온라인 MD5 해시 생성기

We are trying to migrate our user management to Amazon Cognito. In this process, we need to import the existing users in our database to Cognito.

We have the md5 hashed passwords associated with the users. I just want to confirm if we can make use of them to set the passwords to the imported users in Cognito.

To be clear instead of sending a plain text password in API request can I send the md5 of the password?

Any Help is appreciated.

Thanks in Advance.

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 want to make the following but i don't know how to start to do this what i want is.

1. checks if md5 was copied

2. then clears the clipboard

3. loop that checks if the clipboard is still empty, and after that the notification copy what you want to hash to md5

4. code that does the hash after the clipboard is non-empty, and after all show a notification of the md5 hash what was copied.

this is my code for now

        switch ((clipboardText))        {            case "md5":                ShowNotification("MD5 HASHER", "Copy what you want to hash to md5");                {                    ClearClipboard();                    string input = GetTextClipboard();                    // step 1, calculate MD5 hash from input                    MD5 md5 = MD5.Create();                    byte[] inputBytes = System.Text.Encoding.ASCII.GetBytes(input);                    byte[] hash = md5.ComputeHash(inputBytes);                    // step 2, convert byte array to hex string                    StringBuilder sb = new StringBuilder();                    for (int i = 0; i < hash.Length; i++)                    {                        sb.Append(hash[i].ToString("X2"));                    }                    ShowNotification("md5 hash", sb.ToString());                }                break;        }

In Swift 4 we could use

var md5: String? {    guard let data = self.data(using: .utf8) else { return nil }    let hash = data.withUnsafeBytes { (bytes: UnsafePointer<Data>) -> [UInt8] in        var hash: [UInt8] = [UInt8](repeating: 0, count: Int(CC_MD5_DIGEST_LENGTH))        CC_MD5(bytes, CC_LONG(data.count), &hash)        return hash    }    return hash.map { String(format: "%02x", $0) }.joined()}

But in Swift 5 withUnsafeBytes uses UnsafeRawBufferPointer instead of UnsafePointer. How to change md5 function?

Does the MD5 algorithm always generate the same output for the same string?

Is using a salt the only to produce different output?