1b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallampackage org.bouncycastle.asn1.pkcs; 2b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 3b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallamimport org.bouncycastle.asn1.ASN1EncodableVector; 44c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstromimport org.bouncycastle.asn1.ASN1Object; 54c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstromimport org.bouncycastle.asn1.ASN1Primitive; 6b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallamimport org.bouncycastle.asn1.ASN1Sequence; 7b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallamimport org.bouncycastle.asn1.ASN1TaggedObject; 8b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallamimport org.bouncycastle.asn1.DERNull; 9b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallamimport org.bouncycastle.asn1.DEROctetString; 10b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallamimport org.bouncycastle.asn1.DERSequence; 11b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallamimport org.bouncycastle.asn1.DERTaggedObject; 12b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallamimport org.bouncycastle.asn1.oiw.OIWObjectIdentifiers; 13b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallamimport org.bouncycastle.asn1.x509.AlgorithmIdentifier; 14b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 15b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallampublic class RSAESOAEPparams 164c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom extends ASN1Object 17b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam{ 18b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam private AlgorithmIdentifier hashAlgorithm; 19b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam private AlgorithmIdentifier maskGenAlgorithm; 20b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam private AlgorithmIdentifier pSourceAlgorithm; 21b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 22b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam // BEGIN android-changed 23c37f4a04ef89e73a39a59f3c5a179af8c8ab5974Brian Carlstrom public final static AlgorithmIdentifier DEFAULT_HASH_ALGORITHM = new AlgorithmIdentifier(OIWObjectIdentifiers.idSHA1, DERNull.INSTANCE); 24b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam // END android-changed 25b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam public final static AlgorithmIdentifier DEFAULT_MASK_GEN_FUNCTION = new AlgorithmIdentifier(PKCSObjectIdentifiers.id_mgf1, DEFAULT_HASH_ALGORITHM); 26b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam public final static AlgorithmIdentifier DEFAULT_P_SOURCE_ALGORITHM = new AlgorithmIdentifier(PKCSObjectIdentifiers.id_pSpecified, new DEROctetString(new byte[0])); 27b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 28b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam public static RSAESOAEPparams getInstance( 29b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam Object obj) 30b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam { 31b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam if (obj instanceof RSAESOAEPparams) 32b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam { 33b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam return (RSAESOAEPparams)obj; 34b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam } 354c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom else if (obj != null) 36b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam { 374c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom return new RSAESOAEPparams(ASN1Sequence.getInstance(obj)); 38b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam } 39b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 404c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom return null; 41b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam } 42b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 43b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam /** 44b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * The default version 45b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam */ 46b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam public RSAESOAEPparams() 47b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam { 48b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam hashAlgorithm = DEFAULT_HASH_ALGORITHM; 49b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam maskGenAlgorithm = DEFAULT_MASK_GEN_FUNCTION; 50b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam pSourceAlgorithm = DEFAULT_P_SOURCE_ALGORITHM; 51b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam } 52b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 53b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam public RSAESOAEPparams( 54b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam AlgorithmIdentifier hashAlgorithm, 55b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam AlgorithmIdentifier maskGenAlgorithm, 56b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam AlgorithmIdentifier pSourceAlgorithm) 57b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam { 58b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam this.hashAlgorithm = hashAlgorithm; 59b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam this.maskGenAlgorithm = maskGenAlgorithm; 60b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam this.pSourceAlgorithm = pSourceAlgorithm; 61b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam } 62b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 63b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam public RSAESOAEPparams( 64b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam ASN1Sequence seq) 65b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam { 66b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam hashAlgorithm = DEFAULT_HASH_ALGORITHM; 67b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam maskGenAlgorithm = DEFAULT_MASK_GEN_FUNCTION; 68b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam pSourceAlgorithm = DEFAULT_P_SOURCE_ALGORITHM; 69b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 70b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam for (int i = 0; i != seq.size(); i++) 71b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam { 72b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam ASN1TaggedObject o = (ASN1TaggedObject)seq.getObjectAt(i); 73b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 74b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam switch (o.getTagNo()) 75b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam { 76b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam case 0: 77b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam hashAlgorithm = AlgorithmIdentifier.getInstance(o, true); 78b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam break; 79b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam case 1: 80b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam maskGenAlgorithm = AlgorithmIdentifier.getInstance(o, true); 81b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam break; 82b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam case 2: 83b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam pSourceAlgorithm = AlgorithmIdentifier.getInstance(o, true); 84b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam break; 85b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam default: 86b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam throw new IllegalArgumentException("unknown tag"); 87b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam } 88b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam } 89b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam } 90b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 91b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam public AlgorithmIdentifier getHashAlgorithm() 92b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam { 93b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam return hashAlgorithm; 94b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam } 95b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 96b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam public AlgorithmIdentifier getMaskGenAlgorithm() 97b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam { 98b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam return maskGenAlgorithm; 99b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam } 100b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 101b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam public AlgorithmIdentifier getPSourceAlgorithm() 102b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam { 103b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam return pSourceAlgorithm; 104b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam } 105b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 106b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam /** 107b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * <pre> 108b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * RSAES-OAEP-params ::= SEQUENCE { 109b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * hashAlgorithm [0] OAEP-PSSDigestAlgorithms DEFAULT sha1, 110b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * maskGenAlgorithm [1] PKCS1MGFAlgorithms DEFAULT mgf1SHA1, 111b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * pSourceAlgorithm [2] PKCS1PSourceAlgorithms DEFAULT pSpecifiedEmpty 112b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * } 113b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * 114b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * OAEP-PSSDigestAlgorithms ALGORITHM-IDENTIFIER ::= { 115b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * { OID id-sha1 PARAMETERS NULL }| 116b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * { OID id-sha256 PARAMETERS NULL }| 117b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * { OID id-sha384 PARAMETERS NULL }| 118b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * { OID id-sha512 PARAMETERS NULL }, 119b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * ... -- Allows for future expansion -- 120b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * } 121b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * PKCS1MGFAlgorithms ALGORITHM-IDENTIFIER ::= { 122b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * { OID id-mgf1 PARAMETERS OAEP-PSSDigestAlgorithms }, 123b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * ... -- Allows for future expansion -- 124b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * } 125b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * PKCS1PSourceAlgorithms ALGORITHM-IDENTIFIER ::= { 126b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * { OID id-pSpecified PARAMETERS OCTET STRING }, 127b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * ... -- Allows for future expansion -- 128b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * } 129b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * </pre> 130b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam * @return the asn1 primitive representing the parameters. 131b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam */ 1324c111300c39cb2e27f07fc2ae3b00e23ed4443b2Brian Carlstrom public ASN1Primitive toASN1Primitive() 133b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam { 134b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam ASN1EncodableVector v = new ASN1EncodableVector(); 135b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 136b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam if (!hashAlgorithm.equals(DEFAULT_HASH_ALGORITHM)) 137b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam { 138b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam v.add(new DERTaggedObject(true, 0, hashAlgorithm)); 139b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam } 140b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 141b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam if (!maskGenAlgorithm.equals(DEFAULT_MASK_GEN_FUNCTION)) 142b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam { 143b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam v.add(new DERTaggedObject(true, 1, maskGenAlgorithm)); 144b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam } 145b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 146b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam if (!pSourceAlgorithm.equals(DEFAULT_P_SOURCE_ALGORITHM)) 147b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam { 148b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam v.add(new DERTaggedObject(true, 2, pSourceAlgorithm)); 149b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam } 150b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam 151b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam return new DERSequence(v); 152b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam } 153b61a96e7ef1a78acf013bbf08fe537e5b5f129caPeter Hallam} 154