Một tùy chọn là sử dụng PEMParser của bouncycastle :
Lớp phân tích cú pháp các luồng được mã hóa OpenSSL PEM chứa chứng chỉ X509, khóa được mã hóa PKCS8 và đối tượng PKCS7.
Trong trường hợp các đối tượng PKCS7, trình đọc sẽ trả về một đối tượng CMS ContentInfo. Các khóa công khai sẽ được trả lại cũng như các đối tượng SubjectPublicKeyInfo đã được tạo thành, các khóa riêng sẽ được trả lại cũng như các đối tượng PrivateKeyInfo đã được tạo thành. Trong trường hợp khóa cá nhân, PEMKeyPair thường sẽ được trả về nếu mã hóa chứa cả định nghĩa khóa riêng tư và khóa công khai. Các yêu cầu CRL, Chứng chỉ, PKCS # 10 và Chứng chỉ thuộc tính sẽ tạo ra loại chủ sở hữu BC thích hợp.
Dưới đây là một ví dụ về việc sử dụng mã kiểm tra Trình phân tích cú pháp :
package org.bouncycastle.openssl.test;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Reader;
import java.math.BigInteger;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.PrivateKey;
import java.security.PublicKey;
import java.security.SecureRandom;
import java.security.Security;
import java.security.Signature;
import java.security.interfaces.DSAPrivateKey;
import java.security.interfaces.RSAPrivateCrtKey;
import java.security.interfaces.RSAPrivateKey;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.cms.CMSObjectIdentifiers;
import org.bouncycastle.asn1.cms.ContentInfo;
import org.bouncycastle.asn1.pkcs.PrivateKeyInfo;
import org.bouncycastle.asn1.x509.SubjectPublicKeyInfo;
import org.bouncycastle.asn1.x9.ECNamedCurveTable;
import org.bouncycastle.asn1.x9.X9ECParameters;
import org.bouncycastle.cert.X509CertificateHolder;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.openssl.PEMDecryptorProvider;
import org.bouncycastle.openssl.PEMEncryptedKeyPair;
import org.bouncycastle.openssl.PEMKeyPair;
import org.bouncycastle.openssl.PEMParser;
import org.bouncycastle.openssl.PEMWriter;
import org.bouncycastle.openssl.PasswordFinder;
import org.bouncycastle.openssl.jcajce.JcaPEMKeyConverter;
import org.bouncycastle.openssl.jcajce.JceOpenSSLPKCS8DecryptorProviderBuilder;
import org.bouncycastle.openssl.jcajce.JcePEMDecryptorProviderBuilder;
import org.bouncycastle.operator.InputDecryptorProvider;
import org.bouncycastle.pkcs.PKCS8EncryptedPrivateKeyInfo;
import org.bouncycastle.util.test.SimpleTest;
public class ParserTest
extends SimpleTest
{
private static class Password
implements PasswordFinder
{
char[] password;
Password(
char[] word)
{
this.password = word;
}
public char[] getPassword()
{
return password;
}
}
public String getName()
{
return "PEMParserTest";
}
private PEMParser openPEMResource(
String fileName)
{
InputStream res = this.getClass().getResourceAsStream(fileName);
Reader fRd = new BufferedReader(new InputStreamReader(res));
return new PEMParser(fRd);
}
public void performTest()
throws Exception
{
PEMParser pemRd = openPEMResource("test.pem");
Object o;
PEMKeyPair pemPair;
KeyPair pair;
while ((o = pemRd.readObject()) != null)
{
if (o instanceof KeyPair)
{
}
else
{
}
}
pemRd = openPEMResource("extratest.pem");
while ((o = pemRd.readObject()) != null)
{
if (!(o instanceof X509CertificateHolder))
{
fail("wrong object found");
}
}
pemRd = openPEMResource("pkcs7.pem");
ContentInfo d = (ContentInfo)pemRd.readObject();
if (!d.getContentType().equals(CMSObjectIdentifiers.envelopedData))
{
fail("failed envelopedData check");
}
pemRd = openPEMResource("eckey.pem");
ASN1ObjectIdentifier ecOID = (ASN1ObjectIdentifier)pemRd.readObject();
X9ECParameters ecSpec = ECNamedCurveTable.getByOID(ecOID);
if (ecSpec == null)
{
fail("ecSpec not found for named curve");
}
pemPair = (PEMKeyPair)pemRd.readObject();
pair = new JcaPEMKeyConverter().setProvider("BC").getKeyPair(pemPair);
Signature sgr = Signature.getInstance("ECDSA", "BC");
sgr.initSign(pair.getPrivate());
byte[] message = new byte[] { (byte)'a', (byte)'b', (byte)'c' };
sgr.update(message);
byte[] sigBytes = sgr.sign();
sgr.initVerify(pair.getPublic());
sgr.update(message);
if (!sgr.verify(sigBytes))
{
fail("EC verification failed");
}
if (!pair.getPublic().getAlgorithm().equals("ECDSA"))
{
fail("wrong algorithm name on public got: " + pair.getPublic().getAlgorithm());
}
if (!pair.getPrivate().getAlgorithm().equals("ECDSA"))
{
fail("wrong algorithm name on private");
}
pemRd = openPEMResource("ecexpparam.pem");
ecSpec = (X9ECParameters)pemRd.readObject();
pemPair = (PEMKeyPair)pemRd.readObject();
pair = new JcaPEMKeyConverter().setProvider("BC").getKeyPair(pemPair);
sgr = Signature.getInstance("ECDSA", "BC");
sgr.initSign(pair.getPrivate());
message = new byte[] { (byte)'a', (byte)'b', (byte)'c' };
sgr.update(message);
sigBytes = sgr.sign();
sgr.initVerify(pair.getPublic());
sgr.update(message);
if (!sgr.verify(sigBytes))
{
fail("EC verification failed");
}
if (!pair.getPublic().getAlgorithm().equals("ECDSA"))
{
fail("wrong algorithm name on public got: " + pair.getPublic().getAlgorithm());
}
if (!pair.getPrivate().getAlgorithm().equals("ECDSA"))
{
fail("wrong algorithm name on private");
}
KeyPairGenerator kpGen = KeyPairGenerator.getInstance("RSA", "BC");
pair = kpGen.generateKeyPair();
keyPairTest("RSA", pair);
kpGen = KeyPairGenerator.getInstance("DSA", "BC");
kpGen.initialize(512, new SecureRandom());
pair = kpGen.generateKeyPair();
keyPairTest("DSA", pair);
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
PEMWriter pWrt = new PEMWriter(new OutputStreamWriter(bOut));
pWrt.writeObject(d);
pWrt.close();
pemRd = new PEMParser(new InputStreamReader(new ByteArrayInputStream(bOut.toByteArray())));
d = (ContentInfo)pemRd.readObject();
if (!d.getContentType().equals(CMSObjectIdentifiers.envelopedData))
{
fail("failed envelopedData recode check");
}
doOpenSslDsaTest("unencrypted");
doOpenSslRsaTest("unencrypted");
doOpenSslTests("aes128");
doOpenSslTests("aes192");
doOpenSslTests("aes256");
doOpenSslTests("blowfish");
doOpenSslTests("des1");
doOpenSslTests("des2");
doOpenSslTests("des3");
doOpenSslTests("rc2_128");
doOpenSslDsaTest("rc2_40_cbc");
doOpenSslRsaTest("rc2_40_cbc");
doOpenSslDsaTest("rc2_64_cbc");
doOpenSslRsaTest("rc2_64_cbc");
doDudPasswordTest("7fd98", 0, "corrupted stream - out of bounds length found");
doDudPasswordTest("ef677", 1, "corrupted stream - out of bounds length found");
doDudPasswordTest("800ce", 2, "unknown tag 26 encountered");
doDudPasswordTest("b6cd8", 3, "DEF length 81 object truncated by 56");
doDudPasswordTest("28ce09", 4, "DEF length 110 object truncated by 28");
doDudPasswordTest("2ac3b9", 5, "DER length more than 4 bytes: 11");
doDudPasswordTest("2cba96", 6, "DEF length 100 object truncated by 35");
doDudPasswordTest("2e3354", 7, "DEF length 42 object truncated by 9");
doDudPasswordTest("2f4142", 8, "DER length more than 4 bytes: 14");
doDudPasswordTest("2fe9bb", 9, "DER length more than 4 bytes: 65");
doDudPasswordTest("3ee7a8", 10, "DER length more than 4 bytes: 57");
doDudPasswordTest("41af75", 11, "unknown tag 16 encountered");
doDudPasswordTest("1704a5", 12, "corrupted stream detected");
doDudPasswordTest("1c5822", 13, "unknown object in getInstance: org.bouncycastle.asn1.DERUTF8String");
doDudPasswordTest("5a3d16", 14, "corrupted stream detected");
doDudPasswordTest("8d0c97", 15, "corrupted stream detected");
doDudPasswordTest("bc0daf", 16, "corrupted stream detected");
doDudPasswordTest("aaf9c4d",17, "corrupted stream - out of bounds length found");
doNoPasswordTest();
InputDecryptorProvider pkcs8Prov = new JceOpenSSLPKCS8DecryptorProviderBuilder().build("password".toCharArray());
pemRd = openPEMResource("enckey.pem");
PKCS8EncryptedPrivateKeyInfo encPrivKeyInfo = (PKCS8EncryptedPrivateKeyInfo)pemRd.readObject();
JcaPEMKeyConverter converter = new JcaPEMKeyConverter().setProvider("BC");
RSAPrivateCrtKey privKey = (RSAPrivateCrtKey)converter.getPrivateKey(encPrivKeyInfo.decryptPrivateKeyInfo(pkcs8Prov));
if (!privKey.getPublicExponent().equals(new BigInteger("10001", 16)))
{
fail("decryption of private key data check failed");
}
pemRd = openPEMResource("pkcs8test.pem");
Object privInfo;
while ((privInfo = pemRd.readObject()) != null)
{
if (privInfo instanceof PrivateKeyInfo)
{
privKey = (RSAPrivateCrtKey)converter.getPrivateKey(PrivateKeyInfo.getInstance(privInfo));
}
else
{
privKey = (RSAPrivateCrtKey)converter.getPrivateKey(((PKCS8EncryptedPrivateKeyInfo)privInfo).decryptPrivateKeyInfo(pkcs8Prov));
}
if (!privKey.getPublicExponent().equals(new BigInteger("10001", 16)))
{
fail("decryption of private key data check failed");
}
}
}
private void keyPairTest(
String name,
KeyPair pair)
throws IOException
{
PEMParser pemRd;
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
PEMWriter pWrt = new PEMWriter(new OutputStreamWriter(bOut));
pWrt.writeObject(pair.getPublic());
pWrt.close();
pemRd = new PEMParser(new InputStreamReader(new ByteArrayInputStream(bOut.toByteArray())));
SubjectPublicKeyInfo pub = SubjectPublicKeyInfo.getInstance(pemRd.readObject());
JcaPEMKeyConverter converter = new JcaPEMKeyConverter().setProvider("BC");
PublicKey k = converter.getPublicKey(pub);
if (!k.equals(pair.getPublic()))
{
fail("Failed public key read: " + name);
}
bOut = new ByteArrayOutputStream();
pWrt = new PEMWriter(new OutputStreamWriter(bOut));
pWrt.writeObject(pair.getPrivate());
pWrt.close();
pemRd = new PEMParser(new InputStreamReader(new ByteArrayInputStream(bOut.toByteArray())));
KeyPair kPair = converter.getKeyPair((PEMKeyPair)pemRd.readObject());
if (!kPair.getPrivate().equals(pair.getPrivate()))
{
fail("Failed private key read: " + name);
}
if (!kPair.getPublic().equals(pair.getPublic()))
{
fail("Failed private key public read: " + name);
}
}
private void doOpenSslTests(
String baseName)
throws IOException
{
doOpenSslDsaModesTest(baseName);
doOpenSslRsaModesTest(baseName);
}
private void doOpenSslDsaModesTest(
String baseName)
throws IOException
{
doOpenSslDsaTest(baseName + "_cbc");
doOpenSslDsaTest(baseName + "_cfb");
doOpenSslDsaTest(baseName + "_ecb");
doOpenSslDsaTest(baseName + "_ofb");
}
private void doOpenSslRsaModesTest(
String baseName)
throws IOException
{
doOpenSslRsaTest(baseName + "_cbc");
doOpenSslRsaTest(baseName + "_cfb");
doOpenSslRsaTest(baseName + "_ecb");
doOpenSslRsaTest(baseName + "_ofb");
}
private void doOpenSslDsaTest(
String name)
throws IOException
{
String fileName = "dsa/openssl_dsa_" + name + ".pem";
doOpenSslTestFile(fileName, DSAPrivateKey.class);
}
private void doOpenSslRsaTest(
String name)
throws IOException
{
String fileName = "rsa/openssl_rsa_" + name + ".pem";
doOpenSslTestFile(fileName, RSAPrivateKey.class);
}
private void doOpenSslTestFile(
String fileName,
Class expectedPrivKeyClass)
throws IOException
{
JcaPEMKeyConverter converter = new JcaPEMKeyConverter().setProvider("BC");
PEMDecryptorProvider decProv = new JcePEMDecryptorProviderBuilder().setProvider("BC").build("changeit".toCharArray());
PEMParser pr = openPEMResource("data/" + fileName);
Object o = pr.readObject();
if (o == null || !((o instanceof PEMKeyPair) || (o instanceof PEMEncryptedKeyPair)))
{
fail("Didn't find OpenSSL key");
}
KeyPair kp = (o instanceof PEMEncryptedKeyPair) ?
converter.getKeyPair(((PEMEncryptedKeyPair)o).decryptKeyPair(decProv)) : converter.getKeyPair((PEMKeyPair)o);
PrivateKey privKey = kp.getPrivate();
if (!expectedPrivKeyClass.isInstance(privKey))
{
fail("Returned key not of correct type");
}
}
private void doDudPasswordTest(String password, int index, String message)
{
try
{
PEMDecryptorProvider decProv = new JcePEMDecryptorProviderBuilder().setProvider("BC").build(password.toCharArray());
PEMParser pemRd = openPEMResource("test.pem");
Object o;
while ((o = pemRd.readObject()) != null)
{
if (o instanceof PEMEncryptedKeyPair)
{
((PEMEncryptedKeyPair)o).decryptKeyPair(decProv);
}
}
fail("issue not detected: " + index);
}
catch (IOException e)
{
if (e.getCause() != null && !e.getCause().getMessage().endsWith(message))
{
fail("issue " + index + " exception thrown, but wrong message");
}
else if (e.getCause() == null && !e.getMessage().equals(message))
{
e.printStackTrace();
fail("issue " + index + " exception thrown, but wrong message");
}
}
}
private void doNoPasswordTest()
throws IOException
{
PEMDecryptorProvider decProv = new JcePEMDecryptorProviderBuilder().setProvider("BC").build("".toCharArray());
PEMParser pemRd = openPEMResource("smimenopw.pem");
Object o;
PrivateKeyInfo key = null;
while ((o = pemRd.readObject()) != null)
{
key = (PrivateKeyInfo)o;
}
if (key == null)
{
fail("private key not detected");
}
}
public static void main(
String[] args)
{
Security.addProvider(new BouncyCastleProvider());
runTest(new ParserTest());
}
}