sig_rmd160.c

来自「关于LINUX安全内核的源代码」· C语言 代码 · 共 70 行

/*
 * md5wrapper.c
 *
 *	signature function hook for MD5 (the RSA Data Security, Inc. MD5 
 *	Message Digesting Algorithm) for Tripwire.
 *
 *	The original MD5 code is contained in md5.c in its entirety.
 *
 * Gene Kim
 * Purdue University
 * September 27, 1992
 */

#include <stdio.h>
#include <sys/types.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "sigs.h"
#include "rmd160.h"
#define BUFSIZE 4096


char *btob64();

/*
 * int
 * pf_signature(int fd_in, char *ps_signature, int siglen)
 *
 *	fd_in: 		pointer to input file descriptor
 *	ps_signature: 	pointer to array where signature will be stored
 *	siglen: 	length of the signature array (for overflow checking)
 */

int 
sig_rmd160_get (sig_text,ps_signature)
    char *sig_text;
    byte *ps_signature;
{
    unsigned char buffer[BUFSIZE];
    int		readin;
    int 	i;
    byte   hashcode[RMDsize/8];

    if (strlen(sig_text) <=0) 
    	return -1;
    
    RMD(sig_text,hashcode);
                                
    for (i=0; i<RMDsize/8; i++)
      sprintf(ps_signature+2*i,"%02x", hashcode[i]);
    
    return 0;
}
int rmd160_str(const char *instr,char *series)
{
	int i;
	char buffer[50];

	memset(buffer,'\0',41);
	if ( sig_rmd160_get(instr,buffer) <0 )
		return -1;

	memset(series,'\0',41);
	strncpy(series,buffer,40);
	return 0;
}