lib.h File Reference

Autocrypt end-to-end encryption. More...

#include "config.h"
#include <sqlite3.h>
#include <stdbool.h>
#include <stdio.h>
#include "mutt/lib.h"
#include "module_data.h"

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Data Structures
struct	AutocryptAccount
	Autocrypt account. More...
struct	AutocryptPeer
	Autocrypt peer. More...
struct	AutocryptPeerHistory
	Autocrypt peer history. More...
struct	AutocryptGossipHistory
	Autocrypt gossip history. More...

Enumerations
enum	AutocryptRec {   AUTOCRYPT_REC_OFF , AUTOCRYPT_REC_NO , AUTOCRYPT_REC_DISCOURAGE , AUTOCRYPT_REC_AVAILABLE ,   AUTOCRYPT_REC_YES }
	Recommendation. More...

Functions
	ARRAY_HEAD (AutocryptAccountArray, struct AutocryptAccount *)
void	autocrypt_init_keys (struct NeoMutt *n, struct SubMenu *sm_generic)
	Initialise the Autocrypt Keybindings - Implements ::init_keys_api.
void	dlg_autocrypt (void)
	Display the Autocrypt account Menu -.
void	mutt_autocrypt_cleanup (struct AutocryptModuleData *mod_data)
	Shutdown Autocrypt.
int	mutt_autocrypt_generate_gossip_list (struct Email *e)
	Create the gossip list headers.
int	mutt_autocrypt_init (bool can_create)
	Initialise Autocrypt.
int	mutt_autocrypt_process_autocrypt_header (struct Email *e, struct Envelope *env)
	Parse an Autocrypt email header.
int	mutt_autocrypt_process_gossip_header (struct Email *e, struct Envelope *prot_headers)
	Parse an Autocrypt email gossip header.
int	mutt_autocrypt_set_sign_as_default_key (struct Email *e)
	Set the Autocrypt default key for signing.
enum AutocryptRec	mutt_autocrypt_ui_recommendation (const struct Email *e, char **keylist)
	Get the recommended action for an Email.
int	mutt_autocrypt_write_autocrypt_header (struct Envelope *env, FILE *fp)
	Write the Autocrypt header to a file.
int	mutt_autocrypt_write_gossip_headers (struct Envelope *env, FILE *fp)
	Write the Autocrypt gossip headers to a file.

Detailed Description

Autocrypt end-to-end encryption.

Authors

• Kevin J. McCarthy
• Richard Russon

Copyright

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version.

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 lib.h.

Enumeration Type Documentation

AutocryptRec

enum AutocryptRec

Recommendation.

Enumerator
AUTOCRYPT_REC_OFF	No recommendations.
AUTOCRYPT_REC_NO	Do no use Autocrypt.
AUTOCRYPT_REC_DISCOURAGE	Prefer not to use Autocrypt.
AUTOCRYPT_REC_AVAILABLE	Autocrypt is available.
AUTOCRYPT_REC_YES	Autocrypt should be used.

Definition at line 165 of file lib.h.

{
  AUTOCRYPT_REC_OFF,        
  AUTOCRYPT_REC_NO,         
  AUTOCRYPT_REC_DISCOURAGE, 
  AUTOCRYPT_REC_AVAILABLE,  
  AUTOCRYPT_REC_YES,        
};

Function Documentation

ARRAY_HEAD()

ARRAY_HEAD	(	AutocryptAccountArray	,
		struct AutocryptAccount *	)

autocrypt_init_keys()

void autocrypt_init_keys	(	struct NeoMutt *	n,
		struct SubMenu *	sm_generic )

Initialise the Autocrypt Keybindings - Implements ::init_keys_api.

Definition at line 75 of file functions.c.

{
  struct AutocryptModuleData *mod_data = neomutt_get_module_data(n, MODULE_ID_AUTOCRYPT);
  ASSERT(mod_data);
 
  struct MenuDefinition *md = NULL;
  struct SubMenu *sm = NULL;
 
  sm = km_register_submenu(OpAutocrypt);
  md = km_register_menu(MENU_AUTOCRYPT, "autocrypt");
  km_menu_add_submenu(md, sm);
  km_menu_add_submenu(md, sm_generic);
  km_menu_add_bindings(md, AutocryptDefaultBindings);
 
  mod_data->menu_autocrypt = md;
}

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mutt_autocrypt_cleanup()

void mutt_autocrypt_cleanup

(

struct AutocryptModuleData *

mod_data

)

Shutdown Autocrypt.

Parameters

mod_data

Autocrypt module data

Definition at line 136 of file autocrypt.c.

{
  mutt_autocrypt_db_close(mod_data);
}

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mutt_autocrypt_generate_gossip_list()

int mutt_autocrypt_generate_gossip_list

(

struct Email *

e

)

Create the gossip list headers.

Parameters

e

Email

Return values

0	Success
-1	Error

Definition at line 844 of file autocrypt.c.

{
  int rc = -1;
  struct AutocryptPeer *peer = NULL;
  struct AutocryptAccount *account = NULL;
  struct Address *recip = NULL;
 
  const bool c_autocrypt = cs_subset_bool(NeoMutt->sub, "autocrypt");
  if (!c_autocrypt || mutt_autocrypt_init(false) || !e)
    return -1;
 
  struct Envelope *mime_headers = e->body->mime_headers;
  if (!mime_headers)
    mime_headers = e->body->mime_headers = mutt_env_new();
  mutt_autocrypthdr_free(&mime_headers->autocrypt_gossip);
 
  struct AddressList recips = TAILQ_HEAD_INITIALIZER(recips);
 
  mutt_addrlist_copy(&recips, &e->env->to, false);
  mutt_addrlist_copy(&recips, &e->env->cc, false);
 
  TAILQ_FOREACH(recip, &recips, entries)
  {
    /* At this point, we just accept missing keys and include what we can. */
    if (mutt_autocrypt_db_peer_get(recip, &peer) <= 0)
      continue;
 
    const char *keydata = NULL;
    if (mutt_autocrypt_gpgme_is_valid_key(peer->keyid))
      keydata = peer->keydata;
    else if (mutt_autocrypt_gpgme_is_valid_key(peer->gossip_keyid))
      keydata = peer->gossip_keydata;
 
    if (keydata)
    {
      struct AutocryptHeader *gossip = mutt_autocrypthdr_new();
      gossip->addr = mutt_str_dup(peer->email_addr);
      gossip->keydata = mutt_str_dup(keydata);
      gossip->next = mime_headers->autocrypt_gossip;
      mime_headers->autocrypt_gossip = gossip;
    }
 
    mutt_autocrypt_db_peer_free(&peer);
  }
 
  TAILQ_FOREACH(recip, &e->env->reply_to, entries)
  {
    const char *addr = NULL;
    const char *keydata = NULL;
    if (mutt_autocrypt_db_account_get(recip, &account) > 0)
    {
      addr = account->email_addr;
      keydata = account->keydata;
    }
    else if (mutt_autocrypt_db_peer_get(recip, &peer) > 0)
    {
      addr = peer->email_addr;
      if (mutt_autocrypt_gpgme_is_valid_key(peer->keyid))
        keydata = peer->keydata;
      else if (mutt_autocrypt_gpgme_is_valid_key(peer->gossip_keyid))
        keydata = peer->gossip_keydata;
    }
 
    if (keydata)
    {
      struct AutocryptHeader *gossip = mutt_autocrypthdr_new();
      gossip->addr = mutt_str_dup(addr);
      gossip->keydata = mutt_str_dup(keydata);
      gossip->next = mime_headers->autocrypt_gossip;
      mime_headers->autocrypt_gossip = gossip;
    }
    mutt_autocrypt_db_account_free(&account);
    mutt_autocrypt_db_peer_free(&peer);
  }
 
  rc = 0;
 
  mutt_addrlist_clear(&recips);
  mutt_autocrypt_db_account_free(&account);
  mutt_autocrypt_db_peer_free(&peer);
  return rc;
}

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mutt_autocrypt_init()

int mutt_autocrypt_init

(

bool

can_create

)

Initialise Autocrypt.

Parameters

can_create

If true, directories may be created

Return values

0	Success
-1	Error

Definition at line 104 of file autocrypt.c.

{
  struct AutocryptModuleData *mod_data = neomutt_get_module_data(NeoMutt, MODULE_ID_AUTOCRYPT);
  if (mod_data->autocrypt_db)
    return 0;
 
  const bool c_autocrypt = cs_subset_bool(NeoMutt->sub, "autocrypt");
  const char *const c_autocrypt_dir = cs_subset_path(NeoMutt->sub, "autocrypt_dir");
  if (!c_autocrypt || !c_autocrypt_dir)
    return -1;
 
  if (autocrypt_dir_init(can_create))
    goto bail;
 
  if (mutt_autocrypt_gpgme_init())
    goto bail;
 
  if (mutt_autocrypt_db_init(can_create))
    goto bail;
 
  return 0;
 
bail:
  cs_subset_str_native_set(NeoMutt->sub, "autocrypt", false, NULL);
  mutt_autocrypt_db_close(mod_data);
  return -1;
}

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mutt_autocrypt_process_autocrypt_header()

int mutt_autocrypt_process_autocrypt_header	(	struct Email *	e,
		struct Envelope *	env )

Parse an Autocrypt email header.

Parameters

e	Email
env	Envelope

Return values

0	Success
-1	Error

Definition at line 263 of file autocrypt.c.

{
  struct AutocryptHeader *valid_ac_hdr = NULL;
  struct AutocryptPeer *peer = NULL;
  struct AutocryptPeerHistory *peerhist = NULL;
  struct Buffer *keyid = NULL;
  bool update_db = false, insert_db = false, insert_db_history = false, import_gpg = false;
  int rc = -1;
 
  const bool c_autocrypt = cs_subset_bool(NeoMutt->sub, "autocrypt");
  if (!c_autocrypt)
    return 0;
 
  if (mutt_autocrypt_init(false) != 0)
    return -1;
 
  if (!e || !e->body || !env)
    return 0;
 
  /* 1.1 spec says to skip emails with more than one From header */
  struct Address *from = TAILQ_FIRST(&env->from);
  if (!from || TAILQ_NEXT(from, entries))
    return 0;
 
  /* 1.1 spec also says to skip multipart/report emails */
  if ((e->body->type == TYPE_MULTIPART) && mutt_istr_equal(e->body->subtype, "report"))
  {
    return 0;
  }
 
  /* Ignore emails that appear to be more than a week in the future,
   * since they can block all future updates during that time. */
  if (e->date_sent > (mutt_date_now() + (7 * 24 * 60 * 60)))
    return 0;
 
  for (struct AutocryptHeader *ac_hdr = env->autocrypt; ac_hdr; ac_hdr = ac_hdr->next)
  {
    if (ac_hdr->invalid)
      continue;
 
    /* NOTE: this assumes the processing is occurring right after
     * mutt_parse_rfc822_line() and the from ADDR is still in the same
     * form (intl) as the autocrypt header addr field */
    if (!mutt_istr_equal(buf_string(from->mailbox), ac_hdr->addr))
      continue;
 
    /* 1.1 spec says ignore all, if more than one valid header is found. */
    if (valid_ac_hdr)
    {
      valid_ac_hdr = NULL;
      break;
    }
    valid_ac_hdr = ac_hdr;
  }
 
  if (mutt_autocrypt_db_peer_get(from, &peer) < 0)
    goto cleanup;
 
  if (peer)
  {
    if (e->date_sent <= peer->autocrypt_timestamp)
    {
      rc = 0;
      goto cleanup;
    }
 
    if (e->date_sent > peer->last_seen)
    {
      update_db = true;
      peer->last_seen = e->date_sent;
    }
 
    if (valid_ac_hdr)
    {
      update_db = true;
      peer->autocrypt_timestamp = e->date_sent;
      peer->prefer_encrypt = valid_ac_hdr->prefer_encrypt;
      if (!mutt_str_equal(peer->keydata, valid_ac_hdr->keydata))
      {
        import_gpg = true;
        insert_db_history = true;
        mutt_str_replace(&peer->keydata, valid_ac_hdr->keydata);
      }
    }
  }
  else if (valid_ac_hdr)
  {
    import_gpg = true;
    insert_db = true;
    insert_db_history = true;
  }
 
  if (!(import_gpg || insert_db || update_db))
  {
    rc = 0;
    goto cleanup;
  }
 
  if (!peer)
  {
    peer = mutt_autocrypt_db_peer_new();
    peer->last_seen = e->date_sent;
    peer->autocrypt_timestamp = e->date_sent;
    peer->keydata = mutt_str_dup(valid_ac_hdr->keydata);
    peer->prefer_encrypt = valid_ac_hdr->prefer_encrypt;
  }
 
  if (import_gpg)
  {
    keyid = buf_pool_get();
    if (mutt_autocrypt_gpgme_import_key(peer->keydata, keyid))
      goto cleanup;
    mutt_str_replace(&peer->keyid, buf_string(keyid));
  }
 
  if (insert_db && mutt_autocrypt_db_peer_insert(from, peer))
    goto cleanup;
 
  if (update_db && mutt_autocrypt_db_peer_update(peer))
    goto cleanup;
 
  if (insert_db_history)
  {
    peerhist = mutt_autocrypt_db_peer_history_new();
    peerhist->email_msgid = mutt_str_dup(env->message_id);
    peerhist->timestamp = e->date_sent;
    peerhist->keydata = mutt_str_dup(peer->keydata);
    if (mutt_autocrypt_db_peer_history_insert(from, peerhist))
      goto cleanup;
  }
 
  rc = 0;
 
cleanup:
  mutt_autocrypt_db_peer_free(&peer);
  mutt_autocrypt_db_peer_history_free(&peerhist);
  buf_pool_release(&keyid);
 
  return rc;
}

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mutt_autocrypt_process_gossip_header()

int mutt_autocrypt_process_gossip_header	(	struct Email *	e,
		struct Envelope *	prot_headers )

Parse an Autocrypt email gossip header.

Parameters

e	Email
prot_headers	Envelope with protected headers

Return values

0	Success
-1	Error

Definition at line 411 of file autocrypt.c.

{
  struct AutocryptPeer *peer = NULL;
  struct AutocryptGossipHistory *gossip_hist = NULL;
  struct Buffer *keyid = NULL;
  struct Address *peer_addr = NULL;
  struct Address ac_hdr_addr = { 0 };
  ac_hdr_addr.mailbox = buf_new(NULL);
  struct AddressList recips = TAILQ_HEAD_INITIALIZER(recips);
  bool update_db = false, insert_db = false, insert_db_history = false, import_gpg = false;
  int rc = -1;
 
  const bool c_autocrypt = cs_subset_bool(NeoMutt->sub, "autocrypt");
  if (!c_autocrypt)
  {
    rc = 0;
    goto cleanup;
  }
 
  if (mutt_autocrypt_init(false) != 0)
    goto cleanup;
 
  if (!e || !e->env || !prot_headers)
  {
    rc = 0;
    goto cleanup;
  }
 
  struct Envelope *env = e->env;
 
  struct Address *from = TAILQ_FIRST(&env->from);
  if (!from)
  {
    rc = 0;
    goto cleanup;
  }
 
  /* Ignore emails that appear to be more than a week in the future,
   * since they can block all future updates during that time. */
  if (e->date_sent > (mutt_date_now() + (7 * 24 * 60 * 60)))
  {
    rc = 0;
    goto cleanup;
  }
 
  keyid = buf_pool_get();
 
  /* Normalize the recipient list for comparison */
  mutt_addrlist_copy(&recips, &env->to, false);
  mutt_addrlist_copy(&recips, &env->cc, false);
  mutt_addrlist_copy(&recips, &env->reply_to, false);
  mutt_autocrypt_db_normalize_addrlist(&recips);
 
  for (struct AutocryptHeader *ac_hdr = prot_headers->autocrypt_gossip; ac_hdr;
       ac_hdr = ac_hdr->next)
  {
    if (ac_hdr->invalid)
      continue;
 
    /* normalize for comparison against recipient list */
    buf_strcpy(ac_hdr_addr.mailbox, ac_hdr->addr);
    ac_hdr_addr.is_intl = true;
    ac_hdr_addr.intl_checked = true;
    mutt_autocrypt_db_normalize_addr(&ac_hdr_addr);
 
    /* Check to make sure the address is in the recipient list. */
    TAILQ_FOREACH(peer_addr, &recips, entries)
    {
      if (buf_str_equal(peer_addr->mailbox, ac_hdr_addr.mailbox))
        break;
    }
 
    if (!peer_addr)
      continue;
 
    if (mutt_autocrypt_db_peer_get(peer_addr, &peer) < 0)
      goto cleanup;
 
    if (peer)
    {
      if (e->date_sent <= peer->gossip_timestamp)
      {
        mutt_autocrypt_db_peer_free(&peer);
        continue;
      }
 
      update_db = true;
      peer->gossip_timestamp = e->date_sent;
      /* This is slightly different from the autocrypt 1.1 spec.
       * Avoid setting an empty peer.gossip_keydata with a value that matches
       * the current peer.keydata. */
      if ((peer->gossip_keydata && !mutt_str_equal(peer->gossip_keydata, ac_hdr->keydata)) ||
          (!peer->gossip_keydata && !mutt_str_equal(peer->keydata, ac_hdr->keydata)))
      {
        import_gpg = true;
        insert_db_history = true;
        mutt_str_replace(&peer->gossip_keydata, ac_hdr->keydata);
      }
    }
    else
    {
      import_gpg = true;
      insert_db = true;
      insert_db_history = true;
    }
 
    if (!peer)
    {
      peer = mutt_autocrypt_db_peer_new();
      peer->gossip_timestamp = e->date_sent;
      peer->gossip_keydata = mutt_str_dup(ac_hdr->keydata);
    }
 
    if (import_gpg)
    {
      if (mutt_autocrypt_gpgme_import_key(peer->gossip_keydata, keyid))
        goto cleanup;
      mutt_str_replace(&peer->gossip_keyid, buf_string(keyid));
    }
 
    if (insert_db && mutt_autocrypt_db_peer_insert(peer_addr, peer))
      goto cleanup;
 
    if (update_db && mutt_autocrypt_db_peer_update(peer))
      goto cleanup;
 
    if (insert_db_history)
    {
      gossip_hist = mutt_autocrypt_db_gossip_history_new();
      gossip_hist->sender_email_addr = buf_strdup(from->mailbox);
      gossip_hist->email_msgid = mutt_str_dup(env->message_id);
      gossip_hist->timestamp = e->date_sent;
      gossip_hist->gossip_keydata = mutt_str_dup(peer->gossip_keydata);
      if (mutt_autocrypt_db_gossip_history_insert(peer_addr, gossip_hist))
        goto cleanup;
    }
 
    mutt_autocrypt_db_peer_free(&peer);
    mutt_autocrypt_db_gossip_history_free(&gossip_hist);
    buf_reset(keyid);
    update_db = false;
    insert_db = false;
    insert_db_history = false;
    import_gpg = false;
  }
 
  rc = 0;
 
cleanup:
  buf_free(&ac_hdr_addr.mailbox);
  mutt_addrlist_clear(&recips);
  mutt_autocrypt_db_peer_free(&peer);
  mutt_autocrypt_db_gossip_history_free(&gossip_hist);
  buf_pool_release(&keyid);
 
  return rc;
}

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mutt_autocrypt_set_sign_as_default_key()

int mutt_autocrypt_set_sign_as_default_key

(

struct Email *

e

)

Set the Autocrypt default key for signing.

Parameters

e

Email

Return values

0	Success
-1	Error

Definition at line 717 of file autocrypt.c.

{
  int rc = -1;
  struct AutocryptAccount *account = NULL;
  struct AutocryptModuleData *mod_data = neomutt_get_module_data(NeoMutt, MODULE_ID_AUTOCRYPT);
 
  const bool c_autocrypt = cs_subset_bool(NeoMutt->sub, "autocrypt");
  if (!c_autocrypt || mutt_autocrypt_init(false) || !e)
    return -1;
 
  struct Address *from = TAILQ_FIRST(&e->env->from);
  if (!from || TAILQ_NEXT(from, entries))
    return -1;
 
  if (mutt_autocrypt_db_account_get(from, &account) <= 0)
    goto cleanup;
  if (!account->keyid)
    goto cleanup;
  if (!account->enabled)
    goto cleanup;
 
  mutt_str_replace(&mod_data->autocrypt_sign_as, account->keyid);
  mutt_str_replace(&mod_data->autocrypt_default_key, account->keyid);
 
  rc = 0;
 
cleanup:
  mutt_autocrypt_db_account_free(&account);
  return rc;
}

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mutt_autocrypt_ui_recommendation()

enum AutocryptRec mutt_autocrypt_ui_recommendation	(	const struct Email *	e,
		char **	keylist )

Get the recommended action for an Email.

Parameters

[in]	e	Email
[out]	keylist	List of Autocrypt key ids

Return values

enum	AutocryptRec Recommendation, e.g. AUTOCRYPT_REC_AVAILABLE

If the recommendataion is > NO and keylist is not NULL, keylist will be populated with the autocrypt keyids.

Definition at line 578 of file autocrypt.c.

{
  enum AutocryptRec rc = AUTOCRYPT_REC_OFF;
  struct AutocryptAccount *account = NULL;
  struct AutocryptPeer *peer = NULL;
  struct Address *recip = NULL;
  bool all_encrypt = true, has_discourage = false;
  const char *matching_key = NULL;
  struct AddressList recips = TAILQ_HEAD_INITIALIZER(recips);
  struct Buffer *keylist_buf = NULL;
 
  const bool c_autocrypt = cs_subset_bool(NeoMutt->sub, "autocrypt");
  if (!c_autocrypt || mutt_autocrypt_init(false) || !e)
  {
    if (keylist)
    {
      /* L10N: Error displayed if the user tries to force sending an Autocrypt
         email when the engine is not available.  */
      mutt_message(_("Autocrypt is not available"));
    }
    return AUTOCRYPT_REC_OFF;
  }
 
  struct Address *from = TAILQ_FIRST(&e->env->from);
  if (!from || TAILQ_NEXT(from, entries))
  {
    if (keylist)
      mutt_message(_("Autocrypt is not available"));
    return AUTOCRYPT_REC_OFF;
  }
 
  if (e->security & APPLICATION_SMIME)
  {
    if (keylist)
      mutt_message(_("Autocrypt is not available"));
    return AUTOCRYPT_REC_OFF;
  }
 
  if ((mutt_autocrypt_db_account_get(from, &account) <= 0) || !account->enabled)
  {
    if (keylist)
    {
      /* L10N: Error displayed if the user tries to force sending an Autocrypt
         email when the account does not exist or is not enabled.
         %s is the From email address used to look up the Autocrypt account.
      */
      mutt_message(_("Autocrypt is not enabled for %s"), buf_string(from->mailbox));
    }
    goto cleanup;
  }
 
  keylist_buf = buf_pool_get();
  buf_addstr(keylist_buf, account->keyid);
 
  mutt_addrlist_copy(&recips, &e->env->to, false);
  mutt_addrlist_copy(&recips, &e->env->cc, false);
  mutt_addrlist_copy(&recips, &e->env->bcc, false);
 
  rc = AUTOCRYPT_REC_NO;
  if (TAILQ_EMPTY(&recips))
    goto cleanup;
 
  TAILQ_FOREACH(recip, &recips, entries)
  {
    if (mutt_autocrypt_db_peer_get(recip, &peer) <= 0)
    {
      if (keylist)
      {
        /* L10N: s is an email address.  Autocrypt is scanning for the keyids
           to use to encrypt, but it can't find a valid keyid for this address.
           The message is printed and they are returned to the compose menu.  */
        mutt_message(_("No (valid) autocrypt key found for %s"),
                     buf_string(recip->mailbox));
      }
      goto cleanup;
    }
 
    if (mutt_autocrypt_gpgme_is_valid_key(peer->keyid))
    {
      matching_key = peer->keyid;
 
      if (!(peer->last_seen && peer->autocrypt_timestamp) ||
          (peer->last_seen - peer->autocrypt_timestamp > (35 * 24 * 60 * 60)))
      {
        has_discourage = true;
        all_encrypt = false;
      }
 
      if (!account->prefer_encrypt || !peer->prefer_encrypt)
        all_encrypt = false;
    }
    else if (mutt_autocrypt_gpgme_is_valid_key(peer->gossip_keyid))
    {
      matching_key = peer->gossip_keyid;
 
      has_discourage = true;
      all_encrypt = false;
    }
    else
    {
      if (keylist)
      {
        mutt_message(_("No (valid) autocrypt key found for %s"),
                     buf_string(recip->mailbox));
      }
      goto cleanup;
    }
 
    if (!buf_is_empty(keylist_buf))
      buf_addch(keylist_buf, ' ');
    buf_addstr(keylist_buf, matching_key);
 
    mutt_autocrypt_db_peer_free(&peer);
  }
 
  if (all_encrypt)
    rc = AUTOCRYPT_REC_YES;
  else if (has_discourage)
    rc = AUTOCRYPT_REC_DISCOURAGE;
  else
    rc = AUTOCRYPT_REC_AVAILABLE;
 
  if (keylist)
    mutt_str_replace(keylist, buf_string(keylist_buf));
 
cleanup:
  mutt_autocrypt_db_account_free(&account);
  mutt_addrlist_clear(&recips);
  mutt_autocrypt_db_peer_free(&peer);
  buf_pool_release(&keylist_buf);
  return rc;
}

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mutt_autocrypt_write_autocrypt_header()

int mutt_autocrypt_write_autocrypt_header	(	struct Envelope *	env,
		FILE *	fp )

Write the Autocrypt header to a file.

Parameters

env	Envelope
fp	File to write to

Return values

0	Success
-1	Error

Definition at line 784 of file autocrypt.c.

{
  int rc = -1;
  struct AutocryptAccount *account = NULL;
 
  const bool c_autocrypt = cs_subset_bool(NeoMutt->sub, "autocrypt");
  if (!c_autocrypt || mutt_autocrypt_init(false) || !env)
    return -1;
 
  struct Address *from = TAILQ_FIRST(&env->from);
  if (!from || TAILQ_NEXT(from, entries))
    return -1;
 
  if (mutt_autocrypt_db_account_get(from, &account) <= 0)
    goto cleanup;
  if (!account->keydata)
    goto cleanup;
  if (!account->enabled)
    goto cleanup;
 
  fputs("Autocrypt: ", fp);
  write_autocrypt_header_line(fp, account->email_addr, account->prefer_encrypt,
                              account->keydata);
 
  rc = 0;
 
cleanup:
  mutt_autocrypt_db_account_free(&account);
  return rc;
}

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mutt_autocrypt_write_gossip_headers()

int mutt_autocrypt_write_gossip_headers	(	struct Envelope *	env,
		FILE *	fp )

Write the Autocrypt gossip headers to a file.

Parameters

env	Envelope
fp	File to write to

Return values

0	Success
-1	Error

Definition at line 822 of file autocrypt.c.

{
  const bool c_autocrypt = cs_subset_bool(NeoMutt->sub, "autocrypt");
  if (!c_autocrypt || mutt_autocrypt_init(false) || !env)
    return -1;
 
  for (struct AutocryptHeader *gossip = env->autocrypt_gossip; gossip;
       gossip = gossip->next)
  {
    fputs("Autocrypt-Gossip: ", fp);
    write_autocrypt_header_line(fp, gossip->addr, 0, gossip->keydata);
  }
 
  return 0;
}

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