1 package org
.argeo
.cms
.bc
;
3 import java
.io
.IOException
;
4 import java
.io
.InputStream
;
5 import java
.io
.OutputStream
;
7 import java
.math
.BigInteger
;
8 import java
.net
.InetAddress
;
9 import java
.nio
.file
.Files
;
10 import java
.nio
.file
.Path
;
11 import java
.security
.GeneralSecurityException
;
12 import java
.security
.KeyPair
;
13 import java
.security
.KeyPairGenerator
;
14 import java
.security
.KeyStore
;
15 import java
.security
.PrivateKey
;
16 import java
.security
.SecureRandom
;
17 import java
.security
.Security
;
18 import java
.security
.cert
.Certificate
;
19 import java
.security
.cert
.CertificateException
;
20 import java
.security
.cert
.X509Certificate
;
21 import java
.util
.Arrays
;
22 import java
.util
.Date
;
24 import javax
.security
.auth
.x500
.X500Principal
;
26 import org
.argeo
.api
.cms
.CmsLog
;
27 import org
.bouncycastle
.asn1
.pkcs
.PrivateKeyInfo
;
28 import org
.bouncycastle
.cert
.X509CertificateHolder
;
29 import org
.bouncycastle
.cert
.X509v3CertificateBuilder
;
30 import org
.bouncycastle
.cert
.jcajce
.JcaX509CertificateConverter
;
31 import org
.bouncycastle
.cert
.jcajce
.JcaX509v3CertificateBuilder
;
32 import org
.bouncycastle
.jce
.provider
.BouncyCastleProvider
;
33 import org
.bouncycastle
.openssl
.PEMParser
;
34 import org
.bouncycastle
.openssl
.jcajce
.JcaPEMKeyConverter
;
35 import org
.bouncycastle
.openssl
.jcajce
.JceOpenSSLPKCS8DecryptorProviderBuilder
;
36 import org
.bouncycastle
.operator
.ContentSigner
;
37 import org
.bouncycastle
.operator
.InputDecryptorProvider
;
38 import org
.bouncycastle
.operator
.OperatorCreationException
;
39 import org
.bouncycastle
.operator
.jcajce
.JcaContentSignerBuilder
;
40 import org
.bouncycastle
.pkcs
.PKCS8EncryptedPrivateKeyInfo
;
41 import org
.bouncycastle
.pkcs
.PKCSException
;
43 /** Utilities around the BouncyCastle crypto library. */
44 public class BcUtils
{
45 private final static CmsLog log
= CmsLog
.getLog(BcUtils
.class);
47 private final static String BC_SECURITY_PROVIDER
;
49 Security
.addProvider(new BouncyCastleProvider());
50 BC_SECURITY_PROVIDER
= "BC";
53 public static void createSelfSignedKeyStore(Path keyStorePath
, char[] keyStorePassword
, String keyStoreType
) {
54 // for (Provider provider : Security.getProviders())
55 // System.out.println(provider.getName());
56 // File keyStoreFile = keyStorePath.toFile();
57 char[] keyPwd
= Arrays
.copyOf(keyStorePassword
, keyStorePassword
.length
);
58 if (!Files
.exists(keyStorePath
)) {
60 Files
.createDirectories(keyStorePath
.getParent());
61 KeyStore keyStore
= getKeyStore(keyStorePath
, keyStorePassword
, keyStoreType
);
62 generateSelfSignedCertificate(keyStore
,
63 new X500Principal("CN=" + InetAddress
.getLocalHost().getHostName() + ",OU=UNSECURE,O=UNSECURE"),
65 saveKeyStore(keyStorePath
, keyStorePassword
, keyStore
);
66 if (log
.isDebugEnabled())
67 log
.debug("Created self-signed unsecure keystore " + keyStorePath
);
68 } catch (Exception e
) {
70 if (Files
.size(keyStorePath
) == 0)
71 Files
.delete(keyStorePath
);
72 } catch (IOException e1
) {
75 log
.error("Cannot create keystore " + keyStorePath
, e
);
78 throw new IllegalStateException("Keystore " + keyStorePath
+ " already exists");
82 public static X509Certificate
generateSelfSignedCertificate(KeyStore keyStore
, X500Principal x500Principal
,
83 int keySize
, char[] keyPassword
) {
85 KeyPairGenerator kpGen
= KeyPairGenerator
.getInstance("RSA", BC_SECURITY_PROVIDER
);
86 kpGen
.initialize(keySize
, new SecureRandom());
87 KeyPair pair
= kpGen
.generateKeyPair();
88 Date notBefore
= new Date(System
.currentTimeMillis() - 10000);
89 Date notAfter
= new Date(System
.currentTimeMillis() + 365 * 24L * 3600 * 1000);
90 BigInteger serial
= BigInteger
.valueOf(System
.currentTimeMillis());
91 X509v3CertificateBuilder certGen
= new JcaX509v3CertificateBuilder(x500Principal
, serial
, notBefore
,
92 notAfter
, x500Principal
, pair
.getPublic());
93 ContentSigner sigGen
= new JcaContentSignerBuilder("SHA256WithRSAEncryption")
94 .setProvider(BC_SECURITY_PROVIDER
).build(pair
.getPrivate());
95 X509Certificate cert
= new JcaX509CertificateConverter().setProvider(BC_SECURITY_PROVIDER
)
96 .getCertificate(certGen
.build(sigGen
));
97 cert
.checkValidity(new Date());
98 cert
.verify(cert
.getPublicKey());
100 keyStore
.setKeyEntry(x500Principal
.getName(), pair
.getPrivate(), keyPassword
, new Certificate
[] { cert
});
102 } catch (GeneralSecurityException
| OperatorCreationException e
) {
103 throw new RuntimeException("Cannot generate self-signed certificate", e
);
107 public static PrivateKey
loadPemPrivateKey(Reader reader
, char[] keyPassword
) {
108 try (PEMParser pemParser
= new PEMParser(reader
)) {
109 JcaPEMKeyConverter converter
= new JcaPEMKeyConverter().setProvider(BC_SECURITY_PROVIDER
);
110 Object object
= pemParser
.readObject();
111 PrivateKeyInfo privateKeyInfo
;
112 if (object
instanceof PKCS8EncryptedPrivateKeyInfo
) {
113 if (keyPassword
== null)
114 throw new IllegalArgumentException("A key password is required");
115 InputDecryptorProvider decProv
= new JceOpenSSLPKCS8DecryptorProviderBuilder().build(keyPassword
);
116 privateKeyInfo
= ((PKCS8EncryptedPrivateKeyInfo
) object
).decryptPrivateKeyInfo(decProv
);
117 } else if (object
instanceof PrivateKeyInfo
) {
118 privateKeyInfo
= (PrivateKeyInfo
) object
;
120 throw new IllegalArgumentException("Unsupported format for private key");
122 return converter
.getPrivateKey(privateKeyInfo
);
123 } catch (IOException
| OperatorCreationException
| PKCSException e
) {
124 throw new RuntimeException("Cannot read private key", e
);
128 public static X509Certificate
loadPemCertificate(Reader reader
) {
129 try (PEMParser pemParser
= new PEMParser(reader
)) {
130 X509CertificateHolder certHolder
= (X509CertificateHolder
) pemParser
.readObject();
131 X509Certificate cert
= new JcaX509CertificateConverter().setProvider(BC_SECURITY_PROVIDER
)
132 .getCertificate(certHolder
);
134 } catch (IOException
| CertificateException e
) {
135 throw new RuntimeException("Cannot read private key", e
);
139 private static KeyStore
getKeyStore(Path keyStoreFile
, char[] keyStorePassword
, String keyStoreType
) {
141 KeyStore store
= KeyStore
.getInstance(keyStoreType
, BC_SECURITY_PROVIDER
);
142 if (Files
.exists(keyStoreFile
)) {
143 try (InputStream fis
= Files
.newInputStream(keyStoreFile
)) {
144 store
.load(fis
, keyStorePassword
);
150 } catch (GeneralSecurityException
| IOException e
) {
151 throw new RuntimeException("Cannot load keystore " + keyStoreFile
, e
);
155 private static void saveKeyStore(Path keyStoreFile
, char[] keyStorePassword
, KeyStore keyStore
) {
157 try (OutputStream fis
= Files
.newOutputStream(keyStoreFile
)) {
158 keyStore
.store(fis
, keyStorePassword
);
160 } catch (GeneralSecurityException
| IOException e
) {
161 throw new RuntimeException("Cannot save keystore " + keyStoreFile
, e
);