MD5 implementation

[Casper Hornstrup]

I need to use MD5 to generate a hash of a string. It needs to be
compatible with the MD5 implementation in PHP.

public string ComputeMD5(string plain)
{
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
byte[] bMD5Hash = Encoding.ASCII.GetBytes(plain);
return Encoding.ASCII.GetString(md5.ComputeHash(bMD5Hash));
//return Convert.ToBase64String(md5.ComputeHash(bMD5Hash));
}


With PHP I get:
md5('test1test1test1test1test1test1') = '0b2fc97f2a37500552d805c4727295a8'

In .NET I get:
ComputeMD5('test1test1test1test1test1test1') = '/I*7PRXDrr('
ComputeMD5('test1test1test1test1test1test1') = 'Cy/Jfyo3UAVS2AXEcnKVqA=='
(base64)

Am I doing it wrong or are the PHP and .NET implementations not compatible?

Thanks in advance,
Casper Hornstrup

 

[Hernan de Lahitte]

Hi,

If you compare both hashes in the same encoding (the PHP version is in
Hexadecimal and the .NET version is in base64 or binary.), they will match.

 

[Casper Hornstrup]

Thanks for you answer.
How do I get a string in the .NET version that I can compare to the PHP
generated string and have a match?

Casper

Hi,

If you compare both hashes in the same encoding (the PHP version is in
Hexadecimal and the .NET version is in base64 or binary.), they will match.

--
Hernan de Lahitte
Lagash Systems S.A.
http://www.lagash.com

I need to use MD5 to generate a hash of a string. It needs to be
compatible with the MD5 implementation in PHP.

public string ComputeMD5(string plain)
{
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
byte[] bMD5Hash = Encoding.ASCII.GetBytes(plain);
return Encoding.ASCII.GetString(md5.ComputeHash(bMD5Hash));
//return Convert.ToBase64String(md5.ComputeHash(bMD5Hash));
}


With PHP I get:
md5('test1test1test1test1test1test1') = '0b2fc97f2a37500552d805c4727295a8'

In .NET I get:
ComputeMD5('test1test1test1test1test1test1') = ' /I*7PRXDrr('
ComputeMD5('test1test1test1test1test1test1') = 'Cy/Jfyo3UAVS2AXEcnKVqA=='
(base64)

Am I doing it wrong or are the PHP and .NET implementations not compatible?

Thanks in advance,
Casper Hornstrup

 

[Hernan de Lahitte]

This code will encode in Hexa your hashed byte array.

public static string EncodeHexString(byte[] sArray)
{
StringBuilder sb = new StringBuilder( sArray.Length * 2 );
for(int index = 0; index < sArray.Length; index++)
{
sb.AppendFormat( "{0:X2}", sArray[index] );
}
return sb.ToString();
}

--
Hernan de Lahitte
Lagash Systems S.A.
http://www.lagash.com

Thanks for you answer.
How do I get a string in the .NET version that I can compare to the PHP
generated string and have a match?

Casper

Hi,

If you compare both hashes in the same encoding (the PHP version is in
Hexadecimal and the .NET version is in base64 or binary.), they will match.

--
Hernan de Lahitte
Lagash Systems S.A.
http://www.lagash.com

I need to use MD5 to generate a hash of a string. It needs to be
compatible with the MD5 implementation in PHP.

public string ComputeMD5(string plain)
{
MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
byte[] bMD5Hash = Encoding.ASCII.GetBytes(plain);
return Encoding.ASCII.GetString(md5.ComputeHash(bMD5Hash));
//return Convert.ToBase64String(md5.ComputeHash(bMD5Hash));
}


With PHP I get:
md5('test1test1test1test1test1test1') = '0b2fc97f2a37500552d805c4727295a8'

In .NET I get:
ComputeMD5('test1test1test1test1test1test1') = ' /I*7PRXDrr('
ComputeMD5('test1test1test1test1test1test1') = 'Cy/Jfyo3UAVS2AXEcnKVqA=='
(base64)

Am I doing it wrong or are the PHP and .NET implementations not compatible?

Thanks in advance,
Casper Hornstrup