source: trunk/third/openssl/apps/verify.c @ 15530

/* apps/verify.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.]
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "apps.h"
#include <openssl/bio.h>
#include <openssl/err.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include <openssl/pem.h>

#undef PROG
#define PROG    verify_main

static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx);
static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose);
static STACK_OF(X509) *load_untrusted(char *file);
static int v_verbose=0, issuer_checks = 0;

int MAIN(int, char **);

int MAIN(int argc, char **argv)
        {
        int i,ret=1;
        int purpose = -1;
        char *CApath=NULL,*CAfile=NULL;
        char *untfile = NULL, *trustfile = NULL;
        STACK_OF(X509) *untrusted = NULL, *trusted = NULL;
        X509_STORE *cert_ctx=NULL;
        X509_LOOKUP *lookup=NULL;

        cert_ctx=X509_STORE_new();
        if (cert_ctx == NULL) goto end;
        X509_STORE_set_verify_cb_func(cert_ctx,cb);

        ERR_load_crypto_strings();

        apps_startup();

        if (bio_err == NULL)
                if ((bio_err=BIO_new(BIO_s_file())) != NULL)
                        BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);

        argc--;
        argv++;
        for (;;)
                {
                if (argc >= 1)
                        {
                        if (strcmp(*argv,"-CApath") == 0)
                                {
                                if (argc-- < 1) goto end;
                                CApath= *(++argv);
                                }
                        else if (strcmp(*argv,"-CAfile") == 0)
                                {
                                if (argc-- < 1) goto end;
                                CAfile= *(++argv);
                                }
                        else if (strcmp(*argv,"-purpose") == 0)
                                {
                                X509_PURPOSE *xptmp;
                                if (argc-- < 1) goto end;
                                i = X509_PURPOSE_get_by_sname(*(++argv));
                                if(i < 0)
                                        {
                                        BIO_printf(bio_err, "unrecognized purpose\n");
                                        goto end;
                                        }
                                xptmp = X509_PURPOSE_get0(i);
                                purpose = X509_PURPOSE_get_id(xptmp);
                                }
                        else if (strcmp(*argv,"-untrusted") == 0)
                                {
                                if (argc-- < 1) goto end;
                                untfile= *(++argv);
                                }
                        else if (strcmp(*argv,"-trusted") == 0)
                                {
                                if (argc-- < 1) goto end;
                                trustfile= *(++argv);
                                }
                        else if (strcmp(*argv,"-help") == 0)
                                goto end;
                        else if (strcmp(*argv,"-issuer_checks") == 0)
                                issuer_checks=1;
                        else if (strcmp(*argv,"-verbose") == 0)
                                v_verbose=1;
                        else if (argv[0][0] == '-')
                                goto end;
                        else
                                break;
                        argc--;
                        argv++;
                        }
                else
                        break;
                }

        lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_file());
        if (lookup == NULL) abort();
        if (CAfile) {
                i=X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM);
                if(!i) {
                        BIO_printf(bio_err, "Error loading file %s\n", CAfile);
                        ERR_print_errors(bio_err);
                        goto end;
                }
        } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
                
        lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_hash_dir());
        if (lookup == NULL) abort();
        if (CApath) {
                i=X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM);
                if(!i) {
                        BIO_printf(bio_err, "Error loading directory %s\n", CApath);
                        ERR_print_errors(bio_err);
                        goto end;
                }
        } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);

        ERR_clear_error();

        if(untfile) {
                if(!(untrusted = load_untrusted(untfile))) {
                        BIO_printf(bio_err, "Error loading untrusted file %s\n", untfile);
                        ERR_print_errors(bio_err);
                        goto end;
                }
        }

        if(trustfile) {
                if(!(trusted = load_untrusted(trustfile))) {
                        BIO_printf(bio_err, "Error loading untrusted file %s\n", trustfile);
                        ERR_print_errors(bio_err);
                        goto end;
                }
        }

        if (argc < 1) check(cert_ctx, NULL, untrusted, trusted, purpose);
        else
                for (i=0; i<argc; i++)
                        check(cert_ctx,argv[i], untrusted, trusted, purpose);
        ret=0;
end:
        if (ret == 1) {
                BIO_printf(bio_err,"usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] cert1 cert2 ...\n");
                BIO_printf(bio_err,"recognized usages:\n");
                for(i = 0; i < X509_PURPOSE_get_count(); i++) {
                        X509_PURPOSE *ptmp;
                        ptmp = X509_PURPOSE_get0(i);
                        BIO_printf(bio_err, "\t%-10s\t%s\n", X509_PURPOSE_get0_sname(ptmp),
                                                                X509_PURPOSE_get0_name(ptmp));
                }
        }
        if (cert_ctx != NULL) X509_STORE_free(cert_ctx);
        sk_X509_pop_free(untrusted, X509_free);
        sk_X509_pop_free(trusted, X509_free);
        EXIT(ret);
        }

static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose)
        {
        X509 *x=NULL;
        BIO *in=NULL;
        int i=0,ret=0;
        X509_STORE_CTX *csc;

        in=BIO_new(BIO_s_file());
        if (in == NULL)
                {
                ERR_print_errors(bio_err);
                goto end;
                }

        if (file == NULL)
                BIO_set_fp(in,stdin,BIO_NOCLOSE);
        else
                {
                if (BIO_read_filename(in,file) <= 0)
                        {
                        perror(file);
                        goto end;
                        }
                }

        x=PEM_read_bio_X509(in,NULL,NULL,NULL);
        if (x == NULL)
                {
                fprintf(stdout,"%s: unable to load certificate file\n",
                        (file == NULL)?"stdin":file);
                ERR_print_errors(bio_err);
                goto end;
                }
        fprintf(stdout,"%s: ",(file == NULL)?"stdin":file);

        csc = X509_STORE_CTX_new();
        if (csc == NULL)
                {
                ERR_print_errors(bio_err);
                goto end;
                }
        X509_STORE_CTX_init(csc,ctx,x,uchain);
        if(tchain) X509_STORE_CTX_trusted_stack(csc, tchain);
        if(purpose >= 0) X509_STORE_CTX_set_purpose(csc, purpose);
        if(issuer_checks)
                X509_STORE_CTX_set_flags(csc, X509_V_FLAG_CB_ISSUER_CHECK);
        i=X509_verify_cert(csc);
        X509_STORE_CTX_free(csc);

        ret=0;
end:
        if (i)
                {
                fprintf(stdout,"OK\n");
                ret=1;
                }
        else
                ERR_print_errors(bio_err);
        if (x != NULL) X509_free(x);
        if (in != NULL) BIO_free(in);

        return(ret);
        }

static STACK_OF(X509) *load_untrusted(char *certfile)
{
        STACK_OF(X509_INFO) *sk=NULL;
        STACK_OF(X509) *stack=NULL, *ret=NULL;
        BIO *in=NULL;
        X509_INFO *xi;

        if(!(stack = sk_X509_new_null())) {
                BIO_printf(bio_err,"memory allocation failure\n");
                goto end;
        }

        if(!(in=BIO_new_file(certfile, "r"))) {
                BIO_printf(bio_err,"error opening the file, %s\n",certfile);
                goto end;
        }

        /* This loads from a file, a stack of x509/crl/pkey sets */
        if(!(sk=PEM_X509_INFO_read_bio(in,NULL,NULL,NULL))) {
                BIO_printf(bio_err,"error reading the file, %s\n",certfile);
                goto end;
        }

        /* scan over it and pull out the certs */
        while (sk_X509_INFO_num(sk))
                {
                xi=sk_X509_INFO_shift(sk);
                if (xi->x509 != NULL)
                        {
                        sk_X509_push(stack,xi->x509);
                        xi->x509=NULL;
                        }
                X509_INFO_free(xi);
                }
        if(!sk_X509_num(stack)) {
                BIO_printf(bio_err,"no certificates in file, %s\n",certfile);
                sk_X509_free(stack);
                goto end;
        }
        ret=stack;
end:
        BIO_free(in);
        sk_X509_INFO_free(sk);
        return(ret);
        }

static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx)
        {
        char buf[256];

        if (!ok)
                {
                X509_NAME_oneline(
                                X509_get_subject_name(ctx->current_cert),buf,256);
                printf("%s\n",buf);
                printf("error %d at %d depth lookup:%s\n",ctx->error,
                        ctx->error_depth,
                        X509_verify_cert_error_string(ctx->error));
                if (ctx->error == X509_V_ERR_CERT_HAS_EXPIRED) ok=1;
                /* since we are just checking the certificates, it is
                 * ok if they are self signed. But we should still warn
                 * the user.
                 */
                if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
                /* Continue after extension errors too */
                if (ctx->error == X509_V_ERR_INVALID_CA) ok=1;
                if (ctx->error == X509_V_ERR_PATH_LENGTH_EXCEEDED) ok=1;
                if (ctx->error == X509_V_ERR_INVALID_PURPOSE) ok=1;
                if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1;
                }
        if (!v_verbose)
                ERR_clear_error();
        return(ok);
        }