2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
20 * 3. All advertising materials mentioning features or use of this
21 * software must display the following acknowledgment:
22 * "This product includes software developed by the OpenSSL Project
23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 * endorse or promote products derived from this software without
27 * prior written permission. For written permission, please contact
28 * licensing@OpenSSL.org.
30 * 5. Products derived from this software may not be called "OpenSSL"
31 * nor may "OpenSSL" appear in their names without prior written
32 * permission of the OpenSSL Project.
34 * 6. Redistributions of any form whatsoever must retain the following
36 * "This product includes software developed by the OpenSSL Project
37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com). This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
59 /* S/MIME utility function */
64 #include <openssl/crypto.h>
65 #include <openssl/pem.h>
66 #include <openssl/rand.h>
67 #include <openssl/err.h>
70 #define PROG smime_main
71 static X509_STORE *setup_verify(char *CAfile, char *CApath);
72 static int save_certs(char *signerfile, STACK_OF(X509) *signers);
75 #define SMIME_ENCRYPT (1 | SMIME_OP)
76 #define SMIME_DECRYPT 2
77 #define SMIME_SIGN (3 | SMIME_OP)
78 #define SMIME_VERIFY 4
79 #define SMIME_PK7OUT 5
81 int MAIN(int, char **);
83 int MAIN(int argc, char **argv)
88 char *inmode = "r", *outmode = "w";
89 char *infile = NULL, *outfile = NULL;
90 char *signerfile = NULL, *recipfile = NULL;
91 char *certfile = NULL, *keyfile = NULL;
92 EVP_CIPHER *cipher = NULL;
94 X509_STORE *store = NULL;
95 X509 *cert = NULL, *recip = NULL, *signer = NULL;
97 STACK_OF(X509) *encerts = NULL, *other = NULL;
98 BIO *in = NULL, *out = NULL, *indata = NULL;
100 int flags = PKCS7_DETACHED;
101 char *to = NULL, *from = NULL, *subject = NULL;
102 char *CAfile = NULL, *CApath = NULL;
103 char *passargin = NULL, *passin = NULL;
104 char *inrand = NULL,*inegd=NULL;
110 while (!badarg && *args && *args[0] == '-') {
111 if (!strcmp (*args, "-encrypt")) operation = SMIME_ENCRYPT;
112 else if (!strcmp (*args, "-decrypt")) operation = SMIME_DECRYPT;
113 else if (!strcmp (*args, "-sign")) operation = SMIME_SIGN;
114 else if (!strcmp (*args, "-verify")) operation = SMIME_VERIFY;
115 else if (!strcmp (*args, "-pk7out")) operation = SMIME_PK7OUT;
117 else if (!strcmp (*args, "-des3"))
118 cipher = EVP_des_ede3_cbc();
119 else if (!strcmp (*args, "-des"))
120 cipher = EVP_des_cbc();
123 else if (!strcmp (*args, "-rc2-40"))
124 cipher = EVP_rc2_40_cbc();
125 else if (!strcmp (*args, "-rc2-128"))
126 cipher = EVP_rc2_cbc();
127 else if (!strcmp (*args, "-rc2-64"))
128 cipher = EVP_rc2_64_cbc();
130 else if (!strcmp (*args, "-text"))
132 else if (!strcmp (*args, "-nointern"))
133 flags |= PKCS7_NOINTERN;
134 else if (!strcmp (*args, "-noverify"))
135 flags |= PKCS7_NOVERIFY;
136 else if (!strcmp (*args, "-nochain"))
137 flags |= PKCS7_NOCHAIN;
138 else if (!strcmp (*args, "-nocerts"))
139 flags |= PKCS7_NOCERTS;
140 else if (!strcmp (*args, "-noattr"))
141 flags |= PKCS7_NOATTR;
142 else if (!strcmp (*args, "-nodetach"))
143 flags &= ~PKCS7_DETACHED;
144 else if (!strcmp (*args, "-binary"))
145 flags |= PKCS7_BINARY;
146 else if (!strcmp (*args, "-nosigs"))
147 flags |= PKCS7_NOSIGS;
148 else if (!strcmp(*args,"-rand")) {
154 } else if (!strcmp(*args,"-egd")) {
160 } else if (!strcmp(*args,"-passin")) {
165 } else if (!strcmp (*args, "-to")) {
170 } else if (!strcmp (*args, "-from")) {
175 } else if (!strcmp (*args, "-subject")) {
180 } else if (!strcmp (*args, "-signer")) {
185 } else if (!strcmp (*args, "-recip")) {
190 } else if (!strcmp (*args, "-inkey")) {
195 } else if (!strcmp (*args, "-certfile")) {
200 } else if (!strcmp (*args, "-CAfile")) {
205 } else if (!strcmp (*args, "-CApath")) {
210 } else if (!strcmp (*args, "-in")) {
215 } else if (!strcmp (*args, "-out")) {
224 if(operation == SMIME_SIGN) {
226 BIO_printf(bio_err, "No signer certificate specified\n");
230 } else if(operation == SMIME_DECRYPT) {
232 BIO_printf(bio_err, "No recipient certificate and key specified\n");
235 } else if(operation == SMIME_ENCRYPT) {
237 BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
241 } else if(!operation) badarg = 1;
244 BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
245 BIO_printf (bio_err, "where options are\n");
246 BIO_printf (bio_err, "-encrypt encrypt message\n");
247 BIO_printf (bio_err, "-decrypt decrypt encrypted message\n");
248 BIO_printf (bio_err, "-sign sign message\n");
249 BIO_printf (bio_err, "-verify verify signed message\n");
250 BIO_printf (bio_err, "-pk7out output PKCS#7 structure\n");
252 BIO_printf (bio_err, "-des3 encrypt with triple DES\n");
253 BIO_printf (bio_err, "-des encrypt with DES\n");
256 BIO_printf (bio_err, "-rc2-40 encrypt with RC2-40 (default)\n");
257 BIO_printf (bio_err, "-rc2-64 encrypt with RC2-64\n");
258 BIO_printf (bio_err, "-rc2-128 encrypt with RC2-128\n");
260 BIO_printf (bio_err, "-nointern don't search certificates in message for signer\n");
261 BIO_printf (bio_err, "-nosigs don't verify message signature\n");
262 BIO_printf (bio_err, "-noverify don't verify signers certificate\n");
263 BIO_printf (bio_err, "-nocerts don't include signers certificate when signing\n");
264 BIO_printf (bio_err, "-nodetach use opaque signing\n");
265 BIO_printf (bio_err, "-noattr don't include any signed attributes\n");
266 BIO_printf (bio_err, "-binary don't translate message to text\n");
267 BIO_printf (bio_err, "-certfile file other certificates file\n");
268 BIO_printf (bio_err, "-signer file signer certificate file\n");
269 BIO_printf (bio_err, "-recip file recipient certificate file for decryption\n");
270 BIO_printf (bio_err, "-in file input file\n");
271 BIO_printf (bio_err, "-inkey file input private key (if not signer or recipient)\n");
272 BIO_printf (bio_err, "-out file output file\n");
273 BIO_printf (bio_err, "-to addr to address\n");
274 BIO_printf (bio_err, "-from ad from address\n");
275 BIO_printf (bio_err, "-subject s subject\n");
276 BIO_printf (bio_err, "-text include or delete text MIME headers\n");
277 BIO_printf (bio_err, "-CApath dir trusted certificates directory\n");
278 BIO_printf (bio_err, "-CAfile file trusted certificates file\n");
279 BIO_printf(bio_err, "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
280 BIO_printf(bio_err, " load the file (or the files in the directory) into\n");
281 BIO_printf(bio_err, " the random number generator\n");
282 BIO_printf(bio_err, "-egd file load random seed from EGD socket\n");
283 BIO_printf (bio_err, "cert.pem recipient certificate(s) for encryption\n");
287 if(!app_passwd(bio_err, passargin, NULL, &passin, NULL)) {
288 BIO_printf(bio_err, "Error getting password\n");
293 app_RAND_load_file(NULL, bio_err, (inrand != NULL || inegd != NULL));
295 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
296 app_RAND_load_files(inrand));
298 BIO_printf(bio_err,"%ld egd bytes loaded\n",
304 if(operation != SMIME_SIGN) flags &= ~PKCS7_DETACHED;
306 if(flags & PKCS7_BINARY) {
307 if(operation & SMIME_OP) inmode = "rb";
311 if(operation == SMIME_ENCRYPT) {
314 cipher = EVP_rc2_40_cbc();
316 BIO_printf(bio_err, "No cipher selected\n");
320 encerts = sk_X509_new_null();
322 if(!(cert = load_cert(bio_err,*args,FORMAT_PEM))) {
323 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);
326 sk_X509_push(encerts, cert);
332 if(signerfile && (operation == SMIME_SIGN)) {
333 if(!(signer = load_cert(bio_err,signerfile,FORMAT_PEM))) {
334 BIO_printf(bio_err, "Can't read signer certificate file %s\n", signerfile);
340 if(!(other = load_certs(bio_err,certfile,FORMAT_PEM))) {
341 BIO_printf(bio_err, "Can't read certificate file %s\n", certfile);
342 ERR_print_errors(bio_err);
347 if(recipfile && (operation == SMIME_DECRYPT)) {
348 if(!(recip = load_cert(bio_err,recipfile,FORMAT_PEM))) {
349 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", recipfile);
350 ERR_print_errors(bio_err);
355 if(operation == SMIME_DECRYPT) {
356 if(!keyfile) keyfile = recipfile;
357 } else if(operation == SMIME_SIGN) {
358 if(!keyfile) keyfile = signerfile;
359 } else keyfile = NULL;
362 if(!(key = load_key(bio_err,keyfile, FORMAT_PEM, passin))) {
363 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", keyfile);
364 ERR_print_errors(bio_err);
370 if (!(in = BIO_new_file(infile, inmode))) {
372 "Can't open input file %s\n", infile);
375 } else in = BIO_new_fp(stdin, BIO_NOCLOSE);
378 if (!(out = BIO_new_file(outfile, outmode))) {
380 "Can't open output file %s\n", outfile);
383 } else out = BIO_new_fp(stdout, BIO_NOCLOSE);
385 if(operation == SMIME_VERIFY) {
386 if(!(store = setup_verify(CAfile, CApath))) goto end;
391 if(operation == SMIME_ENCRYPT) {
392 p7 = PKCS7_encrypt(encerts, in, cipher, flags);
393 } else if(operation == SMIME_SIGN) {
394 p7 = PKCS7_sign(signer, key, other, in, flags);
397 if(!(p7 = SMIME_read_PKCS7(in, &indata))) {
398 BIO_printf(bio_err, "Error reading S/MIME message\n");
404 BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
409 if(operation == SMIME_DECRYPT) {
410 if(!PKCS7_decrypt(p7, key, recip, out, flags)) {
411 BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
414 } else if(operation == SMIME_VERIFY) {
415 STACK_OF(X509) *signers;
416 if(PKCS7_verify(p7, other, store, indata, out, flags)) {
417 BIO_printf(bio_err, "Verification Successful\n");
419 BIO_printf(bio_err, "Verification Failure\n");
422 signers = PKCS7_get0_signers(p7, other, flags);
423 if(!save_certs(signerfile, signers)) {
424 BIO_printf(bio_err, "Error writing signers to %s\n",
429 sk_X509_free(signers);
430 } else if(operation == SMIME_PK7OUT) {
431 PEM_write_bio_PKCS7(out, p7);
433 if(to) BIO_printf(out, "To: %s\n", to);
434 if(from) BIO_printf(out, "From: %s\n", from);
435 if(subject) BIO_printf(out, "Subject: %s\n", subject);
436 SMIME_write_PKCS7(out, p7, in, flags);
441 app_RAND_write_file(NULL, bio_err);
442 if(ret) ERR_print_errors(bio_err);
443 sk_X509_pop_free(encerts, X509_free);
444 sk_X509_pop_free(other, X509_free);
445 X509_STORE_free(store);
454 if(passin) OPENSSL_free(passin);
458 static X509_STORE *setup_verify(char *CAfile, char *CApath)
462 if(!(store = X509_STORE_new())) goto end;
463 lookup=X509_STORE_add_lookup(store,X509_LOOKUP_file());
464 if (lookup == NULL) goto end;
466 if(!X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM)) {
467 BIO_printf(bio_err, "Error loading file %s\n", CAfile);
470 } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
472 lookup=X509_STORE_add_lookup(store,X509_LOOKUP_hash_dir());
473 if (lookup == NULL) goto end;
475 if(!X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM)) {
476 BIO_printf(bio_err, "Error loading directory %s\n", CApath);
479 } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
484 X509_STORE_free(store);
488 static int save_certs(char *signerfile, STACK_OF(X509) *signers)
492 if(!signerfile) return 1;
493 tmp = BIO_new_file(signerfile, "w");
495 for(i = 0; i < sk_X509_num(signers); i++)
496 PEM_write_bio_X509(tmp, sk_X509_value(signers, i));