Example usage for org.bouncycastle.math.ec ECPoint toString

Introduction

In this page you can find the example usage for org.bouncycastle.math.ec ECPoint toString.

Prototype

public String toString() 

Source Link

Usage

From source file:com.vvote.verifier.component.ComponentVerifier.java

License:Open Source License

/**
 * Verify that the base encrypted ids are actually the plaintext ids
 * encrypted with a fixed randomness value of 1
 * /* w  ww.jav a  2s.  c  o m*/
 * @return true if the plaintext ids and base encryped candidate ids match
 */
public boolean verifyBaseCandidateIds() {

    logger.info("Starting Verification of the base candidate ids");

    if (this.getDataStore().getPlaintextIds() == null || this.getDataStore().getBaseEncryptedIds() == null) {
        logger.error("Check that both the plaintext ids and base encrypted candidate ids are present");
        resultsLogger.error("Check that both the plaintext ids and base encrypted candidate ids are present");
        return false;
    }

    // check that the number of ids (plaintext/base encrypted) match
    if (this.getDataStore().getPlaintextIds().size() != this.getDataStore().getBaseEncryptedIds().size()) {
        logger.error("The size of the lists of plaintext ids and base encrypted candidate ids do not match");
        resultsLogger
                .error("The size of the lists of plaintext ids and base encrypted candidate ids do not match");
        return false;
    }

    final ECPoint publicKey = this.getDataStore().getPublicKey();

    ECPoint currentPlaintextId = null;
    ElGamalECPoint encryptedId = null;
    ElGamalECPoint currentBaseEncryptedId = null;

    // Encrypt each plaintext id with fixed randomness value of 1 and get a
    // candidate encrypted id to compare to the stored base encrypted
    // ciphers
    for (int i = 0; i < this.getDataStore().getPlaintextIds().size(); i++) {

        currentPlaintextId = this.getDataStore().getPlaintextIds().get(i);
        currentBaseEncryptedId = this.getDataStore().getBaseEncryptedIds().get(i);
        encryptedId = ECUtils.encrypt(currentPlaintextId, publicKey, BigInteger.ONE);

        // compare the two ElGamalECPoints
        if (!encryptedId.equals(currentBaseEncryptedId)) {
            logger.error(
                    "Plaintext ids and base candidate ids do not match at index: {}, (plaintext id: {}, base encrypted id: {})",
                    i, currentPlaintextId.toString(), currentBaseEncryptedId.toString());
            resultsLogger.error(
                    "Plaintext ids and base candidate ids do not match at index: {}, (plaintext id: {}, base encrypted id: {})",
                    i, currentPlaintextId.toString(), currentBaseEncryptedId.toString());
            return false;
        }
    }

    logger.debug("Successfully verified that the plaintext ids and base candidate ids match");
    resultsLogger.info("Successfully verified that the plaintext ids and base candidate ids match");

    return true;
}

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