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eddsa-expand.c

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  • Forked from Nettle / nettle
    Source project has a limited visibility.
    sha-example.c 703 B
    #include <stdio.h>
    #include <stdlib.h>
    
    #include <nettle/sha1.h>
    
    #define BUF_SIZE 1000
    
    static void
    display_hex(unsigned length, uint8_t *data)
    {
      unsigned i;
    
      for (i = 0; i<length; i++)
        printf("%02x ", data[i]);
    
      printf("\n");
    }
    
    int
    main(int argc, char **argv)
    {
      struct sha1_ctx ctx;
      uint8_t buffer[BUF_SIZE];
      uint8_t digest[SHA1_DIGEST_SIZE];
      
      sha1_init(&ctx);
      for (;;)
      {
        int done = fread(buffer, 1, sizeof(buffer), stdin);
        sha1_update(&ctx, done, buffer);
        if (done < sizeof(buffer))
          break;
      }
      if (ferror(stdin))
        return EXIT_FAILURE;
    
      sha1_digest(&ctx, SHA1_DIGEST_SIZE, digest);
    
      display_hex(SHA1_DIGEST_SIZE, digest);
      return EXIT_SUCCESS;  
    }