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 X509 *load_cert(char *file);
71 static EVP_PKEY *load_key(char *file, char *pass);
72 static STACK_OF(X509) *load_certs(char *file);
73 static X509_STORE *setup_verify(char *CAfile, char *CApath);
74 static int save_certs(char *signerfile, STACK_OF(X509) *signers);
77 #define SMIME_ENCRYPT (1 | SMIME_OP)
78 #define SMIME_DECRYPT 2
79 #define SMIME_SIGN (3 | SMIME_OP)
80 #define SMIME_VERIFY 4
81 #define SMIME_PK7OUT 5
83 int MAIN(int, char **);
85 int MAIN(int argc, char **argv)
90 char *inmode = "r", *outmode = "w";
91 char *infile = NULL, *outfile = NULL;
92 char *signerfile = NULL, *recipfile = NULL;
93 char *certfile = NULL, *keyfile = NULL;
94 EVP_CIPHER *cipher = NULL;
96 X509_STORE *store = NULL;
97 X509 *cert = NULL, *recip = NULL, *signer = NULL;
99 STACK_OF(X509) *encerts = NULL, *other = NULL;
100 BIO *in = NULL, *out = NULL, *indata = NULL;
102 int flags = PKCS7_DETACHED;
103 char *to = NULL, *from = NULL, *subject = NULL;
104 char *CAfile = NULL, *CApath = NULL, *passin = 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(*argv,"-passin")) {
149 if (--argc < 1) badarg = 1;
150 else passin= *(++argv);
151 } else if (!strcmp(*argv,"-envpassin")) {
152 if (--argc < 1) badarg = 1;
153 else if(!(passin= getenv(*(++argv)))) {
155 "Can't read environment variable %s\n",
159 } else if (!strcmp (*args, "-to")) {
164 } else if (!strcmp (*args, "-from")) {
169 } else if (!strcmp (*args, "-subject")) {
174 } else if (!strcmp (*args, "-signer")) {
179 } else if (!strcmp (*args, "-recip")) {
184 } else if (!strcmp (*args, "-inkey")) {
189 } else if (!strcmp (*args, "-certfile")) {
194 } else if (!strcmp (*args, "-CAfile")) {
199 } else if (!strcmp (*args, "-CApath")) {
204 } else if (!strcmp (*args, "-in")) {
209 } else if (!strcmp (*args, "-out")) {
218 if(operation == SMIME_SIGN) {
220 BIO_printf(bio_err, "No signer certificate specified\n");
223 } else if(operation == SMIME_DECRYPT) {
225 BIO_printf(bio_err, "No recipient certificate and key specified\n");
228 } else if(operation == SMIME_ENCRYPT) {
230 BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
233 } else if(!operation) badarg = 1;
236 BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
237 BIO_printf (bio_err, "where options are\n");
238 BIO_printf (bio_err, "-encrypt encrypt message\n");
239 BIO_printf (bio_err, "-decrypt decrypt encrypted message\n");
240 BIO_printf (bio_err, "-sign sign message\n");
241 BIO_printf (bio_err, "-verify verify signed message\n");
242 BIO_printf (bio_err, "-pk7out output PKCS#7 structure\n");
244 BIO_printf (bio_err, "-des3 encrypt with triple DES\n");
245 BIO_printf (bio_err, "-des encrypt with DES\n");
248 BIO_printf (bio_err, "-rc2-40 encrypt with RC2-40 (default)\n");
249 BIO_printf (bio_err, "-rc2-64 encrypt with RC2-64\n");
250 BIO_printf (bio_err, "-rc2-128 encrypt with RC2-128\n");
252 BIO_printf (bio_err, "-nointern don't search certificates in message for signer\n");
253 BIO_printf (bio_err, "-nosigs don't verify message signature\n");
254 BIO_printf (bio_err, "-noverify don't verify signers certificate\n");
255 BIO_printf (bio_err, "-nocerts don't include signers certificate when signing\n");
256 BIO_printf (bio_err, "-nodetach use opaque signing\n");
257 BIO_printf (bio_err, "-noattr don't include any signed attributes\n");
258 BIO_printf (bio_err, "-binary don't translate message to text\n");
259 BIO_printf (bio_err, "-certfile file other certificates file\n");
260 BIO_printf (bio_err, "-signer file signer certificate file\n");
261 BIO_printf (bio_err, "-recip file recipient certificate file for decryption\n");
262 BIO_printf (bio_err, "-in file input file\n");
263 BIO_printf (bio_err, "-inkey file input private key (if not signer or recipient)\n");
264 BIO_printf (bio_err, "-out file output file\n");
265 BIO_printf (bio_err, "-to addr to address\n");
266 BIO_printf (bio_err, "-from ad from address\n");
267 BIO_printf (bio_err, "-subject s subject\n");
268 BIO_printf (bio_err, "-text include or delete text MIME headers\n");
269 BIO_printf (bio_err, "-CApath dir trusted certificates directory\n");
270 BIO_printf (bio_err, "-CAfile file trusted certificates file\n");
271 BIO_printf (bio_err, "cert.pem recipient certificate(s) for encryption\n");
277 if(operation != SMIME_SIGN) flags &= ~PKCS7_DETACHED;
279 if(flags & PKCS7_BINARY) {
280 if(operation & SMIME_OP) inmode = "rb";
284 if(operation == SMIME_ENCRYPT) {
287 cipher = EVP_rc2_40_cbc();
289 BIO_printf(bio_err, "No cipher selected\n");
294 CRYPTO_push_info("load encryption certificates");
296 encerts = sk_X509_new_null();
298 if(!(cert = load_cert(*args))) {
299 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);
302 sk_X509_push(encerts, cert);
311 if(signerfile && (operation == SMIME_SIGN)) {
313 CRYPTO_push_info("load signer certificate");
315 if(!(signer = load_cert(signerfile))) {
316 BIO_printf(bio_err, "Can't read signer certificate file %s\n", signerfile);
326 CRYPTO_push_info("load other certfiles");
328 if(!(other = load_certs(certfile))) {
329 BIO_printf(bio_err, "Can't read certificate file %s\n", certfile);
330 ERR_print_errors(bio_err);
338 if(recipfile && (operation == SMIME_DECRYPT)) {
340 CRYPTO_push_info("load recipient certificate");
342 if(!(recip = load_cert(recipfile))) {
343 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", recipfile);
344 ERR_print_errors(bio_err);
352 if(operation == SMIME_DECRYPT) {
353 if(!keyfile) keyfile = recipfile;
354 } else if(operation == SMIME_SIGN) {
355 if(!keyfile) keyfile = signerfile;
356 } else keyfile = NULL;
360 CRYPTO_push_info("load keyfile");
362 if(!(key = load_key(keyfile, passin))) {
363 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", keyfile);
364 ERR_print_errors(bio_err);
373 CRYPTO_push_info("open input files");
376 if (!(in = BIO_new_file(infile, inmode))) {
378 "Can't open input file %s\n", infile);
381 } else in = BIO_new_fp(stdin, BIO_NOCLOSE);
387 CRYPTO_push_info("open output files");
390 if (!(out = BIO_new_file(outfile, outmode))) {
392 "Can't open output file %s\n", outfile);
395 } else out = BIO_new_fp(stdout, BIO_NOCLOSE);
400 if(operation == SMIME_VERIFY) {
402 CRYPTO_push_info("setup_verify");
404 if(!(store = setup_verify(CAfile, CApath))) goto end;
412 if(operation == SMIME_ENCRYPT) {
414 CRYPTO_push_info("PKCS7_encrypt");
416 p7 = PKCS7_encrypt(encerts, in, cipher, flags);
420 } else if(operation == SMIME_SIGN) {
422 CRYPTO_push_info("PKCS7_sign");
424 p7 = PKCS7_sign(signer, key, other, in, flags);
431 CRYPTO_push_info("SMIME_read_PKCS7");
433 if(!(p7 = SMIME_read_PKCS7(in, &indata))) {
434 BIO_printf(bio_err, "Error reading S/MIME message\n");
443 BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
448 if(operation == SMIME_DECRYPT) {
450 CRYPTO_push_info("PKCS7_decrypt");
452 if(!PKCS7_decrypt(p7, key, recip, out, flags)) {
453 BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
459 } else if(operation == SMIME_VERIFY) {
460 STACK_OF(X509) *signers;
462 CRYPTO_push_info("PKCS7_verify");
464 if(PKCS7_verify(p7, other, store, indata, out, flags)) {
465 BIO_printf(bio_err, "Verification Successful\n");
467 BIO_printf(bio_err, "Verification Failure\n");
472 CRYPTO_push_info("PKCS7_iget_signers");
474 signers = PKCS7_iget_signers(p7, other, flags);
477 CRYPTO_push_info("save_certs");
479 if(!save_certs(signerfile, signers)) {
480 BIO_printf(bio_err, "Error writing signers to %s\n",
488 sk_X509_free(signers);
489 } else if(operation == SMIME_PK7OUT) {
490 PEM_write_bio_PKCS7(out, p7);
492 if(to) BIO_printf(out, "To: %s\n", to);
493 if(from) BIO_printf(out, "From: %s\n", from);
494 if(subject) BIO_printf(out, "Subject: %s\n", subject);
495 SMIME_write_PKCS7(out, p7, in, flags);
500 CRYPTO_remove_all_info();
502 if(ret) ERR_print_errors(bio_err);
503 sk_X509_pop_free(encerts, X509_free);
504 sk_X509_pop_free(other, X509_free);
505 X509_STORE_free(store);
517 static X509 *load_cert(char *file)
521 if(!(in = BIO_new_file(file, "r"))) return NULL;
522 cert = PEM_read_bio_X509(in, NULL, NULL,NULL);
527 static EVP_PKEY *load_key(char *file, char *pass)
531 if(!(in = BIO_new_file(file, "r"))) return NULL;
532 key = PEM_read_bio_PrivateKey(in, NULL,PEM_cb,pass);
537 static STACK_OF(X509) *load_certs(char *file)
541 STACK_OF(X509) *othercerts;
542 STACK_OF(X509_INFO) *allcerts;
544 if(!(in = BIO_new_file(file, "r"))) return NULL;
545 othercerts = sk_X509_new(NULL);
546 if(!othercerts) return NULL;
547 allcerts = PEM_X509_INFO_read_bio(in, NULL, NULL, NULL);
548 for(i = 0; i < sk_X509_INFO_num(allcerts); i++) {
549 xi = sk_X509_INFO_value (allcerts, i);
551 sk_X509_push(othercerts, xi->x509);
555 sk_X509_INFO_pop_free(allcerts, X509_INFO_free);
560 static X509_STORE *setup_verify(char *CAfile, char *CApath)
565 CRYPTO_push_info("X509_STORE_new");
567 if(!(store = X509_STORE_new())) goto end;
570 CRYPTO_push_info("X509_STORE_add_lookup(...file)");
572 lookup=X509_STORE_add_lookup(store,X509_LOOKUP_file());
573 if (lookup == NULL) goto end;
576 CRYPTO_push_info("X509_LOOKUP_load_file");
579 if(!X509_LOOKUP_load_file(lookup,CAfile,X509_FILETYPE_PEM)) {
580 BIO_printf(bio_err, "Error loading file %s\n", CAfile);
583 } else X509_LOOKUP_load_file(lookup,NULL,X509_FILETYPE_DEFAULT);
587 CRYPTO_push_info("X509_STORE_add_lookup(...hash_dir)");
589 lookup=X509_STORE_add_lookup(store,X509_LOOKUP_hash_dir());
590 if (lookup == NULL) goto end;
593 CRYPTO_push_info("X509_LOOKUP_add_dir");
596 if(!X509_LOOKUP_add_dir(lookup,CApath,X509_FILETYPE_PEM)) {
597 BIO_printf(bio_err, "Error loading directory %s\n", CApath);
600 } else X509_LOOKUP_add_dir(lookup,NULL,X509_FILETYPE_DEFAULT);
608 X509_STORE_free(store);
612 int save_certs(char *signerfile, STACK_OF(X509) *signers)
616 if(!signerfile) return 1;
617 tmp = BIO_new_file(signerfile, "w");
619 for(i = 0; i < sk_X509_num(signers); i++)
620 PEM_write_bio_X509(tmp, sk_X509_value(signers, i));