2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
5 /* ====================================================================
6 * Copyright (c) 1999-2004 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>
67 #include <openssl/x509_vfy.h>
68 #include <openssl/x509v3.h>
71 #define PROG smime_main
72 static int save_certs(char *signerfile, STACK_OF(X509) *signers);
73 static int smime_cb(int ok, X509_STORE_CTX *ctx);
77 #define SMIME_SIGNERS 0x40
78 #define SMIME_ENCRYPT (1 | SMIME_OP)
79 #define SMIME_DECRYPT (2 | SMIME_IP)
80 #define SMIME_SIGN (3 | SMIME_OP | SMIME_SIGNERS)
81 #define SMIME_VERIFY (4 | SMIME_IP)
82 #define SMIME_PK7OUT (5 | SMIME_IP | SMIME_OP)
83 #define SMIME_RESIGN (6 | SMIME_IP | SMIME_OP | SMIME_SIGNERS)
85 int MAIN(int, char **);
87 int MAIN(int argc, char **argv)
93 const char *inmode = "r", *outmode = "w";
94 char *infile = NULL, *outfile = NULL;
95 char *signerfile = NULL, *recipfile = NULL;
96 STACK *sksigners = NULL, *skkeys = NULL;
97 char *certfile = NULL, *keyfile = NULL, *contfile=NULL;
98 const EVP_CIPHER *cipher = NULL;
100 X509_STORE *store = NULL;
101 X509 *cert = NULL, *recip = NULL, *signer = NULL;
102 EVP_PKEY *key = NULL;
103 STACK_OF(X509) *encerts = NULL, *other = NULL;
104 BIO *in = NULL, *out = NULL, *indata = NULL;
106 int flags = PKCS7_DETACHED;
107 char *to = NULL, *from = NULL, *subject = NULL;
108 char *CAfile = NULL, *CApath = NULL;
109 char *passargin = NULL, *passin = NULL;
112 const EVP_MD *sign_md = NULL;
113 int informat = FORMAT_SMIME, outformat = FORMAT_SMIME;
114 int keyform = FORMAT_PEM;
115 #ifndef OPENSSL_NO_ENGINE
119 X509_VERIFY_PARAM *vpm = NULL;
128 if ((bio_err = BIO_new(BIO_s_file())) != NULL)
129 BIO_set_fp(bio_err, stderr, BIO_NOCLOSE|BIO_FP_TEXT);
132 if (!load_config(bio_err, NULL))
135 while (!badarg && *args && *args[0] == '-')
137 if (!strcmp (*args, "-encrypt"))
138 operation = SMIME_ENCRYPT;
139 else if (!strcmp (*args, "-decrypt"))
140 operation = SMIME_DECRYPT;
141 else if (!strcmp (*args, "-sign"))
142 operation = SMIME_SIGN;
143 else if (!strcmp (*args, "-resign"))
144 operation = SMIME_RESIGN;
145 else if (!strcmp (*args, "-verify"))
146 operation = SMIME_VERIFY;
147 else if (!strcmp (*args, "-pk7out"))
148 operation = SMIME_PK7OUT;
149 #ifndef OPENSSL_NO_DES
150 else if (!strcmp (*args, "-des3"))
151 cipher = EVP_des_ede3_cbc();
152 else if (!strcmp (*args, "-des"))
153 cipher = EVP_des_cbc();
155 #ifndef OPENSSL_NO_RC2
156 else if (!strcmp (*args, "-rc2-40"))
157 cipher = EVP_rc2_40_cbc();
158 else if (!strcmp (*args, "-rc2-128"))
159 cipher = EVP_rc2_cbc();
160 else if (!strcmp (*args, "-rc2-64"))
161 cipher = EVP_rc2_64_cbc();
163 #ifndef OPENSSL_NO_AES
164 else if (!strcmp(*args,"-aes128"))
165 cipher = EVP_aes_128_cbc();
166 else if (!strcmp(*args,"-aes192"))
167 cipher = EVP_aes_192_cbc();
168 else if (!strcmp(*args,"-aes256"))
169 cipher = EVP_aes_256_cbc();
171 #ifndef OPENSSL_NO_CAMELLIA
172 else if (!strcmp(*args,"-camellia128"))
173 cipher = EVP_camellia_128_cbc();
174 else if (!strcmp(*args,"-camellia192"))
175 cipher = EVP_camellia_192_cbc();
176 else if (!strcmp(*args,"-camellia256"))
177 cipher = EVP_camellia_256_cbc();
179 else if (!strcmp (*args, "-text"))
181 else if (!strcmp (*args, "-nointern"))
182 flags |= PKCS7_NOINTERN;
183 else if (!strcmp (*args, "-noverify"))
184 flags |= PKCS7_NOVERIFY;
185 else if (!strcmp (*args, "-nochain"))
186 flags |= PKCS7_NOCHAIN;
187 else if (!strcmp (*args, "-nocerts"))
188 flags |= PKCS7_NOCERTS;
189 else if (!strcmp (*args, "-noattr"))
190 flags |= PKCS7_NOATTR;
191 else if (!strcmp (*args, "-nodetach"))
192 flags &= ~PKCS7_DETACHED;
193 else if (!strcmp (*args, "-nosmimecap"))
194 flags |= PKCS7_NOSMIMECAP;
195 else if (!strcmp (*args, "-binary"))
196 flags |= PKCS7_BINARY;
197 else if (!strcmp (*args, "-nosigs"))
198 flags |= PKCS7_NOSIGS;
199 else if (!strcmp (*args, "-nooldmime"))
200 flags |= PKCS7_NOOLDMIMETYPE;
201 else if (!strcmp (*args, "-crlfeol"))
202 flags |= PKCS7_CRLFEOL;
203 else if (!strcmp(*args,"-rand"))
211 #ifndef OPENSSL_NO_ENGINE
212 else if (!strcmp(*args,"-engine"))
219 else if (!strcmp(*args,"-passin"))
225 else if (!strcmp (*args, "-to"))
231 else if (!strcmp (*args, "-from"))
237 else if (!strcmp (*args, "-subject"))
243 else if (!strcmp (*args, "-signer"))
247 /* If previous -signer argument add signer to list */
252 sksigners = sk_new_null();
253 sk_push(sksigners, signerfile);
255 keyfile = signerfile;
257 skkeys = sk_new_null();
258 sk_push(skkeys, keyfile);
261 signerfile = *++args;
263 else if (!strcmp (*args, "-recip"))
269 else if (!strcmp (*args, "-md"))
273 sign_md = EVP_get_digestbyname(*++args);
276 BIO_printf(bio_err, "Unknown digest %s\n",
281 else if (!strcmp (*args, "-inkey"))
285 /* If previous -inkey arument add signer to list */
290 BIO_puts(bio_err, "Illegal -inkey without -signer\n");
294 sksigners = sk_new_null();
295 sk_push(sksigners, signerfile);
298 skkeys = sk_new_null();
299 sk_push(skkeys, keyfile);
303 else if (!strcmp (*args, "-keyform"))
307 keyform = str2fmt(*++args);
309 else if (!strcmp (*args, "-certfile"))
315 else if (!strcmp (*args, "-CAfile"))
321 else if (!strcmp (*args, "-CApath"))
327 else if (!strcmp (*args, "-in"))
333 else if (!strcmp (*args, "-inform"))
337 informat = str2fmt(*++args);
339 else if (!strcmp (*args, "-outform"))
343 outformat = str2fmt(*++args);
345 else if (!strcmp (*args, "-out"))
351 else if (!strcmp (*args, "-content"))
357 else if (args_verify(&args, NULL, &badarg, bio_err, &vpm))
359 else if ((cipher = EVP_get_cipherbyname(*args + 1)) == NULL)
364 if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners))
366 BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
370 if (operation & SMIME_SIGNERS)
372 /* Check to see if any final signer needs to be appended */
373 if (keyfile && !signerfile)
375 BIO_puts(bio_err, "Illegal -inkey without -signer\n");
381 sksigners = sk_new_null();
382 sk_push(sksigners, signerfile);
384 skkeys = sk_new_null();
386 keyfile = signerfile;
387 sk_push(skkeys, keyfile);
391 BIO_printf(bio_err, "No signer certificate specified\n");
398 else if (operation == SMIME_DECRYPT)
400 if (!recipfile && !keyfile)
402 BIO_printf(bio_err, "No recipient certificate or key specified\n");
406 else if (operation == SMIME_ENCRYPT)
410 BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
421 BIO_printf (bio_err, "Usage smime [options] cert.pem ...\n");
422 BIO_printf (bio_err, "where options are\n");
423 BIO_printf (bio_err, "-encrypt encrypt message\n");
424 BIO_printf (bio_err, "-decrypt decrypt encrypted message\n");
425 BIO_printf (bio_err, "-sign sign message\n");
426 BIO_printf (bio_err, "-verify verify signed message\n");
427 BIO_printf (bio_err, "-pk7out output PKCS#7 structure\n");
428 #ifndef OPENSSL_NO_DES
429 BIO_printf (bio_err, "-des3 encrypt with triple DES\n");
430 BIO_printf (bio_err, "-des encrypt with DES\n");
432 #ifndef OPENSSL_NO_RC2
433 BIO_printf (bio_err, "-rc2-40 encrypt with RC2-40 (default)\n");
434 BIO_printf (bio_err, "-rc2-64 encrypt with RC2-64\n");
435 BIO_printf (bio_err, "-rc2-128 encrypt with RC2-128\n");
437 #ifndef OPENSSL_NO_AES
438 BIO_printf (bio_err, "-aes128, -aes192, -aes256\n");
439 BIO_printf (bio_err, " encrypt PEM output with cbc aes\n");
441 #ifndef OPENSSL_NO_CAMELLIA
442 BIO_printf (bio_err, "-camellia128, -camellia192, -camellia256\n");
443 BIO_printf (bio_err, " encrypt PEM output with cbc camellia\n");
445 BIO_printf (bio_err, "-nointern don't search certificates in message for signer\n");
446 BIO_printf (bio_err, "-nosigs don't verify message signature\n");
447 BIO_printf (bio_err, "-noverify don't verify signers certificate\n");
448 BIO_printf (bio_err, "-nocerts don't include signers certificate when signing\n");
449 BIO_printf (bio_err, "-nodetach use opaque signing\n");
450 BIO_printf (bio_err, "-noattr don't include any signed attributes\n");
451 BIO_printf (bio_err, "-binary don't translate message to text\n");
452 BIO_printf (bio_err, "-certfile file other certificates file\n");
453 BIO_printf (bio_err, "-signer file signer certificate file\n");
454 BIO_printf (bio_err, "-recip file recipient certificate file for decryption\n");
455 BIO_printf (bio_err, "-in file input file\n");
456 BIO_printf (bio_err, "-inform arg input format SMIME (default), PEM or DER\n");
457 BIO_printf (bio_err, "-inkey file input private key (if not signer or recipient)\n");
458 BIO_printf (bio_err, "-keyform arg input private key format (PEM or ENGINE)\n");
459 BIO_printf (bio_err, "-out file output file\n");
460 BIO_printf (bio_err, "-outform arg output format SMIME (default), PEM or DER\n");
461 BIO_printf (bio_err, "-content file supply or override content for detached signature\n");
462 BIO_printf (bio_err, "-to addr to address\n");
463 BIO_printf (bio_err, "-from ad from address\n");
464 BIO_printf (bio_err, "-subject s subject\n");
465 BIO_printf (bio_err, "-text include or delete text MIME headers\n");
466 BIO_printf (bio_err, "-CApath dir trusted certificates directory\n");
467 BIO_printf (bio_err, "-CAfile file trusted certificates file\n");
468 BIO_printf (bio_err, "-crl_check check revocation status of signer's certificate using CRLs\n");
469 BIO_printf (bio_err, "-crl_check_all check revocation status of signer's certificate chain using CRLs\n");
470 #ifndef OPENSSL_NO_ENGINE
471 BIO_printf (bio_err, "-engine e use engine e, possibly a hardware device.\n");
473 BIO_printf (bio_err, "-passin arg input file pass phrase source\n");
474 BIO_printf(bio_err, "-rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
475 BIO_printf(bio_err, " load the file (or the files in the directory) into\n");
476 BIO_printf(bio_err, " the random number generator\n");
477 BIO_printf (bio_err, "cert.pem recipient certificate(s) for encryption\n");
481 #ifndef OPENSSL_NO_ENGINE
482 e = setup_engine(bio_err, engine, 0);
485 if (!app_passwd(bio_err, passargin, NULL, &passin, NULL))
487 BIO_printf(bio_err, "Error getting password\n");
493 app_RAND_load_file(NULL, bio_err, (inrand != NULL));
495 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
496 app_RAND_load_files(inrand));
501 if (!(operation & SMIME_SIGNERS))
502 flags &= ~PKCS7_DETACHED;
504 if (operation & SMIME_OP)
506 if (outformat == FORMAT_ASN1)
511 if (flags & PKCS7_BINARY)
515 if (operation & SMIME_IP)
517 if (informat == FORMAT_ASN1)
522 if (flags & PKCS7_BINARY)
526 if (operation == SMIME_ENCRYPT)
530 #ifndef OPENSSL_NO_RC2
531 cipher = EVP_rc2_40_cbc();
533 BIO_printf(bio_err, "No cipher selected\n");
537 encerts = sk_X509_new_null();
540 if (!(cert = load_cert(bio_err,*args,FORMAT_PEM,
541 NULL, e, "recipient certificate file")))
543 #if 0 /* An appropriate message is already printed */
544 BIO_printf(bio_err, "Can't read recipient certificate file %s\n", *args);
548 sk_X509_push(encerts, cert);
556 if (!(other = load_certs(bio_err,certfile,FORMAT_PEM, NULL,
557 e, "certificate file")))
559 ERR_print_errors(bio_err);
564 if (recipfile && (operation == SMIME_DECRYPT))
566 if (!(recip = load_cert(bio_err,recipfile,FORMAT_PEM,NULL,
567 e, "recipient certificate file")))
569 ERR_print_errors(bio_err);
574 if (operation == SMIME_DECRYPT)
579 else if (operation == SMIME_SIGN)
582 keyfile = signerfile;
588 key = load_key(bio_err, keyfile, keyform, 0, passin, e,
596 if (!(in = BIO_new_file(infile, inmode)))
599 "Can't open input file %s\n", infile);
604 in = BIO_new_fp(stdin, BIO_NOCLOSE);
606 if (operation & SMIME_IP)
608 if (informat == FORMAT_SMIME)
609 p7 = SMIME_read_PKCS7(in, &indata);
610 else if (informat == FORMAT_PEM)
611 p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
612 else if (informat == FORMAT_ASN1)
613 p7 = d2i_PKCS7_bio(in, NULL);
616 BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
622 BIO_printf(bio_err, "Error reading S/MIME message\n");
628 if (!(indata = BIO_new_file(contfile, "rb")))
630 BIO_printf(bio_err, "Can't read content file %s\n", contfile);
638 if (!(out = BIO_new_file(outfile, outmode)))
641 "Can't open output file %s\n", outfile);
647 out = BIO_new_fp(stdout, BIO_NOCLOSE);
648 #ifdef OPENSSL_SYS_VMS
650 BIO *tmpbio = BIO_new(BIO_f_linebuffer());
651 out = BIO_push(tmpbio, out);
656 if (operation == SMIME_VERIFY)
658 if (!(store = setup_verify(bio_err, CAfile, CApath)))
660 X509_STORE_set_verify_cb_func(store, smime_cb);
662 X509_STORE_set1_param(store, vpm);
668 if (operation == SMIME_ENCRYPT)
669 p7 = PKCS7_encrypt(encerts, in, cipher, flags);
670 else if (operation & SMIME_SIGNERS)
673 /* If detached data and SMIME output enable partial
676 if (operation == SMIME_SIGN)
678 if ((flags & PKCS7_DETACHED)
679 && (outformat == FORMAT_SMIME))
680 flags |= PKCS7_STREAM;
681 flags |= PKCS7_PARTIAL;
682 p7 = PKCS7_sign(NULL, NULL, other, in, flags);
685 flags |= PKCS7_REUSE_DIGEST;
686 for (i = 0; i < sk_num(sksigners); i++)
688 signerfile = sk_value(sksigners, i);
689 keyfile = sk_value(skkeys, i);
690 signer = load_cert(bio_err, signerfile,FORMAT_PEM, NULL,
691 e, "signer certificate");
694 key = load_key(bio_err, keyfile, keyform, 0, passin, e,
698 if (!PKCS7_sign_add_signer(p7, signer, key,
706 /* If not streaming or resigning finalize structure */
707 if ((operation == SMIME_SIGN) && !(flags & PKCS7_STREAM))
709 if (!PKCS7_final(p7, in, flags))
711 if (BIO_reset(in) != 0)
713 BIO_puts(bio_err, "Can't rewind input file\n");
721 BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
726 if (operation == SMIME_DECRYPT)
728 if (!PKCS7_decrypt(p7, key, recip, out, flags))
730 BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
734 else if (operation == SMIME_VERIFY)
736 STACK_OF(X509) *signers;
737 if (PKCS7_verify(p7, other, store, indata, out, flags))
738 BIO_printf(bio_err, "Verification successful\n");
741 BIO_printf(bio_err, "Verification failure\n");
744 signers = PKCS7_get0_signers(p7, other, flags);
745 if (!save_certs(signerfile, signers))
747 BIO_printf(bio_err, "Error writing signers to %s\n",
752 sk_X509_free(signers);
754 else if (operation == SMIME_PK7OUT)
755 PEM_write_bio_PKCS7(out, p7);
759 BIO_printf(out, "To: %s\n", to);
761 BIO_printf(out, "From: %s\n", from);
763 BIO_printf(out, "Subject: %s\n", subject);
764 if (outformat == FORMAT_SMIME)
766 if (operation == SMIME_RESIGN)
767 SMIME_write_PKCS7(out, p7, indata, flags);
769 SMIME_write_PKCS7(out, p7, in, flags);
771 else if (outformat == FORMAT_PEM)
772 PEM_write_bio_PKCS7(out,p7);
773 else if (outformat == FORMAT_ASN1)
774 i2d_PKCS7_bio(out,p7);
777 BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
784 app_RAND_write_file(NULL, bio_err);
785 if (ret) ERR_print_errors(bio_err);
786 sk_X509_pop_free(encerts, X509_free);
787 sk_X509_pop_free(other, X509_free);
789 X509_VERIFY_PARAM_free(vpm);
794 X509_STORE_free(store);
803 if (passin) OPENSSL_free(passin);
807 static int save_certs(char *signerfile, STACK_OF(X509) *signers)
813 tmp = BIO_new_file(signerfile, "w");
815 for(i = 0; i < sk_X509_num(signers); i++)
816 PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
822 /* Minimal callback just to output policy info (if any) */
824 static int smime_cb(int ok, X509_STORE_CTX *ctx)
828 error = X509_STORE_CTX_get_error(ctx);
830 if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
831 && ((error != X509_V_OK) || (ok != 2)))
834 policies_print(NULL, ctx);