NeoMutt  2024-02-01-25-ga71e95
Teaching an old dog new tricks
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crypt.c File Reference

Signing/encryption multiplexor. More...

#include "config.h"
#include <locale.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include "mutt/lib.h"
#include "address/lib.h"
#include "config/lib.h"
#include "email/lib.h"
#include "core/lib.h"
#include "alias/lib.h"
#include "gui/lib.h"
#include "mutt.h"
#include "crypt.h"
#include "lib.h"
#include "attach/lib.h"
#include "question/lib.h"
#include "send/lib.h"
#include "copy.h"
#include "cryptglue.h"
#include "globals.h"
#include "handler.h"
#include "mx.h"
#include "autocrypt/lib.h"
+ Include dependency graph for crypt.c:

Go to the source code of this file.

Functions

void crypt_current_time (struct State *state, const char *app_name)
 Print the current time.
 
void crypt_forget_passphrase (void)
 Forget a passphrase and display a message.
 
bool crypt_valid_passphrase (SecurityFlags flags)
 Check that we have a usable passphrase, ask if not.
 
int mutt_protect (struct Email *e, char *keylist, bool postpone)
 Encrypt and/or sign a message.
 
SecurityFlags mutt_is_multipart_signed (struct Body *b)
 Is a message signed?
 
SecurityFlags mutt_is_multipart_encrypted (struct Body *b)
 Does the message have encrypted parts?
 
int mutt_is_valid_multipart_pgp_encrypted (struct Body *b)
 Is this a valid multi-part encrypted message?
 
SecurityFlags mutt_is_malformed_multipart_pgp_encrypted (struct Body *b)
 Check for malformed layout.
 
SecurityFlags mutt_is_application_pgp (struct Body *b)
 Does the message use PGP?
 
SecurityFlags mutt_is_application_smime (struct Body *b)
 Does the message use S/MIME?
 
SecurityFlags crypt_query (struct Body *b)
 Check out the type of encryption used.
 
int crypt_write_signed (struct Body *b, struct State *state, const char *tempfile)
 Write the message body/part.
 
void crypt_convert_to_7bit (struct Body *b)
 Convert an email to 7bit encoding.
 
void crypt_extract_keys_from_messages (struct Mailbox *m, struct EmailArray *ea)
 Extract keys from a message.
 
int crypt_get_keys (struct Email *e, char **keylist, bool oppenc_mode)
 Check we have all the keys we need.
 
void crypt_opportunistic_encrypt (struct Email *e)
 Can all recipients be determined.
 
static void crypt_fetch_signatures (struct Body ***b_sigs, struct Body *b, int *n)
 Create an array of an emails parts.
 
bool mutt_should_hide_protected_subject (struct Email *e)
 Should NeoMutt hide the protected subject?
 
int mutt_protected_headers_handler (struct Body *b_email, struct State *state)
 Handler for protected headers - Implements handler_t -.
 
int mutt_signed_handler (struct Body *b_email, struct State *state)
 Handler for "multipart/signed" - Implements handler_t -.
 
const char * crypt_get_fingerprint_or_id (const char *p, const char **pphint, const char **ppl, const char **pps)
 Get the fingerprint or long key ID.
 
bool crypt_is_numerical_keyid (const char *s)
 Is this a numerical keyid.
 

Detailed Description

Signing/encryption multiplexor.

Authors
  • Richard Russon
  • Pietro Cerutti
  • Anna Figueiredo Gomes

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Definition in file crypt.c.

Function Documentation

◆ crypt_current_time()

void crypt_current_time ( struct State state,
const char *  app_name 
)

Print the current time.

Parameters
stateState to use
app_nameApp name, e.g. "PGP"

print the current time to avoid spoofing of the signature output

Definition at line 65 of file crypt.c.

66{
67 char p[256] = { 0 };
68 char tmp[512] = { 0 };
69
70 if (!WithCrypto)
71 return;
72
73 const bool c_crypt_timestamp = cs_subset_bool(NeoMutt->sub, "crypt_timestamp");
74 if (c_crypt_timestamp)
75 {
76 mutt_date_localtime_format(p, sizeof(p), _(" (current time: %c)"), mutt_date_now());
77 }
78 else
79 {
80 *p = '\0';
81 }
82
83 snprintf(tmp, sizeof(tmp), _("[-- %s output follows%s --]\n"), NONULL(app_name), p);
84 state_attach_puts(state, tmp);
85}
bool cs_subset_bool(const struct ConfigSubset *sub, const char *name)
Get a boolean config item by name.
Definition: helpers.c:48
size_t mutt_date_localtime_format(char *buf, size_t buflen, const char *format, time_t t)
Format localtime.
Definition: date.c:953
time_t mutt_date_now(void)
Return the number of seconds since the Unix epoch.
Definition: date.c:455
#define _(a)
Definition: message.h:28
void state_attach_puts(struct State *state, const char *t)
Write a string to the state.
Definition: state.c:103
#define WithCrypto
Definition: lib.h:116
#define NONULL(x)
Definition: string2.h:37
Container for Accounts, Notifications.
Definition: neomutt.h:41
struct ConfigSubset * sub
Inherited config items.
Definition: neomutt.h:45
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◆ crypt_forget_passphrase()

void crypt_forget_passphrase ( void  )

Forget a passphrase and display a message.

Definition at line 90 of file crypt.c.

91{
94
97
98 if (WithCrypto)
99 {
100 /* L10N: Due to the implementation details (e.g. some passwords are managed
101 by gpg-agent) we can't know whether we forgot zero, 1, 12, ...
102 passwords. So in English we use "Passphrases". Your language might
103 have other means to express this. */
104 mutt_message(_("Passphrases forgotten"));
105 }
106}
void crypt_smime_void_passphrase(void)
Wrapper for CryptModuleSpecs::void_passphrase()
Definition: cryptglue.c:412
void crypt_pgp_void_passphrase(void)
Wrapper for CryptModuleSpecs::void_passphrase()
Definition: cryptglue.c:190
#define mutt_message(...)
Definition: logging2.h:91
#define APPLICATION_PGP
Use PGP to encrypt/sign.
Definition: lib.h:90
#define APPLICATION_SMIME
Use SMIME to encrypt/sign.
Definition: lib.h:91
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◆ crypt_valid_passphrase()

bool crypt_valid_passphrase ( SecurityFlags  flags)

Check that we have a usable passphrase, ask if not.

Parameters
flagsFlags, see SecurityFlags
Return values
trueSuccess
falseFailed

Definition at line 132 of file crypt.c.

133{
134 bool rc = false;
135
136#ifndef DEBUG
137 disable_coredumps();
138#endif
139
140 if (((WithCrypto & APPLICATION_PGP) != 0) && (flags & APPLICATION_PGP))
142
143 if (((WithCrypto & APPLICATION_SMIME) != 0) && (flags & APPLICATION_SMIME))
145
146 return rc;
147}
bool crypt_smime_valid_passphrase(void)
Wrapper for CryptModuleSpecs::valid_passphrase()
Definition: cryptglue.c:421
bool crypt_pgp_valid_passphrase(void)
Wrapper for CryptModuleSpecs::valid_passphrase()
Definition: cryptglue.c:199
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◆ mutt_protect()

int mutt_protect ( struct Email e,
char *  keylist,
bool  postpone 
)

Encrypt and/or sign a message.

Parameters
eEmail
keylistList of keys to encrypt to (space-separated)
postponeWhen true, signing is automatically disabled
Return values
0Success
-1Error

Definition at line 157 of file crypt.c.

158{
159 struct Body *pbody = NULL, *tmp_pbody = NULL;
160 struct Body *tmp_smime_pbody = NULL;
161 struct Body *tmp_pgp_pbody = NULL;
162 bool has_retainable_sig = false;
163
164 if (!WithCrypto)
165 return -1;
166
167 SecurityFlags security = e->security;
168 int sign = security & (SEC_AUTOCRYPT | SEC_SIGN);
169 if (postpone)
170 {
171 sign = SEC_NO_FLAGS;
172 security &= ~SEC_SIGN;
173 }
174
175 if (!(security & (SEC_ENCRYPT | SEC_AUTOCRYPT)) && !sign)
176 return 0;
177
178 if (sign && !(security & SEC_AUTOCRYPT) && !crypt_valid_passphrase(security))
179 return -1;
180
181 if (((WithCrypto & APPLICATION_PGP) != 0) && !(security & SEC_AUTOCRYPT) &&
182 ((security & PGP_INLINE) == PGP_INLINE))
183 {
184 if ((e->body->type != TYPE_TEXT) || !mutt_istr_equal(e->body->subtype, "plain"))
185 {
186 if (query_quadoption(_("Inline PGP can't be used with attachments. Revert to PGP/MIME?"),
187 NeoMutt->sub, "pgp_mime_auto") != MUTT_YES)
188 {
189 mutt_error(_("Mail not sent: inline PGP can't be used with attachments"));
190 return -1;
191 }
192 }
193 else if (mutt_istr_equal("flowed", mutt_param_get(&e->body->parameter, "format")))
194 {
195 if ((query_quadoption(_("Inline PGP can't be used with format=flowed. Revert to PGP/MIME?"),
196 NeoMutt->sub, "pgp_mime_auto")) != MUTT_YES)
197 {
198 mutt_error(_("Mail not sent: inline PGP can't be used with format=flowed"));
199 return -1;
200 }
201 }
202 else
203 {
204 /* they really want to send it inline... go for it */
205 if (!isendwin())
206 {
207 mutt_endwin();
208 puts(_("Invoking PGP..."));
209 }
210 pbody = crypt_pgp_traditional_encryptsign(e->body, security, keylist);
211 if (pbody)
212 {
213 e->body = pbody;
214 return 0;
215 }
216
217 /* otherwise inline won't work...ask for revert */
218 if (query_quadoption(_("Message can't be sent inline. Revert to using PGP/MIME?"),
219 NeoMutt->sub, "pgp_mime_auto") != MUTT_YES)
220 {
221 mutt_error(_("Mail not sent"));
222 return -1;
223 }
224 }
225
226 /* go ahead with PGP/MIME */
227 }
228
229 if (!isendwin())
230 mutt_endwin();
231
233 tmp_smime_pbody = e->body;
235 tmp_pgp_pbody = e->body;
236
237#ifdef CRYPT_BACKEND_GPGME
238 const bool c_crypt_use_pka = cs_subset_bool(NeoMutt->sub, "crypt_use_pka");
239 if (sign && c_crypt_use_pka)
240#else
241 if (sign)
242#endif
243 {
244 /* Set sender (necessary for e.g. PKA). */
245 const char *mailbox = NULL;
246 struct Address *from = TAILQ_FIRST(&e->env->from);
247 bool free_from = false;
248
249 if (!from)
250 {
251 free_from = true;
253 }
254
255 mailbox = buf_string(from->mailbox);
256 const struct Address *c_envelope_from_address = cs_subset_address(NeoMutt->sub, "envelope_from_address");
257 if (!mailbox && c_envelope_from_address)
258 mailbox = buf_string(c_envelope_from_address->mailbox);
259
260 if (((WithCrypto & APPLICATION_SMIME) != 0) && (security & APPLICATION_SMIME))
262 else if (((WithCrypto & APPLICATION_PGP) != 0) && (security & APPLICATION_PGP))
264
265 if (free_from)
266 mutt_addr_free(&from);
267 }
268
269 const bool c_crypt_protected_headers_write = cs_subset_bool(NeoMutt->sub, "crypt_protected_headers_write");
270 if (c_crypt_protected_headers_write)
271 {
272 struct Envelope *protected_headers = mutt_env_new();
273 mutt_env_set_subject(protected_headers, e->env->subject);
274 /* Note: if other headers get added, such as to, cc, then a call to
275 * mutt_env_to_intl() will need to be added here too. */
276 mutt_prepare_envelope(protected_headers, 0, NeoMutt->sub);
277
279 e->body->mime_headers = protected_headers;
280 mutt_param_set(&e->body->parameter, "protected-headers", "v1");
281 }
282
283#ifdef USE_AUTOCRYPT
284 /* A note about e->body->mime_headers. If postpone or send
285 * fails, the mime_headers is cleared out before returning to the
286 * compose menu. So despite the "robustness" code above and in the
287 * gen_gossip_list function below, mime_headers will not be set when
288 * entering mutt_protect().
289 *
290 * This is important to note because the user could toggle
291 * $crypt_protected_headers_write or $autocrypt off back in the
292 * compose menu. We don't want mutt_write_rfc822_header() to write
293 * stale data from one option if the other is set.
294 */
295 const bool c_autocrypt = cs_subset_bool(NeoMutt->sub, "autocrypt");
296 if (c_autocrypt && !postpone && (security & SEC_AUTOCRYPT))
297 {
299 }
300#endif
301
302 if (sign)
303 {
304 if (((WithCrypto & APPLICATION_SMIME) != 0) && (security & APPLICATION_SMIME))
305 {
306 tmp_pbody = crypt_smime_sign_message(e->body, &e->env->from);
307 if (!tmp_pbody)
308 goto bail;
309 pbody = tmp_pbody;
310 tmp_smime_pbody = tmp_pbody;
311 }
312
313 const bool c_pgp_retainable_sigs = cs_subset_bool(NeoMutt->sub, "pgp_retainable_sigs");
314 if (((WithCrypto & APPLICATION_PGP) != 0) && (security & APPLICATION_PGP) &&
315 (!(security & (SEC_ENCRYPT | SEC_AUTOCRYPT)) || c_pgp_retainable_sigs))
316 {
317 tmp_pbody = crypt_pgp_sign_message(e->body, &e->env->from);
318 if (!tmp_pbody)
319 goto bail;
320
321 has_retainable_sig = true;
322 sign = SEC_NO_FLAGS;
323 pbody = tmp_pbody;
324 tmp_pgp_pbody = tmp_pbody;
325 }
326 }
327
328 if (security & (SEC_ENCRYPT | SEC_AUTOCRYPT))
329 {
330 if (((WithCrypto & APPLICATION_SMIME) != 0) && (security & APPLICATION_SMIME))
331 {
332 tmp_pbody = crypt_smime_build_smime_entity(tmp_smime_pbody, keylist);
333 if (!tmp_pbody)
334 {
335 /* signed ? free it! */
336 goto bail;
337 }
338 /* free tmp_body if messages was signed AND encrypted ... */
339 if ((tmp_smime_pbody != e->body) && (tmp_smime_pbody != tmp_pbody))
340 {
341 /* detach and don't delete e->body,
342 * which tmp_smime_pbody->parts after signing. */
343 tmp_smime_pbody->parts = tmp_smime_pbody->parts->next;
344 e->body->next = NULL;
345 mutt_body_free(&tmp_smime_pbody);
346 }
347 pbody = tmp_pbody;
348 }
349
350 if (((WithCrypto & APPLICATION_PGP) != 0) && (security & APPLICATION_PGP))
351 {
352 pbody = crypt_pgp_encrypt_message(e, tmp_pgp_pbody, keylist, sign, &e->env->from);
353 if (!pbody)
354 {
355 /* did we perform a retainable signature? */
356 if (has_retainable_sig)
357 {
358 /* remove the outer multipart layer */
359 tmp_pgp_pbody = mutt_remove_multipart(tmp_pgp_pbody);
360 /* get rid of the signature */
361 mutt_body_free(&tmp_pgp_pbody->next);
362 }
363
364 goto bail;
365 }
366
367 // destroy temporary signature envelope when doing retainable signatures.
368 if (has_retainable_sig)
369 {
370 tmp_pgp_pbody = mutt_remove_multipart(tmp_pgp_pbody);
371 mutt_body_free(&tmp_pgp_pbody->next);
372 }
373 }
374 }
375
376 if (pbody)
377 {
378 e->body = pbody;
379 return 0;
380 }
381
382bail:
384 mutt_param_delete(&e->body->parameter, "protected-headers");
385 return -1;
386}
void mutt_addr_free(struct Address **ptr)
Free a single Address.
Definition: address.c:462
int mutt_autocrypt_generate_gossip_list(struct Email *e)
Create the gossip list headers.
Definition: autocrypt.c:825
static const char * buf_string(const struct Buffer *buf)
Convert a buffer to a const char * "string".
Definition: buffer.h:97
const struct Address * cs_subset_address(const struct ConfigSubset *sub, const char *name)
Get an Address config item by name.
Definition: config_type.c:264
bool crypt_valid_passphrase(SecurityFlags flags)
Check that we have a usable passphrase, ask if not.
Definition: crypt.c:132
struct Body * crypt_smime_build_smime_entity(struct Body *b, char *certlist)
Wrapper for CryptModuleSpecs::smime_build_smime_entity()
Definition: cryptglue.c:496
struct Body * crypt_smime_sign_message(struct Body *b, const struct AddressList *from)
Wrapper for CryptModuleSpecs::sign_message()
Definition: cryptglue.c:485
struct Body * crypt_pgp_traditional_encryptsign(struct Body *b, SecurityFlags flags, char *keylist)
Wrapper for CryptModuleSpecs::pgp_traditional_encryptsign()
Definition: cryptglue.c:293
struct Body * crypt_pgp_sign_message(struct Body *b, const struct AddressList *from)
Wrapper for CryptModuleSpecs::sign_message()
Definition: cryptglue.c:326
void crypt_pgp_set_sender(const char *sender)
Wrapper for CryptModuleSpecs::set_sender()
Definition: cryptglue.c:403
void crypt_smime_set_sender(const char *sender)
Wrapper for CryptModuleSpecs::set_sender()
Definition: cryptglue.c:538
struct Body * crypt_pgp_encrypt_message(struct Email *e, struct Body *b, char *keylist, int sign, const struct AddressList *from)
Wrapper for CryptModuleSpecs::pgp_encrypt_message()
Definition: cryptglue.c:337
void mutt_endwin(void)
Shutdown curses.
Definition: curs_lib.c:153
void mutt_body_free(struct Body **ptr)
Free a Body.
Definition: body.c:58
void mutt_env_free(struct Envelope **ptr)
Free an Envelope.
Definition: envelope.c:126
struct Envelope * mutt_env_new(void)
Create a new Envelope.
Definition: envelope.c:46
void mutt_env_set_subject(struct Envelope *env, const char *subj)
Set both subject and real_subj to subj.
Definition: envelope.c:69
#define mutt_error(...)
Definition: logging2.h:92
@ TYPE_TEXT
Type: 'text/*'.
Definition: mime.h:38
struct Body * mutt_remove_multipart(struct Body *b)
Extract the multipart body if it exists.
Definition: multipart.c:126
bool mutt_istr_equal(const char *a, const char *b)
Compare two strings, ignoring case.
Definition: string.c:721
#define SEC_AUTOCRYPT
(Autocrypt) Message will be, or was Autocrypt encrypt+signed
Definition: lib.h:87
uint16_t SecurityFlags
Flags, e.g. SEC_ENCRYPT.
Definition: lib.h:76
#define PGP_INLINE
Definition: lib.h:100
#define SEC_NO_FLAGS
No flags are set.
Definition: lib.h:77
#define SEC_ENCRYPT
Email is encrypted.
Definition: lib.h:78
#define SEC_SIGN
Email is signed.
Definition: lib.h:79
char * mutt_param_get(const struct ParameterList *pl, const char *s)
Find a matching Parameter.
Definition: parameter.c:85
void mutt_param_delete(struct ParameterList *pl, const char *attribute)
Delete a matching Parameter.
Definition: parameter.c:143
void mutt_param_set(struct ParameterList *pl, const char *attribute, const char *value)
Set a Parameter.
Definition: parameter.c:111
@ MUTT_YES
User answered 'Yes', or assume 'Yes'.
Definition: quad.h:39
enum QuadOption query_quadoption(const char *prompt, struct ConfigSubset *sub, const char *name)
Ask the user a quad-question.
Definition: question.c:373
#define TAILQ_FIRST(head)
Definition: queue.h:723
struct Address * mutt_default_from(struct ConfigSubset *sub)
Get a default 'from' Address.
Definition: send.c:1460
void mutt_prepare_envelope(struct Envelope *env, bool final, struct ConfigSubset *sub)
Prepare an email header.
Definition: sendlib.c:779
An email address.
Definition: address.h:36
struct Buffer * mailbox
Mailbox and host address.
Definition: address.h:38
The body of an email.
Definition: body.h:36
struct Body * parts
parts of a multipart or message/rfc822
Definition: body.h:72
struct Envelope * mime_headers
Memory hole protected headers.
Definition: body.h:75
struct ParameterList parameter
Parameters of the content-type.
Definition: body.h:62
struct Body * next
next attachment in the list
Definition: body.h:71
char * subtype
content-type subtype
Definition: body.h:60
unsigned int type
content-type primary type, ContentType
Definition: body.h:40
struct Envelope * env
Envelope information.
Definition: email.h:68
SecurityFlags security
bit 0-10: flags, bit 11,12: application, bit 13: traditional pgp See: ncrypt/lib.h pgplib....
Definition: email.h:43
struct Body * body
List of MIME parts.
Definition: email.h:69
The header of an Email.
Definition: envelope.h:57
char *const subject
Email's subject.
Definition: envelope.h:70
struct AddressList from
Email's 'From' list.
Definition: envelope.h:59
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◆ mutt_is_multipart_signed()

SecurityFlags mutt_is_multipart_signed ( struct Body b)

Is a message signed?

Parameters
bBody of email
Return values
numMessage is signed, see SecurityFlags
0Message is not signed (SEC_NO_FLAGS)

Definition at line 394 of file crypt.c.

395{
396 if (!b || (b->type != TYPE_MULTIPART) || !b->subtype || !mutt_istr_equal(b->subtype, "signed"))
397 {
398 return SEC_NO_FLAGS;
399 }
400
401 char *p = mutt_param_get(&b->parameter, "protocol");
402 if (!p)
403 return SEC_NO_FLAGS;
404
405 if (mutt_istr_equal(p, "multipart/mixed"))
406 return SEC_SIGN;
407
408 if (((WithCrypto & APPLICATION_PGP) != 0) && mutt_istr_equal(p, "application/pgp-signature"))
409 {
410 return PGP_SIGN;
411 }
412
413 if (((WithCrypto & APPLICATION_SMIME) != 0) &&
414 (mutt_istr_equal(p, "application/x-pkcs7-signature") ||
415 mutt_istr_equal(p, "application/pkcs7-signature")))
416 {
417 return SMIME_SIGN;
418 }
419
420 return SEC_NO_FLAGS;
421}
@ TYPE_MULTIPART
Type: 'multipart/*'.
Definition: mime.h:37
#define PGP_SIGN
Definition: lib.h:97
#define SMIME_SIGN
Definition: lib.h:103
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◆ mutt_is_multipart_encrypted()

SecurityFlags mutt_is_multipart_encrypted ( struct Body b)

Does the message have encrypted parts?

Parameters
bBody of email
Return values
numMessage has got encrypted parts, see SecurityFlags
0Message hasn't got encrypted parts (SEC_NO_FLAGS)

Definition at line 429 of file crypt.c.

430{
431 if ((WithCrypto & APPLICATION_PGP) == 0)
432 return SEC_NO_FLAGS;
433
434 char *p = NULL;
435
436 if (!b || (b->type != TYPE_MULTIPART) || !b->subtype ||
437 !mutt_istr_equal(b->subtype, "encrypted") ||
438 !(p = mutt_param_get(&b->parameter, "protocol")) ||
439 !mutt_istr_equal(p, "application/pgp-encrypted"))
440 {
441 return SEC_NO_FLAGS;
442 }
443
444 return PGP_ENCRYPT;
445}
#define PGP_ENCRYPT
Definition: lib.h:96
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◆ mutt_is_valid_multipart_pgp_encrypted()

int mutt_is_valid_multipart_pgp_encrypted ( struct Body b)

Is this a valid multi-part encrypted message?

Parameters
bBody of email
Return values
>0Message is valid, with encrypted parts, e.g. PGP_ENCRYPT
0Message hasn't got encrypted parts

Definition at line 453 of file crypt.c.

454{
456 return 0;
457
458 b = b->parts;
459 if (!b || (b->type != TYPE_APPLICATION) || !b->subtype ||
460 !mutt_istr_equal(b->subtype, "pgp-encrypted"))
461 {
462 return 0;
463 }
464
465 b = b->next;
466 if (!b || (b->type != TYPE_APPLICATION) || !b->subtype ||
467 !mutt_istr_equal(b->subtype, "octet-stream"))
468 {
469 return 0;
470 }
471
472 return PGP_ENCRYPT;
473}
SecurityFlags mutt_is_multipart_encrypted(struct Body *b)
Does the message have encrypted parts?
Definition: crypt.c:429
@ TYPE_APPLICATION
Type: 'application/*'.
Definition: mime.h:33
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◆ mutt_is_malformed_multipart_pgp_encrypted()

SecurityFlags mutt_is_malformed_multipart_pgp_encrypted ( struct Body b)

Check for malformed layout.

Parameters
bBody of email
Return values
numSuccess, see SecurityFlags
0Error, (SEC_NO_FLAGS)

This checks for the malformed layout caused by MS Exchange in some cases:

<multipart/mixed>
<text/plain>
<application/pgp-encrypted> [BASE64-encoded]
<application/octet-stream> [BASE64-encoded]

Definition at line 490 of file crypt.c.

491{
493 return SEC_NO_FLAGS;
494
495 if (!b || (b->type != TYPE_MULTIPART) || !b->subtype || !mutt_istr_equal(b->subtype, "mixed"))
496 {
497 return SEC_NO_FLAGS;
498 }
499
500 b = b->parts;
501 if (!b || (b->type != TYPE_TEXT) || !b->subtype ||
502 !mutt_istr_equal(b->subtype, "plain") || (b->length != 0))
503 {
504 return SEC_NO_FLAGS;
505 }
506
507 b = b->next;
508 if (!b || (b->type != TYPE_APPLICATION) || !b->subtype ||
509 !mutt_istr_equal(b->subtype, "pgp-encrypted"))
510 {
511 return SEC_NO_FLAGS;
512 }
513
514 b = b->next;
515 if (!b || (b->type != TYPE_APPLICATION) || !b->subtype ||
516 !mutt_istr_equal(b->subtype, "octet-stream"))
517 {
518 return SEC_NO_FLAGS;
519 }
520
521 b = b->next;
522 if (b)
523 return SEC_NO_FLAGS;
524
525 return PGP_ENCRYPT;
526}
LOFF_T length
length (in bytes) of attachment
Definition: body.h:53
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◆ mutt_is_application_pgp()

SecurityFlags mutt_is_application_pgp ( struct Body b)

Does the message use PGP?

Parameters
bBody of email
Return values
>0Message uses PGP, e.g. PGP_ENCRYPT
0Message doesn't use PGP, (SEC_NO_FLAGS)

Definition at line 534 of file crypt.c.

535{
537 char *p = NULL;
538
539 if (b->type == TYPE_APPLICATION)
540 {
541 if (mutt_istr_equal(b->subtype, "pgp") || mutt_istr_equal(b->subtype, "x-pgp-message"))
542 {
543 p = mutt_param_get(&b->parameter, "x-action");
544 if (p && (mutt_istr_equal(p, "sign") || mutt_istr_equal(p, "signclear")))
545 {
546 t |= PGP_SIGN;
547 }
548
549 p = mutt_param_get(&b->parameter, "format");
550 if (p && mutt_istr_equal(p, "keys-only"))
551 {
552 t |= PGP_KEY;
553 }
554
555 if (t == SEC_NO_FLAGS)
556 t |= PGP_ENCRYPT; /* not necessarily correct, but... */
557 }
558
559 if (mutt_istr_equal(b->subtype, "pgp-signed"))
560 t |= PGP_SIGN;
561
562 if (mutt_istr_equal(b->subtype, "pgp-keys"))
563 t |= PGP_KEY;
564 }
565 else if ((b->type == TYPE_TEXT) && mutt_istr_equal("plain", b->subtype))
566 {
567 if (((p = mutt_param_get(&b->parameter, "x-mutt-action")) ||
568 (p = mutt_param_get(&b->parameter, "x-action")) ||
569 (p = mutt_param_get(&b->parameter, "action"))) &&
570 mutt_istr_startswith(p, "pgp-sign"))
571 {
572 t |= PGP_SIGN;
573 }
574 else if (p && mutt_istr_startswith(p, "pgp-encrypt"))
575 {
576 t |= PGP_ENCRYPT;
577 }
578 else if (p && mutt_istr_startswith(p, "pgp-keys"))
579 {
580 t |= PGP_KEY;
581 }
582 }
583 if (t)
584 t |= PGP_INLINE;
585
586 return t;
587}
size_t mutt_istr_startswith(const char *str, const char *prefix)
Check whether a string starts with a prefix, ignoring case.
Definition: string.c:242
#define PGP_KEY
Definition: lib.h:99
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◆ mutt_is_application_smime()

SecurityFlags mutt_is_application_smime ( struct Body b)

Does the message use S/MIME?

Parameters
bBody of email
Return values
>0Message uses S/MIME, e.g. SMIME_ENCRYPT
0Message doesn't use S/MIME, (SEC_NO_FLAGS)

Definition at line 595 of file crypt.c.

596{
597 if (!b)
598 return SEC_NO_FLAGS;
599
600 if (((b->type & TYPE_APPLICATION) == 0) || !b->subtype)
601 return SEC_NO_FLAGS;
602
603 char *t = NULL;
604 bool complain = false;
605 /* S/MIME MIME types don't need x- anymore, see RFC2311 */
606 if (mutt_istr_equal(b->subtype, "x-pkcs7-mime") || mutt_istr_equal(b->subtype, "pkcs7-mime"))
607 {
608 t = mutt_param_get(&b->parameter, "smime-type");
609 if (t)
610 {
611 if (mutt_istr_equal(t, "enveloped-data"))
612 return SMIME_ENCRYPT;
613 if (mutt_istr_equal(t, "signed-data"))
614 return SMIME_SIGN | SMIME_OPAQUE;
615 return SEC_NO_FLAGS;
616 }
617 /* Netscape 4.7 uses
618 * Content-Description: S/MIME Encrypted Message
619 * instead of Content-Type parameter */
620 if (mutt_istr_equal(b->description, "S/MIME Encrypted Message"))
621 return SMIME_ENCRYPT;
622 complain = true;
623 }
624 else if (!mutt_istr_equal(b->subtype, "octet-stream"))
625 {
626 return SEC_NO_FLAGS;
627 }
628
629 t = mutt_param_get(&b->parameter, "name");
630
631 if (!t)
632 t = b->d_filename;
633 if (!t)
634 t = b->filename;
635 if (!t)
636 {
637 if (complain)
638 {
639 mutt_message(_("S/MIME messages with no hints on content are unsupported"));
640 }
641 return SEC_NO_FLAGS;
642 }
643
644 /* no .p7c, .p10 support yet. */
645
646 int len = mutt_str_len(t) - 4;
647 if ((len > 0) && (*(t + len) == '.'))
648 {
649 len++;
650 if (mutt_istr_equal((t + len), "p7m"))
651 {
652 /* Not sure if this is the correct thing to do, but
653 * it's required for compatibility with Outlook */
654 return SMIME_SIGN | SMIME_OPAQUE;
655 }
656 else if (mutt_istr_equal((t + len), "p7s"))
657 {
658 return SMIME_SIGN | SMIME_OPAQUE;
659 }
660 }
661
662 return SEC_NO_FLAGS;
663}
size_t mutt_str_len(const char *a)
Calculate the length of a string, safely.
Definition: string.c:545
#define SMIME_OPAQUE
Definition: lib.h:106
#define SMIME_ENCRYPT
Definition: lib.h:102
char * d_filename
filename to be used for the content-disposition header If NULL, filename is used instead.
Definition: body.h:56
char * description
content-description
Definition: body.h:55
char * filename
When sending a message, this is the file to which this structure refers.
Definition: body.h:58
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◆ crypt_query()

SecurityFlags crypt_query ( struct Body b)

Check out the type of encryption used.

Parameters
bBody of email
Return values
numFlags, see SecurityFlags
0Error (SEC_NO_FLAGS)

Set the cached status values if there are any.

Definition at line 673 of file crypt.c.

674{
675 if (!WithCrypto || !b)
676 return SEC_NO_FLAGS;
677
679
680 if (b->type == TYPE_APPLICATION)
681 {
684
686 {
688 if (rc && b->goodsig)
689 rc |= SEC_GOODSIGN;
690 if (rc && b->badsig)
691 rc |= SEC_BADSIGN;
692 }
693 }
694 else if (((WithCrypto & APPLICATION_PGP) != 0) && (b->type == TYPE_TEXT))
695 {
697 if (rc && b->goodsig)
698 rc |= SEC_GOODSIGN;
699 }
700
701 if (b->type == TYPE_MULTIPART)
702 {
706
707 if (rc && b->goodsig)
708 rc |= SEC_GOODSIGN;
709#ifdef USE_AUTOCRYPT
710 if (rc && b->is_autocrypt)
711 rc |= SEC_AUTOCRYPT;
712#endif
713 }
714
715 if ((b->type == TYPE_MULTIPART) || (b->type == TYPE_MESSAGE))
716 {
717 SecurityFlags u = b->parts ? SEC_ALL_FLAGS : SEC_NO_FLAGS; /* Bits set in all parts */
718 SecurityFlags w = SEC_NO_FLAGS; /* Bits set in any part */
719
720 for (b = b->parts; b; b = b->next)
721 {
722 const SecurityFlags v = crypt_query(b);
723 u &= v;
724 w |= v;
725 }
726 rc |= u | (w & ~SEC_GOODSIGN);
727
728 if ((w & SEC_GOODSIGN) && !(u & SEC_GOODSIGN))
729 rc |= SEC_PARTSIGN;
730 }
731
732 return rc;
733}
SecurityFlags mutt_is_application_pgp(struct Body *b)
Does the message use PGP?
Definition: crypt.c:534
SecurityFlags mutt_is_multipart_signed(struct Body *b)
Is a message signed?
Definition: crypt.c:394
SecurityFlags mutt_is_application_smime(struct Body *b)
Does the message use S/MIME?
Definition: crypt.c:595
SecurityFlags mutt_is_malformed_multipart_pgp_encrypted(struct Body *b)
Check for malformed layout.
Definition: crypt.c:490
SecurityFlags crypt_query(struct Body *b)
Check out the type of encryption used.
Definition: crypt.c:673
@ TYPE_MESSAGE
Type: 'message/*'.
Definition: mime.h:35
#define SEC_ALL_FLAGS
Definition: lib.h:94
#define SEC_GOODSIGN
Email has a valid signature.
Definition: lib.h:80
#define SEC_BADSIGN
Email has a bad signature.
Definition: lib.h:81
#define SEC_PARTSIGN
Not all parts of the email is signed.
Definition: lib.h:82
bool badsig
Bad cryptographic signature (needed to check encrypted s/mime-signatures)
Definition: body.h:43
bool is_autocrypt
Flag autocrypt-decrypted messages for replying.
Definition: body.h:50
bool goodsig
Good cryptographic signature.
Definition: body.h:45
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◆ crypt_write_signed()

int crypt_write_signed ( struct Body b,
struct State state,
const char *  tempfile 
)

Write the message body/part.

Parameters
bBody to write
stateState to use
tempfileFile to write to
Return values
0Success
-1Error

Body/part A described by state state to the given TEMPFILE.

Definition at line 745 of file crypt.c.

746{
747 if (!WithCrypto)
748 return -1;
749
750 FILE *fp = mutt_file_fopen(tempfile, "w");
751 if (!fp)
752 {
753 mutt_perror("%s", tempfile);
754 return -1;
755 }
756
757 if (!mutt_file_seek(state->fp_in, b->hdr_offset, SEEK_SET))
758 {
759 mutt_file_fclose(&fp);
760 return -1;
761 }
762 size_t bytes = b->length + b->offset - b->hdr_offset;
763 bool hadcr = false;
764 while (bytes > 0)
765 {
766 const int c = fgetc(state->fp_in);
767 if (c == EOF)
768 break;
769
770 bytes--;
771
772 if (c == '\r')
773 {
774 hadcr = true;
775 }
776 else
777 {
778 if ((c == '\n') && !hadcr)
779 fputc('\r', fp);
780
781 hadcr = false;
782 }
783
784 fputc(c, fp);
785 }
786 mutt_file_fclose(&fp);
787
788 return 0;
789}
bool mutt_file_seek(FILE *fp, LOFF_T offset, int whence)
Wrapper for fseeko with error handling.
Definition: file.c:771
#define mutt_file_fclose(FP)
Definition: file.h:148
#define mutt_file_fopen(PATH, MODE)
Definition: file.h:147
#define mutt_perror(...)
Definition: logging2.h:93
LOFF_T offset
offset where the actual data begins
Definition: body.h:52
long hdr_offset
Offset in stream where the headers begin.
Definition: body.h:80
FILE * fp_in
File to read from.
Definition: state.h:49
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◆ crypt_convert_to_7bit()

void crypt_convert_to_7bit ( struct Body b)

Convert an email to 7bit encoding.

Parameters
bBody of email to convert

Definition at line 795 of file crypt.c.

796{
797 if (!WithCrypto)
798 return;
799
800 const bool c_pgp_strict_enc = cs_subset_bool(NeoMutt->sub, "pgp_strict_enc");
801 while (b)
802 {
803 if (b->type == TYPE_MULTIPART)
804 {
805 if (b->encoding != ENC_7BIT)
806 {
807 b->encoding = ENC_7BIT;
809 }
810 else if (((WithCrypto & APPLICATION_PGP) != 0) && c_pgp_strict_enc)
811 {
813 }
814 }
815 else if ((b->type == TYPE_MESSAGE) && !mutt_istr_equal(b->subtype, "delivery-status"))
816 {
817 if (b->encoding != ENC_7BIT)
819 }
820 else if (b->encoding == ENC_8BIT)
821 {
823 }
824 else if (b->encoding == ENC_BINARY)
825 {
826 b->encoding = ENC_BASE64;
827 }
828 else if (b->content && (b->encoding != ENC_BASE64) &&
829 (b->content->from || (b->content->space && c_pgp_strict_enc)))
830 {
832 }
833 b = b->next;
834 }
835}
void crypt_convert_to_7bit(struct Body *b)
Convert an email to 7bit encoding.
Definition: crypt.c:795
@ ENC_7BIT
7-bit text
Definition: mime.h:49
@ ENC_BINARY
Binary.
Definition: mime.h:53
@ ENC_BASE64
Base-64 encoded text.
Definition: mime.h:52
@ ENC_8BIT
8-bit text
Definition: mime.h:50
@ ENC_QUOTED_PRINTABLE
Quoted-printable text.
Definition: mime.h:51
void mutt_message_to_7bit(struct Body *b, FILE *fp, struct ConfigSubset *sub)
Convert an email's MIME parts to 7-bit.
Definition: sendlib.c:258
struct Content * content
Detailed info about the content of the attachment.
Definition: body.h:69
unsigned int encoding
content-transfer-encoding, ContentEncoding
Definition: body.h:41
bool space
Whitespace at the end of lines?
Definition: content.h:43
bool from
Has a line beginning with "From "?
Definition: content.h:45
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◆ crypt_extract_keys_from_messages()

void crypt_extract_keys_from_messages ( struct Mailbox m,
struct EmailArray *  ea 
)

Extract keys from a message.

Parameters
mMailbox
eaArray of Emails to process

The extracted keys will be added to the user's keyring.

Definition at line 844 of file crypt.c.

845{
846 if (!WithCrypto)
847 return;
848
849 struct Buffer *tempfname = buf_pool_get();
850 buf_mktemp(tempfname);
851 FILE *fp_out = mutt_file_fopen(buf_string(tempfname), "w");
852 if (!fp_out)
853 {
854 mutt_perror("%s", buf_string(tempfname));
855 goto cleanup;
856 }
857
860
861 struct Email **ep = NULL;
862 ARRAY_FOREACH(ep, ea)
863 {
864 struct Email *e = *ep;
865 struct Message *msg = mx_msg_open(m, e);
866 if (!msg)
867 {
868 continue;
869 }
872 {
873 mx_msg_close(m, &msg);
874 mutt_file_fclose(&fp_out);
875 break;
876 }
877
878 if (((WithCrypto & APPLICATION_PGP) != 0) && (e->security & APPLICATION_PGP))
879 {
881 fflush(fp_out);
882
883 mutt_endwin();
884 puts(_("Trying to extract PGP keys...\n"));
886 }
887
889 {
890 const bool encrypt = e->security & SEC_ENCRYPT;
891 mutt_copy_message(fp_out, e, msg,
894 CH_NO_FLAGS, 0);
895 fflush(fp_out);
896
897 const char *mbox = NULL;
898 if (!TAILQ_EMPTY(&e->env->from))
899 {
901 mbox = buf_string(TAILQ_FIRST(&e->env->from)->mailbox);
902 }
903 else if (!TAILQ_EMPTY(&e->env->sender))
904 {
906 mbox = buf_string(TAILQ_FIRST(&e->env->sender)->mailbox);
907 }
908 if (mbox)
909 {
910 mutt_endwin();
911 puts(_("Trying to extract S/MIME certificates..."));
912 crypt_smime_invoke_import(buf_string(tempfname), mbox);
913 }
914 }
915 mx_msg_close(m, &msg);
916
917 rewind(fp_out);
918 }
919
920 mutt_file_fclose(&fp_out);
921 if (isendwin())
923
924 mutt_file_unlink(buf_string(tempfname));
925
927 OptDontHandlePgpKeys = false;
928
929cleanup:
930 buf_pool_release(&tempfname);
931}
void mutt_expand_aliases(struct AddressList *al)
Expand aliases in a List of Addresses.
Definition: alias.c:300
#define ARRAY_FOREACH(elem, head)
Iterate over all elements of the array.
Definition: array.h:212
void mutt_parse_mime_message(struct Email *e, FILE *fp)
Parse a MIME email.
Definition: attachments.c:597
int mutt_copy_message(FILE *fp_out, struct Email *e, struct Message *msg, CopyMessageFlags cmflags, CopyHeaderFlags chflags, int wraplen)
Copy a message from a Mailbox.
Definition: copy.c:908
#define MUTT_CM_DECODE
Decode the message body into text/plain.
Definition: copy.h:40
#define MUTT_CM_CHARCONV
Perform character set conversions.
Definition: copy.h:44
#define MUTT_CM_DECODE_SMIME
Used for decoding S/MIME messages.
Definition: copy.h:48
#define MUTT_CM_NO_FLAGS
No flags are set.
Definition: copy.h:37
#define MUTT_CM_DECODE_CRYPT
Definition: copy.h:50
#define MUTT_CM_NOHEADER
Don't copy the message header.
Definition: copy.h:38
#define CH_NO_FLAGS
No flags are set.
Definition: copy.h:53
void crypt_pgp_invoke_import(const char *fname)
Wrapper for CryptModuleSpecs::pgp_invoke_import()
Definition: cryptglue.c:363
void crypt_smime_invoke_import(const char *infile, const char *mailbox)
Wrapper for CryptModuleSpecs::smime_invoke_import()
Definition: cryptglue.c:507
int mutt_any_key_to_continue(const char *s)
Prompt the user to 'press any key' and wait.
Definition: curs_lib.c:175
void mutt_file_unlink(const char *s)
Delete a file, carefully.
Definition: file.c:216
bool OptDontHandlePgpKeys
(pseudo) used to extract PGP keys
Definition: globals.c:64
int mx_msg_close(struct Mailbox *m, struct Message **ptr)
Close a message.
Definition: mx.c:1178
struct Message * mx_msg_open(struct Mailbox *m, struct Email *e)
Return a stream pointer for a message.
Definition: mx.c:1132
struct Buffer * buf_pool_get(void)
Get a Buffer from the pool.
Definition: pool.c:81
void buf_pool_release(struct Buffer **ptr)
Return a Buffer to the pool.
Definition: pool.c:94
#define TAILQ_EMPTY(head)
Definition: queue.h:721
String manipulation buffer.
Definition: buffer.h:36
The envelope/body of an email.
Definition: email.h:39
struct AddressList sender
Email's sender.
Definition: envelope.h:63
A local copy of an email.
Definition: message.h:34
FILE * fp
pointer to the message data
Definition: message.h:35
#define buf_mktemp(buf)
Definition: tmp.h:33
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◆ crypt_get_keys()

int crypt_get_keys ( struct Email e,
char **  keylist,
bool  oppenc_mode 
)

Check we have all the keys we need.

Parameters
[in]eEmail with addresses to match
[out]keylistKeys needed
[in]oppenc_modeIf true, use opportunistic encryption
Return values
0Success
-1Error

Do a quick check to make sure that we can find all of the encryption keys if the user has requested this service. Return the list of keys in KEYLIST. If oppenc_mode is true, only keys that can be determined without prompting will be used.

Definition at line 947 of file crypt.c.

948{
949 if (!WithCrypto)
950 return 0;
951
952 struct AddressList addrlist = TAILQ_HEAD_INITIALIZER(addrlist);
953 const char *fqdn = mutt_fqdn(true, NeoMutt->sub);
954 const char *self_encrypt = NULL;
955
956 /* Do a quick check to make sure that we can find all of the encryption
957 * keys if the user has requested this service. */
958
959 *keylist = NULL;
960
961#ifdef USE_AUTOCRYPT
962 if (!oppenc_mode && (e->security & SEC_AUTOCRYPT))
963 {
965 return -1;
966 return 0;
967 }
968#endif
969
971 OptPgpCheckTrust = true;
972
973 mutt_addrlist_copy(&addrlist, &e->env->to, false);
974 mutt_addrlist_copy(&addrlist, &e->env->cc, false);
975 mutt_addrlist_copy(&addrlist, &e->env->bcc, false);
976 mutt_addrlist_qualify(&addrlist, fqdn);
977 mutt_addrlist_dedupe(&addrlist);
978
979 if (oppenc_mode || (e->security & SEC_ENCRYPT))
980 {
981 if (((WithCrypto & APPLICATION_PGP) != 0) && (e->security & APPLICATION_PGP))
982 {
983 *keylist = crypt_pgp_find_keys(&addrlist, oppenc_mode);
984 if (!*keylist)
985 {
986 mutt_addrlist_clear(&addrlist);
987 return -1;
988 }
989 OptPgpCheckTrust = false;
990 const bool c_pgp_self_encrypt = cs_subset_bool(NeoMutt->sub, "pgp_self_encrypt");
991 const char *const c_pgp_default_key = cs_subset_string(NeoMutt->sub, "pgp_default_key");
992 const enum QuadOption c_pgp_encrypt_self = cs_subset_quad(NeoMutt->sub, "pgp_encrypt_self");
993 if (c_pgp_self_encrypt || (c_pgp_encrypt_self == MUTT_YES))
994 self_encrypt = c_pgp_default_key;
995 }
997 {
998 *keylist = crypt_smime_find_keys(&addrlist, oppenc_mode);
999 if (!*keylist)
1000 {
1001 mutt_addrlist_clear(&addrlist);
1002 return -1;
1003 }
1004 const bool c_smime_self_encrypt = cs_subset_bool(NeoMutt->sub, "smime_self_encrypt");
1005 const char *const c_smime_default_key = cs_subset_string(NeoMutt->sub, "smime_default_key");
1006 const enum QuadOption c_smime_encrypt_self = cs_subset_quad(NeoMutt->sub, "smime_encrypt_self");
1007 if (c_smime_self_encrypt || (c_smime_encrypt_self == MUTT_YES))
1008 self_encrypt = c_smime_default_key;
1009 }
1010 }
1011
1012 if (!oppenc_mode && self_encrypt)
1013 {
1014 const size_t keylist_size = mutt_str_len(*keylist);
1015 mutt_mem_realloc(keylist, keylist_size + mutt_str_len(self_encrypt) + 2);
1016 sprintf(*keylist + keylist_size, " %s", self_encrypt);
1017 }
1018
1019 mutt_addrlist_clear(&addrlist);
1020
1021 return 0;
1022}
void mutt_addrlist_copy(struct AddressList *dst, const struct AddressList *src, bool prune)
Copy a list of addresses into another list.
Definition: address.c:765
void mutt_addrlist_qualify(struct AddressList *al, const char *host)
Expand local names in an Address list using a hostname.
Definition: address.c:680
void mutt_addrlist_clear(struct AddressList *al)
Unlink and free all Address in an AddressList.
Definition: address.c:1464
void mutt_addrlist_dedupe(struct AddressList *al)
Remove duplicate addresses.
Definition: address.c:1401
@ AUTOCRYPT_REC_NO
Do no use Autocrypt.
Definition: lib.h:160
enum AutocryptRec mutt_autocrypt_ui_recommendation(const struct Email *e, char **keylist)
Get the recommended action for an Email.
Definition: autocrypt.c:560
const char * cs_subset_string(const struct ConfigSubset *sub, const char *name)
Get a string config item by name.
Definition: helpers.c:292
enum QuadOption cs_subset_quad(const struct ConfigSubset *sub, const char *name)
Get a quad-value config item by name.
Definition: helpers.c:193
char * crypt_smime_find_keys(struct AddressList *addrlist, bool oppenc_mode)
Wrapper for CryptModuleSpecs::find_keys()
Definition: cryptglue.c:474
char * crypt_pgp_find_keys(struct AddressList *addrlist, bool oppenc_mode)
Wrapper for CryptModuleSpecs::find_keys()
Definition: cryptglue.c:315
bool OptPgpCheckTrust
(pseudo) used by dlg_pgp()
Definition: globals.c:73
void mutt_mem_realloc(void *ptr, size_t size)
Resize a block of memory on the heap.
Definition: memory.c:114
QuadOption
Possible values for a quad-option.
Definition: quad.h:36
#define TAILQ_HEAD_INITIALIZER(head)
Definition: queue.h:637
const char * mutt_fqdn(bool may_hide_host, const struct ConfigSubset *sub)
Get the Fully-Qualified Domain Name.
Definition: sendlib.c:706
struct AddressList to
Email's 'To' list.
Definition: envelope.h:60
struct AddressList cc
Email's 'Cc' list.
Definition: envelope.h:61
struct AddressList bcc
Email's 'Bcc' list.
Definition: envelope.h:62
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◆ crypt_opportunistic_encrypt()

void crypt_opportunistic_encrypt ( struct Email e)

Can all recipients be determined.

Parameters
eEmail

Check if all recipients keys can be automatically determined. Enable encryption if they can, otherwise disable encryption.

Definition at line 1031 of file crypt.c.

1032{
1033 if (!WithCrypto)
1034 return;
1035
1036 const bool c_crypt_opportunistic_encrypt = cs_subset_bool(NeoMutt->sub, "crypt_opportunistic_encrypt");
1037 if (!(c_crypt_opportunistic_encrypt && (e->security & SEC_OPPENCRYPT)))
1038 return;
1039
1040 char *pgpkeylist = NULL;
1041
1042 crypt_get_keys(e, &pgpkeylist, true);
1043 if (pgpkeylist)
1044 {
1045 e->security |= SEC_ENCRYPT;
1046 FREE(&pgpkeylist);
1047 }
1048 else
1049 {
1050 e->security &= ~SEC_ENCRYPT;
1051 }
1052}
int crypt_get_keys(struct Email *e, char **keylist, bool oppenc_mode)
Check we have all the keys we need.
Definition: crypt.c:947
#define FREE(x)
Definition: memory.h:45
#define SEC_OPPENCRYPT
Opportunistic encrypt mode.
Definition: lib.h:86
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◆ crypt_fetch_signatures()

static void crypt_fetch_signatures ( struct Body ***  b_sigs,
struct Body b,
int *  n 
)
static

Create an array of an emails parts.

Parameters
[out]b_sigsArray of Body parts
[in]bBody part to examine
[out]nCumulative count of parts

Definition at line 1060 of file crypt.c.

1061{
1062 if (!WithCrypto)
1063 return;
1064
1065 for (; b; b = b->next)
1066 {
1067 if (b->type == TYPE_MULTIPART)
1068 {
1069 crypt_fetch_signatures(b_sigs, b->parts, n);
1070 }
1071 else
1072 {
1073 if ((*n % 5) == 0)
1074 mutt_mem_realloc(b_sigs, (*n + 6) * sizeof(struct Body **));
1075
1076 (*b_sigs)[(*n)++] = b;
1077 }
1078 }
1079}
static void crypt_fetch_signatures(struct Body ***b_sigs, struct Body *b, int *n)
Create an array of an emails parts.
Definition: crypt.c:1060
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◆ mutt_should_hide_protected_subject()

bool mutt_should_hide_protected_subject ( struct Email e)

Should NeoMutt hide the protected subject?

Parameters
eEmail to test
Return values
trueThe subject should be protected

Definition at line 1086 of file crypt.c.

1087{
1088 const bool c_crypt_protected_headers_write = cs_subset_bool(NeoMutt->sub, "crypt_protected_headers_write");
1089 const char *const c_crypt_protected_headers_subject =
1090 cs_subset_string(NeoMutt->sub, "crypt_protected_headers_subject");
1091 if (c_crypt_protected_headers_write && (e->security & (SEC_ENCRYPT | SEC_AUTOCRYPT)) &&
1092 !(e->security & SEC_INLINE) && c_crypt_protected_headers_subject)
1093 {
1094 return true;
1095 }
1096
1097 return false;
1098}
#define SEC_INLINE
Email has an inline signature.
Definition: lib.h:85
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◆ crypt_get_fingerprint_or_id()

const char * crypt_get_fingerprint_or_id ( const char *  p,
const char **  pphint,
const char **  ppl,
const char **  pps 
)

Get the fingerprint or long key ID.

Parameters
[in]pString to examine
[out]pphintStart of string to be passed to pgp_add_string_to_hints() or crypt_add_string_to_hints()
[out]pplStart of long key ID if detected, else NULL
[out]ppsStart of short key ID if detected, else NULL
Return values
ptrCopy of fingerprint, if any, stripped of all spaces. Must be FREE'd by caller
NULLOtherwise

Obtain pointers to fingerprint or short or long key ID, if any.

Upon return, at most one of return, *ppl and *pps pointers is non-NULL, indicating the longest fingerprint or ID found, if any.

Definition at line 1275 of file crypt.c.

1277{
1278 const char *ps = NULL, *pl = NULL, *phint = NULL;
1279 char *pfcopy = NULL, *s1 = NULL, *s2 = NULL;
1280 char c;
1281 int isid;
1282 size_t hexdigits;
1283
1284 /* User input may be partial name, fingerprint or short or long key ID,
1285 * independent of `$pgp_long_ids`.
1286 * Fingerprint without spaces is 40 hex digits (SHA-1) or 32 hex digits (MD5).
1287 * Strip leading "0x" for key ID detection and prepare pl and ps to indicate
1288 * if an ID was found and to simplify logic in the key loop's inner
1289 * condition of the caller. */
1290
1291 char *pf = mutt_str_skip_whitespace(p);
1292 if (mutt_istr_startswith(pf, "0x"))
1293 pf += 2;
1294
1295 /* Check if a fingerprint is given, must be hex digits only, blanks
1296 * separating groups of 4 hex digits are allowed. Also pre-check for ID. */
1297 isid = 2; /* unknown */
1298 hexdigits = 0;
1299 s1 = pf;
1300 do
1301 {
1302 c = *(s1++);
1303 if ((('0' <= c) && (c <= '9')) || (('A' <= c) && (c <= 'F')) ||
1304 (('a' <= c) && (c <= 'f')))
1305 {
1306 hexdigits++;
1307 if (isid == 2)
1308 isid = 1; /* it is an ID so far */
1309 }
1310 else if (c)
1311 {
1312 isid = 0; /* not an ID */
1313 if ((c == ' ') && ((hexdigits % 4) == 0))
1314 ; /* skip blank before or after 4 hex digits */
1315 else
1316 break; /* any other character or position */
1317 }
1318 } while (c);
1319
1320 /* If at end of input, check for correct fingerprint length and copy if. */
1321 pfcopy = (!c && ((hexdigits == 40) || (hexdigits == 32)) ? mutt_str_dup(pf) : NULL);
1322
1323 if (pfcopy)
1324 {
1325 /* Use pfcopy to strip all spaces from fingerprint and as hint. */
1326 s1 = pfcopy;
1327 s2 = pfcopy;
1328 do
1329 {
1330 *(s1++) = *(s2 = mutt_str_skip_whitespace(s2));
1331 } while (*(s2++));
1332
1333 phint = pfcopy;
1334 ps = NULL;
1335 pl = NULL;
1336 }
1337 else
1338 {
1339 phint = p;
1340 ps = NULL;
1341 pl = NULL;
1342 if (isid == 1)
1343 {
1344 if (mutt_str_len(pf) == 16)
1345 pl = pf; /* long key ID */
1346 else if (mutt_str_len(pf) == 8)
1347 ps = pf; /* short key ID */
1348 }
1349 }
1350
1351 *pphint = phint;
1352 *ppl = pl;
1353 *pps = ps;
1354 return pfcopy;
1355}
char * mutt_str_dup(const char *str)
Copy a string, safely.
Definition: string.c:253
char * mutt_str_skip_whitespace(const char *p)
Find the first non-whitespace character in a string.
Definition: string.c:600
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◆ crypt_is_numerical_keyid()

bool crypt_is_numerical_keyid ( const char *  s)

Is this a numerical keyid.

Parameters
sKey to test
Return values
trueKeyid is numeric

Check if a crypt-hook value is a key id.

Definition at line 1364 of file crypt.c.

1365{
1366 /* or should we require the "0x"? */
1367 if (mutt_strn_equal(s, "0x", 2))
1368 s += 2;
1369 if (strlen(s) % 8)
1370 return false;
1371 while (*s)
1372 if (!strchr("0123456789ABCDEFabcdef", *s++))
1373 return false;
1374
1375 return true;
1376}
bool mutt_strn_equal(const char *a, const char *b, size_t num)
Check for equality of two strings (to a maximum), safely.
Definition: string.c:474
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