Hashing

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MD5

TinyCLR OS supports MD5 hash function.

The following commands will calculate the MD5 hash value of a byte array:

Tip

Needed NuGets: GHIElectronics.TinyCLR.Core and GHIElectronics.TinyCLR.Cryptography

var md5 = GHIElectronics.TinyCLR.Cryptography.MD5.Create();
var hashValue = md5.ComputeHash(data); //data is a byte array.

CRC16

TinyCLR OS also supports CRC16.

ComputeHash(byte[] data, int offset, int count);

Large amounts of data can be calculated in chunks and the hash is concatenated automatically. Calling Reset resets the seed value.

var crc16 = new Crc16();
var data = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };

// Uses entire array to build the hash
crc16.Reset(); // reset seed = 0;
var crcVal1 = crc16.ComputeHash(data, 0, data.Length);

// Uses chunks of the array to build the hash
crc16.Reset(); // reset seed = 0;
var crcSeed1 = crc16.ComputeHash(data, 0, 3);
var crcSeed2 = crc16.ComputeHash(data, 3, 1);         
var crcVal2 = crc16.ComputeHash(data, 4, 4); 

// `crcVal1` and `crcVal2` will match.