/// <summary>
/// Adds a signature to a package if it is not already signed.
/// </summary>
/// <param name="signatureStream">Stream of the signature SignedCms object to be added to the package.</param>
/// <param name="token">Cancellation Token.</param>
/// <returns></returns>
public async Task AddSignatureAsync(Stream signatureStream, CancellationToken token)
{
token.ThrowIfCancellationRequested();
ThrowIfZipReadStreamIsNull();
if (_zipWriteStream == null)
{
throw new SignatureException(Strings.SignedPackageUnableToAccessSignature);
}
if (await IsSignedAsync(token))
{
throw new SignatureException(NuGetLogCode.NU3001, Strings.SignedPackageAlreadySigned);
}
using (var reader = new BinaryReader(ZipReadStream, new UTF8Encoding(), leaveOpen: true))
using (var writer = new BinaryWriter(
_zipWriteStream,
new UTF8Encoding(encoderShouldEmitUTF8Identifier: false, throwOnInvalidBytes: true),
leaveOpen: true))
{
SignedPackageArchiveUtility.SignZip((MemoryStream)signatureStream, reader, writer);
}
}
/// <summary>
/// Adds a signature to a package if it is not already signed.
/// </summary>
/// <param name="signatureStream">Stream of the signature SignedCms object to be added to the package.</param>
/// <param name="token">Cancellation Token.</param>
/// <returns></returns>
public async Task AddSignatureAsync(Stream signatureStream, CancellationToken token)
{
token.ThrowIfCancellationRequested();
if (ZipReadStream == null)
{
throw new SignatureException(Strings.SignedPackageUnableToAccessSignature);
}
if (ZipWriteStream == null)
{
throw new SignatureException(Strings.SignedPackageUnableToAccessSignature);
}
if (await IsSignedAsync(token))
{
throw new SignatureException(NuGetLogCode.NU3001, Strings.SignedPackagePackageAlreadySigned);
}
using (var reader = new BinaryReader(ZipReadStream, SigningSpecifications.Encoding, leaveOpen: true))
using (var writer = new BinaryWriter(ZipWriteStream, SigningSpecifications.Encoding, leaveOpen: true))
{
SignedPackageArchiveUtility.SignZip((MemoryStream)signatureStream, reader, writer);
}
}
