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briandmyers · 4268 days ago · link · · parent · post: A simple hexadecimal "bignum" library, in C.

{Edited to point out that there was a bug in here - see later discussion. I've fixed the bug.}

My bad - I meant to include it. Here 'tis :

  ////////////////////////////////////////////////////////////////////////////
  //
  void rsaDecrypt( hex_bignum_t *ciphertext_ptr, hex_bignum_t *plaintext_ptr, rsaKey_t *prikey_ptr )
  {
     modexp( plaintext_ptr, &(prikey_ptr->e), &(prikey_ptr->n), ciphertext_ptr );
  }

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