *testString = @"Test"; // String data that needs md5 checksum const char *test_cstr = [testString UTF8String]; // Get data as C language string. unsigned char md5_result[CC_MD5_DIGEST_LENGTH]; // storage for checksum result CC_MD5(test_cstr, strlen(test_cstr), md5_result); // do calculation
If you want hexadecimal representation of the checksum as NSString, use stringWithFormat(taken from CocoaDev: MDFive).
NSString *hex_str = [NSString stringWithFormat: @"%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X", md5_result[0], md5_result[1], md5_result[2], md5_result[3], md5_result[4], md5_result[5], md5_result[6], md5_result[7], md5_result[8], md5_result[9], md5_result[10], md5_result[11], md5_result[12], md5_result[13], md5_result[14], md5_result[15]]; NSLog(hex_str);
In case you are not sure if the result is correct or not, compare hexidecimal string with other calculation method.
Try this.
perl -MDigest::MD5=md5_hex -le 'print md5_hex("Test")'
