public byte[] ComputeCapiSha1OfPublicKey(PublicKey key)
{
unsafe
{
fixed(byte *pszOidValue = key.Oid.ValueAsAscii())
{
byte[] encodedParameters = key.EncodedParameters.RawData;
fixed(byte *pEncodedParameters = encodedParameters)
{
byte[] encodedKeyValue = key.EncodedKeyValue.RawData;
fixed(byte *pEncodedKeyValue = encodedKeyValue)
{
Interop.Crypt32.CERT_PUBLIC_KEY_INFO publicKeyInfo = new Interop.Crypt32.CERT_PUBLIC_KEY_INFO()
{
Algorithm = new Interop.Crypt32.CRYPT_ALGORITHM_IDENTIFIER()
{
pszObjId = new IntPtr(pszOidValue),
Parameters = new Interop.Crypt32.DATA_BLOB(new IntPtr(pEncodedParameters), (uint)encodedParameters.Length),
},
PublicKey = new Interop.Crypt32.CRYPT_BIT_BLOB()
{
cbData = encodedKeyValue.Length,
pbData = new IntPtr(pEncodedKeyValue),
cUnusedBits = 0,
},
};
int cb = 20;
byte[] buffer = new byte[cb];
if (!Interop.Crypt32.CryptHashPublicKeyInfo(IntPtr.Zero, AlgId.CALG_SHA1, 0, Interop.Crypt32.CertEncodingType.All, ref publicKeyInfo, buffer, ref cb))
{
throw Marshal.GetHRForLastWin32Error().ToCryptographicException();
}
if (cb < buffer.Length)
{
byte[] newBuffer = new byte[cb];
Buffer.BlockCopy(buffer, 0, newBuffer, 0, cb);
buffer = newBuffer;
}
return(buffer);
}
}
}
}
}
public static partial bool CryptHashPublicKeyInfo(IntPtr hCryptProv, int algId, int dwFlags, Interop.Crypt32.CertEncodingType dwCertEncodingType, ref Interop.Crypt32.CERT_PUBLIC_KEY_INFO pInfo, byte[] pbComputedHash, ref int pcbComputedHash);