Examples with KeySpec java.security.spec.KeySpec used on opensource projects

Example 21 with KeySpec

use of java.security.spec.KeySpec in project j2objc by google.

the class SubjectPublicKeyInfo method getPublicKey.

/**
     * Returns the PublicKey corresponding to this SubjectPublicKeyInfo
     * instance.
     */
public PublicKey getPublicKey() {
    if (publicKey == null) {
        final byte[] encoded = getEncoded();
        final KeySpec keySpec = new X509EncodedKeySpec(encoded);
        /* Try using the algorithm name first. */
        final String algName = algorithmID.getAlgorithmName();
        publicKey = generateKeyForAlgorithm(keySpec, algName);
        /*
             * Fall back to using the algorithm OID if it's not the same as the
             * algorithm name.
             */
        final String algOid = algorithmID.getAlgorithm();
        if (publicKey == null && !algOid.equals(algName)) {
            publicKey = generateKeyForAlgorithm(keySpec, algOid);
        }
        /*
             * Encode this as an X.509 public key since we didn't have any
             * KeyFactory that could handle this algorithm name or OID. Perhaps
             * the thing that's using this can decode it.
             */
        if (publicKey == null) {
            publicKey = new X509PublicKey(algOid, encoded, subjectPublicKey);
        }
    }
    return publicKey;
}

Example 22 with KeySpec

use of java.security.spec.KeySpec in project bigbluebutton by bigbluebutton.

the class RSA_SHA1 method getPublicKeyFromPem.

private PublicKey getPublicKeyFromPem(String pem) throws GeneralSecurityException, IOException {
    InputStream stream = new ByteArrayInputStream(pem.getBytes("UTF-8"));
    PEMReader reader = new PEMReader(stream);
    byte[] bytes = reader.getDerBytes();
    PublicKey pubKey;
    if (PEMReader.PUBLIC_X509_MARKER.equals(reader.getBeginMarker())) {
        KeySpec keySpec = new X509EncodedKeySpec(bytes);
        KeyFactory fac = KeyFactory.getInstance("RSA");
        pubKey = fac.generatePublic(keySpec);
    } else if (PEMReader.CERTIFICATE_X509_MARKER.equals(reader.getBeginMarker())) {
        pubKey = getPublicKeyFromDerCert(bytes);
    } else {
        throw new IOException("Invalid PEM fileL: Unknown marker for " + " public key or cert " + reader.getBeginMarker());
    }
    return pubKey;
}

Example 23 with KeySpec

use of java.security.spec.KeySpec in project bigbluebutton by bigbluebutton.

the class RSA_SHA1 method getPrivateKeyFromPem.

private PrivateKey getPrivateKeyFromPem(String pem) throws GeneralSecurityException, IOException {
    InputStream stream = new ByteArrayInputStream(pem.getBytes("UTF-8"));
    PEMReader reader = new PEMReader(stream);
    byte[] bytes = reader.getDerBytes();
    KeySpec keySpec;
    if (PEMReader.PRIVATE_PKCS1_MARKER.equals(reader.getBeginMarker())) {
        keySpec = (new PKCS1EncodedKeySpec(bytes)).getKeySpec();
    } else if (PEMReader.PRIVATE_PKCS8_MARKER.equals(reader.getBeginMarker())) {
        keySpec = new PKCS8EncodedKeySpec(bytes);
    } else {
        throw new IOException("Invalid PEM file: Unknown marker " + "for private key " + reader.getBeginMarker());
    }
    KeyFactory fac = KeyFactory.getInstance("RSA");
    return fac.generatePrivate(keySpec);
}

Example 24 with KeySpec

use of java.security.spec.KeySpec in project pulsar by yahoo.

the class SecurityUtility method loadPrivateKeyFromPemFile.

public static PrivateKey loadPrivateKeyFromPemFile(String keyFilePath) throws KeyManagementException {
    PrivateKey privateKey = null;
    if (keyFilePath == null || keyFilePath.isEmpty()) {
        return privateKey;
    }
    try (BufferedReader reader = new BufferedReader(new FileReader(keyFilePath))) {
        StringBuilder sb = new StringBuilder();
        String previousLine = "";
        String currentLine = null;
        // Skip the first line (-----BEGIN RSA PRIVATE KEY-----)
        reader.readLine();
        while ((currentLine = reader.readLine()) != null) {
            sb.append(previousLine);
            previousLine = currentLine;
        }
        // Skip the last line (-----END RSA PRIVATE KEY-----)
        KeyFactory kf = KeyFactory.getInstance("RSA");
        KeySpec keySpec = new PKCS8EncodedKeySpec(Base64.getDecoder().decode(sb.toString()));
        privateKey = kf.generatePrivate(keySpec);
    } catch (GeneralSecurityException | IOException e) {
        throw new KeyManagementException("Private key loading error", e);
    }
    return privateKey;
}

Example 25 with KeySpec

use of java.security.spec.KeySpec in project hutool by looly.

the class SecureUtil method generateDESKey.

/**
 * 生成 {@link SecretKey}
 *
 * @param algorithm DES算法，包括DES、DESede等
 * @param key 密钥
 * @return {@link SecretKey}
 */
public static SecretKey generateDESKey(String algorithm, byte[] key) {
    if (StrUtil.isBlank(algorithm) || false == algorithm.startsWith("DES")) {
        throw new CryptoException("Algorithm [{}] is not a DES algorithm!");
    }
    SecretKey secretKey = null;
    if (null == key) {
        secretKey = generateKey(algorithm);
    } else {
        KeySpec keySpec;
        try {
            if (algorithm.startsWith("DESede")) {
                // DESede兼容
                keySpec = new DESedeKeySpec(key);
            } else {
                keySpec = new DESKeySpec(key);
            }
        } catch (InvalidKeyException e) {
            throw new CryptoException(e);
        }
        secretKey = generateKey(algorithm, keySpec);
    }
    return secretKey;
}