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using System;
using System.Collections;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.CryptoPro;
using Org.BouncyCastle.Asn1.Eac;
using Org.BouncyCastle.Asn1.Iana;
using Org.BouncyCastle.Asn1.Misc;
using Org.BouncyCastle.Asn1.Nist;
using Org.BouncyCastle.Asn1.Oiw;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Asn1.TeleTrust;
using Org.BouncyCastle.Asn1.X509;
using Org.BouncyCastle.Asn1.X9;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Security;
using Org.BouncyCastle.Security.Certificates;
using Org.BouncyCastle.Utilities;
using Org.BouncyCastle.X509;
using Org.BouncyCastle.X509.Store;
namespace Org.BouncyCastle.Cms
{
internal class CmsSignedHelper
{
internal static readonly CmsSignedHelper Instance = new CmsSignedHelper();
private static readonly IDictionary encryptionAlgs = Platform.CreateHashtable();
private static readonly IDictionary digestAlgs = Platform.CreateHashtable();
private static readonly IDictionary digestAliases = Platform.CreateHashtable();
private static void AddEntries(DerObjectIdentifier oid, string digest, string encryption)
{
string alias = oid.Id;
digestAlgs.Add(alias, digest);
encryptionAlgs.Add(alias, encryption);
}
static CmsSignedHelper()
{
AddEntries(NistObjectIdentifiers.DsaWithSha224, "SHA224", "DSA");
AddEntries(NistObjectIdentifiers.DsaWithSha256, "SHA256", "DSA");
AddEntries(NistObjectIdentifiers.DsaWithSha384, "SHA384", "DSA");
AddEntries(NistObjectIdentifiers.DsaWithSha512, "SHA512", "DSA");
AddEntries(OiwObjectIdentifiers.DsaWithSha1, "SHA1", "DSA");
AddEntries(OiwObjectIdentifiers.MD4WithRsa, "MD4", "RSA");
AddEntries(OiwObjectIdentifiers.MD4WithRsaEncryption, "MD4", "RSA");
AddEntries(OiwObjectIdentifiers.MD5WithRsa, "MD5", "RSA");
AddEntries(OiwObjectIdentifiers.Sha1WithRsa, "SHA1", "RSA");
AddEntries(PkcsObjectIdentifiers.MD2WithRsaEncryption, "MD2", "RSA");
AddEntries(PkcsObjectIdentifiers.MD4WithRsaEncryption, "MD4", "RSA");
AddEntries(PkcsObjectIdentifiers.MD5WithRsaEncryption, "MD5", "RSA");
AddEntries(PkcsObjectIdentifiers.Sha1WithRsaEncryption, "SHA1", "RSA");
AddEntries(PkcsObjectIdentifiers.Sha224WithRsaEncryption, "SHA224", "RSA");
AddEntries(PkcsObjectIdentifiers.Sha256WithRsaEncryption, "SHA256", "RSA");
AddEntries(PkcsObjectIdentifiers.Sha384WithRsaEncryption, "SHA384", "RSA");
AddEntries(PkcsObjectIdentifiers.Sha512WithRsaEncryption, "SHA512", "RSA");
AddEntries(X9ObjectIdentifiers.ECDsaWithSha1, "SHA1", "ECDSA");
AddEntries(X9ObjectIdentifiers.ECDsaWithSha224, "SHA224", "ECDSA");
AddEntries(X9ObjectIdentifiers.ECDsaWithSha256, "SHA256", "ECDSA");
AddEntries(X9ObjectIdentifiers.ECDsaWithSha384, "SHA384", "ECDSA");
AddEntries(X9ObjectIdentifiers.ECDsaWithSha512, "SHA512", "ECDSA");
AddEntries(X9ObjectIdentifiers.IdDsaWithSha1, "SHA1", "DSA");
AddEntries(EacObjectIdentifiers.id_TA_ECDSA_SHA_1, "SHA1", "ECDSA");
AddEntries(EacObjectIdentifiers.id_TA_ECDSA_SHA_224, "SHA224", "ECDSA");
AddEntries(EacObjectIdentifiers.id_TA_ECDSA_SHA_256, "SHA256", "ECDSA");
AddEntries(EacObjectIdentifiers.id_TA_ECDSA_SHA_384, "SHA384", "ECDSA");
AddEntries(EacObjectIdentifiers.id_TA_ECDSA_SHA_512, "SHA512", "ECDSA");
AddEntries(EacObjectIdentifiers.id_TA_RSA_v1_5_SHA_1, "SHA1", "RSA");
AddEntries(EacObjectIdentifiers.id_TA_RSA_v1_5_SHA_256, "SHA256", "RSA");
AddEntries(EacObjectIdentifiers.id_TA_RSA_PSS_SHA_1, "SHA1", "RSAandMGF1");
AddEntries(EacObjectIdentifiers.id_TA_RSA_PSS_SHA_256, "SHA256", "RSAandMGF1");
encryptionAlgs.Add(X9ObjectIdentifiers.IdDsa.Id, "DSA");
encryptionAlgs.Add(PkcsObjectIdentifiers.RsaEncryption.Id, "RSA");
encryptionAlgs.Add(TeleTrusTObjectIdentifiers.TeleTrusTRsaSignatureAlgorithm, "RSA");
encryptionAlgs.Add(X509ObjectIdentifiers.IdEARsa.Id, "RSA");
encryptionAlgs.Add(CmsSignedGenerator.EncryptionRsaPss, "RSAandMGF1");
encryptionAlgs.Add(CryptoProObjectIdentifiers.GostR3410x94.Id, "GOST3410");
encryptionAlgs.Add(CryptoProObjectIdentifiers.GostR3410x2001.Id, "ECGOST3410");
encryptionAlgs.Add("1.3.6.1.4.1.5849.1.6.2", "ECGOST3410");
encryptionAlgs.Add("1.3.6.1.4.1.5849.1.1.5", "GOST3410");
digestAlgs.Add(PkcsObjectIdentifiers.MD2.Id, "MD2");
digestAlgs.Add(PkcsObjectIdentifiers.MD4.Id, "MD4");
digestAlgs.Add(PkcsObjectIdentifiers.MD5.Id, "MD5");
digestAlgs.Add(OiwObjectIdentifiers.IdSha1.Id, "SHA1");
digestAlgs.Add(NistObjectIdentifiers.IdSha224.Id, "SHA224");
digestAlgs.Add(NistObjectIdentifiers.IdSha256.Id, "SHA256");
digestAlgs.Add(NistObjectIdentifiers.IdSha384.Id, "SHA384");
digestAlgs.Add(NistObjectIdentifiers.IdSha512.Id, "SHA512");
digestAlgs.Add(TeleTrusTObjectIdentifiers.RipeMD128.Id, "RIPEMD128");
digestAlgs.Add(TeleTrusTObjectIdentifiers.RipeMD160.Id, "RIPEMD160");
digestAlgs.Add(TeleTrusTObjectIdentifiers.RipeMD256.Id, "RIPEMD256");
digestAlgs.Add(CryptoProObjectIdentifiers.GostR3411.Id, "GOST3411");
digestAlgs.Add("1.3.6.1.4.1.5849.1.2.1", "GOST3411");
digestAliases.Add("SHA1", new string[] { "SHA-1" });
digestAliases.Add("SHA224", new string[] { "SHA-224" });
digestAliases.Add("SHA256", new string[] { "SHA-256" });
digestAliases.Add("SHA384", new string[] { "SHA-384" });
digestAliases.Add("SHA512", new string[] { "SHA-512" });
}
/**
* Return the digest algorithm using one of the standard JCA string
* representations rather than the algorithm identifier (if possible).
*/
internal string GetDigestAlgName(
string digestAlgOid)
{
string algName = (string)digestAlgs[digestAlgOid];
if (algName != null)
{
return algName;
}
return digestAlgOid;
}
internal string[] GetDigestAliases(
string algName)
{
string[] aliases = (string[]) digestAliases[algName];
return aliases == null ? new String[0] : (string[]) aliases.Clone();
}
/**
* Return the digest encryption algorithm using one of the standard
* JCA string representations rather than the algorithm identifier (if
* possible).
*/
internal string GetEncryptionAlgName(
string encryptionAlgOid)
{
string algName = (string) encryptionAlgs[encryptionAlgOid];
if (algName != null)
{
return algName;
}
return encryptionAlgOid;
}
internal IDigest GetDigestInstance(
string algorithm)
{
try
{
return DigestUtilities.GetDigest(algorithm);
}
catch (SecurityUtilityException e)
{
// This is probably superfluous on C#, since no provider infrastructure,
// assuming DigestUtilities already knows all the aliases
foreach (string alias in GetDigestAliases(algorithm))
{
try { return DigestUtilities.GetDigest(alias); }
catch (SecurityUtilityException) {}
}
throw e;
}
}
internal ISigner GetSignatureInstance(
string algorithm)
{
return SignerUtilities.GetSigner(algorithm);
}
internal IX509Store CreateAttributeStore(
string type,
Asn1Set certSet)
{
IList certs = Platform.CreateArrayList();
if (certSet != null)
{
foreach (Asn1Encodable ae in certSet)
{
try
{
Asn1Object obj = ae.ToAsn1Object();
if (obj is Asn1TaggedObject)
{
Asn1TaggedObject tagged = (Asn1TaggedObject)obj;
if (tagged.TagNo == 2)
{
certs.Add(
new X509V2AttributeCertificate(
Asn1Sequence.GetInstance(tagged, false).GetEncoded()));
}
}
}
catch (Exception ex)
{
throw new CmsException("can't re-encode attribute certificate!", ex);
}
}
}
try
{
return X509StoreFactory.Create(
"AttributeCertificate/" + type,
new X509CollectionStoreParameters(certs));
}
catch (ArgumentException e)
{
throw new CmsException("can't setup the X509Store", e);
}
}
internal IX509Store CreateCertificateStore(
string type,
Asn1Set certSet)
{
IList certs = Platform.CreateArrayList();
if (certSet != null)
{
AddCertsFromSet(certs, certSet);
}
try
{
return X509StoreFactory.Create(
"Certificate/" + type,
new X509CollectionStoreParameters(certs));
}
catch (ArgumentException e)
{
throw new CmsException("can't setup the X509Store", e);
}
}
internal IX509Store CreateCrlStore(
string type,
Asn1Set crlSet)
{
IList crls = Platform.CreateArrayList();
if (crlSet != null)
{
AddCrlsFromSet(crls, crlSet);
}
try
{
return X509StoreFactory.Create(
"CRL/" + type,
new X509CollectionStoreParameters(crls));
}
catch (ArgumentException e)
{
throw new CmsException("can't setup the X509Store", e);
}
}
private void AddCertsFromSet(
IList certs,
Asn1Set certSet)
{
X509CertificateParser cf = new X509CertificateParser();
foreach (Asn1Encodable ae in certSet)
{
try
{
Asn1Object obj = ae.ToAsn1Object();
if (obj is Asn1Sequence)
{
// TODO Build certificate directly from sequence?
certs.Add(cf.ReadCertificate(obj.GetEncoded()));
}
}
catch (Exception ex)
{
throw new CmsException("can't re-encode certificate!", ex);
}
}
}
private void AddCrlsFromSet(
IList crls,
Asn1Set crlSet)
{
X509CrlParser cf = new X509CrlParser();
foreach (Asn1Encodable ae in crlSet)
{
try
{
// TODO Build CRL directly from ae.ToAsn1Object()?
crls.Add(cf.ReadCrl(ae.GetEncoded()));
}
catch (Exception ex)
{
throw new CmsException("can't re-encode CRL!", ex);
}
}
}
internal AlgorithmIdentifier FixAlgID(
AlgorithmIdentifier algId)
{
if (algId.Parameters == null)
return new AlgorithmIdentifier(algId.ObjectID, DerNull.Instance);
return algId;
}
}
}
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