Class HmacMd5

Namespace

CryptoHives.Foundation.Security.Cryptography.Mac

Assembly

CryptoHives.Foundation.Security.Cryptography.dll

Computes the HMAC-MD5 message authentication code.

[Obsolete("HMAC-MD5 is provided for legacy compatibility. Prefer HmacSha256 or stronger.")]
public sealed class HmacMd5 : HmacCore, IMac, IDisposable

Inheritance

object

HmacCore

HmacMd5

Implements

IMac

IDisposable

Inherited Members

HmacCore.AlgorithmName

HmacCore.MacSize

HmacCore.Update(ReadOnlySpan<byte>)

HmacCore.Finalize(Span<byte>)

HmacCore.Reset()

HmacCore.ComputeHash(ReadOnlySpan<byte>)

HmacCore.ComputeHash(byte[])

HmacCore.Dispose()

object.ToString()

object.Equals(object)

object.Equals(object, object)

object.ReferenceEquals(object, object)

object.GetHashCode()

object.GetType()

Remarks

This is a fully managed implementation of HMAC-MD5 as defined in RFC 2104, using the CryptoHives MD5 implementation. It does not rely on OS or hardware cryptographic APIs, ensuring deterministic behavior across all platforms.

HMAC-MD5 produces a 128-bit (16-byte) authentication tag.

Security warning: MD5 is considered cryptographically broken. While HMAC-MD5 is still considered secure for authentication in some contexts, prefer HMAC-SHA-256 or stronger variants for new applications.

Constructors

HmacMd5(byte[])

Initializes a new instance of the HmacMd5 class.

public HmacMd5(byte[] key)

Parameters

key byte[]

The secret key.

Fields

MacSizeBits

The MAC output size in bits.

public const int MacSizeBits = 128

Field Value

int

MacSizeBytes

The MAC output size in bytes.

public const int MacSizeBytes = 16

Field Value

int

Methods

Create(byte[])

Creates a new instance of the HmacMd5 class.

public static HmacMd5 Create(byte[] key)

Parameters

key byte[]

The secret key.

Returns

HmacMd5

A new HMAC-MD5 instance.

Hash(byte[], byte[])

Computes the HMAC-MD5 tag for the specified key and data in a single operation.

public static byte[] Hash(byte[] key, byte[] data)

Parameters

key byte[]

The secret key.

data byte[]

The data to authenticate.

Returns

byte[]

The 16-byte MAC tag.