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*
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
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package sun.security.ssl;
import java.util.HashSet;
import java.util.Set;
import sun.security.util.AlgorithmDecomposer;
import static sun.security.ssl.CipherSuite.*;
import static sun.security.ssl.CipherSuite.KeyExchange.*;
/**
* The class decomposes standard SSL/TLS cipher suites into sub-elements.
*/
class SSLAlgorithmDecomposer extends AlgorithmDecomposer {
// indicates that only certification path algorithms need to be used
private final boolean onlyX509;
SSLAlgorithmDecomposer(boolean onlyX509) {
this.onlyX509 = onlyX509;
}
SSLAlgorithmDecomposer() {
this(false);
}
private Set<String> decomposes(CipherSuite.KeyExchange keyExchange) {
Set<String> components = new HashSet<>();
switch (keyExchange) {
case K_NULL:
if (!onlyX509) {
components.add("K_NULL");
}
break;
case K_RSA:
components.add("RSA");
break;
case K_RSA_EXPORT:
components.add("RSA");
components.add("RSA_EXPORT");
break;
case K_DH_RSA:
components.add("RSA");
components.add("DH");
components.add("DiffieHellman");
components.add("DH_RSA");
break;
case K_DH_DSS:
components.add("DSA");
components.add("DSS");
components.add("DH");
components.add("DiffieHellman");
components.add("DH_DSS");
break;
case K_DHE_DSS:
components.add("DSA");
components.add("DSS");
components.add("DH");
components.add("DHE");
components.add("DiffieHellman");
components.add("DHE_DSS");
break;
case K_DHE_RSA:
components.add("RSA");
components.add("DH");
components.add("DHE");
components.add("DiffieHellman");
components.add("DHE_RSA");
break;
case K_DH_ANON:
if (!onlyX509) {
components.add("ANON");
components.add("DH");
components.add("DiffieHellman");
components.add("DH_ANON");
}
break;
case K_ECDH_ECDSA:
components.add("ECDH");
components.add("ECDSA");
components.add("ECDH_ECDSA");
break;
case K_ECDH_RSA:
components.add("ECDH");
components.add("RSA");
components.add("ECDH_RSA");
break;
case K_ECDHE_ECDSA:
components.add("ECDHE");
components.add("ECDSA");
components.add("ECDHE_ECDSA");
break;
case K_ECDHE_RSA:
components.add("ECDHE");
components.add("RSA");
components.add("ECDHE_RSA");
break;
case K_ECDH_ANON:
if (!onlyX509) {
components.add("ECDH");
components.add("ANON");
components.add("ECDH_ANON");
}
break;
default:
if (ClientKeyExchangeService.find(keyExchange.name) != null) {
if (!onlyX509) {
components.add(keyExchange.name);
}
}
// otherwise ignore
}
return components;
}
private Set<String> decomposes(CipherSuite.BulkCipher bulkCipher) {
Set<String> components = new HashSet<>();
if (bulkCipher.transformation != null) {
components.addAll(super.decompose(bulkCipher.transformation));
}
switch (bulkCipher) {
case B_NULL:
components.add("C_NULL");
break;
case B_RC2_40:
components.add("RC2_CBC_40");
break;
case B_RC4_40:
components.add("RC4_40");
break;
case B_RC4_128:
components.add("RC4_128");
break;
case B_DES_40:
components.add("DES40_CBC");
components.add("DES_CBC_40");
break;
case B_DES:
components.add("DES_CBC");
break;
case B_3DES:
components.add("3DES_EDE_CBC");
break;
case B_AES_128:
components.add("AES_128_CBC");
break;
case B_AES_256:
components.add("AES_256_CBC");
break;
case B_AES_128_GCM:
components.add("AES_128_GCM");
break;
case B_AES_256_GCM:
components.add("AES_256_GCM");
break;
}
return components;
}
private Set<String> decomposes(CipherSuite.MacAlg macAlg,
BulkCipher cipher) {
Set<String> components = new HashSet<>();
if (macAlg == CipherSuite.MacAlg.M_NULL
&& cipher.cipherType != CipherType.AEAD_CIPHER) {
components.add("M_NULL");
} else if (macAlg == CipherSuite.MacAlg.M_MD5) {
components.add("MD5");
components.add("HmacMD5");
} else if (macAlg == CipherSuite.MacAlg.M_SHA) {
components.add("SHA1");
components.add("SHA-1");
components.add("HmacSHA1");
} else if (macAlg == CipherSuite.MacAlg.M_SHA256) {
components.add("SHA256");
components.add("SHA-256");
components.add("HmacSHA256");
} else if (macAlg == CipherSuite.MacAlg.M_SHA384) {
components.add("SHA384");
components.add("SHA-384");
components.add("HmacSHA384");
}
return components;
}
private Set<String> decompose(KeyExchange keyExchange, BulkCipher cipher,
MacAlg macAlg) {
Set<String> components = new HashSet<>();
if (keyExchange != null) {
components.addAll(decomposes(keyExchange));
}
if (onlyX509) {
// Certification path algorithm constraints do not apply
// to cipher and macAlg.
return components;
}
if (cipher != null) {
components.addAll(decomposes(cipher));
}
if (macAlg != null) {
components.addAll(decomposes(macAlg, cipher));
}
return components;
}
@Override
public Set<String> decompose(String algorithm) {
if (algorithm.startsWith("SSL_") || algorithm.startsWith("TLS_")) {
CipherSuite cipherSuite = null;
try {
cipherSuite = CipherSuite.valueOf(algorithm);
} catch (IllegalArgumentException iae) {
// ignore: unknown or unsupported ciphersuite
}
if (cipherSuite != null) {
return decompose(cipherSuite.keyExchange, cipherSuite.cipher,
cipherSuite.macAlg);
}
}
return super.decompose(algorithm);
}
}