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diff --git a/libraries/spongycastle/pkix/src/main/java/org/spongycastle/operator/DefaultSignatureAlgorithmIdentifierFinder.java b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/operator/DefaultSignatureAlgorithmIdentifierFinder.java
new file mode 100644
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+++ b/libraries/spongycastle/pkix/src/main/java/org/spongycastle/operator/DefaultSignatureAlgorithmIdentifierFinder.java
@@ -0,0 +1,212 @@
+package org.spongycastle.operator;
+
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+import org.spongycastle.asn1.ASN1Encodable;
+import org.spongycastle.asn1.ASN1Integer;
+import org.spongycastle.asn1.ASN1ObjectIdentifier;
+import org.spongycastle.asn1.DERNull;
+import org.spongycastle.asn1.cryptopro.CryptoProObjectIdentifiers;
+import org.spongycastle.asn1.nist.NISTObjectIdentifiers;
+import org.spongycastle.asn1.oiw.OIWObjectIdentifiers;
+import org.spongycastle.asn1.pkcs.PKCSObjectIdentifiers;
+import org.spongycastle.asn1.pkcs.RSASSAPSSparams;
+import org.spongycastle.asn1.teletrust.TeleTrusTObjectIdentifiers;
+import org.spongycastle.asn1.x509.AlgorithmIdentifier;
+import org.spongycastle.asn1.x9.X9ObjectIdentifiers;
+import org.spongycastle.util.Strings;
+
+public class DefaultSignatureAlgorithmIdentifierFinder
+ implements SignatureAlgorithmIdentifierFinder
+{
+ private static Map algorithms = new HashMap();
+ private static Set noParams = new HashSet();
+ private static Map params = new HashMap();
+ private static Set pkcs15RsaEncryption = new HashSet();
+ private static Map digestOids = new HashMap();
+
+ private static final ASN1ObjectIdentifier ENCRYPTION_RSA = PKCSObjectIdentifiers.rsaEncryption;
+ private static final ASN1ObjectIdentifier ENCRYPTION_DSA = X9ObjectIdentifiers.id_dsa_with_sha1;
+ private static final ASN1ObjectIdentifier ENCRYPTION_ECDSA = X9ObjectIdentifiers.ecdsa_with_SHA1;
+ private static final ASN1ObjectIdentifier ENCRYPTION_RSA_PSS = PKCSObjectIdentifiers.id_RSASSA_PSS;
+ private static final ASN1ObjectIdentifier ENCRYPTION_GOST3410 = CryptoProObjectIdentifiers.gostR3410_94;
+ private static final ASN1ObjectIdentifier ENCRYPTION_ECGOST3410 = CryptoProObjectIdentifiers.gostR3410_2001;
+
+ static
+ {
+ algorithms.put("MD2WITHRSAENCRYPTION", PKCSObjectIdentifiers.md2WithRSAEncryption);
+ algorithms.put("MD2WITHRSA", PKCSObjectIdentifiers.md2WithRSAEncryption);
+ algorithms.put("MD5WITHRSAENCRYPTION", PKCSObjectIdentifiers.md5WithRSAEncryption);
+ algorithms.put("MD5WITHRSA", PKCSObjectIdentifiers.md5WithRSAEncryption);
+ algorithms.put("SHA1WITHRSAENCRYPTION", PKCSObjectIdentifiers.sha1WithRSAEncryption);
+ algorithms.put("SHA1WITHRSA", PKCSObjectIdentifiers.sha1WithRSAEncryption);
+ algorithms.put("SHA224WITHRSAENCRYPTION", PKCSObjectIdentifiers.sha224WithRSAEncryption);
+ algorithms.put("SHA224WITHRSA", PKCSObjectIdentifiers.sha224WithRSAEncryption);
+ algorithms.put("SHA256WITHRSAENCRYPTION", PKCSObjectIdentifiers.sha256WithRSAEncryption);
+ algorithms.put("SHA256WITHRSA", PKCSObjectIdentifiers.sha256WithRSAEncryption);
+ algorithms.put("SHA384WITHRSAENCRYPTION", PKCSObjectIdentifiers.sha384WithRSAEncryption);
+ algorithms.put("SHA384WITHRSA", PKCSObjectIdentifiers.sha384WithRSAEncryption);
+ algorithms.put("SHA512WITHRSAENCRYPTION", PKCSObjectIdentifiers.sha512WithRSAEncryption);
+ algorithms.put("SHA512WITHRSA", PKCSObjectIdentifiers.sha512WithRSAEncryption);
+ algorithms.put("SHA1WITHRSAANDMGF1", PKCSObjectIdentifiers.id_RSASSA_PSS);
+ algorithms.put("SHA224WITHRSAANDMGF1", PKCSObjectIdentifiers.id_RSASSA_PSS);
+ algorithms.put("SHA256WITHRSAANDMGF1", PKCSObjectIdentifiers.id_RSASSA_PSS);
+ algorithms.put("SHA384WITHRSAANDMGF1", PKCSObjectIdentifiers.id_RSASSA_PSS);
+ algorithms.put("SHA512WITHRSAANDMGF1", PKCSObjectIdentifiers.id_RSASSA_PSS);
+ algorithms.put("RIPEMD160WITHRSAENCRYPTION", TeleTrusTObjectIdentifiers.rsaSignatureWithripemd160);
+ algorithms.put("RIPEMD160WITHRSA", TeleTrusTObjectIdentifiers.rsaSignatureWithripemd160);
+ algorithms.put("RIPEMD128WITHRSAENCRYPTION", TeleTrusTObjectIdentifiers.rsaSignatureWithripemd128);
+ algorithms.put("RIPEMD128WITHRSA", TeleTrusTObjectIdentifiers.rsaSignatureWithripemd128);
+ algorithms.put("RIPEMD256WITHRSAENCRYPTION", TeleTrusTObjectIdentifiers.rsaSignatureWithripemd256);
+ algorithms.put("RIPEMD256WITHRSA", TeleTrusTObjectIdentifiers.rsaSignatureWithripemd256);
+ algorithms.put("SHA1WITHDSA", X9ObjectIdentifiers.id_dsa_with_sha1);
+ algorithms.put("DSAWITHSHA1", X9ObjectIdentifiers.id_dsa_with_sha1);
+ algorithms.put("SHA224WITHDSA", NISTObjectIdentifiers.dsa_with_sha224);
+ algorithms.put("SHA256WITHDSA", NISTObjectIdentifiers.dsa_with_sha256);
+ algorithms.put("SHA384WITHDSA", NISTObjectIdentifiers.dsa_with_sha384);
+ algorithms.put("SHA512WITHDSA", NISTObjectIdentifiers.dsa_with_sha512);
+ algorithms.put("SHA1WITHECDSA", X9ObjectIdentifiers.ecdsa_with_SHA1);
+ algorithms.put("ECDSAWITHSHA1", X9ObjectIdentifiers.ecdsa_with_SHA1);
+ algorithms.put("SHA224WITHECDSA", X9ObjectIdentifiers.ecdsa_with_SHA224);
+ algorithms.put("SHA256WITHECDSA", X9ObjectIdentifiers.ecdsa_with_SHA256);
+ algorithms.put("SHA384WITHECDSA", X9ObjectIdentifiers.ecdsa_with_SHA384);
+ algorithms.put("SHA512WITHECDSA", X9ObjectIdentifiers.ecdsa_with_SHA512);
+ algorithms.put("GOST3411WITHGOST3410", CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_94);
+ algorithms.put("GOST3411WITHGOST3410-94", CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_94);
+ algorithms.put("GOST3411WITHECGOST3410", CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_2001);
+ algorithms.put("GOST3411WITHECGOST3410-2001", CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_2001);
+ algorithms.put("GOST3411WITHGOST3410-2001", CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_2001);
+
+ //
+ // According to RFC 3279, the ASN.1 encoding SHALL (id-dsa-with-sha1) or MUST (ecdsa-with-SHA*) omit the parameters field.
+ // The parameters field SHALL be NULL for RSA based signature algorithms.
+ //
+ noParams.add(X9ObjectIdentifiers.ecdsa_with_SHA1);
+ noParams.add(X9ObjectIdentifiers.ecdsa_with_SHA224);
+ noParams.add(X9ObjectIdentifiers.ecdsa_with_SHA256);
+ noParams.add(X9ObjectIdentifiers.ecdsa_with_SHA384);
+ noParams.add(X9ObjectIdentifiers.ecdsa_with_SHA512);
+ noParams.add(X9ObjectIdentifiers.id_dsa_with_sha1);
+ noParams.add(NISTObjectIdentifiers.dsa_with_sha224);
+ noParams.add(NISTObjectIdentifiers.dsa_with_sha256);
+ noParams.add(NISTObjectIdentifiers.dsa_with_sha384);
+ noParams.add(NISTObjectIdentifiers.dsa_with_sha512);
+
+ //
+ // RFC 4491
+ //
+ noParams.add(CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_94);
+ noParams.add(CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_2001);
+
+ //
+ // PKCS 1.5 encrypted algorithms
+ //
+ pkcs15RsaEncryption.add(PKCSObjectIdentifiers.sha1WithRSAEncryption);
+ pkcs15RsaEncryption.add(PKCSObjectIdentifiers.sha224WithRSAEncryption);
+ pkcs15RsaEncryption.add(PKCSObjectIdentifiers.sha256WithRSAEncryption);
+ pkcs15RsaEncryption.add(PKCSObjectIdentifiers.sha384WithRSAEncryption);
+ pkcs15RsaEncryption.add(PKCSObjectIdentifiers.sha512WithRSAEncryption);
+ pkcs15RsaEncryption.add(TeleTrusTObjectIdentifiers.rsaSignatureWithripemd128);
+ pkcs15RsaEncryption.add(TeleTrusTObjectIdentifiers.rsaSignatureWithripemd160);
+ pkcs15RsaEncryption.add(TeleTrusTObjectIdentifiers.rsaSignatureWithripemd256);
+
+ //
+ // explicit params
+ //
+ AlgorithmIdentifier sha1AlgId = new AlgorithmIdentifier(OIWObjectIdentifiers.idSHA1, DERNull.INSTANCE);
+ params.put("SHA1WITHRSAANDMGF1", createPSSParams(sha1AlgId, 20));
+
+ AlgorithmIdentifier sha224AlgId = new AlgorithmIdentifier(NISTObjectIdentifiers.id_sha224, DERNull.INSTANCE);
+ params.put("SHA224WITHRSAANDMGF1", createPSSParams(sha224AlgId, 28));
+
+ AlgorithmIdentifier sha256AlgId = new AlgorithmIdentifier(NISTObjectIdentifiers.id_sha256, DERNull.INSTANCE);
+ params.put("SHA256WITHRSAANDMGF1", createPSSParams(sha256AlgId, 32));
+
+ AlgorithmIdentifier sha384AlgId = new AlgorithmIdentifier(NISTObjectIdentifiers.id_sha384, DERNull.INSTANCE);
+ params.put("SHA384WITHRSAANDMGF1", createPSSParams(sha384AlgId, 48));
+
+ AlgorithmIdentifier sha512AlgId = new AlgorithmIdentifier(NISTObjectIdentifiers.id_sha512, DERNull.INSTANCE);
+ params.put("SHA512WITHRSAANDMGF1", createPSSParams(sha512AlgId, 64));
+
+ //
+ // digests
+ //
+ digestOids.put(PKCSObjectIdentifiers.sha224WithRSAEncryption, NISTObjectIdentifiers.id_sha224);
+ digestOids.put(PKCSObjectIdentifiers.sha256WithRSAEncryption, NISTObjectIdentifiers.id_sha256);
+ digestOids.put(PKCSObjectIdentifiers.sha384WithRSAEncryption, NISTObjectIdentifiers.id_sha384);
+ digestOids.put(PKCSObjectIdentifiers.sha512WithRSAEncryption, NISTObjectIdentifiers.id_sha512);
+ digestOids.put(PKCSObjectIdentifiers.md2WithRSAEncryption, PKCSObjectIdentifiers.md2);
+ digestOids.put(PKCSObjectIdentifiers.md4WithRSAEncryption, PKCSObjectIdentifiers.md4);
+ digestOids.put(PKCSObjectIdentifiers.md5WithRSAEncryption, PKCSObjectIdentifiers.md5);
+ digestOids.put(PKCSObjectIdentifiers.sha1WithRSAEncryption, OIWObjectIdentifiers.idSHA1);
+ digestOids.put(TeleTrusTObjectIdentifiers.rsaSignatureWithripemd128, TeleTrusTObjectIdentifiers.ripemd128);
+ digestOids.put(TeleTrusTObjectIdentifiers.rsaSignatureWithripemd160, TeleTrusTObjectIdentifiers.ripemd160);
+ digestOids.put(TeleTrusTObjectIdentifiers.rsaSignatureWithripemd256, TeleTrusTObjectIdentifiers.ripemd256);
+ digestOids.put(CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_94, CryptoProObjectIdentifiers.gostR3411);
+ digestOids.put(CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_2001, CryptoProObjectIdentifiers.gostR3411);
+ }
+
+ private static AlgorithmIdentifier generate(String signatureAlgorithm)
+ {
+ AlgorithmIdentifier sigAlgId;
+ AlgorithmIdentifier encAlgId;
+ AlgorithmIdentifier digAlgId;
+
+ String algorithmName = Strings.toUpperCase(signatureAlgorithm);
+ ASN1ObjectIdentifier sigOID = (ASN1ObjectIdentifier)algorithms.get(algorithmName);
+ if (sigOID == null)
+ {
+ throw new IllegalArgumentException("Unknown signature type requested: " + algorithmName);
+ }
+
+ if (noParams.contains(sigOID))
+ {
+ sigAlgId = new AlgorithmIdentifier(sigOID);
+ }
+ else if (params.containsKey(algorithmName))
+ {
+ sigAlgId = new AlgorithmIdentifier(sigOID, (ASN1Encodable)params.get(algorithmName));
+ }
+ else
+ {
+ sigAlgId = new AlgorithmIdentifier(sigOID, DERNull.INSTANCE);
+ }
+
+ if (pkcs15RsaEncryption.contains(sigOID))
+ {
+ encAlgId = new AlgorithmIdentifier(PKCSObjectIdentifiers.rsaEncryption, DERNull.INSTANCE);
+ }
+ else
+ {
+ encAlgId = sigAlgId;
+ }
+
+ if (sigAlgId.getAlgorithm().equals(PKCSObjectIdentifiers.id_RSASSA_PSS))
+ {
+ digAlgId = ((RSASSAPSSparams)sigAlgId.getParameters()).getHashAlgorithm();
+ }
+ else
+ {
+ digAlgId = new AlgorithmIdentifier((ASN1ObjectIdentifier)digestOids.get(sigOID), DERNull.INSTANCE);
+ }
+
+ return sigAlgId;
+ }
+
+ private static RSASSAPSSparams createPSSParams(AlgorithmIdentifier hashAlgId, int saltSize)
+ {
+ return new RSASSAPSSparams(
+ hashAlgId,
+ new AlgorithmIdentifier(PKCSObjectIdentifiers.id_mgf1, hashAlgId),
+ new ASN1Integer(saltSize),
+ new ASN1Integer(1));
+ }
+
+ public AlgorithmIdentifier find(String sigAlgName)
+ {
+ return generate(sigAlgName);
+ }
+} \ No newline at end of file