apps.c

openssl加密例子

/* apps/apps.c */
/* Copyright (C) 1995-1998 Eric Young ([e-mail])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([e-mail]).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson ([e-mail]).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young ([e-mail])"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson ([e-mail])"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1998-2001 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    [e-mail].
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * ([e-mail]).  This product includes software written by Tim
 * Hudson ([e-mail]).
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <ctype.h>
#include <openssl/err.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include <openssl/pem.h>
#include <openssl/pkcs12.h>
#include <openssl/ui.h>
#include <openssl/safestack.h>
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif

#define NON_MAIN
#include "apps.h"
#undef NON_MAIN

typedef struct {
	char *name;
	unsigned long flag;
	unsigned long mask;
} NAME_EX_TBL;

static UI_METHOD *ui_method = NULL;

static int set_table_opts(unsigned long *flags, const char *arg, const NAME_EX_TBL *in_tbl);
static int set_multi_opts(unsigned long *flags, const char *arg, const NAME_EX_TBL *in_tbl);

#if !defined(OPENSSL_NO_RC4) && !defined(OPENSSL_NO_RSA)
/* Looks like this stuff is worth moving into separate function */
static EVP_PKEY *
load_netscape_key(BIO *err, BIO *key, const char *file,
		const char *key_descrip, int format);
#endif

int app_init(long mesgwin);
#ifdef undef /* never finished - probably never will be :-) */
int args_from_file(char *file, int *argc, char **argv[])
{
	FILE *fp;
	int num,i;
	unsigned int len;
	static char *buf=NULL;
	static char **arg=NULL;
	char *p;
	struct stat stbuf;

	if (stat(file,&stbuf) < 0) return(0);

	fp=fopen(file,"r");
	if (fp == NULL)
		return(0);

	*argc=0;
	*argv=NULL;

	len=(unsigned int)stbuf.st_size;
	if (buf != NULL) OPENSSL_free(buf);
	buf=(char *)OPENSSL_malloc(len+1);
	if (buf == NULL) return(0);

	len=fread(buf,1,len,fp);
	if (len <= 1) return(0);
	buf[len]='\0';

	i=0;
	for (p=buf; *p; p++)
		if (*p == '\n') i++;
	if (arg != NULL) OPENSSL_free(arg);
	arg=(char **)OPENSSL_malloc(sizeof(char *)*(i*2));

	*argv=arg;
	num=0;
	p=buf;
	for (;;)
	{
		if (!*p) break;
		if (*p == '#') /* comment line */
		{
			while (*p && (*p != '\n')) p++;
			continue;
		}
		/* else we have a line */
		*(arg++)=p;
		num++;
		while (*p && ((*p != ' ') && (*p != '\t') && (*p != '\n')))
			p++;
		if (!*p) break;
		if (*p == '\n')
		{
			*(p++)='\0';
			continue;
		}
		/* else it is a tab or space */
		p++;
		while (*p && ((*p == ' ') || (*p == '\t') || (*p == '\n')))
			p++;
		if (!*p) break;
		if (*p == '\n')
		{
			p++;
			continue;
		}
		*(arg++)=p++;
		num++;
		while (*p && (*p != '\n')) p++;
		if (!*p) break;
		/* else *p == '\n' */
		*(p++)='\0';
	}
	*argc=num;
	return(1);
}
#endif

int str2fmt(char *s)
{
	if 	((*s == 'D') || (*s == 'd'))
		return(FORMAT_ASN1);
	else if ((*s == 'T') || (*s == 't'))
		return(FORMAT_TEXT);
	else if ((*s == 'P') || (*s == 'p'))
		return(FORMAT_PEM);
	else if ((*s == 'N') || (*s == 'n'))
		return(FORMAT_NETSCAPE);
	else if ((*s == 'S') || (*s == 's'))
		return(FORMAT_SMIME);
	else if ((*s == '1')
		|| (strcmp(s,"PKCS12") == 0) || (strcmp(s,"pkcs12") == 0)
		|| (strcmp(s,"P12") == 0) || (strcmp(s,"p12") == 0))
		return(FORMAT_PKCS12);
	else if ((*s == 'E') || (*s == 'e'))
		return(FORMAT_ENGINE);
	else
		return(FORMAT_UNDEF);
}

#if defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
void program_name(char *in, char *out, int size)
{
	int i,n;
	char *p=NULL;

	n=strlen(in);
	/* find the last '/', '\' or ':' */
	for (i=n-1; i>0; i--)
	{
		if ((in[i] == '/') || (in[i] == '\\') || (in[i] == ':'))
		{
			p= &(in[i+1]);
			break;
		}
	}
	if (p == NULL)
		p=in;
	n=strlen(p);
	/* strip off trailing .exe if present. */
	if ((n > 4) && (p[n-4] == '.') &&
		((p[n-3] == 'e') || (p[n-3] == 'E')) &&
		((p[n-2] == 'x') || (p[n-2] == 'X')) &&
		((p[n-1] == 'e') || (p[n-1] == 'E')))
		n-=4;
	if (n > size-1)
		n=size-1;

	for (i=0; i<n; i++)
	{
		if ((p[i] >= 'A') && (p[i] <= 'Z'))
			out[i]=p[i]-'A'+'a';
		else
			out[i]=p[i];
	}
	out[n]='\0';
}
#else
#ifdef OPENSSL_SYS_VMS
void program_name(char *in, char *out, int size)
{
	char *p=in, *q;
	char *chars=":]>";

	while(*chars != '\0')
	{
		q=strrchr(p,*chars);
		if (q > p)
			p = q + 1;
		chars++;
	}

	q=strrchr(p,'.');
	if (q == NULL)
		q = p + strlen(p);
	strncpy(out,p,size-1);
	if (q-p >= size)
	{
		out[size-1]='\0';
	}
	else
	{
		out[q-p]='\0';
	}
}
#else
void program_name(char *in, char *out, int size)
{
	char *p;

	p=strrchr(in,'/');
	if (p != NULL)
		p++;
	else
		p=in;
	BUF_strlcpy(out,p,size);
}
#endif
#endif

int chopup_args(ARGS *arg, char *buf, int *argc, char **argv[])
{
	int num,len,i;
	char *p;

	*argc=0;
	*argv=NULL;

	len=strlen(buf);
	i=0;
	if (arg->count == 0)
		{
		arg->count=20;
		arg->data=(char **)OPENSSL_malloc(sizeof(char *)*arg->count);
		}
	for (i=0; i<arg->count; i++)
		arg->data[i]=NULL;

	num=0;
	p=buf;
	for (;;)
		{
		/* first scan over white space */
		if (!*p) break;
		while (*p && ((*p == ' ') || (*p == '\t') || (*p == '\n')))
			p++;
		if (!*p) break;

		/* The start of something good :-) */
		if (num >= arg->count)
			{
			char **tmp_p;
			int tlen = arg->count + 20;
			tmp_p = (char **)OPENSSL_realloc(arg->data,
				sizeof(char *)*tlen);
			if (tmp_p == NULL)
				return 0;
			arg->data  = tmp_p;
			arg->count = tlen;
			/* initialize newly allocated data */
			for (i = num; i < arg->count; i++)
				arg->data[i] = NULL;
			}
		arg->data[num++]=p;

		/* now look for the end of this */
		if ((*p == '\'') || (*p == '\"')) /* scan for closing quote */
			{
			i= *(p++);
			arg->data[num-1]++; /* jump over quote */
			while (*p && (*p != i))
				p++;
			*p='\0';
			}
		else
			{
			while (*p && ((*p != ' ') &&
				(*p != '\t') && (*p != '\n')))
				p++;

			if (*p == '\0')
				p--;
			else
				*p='\0';
			}
		p++;
	}
	*argc=num;
	*argv=arg->data;
	return(1);
}

#ifndef APP_INIT
int app_init(long mesgwin)
{
	return(1);
}
#endif


int dump_cert_text (BIO *out, X509 *x)
{
	char *p;

	p=X509_NAME_oneline(X509_get_subject_name(x),NULL,0);
	BIO_puts(out,"subject=");
	BIO_puts(out,p);
	OPENSSL_free(p);

	p=X509_NAME_oneline(X509_get_issuer_name(x),NULL,0);
	BIO_puts(out,"\nissuer=");
	BIO_puts(out,p);
	BIO_puts(out,"\n");
	OPENSSL_free(p);

	return 0;
}

static int ui_open(UI *ui)
{
	return UI_method_get_opener(UI_OpenSSL())(ui);
}
static int ui_read(UI *ui, UI_STRING *uis)
{
	if (UI_get_input_flags(uis) & UI_INPUT_FLAG_DEFAULT_PWD
		&& UI_get0_user_data(ui))
	{
		switch(UI_get_string_type(uis))
		{
		case UIT_PROMPT:
		case UIT_VERIFY:
			{
			const char *password =
				((PW_CB_DATA *)UI_get0_user_data(ui))->password;
			if (password && password[0] != '\0')
				{
				UI_set_result(ui, uis, password);
				return 1;
				}
			}
		default:
			break;
		}
	}
	return UI_method_get_reader(UI_OpenSSL())(ui, uis);
}

static int ui_write(UI *ui, UI_STRING *uis)
{
	if (UI_get_input_flags(uis) & UI_INPUT_FLAG_DEFAULT_PWD
		&& UI_get0_user_data(ui))
	{
		switch(UI_get_string_type(uis))
		{
		case UIT_PROMPT:
		case UIT_VERIFY:
			{
			const char *password =
				((PW_CB_DATA *)UI_get0_user_data(ui))->password;
			if (password && password[0] != '\0')
				return 1;
			}
		default:
			break;
		}
	}
return UI_method_get_writer(UI_OpenSSL())(ui, uis);
}

static int ui_close(UI *ui)
{
	return UI_method_get_closer(UI_OpenSSL())(ui);
}

int setup_ui_method(void)
{
	ui_method = UI_create_method("OpenSSL application user interface");
	UI_method_set_opener(ui_method, ui_open);
	UI_method_set_reader(ui_method, ui_read);
	UI_method_set_writer(ui_method, ui_write);
	UI_method_set_closer(ui_method, ui_close);
	return 0;
}

void destroy_ui_method(void)
{
	if(ui_method)
		{
		UI_destroy_method(ui_method);
		ui_method = NULL;
		}
}

int password_callback(char *buf, int bufsiz, int verify,
	PW_CB_DATA *cb_tmp)
{
	UI *ui = NULL;