コード例 #1
0
        private void InitFromHandles(CryptMsgSafeHandle messageHandle, LocalBufferSafeHandle signerHandle)
        {
            var signerInfo = Marshal.PtrToStructure <CMSG_SIGNER_INFO>(signerHandle.DangerousGetHandle());
            var subjectId  = new UniversalSubjectIdentifier(signerInfo.Issuer, signerInfo.SerialNumber);
            var certs      = GetCertificatesFromMessage(messageHandle);

            if (subjectId.Type == SubjectIdentifierType.SubjectKeyIdentifier)
            {
                Certificate = FindCertificate((string)subjectId.Value, certs);
            }
            else if (subjectId.Type == SubjectIdentifierType.IssuerAndSerialNumber)
            {
                Certificate = FindCertificate((X509IssuerSerial)subjectId.Value, certs);
            }
            AdditionalCertificates  = certs;
            DigestAlgorithm         = new Oid(signerInfo.HashAlgorithm.pszObjId);
            HashEncryptionAlgorithm = new Oid(signerInfo.HashEncryptionAlgorithm.pszObjId);
            SerialNumber            = ReadBlob(signerInfo.SerialNumber);
            UnsignedAttributes      = ReadAttributes(signerInfo.UnauthAttrs);
            SignedAttributes        = ReadAttributes(signerInfo.AuthAttrs);
        }
コード例 #2
0
        public unsafe AuthenticodeSignature(AsnEncodedData data, ISignature owningSignature)
        {
            OwningSignature        = owningSignature;
            Kind                   = SignatureKind.AuthenticodeTimestamp;
            AdditionalCertificates = owningSignature.AdditionalCertificates;
            fixed(byte *dataPtr = data.RawData)
            {
                uint size = 0;
                LocalBufferSafeHandle localBuffer;

                if (Crypt32.CryptDecodeObjectEx(EncodingType.PKCS_7_ASN_ENCODING | EncodingType.X509_ASN_ENCODING, (IntPtr)500, new IntPtr(dataPtr), (uint)data.RawData.Length, CryptDecodeFlags.CRYPT_DECODE_ALLOC_FLAG, IntPtr.Zero, out localBuffer, ref size))
                {
                    using (localBuffer)
                    {
                        var signerInfo = Marshal.PtrToStructure <CMSG_SIGNER_INFO>(localBuffer.DangerousGetHandle());
                        DigestAlgorithm         = new Oid(signerInfo.HashAlgorithm.pszObjId);
                        HashEncryptionAlgorithm = new Oid(signerInfo.HashEncryptionAlgorithm.pszObjId);
                        SerialNumber            = ReadBlob(signerInfo.SerialNumber);
                        UnsignedAttributes      = ReadAttributes(signerInfo.UnauthAttrs);
                        SignedAttributes        = ReadAttributes(signerInfo.AuthAttrs);
                        var subjectId = new UniversalSubjectIdentifier(signerInfo.Issuer, signerInfo.SerialNumber);
                        if (subjectId.Type == SubjectIdentifierType.SubjectKeyIdentifier)
                        {
                            Certificate = FindCertificate((string)subjectId.Value, OwningSignature.AdditionalCertificates);
                        }
                        else if (subjectId.Type == SubjectIdentifierType.IssuerAndSerialNumber)
                        {
                            Certificate = FindCertificate((X509IssuerSerial)subjectId.Value, OwningSignature.AdditionalCertificates);
                        }
                    }
                }
                else
                {
                    throw new InvalidOperationException("Failed to read Authenticode signature");
                }
            }
        }