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/err.h>
69 #define PROG smime_main
70 static int save_certs(char *signerfile, STACK_OF(X509) *signers);
73 #define SMIME_ENCRYPT (1 | SMIME_OP)
74 #define SMIME_DECRYPT 2
75 #define SMIME_SIGN (3 | SMIME_OP)
76 #define SMIME_VERIFY 4
77 #define SMIME_PK7OUT 5
79 int MAIN(int, char **);
81 int MAIN(int argc, char **argv)
87 char *inmode = "r", *outmode = "w";
88 char *infile = NULL, *outfile = NULL;
89 char *signerfile = NULL, *recipfile = NULL;
90 char *certfile = NULL, *keyfile = NULL, *contfile=NULL;
91 const EVP_CIPHER *cipher = NULL;
93 X509_STORE *store = NULL;
94 X509 *cert = NULL, *recip = NULL, *signer = NULL;
96 STACK_OF(X509) *encerts = NULL, *other = NULL;
97 BIO *in = NULL, *out = NULL, *indata = NULL;
99 int flags = PKCS7_DETACHED, store_flags = 0;
100 char *to = NULL, *from = NULL, *subject = NULL;
101 char *CAfile = NULL, *CApath = NULL;
102 char *passargin = NULL, *passin = NULL;
105 int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
106 int keyform = FORMAT_PEM;
107 #ifndef OPENSSL_NO_ENGINE
117 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
118 BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);
120 if (!load_config(bio_err, NULL))
123 while (!badarg && *args && *args[0] == '-') {
124 if (!strcmp (*args, "-encrypt")) operation = SMIME_ENCRYPT;
125 else if (!strcmp (*args, "-decrypt")) operation = SMIME_DECRYPT;
126 else if (!strcmp (*args, "-sign")) operation = SMIME_SIGN;
127 else if (!strcmp (*args, "-verify")) operation = SMIME_VERIFY;
128 else if (!strcmp (*args, "-pk7out")) operation = SMIME_PK7OUT;
129 #ifndef OPENSSL_NO_DES
130 else if (!strcmp (*args, "-des3"))
131 cipher = EVP_des_ede3_cbc();
132 else if (!strcmp (*args, "-des"))
133 cipher = EVP_des_cbc();
135 #ifndef OPENSSL_NO_RC2
136 else if (!strcmp (*args, "-rc2-40"))
137 cipher = EVP_rc2_40_cbc();
138 else if (!strcmp (*args, "-rc2-128"))
139 cipher = EVP_rc2_cbc();
140 else if (!strcmp (*args, "-rc2-64"))
141 cipher = EVP_rc2_64_cbc();
143 #ifndef OPENSSL_NO_AES
144 else if (!strcmp(*args,"-aes128"))
145 cipher = EVP_aes_128_cbc();
146 else if (!strcmp(*args,"-aes192"))
147 cipher = EVP_aes_192_cbc();
148 else if (!strcmp(*args,"-aes256"))
149 cipher = EVP_aes_256_cbc();
151 else if (!strcmp (*args, "-text"))
153 else if (!strcmp (*args, "-nointern"))
154 flags |= PKCS7_NOINTERN;
155 else if (!strcmp (*args, "-noverify"))
156 flags |= PKCS7_NOVERIFY;
157 else if (!strcmp (*args, "-nochain"))
158 flags |= PKCS7_NOCHAIN;
159 else if (!strcmp (*args, "-nocerts"))
160 flags |= PKCS7_NOCERTS;
161 else if (!strcmp (*args, "-noattr"))
162 flags |= PKCS7_NOATTR;
163 else if (!strcmp (*args, "-nodetach"))
164 flags &= ~PKCS7_DETACHED;
165 else if (!strcmp (*args, "-nosmimecap"))
166 flags |= PKCS7_NOSMIMECAP;
167 else if (!strcmp (*args, "-binary"))
168 flags |= PKCS7_BINARY;
169 else if (!strcmp (*args, "-nosigs"))
170 flags |= PKCS7_NOSIGS;
171 else if (!strcmp (*args, "-crl_check"))
172 store_flags |= X509_V_FLAG_CRL_CHECK;
173 else if (!strcmp (*args, "-crl_check_all"))
174 store_flags |= X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL;
175 else if (!strcmp(*args,"-rand")) {
181 #ifndef OPENSSL_NO_ENGINE
182 } else if (!strcmp(*args,"-engine")) {
188 } else if (!strcmp(*args,"-passin")) {
193 } else if (!strcmp (*args, "-to")) {
198 } else if (!strcmp (*args, "-from")) {
203 } else if (!strcmp (*args, "-subject")) {
208 } else if (!strcmp (*args, "-signer")) {
213 } else if (!strcmp (*args, "-recip")) {
218 } else if (!strcmp (*args, "-inkey")) {
223 } else if (!strcmp (*args, "-keyform")) {
226 keyform = str2fmt(*args);
228 } else if (!strcmp (*args, "-certfile")) {
233 } else if (!strcmp (*args, "-CAfile")) {
238 } else if (!strcmp (*args, "-CApath")) {
243 } else if (!strcmp (*args, "-in")) {
248 } else if (!strcmp (*args, "-inform")) {
251 informat = str2fmt(*args);
253 } else if (!strcmp (*args, "-outform")) {
256 outformat = str2fmt(*args);
258 } else if (!strcmp (*args, "-out")) {
263 } else if (!strcmp (*args, "-content")) {
272 if(operation == SMIME_SIGN) {
274 BIO_printf(bio_err, "No signer certificate specified\n");
278 } else if(operation == SMIME_DECRYPT) {
280 BIO_printf(bio_err, "No recipient certificate and key specified\n");
283 } else if(operation == SMIME_ENCRYPT) {
285 BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
289 } else if(!operation) badarg = 1;
292 BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
293 BIO_printf (bio_err, "where options are\n");
294 BIO_printf (bio_err, "-encrypt encrypt message\n");
295 BIO_printf (bio_err, "-decrypt decrypt encrypted message\n");
296 BIO_printf (bio_err, "-sign sign message\n");
297 BIO_printf (bio_err, "-verify verify signed message\n");
298 BIO_printf (bio_err, "-pk7out output PKCS#7 structure\n");
299 #ifndef OPENSSL_NO_DES
300 BIO_printf (bio_err, "-des3 encrypt with triple DES\n");
301 BIO_printf (bio_err, "-des encrypt with DES\n");
303 #ifndef OPENSSL_NO_RC2
304 BIO_printf (bio_err, "-rc2-40 encrypt with RC2-40 (default)\n");
305 BIO_printf (bio_err, "-rc2-64 encrypt with RC2-64\n");
306 BIO_printf (bio_err, "-rc2-128 encrypt with RC2-128\n");
308 #ifndef OPENSSL_NO_AES
309 BIO_printf (bio_err, "-aes128, -aes192, -aes256\n");
310 BIO_printf (bio_err, " encrypt PEM output with cbc aes\n");
312 BIO_printf (bio_err, "-nointern don't search certificates in message for signer\n");
313 BIO_printf (bio_err, "-nosigs don't verify message signature\n");
314 BIO_printf (bio_err, "-noverify don't verify signers certificate\n");
315 BIO_printf (bio_err, "-nocerts don't include signers certificate when signing\n");
316 BIO_printf (bio_err, "-nodetach use opaque signing\n");
317 BIO_printf (bio_err, "-noattr don't include any signed attributes\n");
318 BIO_printf (bio_err, "-binary don't translate message to text\n");
319 BIO_printf (bio_err, "-certfile file other certificates file\n");
320 BIO_printf (bio_err, "-signer file signer certificate file\n");
321 BIO_printf (bio_err, "-recip file recipient certificate file for decryption\n");
322 BIO_printf (bio_err, "-in file input file\n");
323 BIO_printf (bio_err, "-inform arg input format SMIME (default), PEM or DER\n");
324 BIO_printf (bio_err, "-inkey file input private key (if not signer or recipient)\n");
325 BIO_printf (bio_err, "-keyform arg input private key format (PEM or ENGINE)\n");
326 BIO_printf (bio_err, "-out file output file\n");
327 BIO_printf (bio_err, "-outform arg output format SMIME (default), PEM or DER\n");
328 BIO_printf (bio_err, "-content file supply or override content for detached signature\n");
329 BIO_printf (bio_err, "-to addr to address\n");
330 BIO_printf (bio_err, "-from ad from address\n");
331 BIO_printf (bio_err, "-subject s subject\n");
332 BIO_printf (bio_err, "-text include or delete text MIME headers\n");
333 BIO_printf (bio_err, "-CApath dir trusted certificates directory\n");
334 BIO_printf (bio_err, "-CAfile file trusted certificates file\n");
335 BIO_printf (bio_err, "-crl_check check revocation status of signer's certificate using CRLs\n");
336 BIO_printf (bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
337 #ifndef OPENSSL_NO_ENGINE
338 BIO_printf (bio_err, "-engine e use engine e, possibly a hardware device.\n");
340 BIO_printf (bio_err, "-passin arg input file pass phrase source\n");
341 BIO_printf(bio_err, "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
342 BIO_printf(bio_err, " load the file (or the files in the directory) into\n");
343 BIO_printf(bio_err, " the random number generator\n");
344 BIO_printf (bio_err, "cert.pem recipient certificate(s) for encryption\n");
348 #ifndef OPENSSL_NO_ENGINE
349 e = setup_engine(bio_err, engine, 0);
352 if(!app_passwd(bio_err, passargin, NULL, &passin, NULL)) {
353 BIO_printf(bio_err, "Error getting password\n");
358 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
360 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
361 app_RAND_load_files(inrand));
366 if(operation != SMIME_SIGN) flags &= ~PKCS7_DETACHED;
368 if(operation & SMIME_OP) {
369 if(flags & PKCS7_BINARY) inmode = "rb";
370 if(outformat == FORMAT_ASN1) outmode = "wb";
372 if(flags & PKCS7_BINARY) outmode = "wb";
373 if(informat == FORMAT_ASN1) inmode = "rb";
376 if(operation == SMIME_ENCRYPT) {
378 #ifndef OPENSSL_NO_RC2
379 cipher = EVP_rc2_40_cbc();
381 BIO_printf(bio_err, "No cipher selected\n");
385 encerts = sk_X509_new_null();
387 if(!(cert = load_cert(bio_err,*args,FORMAT_PEM,
388 NULL, e, "recipient certificate file"))) {
389 #if 0 /* An appropriate message is already printed */
390 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);
394 sk_X509_push(encerts, cert);
400 if(signerfile && (operation == SMIME_SIGN)) {
401 if(!(signer = load_cert(bio_err,signerfile,FORMAT_PEM, NULL,
402 e, "signer certificate"))) {
403 #if 0 /* An appropri message has already been printed */
404 BIO_printf(bio_err, "Can't read signer certificate file %s\n", signerfile);
411 if(!(other = load_certs(bio_err,certfile,FORMAT_PEM, NULL,
412 e, "certificate file"))) {
413 #if 0 /* An appropriate message has already been printed */
414 BIO_printf(bio_err, "Can't read certificate file %s\n", certfile);
416 ERR_print_errors(bio_err);
421 if(recipfile && (operation == SMIME_DECRYPT)) {
422 if(!(recip = load_cert(bio_err,recipfile,FORMAT_PEM,NULL,
423 e, "recipient certificate file"))) {
424 #if 0 /* An appropriate message has alrady been printed */
425 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", recipfile);
427 ERR_print_errors(bio_err);
432 if(operation == SMIME_DECRYPT) {
433 if(!keyfile) keyfile = recipfile;
434 } else if(operation == SMIME_SIGN) {
435 if(!keyfile) keyfile = signerfile;
436 } else keyfile = NULL;
439 key = load_key(bio_err, keyfile, keyform, 0, passin, e,
447 if (!(in = BIO_new_file(infile, inmode))) {
449 "Can't open input file %s\n", infile);
452 } else in = BIO_new_fp(stdin, BIO_NOCLOSE);
455 if (!(out = BIO_new_file(outfile, outmode))) {
457 "Can't open output file %s\n", outfile);
461 out = BIO_new_fp(stdout, BIO_NOCLOSE);
462 #ifdef OPENSSL_SYS_VMS
464 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
465 out = BIO_push(tmpbio, out);
470 if(operation == SMIME_VERIFY) {
471 if(!(store = setup_verify(bio_err, CAfile, CApath))) goto end;
472 X509_STORE_set_flags(store, store_flags);
478 if(operation == SMIME_ENCRYPT) {
479 p7 = PKCS7_encrypt(encerts, in, cipher, flags);
480 } else if(operation == SMIME_SIGN) {
481 p7 = PKCS7_sign(signer, key, other, in, flags);
482 if (BIO_reset(in) != 0 && (flags & PKCS7_DETACHED)) {
483 BIO_printf(bio_err, "Can't rewind input file\n");
487 if(informat == FORMAT_SMIME)
488 p7 = SMIME_read_PKCS7(in, &indata);
489 else if(informat == FORMAT_PEM)
490 p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
491 else if(informat == FORMAT_ASN1)
492 p7 = d2i_PKCS7_bio(in, NULL);
494 BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
499 BIO_printf(bio_err, "Error reading S/MIME message\n");
504 if(!(indata = BIO_new_file(contfile, "rb"))) {
505 BIO_printf(bio_err, "Can't read content file %s\n", contfile);
512 BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
517 if(operation == SMIME_DECRYPT) {
518 if(!PKCS7_decrypt(p7, key, recip, out, flags)) {
519 BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
522 } else if(operation == SMIME_VERIFY) {
523 STACK_OF(X509) *signers;
524 if(PKCS7_verify(p7, other, store, indata, out, flags)) {
525 BIO_printf(bio_err, "Verification successful\n");
527 BIO_printf(bio_err, "Verification failure\n");
530 signers = PKCS7_get0_signers(p7, other, flags);
531 if(!save_certs(signerfile, signers)) {
532 BIO_printf(bio_err, "Error writing signers to %s\n",
537 sk_X509_free(signers);
538 } else if(operation == SMIME_PK7OUT) {
539 PEM_write_bio_PKCS7(out, p7);
541 if(to) BIO_printf(out, "To: %s\n", to);
542 if(from) BIO_printf(out, "From: %s\n", from);
543 if(subject) BIO_printf(out, "Subject: %s\n", subject);
544 if(outformat == FORMAT_SMIME)
545 SMIME_write_PKCS7(out, p7, in, flags);
546 else if(outformat == FORMAT_PEM)
547 PEM_write_bio_PKCS7(out,p7);
548 else if(outformat == FORMAT_ASN1)
549 i2d_PKCS7_bio(out,p7);
551 BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
558 app_RAND_write_file(NULL, bio_err);
559 if(ret) ERR_print_errors(bio_err);
560 sk_X509_pop_free(encerts, X509_free);
561 sk_X509_pop_free(other, X509_free);
562 X509_STORE_free(store);
571 if(passin) OPENSSL_free(passin);
575 static int save_certs(char *signerfile, STACK_OF(X509) *signers)
579 if(!signerfile) return 1;
580 tmp = BIO_new_file(signerfile, "w");
582 for(i = 0; i < sk_X509_num(signers); i++)
583 PEM_write_bio_X509(tmp, sk_X509_value(signers, i));