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.Nsri; 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 ParameterUtilities() { } private static readonly IDictionary algorithms = Platform.CreateHashtable(); private static readonly IDictionary basicIVSizes = Platform.CreateHashtable(); static ParameterUtilities() { AddAlgorithm("AES", "AESWRAP"); AddAlgorithm("AES128", "2.16.840.1.101.3.4.2", NistObjectIdentifiers.IdAes128Cbc, NistObjectIdentifiers.IdAes128Ccm, NistObjectIdentifiers.IdAes128Cfb, NistObjectIdentifiers.IdAes128Ecb, NistObjectIdentifiers.IdAes128Gcm, NistObjectIdentifiers.IdAes128Ofb, NistObjectIdentifiers.IdAes128Wrap); AddAlgorithm("AES192", "2.16.840.1.101.3.4.22", NistObjectIdentifiers.IdAes192Cbc, NistObjectIdentifiers.IdAes192Ccm, NistObjectIdentifiers.IdAes192Cfb, NistObjectIdentifiers.IdAes192Ecb, NistObjectIdentifiers.IdAes192Gcm, NistObjectIdentifiers.IdAes192Ofb, NistObjectIdentifiers.IdAes192Wrap); AddAlgorithm("AES256", "2.16.840.1.101.3.4.42", NistObjectIdentifiers.IdAes256Cbc, NistObjectIdentifiers.IdAes256Ccm, NistObjectIdentifiers.IdAes256Cfb, NistObjectIdentifiers.IdAes256Ecb, NistObjectIdentifiers.IdAes256Gcm, NistObjectIdentifiers.IdAes256Ofb, NistObjectIdentifiers.IdAes256Wrap); AddAlgorithm("ARIA"); AddAlgorithm("ARIA128", NsriObjectIdentifiers.id_aria128_cbc, NsriObjectIdentifiers.id_aria128_ccm, NsriObjectIdentifiers.id_aria128_cfb, NsriObjectIdentifiers.id_aria128_ctr, NsriObjectIdentifiers.id_aria128_ecb, NsriObjectIdentifiers.id_aria128_gcm, NsriObjectIdentifiers.id_aria128_ocb2, NsriObjectIdentifiers.id_aria128_ofb); AddAlgorithm("ARIA192", NsriObjectIdentifiers.id_aria192_cbc, NsriObjectIdentifiers.id_aria192_ccm, NsriObjectIdentifiers.id_aria192_cfb, NsriObjectIdentifiers.id_aria192_ctr, NsriObjectIdentifiers.id_aria192_ecb, NsriObjectIdentifiers.id_aria192_gcm, NsriObjectIdentifiers.id_aria192_ocb2, NsriObjectIdentifiers.id_aria192_ofb); AddAlgorithm("ARIA256", NsriObjectIdentifiers.id_aria256_cbc, NsriObjectIdentifiers.id_aria256_ccm, NsriObjectIdentifiers.id_aria256_cfb, NsriObjectIdentifiers.id_aria256_ctr, NsriObjectIdentifiers.id_aria256_ecb, NsriObjectIdentifiers.id_aria256_gcm, NsriObjectIdentifiers.id_aria256_ocb2, NsriObjectIdentifiers.id_aria256_ofb); 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("CHACHA"); AddAlgorithm("CHACHA7539", "CHACHA20", "CHACHA20-POLY1305", PkcsObjectIdentifiers.IdAlgAeadChaCha20Poly1305); 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", "CHACHA", "DES", "DESEDE", "DESEDE3", "SALSA20"); AddBasicIVSizeEntries(12, "CHACHA7539"); AddBasicIVSizeEntries(16, "AES", "AES128", "AES192", "AES256", "ARIA", "ARIA128", "ARIA192", "ARIA256", "CAMELLIA", "CAMELLIA128", "CAMELLIA192", "CAMELLIA256", "NOEKEON", "SEED", "SM4"); // TODO These algorithms support an IV // but JCE doesn't seem to provide an AlgorithmParametersGenerator for them // "RIJNDAEL", "SKIPJACK", "TWOFISH" } private static void AddAlgorithm( string canonicalName, params object[] aliases) { algorithms[canonicalName] = canonicalName; foreach (object alias in aliases) { algorithms[alias.ToString()] = canonicalName; } } private static void AddBasicIVSizeEntries(int size, params string[] algorithms) { foreach (string algorithm in algorithms) { basicIVSizes.Add(algorithm, 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 canonical = GetCanonicalAlgorithmName(algorithm); if (canonical == null) throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised."); if (canonical == "DES") return new DesParameters(keyBytes, offset, length); if (canonical == "DESEDE" || canonical =="DESEDE3") return new DesEdeParameters(keyBytes, offset, length); if (canonical == "RC2") return new RC2Parameters(keyBytes, offset, length); 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 canonical = GetCanonicalAlgorithmName(algorithm); if (canonical == null) throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised."); byte[] iv = null; try { // TODO These algorithms support an IV // but JCE doesn't seem to provide an AlgorithmParametersGenerator for them // "RIJNDAEL", "SKIPJACK", "TWOFISH" int basicIVKeySize = FindBasicIVSize(canonical); if (basicIVKeySize != -1 || canonical == "RIJNDAEL" || canonical == "SKIPJACK" || canonical == "TWOFISH") { iv = ((Asn1OctetString) asn1Params).GetOctets(); } else if (canonical == "CAST5") { iv = Cast5CbcParameters.GetInstance(asn1Params).GetIV(); } else if (canonical == "IDEA") { iv = IdeaCbcPar.GetInstance(asn1Params).GetIV(); } else if (canonical == "RC2") { iv = RC2CbcParameter.GetInstance(asn1Params).GetIV(); } } catch (Exception e) { throw new ArgumentException("Could not process ASN.1 parameters", e); } if (iv != null) { return new ParametersWithIV(key, iv); } 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 canonical = GetCanonicalAlgorithmName(algorithm); if (canonical == null) throw new SecurityUtilityException("Algorithm " + algorithm + " not recognised."); // TODO These algorithms support an IV // but JCE doesn't seem to provide an AlgorithmParametersGenerator for them // "RIJNDAEL", "SKIPJACK", "TWOFISH" int basicIVKeySize = FindBasicIVSize(canonical); if (basicIVKeySize != -1) return CreateIVOctetString(random, basicIVKeySize); if (canonical == "CAST5") return new Cast5CbcParameters(CreateIV(random, 8), 128); if (canonical == "IDEA") return new IdeaCbcPar(CreateIV(random, 8)); if (canonical == "RC2") return 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) { return SecureRandom.GetNextBytes(random, ivLength); } private static int FindBasicIVSize( string canonicalName) { if (!basicIVSizes.Contains(canonicalName)) return -1; return (int)basicIVSizes[canonicalName]; } } }