src/RsaCrt.h

   1 #ifndef RSACRT_H
   2 #define RSACRT_H
   3
   4 #include <utility>
   5 #include <exception>
   6
   7 #include <gmpxx.h>
   8
   9 #include "Rsa.h"
  10
  11 class RsaCrt
  12 {
  13 public:
  14    struct KeyPriv {
  15       mpz_class p;
  16       mpz_class q;
  17       mpz_class dp;
  18       mpz_class dq;
  19       mpz_class qInv;
  20    };
  21
  22    /**
  23     * Generate a pair of keys (public, private).
  24     */
  25    static std::pair<Rsa::KeyPub, KeyPriv> generateRSAKeys(uint exponent, uint keySizeBits);
  26
  27    /**
  28     * m must not be greater or equal than kPriv.n.
  29     * @param m the message to sign. No padding is used.
  30     */
  31    static mpz_class sign(const mpz_class& m, const KeyPriv& kPriv);
  32
  33    /**
  34     * Sp is altered by flipping its 42nd bit.
  35     * @param m the message to sign. No padding is used.
  36     */
  37    static mpz_class signWithFaultySp(const mpz_class& m, const KeyPriv& kPriv);
  38
  39 private:
  40    static mpz_class sign(const mpz_class& m, const KeyPriv& kPriv, bool withError);
  41 };
  42
  43 #endif