JDK8的JCE是不支持读取PEM文件的。需要使用bouncycastle。
项目需求，使用SHA1WithRSA算法，对接口数据做签名。
代码如下：
@Service
class SignService {
private static Logger LOG = LoggerFactory.getLogger(SignService.class);
@Autowired
private Config config;
private Signature signature;
@PostConstruct
private void init() {
try {
PKCS8EncodedKeySpec priKeySpec = new PKCS8EncodedKeySpec(
getDecoder().decode(config.getPrivateKey().getBytes(ISO_8859_1)));
KeyFactory factory = KeyFactory.getInstance("RSA");
PrivateKey privateKey = factory.generatePrivate(priKeySpec);
signature = Signature.getInstance("SHA1WithRSA");
signature.initSign(privateKey);
} catch (NoSuchAlgorithmException |
/*InvalidAlgorithmParameterException |*/
InvalidKeySpecException |
InvalidKeyException ex) {
LOG.warn("RSA init error: {}.", ex);
}
}
String signAndEncode(String source) {
if (Objects.isNull(source)) {
return null;
} else {
return sign(source)
.map(this::encode)
.orElse("");
}
}
private String encode(byte[] source) {
return getEncoder()
.encodeToString(source);
}
private synchronized Optional<byte[]> sign(String source) {
try {
signature.update(source.getBytes(ISO_8859_1));
return Optional.of(signature.sign());
} catch (SignatureException e) {
LOG.warn("SHA1WithRSA {} error: {}.", source, e);
return Optional.empty();
}
}
}
单元测试，验证签名是否正确。先初始化Signature：
private Signature signature;
@Before
public void init() {
try {
byte[] key = Files.readAllBytes(Paths.get("/home/ls", "ras_public_key.pem"));
Security.addProvider(new BouncyCastleProvider());
final PemObject pemObject;
try (PemReader pemReader = new PemReader(new InputStreamReader(
new ByteArrayInputStream(key)))) {
pemObject = pemReader.readPemObject();
}
X509EncodedKeySpec pubKeySpec = new X509EncodedKeySpec(pemObject.getContent());
KeyFactory factory = KeyFactory.getInstance("RSA");
PublicKey publicKey = factory.generatePublic(pubKeySpec);
signature = Signature.getInstance("SHA1WithRSA");
signature.initVerify(publicKey);
} catch (Exception e) {
e.printStackTrace();
}
}
验证方法
private boolean verify(String source, String sign) {
byte[] data = getDecoder().decode(sign);
try {
signature.update(source.getBytes());
return signature.verify(data);
} catch (SignatureException e) {
e.printStackTrace();
return false;
}
}
测试
String source = service.signature(request); String sign = signService.signAndEncode(source); System.out.println(sign); assertTrue(verify(source, sign));
证明，内容没有被篡改。
其中，ras_public_key.pem文件由openSSL生成。
ls@LS-8500:~$ openssl genrsa -out rsa_private_key.pem 1024 Generating RSA private key, 1024 bit long modulus (2 primes) ...+++++ ...............+++++ e is 65537 (0x010001) ls@LS-8500:~$ openssl pkcs8 -topk8 -inform PEM -in rsa_private_key.pem -outform PEM -nocrypt -----BEGIN P<p style="color:transparent">本文来源gao!daima.com搞$代!码网</p>RIVATE KEY----- MIICeQIBADANBgkqhkiG9w0BAQEFAASCAmMwggJfAgEAAoGBAOk4nqif4LtwfePZ IeGgUc5XYbWk8FpT6UEgO/43i0uprf2RXs3j9eDjOyRwkW2iMCF6S3bNxYuiyJv4 eNc+8w87PJ9bOMRq9WH+ISWIfnPu2x6A1oNOeNkAL7v3ztmpcAn2bNMJ5VscSKp8 S1U02LbHpOErPjvnEul9a/e8xb7TAgMBAAECgYEAvpMeyuoCKQiORo6aqhVoY7Vx yY2jPhyNYUNm4qAeulBINgkBMDtUI1VrcaZun+jFbcXSPp19DFKTnSgYDsOItt04 VLRSZm5yU1EfL21ZvbxIQjjSMv4BxndjdfdoGh5Gve0p1vqtnXtMivkNNI/HdCrx R2CpcGNo4Uqg+zgvwzECQQD1yULuH1sMTEGqLHZaBXVVt1ny+oF+3CnDz2ZdQTWj SLFfBSKplCL8TuEakauUiYf6BVtOjrpzKHRs7hDuZLW5AkEA8umwPbO09ijQdg5e /nkEnJnG5C4krXZuIcsYnf1wrBCLAoOImgDSvVzRrXHMGNvvP0D3gTIxwZSNPt57 1OFe6wJBAJmcOm9WO3IZKqTvetxSMv3qRJY+B7bAZH3TXleEDMDLCsenDv3K7n6f 0cHoLsL7nXcd5+3V+CNGslTuCLjlSkkCQQCM1fqNu5xmwAElAW4IIkgPN4U+FJbF T43I4ATUzPU/fZPrEDHqACIvEhqrcfgATbuns9YMPPrmHmfKFJo9MbGjAkEAzmbW IsDQP4S8TJVd6PvyNZgNrTZvtlMT8/v4MytaEErrljhAR/YLKLcWFxLmQNAL9g4M SsHT8KunE5YrBmkXkg== -----END PRIVATE KEY----- ls@LS-8500:~$ openssl rsa -in rsa_private_key.pem -pubout -out ras_public_key.pem writing RSA key
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转载请注明原文链接：Java读取OpenSSL生成的PEM公钥文件操作
转载请注明原文链接：Java读取OpenSSL生成的PEM公钥文件操作
