apps.c

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/* apps/apps.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * 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 (tjh@cryptsoft.com).
 * 
 * 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 (eay@cryptsoft.com)"
 *    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 (tjh@cryptsoft.com)"
 * 
 * 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
 *    openssl-core@openssl.org.
 *
 * 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
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#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
#ifndef OPENSSL_NO_RSA
#include <openssl/rsa.h>
#endif
#include <openssl/bn.h>

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

typedef struct {
        const 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) || defined(OPENSSL_SYS_NETWARE)
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);

#if defined(OPENSSL_SYS_NETWARE)
   /* strip off trailing .nlm if present. */
   if ((n > 4) && (p[n-4] == '.') &&
      ((p[n-3] == 'n') || (p[n-3] == 'N')) &&
      ((p[n-2] == 'l') || (p[n-2] == 'L')) &&
      ((p[n-1] == 'm') || (p[n-1] == 'M')))
      n-=4;
#else
        /* 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;
#endif

        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;
        int res = 0;
        const char *prompt_info = NULL;
        const char *password = NULL;
        PW_CB_DATA *cb_data = (PW_CB_DATA *)cb_tmp;

        if (cb_data)
                {
                if (cb_data->password)
                        password = cb_data->password;
                if (cb_data->prompt_info)
                        prompt_info = cb_data->prompt_info;
                }

        if (password)
                {
                res = strlen(password);
                if (res > bufsiz)
                        res = bufsiz;
                memcpy(buf, password, res);
                return res;
                }

        ui = UI_new_method(ui_method);
        if (ui)
                {
                int ok = 0;
                char *buff = NULL;
                int ui_flags = 0;
                char *prompt = NULL;

                prompt = UI_construct_prompt(ui, "pass phrase",
                        prompt_info);

                ui_flags |= UI_INPUT_FLAG_DEFAULT_PWD;
                UI_ctrl(ui, UI_CTRL_PRINT_ERRORS, 1, 0, 0);

                if (ok >= 0)
                        ok = UI_add_input_string(ui,prompt,ui_flags,buf,
                                PW_MIN_LENGTH,BUFSIZ-1);
                if (ok >= 0 && verify)
                        {
                        buff = (char *)OPENSSL_malloc(bufsiz);
                        ok = UI_add_verify_string(ui,prompt,ui_flags,buff,
                                PW_MIN_LENGTH,BUFSIZ-1, buf);
                        }
                if (ok >= 0)
                        do
                                {
                                ok = UI_process(ui);
                                }
                        while (ok < 0 && UI_ctrl(ui, UI_CTRL_IS_REDOABLE, 0, 0, 0));

                if (buff)
                        {
                        OPENSSL_cleanse(buff,(unsigned int)bufsiz);
                        OPENSSL_free(buff);
                        }

                if (ok >= 0)
                        res = strlen(buf);
                if (ok == -1)
                        {
                        BIO_printf(bio_err, "User interface error\n");
                        ERR_print_errors(bio_err);
                        OPENSSL_cleanse(buf,(unsigned int)bufsiz);
                        res = 0;
                        }
                if (ok == -2)
                        {
                        BIO_printf(bio_err,"aborted!\n");
                        OPENSSL_cleanse(buf,(unsigned int)bufsiz);
                        res = 0;
                        }
                UI_free(ui);
                OPENSSL_free(prompt);
                }
        return res;
        }

static char *app_get_pass(BIO *err, char *arg, int keepbio);

int app_passwd(BIO *err, char *arg1, char *arg2, char **pass1, char **pass2)
{
        int same;
        if(!arg2 || !arg1 || strcmp(arg1, arg2)) same = 0;
        else same = 1;
        if(arg1) {
                *pass1 = app_get_pass(err, arg1, same);
                if(!*pass1) return 0;
        } else if(pass1) *pass1 = NULL;
        if(arg2) {
                *pass2 = app_get_pass(err, arg2, same ? 2 : 0);
                if(!*pass2) return 0;
        } else if(pass2) *pass2 = NULL;
        return 1;
}

static char *app_get_pass(BIO *err, char *arg, int keepbio)
{
        char *tmp, tpass[APP_PASS_LEN];
        static BIO *pwdbio = NULL;
        int i;
        if(!strncmp(arg, "pass:", 5)) return BUF_strdup(arg + 5);
        if(!strncmp(arg, "env:", 4)) {
                tmp = getenv(arg + 4);
                if(!tmp) {
                        BIO_printf(err, "Can't read environment variable %s\n", arg + 4);
                        return NULL;
                }
                return BUF_strdup(tmp);
        }
        if(!keepbio || !pwdbio) {
                if(!strncmp(arg, "file:", 5)) {
                        pwdbio = BIO_new_file(arg + 5, "r");
                        if(!pwdbio) {
                                BIO_printf(err, "Can't open file %s\n", arg + 5);
                                return NULL;
                        }
                } else if(!strncmp(arg, "fd:", 3)) {
                        BIO *btmp;
                        i = atoi(arg + 3);
                        if(i >= 0) pwdbio = BIO_new_fd(i, BIO_NOCLOSE);
                        if((i < 0) || !pwdbio) {
                                BIO_printf(err, "Can't access file descriptor %s\n", arg + 3);
                                return NULL;
                        }
                        /* Can't do BIO_gets on an fd BIO so add a buffering BIO */
                        btmp = BIO_new(BIO_f_buffer());
                        pwdbio = BIO_push(btmp, pwdbio);
                } else if(!strcmp(arg, "stdin")) {
                        pwdbio = BIO_new_fp(stdin, BIO_NOCLOSE);
                        if(!pwdbio) {
                                BIO_printf(err, "Can't open BIO for stdin\n");
                                return NULL;
                        }
                } else {
                        BIO_printf(err, "Invalid password argument \"%s\"\n", arg);
                        return NULL;
                }
        }
        i = BIO_gets(pwdbio, tpass, APP_PASS_LEN);
        if(keepbio != 1) {
                BIO_free_all(pwdbio);
                pwdbio = NULL;
        }
        if(i <= 0) {
                BIO_printf(err, "Error reading password from BIO\n");
                return NULL;
        }
        tmp = strchr(tpass, '\n');
        if(tmp) *tmp = 0;
        return BUF_strdup(tpass);
}

int add_oid_section(BIO *err, CONF *conf)
{       
        char *p;
        STACK_OF(CONF_VALUE) *sktmp;
        CONF_VALUE *cnf;
        int i;
        if(!(p=NCONF_get_string(conf,NULL,"oid_section")))
                {
                ERR_clear_error();
                return 1;
                }
        if(!(sktmp = NCONF_get_section(conf, p))) {
                BIO_printf(err, "problem loading oid section %s\n", p);
                return 0;
        }
        for(i = 0; i < sk_CONF_VALUE_num(sktmp); i++) {
                cnf = sk_CONF_VALUE_value(sktmp, i);
                if(OBJ_create(cnf->value, cnf->name, cnf->name) == NID_undef) {
                        BIO_printf(err, "problem creating object %s=%s\n",
                                                         cnf->name, cnf->value);
                        return 0;
                }
        }
        return 1;
}

static int load_pkcs12(BIO *err, BIO *in, const char *desc,
                pem_password_cb *pem_cb,  void *cb_data,
                EVP_PKEY **pkey, X509 **cert, STACK_OF(X509) **ca)
        {
        const char *pass;
        char tpass[PEM_BUFSIZE];
        int len, ret = 0;
        PKCS12 *p12;
        p12 = d2i_PKCS12_bio(in, NULL);
        if (p12 == NULL)
                {
                BIO_printf(err, "Error loading PKCS12 file for %s\n", desc);    
                goto die;
                }
        /* See if an empty password will do */
        if (PKCS12_verify_mac(p12, "", 0) || PKCS12_verify_mac(p12, NULL, 0))
                pass = "";
        else
                {
                if (!pem_cb)
                        pem_cb = (pem_password_cb *)password_callback;
                len = pem_cb(tpass, PEM_BUFSIZE, 0, cb_data);
                if (len < 0) 
                        {
                        BIO_printf(err, "Passpharse callback error for %s\n",
                                        desc);
                        goto die;
                        }
                if (len < PEM_BUFSIZE)
                        tpass[len] = 0;
                if (!PKCS12_verify_mac(p12, tpass, len))
                        {
                        BIO_printf(err,
        "Mac verify error (wrong password?) in PKCS12 file for %s\n", desc);    
                        goto die;
                        }
                pass = tpass;
                }
        ret = PKCS12_parse(p12, pass, pkey, cert, ca);
        die:
        if (p12)
                PKCS12_free(p12);
        return ret;
        }

X509 *load_cert(BIO *err, const char *file, int format,
        const char *pass, ENGINE *e, const char *cert_descrip)
        {
        ASN1_HEADER *ah=NULL;
        BUF_MEM *buf=NULL;
        X509 *x=NULL;
        BIO *cert;

        if ((cert=BIO_new(BIO_s_file())) == NULL)
                {
                ERR_print_errors(err);
                goto end;
                }

        if (file == NULL)
                {
                setvbuf(stdin, NULL, _IONBF, 0);
                BIO_set_fp(cert,stdin,BIO_NOCLOSE);
                }
        else
                {
                if (BIO_read_filename(cert,file) <= 0)
                        {
                        BIO_printf(err, "Error opening %s %s\n",
                                cert_descrip, file);
                        ERR_print_errors(err);
                        goto end;
                        }
                }

        if      (format == FORMAT_ASN1)
                x=d2i_X509_bio(cert,NULL);
        else if (format == FORMAT_NETSCAPE)
                {
                const unsigned char *p,*op;
                int size=0,i;

                /* We sort of have to do it this way because it is sort of nice
                 * to read the header first and check it, then
                 * try to read the certificate */
                buf=BUF_MEM_new();
                for (;;)
                        {
                        if ((buf == NULL) || (!BUF_MEM_grow(buf,size+1024*10)))
                                goto end;
                        i=BIO_read(cert,&(buf->data[size]),1024*10);
                        size+=i;
                        if (i == 0) break;
                        if (i < 0)
                                {
                                perror("reading certificate");
                                goto end;
                                }
                        }
                p=(unsigned char *)buf->data;
                op=p;

                /* First load the header */
                if ((ah=d2i_ASN1_HEADER(NULL,&p,(long)size)) == NULL)
                        goto end;
                if ((ah->header == NULL) || (ah->header->data == NULL) ||
                        (strncmp(NETSCAPE_CERT_HDR,(char *)ah->header->data,
                        ah->header->length) != 0))
                        {
                        BIO_printf(err,"Error reading header on certificate\n");
                        goto end;
                        }
                /* header is ok, so now read the object */
                p=op;
                ah->meth=X509_asn1_meth();
                if ((ah=d2i_ASN1_HEADER(&ah,&p,(long)size)) == NULL)
                        goto end;
                x=(X509 *)ah->data;
                ah->data=NULL;
                }
        else if (format == FORMAT_PEM)
                x=PEM_read_bio_X509_AUX(cert,NULL,
                        (pem_password_cb *)password_callback, NULL);
        else if (format == FORMAT_PKCS12)
                {
                if (!load_pkcs12(err, cert,cert_descrip, NULL, NULL,
                                        NULL, &x, NULL))
                        goto end;
                }
        else    {
                BIO_printf(err,"bad input format specified for %s\n",
                        cert_descrip);
                goto end;
                }
end:
        if (x == NULL)
                {
                BIO_printf(err,"unable to load certificate\n");
                ERR_print_errors(err);
                }
        if (ah != NULL) ASN1_HEADER_free(ah);
        if (cert != NULL) BIO_free(cert);
        if (buf != NULL) BUF_MEM_free(buf);
        return(x);
        }

EVP_PKEY *load_key(BIO *err, const char *file, int format, int maybe_stdin,
        const char *pass, ENGINE *e, const char *key_descrip)
        {
        BIO *key=NULL;
        EVP_PKEY *pkey=NULL;
        PW_CB_DATA cb_data;

        cb_data.password = pass;
        cb_data.prompt_info = file;

        if (file == NULL && (!maybe_stdin || format == FORMAT_ENGINE))
                {
                BIO_printf(err,"no keyfile specified\n");
                goto end;
                }
#ifndef OPENSSL_NO_ENGINE
        if (format == FORMAT_ENGINE)
                {
                if (!e)
                        BIO_printf(bio_err,"no engine specified\n");
                else
                        pkey = ENGINE_load_private_key(e, file,
                                ui_method, &cb_data);
                goto end;
                }
#endif
        key=BIO_new(BIO_s_file());
        if (key == NULL)
                {
                ERR_print_errors(err);
                goto end;
                }
        if (file == NULL && maybe_stdin)
                {
                setvbuf(stdin, NULL, _IONBF, 0);
                BIO_set_fp(key,stdin,BIO_NOCLOSE);
                }
        else
                if (BIO_read_filename(key,file) <= 0)
                        {
                        BIO_printf(err, "Error opening %s %s\n",
                                key_descrip, file);
                        ERR_print_errors(err);
                        goto end;
                        }
        if (format == FORMAT_ASN1)
                {
                pkey=d2i_PrivateKey_bio(key, NULL);
                }
        else if (format == FORMAT_PEM)
                {
                pkey=PEM_read_bio_PrivateKey(key,NULL,
                        (pem_password_cb *)password_callback, &cb_data);
                }
#if !defined(OPENSSL_NO_RC4) && !defined(OPENSSL_NO_RSA)
        else if (format == FORMAT_NETSCAPE || format == FORMAT_IISSGC)
                pkey = load_netscape_key(err, key, file, key_descrip, format);
#endif
        else if (format == FORMAT_PKCS12)
                {
                if (!load_pkcs12(err, key, key_descrip,
                                (pem_password_cb *)password_callback, &cb_data,
                                &pkey, NULL, NULL))
                        goto end;
                }
        else
                {
                BIO_printf(err,"bad input format specified for key file\n");
                goto end;
                }
 end:
        if (key != NULL) BIO_free(key);
        if (pkey == NULL)
                BIO_printf(err,"unable to load %s\n", key_descrip);
        return(pkey);
        }

EVP_PKEY *load_pubkey(BIO *err, const char *file, int format, int maybe_stdin,
        const char *pass, ENGINE *e, const char *key_descrip)
        {
        BIO *key=NULL;
        EVP_PKEY *pkey=NULL;
        PW_CB_DATA cb_data;

        cb_data.password = pass;
        cb_data.prompt_info = file;

        if (file == NULL && (!maybe_stdin || format == FORMAT_ENGINE))
                {
                BIO_printf(err,"no keyfile specified\n");
                goto end;
                }
#ifndef OPENSSL_NO_ENGINE
        if (format == FORMAT_ENGINE)
                {
                if (!e)
                        BIO_printf(bio_err,"no engine specified\n");
                else
                        pkey = ENGINE_load_public_key(e, file,
                                ui_method, &cb_data);
                goto end;
                }
#endif
        key=BIO_new(BIO_s_file());
        if (key == NULL)
                {
                ERR_print_errors(err);
                goto end;
                }
        if (file == NULL && maybe_stdin)
                {
                setvbuf(stdin, NULL, _IONBF, 0);
                BIO_set_fp(key,stdin,BIO_NOCLOSE);
                }
        else
                if (BIO_read_filename(key,file) <= 0)
                        {
                        BIO_printf(err, "Error opening %s %s\n",
                                key_descrip, file);
                        ERR_print_errors(err);
                        goto end;
                }
        if (format == FORMAT_ASN1)
                {
                pkey=d2i_PUBKEY_bio(key, NULL);
                }
        else if (format == FORMAT_PEM)
                {
                pkey=PEM_read_bio_PUBKEY(key,NULL,
                        (pem_password_cb *)password_callback, &cb_data);
                }
#if !defined(OPENSSL_NO_RC4) && !defined(OPENSSL_NO_RSA)
        else if (format == FORMAT_NETSCAPE || format == FORMAT_IISSGC)
                pkey = load_netscape_key(err, key, file, key_descrip, format);
#endif
        else
                {
                BIO_printf(err,"bad input format specified for key file\n");
                goto end;
                }
 end:
        if (key != NULL) BIO_free(key);
        if (pkey == NULL)
                BIO_printf(err,"unable to load %s\n", key_descrip);
        return(pkey);
        }

#if !defined(OPENSSL_NO_RC4) && !defined(OPENSSL_NO_RSA)
static EVP_PKEY *
load_netscape_key(BIO *err, BIO *key, const char *file,
                const char *key_descrip, int format)
        {
        EVP_PKEY *pkey;
        BUF_MEM *buf;
        RSA     *rsa;
        const unsigned char *p;
        int size, i;

        buf=BUF_MEM_new();
        pkey = EVP_PKEY_new();
        size = 0;
        if (buf == NULL || pkey == NULL)
                goto error;
        for (;;)
                {
                if (!BUF_MEM_grow_clean(buf,size+1024*10))
                        goto error;
                i = BIO_read(key, &(buf->data[size]), 1024*10);
                size += i;
                if (i == 0)
                        break;
                if (i < 0)
                        {
                                BIO_printf(err, "Error reading %s %s",
                                        key_descrip, file);
                                goto error;
                        }
                }
        p=(unsigned char *)buf->data;
        rsa = d2i_RSA_NET(NULL,&p,(long)size,NULL,
                (format == FORMAT_IISSGC ? 1 : 0));
        if (rsa == NULL)
                goto error;
        BUF_MEM_free(buf);
        EVP_PKEY_set1_RSA(pkey, rsa);
        return pkey;
error:
        BUF_MEM_free(buf);
        EVP_PKEY_free(pkey);
        return NULL;
        }
#endif /* ndef OPENSSL_NO_RC4 */

STACK_OF(X509) *load_certs(BIO *err, const char *file, int format,
        const char *pass, ENGINE *e, const char *cert_descrip)
        {
        BIO *certs;
        int i;
        STACK_OF(X509) *othercerts = NULL;
        STACK_OF(X509_INFO) *allcerts = NULL;
        X509_INFO *xi;
        PW_CB_DATA cb_data;

        cb_data.password = pass;
        cb_data.prompt_info = file;

        if((certs = BIO_new(BIO_s_file())) == NULL)
                {
                ERR_print_errors(err);
                goto end;
                }

        if (file == NULL)
                BIO_set_fp(certs,stdin,BIO_NOCLOSE);
        else
                {
                if (BIO_read_filename(certs,file) <= 0)
                        {
                        BIO_printf(err, "Error opening %s %s\n",
                                cert_descrip, file);
                        ERR_print_errors(err);
                        goto end;
                        }
                }

        if      (format == FORMAT_PEM)
                {
                othercerts = sk_X509_new_null();
                if(!othercerts)
                        {
                        sk_X509_free(othercerts);
                        othercerts = NULL;
                        goto end;
                        }
                allcerts = PEM_X509_INFO_read_bio(certs, NULL,
                                (pem_password_cb *)password_callback, &cb_data);
                for(i = 0; i < sk_X509_INFO_num(allcerts); i++)
                        {
                        xi = sk_X509_INFO_value (allcerts, i);
                        if (xi->x509)
                                {
                                sk_X509_push(othercerts, xi->x509);
                                xi->x509 = NULL;
                                }
                        }
                goto end;
                }
        else    {
                BIO_printf(err,"bad input format specified for %s\n",
                        cert_descrip);
                goto end;
                }
end:
        if (othercerts == NULL)
                {
                BIO_printf(err,"unable to load certificates\n");
                ERR_print_errors(err);
                }
        if (allcerts) sk_X509_INFO_pop_free(allcerts, X509_INFO_free);
        if (certs != NULL) BIO_free(certs);
        return(othercerts);
        }


#define X509V3_EXT_UNKNOWN_MASK         (0xfL << 16)
/* Return error for unknown extensions */
#define X509V3_EXT_DEFAULT              0
/* Print error for unknown extensions */
#define X509V3_EXT_ERROR_UNKNOWN        (1L << 16)
/* ASN1 parse unknown extensions */
#define X509V3_EXT_PARSE_UNKNOWN        (2L << 16)
/* BIO_dump unknown extensions */
#define X509V3_EXT_DUMP_UNKNOWN         (3L << 16)

#define X509_FLAG_CA (X509_FLAG_NO_ISSUER | X509_FLAG_NO_PUBKEY | \
                         X509_FLAG_NO_HEADER | X509_FLAG_NO_VERSION)

int set_cert_ex(unsigned long *flags, const char *arg)
{
        static const NAME_EX_TBL cert_tbl[] = {
                { "compatible", X509_FLAG_COMPAT, 0xffffffffl},
                { "ca_default", X509_FLAG_CA, 0xffffffffl},
                { "no_header", X509_FLAG_NO_HEADER, 0},
                { "no_version", X509_FLAG_NO_VERSION, 0},
                { "no_serial", X509_FLAG_NO_SERIAL, 0},
                { "no_signame", X509_FLAG_NO_SIGNAME, 0},
                { "no_validity", X509_FLAG_NO_VALIDITY, 0},
                { "no_subject", X509_FLAG_NO_SUBJECT, 0},
                { "no_issuer", X509_FLAG_NO_ISSUER, 0},
                { "no_pubkey", X509_FLAG_NO_PUBKEY, 0},
                { "no_extensions", X509_FLAG_NO_EXTENSIONS, 0},
                { "no_sigdump", X509_FLAG_NO_SIGDUMP, 0},
                { "no_aux", X509_FLAG_NO_AUX, 0},
                { "no_attributes", X509_FLAG_NO_ATTRIBUTES, 0},
                { "ext_default", X509V3_EXT_DEFAULT, X509V3_EXT_UNKNOWN_MASK},
                { "ext_error", X509V3_EXT_ERROR_UNKNOWN, X509V3_EXT_UNKNOWN_MASK},
                { "ext_parse", X509V3_EXT_PARSE_UNKNOWN, X509V3_EXT_UNKNOWN_MASK},
                { "ext_dump", X509V3_EXT_DUMP_UNKNOWN, X509V3_EXT_UNKNOWN_MASK},
                { NULL, 0, 0}
        };
        return set_multi_opts(flags, arg, cert_tbl);
}

int set_name_ex(unsigned long *flags, const char *arg)
{
        static const NAME_EX_TBL ex_tbl[] = {
                { "esc_2253", ASN1_STRFLGS_ESC_2253, 0},
                { "esc_ctrl", ASN1_STRFLGS_ESC_CTRL, 0},
                { "esc_msb", ASN1_STRFLGS_ESC_MSB, 0},
                { "use_quote", ASN1_STRFLGS_ESC_QUOTE, 0},
                { "utf8", ASN1_STRFLGS_UTF8_CONVERT, 0},
                { "ignore_type", ASN1_STRFLGS_IGNORE_TYPE, 0},
                { "show_type", ASN1_STRFLGS_SHOW_TYPE, 0},