#include <stdio.h>

#include <openssl/md2.h>
#include <openssl/md5.h>

#include <pk11func.h>
#include <nss.h>

unsigned char data[16];
unsigned char output[16];

void HexDump(char *buffer, int bytes)
{
  int col = 0;
  int i;
  char buff[18];

  while (bytes--)
  {
    printf("%02x ", (unsigned char)*buffer); // print byte value

    if (isgraph(*buffer))
      sprintf(buff+col, "%c", (unsigned char)*buffer);
    else
      sprintf(buff+col, ".");

    if (col == 15 || bytes == 0)
    {
      if (bytes == 0)
      {
        // end of buffer, figure out how many we are short.
        for (i = 0; i < 15-col; i++)
          printf(" ");
      }
      printf(" %s\n", buff);
      col = 0;
    }
    else col++;

    buffer++;
  }
}

void ossl_md2(void)
{
        MD2_CTX ctx;

        memcpy(data, "", 16);

        MD2_Init(&ctx);
        MD2_Update(&ctx, data, 16);
        MD2_Update(&ctx, data, 16);
        MD2_Final(output, &ctx );
}

void nss_md2(void)
{
        PK11Context *context = 0;
        int len;

        memcpy(data, "", 16);

        context = PK11_CreateDigestContext(SEC_OID_MD2);
        PK11_DigestBegin(context);
        PK11_DigestOp(context, data, 16);
        PK11_DigestOp(context, data, 16);
        PK11_DigestFinal(context, output, &len, 16);
        PK11_DestroyContext(context, PR_TRUE);
}

int main(void)
{
        NSS_NoDB_Init(".");

        ossl_md2();
        HexDump((char *)output, 16);

        nss_md2();
        HexDump((char *)output, 16);

        return 0;
}