HMACMD5 Constructors
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Initializes a new instance of the HMACMD5 class.
HMACMD5() |
Initializes a new instance of the HMACMD5 class by using a randomly generated key. |
HMACMD5(Byte[]) |
Initializes a new instance of the HMACMD5 class by using the specified key. |
- Source:
- HMACMD5.cs
- Source:
- HMACMD5.cs
- Source:
- HMACMD5.cs
Initializes a new instance of the HMACMD5 class by using a randomly generated key.
public:
HMACMD5();
public HMACMD5 ();
[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public HMACMD5 ();
Public Sub New ()
- Attributes
Remarks
HMACMD5 is a type of keyed hash algorithm that is constructed from the MD5 hash function and used as a Hash-based Message Authentication Code (HMAC). The HMAC process mixes a secret key with the message data, hashes the result with the hash function, mixes that hash value with the secret key again, and then applies the hash function a second time. The output hash is 128 bits in length.
This constructor uses a 64-byte, randomly generated key.
Due to collision problems with MD5, Microsoft recommends SHA256.
See also
Applies to
.NET 9 والإصدارات الأخرى
منتج | الإصدارات |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.3, 1.4, 1.6, 2.0, 2.1 |
- Source:
- HMACMD5.cs
- Source:
- HMACMD5.cs
- Source:
- HMACMD5.cs
Initializes a new instance of the HMACMD5 class by using the specified key.
public:
HMACMD5(cli::array <System::Byte> ^ key);
public HMACMD5 (byte[] key);
[System.Runtime.Versioning.UnsupportedOSPlatform("browser")]
public HMACMD5 (byte[] key);
new System.Security.Cryptography.HMACMD5 : byte[] -> System.Security.Cryptography.HMACMD5
[<System.Runtime.Versioning.UnsupportedOSPlatform("browser")>]
new System.Security.Cryptography.HMACMD5 : byte[] -> System.Security.Cryptography.HMACMD5
Public Sub New (key As Byte())
Parameters
- key
- Byte[]
The secret key for HMAC computation. The key can be any length, but if it is more than 64 bytes long it will be hashed (using MD5) to derive a 16-byte key. Therefore, the recommended size of the secret key is 64 bytes.
- Attributes
Exceptions
The key
parameter is null
.
Examples
For an example of how to use this constructor, see the HMACMD5 class.
Remarks
HMACMD5 is a type of keyed hash algorithm that is constructed from the MD5 hash function and used as a Hash-based Message Authentication Code (HMAC). The HMAC process mixes a secret key with the message data, hashes the result with the hash function, mixes that hash value with the secret key again, and then applies the hash function a second time. The output hash is 128 bits in length.
This constructor uses a key you provide to create the HMACMD5 object.
Due to collision problems with MD5, Microsoft recommends SHA256.
See also
Applies to
.NET 9 والإصدارات الأخرى
منتج | الإصدارات |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9 |
.NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.3, 1.4, 1.6, 2.0, 2.1 |
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