org.openeuler.sun.security.ssl.SSLSecretDerivation Maven / Gradle / Ivy
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package org.openeuler.sun.security.ssl;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.security.GeneralSecurityException;
import java.security.spec.AlgorithmParameterSpec;
import javax.crypto.SecretKey;
import javax.net.ssl.SSLHandshakeException;
import org.openeuler.sun.security.ssl.CipherSuite.HashAlg;
final class SSLSecretDerivation implements SSLKeyDerivation {
private static final byte[] sha256EmptyDigest = new byte[] {
(byte)0xE3, (byte)0xB0, (byte)0xC4, (byte)0x42,
(byte)0x98, (byte)0xFC, (byte)0x1C, (byte)0x14,
(byte)0x9A, (byte)0xFB, (byte)0xF4, (byte)0xC8,
(byte)0x99, (byte)0x6F, (byte)0xB9, (byte)0x24,
(byte)0x27, (byte)0xAE, (byte)0x41, (byte)0xE4,
(byte)0x64, (byte)0x9B, (byte)0x93, (byte)0x4C,
(byte)0xA4, (byte)0x95, (byte)0x99, (byte)0x1B,
(byte)0x78, (byte)0x52, (byte)0xB8, (byte)0x55
};
private static final byte[] sha384EmptyDigest = new byte[] {
(byte)0x38, (byte)0xB0, (byte)0x60, (byte)0xA7,
(byte)0x51, (byte)0xAC, (byte)0x96, (byte)0x38,
(byte)0x4C, (byte)0xD9, (byte)0x32, (byte)0x7E,
(byte)0xB1, (byte)0xB1, (byte)0xE3, (byte)0x6A,
(byte)0x21, (byte)0xFD, (byte)0xB7, (byte)0x11,
(byte)0x14, (byte)0xBE, (byte)0x07, (byte)0x43,
(byte)0x4C, (byte)0x0C, (byte)0xC7, (byte)0xBF,
(byte)0x63, (byte)0xF6, (byte)0xE1, (byte)0xDA,
(byte)0x27, (byte)0x4E, (byte)0xDE, (byte)0xBF,
(byte)0xE7, (byte)0x6F, (byte)0x65, (byte)0xFB,
(byte)0xD5, (byte)0x1A, (byte)0xD2, (byte)0xF1,
(byte)0x48, (byte)0x98, (byte)0xB9, (byte)0x5B
};
private final HandshakeContext context;
private final String hkdfAlg;
private final HashAlg hashAlg;
private final SecretKey secret;
private final byte[] transcriptHash; // handshake messages transcript hash
SSLSecretDerivation(
HandshakeContext context, SecretKey secret) {
this.context = context;
this.secret = secret;
this.hashAlg = context.negotiatedCipherSuite.hashAlg;
this.hkdfAlg =
"HKDF-Expand/Hmac" + hashAlg.name.replace("-", "");
context.handshakeHash.update();
this.transcriptHash = context.handshakeHash.digest();
}
SSLSecretDerivation forContext(HandshakeContext context) {
return new SSLSecretDerivation(context, secret);
}
@Override
public SecretKey deriveKey(String algorithm,
AlgorithmParameterSpec params) throws IOException {
SecretSchedule ks = SecretSchedule.valueOf(algorithm);
try {
byte[] expandContext;
if (ks == SecretSchedule.TlsSaltSecret) {
if (hashAlg == HashAlg.H_SHA256) {
expandContext = sha256EmptyDigest;
} else if (hashAlg == HashAlg.H_SHA384) {
expandContext = sha384EmptyDigest;
} else {
// unlikely, but please update if more hash algorithm
// get supported in the future.
throw new SSLHandshakeException(
"Unexpected unsupported hash algorithm: " +
algorithm);
}
} else {
expandContext = transcriptHash;
}
byte[] hkdfInfo = createHkdfInfo(ks.label,
expandContext, hashAlg.hashLength);
HKDF hkdf = new HKDF(hashAlg.name);
return hkdf.expand(secret, hkdfInfo, hashAlg.hashLength, algorithm);
} catch (GeneralSecurityException gse) {
throw (SSLHandshakeException) new SSLHandshakeException(
"Could not generate secret").initCause(gse);
}
}
public static byte[] createHkdfInfo(
byte[] label, byte[] context, int length) {
byte[] info = new byte[4 + label.length + context.length];
ByteBuffer m = ByteBuffer.wrap(info);
try {
Record.putInt16(m, length);
Record.putBytes8(m, label);
Record.putBytes8(m, context);
} catch (IOException ioe) {
// unlikely
throw new RuntimeException("Unexpected exception", ioe);
}
return info;
}
private enum SecretSchedule {
// Note that we use enum name as the key/secret name.
TlsSaltSecret ("derived"),
TlsExtBinderKey ("ext binder"),
TlsResBinderKey ("res binder"),
TlsClientEarlyTrafficSecret ("c e traffic"),
TlsEarlyExporterMasterSecret ("e exp master"),
TlsClientHandshakeTrafficSecret ("c hs traffic"),
TlsServerHandshakeTrafficSecret ("s hs traffic"),
TlsClientAppTrafficSecret ("c ap traffic"),
TlsServerAppTrafficSecret ("s ap traffic"),
TlsExporterMasterSecret ("exp master"),
TlsResumptionMasterSecret ("res master");
private final byte[] label;
private SecretSchedule(String label) {
this.label = ("tls13 " + label).getBytes();
}
}
}
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