// md5
+(NSString *) md5WithString:(NSString *)input
{
    const char *cStr = [input UTF8String];
    unsigned char digest[16];
    CC_MD5( cStr, strlen(cStr), digest );
 
    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;
}

// md5 +(NSString *) md5WithString:(NSString *)input { const char *cStr = [input UTF8String]; unsigned char digest[16]; CC_MD5( cStr, strlen(cStr), digest ); 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; }

// sha1
+(NSString *) sha1WithString:(NSString *)input
{
    NSData *data = [input dataUsingEncoding:NSUTF8StringEncoding];
 
    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;
}

// sha1 +(NSString *) sha1WithString:(NSString *)input { NSData *data = [input dataUsingEncoding:NSUTF8StringEncoding]; 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; }

// sha2
+(NSString *) sha2WithString:(NSString *)input
{
    NSData *data = [input dataUsingEncoding:NSUTF8StringEncoding];
 
    uint8_t digest[CC_SHA256_DIGEST_LENGTH];
 
    CC_SHA256(data.bytes, data.length, digest);
 
    NSMutableString *output = [NSMutableString stringWithCapacity:CC_SHA256_DIGEST_LENGTH * 2];
 
    for(int i = 0; i < CC_SHA256_DIGEST_LENGTH; i++)
        [output appendFormat:@"%02x", digest[i]];
 
    return output;
}

// sha2 +(NSString *) sha2WithString:(NSString *)input { NSData *data = [input dataUsingEncoding:NSUTF8StringEncoding]; uint8_t digest[CC_SHA256_DIGEST_LENGTH]; CC_SHA256(data.bytes, data.length, digest); NSMutableString *output = [NSMutableString stringWithCapacity:CC_SHA256_DIGEST_LENGTH * 2]; for(int i = 0; i < CC_SHA256_DIGEST_LENGTH; i++) [output appendFormat:@"%02x", digest[i]]; return output; }