MD5 and SHA-1 Hashing (for String and Files)

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Introduction

This Page deals provides an Example code to show how to implement the .NET MD5 and SHA-1 cryptography Class.

In order to use the MD5 or SHA-1 Class that .NET provides, u must realize that it accepts and returns byte arrays only.

public byte[] ComputeHash ( byte[] buffer , System.Int32 offset , System.Int32 count )
//or public byte[] ComputeHash ( byte[] buffer)
//buffer is the string represented in bytes

this means that u have to convert the string to a byte array, send it to the function and prepare to convert the result byte array back to string.

this was done using this code i found here on code project:

public string encryptString(byte[] RawStringBytes)
{
    /// <summary>
    /// converts the MD5 of SHA-1 result byte[] to a string 
representative
    /// </summary>
    string hashString ="";
    for(int i=0;i<RawStringBytes.Length;i++)
    {
        hashString += Convert.ToString(RawStringBytes[i], 16).PadLeft(2,'0');
    }
    return hashString.PadLeft(32,'0');
}

just download and examine the c# coding for more details on how it works.