Beispiel #1
0
 /** Parse the key. Called by PKCS8Key. */
 protected void parseKeyBits() throws InvalidKeyException {
   try {
     DerInputStream in = new DerInputStream(key);
     DerValue derValue = in.getDerValue();
     if (derValue.tag != DerValue.tag_Sequence) {
       throw new IOException("Not a SEQUENCE");
     }
     DerInputStream data = derValue.data;
     int version = data.getInteger();
     if (version != 0) {
       throw new IOException("Version must be 0");
     }
     n = getBigInteger(data);
     e = getBigInteger(data);
     d = getBigInteger(data);
     p = getBigInteger(data);
     q = getBigInteger(data);
     pe = getBigInteger(data);
     qe = getBigInteger(data);
     coeff = getBigInteger(data);
     if (derValue.data.available() != 0) {
       throw new IOException("Extra data available");
     }
   } catch (IOException e) {
     throw new InvalidKeyException("Invalid RSA private key", e);
   }
 }
Beispiel #2
0
  /** Read a BigInteger from the DerInputStream. */
  static BigInteger getBigInteger(DerInputStream data) throws IOException {
    BigInteger b = data.getBigInteger();

    /*
     * Some implementations do not correctly encode ASN.1 INTEGER values
     * in 2's complement format, resulting in a negative integer when
     * decoded. Correct the error by converting it to a positive integer.
     *
     * See CR 6255949
     */
    if (b.signum() < 0) {
      b = new BigInteger(1, b.toByteArray());
    }
    return b;
  }