| public Decode ( byte encodedMessage ) : void | ||
| encodedMessage | byte | |
| Résultat | void | |
public static void Rc4AndCngWrappersDontMixTest()
{
//
// Combination of RC4 over a CAPI certificate.
//
// This works as long as the PKCS implementation opens the cert using CAPI. If he creates a CNG wrapper handle (by passing CRYPT_ACQUIRE_PREFER_NCRYPT_KEY_FLAG),
// the test fails with a NOTSUPPORTED crypto exception inside Decrypt(). The same happens if the key is genuinely CNG.
//
byte[] content = { 6, 3, 128, 33, 44 };
AlgorithmIdentifier rc4 = new AlgorithmIdentifier(new Oid(Oids.Rc4));
EnvelopedCms ecms = new EnvelopedCms(new ContentInfo(content), rc4);
CmsRecipientCollection recipients = new CmsRecipientCollection(new CmsRecipient(Certificates.RSAKeyTransferCapi1.GetCertificate()));
ecms.Encrypt(recipients);
byte[] encodedMessage = ecms.Encode();
ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
using (X509Certificate2 cert = Certificates.RSAKeyTransferCapi1.TryGetCertificateWithPrivateKey())
{
if (cert == null)
return; // Sorry - CertLoader is not configured to load certs with private keys - we've tested as much as we can.
X509Certificate2Collection extraStore = new X509Certificate2Collection();
extraStore.Add(cert);
ecms.Decrypt(extraStore);
}
ContentInfo contentInfo = ecms.ContentInfo;
Assert.Equal<byte>(content, contentInfo.Content);
}
private static void VerifyCertificates0(byte[] encodedMessage)
{
EnvelopedCms ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
X509Certificate2Collection certs = ecms.Certificates;
Assert.Equal(0, certs.Count);
}
private static void VerifyUnprotectedAttributes0(byte[] encodedMessage)
{
EnvelopedCms ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
AsnEncodedData[] attributes = ecms.UnprotectedAttributes.FlattenAndSort();
Assert.Equal(0, attributes.Length);
}
public static void ImportEdgeCase()
{
//
// Pfx's imported into a certificate collection propagate their "delete on Dispose" behavior to its cloned instances:
// a subtle difference from Pfx's created using the X509Certificate2 constructor that can lead to premature or
// double key deletion. Since EnvelopeCms.Decrypt() has no legitimate reason to clone the extraStore certs, this shouldn't
// be a problem, but this test will verify that it isn't.
//
byte[] encodedMessage =
("3082010c06092a864886f70d010703a081fe3081fb0201003181c83081c5020100302e301a311830160603550403130f5253"
+ "414b65795472616e7366657231021031d935fb63e8cfab48a0bf7b397b67c0300d06092a864886f70d01010105000481805e"
+ "bb2d08773594be9ec5d30c0707cf339f2b982a4f0797b74d520a0c973d668a9a6ad9d28066ef36e5b5620fef67f4d79ee50c"
+ "25eb999f0c656548347d5676ac4b779f8fce2b87e6388fbe483bb0fcf78ab1f1ff29169600401fded7b2803a0bf96cc160c4"
+ "96726216e986869eed578bda652855c85604a056201538ee56b6c4302b06092a864886f70d010701301406082a864886f70d"
+ "030704083adadf63cd297a86800835edc437e31d0b70").HexToByteArray();
EnvelopedCms ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
using (X509Certificate2 cert = Certificates.RSAKeyTransfer1.LoadPfxUsingCollectionImport())
{
X509Certificate2Collection extraStore = new X509Certificate2Collection(cert);
ecms.Decrypt(extraStore);
byte[] expectedContent = { 1, 2, 3 };
ContentInfo contentInfo = ecms.ContentInfo;
Assert.Equal<byte>(expectedContent, contentInfo.Content);
}
}
private static void VerifyVersion0(byte[] encodedMessage)
{
EnvelopedCms ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
int version = ecms.Version;
Assert.Equal(0, version);
}
private static void VerifyUnprotectedAttributes1_DocumentDescription(byte[] encodedMessage)
{
EnvelopedCms ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
AsnEncodedData[] attributes = ecms.UnprotectedAttributes.FlattenAndSort();
Assert.Equal(1, attributes.Length);
attributes[0].AssertIsDocumentationDescription("My Description");
}
private static void VerifyAlgorithmRc2_128(byte[] encodedMessage)
{
EnvelopedCms ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
AlgorithmIdentifier algorithm = ecms.ContentEncryptionAlgorithm;
Assert.NotNull(algorithm.Oid);
Assert.Equal(Oids.Rc2, algorithm.Oid.Value);
Assert.Equal(128, algorithm.KeyLength);
}
public static string DecryptEnvelop(string base64EncryptedString)
{
var encryptedBytes = Convert.FromBase64String(base64EncryptedString);
var envelope = new EnvelopedCms();
envelope.Decode(encryptedBytes);
var store = new X509Store(StoreName.My, StoreLocation.LocalMachine);
store.Open(OpenFlags.ReadOnly);
envelope.Decrypt(store.Certificates);
return Encoding.UTF8.GetString(envelope.ContentInfo.Content);
}
public static string Decrypt(string encryptedString)
{
// パスワードを復号
var store = new X509Store(StoreLocation.LocalMachine); // (StoreLocation.LocalMachine);
store.Open(OpenFlags.ReadOnly);
var encPasswordBase64 = Convert.FromBase64String(encryptedString);
var enveloped = new EnvelopedCms();
enveloped.Decode(encPasswordBase64);
enveloped.Decrypt(store.Certificates);
return Encoding.UTF8.GetString(enveloped.ContentInfo.Content);
}
/// <summary>
/// Decrypts enveloped mime content.
/// </summary>
/// <param name="cert">Decrypting certificate.</param>
/// <returns>Returns decrypted enveloped mime content.</returns>
/// <exception cref="ArgumentNullException">Is raised when <b>cert</b> is null reference.</exception>
/// <exception cref="InvalidOperationException">Is raised when <b>smime-type != enveloped-data</b>.</exception>
public MIME_Message GetEnvelopedMime(X509Certificate2 cert)
{
if(cert == null){
throw new ArgumentNullException("cert");
}
if(!string.Equals(this.Entity.ContentType.Parameters["smime-type"],"enveloped-data",StringComparison.InvariantCultureIgnoreCase)){
throw new InvalidOperationException("The VerifySignature method is only valid if Content-Type parameter smime-type=enveloped-data.");
}
EnvelopedCms envelopedCms = new EnvelopedCms();
envelopedCms.Decode(this.Data);
X509Certificate2Collection certificates = new X509Certificate2Collection(cert);
envelopedCms.Decrypt(certificates);
return MIME_Message.ParseFromStream(new MemoryStream(envelopedCms.Encode()));
}
/// <summary>
/// Decrypts the specified string.
/// </summary>
/// <param name="ciphertext">The ciphertext to be decrypted.</param>
/// <param name="certificates">A set of certificates containing the one that was used to encrypt the ciphertext.</param>
/// <returns>The decrypted text.</returns>
public static string Decrypt(this string ciphertext, params X509Certificate2[] certificates)
{
var store = new X509Store(StoreName.My, StoreLocation.LocalMachine);
store.Open(OpenFlags.ReadOnly);
var certCollection = store.Certificates;
if (certificates != null && certificates.Length > 0)
{
certCollection.AddRange(certificates);
}
var envelopedCms = new EnvelopedCms();
envelopedCms.Decode(Convert.FromBase64String(ciphertext));
envelopedCms.Decrypt(certCollection);
return Encoding.UTF8.GetString(envelopedCms.ContentInfo.Content);
}
public static void ImportEdgeCaseSki()
{
byte[] encodedMessage =
("3081f206092a864886f70d010703a081e43081e10201023181ae3081ab0201028014f2008aa9fa3742e8370cb1674ce1d158"
+ "2921dcc3300d06092a864886f70d01010105000481804336e978bc72ba2f5264cd854867fac438f36f2b3df6004528f2df83"
+ "4fb2113d6f7c07667e7296b029756222d6ced396a8fffed32be838eec7f2e54b9467fa80f85d097f7d1f0fbde57e07ab3d46"
+ "a60b31f37ef9844dcab2a8eef4fec5579fac5ec1e7ee82409898e17d30c3ac1a407fca15d23c9df2904a707294d78d4300ba"
+ "302b06092a864886f70d010701301406082a864886f70d03070408355c596e3e8540608008f1f811e862e51bbd").HexToByteArray();
EnvelopedCms ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
using (X509Certificate2 cert = Certificates.RSAKeyTransfer1.LoadPfxUsingCollectionImport())
{
X509Certificate2Collection extraStore = new X509Certificate2Collection(cert);
ecms.Decrypt(extraStore);
byte[] expectedContent = { 1, 2, 3 };
ContentInfo contentInfo = ecms.ContentInfo;
Assert.Equal<byte>(new byte[] { 1, 2, 3 }, contentInfo.Content);
Assert.Equal<byte>(expectedContent, contentInfo.Content);
}
}
public static void ReuseEnvelopeCmsEncodeThenDecode()
{
// Test ability to encrypt, encode and decode all in one EnvelopedCms instance.
ContentInfo contentInfo = new ContentInfo(new byte[] { 1, 2, 3 });
EnvelopedCms ecms = new EnvelopedCms(contentInfo);
using (X509Certificate2 cert = Certificates.RSAKeyTransfer1.GetCertificate())
{
CmsRecipient cmsRecipient = new CmsRecipient(cert);
ecms.Encrypt(cmsRecipient);
}
byte[] encodedMessage = ecms.Encode();
ecms.Decode(encodedMessage);
RecipientInfoCollection recipients = ecms.RecipientInfos;
Assert.Equal(1, recipients.Count);
RecipientInfo recipientInfo = recipients[0];
KeyTransRecipientInfo recipient = recipientInfo as KeyTransRecipientInfo;
Assert.NotNull(recipientInfo);
SubjectIdentifier subjectIdentifier = recipient.RecipientIdentifier;
object value = subjectIdentifier.Value;
Assert.True(value is X509IssuerSerial);
X509IssuerSerial xis = (X509IssuerSerial)value;
Assert.Equal("CN=RSAKeyTransfer1", xis.IssuerName);
Assert.Equal("31D935FB63E8CFAB48A0BF7B397B67C0", xis.SerialNumber);
}
/// <summary>
/// Decrypt the encrypted data.
/// </summary>
/// <remarks>
/// Decrypt the encrypted data.
/// </remarks>
/// <returns>The decrypted <see cref="MimeKit.MimeEntity"/>.</returns>
/// <param name="encryptedData">The encrypted data.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="encryptedData"/> is <c>null</c>.
/// </exception>
/// <exception cref="System.Security.Cryptography.CryptographicException">
/// An error occurred in the cryptographic message syntax subsystem.
/// </exception>
public override MimeEntity Decrypt (Stream encryptedData)
{
if (encryptedData == null)
throw new ArgumentNullException ("encryptedData");
var enveloped = new EnvelopedCms ();
enveloped.Decode (ReadAllBytes (encryptedData));
enveloped.Decrypt ();
var decryptedData = enveloped.Encode ();
var memory = new MemoryStream (decryptedData, false);
return MimeEntity.Load (memory, true);
}
private KeyTransRecipientInfo GetKeyTransRecipientInfo (byte[] encoded)
{
EnvelopedCms ep = new EnvelopedCms ();
ep.Decode (encoded);
return (KeyTransRecipientInfo) ep.RecipientInfos [0];
}
public static byte[] Decrypt(byte[] kryptertData)
{
var envelopedCms = new EnvelopedCms();
envelopedCms.Decode(kryptertData);
envelopedCms.Decrypt(envelopedCms.RecipientInfos[0]);
return envelopedCms.ContentInfo.Content;
}
/* [Test]
[ExpectedException (typeof (ArgumentNullException))]
public void DecryptX509CertificateExCollectionNull ()
{
EnvelopedPkcs7 ep = new EnvelopedPkcs7 ();
RecipientInfo ri =
ep.Decrypt (ri, null);
}*/
private void RoundTrip (byte[] encoded)
{
X509Certificate2Collection xc = new X509Certificate2Collection ();
xc.Add (GetCertificate (true));
EnvelopedCms ep = new EnvelopedCms ();
ep.Decode (encoded);
ep.Decrypt (xc);
Assert.AreEqual ("05-00", BitConverter.ToString (ep.ContentInfo.Content), "ContentInfo.Content");
}
/// <summary>
/// Decrypt the encrypted data.
/// </summary>
/// <returns>The decrypted <see cref="MimeKit.MimeEntity"/>.</returns>
/// <param name="encryptedData">The encrypted data.</param>
/// <exception cref="System.ArgumentNullException">
/// <paramref name="encryptedData"/> is <c>null</c>.
/// </exception>
/// <exception cref="System.Security.Cryptography.CryptographicException">
/// An error occurred in the cryptographic message syntax subsystem.
/// </exception>
public override MimeEntity Decrypt(Stream encryptedData)
{
if (encryptedData == null)
throw new ArgumentNullException ("encryptedData");
var enveloped = new EnvelopedCms ();
enveloped.Decode (ReadAllBytes (encryptedData));
var store = new X509Store (StoreName.My, StoreLocation);
store.Open (OpenFlags.ReadOnly);
enveloped.Decrypt ();
store.Close ();
var decryptedData = enveloped.Encode ();
using (var memory = new MemoryStream (decryptedData, false)) {
return MimeEntity.Load (memory);
}
}
/// <summary>
/// Gets the CMS Message object
/// </summary>
protected override void EndProcessing()
{
string actualContent = null;
// Read in the content
if (String.Equals("ByContent", this.ParameterSetName, StringComparison.OrdinalIgnoreCase))
{
actualContent = _contentBuffer.ToString();
}
else
{
actualContent = System.IO.File.ReadAllText(_resolvedPath);
}
// Extract out the bytes and Base64 decode them
int startIndex, endIndex;
byte[] contentBytes = CmsUtils.RemoveAsciiArmor(actualContent, CmsUtils.BEGIN_CMS_SIGIL, CmsUtils.END_CMS_SIGIL, out startIndex, out endIndex);
if (contentBytes == null)
{
ErrorRecord error = new ErrorRecord(
new ArgumentException(CmsCommands.InputContainedNoEncryptedContent),
"InputContainedNoEncryptedContent", ErrorCategory.ObjectNotFound, null);
ThrowTerminatingError(error);
}
EnvelopedCms cms = new EnvelopedCms();
cms.Decode(contentBytes);
PSObject result = new PSObject(cms);
List<Object> recipients = new List<Object>();
foreach (RecipientInfo recipient in cms.RecipientInfos)
{
recipients.Add(recipient.RecipientIdentifier.Value);
}
result.Properties.Add(
new PSNoteProperty("Recipients", recipients));
result.Properties.Add(
new PSNoteProperty("Content", actualContent));
WriteObject(result);
}
public static void EnvelopedCmsDecryptWithoutMatchingCertSki()
{
// You don't have the private key? No message for you.
// This is the private key that "we don't have." We want to force it to load anyway, though, to trigger
// the "fail the test due to bad machine config" exception if someone left this cert in the MY store check.
using (X509Certificate2 ignore = Certificates.RSAKeyTransfer1.TryGetCertificateWithPrivateKey())
{ }
byte[] encodedMessage =
("3081f206092a864886f70d010703a081e43081e10201023181ae3081ab0201028014f2008aa9fa3742e8370cb1674ce1d158"
+ "2921dcc3300d06092a864886f70d01010105000481804336e978bc72ba2f5264cd854867fac438f36f2b3df6004528f2df83"
+ "4fb2113d6f7c07667e7296b029756222d6ced396a8fffed32be838eec7f2e54b9467fa80f85d097f7d1f0fbde57e07ab3d46"
+ "a60b31f37ef9844dcab2a8eef4fec5579fac5ec1e7ee82409898e17d30c3ac1a407fca15d23c9df2904a707294d78d4300ba"
+ "302b06092a864886f70d010701301406082a864886f70d03070408355c596e3e8540608008f1f811e862e51bbd").HexToByteArray();
EnvelopedCms ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
RecipientInfo recipientInfo = ecms.RecipientInfos[0];
X509Certificate2Collection extraStore = new X509Certificate2Collection();
Assert.ThrowsAny<CryptographicException>(() => ecms.Decrypt(recipientInfo));
Assert.ThrowsAny<CryptographicException>(() => ecms.Decrypt(extraStore));
Assert.ThrowsAny<CryptographicException>(() => ecms.Decrypt(recipientInfo, extraStore));
}
public static void EnvelopedCmsDecryptNullExtraStore()
{
byte[] encodedMessage =
("3082010c06092a864886f70d010703a081fe3081fb0201003181c83081c5020100302e301a311830160603550403130f5253"
+ "414b65795472616e7366657231021031d935fb63e8cfab48a0bf7b397b67c0300d06092a864886f70d01010105000481805e"
+ "bb2d08773594be9ec5d30c0707cf339f2b982a4f0797b74d520a0c973d668a9a6ad9d28066ef36e5b5620fef67f4d79ee50c"
+ "25eb999f0c656548347d5676ac4b779f8fce2b87e6388fbe483bb0fcf78ab1f1ff29169600401fded7b2803a0bf96cc160c4"
+ "96726216e986869eed578bda652855c85604a056201538ee56b6c4302b06092a864886f70d010701301406082a864886f70d"
+ "030704083adadf63cd297a86800835edc437e31d0b70").HexToByteArray();
EnvelopedCms ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
RecipientInfo recipientInfo = ecms.RecipientInfos[0];
X509Certificate2Collection extraStore = null;
Assert.Throws<ArgumentNullException>(() => ecms.Decrypt(extraStore));
Assert.Throws<ArgumentNullException>(() => ecms.Decrypt(recipientInfo, extraStore));
}
public static void ReuseEnvelopeCmsDecodeThenEncode()
{
byte[] encodedMessage =
("3082010c06092a864886f70d010703a081fe3081fb0201003181c83081c5020100302e301a311830160603550403130f5253"
+ "414b65795472616e7366657231021031d935fb63e8cfab48a0bf7b397b67c0300d06092a864886f70d01010105000481805e"
+ "bb2d08773594be9ec5d30c0707cf339f2b982a4f0797b74d520a0c973d668a9a6ad9d28066ef36e5b5620fef67f4d79ee50c"
+ "25eb999f0c656548347d5676ac4b779f8fce2b87e6388fbe483bb0fcf78ab1f1ff29169600401fded7b2803a0bf96cc160c4"
+ "96726216e986869eed578bda652855c85604a056201538ee56b6c4302b06092a864886f70d010701301406082a864886f70d"
+ "030704083adadf63cd297a86800835edc437e31d0b70").HexToByteArray();
EnvelopedCms ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
using (X509Certificate2 cert = Certificates.RSAKeyTransfer1.GetCertificate())
{
CmsRecipient cmsRecipient = new CmsRecipient(cert);
ecms.Encrypt(cmsRecipient);
}
encodedMessage = ecms.Encode();
ecms.Decode(encodedMessage);
RecipientInfoCollection recipients = ecms.RecipientInfos;
Assert.Equal(1, recipients.Count);
RecipientInfo recipientInfo = recipients[0];
KeyTransRecipientInfo recipient = recipientInfo as KeyTransRecipientInfo;
Assert.NotNull(recipientInfo);
SubjectIdentifier subjectIdentifier = recipient.RecipientIdentifier;
object value = subjectIdentifier.Value;
Assert.True(value is X509IssuerSerial);
X509IssuerSerial xis = (X509IssuerSerial)value;
Assert.Equal("CN=RSAKeyTransfer1", xis.IssuerName);
Assert.Equal("31D935FB63E8CFAB48A0BF7B397B67C0", xis.SerialNumber);
}
public static void EnvelopedCmsNullDecode()
{
EnvelopedCms ecms = new EnvelopedCms();
Assert.Throws<ArgumentNullException>(() => ecms.Decode(null));
}
private static KeyTransRecipientInfo EncodeKeyTransl(SubjectIdentifierType type = SubjectIdentifierType.IssuerAndSerialNumber)
{
ContentInfo contentInfo = new ContentInfo(new byte[] { 1, 2, 3 });
EnvelopedCms ecms = new EnvelopedCms(contentInfo);
using (X509Certificate2 cert = Certificates.RSAKeyTransfer1.GetCertificate())
{
CmsRecipient cmsRecipient = new CmsRecipient(type, cert);
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.True(recipientInfo is KeyTransRecipientInfo);
return (KeyTransRecipientInfo)recipientInfo;
}
public static void EnvelopedCmsDecryptWithoutMatchingCert()
{
// You don't have the private key? No message for you.
// This is the private key that "we don't have." We want to force it to load anyway, though, to trigger
// the "fail the test due to bad machine config" exception if someone left this cert in the MY store check.
using (X509Certificate2 ignore = Certificates.RSAKeyTransfer1.TryGetCertificateWithPrivateKey())
{ }
byte[] encodedMessage =
("3082010c06092a864886f70d010703a081fe3081fb0201003181c83081c5020100302e301a311830160603550403130f5253"
+ "414b65795472616e7366657231021031d935fb63e8cfab48a0bf7b397b67c0300d06092a864886f70d01010105000481805e"
+ "bb2d08773594be9ec5d30c0707cf339f2b982a4f0797b74d520a0c973d668a9a6ad9d28066ef36e5b5620fef67f4d79ee50c"
+ "25eb999f0c656548347d5676ac4b779f8fce2b87e6388fbe483bb0fcf78ab1f1ff29169600401fded7b2803a0bf96cc160c4"
+ "96726216e986869eed578bda652855c85604a056201538ee56b6c4302b06092a864886f70d010701301406082a864886f70d"
+ "030704083adadf63cd297a86800835edc437e31d0b70").HexToByteArray();
EnvelopedCms ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
RecipientInfo recipientInfo = ecms.RecipientInfos[0];
X509Certificate2Collection extraStore = new X509Certificate2Collection();
Assert.ThrowsAny<CryptographicException>(() => ecms.Decrypt(recipientInfo));
Assert.ThrowsAny<CryptographicException>(() => ecms.Decrypt(extraStore));
Assert.ThrowsAny<CryptographicException>(() => ecms.Decrypt(recipientInfo, extraStore));
}
private static KeyTransRecipientInfo FixedValueKeyTrans1(SubjectIdentifierType type = SubjectIdentifierType.IssuerAndSerialNumber)
{
byte[] encodedMessage;
switch (type)
{
case SubjectIdentifierType.IssuerAndSerialNumber:
encodedMessage = s_KeyTransEncodedMessage;
break;
case SubjectIdentifierType.SubjectKeyIdentifier:
encodedMessage = s_KeyTransEncodedMessage_Ski;
break;
default:
throw new Exception("Bad SubjectIdentifierType.");
}
EnvelopedCms ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
RecipientInfoCollection recipients = ecms.RecipientInfos;
Assert.Equal(1, recipients.Count);
RecipientInfo recipientInfo = recipients[0];
Assert.True(recipientInfo is KeyTransRecipientInfo);
return (KeyTransRecipientInfo)recipientInfo;
}
/// <summary>
/// Extracts the original message from the S/MIME envelope and decrypts it.
/// </summary>
/// <param name="extraStore">Certificates with private keys to be used in addition to those found in the current user's personal store.</param>
/// <returns>A Message object representing the message as it was before encryption.</returns>
/// <example>
/// <code>
/// [C#]
///
/// // Load a certificate (with private key) and add it to the collection.
/// X509Certificate2 cert = new X509Certificate2("C:\\mycertificate.pfx");
///
/// // We retrieved a Message object by some means and have a reference to it in variable message.
/// Message originalMessage = message.SmimeDevelopeAndDecrypt(new X509Certificate2Collection(cert));
///
/// //originalMessage contains all information about the encrypted message.
///
/// </code>
/// </example>
#if !PocketPC
public Message SmimeDevelopeAndDecrypt(X509Certificate2Collection extraStore)
{
if (!this.IsSmimeEncrypted) throw new InvalidOperationException("This message doesn't seem to be encrypted, or the encryption method is unknown.");
else
{
EnvelopedCms cms = new EnvelopedCms();
cms.Decode(this.PartTreeRoot.BinaryContent);
cms.Decrypt(extraStore);
Message sub = Parser.ParseMessage(cms.ContentInfo.Content);
return sub;
}
}
private static void ValidateZeroLengthContent(byte[] encodedMessage)
{
EnvelopedCms ecms = new EnvelopedCms();
ecms.Decode(encodedMessage);
using (X509Certificate2 cert = Certificates.RSAKeyTransfer1.TryGetCertificateWithPrivateKey())
{
if (cert == null)
return;
X509Certificate2Collection extraStore = new X509Certificate2Collection(cert);
ecms.Decrypt(extraStore);
ContentInfo contentInfo = ecms.ContentInfo;
byte[] content = contentInfo.Content;
if (content.Length == 6)
throw new Exception("ContentInfo expected to be 0 but was actually 6. If you're running on the desktop CLR, this is actually a known bug.");
Assert.Equal(0, content.Length);
}
}
private string Decrypt(string actualContent)
{
// Extract out the bytes and Base64 decode them
int startIndex, endIndex;
byte[] messageBytes = CmsUtils.RemoveAsciiArmor(actualContent, CmsUtils.BEGIN_CMS_SIGIL, CmsUtils.END_CMS_SIGIL, out startIndex, out endIndex);
if ((messageBytes == null) && (!IncludeContext))
{
ErrorRecord error = new ErrorRecord(
new ArgumentException(
String.Format(CultureInfo.InvariantCulture,
CmsCommands.InputContainedNoEncryptedContentIncludeContext, "-IncludeContext")),
"InputContainedNoEncryptedContentIncludeContext", ErrorCategory.ObjectNotFound, null);
ThrowTerminatingError(error);
}
// Capture the pre and post context, if there was any
string preContext = null;
string postContext = null;
if (IncludeContext)
{
if (startIndex > -1)
{
preContext = actualContent.Substring(0, startIndex);
}
if (endIndex > -1)
{
postContext = actualContent.Substring(endIndex);
}
}
EnvelopedCms cms = new EnvelopedCms();
X509Certificate2Collection certificates = new X509Certificate2Collection();
if ((To != null) && (To.Length > 0))
{
ErrorRecord error = null;
foreach (CmsMessageRecipient recipient in To)
{
recipient.Resolve(this.SessionState, ResolutionPurpose.Decryption, out error);
if (error != null)
{
ThrowTerminatingError(error);
return null;
}
foreach (X509Certificate2 certificate in recipient.Certificates)
{
certificates.Add(certificate);
}
}
}
string resultString = actualContent;
if (messageBytes != null)
{
cms.Decode(messageBytes);
cms.Decrypt(certificates);
resultString = System.Text.Encoding.UTF8.GetString(cms.ContentInfo.Content);
}
if (IncludeContext)
{
if (preContext != null)
{
resultString = preContext + resultString;
}
if (postContext != null)
{
resultString = resultString + postContext;
}
}
return resultString;
}
public byte[] decrypt(byte[] data)
{
var envelopedCms = new EnvelopedCms();
envelopedCms.Decode(data);
envelopedCms.Decrypt(envelopedCms.RecipientInfos[0]);
return envelopedCms.ContentInfo.Content;
}
