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<DLLImport("advapi32.dll", CharSet := CharSet.Auto, SetLastError := True)>
Public Shared Function CryptGenKey(ByVal hProv As IntPtr, ByVal Algid As UInteger, ByVal dwFlags As UInteger, ByRef phKey As IntPtr) As Boolean
End Function
Declare Function CryptGenKey Lib "advapi32.dll" (TODO) As TODO
User-Defined Types:
None.
Alternative Managed API:
Do you know one? Please contribute it!
Notes:
be carfeul with the third parameter (dwFlags). It has different meanings depending on the object your are generating. Have a look at the MSDN.
None.
Tips & Tricks:
Those C# enums can be used in conjonction with the function. They are defined in the header WinCrypt.h.
Note that the second parameter of the function (Algid) expects a CryptAlg value.
public const uint CALG_AES = 0x00006611;
public const uint CALG_AES_128 = 0x0000660e;
public const uint CALG_AES_192 = 0x0000660f;
public const uint CALG_AES_256 = 0x00006610;
Please add more constants!
/// <summary>
/// Source: WinCrypt.h
/// </summary>
public enum CryptAlgClass : uint
{
ALG_CLASS_ANY = (0),
ALG_CLASS_SIGNATURE = (1 << 13),
ALG_CLASS_MSG_ENCRYPT = (2 << 13),
ALG_CLASS_DATA_ENCRYPT = (3 << 13),
ALG_CLASS_HASH = (4 << 13),
ALG_CLASS_KEY_EXCHANGE = (5 << 13),
ALG_CLASS_ALL = (7 << 13)
}
public const uint CRYPT_EXPORTABLE = 0x00000001;
public const uint CRYPT_USER_PROTECTED = 0x00000002;
public const uint CRYPT_CREATE_SALT = 0x00000004;
public const uint CRYPT_UPDATE_KEY = 0x00000008;
public const uint CRYPT_NO_SALT = 0x00000010;
public const uint CRYPT_PREGEN = 0x00000040;
public const uint CRYPT_RECIPIENT = 0x00000010;
public const uint CRYPT_INITIATOR = 0x00000040;
public const uint CRYPT_ONLINE = 0x00000080;
public const uint CRYPT_SF = 0x00000100;
public const uint CRYPT_CREATE_IV = 0x00000200;
public const uint CRYPT_KEK = 0x00000400;
public const uint CRYPT_DATA_KEY = 0x00000800;
public const uint CRYPT_VOLATILE = 0x00001000;
public const uint CRYPT_SGCKEY = 0x00002000;
public const uint CRYPT_ARCHIVABLE = 0x00004000;
/// NOTE: hProv is a valid context handle see: CryptAquireContext
uint keySize = 2048;
IntPtr hKey = IntPtr.Zero;
/// Put the key size in the upper 16 bits
uint dwFlags = keySize << 16;
/// NOTE: Some additional flags can be set in dwFlags. Just OR them :
/// dwFlags |= someFlag;
CryptGenKey(hProv, (uint)CryptAlg.CALG_RSA_SIGN, dwFlags, out hKey);
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