private void TestSimpleDecrypt_RoundTrip(CertLoader certLoader, ContentInfo contentInfo, string algorithmOidValue, SubjectIdentifierType type, ContentInfo expectedContentInfo = null)
{
// Deep-copy the contentInfo since the real ContentInfo doesn't do this. This defends against a bad implementation changing
// our "expectedContentInfo" to match what it produces.
expectedContentInfo = expectedContentInfo ?? new ContentInfo(new Oid(contentInfo.ContentType), (byte[])(contentInfo.Content.Clone()));
string certSubjectName;
byte[] encodedMessage;
byte[] originalCopy = (byte[])(contentInfo.Content.Clone());
using (X509Certificate2 certificate = certLoader.GetCertificate())
{
certSubjectName = certificate.Subject;
AlgorithmIdentifier alg = new AlgorithmIdentifier(new Oid(algorithmOidValue));
EnvelopedCms ecms = new EnvelopedCms(contentInfo, alg);
CmsRecipient cmsRecipient = new CmsRecipient(type, certificate);
ecms.Encrypt(cmsRecipient);
Assert.Equal(originalCopy.ByteArrayToHex(), ecms.ContentInfo.Content.ByteArrayToHex());
encodedMessage = ecms.Encode();
}
// We don't pass "certificate" down because it's expected that the certificate used for encrypting doesn't have a private key (part of the purpose of this test is
// to ensure that you don't need the recipient's private key to encrypt.) The decrypt phase will have to locate the matching cert with the private key.
VerifySimpleDecrypt(encodedMessage, certLoader, expectedContentInfo);
}
private void VerifySimpleDecrypt(byte[] encodedMessage, CertLoader certLoader, ContentInfo expectedContent)
{
EnvelopedCms ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
using (X509Certificate2 cert = certLoader.TryGetCertificateWithPrivateKey())
{
if (cert == null)
{
return; // Sorry - CertLoader is not configured to load certs with private keys - we've tested as much as we can.
}
#if netcoreapp // API not present on netfx
if (_useExplicitPrivateKey)
{
using (X509Certificate2 pubCert = certLoader.GetCertificate())
{
RecipientInfo recipient = ecms.RecipientInfos.Cast <RecipientInfo>().Where((r) => r.RecipientIdentifier.MatchesCertificate(cert)).Single();
ecms.Decrypt(recipient, cert.PrivateKey);
}
}
else
#endif
{
X509Certificate2Collection extraStore = new X509Certificate2Collection(cert);
ecms.Decrypt(extraStore);
}
ContentInfo contentInfo = ecms.ContentInfo;
Assert.Equal(expectedContent.ContentType.Value, contentInfo.ContentType.Value);
Assert.Equal(expectedContent.Content.ByteArrayToHex(), contentInfo.Content.ByteArrayToHex());
}
}
public static void TwoEkuExtensions(X509IncludeOption includeOption)
{
CertLoader loader = Certificates.TwoEkuTsaCert;
DateTimeOffset referenceTime;
using (X509Certificate2 cert = loader.GetCertificate())
{
referenceTime = cert.NotAfter.AddDays(-1);
var ekuExts = cert.Extensions.OfType <X509EnhancedKeyUsageExtension>().ToList();
Assert.Equal(2, ekuExts.Count);
// Make sure we're validating that "early success" doesn't happen.
Assert.Contains(
Oids.TimeStampingPurpose,
ekuExts[0].EnhancedKeyUsages.OfType <Oid>().Select(o => o.Value));
}
CustomBuild_CertMismatch(
loader,
referenceTime,
SigningCertificateOption.ValidHashNoName,
SigningCertificateOption.Omit,
includeOption: includeOption);
}
private static void Assert_Certificate_Roundtrip(CertLoader certificateLoader)
{
ContentInfo contentInfo = new ContentInfo(new byte[] { 1, 2, 3 });
EnvelopedCms ecms = new EnvelopedCms(contentInfo);
using (X509Certificate2 cert = certificateLoader.GetCertificate())
{
CmsRecipient recipient = new CmsRecipient(cert);
ecms.Encrypt(recipient);
}
byte[] encodedMessage = ecms.Encode();
ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
using (X509Certificate2 privateCert = certificateLoader.TryGetCertificateWithPrivateKey())
{
if (privateCert == null)
{
return; // CertLoader can't load the private certificate.
}
ecms.Decrypt(new X509Certificate2Collection(privateCert));
}
Assert.Equal(contentInfo.ContentType.Value, ecms.ContentInfo.ContentType.Value);
Assert.Equal <byte>(contentInfo.Content, ecms.ContentInfo.Content);
}
private static KeyTransRecipientInfo EncodeKeyTransl_Rsa2048(RSAEncryptionPadding encryptionPadding, CertLoader loader)
{
ContentInfo contentInfo = new ContentInfo(new byte[] { 1, 2, 3 });
EnvelopedCms ecms = new EnvelopedCms(contentInfo);
using (X509Certificate2 cert = loader.GetCertificate())
{
CmsRecipient cmsRecipient;
if (encryptionPadding is null)
{
cmsRecipient = new CmsRecipient(cert);
}
else
{
cmsRecipient = new CmsRecipient(cert, encryptionPadding);
}
ecms.Encrypt(cmsRecipient);
}
byte[] encodedMessage = ecms.Encode();
EnvelopedCms ecms2 = new EnvelopedCms();
ecms2.Decode(encodedMessage);
RecipientInfoCollection recipients = ecms2.RecipientInfos;
Assert.Equal(1, recipients.Count);
RecipientInfo recipientInfo = recipients[0];
Assert.IsType <KeyTransRecipientInfo>(recipientInfo);
return((KeyTransRecipientInfo)recipientInfo);
}
public static void NoTsaEku(X509IncludeOption includeOption)
{
CertLoader loader = Certificates.TlsClientServerCert;
DateTimeOffset referenceTime;
using (X509Certificate2 cert = loader.GetCertificate())
{
referenceTime = cert.NotAfter.AddDays(-1);
}
CustomBuild_CertMismatch(
loader,
referenceTime,
SigningCertificateOption.ValidHashNoName,
SigningCertificateOption.Omit,
includeOption: includeOption);
}
public static void TimestampTooNew(X509IncludeOption includeOption)
{
CertLoader loader = Certificates.ValidLookingTsaCert;
DateTimeOffset referenceTime;
using (X509Certificate2 cert = loader.GetCertificate())
{
referenceTime = cert.NotAfter.AddSeconds(1);
}
CustomBuild_CertMismatch(
loader,
referenceTime,
SigningCertificateOption.ValidHashNoName,
SigningCertificateOption.Omit,
includeOption: includeOption);
}
public void EncryptToNegativeSerialNumber()
{
CertLoader negativeSerial = Certificates.NegativeSerialNumber;
const string expectedSerial = "FD319CB1514B06AF49E00522277E43C8";
byte[] content = { 1, 2, 3 };
ContentInfo contentInfo = new ContentInfo(content);
EnvelopedCms cms = new EnvelopedCms(contentInfo);
using (X509Certificate2 cert = negativeSerial.GetCertificate())
{
Assert.Equal(expectedSerial, cert.SerialNumber);
CmsRecipient recipient = new CmsRecipient(SubjectIdentifierType.IssuerAndSerialNumber, cert);
cms.Encrypt(recipient);
}
EnvelopedCms cms2 = new EnvelopedCms();
cms2.Decode(cms.Encode());
RecipientInfoCollection recipients = cms2.RecipientInfos;
Assert.Equal(1, recipients.Count);
RecipientInfo recipientInfo = recipients[0];
Assert.Equal(SubjectIdentifierType.IssuerAndSerialNumber, recipientInfo.RecipientIdentifier.Type);
X509IssuerSerial issuerSerial = (X509IssuerSerial)recipientInfo.RecipientIdentifier.Value;
Assert.Equal(expectedSerial, issuerSerial.SerialNumber);
using (X509Certificate2 cert = negativeSerial.TryGetCertificateWithPrivateKey())
{
Assert.Equal(expectedSerial, cert.SerialNumber);
cms2.Decrypt(new X509Certificate2Collection(cert));
}
Assert.Equal(content, cms2.ContentInfo.Content);
}
public static void NoEkuExtension(X509IncludeOption includeOption)
{
CertLoader loader = Certificates.RSA2048SignatureOnly;
DateTimeOffset referenceTime;
using (X509Certificate2 cert = loader.GetCertificate())
{
referenceTime = cert.NotAfter.AddDays(-1);
Assert.Equal(0, cert.Extensions.OfType <X509EnhancedKeyUsageExtension>().Count());
}
CustomBuild_CertMismatch(
loader,
referenceTime,
SigningCertificateOption.ValidHashNoName,
SigningCertificateOption.Omit,
includeOption: includeOption);
}
public static void NonCriticalEkuExtension(X509IncludeOption includeOption)
{
CertLoader loader = Certificates.NonCriticalTsaEku;
DateTimeOffset referenceTime;
using (X509Certificate2 cert = loader.GetCertificate())
{
referenceTime = cert.NotAfter.AddDays(-1);
var ekuExts = cert.Extensions.OfType <X509EnhancedKeyUsageExtension>().ToList();
Assert.Equal(1, ekuExts.Count);
Assert.False(ekuExts[0].Critical, "ekuExts[0].Critical");
}
CustomBuild_CertMismatch(
loader,
referenceTime,
SigningCertificateOption.ValidHashNoName,
SigningCertificateOption.Omit,
includeOption: includeOption);
}
private static void CustomBuild_CertMismatch(
CertLoader loader,
DateTimeOffset referenceTime,
SigningCertificateOption v1Option,
SigningCertificateOption v2Option,
HashAlgorithmName v2AlgorithmName = default,
X509IncludeOption includeOption = default,
SubjectIdentifierType identifierType = SubjectIdentifierType.IssuerAndSerialNumber)
{
byte[] tokenBytes = BuildCustomToken(
loader,
referenceTime,
v1Option,
v2Option,
v2AlgorithmName,
includeOption,
identifierType);
Rfc3161TimestampToken token;
bool willParse = includeOption == X509IncludeOption.None;
if (willParse && identifierType == SubjectIdentifierType.IssuerAndSerialNumber)
{
// Because IASN matches against the ESSCertId(V2) directly it will reject the token.
switch (v1Option)
{
case SigningCertificateOption.ValidHashWithInvalidName:
case SigningCertificateOption.ValidHashWithInvalidSerial:
case SigningCertificateOption.InvalidHashWithInvalidName:
case SigningCertificateOption.InvalidHashWithInvalidSerial:
willParse = false;
break;
}
switch (v2Option)
{
case SigningCertificateOption.ValidHashWithInvalidName:
case SigningCertificateOption.ValidHashWithInvalidSerial:
case SigningCertificateOption.InvalidHashWithInvalidName:
case SigningCertificateOption.InvalidHashWithInvalidSerial:
willParse = false;
break;
}
}
if (willParse)
{
Assert.True(Rfc3161TimestampToken.TryDecode(tokenBytes, out token, out int bytesRead));
Assert.NotNull(token);
Assert.Equal(tokenBytes.Length, bytesRead);
using (X509Certificate2 cert = loader.GetCertificate())
{
Assert.False(
token.VerifySignatureForHash(
token.TokenInfo.GetMessageHash().Span,
token.TokenInfo.HashAlgorithmId,
out X509Certificate2 signer,
new X509Certificate2Collection(cert)));
Assert.Null(signer);
}
}
else
{
Assert.False(Rfc3161TimestampToken.TryDecode(tokenBytes, out token, out int bytesRead));
Assert.Null(token);
Assert.Equal(0, bytesRead);
}
}