static EncryptionAlgorithm[] DecodeEncryptionAlgorithms(byte[] rawData)
{
using (var memory = new MemoryStream(rawData, false)) {
using (var asn1 = new Asn1InputStream(memory)) {
var algorithms = new List <EncryptionAlgorithm> ();
var sequence = asn1.ReadObject() as Asn1Sequence;
if (sequence == null)
{
return(null);
}
for (int i = 0; i < sequence.Count; i++)
{
var identifier = AlgorithmIdentifier.GetInstance(sequence[i]);
EncryptionAlgorithm algorithm;
if (BouncyCastleSecureMimeContext.TryGetEncryptionAlgorithm(identifier, out algorithm))
{
algorithms.Add(algorithm);
}
}
return(algorithms.ToArray());
}
}
}
/// <summary>
/// Initializes a new instance of the <see cref="MimeKit.Cryptography.WindowsSecureMimeDigitalSignature"/> class.
/// </summary>
/// <remarks>
/// Creates a new <see cref="WindowsSecureMimeDigitalSignature"/>.
/// </remarks>
/// <param name="signerInfo">The information about the signer.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="signerInfo"/> is <c>null</c>.
/// </exception>
public WindowsSecureMimeDigitalSignature(SignerInfo signerInfo)
{
if (signerInfo == null)
{
throw new ArgumentNullException(nameof(signerInfo));
}
SignerInfo = signerInfo;
var algorithms = new List <EncryptionAlgorithm> ();
DigestAlgorithm digestAlgo;
if (signerInfo.SignedAttributes != null)
{
for (int i = 0; i < signerInfo.SignedAttributes.Count; i++)
{
if (signerInfo.SignedAttributes[i].Oid.Value == CmsAttributes.SigningTime.Id)
{
var signingTime = signerInfo.SignedAttributes[i].Values[0] as Pkcs9SigningTime;
if (signingTime != null)
{
CreationDate = signingTime.SigningTime;
}
}
else if (signerInfo.SignedAttributes[i].Oid.Value == SmimeAttributes.SmimeCapabilities.Id)
{
foreach (var value in signerInfo.SignedAttributes[i].Values)
{
var sequences = (DerSequence)Asn1Object.FromByteArray(value.RawData);
foreach (Asn1Sequence sequence in sequences)
{
var identifier = Org.BouncyCastle.Asn1.X509.AlgorithmIdentifier.GetInstance(sequence);
EncryptionAlgorithm algorithm;
if (BouncyCastleSecureMimeContext.TryGetEncryptionAlgorithm(identifier, out algorithm))
{
algorithms.Add(algorithm);
}
}
}
}
}
}
EncryptionAlgorithms = algorithms.ToArray();
if (WindowsSecureMimeContext.TryGetDigestAlgorithm(signerInfo.DigestAlgorithm, out digestAlgo))
{
DigestAlgorithm = digestAlgo;
}
SignerCertificate = new WindowsSecureMimeDigitalCertificate(signerInfo.Certificate);
}
/// <summary>
/// Initializes a new instance of the <see cref="MimeKit.Cryptography.SecureMimeDigitalSignature"/> class.
/// </summary>
/// <remarks>
/// Creates a new <see cref="SecureMimeDigitalSignature"/>.
/// </remarks>
/// <param name="signerInfo">The information about the signer.</param>
/// <param name="certificate">The signer's certificate.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="signerInfo"/> is <c>null</c>.
/// </exception>
public SecureMimeDigitalSignature(SignerInformation signerInfo, X509Certificate certificate)
{
if (signerInfo == null)
{
throw new ArgumentNullException(nameof(signerInfo));
}
SignerInfo = signerInfo;
var algorithms = new List <EncryptionAlgorithm> ();
DigestAlgorithm digestAlgo;
if (signerInfo.SignedAttributes != null)
{
Asn1EncodableVector vector = signerInfo.SignedAttributes.GetAll(CmsAttributes.SigningTime);
foreach (Org.BouncyCastle.Asn1.Cms.Attribute attr in vector)
{
var signingTime = (DerUtcTime)((DerSet)attr.AttrValues)[0];
CreationDate = ToAdjustedDateTime(signingTime);
break;
}
vector = signerInfo.SignedAttributes.GetAll(SmimeAttributes.SmimeCapabilities);
foreach (Org.BouncyCastle.Asn1.Cms.Attribute attr in vector)
{
foreach (Asn1Sequence sequence in attr.AttrValues)
{
for (int i = 0; i < sequence.Count; i++)
{
var identifier = AlgorithmIdentifier.GetInstance(sequence[i]);
EncryptionAlgorithm algorithm;
if (BouncyCastleSecureMimeContext.TryGetEncryptionAlgorithm(identifier, out algorithm))
{
algorithms.Add(algorithm);
}
}
}
}
EncryptionAlgorithms = algorithms.ToArray();
}
if (BouncyCastleSecureMimeContext.TryGetDigestAlgorithm(signerInfo.DigestAlgorithmID, out digestAlgo))
{
DigestAlgorithm = digestAlgo;
}
if (certificate != null)
{
SignerCertificate = new SecureMimeDigitalCertificate(certificate);
}
}
