SecurityTests/cspxutils/ccCtxSize/ccCtxSize.c

   1 /*
   2  * measure and report min context sizes for all CCCryptor ops and algorithms.
   3  */
   4
   5 #include <string.h>
   6 #include <stdlib.h>
   7 #include <stdio.h>
   8 #include <CommonCrypto/CommonCryptor.h>
   9 #include <CoreServices/../Frameworks/CarbonCore.framework/Headers/MacErrors.h>
  10
  11 static void report(
  12         const char *name,
  13         CCOperation op,
  14         CCAlgorithm alg,
  15         size_t definedSize)
  16 {
  17         char key[4];
  18         size_t cryptorLength = 0;
  19         CCCryptorStatus crtn;
  20         CCCryptorRef cryptorRef;
  21         char buf[1];
  22
  23         crtn = CCCryptorCreateFromData(op, alg, 0, key, 4, NULL,
  24                 buf, 1, &cryptorRef, &cryptorLength);
  25         switch(crtn) {
  26                 case kCCSuccess:
  27                         printf("***Unuexpected success on CCCryptorCreate()\n");
  28                         return;
  29                 case kCCBufferTooSmall:
  30                         break;
  31                 default:
  32                         printf("***Unexpected result on CCCryptorCreate: expect %d got %d\n",
  33                                 (int)kCCBufferTooSmall, (int)crtn);
  34                         return;
  35         }
  36         printf("%s : %lu bytes\n", name, (unsigned long)cryptorLength);
  37         if(definedSize < cryptorLength) {
  38                 printf("***Defined context size (%u) is less than reported!\n",
  39                         (unsigned)definedSize);
  40         }
  41 }
  42
  43 int main(int argc, char **argv)
  44 {
  45         report("kCCAlgorithmAES128  ", kCCEncrypt, kCCAlgorithmAES128,  kCCContextSizeAES128);
  46         report("kCCAlgorithmDES     ", kCCEncrypt, kCCAlgorithmDES,             kCCContextSizeDES);
  47         report("kCCAlgorithm3DES    ", kCCEncrypt, kCCAlgorithm3DES,    kCCContextSize3DES);
  48         report("kCCAlgorithmCAST    ", kCCEncrypt, kCCAlgorithmCAST,    kCCContextSizeCAST);
  49         report("kCCAlgorithmRC4     ", kCCEncrypt, kCCAlgorithmRC4,             kCCContextSizeRC4);
  50         return 0;
  51 }
  52
  53 /*
  54
  55 sizeof(CCCryptor) = 24 including the spiCtx[] array
  56 sizeof(struct _CCCryptContext) = 60 including algCtx[]
  57 sizeof(DES_key_schedule) = 128
  58 sizeof(DES3_Schedule) = 384
  59 sizeof(GAesKey) = 516
  60 sizeof(_ccHmacContext) = 180
  61
  62 */