md5.c

#include <stdlib.h>
#include <stdio.h>
#include <signal.h>

#include <unistd.h>
#include <sys/wait.h>
#include <sys/types.h>

#include "pop3.h"
#include "md5/md5.h"

/* added by Glynn Clements <glynn@sensei.co.uk> 1997-07-08 */

/*
  modified by Glynn Clements <glynn@sensei.co.uk> 1997-07-11
  to use GNU md5 routines
*/

/**************************************************************************/

static struct md5_ctx ctx;
static const char hex[] = "0123456789abcdef";

/**************************************************************************/

static void
md5_hex(unsigned char *src, char *dst)
{
    unsigned i, c;

    for (i = 0; i < 16; i++)
    {
        c = src[i];
        dst[i * 2 + 0] = hex[c >> 4];
        dst[i * 2 + 1] = hex[c & 0x0F];
    }

    dst[32] = '\0';
}

/**************************************************************************/

void
do_md5_file(FILE *src, long start, long bytes, char *hash)
{
    char buff[1024];
    unsigned char result[16];
    int left, n;

    md5_init_ctx(&ctx);

    fseek(src, start, SEEK_SET);

    while (bytes > 0)
    {
        n = fread(buff, 1, min(bytes, sizeof(buff)), src);
        if (n <= 0)
            break;
        md5_process_bytes(buff, n, &ctx);
        bytes -= n;
    }

    md5_finish_ctx(&ctx, result);
    md5_hex(result, hash);
}

void
do_md5_string(char *pass, int passlen, char *hash)
{
    unsigned char result[16];

    md5_init_ctx(&ctx);
    md5_process_bytes(pass, passlen, &ctx);
    md5_finish_ctx(&ctx, result);
    md5_hex(result, hash);
}

/**************************************************************************/