/*! \brief Input: cyphertext as matrix, private key, unimodular, inverse of private key, inverse of unimodular
* Output: Decrypted message as a matrix.
*
* Performs decryption on a message. This is what Alice does to Bob's encrypted message.
*/
gsl_matrix* decryptor(gsl_matrix *c, /*!< Cyphertext as a vector */
gsl_matrix *v, /*!< Private Key*/
gsl_matrix *u, /*!< Unimodular matrix */
gsl_matrix *vinv,/*!< Inverse of private key */
gsl_matrix *uinv) /*!< Inverse of Unimodular matrix */
{
gsl_matrix *decryp = gsl_matrix_alloc(1,SIZE);
gsl_matrix *m = gsl_matrix_alloc(1,SIZE); /*result is stored in here*/
/*Compute c*V^(-1)*/
gsl_linalg_matmult(c,vinv,decryp);
/*Round the elements of decryp*/
roundVector(decryp);
/*Compute decryp*U^(-1) = m*/
gsl_linalg_matmult(decryp,uinv,m);
roundVector(m);
gsl_matrix_free(decryp);
return m;
}
/*! \brief Input: cyphertext as matrices, public key, inverse of public key. Output: Decrypted message as a matrix.
*
* Attempts to decrypt the message only using the public key, used for testing the security of the encryption.
* Performs decryption on a message. This is what Eve does to Bob's encrypted message.
* This is a measure of the encryption strength, hence a property.
*/
gsl_matrix* baddecryptor( gsl_matrix *c, /*!< Cyphertext as a vector */
gsl_matrix *pub, /*!< Public Key */
gsl_matrix *pubinv) /*!< Inverse of Public Key*/
{
gsl_matrix *decryp = gsl_matrix_alloc(1,SIZE);
gsl_linalg_matmult(c,pubinv,decryp);
roundVector(decryp);
return decryp;
}
void ButtonComponent::render(const Eigen::Affine3f& parentTrans)
{
Eigen::Affine3f trans = roundMatrix(parentTrans * getTransform());
mBox.render(trans);
if(mTextCache)
{
Eigen::Vector3f centerOffset((mSize.x() - mTextCache->metrics.size.x()) / 2, (mSize.y() - mTextCache->metrics.size.y()) / 2, 0);
centerOffset = roundVector(centerOffset);
trans = trans.translate(centerOffset);
Renderer::setMatrix(trans);
mTextCache->setColor(getCurTextColor());
mFont->renderTextCache(mTextCache.get());
trans = trans.translate(-centerOffset);
}
renderChildren(trans);
}
