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
);