/// <summary>
/// Transforms a <see cref="SignedEntity"/> to the associated <see cref="SignedCms"/> instance
/// </summary>
/// <param name="entity">The <see cref="SignedEntity"/> to deserialize</param>
/// <returns>The corresponding <see cref="SignedCms"/></returns>
public SignedCms DeserializeDetachedSignature(SignedEntity entity)
{
if (entity == null)
{
throw new SignatureException(SignatureError.NullEntity);
}
// Serialize entity out as ASCII encoded...
byte[] contentBytes = DefaultSerializer.Default.SerializeToBytes(entity.Content);
byte[] signatureBytes = Convert.FromBase64String(entity.Signature.Body.Text);
return(DeserializeDetachedSignature(contentBytes, signatureBytes));
}
/// <summary>
/// Transforms a <see cref="SignedEntity"/> to the associated <see cref="SignedCms"/> instance
/// </summary>
/// <param name="entity">The <see cref="SignedEntity"/> to deserialize</param>
/// <returns>The corresponding <see cref="SignedCms"/></returns>
public SignedCms DeserializeDetachedSignature(SignedEntity entity)
{
if (entity == null)
{
throw new SignatureException(SignatureError.NullEntity);
}
// Serialize entity out as ASCII encoded...
byte[] contentBytes = DefaultSerializer.Default.SerializeToBytes(entity.Content);
byte[] signatureBytes = Convert.FromBase64String(entity.Signature.Body.Text);
return DeserializeDetachedSignature(contentBytes, signatureBytes);
}
//-----------------------------------------------------
//
// Signature Validation
//
//-----------------------------------------------------
/// <summary>
/// Checks that a signature was signed by the signer certificate.
/// </summary>
/// <param name="signedEntity">The signed entity to check</param>
/// <param name="signerCertificate">The signer certificaet that purports to sign the entity</param>
/// <exception cref="SignatureException">If the entity was not signed by the claimed certificate</exception>
public void CheckSignature(SignedEntity signedEntity, X509Certificate2 signerCertificate)
{
SignedCms signatureEnvelope = DeserializeDetachedSignature(signedEntity);
CheckSignature(signatureEnvelope.SignerInfos, signerCertificate);
}
//-----------------------------------------------------
//
// Signature Validation
//
//-----------------------------------------------------
/// <summary>
/// Checks that a signature was signed by the signer certificate.
/// </summary>
/// <param name="signedEntity">The signed entity to check</param>
/// <param name="signerCertificate">The signer certificaet that purports to sign the entity</param>
/// <exception cref="SignatureException">If the entity was not signed by the claimed certificate</exception>
public void CheckSignature(SignedEntity signedEntity, X509Certificate2 signerCertificate)
{
SignedCms signatureEnvelope = DeserializeDetachedSignature(signedEntity);
CheckSignature(signatureEnvelope.SignerInfos, signerCertificate);
}