Online SHA1 Hash Generator

I have a running C# app with user authentication. I encrypt the passwords with the SHA1Managed class using Encoding.Unicode. Now, we are developing a new PHP web app and it seems that PHP sha1 method uses ASCII, so the encrypted passwords are slightly different.

I cannot change my C# code as it is running in a number of different servers and all user passwords are already encrypted. This cannot be changed as it would imply asking all users their passwords (which is not viable).

I have read the following solutions, however I am not able to solve my problem with them:

1. C# SHA-1 vs. PHP SHA-1...Different Results? In this one they suggest using ASCIIEncoding. However, as I stated before, this cannot be changed.
2. SHA1: different results for PHP and C# and Generate a PHP UTF-16 SHA1 hash to match C# method these one use base64 encoding, and that is not compatible with my C# encoding (I think)
3. php equivalent to following sha1 encryption c# code this one also uses ASCIIEncoding.

This is my C# code which CANNOT be changed:

byte[] msgBytes = Encoding.Unicode.GetBytes(data);SHA1Managed sha1 = new SHA1Managed();byte[] hashBytes = sha1.ComputeHash(msgBytes);StringBuilder hashRet = new StringBuilder("");foreach (byte b in hashBytes)    hashRet.AppendFormat("{0:X}", b);return hashRet.ToString();

This is the PHP code implemented so far:

$str=mb_convert_encoding($password.$SALT, 'UTF-16LE');$result=strtoupper(sha1($str));

The result obtained for an example string "1981" in C#D4CEDCADB729F37C30EBF41BC8F2929AF526AD3

In PHP I get:D4CEDCADB729F37C30EBF41BC8F29209AF526AD3

As can be seen, the only difference between each one is the 0 (zero) char. This happens in all strings, but the 0 appears in different locations.

EDIT

As https://stackoverflow.com/users/1839439/dharman stated, results can't be reproduced exactly as my string has a SALT. However, the results should be different even without the SALT.

SOLUTIONA user gave a suggestion which solved my problem. Unfortunately, he deleted the answer before I could post that it worked. The problem is in C# when I am parsing the bytes to string in the StringBuilder. The format is {0:X} and any leading 0 in the byte is ignored. For example a 01 would be parsed to 1, a 0D would be parsed to D.

Therefore, I had to iterate over pairs of the result obtained in PHP, and remove leading zeros in there.

The final code in PHP is the following:

$str=mb_convert_encoding($password.$SALT, 'UTF-16LE');$result=strtoupper(sha1($str));$array = str_split($result, 2);foreach ($array as &$valor) {    $valor = ltrim($valor, '0');}unset($valor);$result = implode($array);

In objective-c it looks like this:

#include <sys/xattr.h>@implementation NSString (reverse)-(NSString*)sha1{    NSData *data = [self dataUsingEncoding:NSUTF8StringEncoding];    uint8_t digest[CC_SHA1_DIGEST_LENGTH];    CC_SHA1(data.bytes, (int)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;}@end

I need something like this with Swift, is it possible?

Please, show work example.

I need to RSA sign some data using a combination of the MD5 and SHA1 hashes. I can easily do this for just one or the other but having a combination makes it tricky. It's for the certificate verify message in DTLS 1.0, so it's not like I can just choose to do just one unfortunately.

I believe the steps to be to hash in MD5, then hash in SHA1 and concatenate. Then I need to encrypt with the private key. That's where I'm stuck.

I have an RSACryptoServiceProvider that has the proper private key (it's not exportable). I know I cannot do

rsa.SignHash(hash, HashAlgorithmName.SHA1, RSASignaturePadding.Pkcs1);

because it's not just a SHA1 hash so this function sees the hash as invalid since it's 36 bytes instead of 20 bytes as expected.

I also know I cannot do

rsa.SignData(hash, HashAlgorithmName.SHA1, RSASignaturePadding.Pkcs1);

because that's going to hash again.

I believe I'm closer with

rsa.Encrypt(hash, RSAEncryptionPadding.Pkcs1);

however that's using the public key instead of the private key like I need.

Any suggests on how I can either encrypt with the private key or do the signing with MD5+SHA1?

I am obtaining a Google Play API key from Google, and it is asking to enter SHA1 fingerprint. I want to know what is SHA1 fingerprint? I also wanted to know weather this API key can be used from another computer/pc?

An SHA-1 code is readily available thru net but in the case of aforgotten password, how can a hashed one be reversed given this code?

please see link for SHA1 Code