internal void Decode(ReadOnlyMemory <byte> encodedMessage)
{
AsnValueReader reader = new AsnValueReader(encodedMessage.Span, AsnEncodingRules.BER);
// Windows (and thus NetFx) reads the leading data and ignores extra.
// So use the Decode overload which doesn't throw on extra data.
ContentInfoAsn.Decode(
ref reader,
encodedMessage,
out ContentInfoAsn contentInfo);
if (contentInfo.ContentType != Oids.Pkcs7Signed)
{
throw new CryptographicException(SR.Cryptography_Cms_InvalidMessageType);
}
// Hold a copy of the SignedData memory so we are protected against memory reuse by the caller.
_heldData = contentInfo.Content.ToArray();
_signedData = SignedDataAsn.Decode(_heldData, AsnEncodingRules.BER);
_contentType = _signedData.EncapContentInfo.ContentType;
_hasPkcs7Content = false;
if (!Detached)
{
ReadOnlyMemory <byte>?content = _signedData.EncapContentInfo.Content;
ReadOnlyMemory <byte> contentValue;
if (content.HasValue)
{
contentValue = GetContent(content.Value, _contentType);
// If no OCTET STRING was stripped off, we have PKCS7 interop concerns.
_hasPkcs7Content = content.Value.Length == contentValue.Length;
}
else
{
contentValue = ReadOnlyMemory <byte> .Empty;
}
// This is in _heldData, so we don't need a defensive copy.
_heldContent = contentValue;
// The ContentInfo object/property DOES need a defensive copy, because
// a) it is mutable by the user, and
// b) it is no longer authoritative
//
// (and c: it takes a byte[] and we have a ReadOnlyMemory<byte>)
ContentInfo = new ContentInfo(new Oid(_contentType), contentValue.ToArray());
}
else
{
// Hold a defensive copy of the content bytes, (Windows/NetFx compat)
_heldContent = ContentInfo.Content.CloneByteArray();
}
Version = _signedData.Version;
_hasData = true;
}
private void WithSelfInfo(WithSelfInfoDelegate action)
{
if (_parentSignerInfo == null)
{
int myIdx = _document.SignerInfos.FindIndexForSigner(this);
if (myIdx < 0)
{
throw new CryptographicException(SR.Cryptography_Cms_SignerNotFound);
}
ref SignedDataAsn signedData = ref _document.GetRawData();
ref SignerInfoAsn mySigner = ref signedData.SignerInfos[myIdx];
public void Decode(byte[] encodedMessage)
{
if (encodedMessage == null)
{
throw new ArgumentNullException(nameof(encodedMessage));
}
// Windows (and thus NetFx) reads the leading data and ignores extra.
// The deserializer will complain if too much data is given, so use the reader
// to ask how much we want to deserialize.
AsnReader reader = new AsnReader(encodedMessage, AsnEncodingRules.BER);
ReadOnlyMemory <byte> cmsSegment = reader.GetEncodedValue();
ContentInfoAsn contentInfo = AsnSerializer.Deserialize <ContentInfoAsn>(cmsSegment, AsnEncodingRules.BER);
if (contentInfo.ContentType != Oids.Pkcs7Signed)
{
throw new CryptographicException(SR.Cryptography_Cms_InvalidMessageType);
}
// Hold a copy of the SignedData memory so we are protected against memory reuse by the caller.
_heldData = contentInfo.Content.ToArray();
_signedData = AsnSerializer.Deserialize <SignedDataAsn>(_heldData, AsnEncodingRules.BER);
_contentType = _signedData.EncapContentInfo.ContentType;
if (!Detached)
{
ReadOnlyMemory <byte>?content = _signedData.EncapContentInfo.Content;
// This is in _heldData, so we don't need a defensive copy.
_heldContent = content ?? ReadOnlyMemory <byte> .Empty;
// The ContentInfo object/property DOES need a defensive copy, because
// a) it is mutable by the user, and
// b) it is no longer authoritative
//
// (and c: it takes a byte[] and we have a ReadOnlyMemory<byte>)
ContentInfo = new ContentInfo(new Oid(_contentType), _heldContent.Value.ToArray());
}
else
{
// Hold a defensive copy of the content bytes, (Windows/NetFx compat)
_heldContent = ContentInfo.Content.CloneByteArray();
}
Version = _signedData.Version;
_hasData = true;
}
public byte[] Encode()
{
if (!_hasData)
{
throw new InvalidOperationException(SR.Cryptography_Cms_MessageNotSigned);
}
try
{
using (AsnWriter writer = new AsnWriter(AsnEncodingRules.DER))
{
_signedData.Encode(writer);
return(PkcsHelpers.EncodeContentInfo(writer.Encode(), Oids.Pkcs7Signed));
}
}
catch (CryptographicException) when(!Detached)
{
// If we can't write the contents back out then the most likely culprit is an
// indefinite length encoding in the content field. To preserve as much input data
// as possible while still maintaining our expectations of sorting any SET OF values,
// do the following:
// * Write the DER normalized version of the SignedData in detached mode.
// * BER-decode that structure
// * Copy the content field over
// * BER-write the modified structure.
SignedDataAsn copy = _signedData;
copy.EncapContentInfo.Content = null;
Debug.Assert(_signedData.EncapContentInfo.Content != null);
using (AsnWriter detachedWriter = new AsnWriter(AsnEncodingRules.DER))
{
copy.Encode(detachedWriter);
copy = SignedDataAsn.Decode(detachedWriter.Encode(), AsnEncodingRules.BER);
}
copy.EncapContentInfo.Content = _signedData.EncapContentInfo.Content;
using (AsnWriter attachedWriter = new AsnWriter(AsnEncodingRules.BER))
{
copy.Encode(attachedWriter);
return(PkcsHelpers.EncodeContentInfo(attachedWriter.Encode(), Oids.Pkcs7Signed));
}
}
}
internal void Decode(ReadOnlyMemory <byte> encodedMessage)
{
// Windows (and thus NetFx) reads the leading data and ignores extra.
// So use the Deserialize overload which doesn't throw on extra data.
ContentInfoAsn contentInfo = AsnSerializer.Deserialize <ContentInfoAsn>(
encodedMessage,
AsnEncodingRules.BER,
out int bytesRead);
if (contentInfo.ContentType != Oids.Pkcs7Signed)
{
throw new CryptographicException(SR.Cryptography_Cms_InvalidMessageType);
}
// Hold a copy of the SignedData memory so we are protected against memory reuse by the caller.
_heldData = contentInfo.Content.ToArray();
_signedData = AsnSerializer.Deserialize <SignedDataAsn>(_heldData, AsnEncodingRules.BER);
_contentType = _signedData.EncapContentInfo.ContentType;
if (!Detached)
{
ReadOnlyMemory <byte>?content = _signedData.EncapContentInfo.Content;
// This is in _heldData, so we don't need a defensive copy.
_heldContent = content ?? ReadOnlyMemory <byte> .Empty;
// The ContentInfo object/property DOES need a defensive copy, because
// a) it is mutable by the user, and
// b) it is no longer authoritative
//
// (and c: it takes a byte[] and we have a ReadOnlyMemory<byte>)
ContentInfo = new ContentInfo(new Oid(_contentType), _heldContent.Value.ToArray());
}
else
{
// Hold a defensive copy of the content bytes, (Windows/NetFx compat)
_heldContent = ContentInfo.Content.CloneByteArray();
}
Version = _signedData.Version;
_hasData = true;
}
public void Decode(ReadOnlySpan <byte> encodedMessage)
{
// Hold a copy of the SignedData memory so we are protected against memory reuse by the caller.
_heldData = CopyContent(encodedMessage);
_signedData = SignedDataAsn.Decode(_heldData, AsnEncodingRules.BER);
_contentType = _signedData.EncapContentInfo.ContentType;
_hasPkcs7Content = false;
if (!Detached)
{
ReadOnlyMemory <byte>?content = _signedData.EncapContentInfo.Content;
ReadOnlyMemory <byte> contentValue;
if (content.HasValue)
{
contentValue = GetContent(content.Value, _contentType);
// If no OCTET STRING was stripped off, we have PKCS7 interop concerns.
_hasPkcs7Content = content.Value.Length == contentValue.Length;
}
else
{
contentValue = ReadOnlyMemory <byte> .Empty;
}
// This is in _heldData, so we don't need a defensive copy.
_heldContent = contentValue;
// The ContentInfo object/property DOES need a defensive copy, because
// a) it is mutable by the user, and
// b) it is no longer authoritative
//
// (and c: it takes a byte[] and we have a ReadOnlyMemory<byte>)
ContentInfo = new ContentInfo(new Oid(_contentType), contentValue.ToArray());
}
else
{
// Hold a defensive copy of the content bytes, (Windows/NetFx compat)
_heldContent = ContentInfo.Content.CloneByteArray();
}
Version = _signedData.Version;
_hasData = true;
public void ComputeSignature(CmsSigner signer, bool silent)
{
if (signer == null)
{
throw new ArgumentNullException(nameof(signer));
}
// While it shouldn't be possible to change the length of ContentInfo.Content
// after it's built, use the property at this stage, then use the saved value
// (if applicable) after this point.
if (ContentInfo.Content.Length == 0)
{
throw new CryptographicException(SR.Cryptography_Cms_Sign_Empty_Content);
}
if (_hasData && signer.SignerIdentifierType == SubjectIdentifierType.NoSignature)
{
// Even if all signers have been removed, throw if doing a NoSignature signature
// on a loaded (from file, or from first signature) document.
//
// This matches the .NET Framework behavior.
throw new CryptographicException(SR.Cryptography_Cms_Sign_No_Signature_First_Signer);
}
if (signer.Certificate == null && signer.SignerIdentifierType != SubjectIdentifierType.NoSignature)
{
if (silent)
{
// .NET Framework compatibility, silent disallows prompting, so throws InvalidOperationException
// in this state.
//
// The message is different than on NetFX, because the resource string was for
// enveloped CMS recipients (and the other site which would use that resource
// is unreachable code due to CmsRecipient's ctor guarding against null certificates)
throw new InvalidOperationException(SR.Cryptography_Cms_NoSignerCertSilent);
}
// Otherwise, PNSE. .NET Core doesn't support launching the cert picker UI.
throw new PlatformNotSupportedException(SR.Cryptography_Cms_NoSignerCert);
}
// If we had content already, use that now.
// (The second signer doesn't inherit edits to signedCms.ContentInfo.Content)
ReadOnlyMemory <byte> content = _heldContent ?? ContentInfo.Content;
string contentType = _contentType ?? ContentInfo.ContentType.Value ?? Oids.Pkcs7Data;
X509Certificate2Collection chainCerts;
SignerInfoAsn newSigner = signer.Sign(content, contentType, silent, out chainCerts);
bool firstSigner = false;
if (!_hasData)
{
firstSigner = true;
_signedData = new SignedDataAsn
{
DigestAlgorithms = Array.Empty <AlgorithmIdentifierAsn>(),
SignerInfos = Array.Empty <SignerInfoAsn>(),
EncapContentInfo = new EncapsulatedContentInfoAsn {
ContentType = contentType
},
};
// Since we're going to call Decode before this method exits we don't need to save
// the copy of _heldContent or _contentType here if we're attached.
if (!Detached)
{
using (AsnWriter writer = new AsnWriter(AsnEncodingRules.DER))
{
writer.WriteOctetString(content.Span);
_signedData.EncapContentInfo.Content = writer.Encode();
}
}
_hasData = true;
}
int newIdx = _signedData.SignerInfos.Length;
Array.Resize(ref _signedData.SignerInfos, newIdx + 1);
_signedData.SignerInfos[newIdx] = newSigner;
UpdateCertificatesFromAddition(chainCerts);
ConsiderDigestAddition(newSigner.DigestAlgorithm);
UpdateMetadata();
if (firstSigner)
{
Reencode();
Debug.Assert(_heldContent != null);
Debug.Assert(_contentType == contentType);
}
}
public void ComputeSignature(CmsSigner signer, bool silent)
{
if (signer == null)
{
throw new ArgumentNullException(nameof(signer));
}
// While it shouldn't be possible to change the length of ContentInfo.Content
// after it's built, use the property at this stage, then use the saved value
// (if applicable) after this point.
if (ContentInfo.Content.Length == 0)
{
throw new CryptographicException(SR.Cryptography_Cms_Sign_Empty_Content);
}
// If we had content already, use that now.
// (The second signer doesn't inherit edits to signedCms.ContentInfo.Content)
ReadOnlyMemory <byte> content = _heldContent ?? ContentInfo.Content;
string contentType = _contentType ?? ContentInfo.ContentType.Value ?? Oids.Pkcs7Data;
X509Certificate2Collection chainCerts;
SignerInfoAsn newSigner = signer.Sign(content, contentType, silent, out chainCerts);
bool firstSigner = false;
if (!_hasData)
{
firstSigner = true;
_signedData = new SignedDataAsn
{
DigestAlgorithms = Array.Empty <AlgorithmIdentifierAsn>(),
SignerInfos = Array.Empty <SignerInfoAsn>(),
EncapContentInfo = new EncapsulatedContentInfoAsn {
ContentType = contentType
},
};
// Since we're going to call Decode before this method exits we don't need to save
// the copy of _heldContent or _contentType here if we're attached.
if (!Detached)
{
using (AsnWriter writer = new AsnWriter(AsnEncodingRules.DER))
{
writer.WriteOctetString(content.Span);
_signedData.EncapContentInfo.Content = writer.Encode();
}
}
_hasData = true;
}
int newIdx = _signedData.SignerInfos.Length;
Array.Resize(ref _signedData.SignerInfos, newIdx + 1);
_signedData.SignerInfos[newIdx] = newSigner;
UpdateCertificatesFromAddition(chainCerts);
ConsiderDigestAddition(newSigner.DigestAlgorithm);
UpdateMetadata();
if (firstSigner)
{
Reencode();
Debug.Assert(_heldContent != null);
Debug.Assert(_contentType == contentType);
}
}
public static Pkcs12Info Decode(
ReadOnlyMemory <byte> encodedBytes,
out int bytesConsumed,
bool skipCopy = false)
{
AsnReader reader = new AsnReader(encodedBytes, AsnEncodingRules.BER);
// Trim it to the first value
encodedBytes = reader.PeekEncodedValue();
ReadOnlyMemory <byte> maybeCopy = skipCopy ? encodedBytes : encodedBytes.ToArray();
PfxAsn pfx = PfxAsn.Decode(maybeCopy, AsnEncodingRules.BER);
// https://tools.ietf.org/html/rfc7292#section-4 only defines version 3.
if (pfx.Version != 3)
{
throw new CryptographicException(SR.Cryptography_Der_Invalid_Encoding);
}
ReadOnlyMemory <byte> authSafeBytes = ReadOnlyMemory <byte> .Empty;
Pkcs12IntegrityMode mode = Pkcs12IntegrityMode.Unknown;
if (pfx.AuthSafe.ContentType == Oids.Pkcs7Data)
{
authSafeBytes = PkcsHelpers.DecodeOctetStringAsMemory(pfx.AuthSafe.Content);
if (pfx.MacData.HasValue)
{
mode = Pkcs12IntegrityMode.Password;
}
else
{
mode = Pkcs12IntegrityMode.None;
}
}
else if (pfx.AuthSafe.ContentType == Oids.Pkcs7Signed)
{
SignedDataAsn signedData = SignedDataAsn.Decode(pfx.AuthSafe.Content, AsnEncodingRules.BER);
mode = Pkcs12IntegrityMode.PublicKey;
if (signedData.EncapContentInfo.ContentType == Oids.Pkcs7Data)
{
authSafeBytes = signedData.EncapContentInfo.Content.GetValueOrDefault();
}
if (pfx.MacData.HasValue)
{
throw new CryptographicException(SR.Cryptography_Der_Invalid_Encoding);
}
}
if (mode == Pkcs12IntegrityMode.Unknown)
{
throw new CryptographicException(SR.Cryptography_Der_Invalid_Encoding);
}
List <ContentInfoAsn> authSafeData = new List <ContentInfoAsn>();
AsnReader authSafeReader = new AsnReader(authSafeBytes, AsnEncodingRules.BER);
AsnReader sequenceReader = authSafeReader.ReadSequence();
authSafeReader.ThrowIfNotEmpty();
while (sequenceReader.HasData)
{
ContentInfoAsn.Decode(sequenceReader, out ContentInfoAsn contentInfo);
authSafeData.Add(contentInfo);
}
ReadOnlyCollection <Pkcs12SafeContents> authSafe;
if (authSafeData.Count == 0)
{
authSafe = new ReadOnlyCollection <Pkcs12SafeContents>(Array.Empty <Pkcs12SafeContents>());
}
else
{
Pkcs12SafeContents[] contentsArray = new Pkcs12SafeContents[authSafeData.Count];
for (int i = 0; i < contentsArray.Length; i++)
{
contentsArray[i] = new Pkcs12SafeContents(authSafeData[i]);
}
authSafe = new ReadOnlyCollection <Pkcs12SafeContents>(contentsArray);
}
bytesConsumed = encodedBytes.Length;
return(new Pkcs12Info
{
AuthenticatedSafe = authSafe,
IntegrityMode = mode,
_decoded = pfx,
_authSafeContents = authSafeBytes,
});
}
