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Andrey K. Choi
2025-10-09 09:57:24 +09:00
commit 4d551bd74f
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output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Security/ParameterUtilities.cs Normal file
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using System;
using System.Collections;
using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.CryptoPro;
using Org.BouncyCastle.Asn1.Kisa;
using Org.BouncyCastle.Asn1.Misc;
using Org.BouncyCastle.Asn1.Nist;
using Org.BouncyCastle.Asn1.Ntt;
using Org.BouncyCastle.Asn1.Oiw;
using Org.BouncyCastle.Asn1.Pkcs;
using Org.BouncyCastle.Crypto;
using Org.BouncyCastle.Crypto.Parameters;
using Org.BouncyCastle.Utilities;
namespace Org.BouncyCastle.Security;
public sealed class ParameterUtilities
{
private static readonly IDictionary algorithms;
private static readonly IDictionary basicIVSizes;
private ParameterUtilities()
{
}
static ParameterUtilities()
{
algorithms = Platform.CreateHashtable();
basicIVSizes = Platform.CreateHashtable();
AddAlgorithm("AES", "AESWRAP");
AddAlgorithm("AES128", "2.16.840.1.101.3.4.2", NistObjectIdentifiers.IdAes128Cbc, NistObjectIdentifiers.IdAes128Cfb, NistObjectIdentifiers.IdAes128Ecb, NistObjectIdentifiers.IdAes128Ofb, NistObjectIdentifiers.IdAes128Wrap);
AddAlgorithm("AES192", "2.16.840.1.101.3.4.22", NistObjectIdentifiers.IdAes192Cbc, NistObjectIdentifiers.IdAes192Cfb, NistObjectIdentifiers.IdAes192Ecb, NistObjectIdentifiers.IdAes192Ofb, NistObjectIdentifiers.IdAes192Wrap);
AddAlgorithm("AES256", "2.16.840.1.101.3.4.42", NistObjectIdentifiers.IdAes256Cbc, NistObjectIdentifiers.IdAes256Cfb, NistObjectIdentifiers.IdAes256Ecb, NistObjectIdentifiers.IdAes256Ofb, NistObjectIdentifiers.IdAes256Wrap);
AddAlgorithm("BLOWFISH", "1.3.6.1.4.1.3029.1.2");
AddAlgorithm("CAMELLIA", "CAMELLIAWRAP");
AddAlgorithm("CAMELLIA128", NttObjectIdentifiers.IdCamellia128Cbc, NttObjectIdentifiers.IdCamellia128Wrap);
AddAlgorithm("CAMELLIA192", NttObjectIdentifiers.IdCamellia192Cbc, NttObjectIdentifiers.IdCamellia192Wrap);
AddAlgorithm("CAMELLIA256", NttObjectIdentifiers.IdCamellia256Cbc, NttObjectIdentifiers.IdCamellia256Wrap);
AddAlgorithm("CAST5", "1.2.840.113533.7.66.10");
AddAlgorithm("CAST6");
AddAlgorithm("DES", OiwObjectIdentifiers.DesCbc, OiwObjectIdentifiers.DesCfb, OiwObjectIdentifiers.DesEcb, OiwObjectIdentifiers.DesOfb);
AddAlgorithm("DESEDE", "DESEDEWRAP", "TDEA", OiwObjectIdentifiers.DesEde, PkcsObjectIdentifiers.IdAlgCms3DesWrap);
AddAlgorithm("DESEDE3", PkcsObjectIdentifiers.DesEde3Cbc);
AddAlgorithm("GOST28147", "GOST", "GOST-28147", CryptoProObjectIdentifiers.GostR28147Cbc);
AddAlgorithm("HC128");
AddAlgorithm("HC256");
AddAlgorithm("IDEA", "1.3.6.1.4.1.188.7.1.1.2");
AddAlgorithm("NOEKEON");
AddAlgorithm("RC2", PkcsObjectIdentifiers.RC2Cbc, PkcsObjectIdentifiers.IdAlgCmsRC2Wrap);
AddAlgorithm("RC4", "ARC4", "1.2.840.113549.3.4");
AddAlgorithm("RC5", "RC5-32");
AddAlgorithm("RC5-64");
AddAlgorithm("RC6");
AddAlgorithm("RIJNDAEL");
AddAlgorithm("SALSA20");
AddAlgorithm("SEED", KisaObjectIdentifiers.IdNpkiAppCmsSeedWrap, KisaObjectIdentifiers.IdSeedCbc);
AddAlgorithm("SERPENT");
AddAlgorithm("SKIPJACK");
AddAlgorithm("SM4");
AddAlgorithm("TEA");
AddAlgorithm("THREEFISH-256");
AddAlgorithm("THREEFISH-512");
AddAlgorithm("THREEFISH-1024");
AddAlgorithm("TNEPRES");
AddAlgorithm("TWOFISH");
AddAlgorithm("VMPC");
AddAlgorithm("VMPC-KSA3");
AddAlgorithm("XTEA");
AddBasicIVSizeEntries(8, "BLOWFISH", "DES", "DESEDE", "DESEDE3");
AddBasicIVSizeEntries(16, "AES", "AES128", "AES192", "AES256", "CAMELLIA", "CAMELLIA128", "CAMELLIA192", "CAMELLIA256", "NOEKEON", "SEED", "SM4");
}
private static void AddAlgorithm(string canonicalName, params object[] aliases)
{
algorithms[canonicalName] = canonicalName;
foreach (object obj in aliases)
{
algorithms[obj.ToString()] = canonicalName;
}
}
private static void AddBasicIVSizeEntries(int size, params string[] algorithms)
{
foreach (string key in algorithms)
{
basicIVSizes.Add(key, size);
}
}
public static string GetCanonicalAlgorithmName(string algorithm)
{
return (string)algorithms[Platform.ToUpperInvariant(algorithm)];
}
public static KeyParameter CreateKeyParameter(DerObjectIdentifier algOid, byte[] keyBytes)
{
return CreateKeyParameter(algOid.Id, keyBytes, 0, keyBytes.Length);
}
public static KeyParameter CreateKeyParameter(string algorithm, byte[] keyBytes)
{
return CreateKeyParameter(algorithm, keyBytes, 0, keyBytes.Length);
}
public static KeyParameter CreateKeyParameter(DerObjectIdentifier algOid, byte[] keyBytes, int offset, int length)
{
return CreateKeyParameter(algOid.Id, keyBytes, offset, length);
}
public static KeyParameter CreateKeyParameter(string algorithm, byte[] keyBytes, int offset, int length)
{
if (algorithm == null)
{
throw new ArgumentNullException("algorithm");
}
string canonicalAlgorithmName = GetCanonicalAlgorithmName(algorithm);
if (canonicalAlgorithmName == null)
{
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
switch (canonicalAlgorithmName)
{
case "DES":
return new DesParameters(keyBytes, offset, length);
case "DESEDE":
case "DESEDE3":
return new DesEdeParameters(keyBytes, offset, length);
case "RC2":
return new RC2Parameters(keyBytes, offset, length);
default:
return new KeyParameter(keyBytes, offset, length);
}
}
public static ICipherParameters GetCipherParameters(DerObjectIdentifier algOid, ICipherParameters key, Asn1Object asn1Params)
{
return GetCipherParameters(algOid.Id, key, asn1Params);
}
public static ICipherParameters GetCipherParameters(string algorithm, ICipherParameters key, Asn1Object asn1Params)
{
if (algorithm == null)
{
throw new ArgumentNullException("algorithm");
}
string canonicalAlgorithmName = GetCanonicalAlgorithmName(algorithm);
if (canonicalAlgorithmName == null)
{
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
byte[] array = null;
try
{
int num = FindBasicIVSize(canonicalAlgorithmName);
if (num == -1)
{
switch (canonicalAlgorithmName)
{
default:
goto end_IL_0030;
case "RIJNDAEL":
case "SKIPJACK":
case "TWOFISH":
break;
case "CAST5":
array = Cast5CbcParameters.GetInstance(asn1Params).GetIV();
goto end_IL_0030;
case "IDEA":
array = IdeaCbcPar.GetInstance(asn1Params).GetIV();
goto end_IL_0030;
case "RC2":
array = RC2CbcParameter.GetInstance(asn1Params).GetIV();
goto end_IL_0030;
}
}
array = ((Asn1OctetString)asn1Params).GetOctets();
end_IL_0030:;
}
catch (Exception innerException)
{
throw new ArgumentException("Could not process ASN.1 parameters", innerException);
}
if (array != null)
{
return new ParametersWithIV(key, array);
}
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
public static Asn1Encodable GenerateParameters(DerObjectIdentifier algID, SecureRandom random)
{
return GenerateParameters(algID.Id, random);
}
public static Asn1Encodable GenerateParameters(string algorithm, SecureRandom random)
{
if (algorithm == null)
{
throw new ArgumentNullException("algorithm");
}
string canonicalAlgorithmName = GetCanonicalAlgorithmName(algorithm);
if (canonicalAlgorithmName == null)
{
throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised.");
}
int num = FindBasicIVSize(canonicalAlgorithmName);
if (num != -1)
{
return CreateIVOctetString(random, num);
}
return canonicalAlgorithmName switch
{
"CAST5" => new Cast5CbcParameters(CreateIV(random, 8), 128),
"IDEA" => new IdeaCbcPar(CreateIV(random, 8)),
"RC2" => new RC2CbcParameter(CreateIV(random, 8)),
_ => throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised."),
};
}
public static ICipherParameters WithRandom(ICipherParameters cp, SecureRandom random)
{
if (random != null)
{
cp = new ParametersWithRandom(cp, random);
}
return cp;
}
private static Asn1OctetString CreateIVOctetString(SecureRandom random, int ivLength)
{
return new DerOctetString(CreateIV(random, ivLength));
}
private static byte[] CreateIV(SecureRandom random, int ivLength)
{
byte[] array = new byte[ivLength];
random.NextBytes(array);
return array;
}
private static int FindBasicIVSize(string canonicalName)
{
if (!basicIVSizes.Contains(canonicalName))
{
return -1;
}
return (int)basicIVSizes[canonicalName];
}
}