release/src/router/nettle/sha-example.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3
   4 #include <nettle/sha1.h>
   5
   6 #define BUF_SIZE 1000
   7
   8 static void
   9 display_hex(unsigned length, uint8_t *data)
  10 {
  11   unsigned i;
  12
  13   for (i = 0; i<length; i++)
  14     printf("%02x ", data[i]);
  15
  16   printf("\n");
  17 }
  18
  19 int
  20 main(int argc, char **argv)
  21 {
  22   struct sha1_ctx ctx;
  23   uint8_t buffer[BUF_SIZE];
  24   uint8_t digest[SHA1_DIGEST_SIZE];
  25
  26   sha1_init(&ctx);
  27   for (;;)
  28   {
  29     int done = fread(buffer, 1, sizeof(buffer), stdin);
  30     sha1_update(&ctx, done, buffer);
  31     if (done < sizeof(buffer))
  32       break;
  33   }
  34   if (ferror(stdin))
  35     return EXIT_FAILURE;
  36
  37   sha1_digest(&ctx, SHA1_DIGEST_SIZE, digest);
  38
  39   display_hex(SHA1_DIGEST_SIZE, digest);
  40   return EXIT_SUCCESS;
  41 }