protected string CheckSig()
{
var formData = Request.Form;
var text = formData["txtSign"];
var sig = formData["txtSig"];
string output = "INVALID!";
if (!string.IsNullOrEmpty(sig))
{
try
{
ContentInfo contentInfo = new ContentInfo(Encoding.UTF8.GetBytes(text));
SignedCms signedCms = new SignedCms(contentInfo, true);
signedCms.Decode(Convert.FromBase64String(sig));
// This checks if the signature is valid, but doensn't actually verify the cert (TODO)
signedCms.CheckSignature(true);
output = "Signature valid.";
signedCms.CheckSignature(false);
output += "<br>Cert valid";
}
catch (Exception e)
{
output += "<br>" + e.ToString();
}
}
return output;
}
public EnvelopedCms (ContentInfo contentInfo) : this ()
{
if (contentInfo == null)
throw new ArgumentNullException ("contentInfo");
_content = contentInfo;
}
public sealed override byte[] Encrypt(CmsRecipientCollection recipients, ContentInfo contentInfo, AlgorithmIdentifier contentEncryptionAlgorithm, X509Certificate2Collection originatorCerts, CryptographicAttributeObjectCollection unprotectedAttributes)
{
using (SafeCryptMsgHandle hCryptMsg = EncodeHelpers.CreateCryptMsgHandleToEncode(recipients, contentInfo.ContentType, contentEncryptionAlgorithm, originatorCerts, unprotectedAttributes))
{
byte[] encodedContent;
if (contentInfo.ContentType.Value.Equals(Oids.Pkcs7Data, StringComparison.OrdinalIgnoreCase))
{
unsafe
{
byte[] content = contentInfo.Content;
fixed (byte* pContent = content)
{
DATA_BLOB blob = new DATA_BLOB((IntPtr)pContent, (uint)(content.Length));
encodedContent = Interop.Crypt32.CryptEncodeObjectToByteArray(CryptDecodeObjectStructType.X509_OCTET_STRING, &blob);
}
}
}
else
{
encodedContent = contentInfo.Content;
}
if (encodedContent.Length > 0)
{
if (!Interop.Crypt32.CryptMsgUpdate(hCryptMsg, encodedContent, encodedContent.Length, fFinal: true))
throw Marshal.GetLastWin32Error().ToCryptographicException();
}
byte[] encodedMessage = hCryptMsg.GetMsgParamAsByteArray(CryptMsgParamType.CMSG_CONTENT_PARAM);
return encodedMessage;
}
}
/// <summary>
/// Firma el mensaje PKCS #7 con el certificado del firmante
/// </summary>
/// <param name="pMensaje">Mensaje (como cadena de bytes)</param>
/// <param name="pCertificadoFirmante">Certificado usado para firmar</param>
/// <returns>Mensaje Firmado (como cadena de bytes)</returns>
/// <remarks></remarks>
public static byte[] FirmarMensaje(byte[] pMensaje, X509Certificate2 pCertificadoFirmante)
{
byte[] msjFirmado;
try
{
// Se pone el Mensaje recibido en un objeto ContentInfo
ContentInfo infoContenidoMsj = new ContentInfo(pMensaje);
// Se instancia el CMS Firmado con el ContentInfo
SignedCms cmsFirmado = new SignedCms(infoContenidoMsj);
// Se instancia el objeto CmsSigner con las caracteristicas del firmante
CmsSigner cmsFirmante = new CmsSigner(pCertificadoFirmante);
cmsFirmante.IncludeOption = X509IncludeOption.EndCertOnly;
// Se firma el mensaje PKCS #7 con el certificado
cmsFirmado.ComputeSignature(cmsFirmante);
msjFirmado = cmsFirmado.Encode();
// Retorno el mensaje PKCS #7 firmado .
return msjFirmado;
}
catch (Exception excepcionAlFirmar)
{
throw new Exception("ERROR: Procedimiento: FirmarMensaje. Al intentar firmar el mensaje con el certificado del firmante: " + excepcionAlFirmar.Message);
}
}
public void ConstructorNonPkcs7Oid ()
{
Oid o = new Oid ("1.2.3.4");
ContentInfo ci = new ContentInfo (o, asnNull);
Assert.AreEqual (asnNull, ci.Content, "Content");
Assert.AreEqual ("1.2.3.4", ci.ContentType.Value, "ContentType.Value");
}
/// <summary>
/// Firma mensaje
/// </summary>
/// <param name="argBytesMsg">Bytes del mensaje</param>
/// <param name="argCertFirmante">Certificado usado para firmar</param>
/// <returns>Bytes del mensaje firmado</returns>
/// <remarks></remarks>
public static byte[] FirmaBytesMensaje(byte[] argBytesMsg, X509Certificate2 argCertFirmante)
{
try
{
// Pongo el mensaje en un objeto ContentInfo (requerido para construir el obj SignedCms)
ContentInfo infoContenido = new ContentInfo(argBytesMsg);
SignedCms cmsFirmado = new SignedCms(infoContenido);
// Creo objeto CmsSigner que tiene las caracteristicas del firmante
CmsSigner cmsFirmante = new CmsSigner(argCertFirmante);
cmsFirmante.IncludeOption = X509IncludeOption.EndCertOnly;
if (VerboseMode)
{
Console.WriteLine("***Firmando bytes del mensaje...");
}
// Firmo el mensaje PKCS #7
cmsFirmado.ComputeSignature(cmsFirmante);
if (VerboseMode)
{
Console.WriteLine("***OK mensaje firmado");
}
// Encodeo el mensaje PKCS #7.
return cmsFirmado.Encode();
}
catch (Exception excepcionAlFirmar)
{
throw new Exception("***Error al firmar: " + excepcionAlFirmar.Message);
}
}
public void ConstructorContent ()
{
ContentInfo ci = new ContentInfo (asnNull);
Assert.AreEqual (asnNull, ci.Content, "Content");
Assert.AreEqual (defaultName, ci.ContentType.FriendlyName, "ContentType.FriendlyName");
Assert.AreEqual (defaultOid, ci.ContentType.Value, "ContentType.Value");
}
public EnvelopedCms (SubjectIdentifierType recipientIdentifierType, ContentInfo contentInfo)
: this (contentInfo)
{
_idType = recipientIdentifierType;
if (_idType == SubjectIdentifierType.SubjectKeyIdentifier)
_version = 2;
}
public EnvelopedCms (ContentInfo contentInfo, AlgorithmIdentifier encryptionAlgorithm)
: this (contentInfo)
{
if (encryptionAlgorithm == null)
throw new ArgumentNullException ("encryptionAlgorithm");
_identifier = encryptionAlgorithm;
}
private byte[] Sign(byte[] messageBytes)
{
Pkcs.ContentInfo content = new Pkcs.ContentInfo(messageBytes);
Pkcs.SignedCms signed = new Pkcs.SignedCms(content);
Pkcs.CmsSigner signer = new Pkcs.CmsSigner(_signerCert);
signed.ComputeSignature(signer);
byte[] signedBytes = signed.Encode();
return(signedBytes);
}
public byte[] encrypt(byte[] plainTest)
{
envelopedContentInfo = new ContentInfo(plainTest);
envelopedCms = new EnvelopedCms(envelopedContentInfo);
envelopeCmsResipient = new CmsRecipient(SubjectIdentifierType.IssuerAndSerialNumber, cryptographyClientCert);
envelopedCms.Encrypt(envelopeCmsResipient);
return envelopedCms.Encode();
}
public byte[] Sign(byte[] data)
{
ContentInfo contentInfo = new ContentInfo(_md5.ComputeHash(data));
SignedCms signedCms = new SignedCms(contentInfo);
CmsSigner cmsSigner = new CmsSigner(_cert);
cmsSigner.IncludeOption = X509IncludeOption.WholeChain;
signedCms.ComputeSignature(cmsSigner);
return signedCms.Encode();
}
public SignedCms (ContentInfo content, bool detached)
: this ()
{
if (content == null)
throw new ArgumentNullException ("content");
_content = content;
_detached = detached;
}
private byte[] EncryptedBytes(byte[] bytes)
{
var contentInfo = new ContentInfo(bytes);
var encryptAlgoOid = new Oid("2.16.840.1.101.3.4.1.42"); // AES-256-CBC
var envelopedCms = new EnvelopedCms(contentInfo, new AlgorithmIdentifier(encryptAlgoOid));
var recipient = new CmsRecipient(CryptographicCertificate);
envelopedCms.Encrypt(recipient);
return envelopedCms.Encode();
}
/// <summary>
/// Encrypts the specified string.
/// </summary>
/// <param name="plaintext">The plaintext to be encrypted.</param>
/// <param name="certificate">The certificate to be used for encryption.</param>
/// <returns>The encrypted text.</returns>
public static string Encrypt(this string plaintext, X509Certificate2 certificate)
{
var contentInfo = new ContentInfo(Encoding.UTF8.GetBytes(plaintext));
var envelopedCms = new EnvelopedCms(contentInfo);
var cmsRecipient = new CmsRecipient(certificate);
envelopedCms.Encrypt(cmsRecipient);
return Convert.ToBase64String(envelopedCms.Encode());
}
private byte[] Envelope(byte[] contentBytes)
{
Pkcs.ContentInfo content = new Pkcs.ContentInfo(contentBytes);
Pkcs.EnvelopedCms envMsg = new Pkcs.EnvelopedCms(content);
Pkcs.CmsRecipient recipient = new Pkcs.CmsRecipient(Pkcs.SubjectIdentifierType.IssuerAndSerialNumber, _recipientCert);
envMsg.Encrypt(recipient);
byte[] encryptedBytes = envMsg.Encode();
return(encryptedBytes);
}
public static byte[] Encode(byte[] arMessage, object signerCert, string signerPassword)
{
X509Certificate2 cert = signerCert is X509Certificate2 ? (X509Certificate2)signerCert : new X509Certificate2((string)signerCert, signerPassword);
ContentInfo contentInfo = new ContentInfo(arMessage);
SignedCms signedCms = new SignedCms(contentInfo, true); // <- true detaches the signature
CmsSigner cmsSigner = new CmsSigner(cert);
signedCms.ComputeSignature(cmsSigner);
byte[] signature = signedCms.Encode();
return(signature);
}
public static void DecodeAlgorithmDes_RoundTrip()
{
AlgorithmIdentifier algorithm = new AlgorithmIdentifier(new Oid(Oids.Des));
ContentInfo contentInfo = new ContentInfo(new byte[] { 1, 2, 3 });
EnvelopedCms ecms = new EnvelopedCms(contentInfo, algorithm);
using (X509Certificate2 cert = Certificates.RSAKeyTransfer1.GetCertificate())
{
CmsRecipient cmsRecipient = new CmsRecipient(cert);
ecms.Encrypt(cmsRecipient);
}
byte[] encodedMessage = ecms.Encode();
VerifyAlgorithmDes(encodedMessage);
}
public static void CheckSig(byte[] sig, byte[] data)
{
ContentInfo contentInfo = new ContentInfo(data);
SignedCms signedCms = new SignedCms(contentInfo, true);
signedCms.Decode(sig);
// This checks if the signature is valid, but doensn't actually verify the cert (TODO)
signedCms.CheckSignature(true);
signedCms.CheckSignature(false);
}
public static void DecodeCertificates0_RoundTrip()
{
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();
VerifyCertificates0(encodedMessage);
}
public static void DecodeRecipients3_RoundTrip()
{
ContentInfo contentInfo = new ContentInfo(new byte[] { 1, 2, 3 });
EnvelopedCms ecms = new EnvelopedCms(contentInfo);
CmsRecipientCollection recipients = new CmsRecipientCollection();
foreach (X509Certificate2 cert in s_certs)
{
recipients.Add(new CmsRecipient(cert));
}
ecms.Encrypt(recipients);
byte[] encodedMessage = ecms.Encode();
VerifyRecipients3(encodedMessage);
}
public EnvelopedCms(ContentInfo contentInfo, AlgorithmIdentifier encryptionAlgorithm)
{
if (contentInfo == null)
throw new ArgumentNullException(nameof(contentInfo));
if (encryptionAlgorithm == null)
throw new ArgumentNullException(nameof(encryptionAlgorithm));
Version = 0; // It makes little sense to ask for a version before you've decoded, but since the desktop returns 0 in that case, we will too.
ContentInfo = contentInfo;
ContentEncryptionAlgorithm = encryptionAlgorithm;
Certificates = new X509Certificate2Collection();
UnprotectedAttributes = new CryptographicAttributeObjectCollection();
_decryptorPal = null;
_lastCall = LastCall.Ctor;
}
public static String CheckFileSignature(ContentInfo content, byte[] signature)
{
var verifyCms = new SignedCms(content, true);
verifyCms.Decode(signature);
var cert = verifyCms.SignerInfos[0].Certificate;
try
{
verifyCms.CheckSignature(new X509Certificate2Collection(cert), false);
return @"Signature is valid";
}
catch (CryptographicException)
{
return @"Signature is not valid for content";
}
}
private byte[] FirmaBytesMensaje( byte[] argBytesMsg, X509Certificate2 argCertFirmante )
{
ContentInfo infoContenido = new ContentInfo( argBytesMsg );
SignedCms cmsFirmado = new SignedCms( infoContenido );
CmsSigner cmsFirmante = new CmsSigner( argCertFirmante );
try
{
cmsFirmante.IncludeOption = X509IncludeOption.EndCertOnly;
cmsFirmado.ComputeSignature( cmsFirmante );
}
catch ( Exception error )
{
this.manejadorErrores.ManejarError( error, "FirmaBytesMensaje", error.Message );
}
return cmsFirmado.Encode();
}
private MailMessage GenerateHtmlMessage(string from, string to, string subject, string content, string[] attachmentFilepaths)
{
MailMessage mail = new MailMessage();
mail.From = new MailAddress(from);
mail.To.Add(to);
mail.Subject = subject;
string body = null;
if (attachmentFilepaths != null && attachmentFilepaths.Length > 0)
{
StringBuilder sb = new StringBuilder();
sb.Append("MIME-Version: 1.0\r\n");
sb.Append("Content-Type: multipart/mixed; boundary=unique-boundary-1\r\n");
sb.Append("\r\n");
sb.Append("This is a multi-part message in MIME format.\r\n");
sb.Append("--unique-boundary-1\r\n");
sb.Append("Content-Type: text/html\r\n"); //could use text/plain as well here if you want a plaintext message
sb.Append("Content-Transfer-Encoding: 7Bit\r\n\r\n");
sb.Append(content);
if (!content.EndsWith("\r\n"))
sb.Append("\r\n");
sb.Append("\r\n\r\n");
foreach (string filepath in attachmentFilepaths)
{
sb.Append(GenerateRawAttachement(filepath));
}
body = sb.ToString();
}
else
{
body = "Content-Type: text/html\r\nContent-Transfer-Encoding: 7Bit\r\n\r\n" + content;
}
//input your certification and private key.
X509Certificate2 cert = new X509Certificate2("emailcertification.pfx", "6522626", X509KeyStorageFlags.Exportable | X509KeyStorageFlags.PersistKeySet);
ContentInfo contentInfo = new ContentInfo(Encoding.UTF8.GetBytes(body));
SignedCms signedCms = new SignedCms(contentInfo, false);
CmsSigner Signer = new CmsSigner(SubjectIdentifierType.IssuerAndSerialNumber, cert);
signedCms.ComputeSignature(Signer);
byte[] signedBytes = signedCms.Encode();
MemoryStream stream = new MemoryStream(signedBytes);
AlternateView view = new AlternateView(stream, "application/pkcs7-mime; smime-type=signed-data;name=smime.p7m");
mail.AlternateViews.Add(view);
return mail;
}
public static void ZeroLengthContent_RoundTrip()
{
ContentInfo contentInfo = new ContentInfo(Array.Empty<byte>());
EnvelopedCms ecms = new EnvelopedCms(contentInfo);
using (X509Certificate2 cert = Certificates.RSAKeyTransfer1.GetCertificate())
{
CmsRecipient cmsRecipient = new CmsRecipient(cert);
try
{
ecms.Encrypt(cmsRecipient);
}
catch (CryptographicException e)
{
throw new Exception("ecms.Encrypt() threw " + e.Message + ".\nIf you're running on the desktop CLR, this is actually an expected result.");
}
}
byte[] encodedMessage = ecms.Encode();
ValidateZeroLengthContent(encodedMessage);
}
public SignedCms (SubjectIdentifierType signerIdentifierType, ContentInfo contentInfo, bool detached) {
if (contentInfo == null)
throw new ArgumentNullException("contentInfo");
if (contentInfo.Content == null)
throw new ArgumentNullException("contentInfo.Content");
// Reset all states.
if (signerIdentifierType != SubjectIdentifierType.SubjectKeyIdentifier &&
signerIdentifierType != SubjectIdentifierType.IssuerAndSerialNumber &&
signerIdentifierType != SubjectIdentifierType.NoSignature) {
signerIdentifierType = SubjectIdentifierType.IssuerAndSerialNumber;
}
m_safeCryptMsgHandle = SafeCryptMsgHandle.InvalidHandle;
m_signerIdentifierType = signerIdentifierType;
m_version = 0;
m_contentInfo = contentInfo;
m_detached = detached;
}
public static byte[] FirmaFileBouncy(byte[] data, X509Certificate2 cert)
{
try
{
SHA256Managed hashSha256 = new SHA256Managed();
byte[] certHash = hashSha256.ComputeHash(cert.RawData);
EssCertIDv2 essCert1 = new EssCertIDv2(new Org.BouncyCastle.Asn1.X509.AlgorithmIdentifier("2.16.840.1.101.3.4.2.1"), certHash);
SigningCertificateV2 scv2 = new SigningCertificateV2(new EssCertIDv2[] { essCert1 });
Org.BouncyCastle.Asn1.Cms.Attribute CertHAttribute = new Org.BouncyCastle.Asn1.Cms.Attribute(Org.BouncyCastle.Asn1.Pkcs.PkcsObjectIdentifiers.IdAASigningCertificateV2, new DerSet(scv2));
Asn1EncodableVector v = new Asn1EncodableVector();
v.Add(CertHAttribute);
Org.BouncyCastle.Asn1.Cms.AttributeTable AT = new Org.BouncyCastle.Asn1.Cms.AttributeTable(v);
CmsSignedDataGenWithRsaCsp cms = new CmsSignedDataGenWithRsaCsp();
var rsa = (RSACryptoServiceProvider)cert.PrivateKey;
Org.BouncyCastle.X509.X509Certificate certCopy = DotNetUtilities.FromX509Certificate(cert);
cms.MyAddSigner(rsa, certCopy, "1.2.840.113549.1.1.1", "2.16.840.1.101.3.4.2.1", AT, null);
ArrayList certList = new ArrayList();
certList.Add(certCopy);
Org.BouncyCastle.X509.Store.X509CollectionStoreParameters PP = new Org.BouncyCastle.X509.Store.X509CollectionStoreParameters(certList);
Org.BouncyCastle.X509.Store.IX509Store st1 = Org.BouncyCastle.X509.Store.X509StoreFactory.Create("CERTIFICATE/COLLECTION", PP);
cms.AddCertificates(st1);
//mi ricavo il file da firmare
CmsSignedData Firmato = cms.Generate(new CmsProcessableByteArray(data), false);
CmsSigner cmsSigner = new CmsSigner(cert);
cmsSigner.IncludeOption = X509IncludeOption.EndCertOnly;
System.Security.Cryptography.Pkcs.ContentInfo contentInfo = new System.Security.Cryptography.Pkcs.ContentInfo(Firmato.GetEncoded());
SignedCms signedCms = new SignedCms();
signedCms.Decode(Firmato.GetEncoded());
byte[] ret = signedCms.Encode();
return(ret);
}
catch
{
return(null);
}
}
public static SignatureResponse Sign(byte[] data)
{
// TODO:
// padding configuration
// algorithm configuration
// encoding configuration
/*
SHA1Managed sha1 = new SHA1Managed();
byte[] hash = sha1.ComputeHash(data);
var sig = csp.SignHash(hash, CryptoConfig.MapNameToOID("SHA1"));
//sig = csp.SignData(Encoding.UTF8.GetBytes(text), CryptoConfig.MapNameToOID("SHA1"));
MessageBox.Show("SignData");
*/
var content = new ContentInfo(data);
var cms = new SignedCms(content, true); // TODO detached config
var signer = new CmsSigner();
signer.IncludeOption = X509IncludeOption.EndCertOnly;
cms.ComputeSignature(signer, false);
var sig = cms.Encode();
//ensure my signature is correct before continuing.
cms.CheckSignature(true);
var newCMS = new SignedCms(content, false);
newCMS.Decode(sig);
newCMS.CheckSignature(true);
var cert = cms.Certificates[0];
CheckSig(sig, data);
return new SignatureResponse
{
publicKey = Convert.ToBase64String(cert.PublicKey.EncodedKeyValue.RawData),
signature = Convert.ToBase64String(sig),
fullSig = null // TODO
};
}
public static byte[] Encrypt(byte[] message, object recipientCert, string encryptionAlgorithm)
{
if (!string.Equals(encryptionAlgorithm, EncryptionAlgorithm.DES3) && !string.Equals(encryptionAlgorithm, EncryptionAlgorithm.RC2))
{
throw new ArgumentException("encryptionAlgorithm argument must be 3DES or RC2 - value specified was:" + encryptionAlgorithm);
}
X509Certificate2 cert = recipientCert is X509Certificate2 ? (X509Certificate2)recipientCert : new X509Certificate2((string)recipientCert);
ContentInfo contentInfo = new ContentInfo(message);
EnvelopedCms envelopedCms = new EnvelopedCms(contentInfo,
new AlgorithmIdentifier(new System.Security.Cryptography.Oid(encryptionAlgorithm))); // should be 3DES or RC2
CmsRecipient recipient = new CmsRecipient(SubjectIdentifierType.IssuerAndSerialNumber, cert);
envelopedCms.Encrypt(recipient);
byte[] encoded = envelopedCms.Encode();
return(encoded);
}
public static byte[] SignFile(X509Certificate2 cert, byte[] data)
{
try
{
ContentInfo content = new ContentInfo(data);
SignedCms signedCms = new SignedCms(content, false);
if (VerifySign(data))
{
signedCms.Decode(data);
}
CmsSigner signer = new CmsSigner(cert);
signer.IncludeOption = X509IncludeOption.WholeChain;
signedCms.ComputeSignature(signer);
return signedCms.Encode();
}
catch (Exception ex)
{
throw new Exception("Erro ao assinar arquivo. A mensagem retornada foi: " + ex.Message);
}
}
internal static DecryptorPalWindows Decode(
byte[] encodedMessage,
out int version,
out ContentInfo contentInfo,
out AlgorithmIdentifier contentEncryptionAlgorithm,
out X509Certificate2Collection originatorCerts,
out CryptographicAttributeObjectCollection unprotectedAttributes
)
{
SafeCryptMsgHandle hCryptMsg = Interop.Crypt32.CryptMsgOpenToDecode(MsgEncodingType.All, 0, 0, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero);
if (hCryptMsg == null || hCryptMsg.IsInvalid)
throw Marshal.GetLastWin32Error().ToCryptographicException();
if (!Interop.Crypt32.CryptMsgUpdate(hCryptMsg, encodedMessage, encodedMessage.Length, fFinal: true))
throw Marshal.GetLastWin32Error().ToCryptographicException();
CryptMsgType cryptMsgType = hCryptMsg.GetMessageType();
if (cryptMsgType != CryptMsgType.CMSG_ENVELOPED)
throw ErrorCode.CRYPT_E_INVALID_MSG_TYPE.ToCryptographicException();
version = hCryptMsg.GetVersion();
contentInfo = hCryptMsg.GetContentInfo();
using (SafeHandle sh = hCryptMsg.GetMsgParamAsMemory(CryptMsgParamType.CMSG_ENVELOPE_ALGORITHM_PARAM))
{
unsafe
{
CRYPT_ALGORITHM_IDENTIFIER* pCryptAlgorithmIdentifier = (CRYPT_ALGORITHM_IDENTIFIER*)(sh.DangerousGetHandle());
contentEncryptionAlgorithm = (*pCryptAlgorithmIdentifier).ToAlgorithmIdentifier();
}
}
originatorCerts = hCryptMsg.GetOriginatorCerts();
unprotectedAttributes = hCryptMsg.GetUnprotectedAttributes();
RecipientInfoCollection recipientInfos = CreateRecipientInfos(hCryptMsg);
return new DecryptorPalWindows(hCryptMsg, recipientInfos);
}
/// <summary>
/// Подписание данных (файла) с помощью сертификата ЭП
/// </summary>
/// <param name="certificate">Сертификат Электронной Подписи, которым будет подписан файл</param>
/// <returns>Файл с подписью (в случае прикрепленной подписи будет файл с данными и подписью) </returns>
public byte[] Sign(ICertificate certificate)
{
//создаем контейнер с данными, которые будут подписываться
var content = new ContentInfo(this.Original);
//создаем пакет, в который помещаем контейнер с данными и параметры подписи
//это основной объект, в рамках которого формируются проверки и преобразования подписи
var cms = new SignedCms(content, this.Detached);
//создаем подписанта (объект на основе сертификата, который будет подписывать)
var signer = new CmsSigner(certificate.CertificateX509);
//с помощью подписанта подписываем пакет так,
//что теперь в пакете находятся не сами данные,
//а именно подписанные данные, то есть:
// - сама подпись в случае отсоединенной подписи
// - подпись с оригинальными данными в случае присоединенной подписи
cms.ComputeSignature(signer, false);
// сохраняем подписанный пакет
byte[] result = cms.Encode();
return result;
}
public SignedCms(ContentInfo content)
: this(content, false)
{
}
public SignedCms(SubjectIdentifierType signerIdentifierType, ContentInfo content)
: this(content, false)
{
_type = signerIdentifierType;
}
public SignedCms(SubjectIdentifierType signerIdentifierType, ContentInfo content, bool detached)
: this(content, detached)
{
_type = signerIdentifierType;
}
public SignedCms(ContentInfo contentInfo, bool detached)
: this(SubjectIdentifierType.IssuerAndSerialNumber, contentInfo, detached)
{
}
public static byte[] SignDetached(byte[] data, X509Certificate2 signingCert)
{
ContentInfo content = new ContentInfo(data);
SignedCms signedMessage = new SignedCms(content, true);
CmsSigner signer = new CmsSigner(signingCert);
signedMessage.ComputeSignature(signer);
byte[] signedBytes = signedMessage.Encode();
return signedBytes;
}
public void Decode(byte[] encodedMessage)
{
PKCS7.ContentInfo ci = new PKCS7.ContentInfo(encodedMessage);
if (ci.ContentType != PKCS7.Oid.signedData)
{
throw new Exception("");
}
PKCS7.SignedData sd = new PKCS7.SignedData(ci.Content);
SubjectIdentifierType type = SubjectIdentifierType.Unknown;
object o = null;
X509Certificate2 x509 = null;
if (sd.SignerInfo.Certificate != null)
{
x509 = new X509Certificate2(sd.SignerInfo.Certificate.RawData);
}
else if ((sd.SignerInfo.IssuerName != null) && (sd.SignerInfo.SerialNumber != null))
{
byte[] serial = sd.SignerInfo.SerialNumber;
Array.Reverse(serial); // ???
type = SubjectIdentifierType.IssuerAndSerialNumber;
X509IssuerSerial xis = new X509IssuerSerial();
xis.IssuerName = sd.SignerInfo.IssuerName;
xis.SerialNumber = ToString(serial, true);
o = xis;
// TODO: move to a FindCertificate (issuer, serial, collection)
foreach (Mono.Security.X509.X509Certificate x in sd.Certificates)
{
if (x.IssuerName == sd.SignerInfo.IssuerName)
{
if (ToString(x.SerialNumber, true) == xis.SerialNumber)
{
x509 = new X509Certificate2(x.RawData);
break;
}
}
}
}
else if (sd.SignerInfo.SubjectKeyIdentifier != null)
{
string ski = ToString(sd.SignerInfo.SubjectKeyIdentifier, false);
type = SubjectIdentifierType.SubjectKeyIdentifier;
o = (object)ski;
// TODO: move to a FindCertificate (ski, collection)
foreach (Mono.Security.X509.X509Certificate x in sd.Certificates)
{
if (ToString(GetKeyIdentifier(x), false) == ski)
{
x509 = new X509Certificate2(x.RawData);
break;
}
}
}
SignerInfo si = new SignerInfo(sd.SignerInfo.HashName, x509, type, o, sd.SignerInfo.Version);
// si.AuthenticatedAttributes
// si.UnauthenticatedAttributes
_info.Add(si);
ASN1 content = sd.ContentInfo.Content;
Oid oid = new Oid(sd.ContentInfo.ContentType);
if (!_detached || _content == null)
{
if (content[0] == null)
{
throw new ArgumentException("ContentInfo has no content. Detached signature ?");
}
_content = new ContentInfo(oid, content[0].Value);
}
foreach (Mono.Security.X509.X509Certificate x in sd.Certificates)
{
_certs.Add(new X509Certificate2(x.RawData));
}
_version = sd.Version;
}
public EnvelopedCms(ContentInfo contentInfo)
: this(contentInfo, new AlgorithmIdentifier(Oid.FromOidValue(Oids.TripleDesCbc, OidGroup.EncryptionAlgorithm)))
{
}
public EnvelopedCms(ContentInfo contentInfo)
: this(contentInfo, new AlgorithmIdentifier(Oids.Aes256CbcOid.CopyOid()))
{
}
public SignedCms(SubjectIdentifierType signerIdentifierType, ContentInfo contentInfo)
: this(signerIdentifierType, contentInfo, false)
{
}
public static bool VerifyDetached(byte[] data, byte[] signature)
{
ContentInfo content = new ContentInfo(data);
SignedCms signedMessage = new SignedCms(content, true);
signedMessage.Decode(signature);
try
{
signedMessage.CheckSignature(false);
return true;
}
catch
{
return false;
}
}
public SignedCms(ContentInfo contentInfo)
: this(SubjectIdentifierType.IssuerAndSerialNumber, contentInfo, false)
{
}