genkat_hash.c

//
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// disable deprecation for sprintf and fopen
#ifdef _MSC_VER
#define _CRT_SECURE_NO_WARNINGS
#endif

#include <stdio.h>
#include <string.h>

#include "api.h"
#include "crypto_hash.h"

#define KAT_SUCCESS 0
#define KAT_FILE_OPEN_ERROR -1
#define KAT_DATA_ERROR -3
#define KAT_CRYPTO_FAILURE -4

#define MAX_FILE_NAME 256
#define MAX_MESSAGE_LENGTH 1024

void init_buffer(unsigned char *buffer, unsigned long long numbytes);

void fprint_bstr(FILE *fp, const char *label, const unsigned char *data,
                 unsigned long long length);

int generate_test_vectors();

int main() {
  int ret = generate_test_vectors();

  if (ret != KAT_SUCCESS) {
    fprintf(stderr, "test vector generation failed with code %d\n", ret);
  }

  return ret;
}

int generate_test_vectors() {
  FILE *fp;
  char fileName[MAX_FILE_NAME];
  unsigned char msg[MAX_MESSAGE_LENGTH];
  unsigned char digest[CRYPTO_BYTES];
  int ret_val = KAT_SUCCESS;
  int count = 1;

  init_buffer(msg, sizeof(msg));

  sprintf(fileName, "LWC_HASH_KAT_%d.txt", (CRYPTO_BYTES * 8));

  if ((fp = fopen(fileName, "w")) == NULL) {
    fprintf(stderr, "Couldn't open <%s> for write\n", fileName);
    return KAT_FILE_OPEN_ERROR;
  }

  for (unsigned long long mlen = 0; mlen <= MAX_MESSAGE_LENGTH; mlen++) {
    fprintf(fp, "Count = %d\n", count++);

    fprint_bstr(fp, "Msg = ", msg, mlen);

    ret_val = crypto_hash(digest, msg, mlen);

    if (ret_val != 0) {
      fprintf(fp, "crypto_hash returned <%d>\n", ret_val);
      ret_val = KAT_CRYPTO_FAILURE;
      break;
    }

    fprint_bstr(fp, "MD = ", digest, CRYPTO_BYTES);

    fprintf(fp, "\n");
  }

  fclose(fp);

  return ret_val;
}

void fprint_bstr(FILE *fp, const char *label, const unsigned char *data,
                 unsigned long long length) {
  fprintf(fp, "%s", label);

  for (unsigned long long i = 0; i < length; i++) fprintf(fp, "%02X", data[i]);

  fprintf(fp, "\n");
}

void init_buffer(unsigned char *buffer, unsigned long long numbytes) {
  for (unsigned long long i = 0; i < numbytes; i++)
    buffer[i] = (unsigned char)i;
}