MD5 IOS

#import <CommonCrypto/CommonDigest.h>

+(NSString*)md5:(NSString *)str

{

    const char *cStr = [str UTF8String];

    unsigned char result[CC_MD5_DIGEST_LENGTH];

    CC_MD5(cStr, (CC_LONG)strlen(cStr), result);

    NSMutableString *hash = [NSMutableString string];

    for (int i = 0; i < CC_MD5_DIGEST_LENGTH; i++)

        [hash appendFormat:@"%02X", result[i]];

    return [hash lowercaseString];

}