.NET Micro Framework

I know there are more SHA classes arround for C# but I needed a class that I could incorporate in a program without licence/copyright problems so I’ve written my own class from scratch.

The class supports SHA-1, SHA-224 and SSH-256. The HMAC versions with key are also supported. The comments in the code are the same as the pseudocode found on the Wikipedia page about SHA helping to understand what the code is doing.

Demo code:

// Outputs: SHA-1: 6CD1F13BA07759CCB56D904C02C5509FCDEC30E2
Debug.Print(”SHA-1: ” + HexDisplay.bytesToHex(SHA.computeSHA1(
 Encoding.UTF8.GetBytes(”The quick brown fox jumped up the fence and fell down”)
)));

// Outputs SHA-224: 475F234AC83E68834716DFF035A018AEFF5D575560B694EDD5FD40DE
Debug.Print(”SHA-224: ” + HexDisplay.bytesToHex(SHA.computeSHA224(
 Encoding.UTF8.GetBytes(”The quick brown fox jumped up the fence and fell down”)
)));

// Outputs SHA-256: 8A1C5C14E24F5EA8F04061CA96A389DF77F838D0BEAD3253CFFEF8C880F912AA
Debug.Print(”SHA-256: ” + HexDisplay.bytesToHex(SHA.computeSHA256(
 Encoding.UTF8.GetBytes(”The quick brown fox jumped up the fence and fell down”)
)));

// Outputs HMAC SHA-1: A31FBA759E7E25430CCC746800DFBA9926D3AAB9
Debug.Print(”HMAC SHA-1: ” + HexDisplay.bytesToHex(SHA.computeHMAC_SHA1(
 Encoding.UTF8.GetBytes(”testkey”),
 Encoding.UTF8.GetBytes(”The quick brown fox jumped up the fence and fell down”)
 )));

// Outputs HMAC SHA-224: A36AA9599671BFA825BF8B1444F52E7266E4B0E2C30FD5D920EEA980
Debug.Print(”HMAC SHA-224: ” + HexDisplay.bytesToHex(SHA.computeHMAC_SHA224(
 Encoding.UTF8.GetBytes(”testkey”),
 Encoding.UTF8.GetBytes(”The quick brown fox jumped up the fence and fell down”)
)));

// Outputs HMAC SHA-256: 5AF95A03C056CED859AE31BB320BD620997544102BBFA487FB36CB4731B5A385
Debug.Print(”HMAC SHA-256: ” + HexDisplay.bytesToHex(SHA.computeHMAC_SHA256(
 Encoding.UTF8.GetBytes(”testkey”),
 Encoding.UTF8.GetBytes(”The quick brown fox jumped up the fence and fell down”)
)));

Download:
You can download the class with test program: MF_SHA.zip