1 | /*
|
---|
2 | * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
|
---|
3 | *
|
---|
4 | * Licensed under the OpenSSL license (the "License"). You may not use
|
---|
5 | * this file except in compliance with the License. You can obtain a copy
|
---|
6 | * in the file LICENSE in the source distribution or at
|
---|
7 | * https://www.openssl.org/source/license.html
|
---|
8 | */
|
---|
9 |
|
---|
10 | /* S/MIME utility function */
|
---|
11 |
|
---|
12 | #include <stdio.h>
|
---|
13 | #include <string.h>
|
---|
14 | #include "apps.h"
|
---|
15 | #include <openssl/crypto.h>
|
---|
16 | #include <openssl/pem.h>
|
---|
17 | #include <openssl/err.h>
|
---|
18 | #include <openssl/x509_vfy.h>
|
---|
19 | #include <openssl/x509v3.h>
|
---|
20 |
|
---|
21 | static int save_certs(char *signerfile, STACK_OF(X509) *signers);
|
---|
22 | static int smime_cb(int ok, X509_STORE_CTX *ctx);
|
---|
23 |
|
---|
24 | #define SMIME_OP 0x10
|
---|
25 | #define SMIME_IP 0x20
|
---|
26 | #define SMIME_SIGNERS 0x40
|
---|
27 | #define SMIME_ENCRYPT (1 | SMIME_OP)
|
---|
28 | #define SMIME_DECRYPT (2 | SMIME_IP)
|
---|
29 | #define SMIME_SIGN (3 | SMIME_OP | SMIME_SIGNERS)
|
---|
30 | #define SMIME_VERIFY (4 | SMIME_IP)
|
---|
31 | #define SMIME_PK7OUT (5 | SMIME_IP | SMIME_OP)
|
---|
32 | #define SMIME_RESIGN (6 | SMIME_IP | SMIME_OP | SMIME_SIGNERS)
|
---|
33 |
|
---|
34 | typedef enum OPTION_choice {
|
---|
35 | OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
|
---|
36 | OPT_ENCRYPT, OPT_DECRYPT, OPT_SIGN, OPT_RESIGN, OPT_VERIFY,
|
---|
37 | OPT_PK7OUT, OPT_TEXT, OPT_NOINTERN, OPT_NOVERIFY, OPT_NOCHAIN,
|
---|
38 | OPT_NOCERTS, OPT_NOATTR, OPT_NODETACH, OPT_NOSMIMECAP,
|
---|
39 | OPT_BINARY, OPT_NOSIGS, OPT_STREAM, OPT_INDEF, OPT_NOINDEF,
|
---|
40 | OPT_CRLFEOL, OPT_RAND, OPT_ENGINE, OPT_PASSIN,
|
---|
41 | OPT_TO, OPT_FROM, OPT_SUBJECT, OPT_SIGNER, OPT_RECIP, OPT_MD,
|
---|
42 | OPT_CIPHER, OPT_INKEY, OPT_KEYFORM, OPT_CERTFILE, OPT_CAFILE,
|
---|
43 | OPT_V_ENUM,
|
---|
44 | OPT_CAPATH, OPT_NOCAFILE, OPT_NOCAPATH, OPT_IN, OPT_INFORM, OPT_OUT,
|
---|
45 | OPT_OUTFORM, OPT_CONTENT
|
---|
46 | } OPTION_CHOICE;
|
---|
47 |
|
---|
48 | OPTIONS smime_options[] = {
|
---|
49 | {OPT_HELP_STR, 1, '-', "Usage: %s [options] cert.pem...\n"},
|
---|
50 | {OPT_HELP_STR, 1, '-',
|
---|
51 | " cert.pem... recipient certs for encryption\n"},
|
---|
52 | {OPT_HELP_STR, 1, '-', "Valid options are:\n"},
|
---|
53 | {"help", OPT_HELP, '-', "Display this summary"},
|
---|
54 | {"encrypt", OPT_ENCRYPT, '-', "Encrypt message"},
|
---|
55 | {"decrypt", OPT_DECRYPT, '-', "Decrypt encrypted message"},
|
---|
56 | {"sign", OPT_SIGN, '-', "Sign message"},
|
---|
57 | {"verify", OPT_VERIFY, '-', "Verify signed message"},
|
---|
58 | {"pk7out", OPT_PK7OUT, '-', "Output PKCS#7 structure"},
|
---|
59 | {"nointern", OPT_NOINTERN, '-',
|
---|
60 | "Don't search certificates in message for signer"},
|
---|
61 | {"nosigs", OPT_NOSIGS, '-', "Don't verify message signature"},
|
---|
62 | {"noverify", OPT_NOVERIFY, '-', "Don't verify signers certificate"},
|
---|
63 | {"nocerts", OPT_NOCERTS, '-',
|
---|
64 | "Don't include signers certificate when signing"},
|
---|
65 | {"nodetach", OPT_NODETACH, '-', "Use opaque signing"},
|
---|
66 | {"noattr", OPT_NOATTR, '-', "Don't include any signed attributes"},
|
---|
67 | {"binary", OPT_BINARY, '-', "Don't translate message to text"},
|
---|
68 | {"certfile", OPT_CERTFILE, '<', "Other certificates file"},
|
---|
69 | {"signer", OPT_SIGNER, 's', "Signer certificate file"},
|
---|
70 | {"recip", OPT_RECIP, '<', "Recipient certificate file for decryption"},
|
---|
71 | {"in", OPT_IN, '<', "Input file"},
|
---|
72 | {"inform", OPT_INFORM, 'c', "Input format SMIME (default), PEM or DER"},
|
---|
73 | {"inkey", OPT_INKEY, '<',
|
---|
74 | "Input private key (if not signer or recipient)"},
|
---|
75 | {"keyform", OPT_KEYFORM, 'f', "Input private key format (PEM or ENGINE)"},
|
---|
76 | {"out", OPT_OUT, '>', "Output file"},
|
---|
77 | {"outform", OPT_OUTFORM, 'c',
|
---|
78 | "Output format SMIME (default), PEM or DER"},
|
---|
79 | {"content", OPT_CONTENT, '<',
|
---|
80 | "Supply or override content for detached signature"},
|
---|
81 | {"to", OPT_TO, 's', "To address"},
|
---|
82 | {"from", OPT_FROM, 's', "From address"},
|
---|
83 | {"subject", OPT_SUBJECT, 's', "Subject"},
|
---|
84 | {"text", OPT_TEXT, '-', "Include or delete text MIME headers"},
|
---|
85 | {"CApath", OPT_CAPATH, '/', "Trusted certificates directory"},
|
---|
86 | {"CAfile", OPT_CAFILE, '<', "Trusted certificates file"},
|
---|
87 | {"no-CAfile", OPT_NOCAFILE, '-',
|
---|
88 | "Do not load the default certificates file"},
|
---|
89 | {"no-CApath", OPT_NOCAPATH, '-',
|
---|
90 | "Do not load certificates from the default certificates directory"},
|
---|
91 | {"resign", OPT_RESIGN, '-', "Resign a signed message"},
|
---|
92 | {"nochain", OPT_NOCHAIN, '-',
|
---|
93 | "set PKCS7_NOCHAIN so certificates contained in the message are not used as untrusted CAs" },
|
---|
94 | {"nosmimecap", OPT_NOSMIMECAP, '-', "Omit the SMIMECapabilities attribute"},
|
---|
95 | {"stream", OPT_STREAM, '-', "Enable CMS streaming" },
|
---|
96 | {"indef", OPT_INDEF, '-', "Same as -stream" },
|
---|
97 | {"noindef", OPT_NOINDEF, '-', "Disable CMS streaming"},
|
---|
98 | {"crlfeol", OPT_CRLFEOL, '-', "Use CRLF as EOL termination instead of CR only"},
|
---|
99 | {"rand", OPT_RAND, 's',
|
---|
100 | "Load the file(s) into the random number generator"},
|
---|
101 | {"passin", OPT_PASSIN, 's', "Input file pass phrase source"},
|
---|
102 | {"md", OPT_MD, 's', "Digest algorithm to use when signing or resigning"},
|
---|
103 | {"", OPT_CIPHER, '-', "Any supported cipher"},
|
---|
104 | OPT_V_OPTIONS,
|
---|
105 | #ifndef OPENSSL_NO_ENGINE
|
---|
106 | {"engine", OPT_ENGINE, 's', "Use engine, possibly a hardware device"},
|
---|
107 | #endif
|
---|
108 | {NULL}
|
---|
109 | };
|
---|
110 |
|
---|
111 | int smime_main(int argc, char **argv)
|
---|
112 | {
|
---|
113 | BIO *in = NULL, *out = NULL, *indata = NULL;
|
---|
114 | EVP_PKEY *key = NULL;
|
---|
115 | PKCS7 *p7 = NULL;
|
---|
116 | STACK_OF(OPENSSL_STRING) *sksigners = NULL, *skkeys = NULL;
|
---|
117 | STACK_OF(X509) *encerts = NULL, *other = NULL;
|
---|
118 | X509 *cert = NULL, *recip = NULL, *signer = NULL;
|
---|
119 | X509_STORE *store = NULL;
|
---|
120 | X509_VERIFY_PARAM *vpm = NULL;
|
---|
121 | const EVP_CIPHER *cipher = NULL;
|
---|
122 | const EVP_MD *sign_md = NULL;
|
---|
123 | const char *CAfile = NULL, *CApath = NULL, *prog = NULL;
|
---|
124 | char *certfile = NULL, *keyfile = NULL, *contfile = NULL, *inrand = NULL;
|
---|
125 | char *infile = NULL, *outfile = NULL, *signerfile = NULL, *recipfile =
|
---|
126 | NULL;
|
---|
127 | char *passinarg = NULL, *passin = NULL, *to = NULL, *from =
|
---|
128 | NULL, *subject = NULL;
|
---|
129 | OPTION_CHOICE o;
|
---|
130 | int noCApath = 0, noCAfile = 0;
|
---|
131 | int flags = PKCS7_DETACHED, operation = 0, ret = 0, need_rand = 0, indef =
|
---|
132 | 0;
|
---|
133 | int informat = FORMAT_SMIME, outformat = FORMAT_SMIME, keyform =
|
---|
134 | FORMAT_PEM;
|
---|
135 | int vpmtouched = 0, rv = 0;
|
---|
136 | ENGINE *e = NULL;
|
---|
137 | const char *mime_eol = "\n";
|
---|
138 |
|
---|
139 | if ((vpm = X509_VERIFY_PARAM_new()) == NULL)
|
---|
140 | return 1;
|
---|
141 |
|
---|
142 | prog = opt_init(argc, argv, smime_options);
|
---|
143 | while ((o = opt_next()) != OPT_EOF) {
|
---|
144 | switch (o) {
|
---|
145 | case OPT_EOF:
|
---|
146 | case OPT_ERR:
|
---|
147 | opthelp:
|
---|
148 | BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
|
---|
149 | goto end;
|
---|
150 | case OPT_HELP:
|
---|
151 | opt_help(smime_options);
|
---|
152 | ret = 0;
|
---|
153 | goto end;
|
---|
154 | case OPT_INFORM:
|
---|
155 | if (!opt_format(opt_arg(), OPT_FMT_PDS, &informat))
|
---|
156 | goto opthelp;
|
---|
157 | break;
|
---|
158 | case OPT_IN:
|
---|
159 | infile = opt_arg();
|
---|
160 | break;
|
---|
161 | case OPT_OUTFORM:
|
---|
162 | if (!opt_format(opt_arg(), OPT_FMT_PDS, &outformat))
|
---|
163 | goto opthelp;
|
---|
164 | break;
|
---|
165 | case OPT_OUT:
|
---|
166 | outfile = opt_arg();
|
---|
167 | break;
|
---|
168 | case OPT_ENCRYPT:
|
---|
169 | operation = SMIME_ENCRYPT;
|
---|
170 | break;
|
---|
171 | case OPT_DECRYPT:
|
---|
172 | operation = SMIME_DECRYPT;
|
---|
173 | break;
|
---|
174 | case OPT_SIGN:
|
---|
175 | operation = SMIME_SIGN;
|
---|
176 | break;
|
---|
177 | case OPT_RESIGN:
|
---|
178 | operation = SMIME_RESIGN;
|
---|
179 | break;
|
---|
180 | case OPT_VERIFY:
|
---|
181 | operation = SMIME_VERIFY;
|
---|
182 | break;
|
---|
183 | case OPT_PK7OUT:
|
---|
184 | operation = SMIME_PK7OUT;
|
---|
185 | break;
|
---|
186 | case OPT_TEXT:
|
---|
187 | flags |= PKCS7_TEXT;
|
---|
188 | break;
|
---|
189 | case OPT_NOINTERN:
|
---|
190 | flags |= PKCS7_NOINTERN;
|
---|
191 | break;
|
---|
192 | case OPT_NOVERIFY:
|
---|
193 | flags |= PKCS7_NOVERIFY;
|
---|
194 | break;
|
---|
195 | case OPT_NOCHAIN:
|
---|
196 | flags |= PKCS7_NOCHAIN;
|
---|
197 | break;
|
---|
198 | case OPT_NOCERTS:
|
---|
199 | flags |= PKCS7_NOCERTS;
|
---|
200 | break;
|
---|
201 | case OPT_NOATTR:
|
---|
202 | flags |= PKCS7_NOATTR;
|
---|
203 | break;
|
---|
204 | case OPT_NODETACH:
|
---|
205 | flags &= ~PKCS7_DETACHED;
|
---|
206 | break;
|
---|
207 | case OPT_NOSMIMECAP:
|
---|
208 | flags |= PKCS7_NOSMIMECAP;
|
---|
209 | break;
|
---|
210 | case OPT_BINARY:
|
---|
211 | flags |= PKCS7_BINARY;
|
---|
212 | break;
|
---|
213 | case OPT_NOSIGS:
|
---|
214 | flags |= PKCS7_NOSIGS;
|
---|
215 | break;
|
---|
216 | case OPT_STREAM:
|
---|
217 | case OPT_INDEF:
|
---|
218 | indef = 1;
|
---|
219 | break;
|
---|
220 | case OPT_NOINDEF:
|
---|
221 | indef = 0;
|
---|
222 | break;
|
---|
223 | case OPT_CRLFEOL:
|
---|
224 | flags |= PKCS7_CRLFEOL;
|
---|
225 | mime_eol = "\r\n";
|
---|
226 | break;
|
---|
227 | case OPT_RAND:
|
---|
228 | inrand = opt_arg();
|
---|
229 | need_rand = 1;
|
---|
230 | break;
|
---|
231 | case OPT_ENGINE:
|
---|
232 | e = setup_engine(opt_arg(), 0);
|
---|
233 | break;
|
---|
234 | case OPT_PASSIN:
|
---|
235 | passinarg = opt_arg();
|
---|
236 | break;
|
---|
237 | case OPT_TO:
|
---|
238 | to = opt_arg();
|
---|
239 | break;
|
---|
240 | case OPT_FROM:
|
---|
241 | from = opt_arg();
|
---|
242 | break;
|
---|
243 | case OPT_SUBJECT:
|
---|
244 | subject = opt_arg();
|
---|
245 | break;
|
---|
246 | case OPT_SIGNER:
|
---|
247 | /* If previous -signer argument add signer to list */
|
---|
248 | if (signerfile) {
|
---|
249 | if (sksigners == NULL
|
---|
250 | && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL)
|
---|
251 | goto end;
|
---|
252 | sk_OPENSSL_STRING_push(sksigners, signerfile);
|
---|
253 | if (keyfile == NULL)
|
---|
254 | keyfile = signerfile;
|
---|
255 | if (skkeys == NULL
|
---|
256 | && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)
|
---|
257 | goto end;
|
---|
258 | sk_OPENSSL_STRING_push(skkeys, keyfile);
|
---|
259 | keyfile = NULL;
|
---|
260 | }
|
---|
261 | signerfile = opt_arg();
|
---|
262 | break;
|
---|
263 | case OPT_RECIP:
|
---|
264 | recipfile = opt_arg();
|
---|
265 | break;
|
---|
266 | case OPT_MD:
|
---|
267 | if (!opt_md(opt_arg(), &sign_md))
|
---|
268 | goto opthelp;
|
---|
269 | break;
|
---|
270 | case OPT_CIPHER:
|
---|
271 | if (!opt_cipher(opt_unknown(), &cipher))
|
---|
272 | goto opthelp;
|
---|
273 | break;
|
---|
274 | case OPT_INKEY:
|
---|
275 | /* If previous -inkey argument add signer to list */
|
---|
276 | if (keyfile) {
|
---|
277 | if (signerfile == NULL) {
|
---|
278 | BIO_printf(bio_err,
|
---|
279 | "%s: Must have -signer before -inkey\n", prog);
|
---|
280 | goto opthelp;
|
---|
281 | }
|
---|
282 | if (sksigners == NULL
|
---|
283 | && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL)
|
---|
284 | goto end;
|
---|
285 | sk_OPENSSL_STRING_push(sksigners, signerfile);
|
---|
286 | signerfile = NULL;
|
---|
287 | if (skkeys == NULL
|
---|
288 | && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)
|
---|
289 | goto end;
|
---|
290 | sk_OPENSSL_STRING_push(skkeys, keyfile);
|
---|
291 | }
|
---|
292 | keyfile = opt_arg();
|
---|
293 | break;
|
---|
294 | case OPT_KEYFORM:
|
---|
295 | if (!opt_format(opt_arg(), OPT_FMT_ANY, &keyform))
|
---|
296 | goto opthelp;
|
---|
297 | break;
|
---|
298 | case OPT_CERTFILE:
|
---|
299 | certfile = opt_arg();
|
---|
300 | break;
|
---|
301 | case OPT_CAFILE:
|
---|
302 | CAfile = opt_arg();
|
---|
303 | break;
|
---|
304 | case OPT_CAPATH:
|
---|
305 | CApath = opt_arg();
|
---|
306 | break;
|
---|
307 | case OPT_NOCAFILE:
|
---|
308 | noCAfile = 1;
|
---|
309 | break;
|
---|
310 | case OPT_NOCAPATH:
|
---|
311 | noCApath = 1;
|
---|
312 | break;
|
---|
313 | case OPT_CONTENT:
|
---|
314 | contfile = opt_arg();
|
---|
315 | break;
|
---|
316 | case OPT_V_CASES:
|
---|
317 | if (!opt_verify(o, vpm))
|
---|
318 | goto opthelp;
|
---|
319 | vpmtouched++;
|
---|
320 | break;
|
---|
321 | }
|
---|
322 | }
|
---|
323 | argc = opt_num_rest();
|
---|
324 | argv = opt_rest();
|
---|
325 |
|
---|
326 | if (!(operation & SMIME_SIGNERS) && (skkeys || sksigners)) {
|
---|
327 | BIO_puts(bio_err, "Multiple signers or keys not allowed\n");
|
---|
328 | goto opthelp;
|
---|
329 | }
|
---|
330 |
|
---|
331 | if (operation & SMIME_SIGNERS) {
|
---|
332 | /* Check to see if any final signer needs to be appended */
|
---|
333 | if (keyfile && !signerfile) {
|
---|
334 | BIO_puts(bio_err, "Illegal -inkey without -signer\n");
|
---|
335 | goto opthelp;
|
---|
336 | }
|
---|
337 | if (signerfile) {
|
---|
338 | if (!sksigners
|
---|
339 | && (sksigners = sk_OPENSSL_STRING_new_null()) == NULL)
|
---|
340 | goto end;
|
---|
341 | sk_OPENSSL_STRING_push(sksigners, signerfile);
|
---|
342 | if (!skkeys && (skkeys = sk_OPENSSL_STRING_new_null()) == NULL)
|
---|
343 | goto end;
|
---|
344 | if (!keyfile)
|
---|
345 | keyfile = signerfile;
|
---|
346 | sk_OPENSSL_STRING_push(skkeys, keyfile);
|
---|
347 | }
|
---|
348 | if (!sksigners) {
|
---|
349 | BIO_printf(bio_err, "No signer certificate specified\n");
|
---|
350 | goto opthelp;
|
---|
351 | }
|
---|
352 | signerfile = NULL;
|
---|
353 | keyfile = NULL;
|
---|
354 | need_rand = 1;
|
---|
355 | } else if (operation == SMIME_DECRYPT) {
|
---|
356 | if (!recipfile && !keyfile) {
|
---|
357 | BIO_printf(bio_err,
|
---|
358 | "No recipient certificate or key specified\n");
|
---|
359 | goto opthelp;
|
---|
360 | }
|
---|
361 | } else if (operation == SMIME_ENCRYPT) {
|
---|
362 | if (argc == 0) {
|
---|
363 | BIO_printf(bio_err, "No recipient(s) certificate(s) specified\n");
|
---|
364 | goto opthelp;
|
---|
365 | }
|
---|
366 | need_rand = 1;
|
---|
367 | } else if (!operation)
|
---|
368 | goto opthelp;
|
---|
369 |
|
---|
370 | if (!app_passwd(passinarg, NULL, &passin, NULL)) {
|
---|
371 | BIO_printf(bio_err, "Error getting password\n");
|
---|
372 | goto end;
|
---|
373 | }
|
---|
374 |
|
---|
375 | if (need_rand) {
|
---|
376 | app_RAND_load_file(NULL, (inrand != NULL));
|
---|
377 | if (inrand != NULL)
|
---|
378 | BIO_printf(bio_err, "%ld semi-random bytes loaded\n",
|
---|
379 | app_RAND_load_files(inrand));
|
---|
380 | }
|
---|
381 |
|
---|
382 | ret = 2;
|
---|
383 |
|
---|
384 | if (!(operation & SMIME_SIGNERS))
|
---|
385 | flags &= ~PKCS7_DETACHED;
|
---|
386 |
|
---|
387 | if (!(operation & SMIME_OP)) {
|
---|
388 | if (flags & PKCS7_BINARY)
|
---|
389 | outformat = FORMAT_BINARY;
|
---|
390 | }
|
---|
391 |
|
---|
392 | if (!(operation & SMIME_IP)) {
|
---|
393 | if (flags & PKCS7_BINARY)
|
---|
394 | informat = FORMAT_BINARY;
|
---|
395 | }
|
---|
396 |
|
---|
397 | if (operation == SMIME_ENCRYPT) {
|
---|
398 | if (!cipher) {
|
---|
399 | #ifndef OPENSSL_NO_DES
|
---|
400 | cipher = EVP_des_ede3_cbc();
|
---|
401 | #else
|
---|
402 | BIO_printf(bio_err, "No cipher selected\n");
|
---|
403 | goto end;
|
---|
404 | #endif
|
---|
405 | }
|
---|
406 | encerts = sk_X509_new_null();
|
---|
407 | if (!encerts)
|
---|
408 | goto end;
|
---|
409 | while (*argv) {
|
---|
410 | cert = load_cert(*argv, FORMAT_PEM,
|
---|
411 | "recipient certificate file");
|
---|
412 | if (cert == NULL)
|
---|
413 | goto end;
|
---|
414 | sk_X509_push(encerts, cert);
|
---|
415 | cert = NULL;
|
---|
416 | argv++;
|
---|
417 | }
|
---|
418 | }
|
---|
419 |
|
---|
420 | if (certfile) {
|
---|
421 | if (!load_certs(certfile, &other, FORMAT_PEM, NULL,
|
---|
422 | "certificate file")) {
|
---|
423 | ERR_print_errors(bio_err);
|
---|
424 | goto end;
|
---|
425 | }
|
---|
426 | }
|
---|
427 |
|
---|
428 | if (recipfile && (operation == SMIME_DECRYPT)) {
|
---|
429 | if ((recip = load_cert(recipfile, FORMAT_PEM,
|
---|
430 | "recipient certificate file")) == NULL) {
|
---|
431 | ERR_print_errors(bio_err);
|
---|
432 | goto end;
|
---|
433 | }
|
---|
434 | }
|
---|
435 |
|
---|
436 | if (operation == SMIME_DECRYPT) {
|
---|
437 | if (!keyfile)
|
---|
438 | keyfile = recipfile;
|
---|
439 | } else if (operation == SMIME_SIGN) {
|
---|
440 | if (!keyfile)
|
---|
441 | keyfile = signerfile;
|
---|
442 | } else
|
---|
443 | keyfile = NULL;
|
---|
444 |
|
---|
445 | if (keyfile) {
|
---|
446 | key = load_key(keyfile, keyform, 0, passin, e, "signing key file");
|
---|
447 | if (!key)
|
---|
448 | goto end;
|
---|
449 | }
|
---|
450 |
|
---|
451 | in = bio_open_default(infile, 'r', informat);
|
---|
452 | if (in == NULL)
|
---|
453 | goto end;
|
---|
454 |
|
---|
455 | if (operation & SMIME_IP) {
|
---|
456 | if (informat == FORMAT_SMIME)
|
---|
457 | p7 = SMIME_read_PKCS7(in, &indata);
|
---|
458 | else if (informat == FORMAT_PEM)
|
---|
459 | p7 = PEM_read_bio_PKCS7(in, NULL, NULL, NULL);
|
---|
460 | else if (informat == FORMAT_ASN1)
|
---|
461 | p7 = d2i_PKCS7_bio(in, NULL);
|
---|
462 | else {
|
---|
463 | BIO_printf(bio_err, "Bad input format for PKCS#7 file\n");
|
---|
464 | goto end;
|
---|
465 | }
|
---|
466 |
|
---|
467 | if (!p7) {
|
---|
468 | BIO_printf(bio_err, "Error reading S/MIME message\n");
|
---|
469 | goto end;
|
---|
470 | }
|
---|
471 | if (contfile) {
|
---|
472 | BIO_free(indata);
|
---|
473 | if ((indata = BIO_new_file(contfile, "rb")) == NULL) {
|
---|
474 | BIO_printf(bio_err, "Can't read content file %s\n", contfile);
|
---|
475 | goto end;
|
---|
476 | }
|
---|
477 | }
|
---|
478 | }
|
---|
479 |
|
---|
480 | out = bio_open_default(outfile, 'w', outformat);
|
---|
481 | if (out == NULL)
|
---|
482 | goto end;
|
---|
483 |
|
---|
484 | if (operation == SMIME_VERIFY) {
|
---|
485 | if ((store = setup_verify(CAfile, CApath, noCAfile, noCApath)) == NULL)
|
---|
486 | goto end;
|
---|
487 | X509_STORE_set_verify_cb(store, smime_cb);
|
---|
488 | if (vpmtouched)
|
---|
489 | X509_STORE_set1_param(store, vpm);
|
---|
490 | }
|
---|
491 |
|
---|
492 | ret = 3;
|
---|
493 |
|
---|
494 | if (operation == SMIME_ENCRYPT) {
|
---|
495 | if (indef)
|
---|
496 | flags |= PKCS7_STREAM;
|
---|
497 | p7 = PKCS7_encrypt(encerts, in, cipher, flags);
|
---|
498 | } else if (operation & SMIME_SIGNERS) {
|
---|
499 | int i;
|
---|
500 | /*
|
---|
501 | * If detached data content we only enable streaming if S/MIME output
|
---|
502 | * format.
|
---|
503 | */
|
---|
504 | if (operation == SMIME_SIGN) {
|
---|
505 | if (flags & PKCS7_DETACHED) {
|
---|
506 | if (outformat == FORMAT_SMIME)
|
---|
507 | flags |= PKCS7_STREAM;
|
---|
508 | } else if (indef)
|
---|
509 | flags |= PKCS7_STREAM;
|
---|
510 | flags |= PKCS7_PARTIAL;
|
---|
511 | p7 = PKCS7_sign(NULL, NULL, other, in, flags);
|
---|
512 | if (!p7)
|
---|
513 | goto end;
|
---|
514 | if (flags & PKCS7_NOCERTS) {
|
---|
515 | for (i = 0; i < sk_X509_num(other); i++) {
|
---|
516 | X509 *x = sk_X509_value(other, i);
|
---|
517 | PKCS7_add_certificate(p7, x);
|
---|
518 | }
|
---|
519 | }
|
---|
520 | } else
|
---|
521 | flags |= PKCS7_REUSE_DIGEST;
|
---|
522 | for (i = 0; i < sk_OPENSSL_STRING_num(sksigners); i++) {
|
---|
523 | signerfile = sk_OPENSSL_STRING_value(sksigners, i);
|
---|
524 | keyfile = sk_OPENSSL_STRING_value(skkeys, i);
|
---|
525 | signer = load_cert(signerfile, FORMAT_PEM,
|
---|
526 | "signer certificate");
|
---|
527 | if (!signer)
|
---|
528 | goto end;
|
---|
529 | key = load_key(keyfile, keyform, 0, passin, e, "signing key file");
|
---|
530 | if (!key)
|
---|
531 | goto end;
|
---|
532 | if (!PKCS7_sign_add_signer(p7, signer, key, sign_md, flags))
|
---|
533 | goto end;
|
---|
534 | X509_free(signer);
|
---|
535 | signer = NULL;
|
---|
536 | EVP_PKEY_free(key);
|
---|
537 | key = NULL;
|
---|
538 | }
|
---|
539 | /* If not streaming or resigning finalize structure */
|
---|
540 | if ((operation == SMIME_SIGN) && !(flags & PKCS7_STREAM)) {
|
---|
541 | if (!PKCS7_final(p7, in, flags))
|
---|
542 | goto end;
|
---|
543 | }
|
---|
544 | }
|
---|
545 |
|
---|
546 | if (!p7) {
|
---|
547 | BIO_printf(bio_err, "Error creating PKCS#7 structure\n");
|
---|
548 | goto end;
|
---|
549 | }
|
---|
550 |
|
---|
551 | ret = 4;
|
---|
552 | if (operation == SMIME_DECRYPT) {
|
---|
553 | if (!PKCS7_decrypt(p7, key, recip, out, flags)) {
|
---|
554 | BIO_printf(bio_err, "Error decrypting PKCS#7 structure\n");
|
---|
555 | goto end;
|
---|
556 | }
|
---|
557 | } else if (operation == SMIME_VERIFY) {
|
---|
558 | STACK_OF(X509) *signers;
|
---|
559 | if (PKCS7_verify(p7, other, store, indata, out, flags))
|
---|
560 | BIO_printf(bio_err, "Verification successful\n");
|
---|
561 | else {
|
---|
562 | BIO_printf(bio_err, "Verification failure\n");
|
---|
563 | goto end;
|
---|
564 | }
|
---|
565 | signers = PKCS7_get0_signers(p7, other, flags);
|
---|
566 | if (!save_certs(signerfile, signers)) {
|
---|
567 | BIO_printf(bio_err, "Error writing signers to %s\n", signerfile);
|
---|
568 | ret = 5;
|
---|
569 | goto end;
|
---|
570 | }
|
---|
571 | sk_X509_free(signers);
|
---|
572 | } else if (operation == SMIME_PK7OUT)
|
---|
573 | PEM_write_bio_PKCS7(out, p7);
|
---|
574 | else {
|
---|
575 | if (to)
|
---|
576 | BIO_printf(out, "To: %s%s", to, mime_eol);
|
---|
577 | if (from)
|
---|
578 | BIO_printf(out, "From: %s%s", from, mime_eol);
|
---|
579 | if (subject)
|
---|
580 | BIO_printf(out, "Subject: %s%s", subject, mime_eol);
|
---|
581 | if (outformat == FORMAT_SMIME) {
|
---|
582 | if (operation == SMIME_RESIGN)
|
---|
583 | rv = SMIME_write_PKCS7(out, p7, indata, flags);
|
---|
584 | else
|
---|
585 | rv = SMIME_write_PKCS7(out, p7, in, flags);
|
---|
586 | } else if (outformat == FORMAT_PEM)
|
---|
587 | rv = PEM_write_bio_PKCS7_stream(out, p7, in, flags);
|
---|
588 | else if (outformat == FORMAT_ASN1)
|
---|
589 | rv = i2d_PKCS7_bio_stream(out, p7, in, flags);
|
---|
590 | else {
|
---|
591 | BIO_printf(bio_err, "Bad output format for PKCS#7 file\n");
|
---|
592 | goto end;
|
---|
593 | }
|
---|
594 | if (rv == 0) {
|
---|
595 | BIO_printf(bio_err, "Error writing output\n");
|
---|
596 | ret = 3;
|
---|
597 | goto end;
|
---|
598 | }
|
---|
599 | }
|
---|
600 | ret = 0;
|
---|
601 | end:
|
---|
602 | if (need_rand)
|
---|
603 | app_RAND_write_file(NULL);
|
---|
604 | if (ret)
|
---|
605 | ERR_print_errors(bio_err);
|
---|
606 | sk_X509_pop_free(encerts, X509_free);
|
---|
607 | sk_X509_pop_free(other, X509_free);
|
---|
608 | X509_VERIFY_PARAM_free(vpm);
|
---|
609 | sk_OPENSSL_STRING_free(sksigners);
|
---|
610 | sk_OPENSSL_STRING_free(skkeys);
|
---|
611 | X509_STORE_free(store);
|
---|
612 | X509_free(cert);
|
---|
613 | X509_free(recip);
|
---|
614 | X509_free(signer);
|
---|
615 | EVP_PKEY_free(key);
|
---|
616 | PKCS7_free(p7);
|
---|
617 | release_engine(e);
|
---|
618 | BIO_free(in);
|
---|
619 | BIO_free(indata);
|
---|
620 | BIO_free_all(out);
|
---|
621 | OPENSSL_free(passin);
|
---|
622 | return (ret);
|
---|
623 | }
|
---|
624 |
|
---|
625 | static int save_certs(char *signerfile, STACK_OF(X509) *signers)
|
---|
626 | {
|
---|
627 | int i;
|
---|
628 | BIO *tmp;
|
---|
629 | if (!signerfile)
|
---|
630 | return 1;
|
---|
631 | tmp = BIO_new_file(signerfile, "w");
|
---|
632 | if (!tmp)
|
---|
633 | return 0;
|
---|
634 | for (i = 0; i < sk_X509_num(signers); i++)
|
---|
635 | PEM_write_bio_X509(tmp, sk_X509_value(signers, i));
|
---|
636 | BIO_free(tmp);
|
---|
637 | return 1;
|
---|
638 | }
|
---|
639 |
|
---|
640 | /* Minimal callback just to output policy info (if any) */
|
---|
641 |
|
---|
642 | static int smime_cb(int ok, X509_STORE_CTX *ctx)
|
---|
643 | {
|
---|
644 | int error;
|
---|
645 |
|
---|
646 | error = X509_STORE_CTX_get_error(ctx);
|
---|
647 |
|
---|
648 | if ((error != X509_V_ERR_NO_EXPLICIT_POLICY)
|
---|
649 | && ((error != X509_V_OK) || (ok != 2)))
|
---|
650 | return ok;
|
---|
651 |
|
---|
652 | policies_print(ctx);
|
---|
653 |
|
---|
654 | return ok;
|
---|
655 |
|
---|
656 | }
|
---|