1 /* apps/verify.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay@cryptsoft.com). 7 * The implementation was written so as to conform with Netscapes SSL. 8 * 9 * This library is free for commercial and non-commercial use as long as 10 * the following conditions are aheared to. The following conditions 11 * apply to all code found in this distribution, be it the RC4, RSA, 12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation 13 * included with this distribution is covered by the same copyright terms 14 * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15 * 16 * Copyright remains Eric Young's, and as such any Copyright notices in 17 * the code are not to be removed. 18 * If this package is used in a product, Eric Young should be given attribution 19 * as the author of the parts of the library used. 20 * This can be in the form of a textual message at program startup or 21 * in documentation (online or textual) provided with the package. 22 * 23 * Redistribution and use in source and binary forms, with or without 24 * modification, are permitted provided that the following conditions 25 * are met: 26 * 1. Redistributions of source code must retain the copyright 27 * notice, this list of conditions and the following disclaimer. 28 * 2. Redistributions in binary form must reproduce the above copyright 29 * notice, this list of conditions and the following disclaimer in the 30 * documentation and/or other materials provided with the distribution. 31 * 3. All advertising materials mentioning features or use of this software 32 * must display the following acknowledgement: 33 * "This product includes cryptographic software written by 34 * Eric Young (eay@cryptsoft.com)" 35 * The word 'cryptographic' can be left out if the rouines from the library 36 * being used are not cryptographic related :-). 37 * 4. If you include any Windows specific code (or a derivative thereof) from 38 * the apps directory (application code) you must include an acknowledgement: 39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40 * 41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 51 * SUCH DAMAGE. 52 * 53 * The licence and distribution terms for any publically available version or 54 * derivative of this code cannot be changed. i.e. this code cannot simply be 55 * copied and put under another distribution licence 56 * [including the GNU Public Licence.] 57 */ 58 59 #include <stdio.h> 60 #include <stdlib.h> 61 #include <string.h> 62 #include "apps.h" 63 #include <openssl/bio.h> 64 #include <openssl/err.h> 65 #include <openssl/x509.h> 66 #include <openssl/x509v3.h> 67 #include <openssl/pem.h> 68 69 #undef PROG 70 #define PROG verify_main 71 72 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx); 73 static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose); 74 static STACK_OF(X509) *load_untrusted(char *file); 75 static int v_verbose=0, issuer_checks = 0; 76 77 int MAIN(int, char **); 78 79 int MAIN(int argc, char **argv) 80 { 81 int i,ret=1; 82 int purpose = -1; 83 char *CApath=NULL,*CAfile=NULL; 84 char *untfile = NULL, *trustfile = NULL; 85 STACK_OF(X509) *untrusted = NULL, *trusted = NULL; 86 X509_STORE *cert_ctx=NULL; 87 X509_LOOKUP *lookup=NULL; 88 89 cert_ctx=X509_STORE_new(); 90 if (cert_ctx == NULL) goto end; 91 X509_STORE_set_verify_cb_func(cert_ctx,cb); 92 93 ERR_load_crypto_strings(); 94 95 apps_startup(); 96 97 if (bio_err == NULL) 98 if ((bio_err=BIO_new(BIO_s_file())) != NULL) 99 BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT); 100 101 argc--; 102 argv++; 103 for (;;) 104 { 105 if (argc >= 1) 106 { 107 if (strcmp(*argv,"-CApath") == 0) 108 { 109 if (argc-- < 1) goto end; 110 CApath= *(++argv); 111 } 112 else if (strcmp(*argv,"-CAfile") == 0) 113 { 114 if (argc-- < 1) goto end; 115 CAfile= *(++argv); 116 } 117 else if (strcmp(*argv,"-purpose") == 0) 118 { 119 X509_PURPOSE *xptmp; 120 if (argc-- < 1) goto end; 121 i = X509_PURPOSE_get_by_sname(*(++argv)); 122 if(i < 0) 123 { 124 BIO_printf(bio_err, "unrecognized purpose\n"); 125 goto end; 126 } 127 xptmp = X509_PURPOSE_get0(i); 128 purpose = X509_PURPOSE_get_id(xptmp); 129 } 130 else if (strcmp(*argv,"-untrusted") == 0) 131 { 132 if (argc-- < 1) goto end; 133 untfile= *(++argv); 134 } 135 else if (strcmp(*argv,"-trusted") == 0) 136 { 137 if (argc-- < 1) goto end; 138 trustfile= *(++argv); 139 } 140 else if (strcmp(*argv,"-help") == 0) 141 goto end; 142 else if (strcmp(*argv,"-issuer_checks") == 0) 143 issuer_checks=1; 144 else if (strcmp(*argv,"-verbose") == 0) 145 v_verbose=1; 146 else if (argv[0][0] == '-') 147 goto end; 148 else 149 break; 150 argc--; 151 argv++; 152 } 153 else 154 break; 155 } 156 157 lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_file()); 158 if (lookup == NULL) abort(); 159 if (CAfile) { 160 i=X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM); 161 if(!i) { 162 BIO_printf(bio_err, "Error loading file %s\n", CAfile); 163 ERR_print_errors(bio_err); 164 goto end; 165 } 166 } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT); 167 168 lookup=X509_STORE_add_lookup(cert_ctx,X509_LOOKUP_hash_dir()); 169 if (lookup == NULL) abort(); 170 if (CApath) { 171 i=X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM); 172 if(!i) { 173 BIO_printf(bio_err, "Error loading directory %s\n", CApath); 174 ERR_print_errors(bio_err); 175 goto end; 176 } 177 } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT); 178 179 ERR_clear_error(); 180 181 if(untfile) { 182 if(!(untrusted = load_untrusted(untfile))) { 183 BIO_printf(bio_err, "Error loading untrusted file %s\n", untfile); 184 ERR_print_errors(bio_err); 185 goto end; 186 } 187 } 188 189 if(trustfile) { 190 if(!(trusted = load_untrusted(trustfile))) { 191 BIO_printf(bio_err, "Error loading untrusted file %s\n", trustfile); 192 ERR_print_errors(bio_err); 193 goto end; 194 } 195 } 196 197 if (argc < 1) check(cert_ctx, NULL, untrusted, trusted, purpose); 198 else 199 for (i=0; i<argc; i++) 200 check(cert_ctx,argv[i], untrusted, trusted, purpose); 201 ret=0; 202 end: 203 if (ret == 1) { 204 BIO_printf(bio_err,"usage: verify [-verbose] [-CApath path] [-CAfile file] [-purpose purpose] cert1 cert2 ...\n"); 205 BIO_printf(bio_err,"recognized usages:\n"); 206 for(i = 0; i < X509_PURPOSE_get_count(); i++) { 207 X509_PURPOSE *ptmp; 208 ptmp = X509_PURPOSE_get0(i); 209 BIO_printf(bio_err, "\t%-10s\t%s\n", X509_PURPOSE_get0_sname(ptmp), 210 X509_PURPOSE_get0_name(ptmp)); 211 } 212 } 213 if (cert_ctx != NULL) X509_STORE_free(cert_ctx); 214 sk_X509_pop_free(untrusted, X509_free); 215 sk_X509_pop_free(trusted, X509_free); 216 EXIT(ret); 217 } 218 219 static int check(X509_STORE *ctx, char *file, STACK_OF(X509) *uchain, STACK_OF(X509) *tchain, int purpose) 220 { 221 X509 *x=NULL; 222 BIO *in=NULL; 223 int i=0,ret=0; 224 X509_STORE_CTX *csc; 225 226 in=BIO_new(BIO_s_file()); 227 if (in == NULL) 228 { 229 ERR_print_errors(bio_err); 230 goto end; 231 } 232 233 if (file == NULL) 234 BIO_set_fp(in,stdin,BIO_NOCLOSE); 235 else 236 { 237 if (BIO_read_filename(in,file) <= 0) 238 { 239 perror(file); 240 goto end; 241 } 242 } 243 244 x=PEM_read_bio_X509(in,NULL,NULL,NULL); 245 if (x == NULL) 246 { 247 fprintf(stdout,"%s: unable to load certificate file\n", 248 (file == NULL)?"stdin":file); 249 ERR_print_errors(bio_err); 250 goto end; 251 } 252 fprintf(stdout,"%s: ",(file == NULL)?"stdin":file); 253 254 csc = X509_STORE_CTX_new(); 255 if (csc == NULL) 256 { 257 ERR_print_errors(bio_err); 258 goto end; 259 } 260 X509_STORE_CTX_init(csc,ctx,x,uchain); 261 if(tchain) X509_STORE_CTX_trusted_stack(csc, tchain); 262 if(purpose >= 0) X509_STORE_CTX_set_purpose(csc, purpose); 263 if(issuer_checks) 264 X509_STORE_CTX_set_flags(csc, X509_V_FLAG_CB_ISSUER_CHECK); 265 i=X509_verify_cert(csc); 266 X509_STORE_CTX_free(csc); 267 268 ret=0; 269 end: 270 if (i) 271 { 272 fprintf(stdout,"OK\n"); 273 ret=1; 274 } 275 else 276 ERR_print_errors(bio_err); 277 if (x != NULL) X509_free(x); 278 if (in != NULL) BIO_free(in); 279 280 return(ret); 281 } 282 283 static STACK_OF(X509) *load_untrusted(char *certfile) 284 { 285 STACK_OF(X509_INFO) *sk=NULL; 286 STACK_OF(X509) *stack=NULL, *ret=NULL; 287 BIO *in=NULL; 288 X509_INFO *xi; 289 290 if(!(stack = sk_X509_new_null())) { 291 BIO_printf(bio_err,"memory allocation failure\n"); 292 goto end; 293 } 294 295 if(!(in=BIO_new_file(certfile, "r"))) { 296 BIO_printf(bio_err,"error opening the file, %s\n",certfile); 297 goto end; 298 } 299 300 /* This loads from a file, a stack of x509/crl/pkey sets */ 301 if(!(sk=PEM_X509_INFO_read_bio(in,NULL,NULL,NULL))) { 302 BIO_printf(bio_err,"error reading the file, %s\n",certfile); 303 goto end; 304 } 305 306 /* scan over it and pull out the certs */ 307 while (sk_X509_INFO_num(sk)) 308 { 309 xi=sk_X509_INFO_shift(sk); 310 if (xi->x509 != NULL) 311 { 312 sk_X509_push(stack,xi->x509); 313 xi->x509=NULL; 314 } 315 X509_INFO_free(xi); 316 } 317 if(!sk_X509_num(stack)) { 318 BIO_printf(bio_err,"no certificates in file, %s\n",certfile); 319 sk_X509_free(stack); 320 goto end; 321 } 322 ret=stack; 323 end: 324 BIO_free(in); 325 sk_X509_INFO_free(sk); 326 return(ret); 327 } 328 329 static int MS_CALLBACK cb(int ok, X509_STORE_CTX *ctx) 330 { 331 char buf[256]; 332 333 if (!ok) 334 { 335 X509_NAME_oneline( 336 X509_get_subject_name(ctx->current_cert),buf,256); 337 printf("%s\n",buf); 338 printf("error %d at %d depth lookup:%s\n",ctx->error, 339 ctx->error_depth, 340 X509_verify_cert_error_string(ctx->error)); 341 if (ctx->error == X509_V_ERR_CERT_HAS_EXPIRED) ok=1; 342 /* since we are just checking the certificates, it is 343 * ok if they are self signed. But we should still warn 344 * the user. 345 */ 346 if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1; 347 /* Continue after extension errors too */ 348 if (ctx->error == X509_V_ERR_INVALID_CA) ok=1; 349 if (ctx->error == X509_V_ERR_PATH_LENGTH_EXCEEDED) ok=1; 350 if (ctx->error == X509_V_ERR_INVALID_PURPOSE) ok=1; 351 if (ctx->error == X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT) ok=1; 352 } 353 if (!v_verbose) 354 ERR_clear_error(); 355 return(ok); 356 } 357 358