private static void EncodeDecode(
byte[] certBytes,
X509SubjectKeyIdentifierHashAlgorithm algorithm,
bool critical,
byte[] expectedDer,
string expectedIdentifier)
{
PublicKey pk;
using (var cert = new X509Certificate2(certBytes))
{
pk = cert.PublicKey;
}
X509SubjectKeyIdentifierExtension ext =
new X509SubjectKeyIdentifierExtension(pk, algorithm, critical);
byte[] rawData = ext.RawData;
Assert.Equal(expectedDer, rawData);
ext = new X509SubjectKeyIdentifierExtension(new AsnEncodedData(rawData), critical);
Assert.Equal(expectedIdentifier, ext.SubjectKeyIdentifier);
Assert.Equal(expectedIdentifier, Convert.ToHexString(ext.SubjectKeyIdentifierBytes.Span));
ReadOnlyMemory <byte> ski1 = ext.SubjectKeyIdentifierBytes;
ReadOnlyMemory <byte> ski2 = ext.SubjectKeyIdentifierBytes;
Assert.True(ski1.Span == ski2.Span, "Two calls to SubjectKeyIdentifierBytes return the same buffer");
}
public X509SubjectKeyIdentifierExtension(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical)
{
Contract.Requires(key.EncodedKeyValue != null);
Contract.Requires(key.EncodedKeyValue.RawData != null);
Contract.Requires(key.EncodedParameters != null);
Contract.Requires(key.EncodedParameters.RawData != null);
Contract.Ensures(key.EncodedParameters.RawData != null);
}
public X509SubjectKeyIdentifierExtension(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical)
{
Contract.Requires(key.EncodedKeyValue != null);
Contract.Requires(key.EncodedKeyValue.RawData != null);
Contract.Requires(key.EncodedParameters != null);
Contract.Requires(key.EncodedParameters.RawData != null);
Contract.Ensures(key.EncodedParameters.RawData != null);
}
private static byte[] EncodeExtension(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm)
{
if (key == null)
{
throw new ArgumentNullException(nameof(key));
}
byte[] subjectKeyIdentifier = GenerateSubjectKeyIdentifierFromPublicKey(key, algorithm);
return(EncodeExtension(subjectKeyIdentifier));
}
public X509SubjectKeyIdentifierExtension(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
byte[] pkraw = key.EncodedKeyValue.RawData;
// compute SKI
switch (algorithm)
{
// hash of the public key, excluding Tag, Length and unused bits values
case X509SubjectKeyIdentifierHashAlgorithm.Sha1:
_subjectKeyIdentifier = SHA1.Create().ComputeHash(pkraw);
break;
// 0100 bit pattern followed by the 60 last bit of the hash
case X509SubjectKeyIdentifierHashAlgorithm.ShortSha1:
byte[] hash = SHA1.Create().ComputeHash(pkraw);
_subjectKeyIdentifier = new byte [8];
Buffer.BlockCopy(hash, 12, _subjectKeyIdentifier, 0, 8);
_subjectKeyIdentifier [0] = (byte)(0x40 | (_subjectKeyIdentifier [0] & 0x0F));
break;
// hash of the public key, including Tag, Length and unused bits values
case X509SubjectKeyIdentifierHashAlgorithm.CapiSha1:
// CryptoAPI does that hash on the complete subjectPublicKeyInfo (unlike PKIX)
// http://groups.google.ca/groups?selm=e7RqM%24plCHA.1488%40tkmsftngp02&oe=UTF-8&output=gplain
ASN1 subjectPublicKeyInfo = new ASN1(0x30);
ASN1 algo = subjectPublicKeyInfo.Add(new ASN1(0x30));
algo.Add(new ASN1(CryptoConfig.EncodeOID(key.Oid.Value)));
algo.Add(new ASN1(key.EncodedParameters.RawData));
// add an extra byte for the unused bits (none)
byte[] full = new byte [pkraw.Length + 1];
Buffer.BlockCopy(pkraw, 0, full, 1, pkraw.Length);
subjectPublicKeyInfo.Add(new ASN1(0x03, full));
_subjectKeyIdentifier = SHA1.Create().ComputeHash(subjectPublicKeyInfo.GetBytes());
break;
default:
throw new ArgumentException("algorithm");
}
_oid = new Oid(oid, friendlyName);
base.Critical = critical;
RawData = Encode();
}
private static void TestSubjectKeyIdentifierExtension(
byte[] certBytes,
X509SubjectKeyIdentifierHashAlgorithm algorithm,
bool critical,
byte[] expectedDer,
string expectedIdentifier)
{
PublicKey pk = new X509Certificate2(certBytes).PublicKey;
X509SubjectKeyIdentifierExtension ext =
new X509SubjectKeyIdentifierExtension(pk, algorithm, critical);
byte[] rawData = ext.RawData;
Assert.Equal(expectedDer, rawData);
ext = new X509SubjectKeyIdentifierExtension(new AsnEncodedData(rawData), critical);
Assert.Equal(expectedIdentifier, ext.SubjectKeyIdentifier);
}
/// <summary>Initializes a new instance of the <see cref="T:System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierExtension" /> class using a public key, a hash algorithm identifier, and a value indicating whether the extension is critical. </summary>
/// <param name="key">A <see cref="T:System.Security.Cryptography.X509Certificates.PublicKey" /> object to create a subject key identifier (SKI) from.</param>
/// <param name="algorithm">One of the <see cref="T:System.Security.Cryptography.X509Certificates.X509SubjectKeyIdentifierHashAlgorithm" /> values that identifies which hash algorithm to use.</param>
/// <param name="critical">true if the extension is critical; otherwise, false.</param>
public X509SubjectKeyIdentifierExtension(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
byte[] rawData = key.EncodedKeyValue.RawData;
switch (algorithm)
{
case X509SubjectKeyIdentifierHashAlgorithm.Sha1:
this._subjectKeyIdentifier = SHA1.Create().ComputeHash(rawData);
break;
case X509SubjectKeyIdentifierHashAlgorithm.ShortSha1:
{
byte[] src = SHA1.Create().ComputeHash(rawData);
this._subjectKeyIdentifier = new byte[8];
Buffer.BlockCopy(src, 12, this._subjectKeyIdentifier, 0, 8);
this._subjectKeyIdentifier[0] = (64 | (this._subjectKeyIdentifier[0] & 15));
break;
}
case X509SubjectKeyIdentifierHashAlgorithm.CapiSha1:
{
ASN1 asn = new ASN1(48);
ASN1 asn2 = asn.Add(new ASN1(48));
asn2.Add(new ASN1(CryptoConfig.EncodeOID(key.Oid.Value)));
asn2.Add(new ASN1(key.EncodedParameters.RawData));
byte[] array = new byte[rawData.Length + 1];
Buffer.BlockCopy(rawData, 0, array, 1, rawData.Length);
asn.Add(new ASN1(3, array));
this._subjectKeyIdentifier = SHA1.Create().ComputeHash(asn.GetBytes());
break;
}
default:
throw new ArgumentException("algorithm");
}
this._oid = new Oid("2.5.29.14", "Subject Key Identifier");
base.Critical = critical;
base.RawData = this.Encode();
}
public X509SubjectKeyIdentifierExtension (PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical) :
base (CAPI.szOID_SUBJECT_KEY_IDENTIFIER, EncodePublicKey(key, algorithm), critical) {}
private static unsafe byte[] EncodePublicKey (PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm) {
if (key == null)
throw new ArgumentNullException("key");
// Construct CERT_PUBLIC_KEY_INFO2 in unmanged memory from given encoded blobs.
SafeLocalAllocHandle publicKeyInfo = EncodePublicKey(key);
CAPI.CERT_PUBLIC_KEY_INFO2 * pPublicKeyInfo = (CAPI.CERT_PUBLIC_KEY_INFO2 *) publicKeyInfo.DangerousGetHandle();
byte [] buffer = new byte[20];
byte [] identifier = null;
fixed (byte * pBuffer = buffer) {
uint cbData = (uint)buffer.Length;
IntPtr pbData = new IntPtr(pBuffer);
try {
if ((X509SubjectKeyIdentifierHashAlgorithm.Sha1 == algorithm)
|| (X509SubjectKeyIdentifierHashAlgorithm.ShortSha1 == algorithm)) {
//+=================================================================
// (1) The keyIdentifier is composed of the 160-bit SHA-1 hash of
// the value of the BIT STRING subjectPublicKey (excluding the tag,
// length, and number of unused bits).
if (!CAPI.CryptHashCertificate(
IntPtr.Zero, // hCryptProv
CAPI.CALG_SHA1,
0, // dwFlags,
pPublicKeyInfo->PublicKey.pbData,
pPublicKeyInfo->PublicKey.cbData,
pbData,
new IntPtr(&cbData)))
throw new CryptographicException(Marshal.GetHRForLastWin32Error());
}
//+=================================================================
// Microsoft convention: The keyIdentifier is composed of the
// 160-bit SHA-1 hash of the encoded subjectPublicKey BITSTRING
// (including the tag, length, and number of unused bits).
else if (X509SubjectKeyIdentifierHashAlgorithm.CapiSha1 == algorithm) {
if (!CAPI.CryptHashPublicKeyInfo(
IntPtr.Zero, // hCryptProv
CAPI.CALG_SHA1,
0, // dwFlags,
CAPI.X509_ASN_ENCODING,
new IntPtr(pPublicKeyInfo),
pbData,
new IntPtr(&cbData))) {
throw new CryptographicException(Marshal.GetHRForLastWin32Error());
}
} else {
throw new ArgumentException("algorithm");
}
//+=================================================================
// (2) The keyIdentifier is composed of a four bit type field with
// the value 0100 followed by the least significant 60 bits of the
// SHA-1 hash of the value of the BIT STRING subjectPublicKey
// (excluding the tag, length, and number of unused bit string bits)
if (X509SubjectKeyIdentifierHashAlgorithm.ShortSha1 == algorithm) {
identifier = new byte[8];
Array.Copy(buffer, buffer.Length - 8, identifier, 0, identifier.Length);
identifier[0] &= 0x0f;
identifier[0] |= 0x40;
} else {
identifier = buffer;
// return the meaningful part only
if (buffer.Length > (int)cbData) {
identifier = new byte[cbData];
Array.Copy(buffer, 0, identifier, 0, identifier.Length);
}
}
} finally {
publicKeyInfo.Dispose();
}
}
return EncodeExtension(identifier);
}
public X509SubjectKeyIdentifierExtension(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical);
public X509SubjectKeyIdentifierExtension(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical) : base("2.5.29.14", EncodePublicKey(key, algorithm), critical)
{
}
private static unsafe byte[] EncodePublicKey(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
// Construct CERT_PUBLIC_KEY_INFO2 in unmanged memory from given encoded blobs.
SafeLocalAllocHandle publicKeyInfo = EncodePublicKey(key);
CAPI.CERT_PUBLIC_KEY_INFO2 *pPublicKeyInfo = (CAPI.CERT_PUBLIC_KEY_INFO2 *)publicKeyInfo.DangerousGetHandle();
byte [] buffer = new byte[20];
byte [] identifier = null;
fixed(byte *pBuffer = buffer)
{
uint cbData = (uint)buffer.Length;
IntPtr pbData = new IntPtr(pBuffer);
try {
if ((X509SubjectKeyIdentifierHashAlgorithm.Sha1 == algorithm) ||
(X509SubjectKeyIdentifierHashAlgorithm.ShortSha1 == algorithm))
{
//+=================================================================
// (1) The keyIdentifier is composed of the 160-bit SHA-1 hash of
// the value of the BIT STRING subjectPublicKey (excluding the tag,
// length, and number of unused bits).
if (!CAPI.CryptHashCertificate(
IntPtr.Zero, // hCryptProv
CAPI.CALG_SHA1,
0, // dwFlags,
pPublicKeyInfo->PublicKey.pbData,
pPublicKeyInfo->PublicKey.cbData,
pbData,
new IntPtr(&cbData)))
{
throw new CryptographicException(Marshal.GetHRForLastWin32Error());
}
}
//+=================================================================
// Microsoft convention: The keyIdentifier is composed of the
// 160-bit SHA-1 hash of the encoded subjectPublicKey BITSTRING
// (including the tag, length, and number of unused bits).
else if (X509SubjectKeyIdentifierHashAlgorithm.CapiSha1 == algorithm)
{
if (!CAPI.CryptHashPublicKeyInfo(
IntPtr.Zero, // hCryptProv
CAPI.CALG_SHA1,
0, // dwFlags,
CAPI.X509_ASN_ENCODING,
new IntPtr(pPublicKeyInfo),
pbData,
new IntPtr(&cbData)))
{
throw new CryptographicException(Marshal.GetHRForLastWin32Error());
}
}
else
{
throw new ArgumentException("algorithm");
}
//+=================================================================
// (2) The keyIdentifier is composed of a four bit type field with
// the value 0100 followed by the least significant 60 bits of the
// SHA-1 hash of the value of the BIT STRING subjectPublicKey
// (excluding the tag, length, and number of unused bit string bits)
if (X509SubjectKeyIdentifierHashAlgorithm.ShortSha1 == algorithm)
{
identifier = new byte[8];
Array.Copy(buffer, buffer.Length - 8, identifier, 0, identifier.Length);
identifier[0] &= 0x0f;
identifier[0] |= 0x40;
}
else
{
identifier = buffer;
// return the meaningful part only
if (buffer.Length > (int)cbData)
{
identifier = new byte[cbData];
Array.Copy(buffer, 0, identifier, 0, identifier.Length);
}
}
} finally {
publicKeyInfo.Dispose();
}
}
return(EncodeExtension(identifier));
}
public X509SubjectKeyIdentifierExtension (PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical)
{
if (key == null)
throw new ArgumentNullException ("key");
byte[] pkraw = key.EncodedKeyValue.RawData;
// compute SKI
switch (algorithm) {
// hash of the public key, excluding Tag, Length and unused bits values
case X509SubjectKeyIdentifierHashAlgorithm.Sha1:
_subjectKeyIdentifier = SHA1.Create ().ComputeHash (pkraw);
break;
// 0100 bit pattern followed by the 60 last bit of the hash
case X509SubjectKeyIdentifierHashAlgorithm.ShortSha1:
byte[] hash = SHA1.Create ().ComputeHash (pkraw);
_subjectKeyIdentifier = new byte [8];
Buffer.BlockCopy (hash, 12, _subjectKeyIdentifier, 0, 8);
_subjectKeyIdentifier [0] = (byte) (0x40 | (_subjectKeyIdentifier [0] & 0x0F));
break;
// hash of the public key, including Tag, Length and unused bits values
case X509SubjectKeyIdentifierHashAlgorithm.CapiSha1:
// CryptoAPI does that hash on the complete subjectPublicKeyInfo (unlike PKIX)
// http://groups.google.ca/groups?selm=e7RqM%24plCHA.1488%40tkmsftngp02&oe=UTF-8&output=gplain
ASN1 subjectPublicKeyInfo = new ASN1 (0x30);
ASN1 algo = subjectPublicKeyInfo.Add (new ASN1 (0x30));
algo.Add (new ASN1 (CryptoConfig.EncodeOID (key.Oid.Value)));
algo.Add (new ASN1 (key.EncodedParameters.RawData));
// add an extra byte for the unused bits (none)
byte[] full = new byte [pkraw.Length + 1];
Buffer.BlockCopy (pkraw, 0, full, 1, pkraw.Length);
subjectPublicKeyInfo.Add (new ASN1 (0x03, full));
_subjectKeyIdentifier = SHA1.Create ().ComputeHash (subjectPublicKeyInfo.GetBytes ());
break;
default:
throw new ArgumentException ("algorithm");
}
_oid = new Oid (oid, friendlyName);
base.Critical = critical;
RawData = Encode ();
}
public X509SubjectKeyIdentifierExtension(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical) : base("2.5.29.14", EncodePublicKey(key, algorithm), critical)
{
}
private static void TestSubjectKeyIdentifierExtension(
byte[] certBytes,
X509SubjectKeyIdentifierHashAlgorithm algorithm,
bool critical,
byte[] expectedDer,
string expectedIdentifier)
{
PublicKey pk = new X509Certificate2(certBytes).PublicKey;
X509SubjectKeyIdentifierExtension ext =
new X509SubjectKeyIdentifierExtension(pk, algorithm, critical);
byte[] rawData = ext.RawData;
Assert.Equal(expectedDer, rawData);
ext = new X509SubjectKeyIdentifierExtension(new AsnEncodedData(rawData), critical);
Assert.Equal(expectedIdentifier, ext.SubjectKeyIdentifier);
}
public X509SubjectKeyIdentifierExtension(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical)
: base(Oids.SubjectKeyIdentifier, EncodeExtension(key, algorithm), critical)
{
}
private static unsafe byte[] EncodePublicKey(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
SafeLocalAllocHandle handle = EncodePublicKey(key);
CAPIBase.CERT_PUBLIC_KEY_INFO2* cert_public_key_infoPtr = (CAPIBase.CERT_PUBLIC_KEY_INFO2*) handle.DangerousGetHandle();
byte[] sourceArray = new byte[20];
byte[] destinationArray = null;
fixed (byte* numRef = sourceArray)
{
uint length = (uint) sourceArray.Length;
IntPtr pbComputedHash = new IntPtr((void*) numRef);
try
{
if ((algorithm == X509SubjectKeyIdentifierHashAlgorithm.Sha1) || (X509SubjectKeyIdentifierHashAlgorithm.ShortSha1 == algorithm))
{
if (!CAPISafe.CryptHashCertificate(IntPtr.Zero, 0x8004, 0, cert_public_key_infoPtr->PublicKey.pbData, cert_public_key_infoPtr->PublicKey.cbData, pbComputedHash, new IntPtr((void*) &length)))
{
throw new CryptographicException(Marshal.GetHRForLastWin32Error());
}
}
else
{
if (X509SubjectKeyIdentifierHashAlgorithm.CapiSha1 != algorithm)
{
throw new ArgumentException("algorithm");
}
if (!CAPISafe.CryptHashPublicKeyInfo(IntPtr.Zero, 0x8004, 0, 1, new IntPtr((void*) cert_public_key_infoPtr), pbComputedHash, new IntPtr((void*) &length)))
{
throw new CryptographicException(Marshal.GetHRForLastWin32Error());
}
}
if (X509SubjectKeyIdentifierHashAlgorithm.ShortSha1 == algorithm)
{
destinationArray = new byte[8];
Array.Copy(sourceArray, sourceArray.Length - 8, destinationArray, 0, destinationArray.Length);
destinationArray[0] = (byte) (destinationArray[0] & 15);
destinationArray[0] = (byte) (destinationArray[0] | 0x40);
}
else
{
destinationArray = sourceArray;
if (sourceArray.Length > length)
{
destinationArray = new byte[length];
Array.Copy(sourceArray, 0, destinationArray, 0, destinationArray.Length);
}
}
}
finally
{
handle.Dispose();
}
}
return EncodeExtension(destinationArray);
}
public X509SubjectKeyIdentifierExtension(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical)
{
}
public X509SubjectKeyIdentifierExtension(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical)
: base(Oids.SubjectKeyIdentifierOid, EncodeExtension(key, algorithm), critical)
{
}
private static byte[] GenerateSubjectKeyIdentifierFromPublicKey(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm)
{
switch (algorithm)
{
case X509SubjectKeyIdentifierHashAlgorithm.Sha1:
return(SHA1.HashData(key.EncodedKeyValue.RawData));
case X509SubjectKeyIdentifierHashAlgorithm.ShortSha1:
{
byte[] sha1 = SHA1.HashData(key.EncodedKeyValue.RawData);
// ShortSha1: The keyIdentifier is composed of a four bit type field with
// the value 0100 followed by the least significant 60 bits of the
// SHA-1 hash of the value of the BIT STRING subjectPublicKey
// (excluding the tag, length, and number of unused bit string bits)
byte[] shortSha1 = new byte[8];
Buffer.BlockCopy(sha1, sha1.Length - 8, shortSha1, 0, shortSha1.Length);
shortSha1[0] &= 0x0f;
shortSha1[0] |= 0x40;
return(shortSha1);
}
case X509SubjectKeyIdentifierHashAlgorithm.CapiSha1:
return(X509Pal.Instance.ComputeCapiSha1OfPublicKey(key));
default:
throw new ArgumentException(SR.Format(SR.Arg_EnumIllegalVal, algorithm), nameof(algorithm));
}
}
private static byte[] EncodeExtension(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm)
{
if (key == null)
throw new ArgumentNullException(nameof(key));
byte[] subjectKeyIdentifier = GenerateSubjectKeyIdentifierFromPublicKey(key, algorithm);
return EncodeExtension(subjectKeyIdentifier);
}
public X509SubjectKeyIdentifierExtension(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical) :
base(CAPI.szOID_SUBJECT_KEY_IDENTIFIER, EncodePublicKey(key, algorithm), critical)
{
}
private static byte[] GenerateSubjectKeyIdentifierFromPublicKey(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm)
{
switch (algorithm)
{
case X509SubjectKeyIdentifierHashAlgorithm.Sha1:
return ComputeSha1(key.EncodedKeyValue.RawData);
case X509SubjectKeyIdentifierHashAlgorithm.ShortSha1:
{
byte[] sha1 = ComputeSha1(key.EncodedKeyValue.RawData);
// ShortSha1: The keyIdentifier is composed of a four bit type field with
// the value 0100 followed by the least significant 60 bits of the
// SHA-1 hash of the value of the BIT STRING subjectPublicKey
// (excluding the tag, length, and number of unused bit string bits)
byte[] shortSha1 = new byte[8];
Buffer.BlockCopy(sha1, sha1.Length - 8, shortSha1, 0, shortSha1.Length);
shortSha1[0] &= 0x0f;
shortSha1[0] |= 0x40;
return shortSha1;
}
case X509SubjectKeyIdentifierHashAlgorithm.CapiSha1:
return X509Pal.Instance.ComputeCapiSha1OfPublicKey(key);
default:
throw new ArgumentException(SR.Format(SR.Arg_EnumIllegalVal, algorithm), nameof(algorithm));
}
}
public X509SubjectKeyIdentifierExtension (PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical)
{
if (key == null)
throw new ArgumentNullException ("key");
}
private static unsafe byte[] EncodePublicKey(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
SafeLocalAllocHandle handle = EncodePublicKey(key);
CAPIBase.CERT_PUBLIC_KEY_INFO2 *cert_public_key_infoPtr = (CAPIBase.CERT_PUBLIC_KEY_INFO2 *)handle.DangerousGetHandle();
byte[] sourceArray = new byte[20];
byte[] destinationArray = null;
fixed(byte *numRef = sourceArray)
{
uint length = (uint)sourceArray.Length;
IntPtr pbComputedHash = new IntPtr((void *)numRef);
try
{
if ((algorithm == X509SubjectKeyIdentifierHashAlgorithm.Sha1) || (X509SubjectKeyIdentifierHashAlgorithm.ShortSha1 == algorithm))
{
if (!CAPISafe.CryptHashCertificate(IntPtr.Zero, 0x8004, 0, cert_public_key_infoPtr->PublicKey.pbData, cert_public_key_infoPtr->PublicKey.cbData, pbComputedHash, new IntPtr((void *)&length)))
{
throw new CryptographicException(Marshal.GetHRForLastWin32Error());
}
}
else
{
if (X509SubjectKeyIdentifierHashAlgorithm.CapiSha1 != algorithm)
{
throw new ArgumentException("algorithm");
}
if (!CAPISafe.CryptHashPublicKeyInfo(IntPtr.Zero, 0x8004, 0, 1, new IntPtr((void *)cert_public_key_infoPtr), pbComputedHash, new IntPtr((void *)&length)))
{
throw new CryptographicException(Marshal.GetHRForLastWin32Error());
}
}
if (X509SubjectKeyIdentifierHashAlgorithm.ShortSha1 == algorithm)
{
destinationArray = new byte[8];
Array.Copy(sourceArray, sourceArray.Length - 8, destinationArray, 0, destinationArray.Length);
destinationArray[0] = (byte)(destinationArray[0] & 15);
destinationArray[0] = (byte)(destinationArray[0] | 0x40);
}
else
{
destinationArray = sourceArray;
if (sourceArray.Length > length)
{
destinationArray = new byte[length];
Array.Copy(sourceArray, 0, destinationArray, 0, destinationArray.Length);
}
}
}
finally
{
handle.Dispose();
}
}
return(EncodeExtension(destinationArray));
}
public X509SubjectKeyIdentifierExtension(PublicKey key, X509SubjectKeyIdentifierHashAlgorithm algorithm, bool critical)
{
throw new NotImplementedException();
}