Package java.security.spec

Examples of java.security.spec.DSAPublicKeySpec

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     *             contain valid information
     */
    public static PublicKey getDSAKey(DSAKeyValue keyDescriptor, DSAParams dsaParams) throws KeyException {
        BigInteger yComponent = keyDescriptor.getY().getValueBigInt();

        DSAPublicKeySpec keySpec =
            new DSAPublicKeySpec(yComponent, dsaParams.getP(), dsaParams.getQ(), dsaParams.getG());
        return buildKey(keySpec, "DSA");
    }
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        KeyFactory factory;
        if (key instanceof DSAPrivateKey) {
            DSAPrivateKey dsaKey = (DSAPrivateKey) key;
            DSAParams keyParams = dsaKey.getParams();
            BigInteger y = keyParams.getQ().modPow(dsaKey.getX(), keyParams.getP());
            DSAPublicKeySpec pubKeySpec = new DSAPublicKeySpec(y, keyParams.getP(), keyParams.getQ(), keyParams.getG());

            try {
                factory = KeyFactory.getInstance("DSA");
                return factory.generatePublic(pubKeySpec);
            } catch (GeneralSecurityException e) {
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            BigInteger p = getMPInt();
            BigInteger q = getMPInt();
            BigInteger g = getMPInt();
            BigInteger y = getMPInt();
            KeyFactory keyFactory = SecurityUtils.getKeyFactory("DSA");
            key = keyFactory.generatePublic(new DSAPublicKeySpec(y, p, q, g));
        } else {
            throw new IllegalStateException("Unsupported algorithm: " + keyAlg);
        }
        return key;
    }
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      checkArgument("ssh-dss".equals(marker), "looking for marker ssh-dss but got %s", marker);
      BigInteger p = new BigInteger(readLengthFirst(stream));
      BigInteger q = new BigInteger(readLengthFirst(stream));
      BigInteger g = new BigInteger(readLengthFirst(stream));
      BigInteger y = new BigInteger(readLengthFirst(stream));
      return new DSAPublicKeySpec(y, p, q, g);
   }
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   /**
    * @param publicKeyOpenSSH RSA public key in OpenSSH format
    * @return fingerprint ex. {@code 2b:a9:62:95:5b:8b:1d:61:e0:92:f7:03:10:e9:db:d9}
    */
   public static String fingerprintPublicKey(String publicKeyOpenSSH) {
      DSAPublicKeySpec publicKeySpec = publicKeySpecFromOpenSSH(publicKeyOpenSSH);
      return fingerprint(publicKeySpec.getP(), publicKeySpec.getQ(), publicKeySpec.getG(), publicKeySpec.getY());
   }
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   }

   @Test
   public void testEncodeAsOpenSSH() throws IOException, InvalidKeySpecException, NoSuchAlgorithmException {
      String dsa = Strings2.toStringAndClose(getClass().getResourceAsStream("/ssh-dsa.txt"));
      DSAPublicKeySpec spec = DSAKeys.publicKeySpecFromOpenSSH(dsa);
      DSAPublicKey key = (DSAPublicKey) KeyFactory.getInstance("DSA").generatePublic(spec);

      assertEquals(DSAKeys.encodeAsOpenSSH(key), dsa);
   }
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         try {
            if ("ssh-rsa".equals(type)) {
               RSAPublicKeySpec spec = SshKeys.publicKeySpecFromOpenSSH(input);
               return KeyFactory.getInstance("RSA").generatePublic(spec);
            } else if ("ssh-dss".equals(type)) {
               DSAPublicKeySpec spec = DSAKeys.publicKeySpecFromOpenSSH(input);
               return KeyFactory.getInstance("DSA").generatePublic(spec);
            } else {
               throw new IllegalArgumentException("bad format, should be: [ssh-rsa|ssh-dss] AAAAB3...");
            }
         } catch (InvalidKeySpecException ex) {
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            DERInteger              x = (DERInteger)seq.getObjectAt(5);

            privSpec = new DSAPrivateKeySpec(
                        x.getValue(), p.getValue(),
                            q.getValue(), g.getValue());
            pubSpec = new DSAPublicKeySpec(
                        y.getValue(), p.getValue(),
                            q.getValue(), g.getValue());
        }

        KeyFactory          fact = KeyFactory.getInstance(type, provider);
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            DERInteger              x = (DERInteger)seq.getObjectAt(5);

            privSpec = new DSAPrivateKeySpec(
                        x.getValue(), p.getValue(),
                            q.getValue(), g.getValue());
            pubSpec = new DSAPublicKeySpec(
                        y.getValue(), p.getValue(),
                            q.getValue(), g.getValue());
        }

        KeyFactory          fact = KeyFactory.getInstance(type, provider);
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                    // still missing components, return
                    return value;
                }
            }
            // we now have all components. create the key.
            DSAPublicKeySpec spec = new DSAPublicKeySpec(vals[SPEC_Y], vals[SPEC_P], vals[SPEC_Q], vals[SPEC_G]);
            try {
                this.pubKey = (DSAPublicKey)KeyFactory.getInstance("DSA").generatePublic(spec);
            } catch (InvalidKeySpecException e) {
                throw newDSAError(getRuntime(), "invalid keyspec");
            } catch (NoSuchAlgorithmException e) {
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Related Classes of java.security.spec.DSAPublicKeySpec

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  • com.adito.security.pki.dsa.SshDssPublicKey
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