drivers/rsa/rsa.h

   1 /**************************************************************************/
   2 /*!
   3     @file     rsa.h
   4     @author   Kyle Loudon
   5               modified: microBuilder.eu
   6     @date     4 January, 2010
   7     @version  1.0
   8
   9     Basic RSA-encryption using 64-bit math (32-bit keys).
  10
  11     Based on the examples from "Mastering Algorithms with C" by
  12     Kyle Loudon (O'Reilly, 1999).
  13 */
  14 /**************************************************************************/
  15
  16 #ifndef _RSA_H_
  17 #define _RSA_H_
  18
  19 #include "projectconfig.h"
  20
  21 /* In a secure implementation, huge_t should be at least 400 decimal digits, *
  22  * instead of the 20 provided by a 64-bit value.  This means that key values *
  23  * can be no longer than 10 digits in length in the current implementation.  */
  24 #if CFG_RSA_BITS == 64
  25   typedef uint64_t huge_t;
  26 #endif
  27 #if CFG_RSA_BITS == 32
  28   typedef uint32_t huge_t;
  29 #endif
  30
  31 /* Structure for RSA public keys. */
  32 typedef struct rsaPubKey_s
  33 {
  34   huge_t e;
  35   huge_t n;
  36 }
  37 rsaPubKey_t;
  38
  39 /* Define a structure for RSA private keys. */
  40 typedef struct rsaPriKey_s
  41 {
  42   huge_t d;
  43   huge_t n;
  44 }
  45 rsaPriKey_t;
  46
  47 void rsaTest();
  48 void rsaEncrypt(huge_t plaintext, huge_t *ciphertext, rsaPubKey_t pubkey);
  49 void rsaDecrypt(huge_t ciphertext, huge_t *plaintext, rsaPriKey_t prikey);
  50
  51 #endif