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lcguedes · 4261 days ago · link · · parent · post: A simple hexadecimal "bignum" library, in C.

Thank you for your decrypt, but I think it is not going to work. You need something like:

  ////////////////////////////////////////////////////////////////////////////
  //
  void rsaDecrypt( hex_bignum_t *ciphertext_ptr, hex_bignum_t *plaintext_ptr, rsaSecKey_t *privkey_ptr )
  {
     HB_modexp( ciphertext_ptr, &(privkey_ptr->d), &(privkey_ptr->n), plaintext_ptr );
  }

where, (d * e) % ((p-1)*(q-1)) = 1, p*q = n.

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