cryptglue.c

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#include "config.h"
#include <stdbool.h>
#include <stdio.h>
#include "mutt/lib.h"
#include "core/lib.h"
#include "cryptglue.h"
#include "lib.h"
#include "crypt_mod.h"
#ifndef CRYPT_BACKEND_GPGME
#include "gui/lib.h"
#endif
#if defined(CRYPT_BACKEND_GPGME) || defined(USE_AUTOCRYPT)
#include "config/lib.h"
#endif
#ifdef USE_AUTOCRYPT
#include "email/lib.h"
#include "autocrypt/lib.h"
#include "crypt_gpgme.h"
#include "options.h"
#else
struct Envelope;
#endif

struct Address;
struct AddressList;

#ifdef CRYPT_BACKEND_CLASSIC_PGP
extern struct CryptModuleSpecs CryptModPgpClassic;
#endif

#ifdef CRYPT_BACKEND_CLASSIC_SMIME
extern struct CryptModuleSpecs CryptModSmimeClassic;
#endif

#ifdef CRYPT_BACKEND_GPGME
extern struct CryptModuleSpecs CryptModPgpGpgme;
extern struct CryptModuleSpecs CryptModSmimeGpgme;
#endif

/* If the crypto module identifier by IDENTIFIER has been registered,
 * call its function FUNC.  Do nothing else.  This may be used as an
 * expression. */
#define CRYPT_MOD_CALL_CHECK(identifier, func)                                 \
  (crypto_module_lookup(APPLICATION_##identifier) &&                           \
   (crypto_module_lookup(APPLICATION_##identifier))->func)

/* Call the function FUNC in the crypto module identified by
 * IDENTIFIER. This may be used as an expression. */
#define CRYPT_MOD_CALL(identifier, func)                                       \
  (*(crypto_module_lookup(APPLICATION_##identifier))->func)

void crypt_init(void)
{
#ifdef CRYPT_BACKEND_GPGME
  const bool c_crypt_use_gpgme =
      cs_subset_bool(NeoMutt->sub, "crypt_use_gpgme");
#endif
#ifdef CRYPT_BACKEND_CLASSIC_PGP
  if (
#ifdef CRYPT_BACKEND_GPGME
      (!c_crypt_use_gpgme)
#else
      1
#endif
  )
    crypto_module_register(&CryptModPgpClassic);
#endif

#ifdef CRYPT_BACKEND_CLASSIC_SMIME
  if (
#ifdef CRYPT_BACKEND_GPGME
      (!c_crypt_use_gpgme)
#else
      1
#endif
  )
    crypto_module_register(&CryptModSmimeClassic);
#endif

#ifdef CRYPT_BACKEND_GPGME
  if (c_crypt_use_gpgme)
  {
    crypto_module_register(&CryptModPgpGpgme);
    crypto_module_register(&CryptModSmimeGpgme);
  }
#endif

#if defined(CRYPT_BACKEND_CLASSIC_PGP) ||                                      \
    defined(CRYPT_BACKEND_CLASSIC_SMIME) || defined(CRYPT_BACKEND_GPGME)
  if (CRYPT_MOD_CALL_CHECK(PGP, init))
    CRYPT_MOD_CALL(PGP, init)();

  if (CRYPT_MOD_CALL_CHECK(SMIME, init))
    CRYPT_MOD_CALL(SMIME, init)();
#endif
}

void crypt_cleanup(void)
{
  if (CRYPT_MOD_CALL_CHECK(PGP, cleanup))
    (CRYPT_MOD_CALL(PGP, cleanup))();

  if (CRYPT_MOD_CALL_CHECK(SMIME, cleanup))
    (CRYPT_MOD_CALL(SMIME, cleanup))();
}

void crypt_invoke_message(SecurityFlags type)
{
  if (((WithCrypto & APPLICATION_PGP) != 0) && (type & APPLICATION_PGP))
    mutt_message(_("Invoking PGP..."));
  else if (((WithCrypto & APPLICATION_SMIME) != 0) && (type & APPLICATION_SMIME))
    mutt_message(_("Invoking S/MIME..."));
}

bool crypt_has_module_backend(SecurityFlags type)
{
  if (((WithCrypto & APPLICATION_PGP) != 0) && (type & APPLICATION_PGP) &&
      crypto_module_lookup(APPLICATION_PGP))
  {
    return true;
  }

  if (((WithCrypto & APPLICATION_SMIME) != 0) && (type & APPLICATION_SMIME) &&
      crypto_module_lookup(APPLICATION_SMIME))
  {
    return true;
  }

  return false;
}

void crypt_pgp_void_passphrase(void)
{
  if (CRYPT_MOD_CALL_CHECK(PGP, void_passphrase))
    CRYPT_MOD_CALL(PGP, void_passphrase)();
}

bool crypt_pgp_valid_passphrase(void)
{
  if (CRYPT_MOD_CALL_CHECK(PGP, valid_passphrase))
    return CRYPT_MOD_CALL(PGP, valid_passphrase)();

  return false;
}

int crypt_pgp_decrypt_mime(FILE *fp_in, FILE **fp_out, struct Body *b, struct Body **cur)
{
#ifdef USE_AUTOCRYPT
  const bool c_autocrypt = cs_subset_bool(NeoMutt->sub, "autocrypt");
  if (c_autocrypt)
  {
    OptAutocryptGpgme = true;
    int result = pgp_gpgme_decrypt_mime(fp_in, fp_out, b, cur);
    OptAutocryptGpgme = false;
    if (result == 0)
    {
      b->is_autocrypt = true;
      return result;
    }
  }
#endif

  if (CRYPT_MOD_CALL_CHECK(PGP, decrypt_mime))
    return CRYPT_MOD_CALL(PGP, decrypt_mime)(fp_in, fp_out, b, cur);

  return -1;
}

int crypt_pgp_application_handler(struct Body *b, struct State *s)
{
  if (CRYPT_MOD_CALL_CHECK(PGP, application_handler))
    return CRYPT_MOD_CALL(PGP, application_handler)(b, s);

  return -1;
}

int crypt_pgp_encrypted_handler(struct Body *b, struct State *s)
{
#ifdef USE_AUTOCRYPT
  const bool c_autocrypt = cs_subset_bool(NeoMutt->sub, "autocrypt");
  if (c_autocrypt)
  {
    OptAutocryptGpgme = true;
    int result = pgp_gpgme_encrypted_handler(b, s);
    OptAutocryptGpgme = false;
    if (result == 0)
    {
      b->is_autocrypt = true;
      return result;
    }
  }
#endif

  if (CRYPT_MOD_CALL_CHECK(PGP, encrypted_handler))
    return CRYPT_MOD_CALL(PGP, encrypted_handler)(b, s);

  return -1;
}

void crypt_pgp_invoke_getkeys(struct Address *addr)
{
  if (CRYPT_MOD_CALL_CHECK(PGP, pgp_invoke_getkeys))
    CRYPT_MOD_CALL(PGP, pgp_invoke_getkeys)(addr);
}

bool crypt_pgp_check_traditional(FILE *fp, struct Body *b, bool just_one)
{
  if (CRYPT_MOD_CALL_CHECK(PGP, pgp_check_traditional))
    return CRYPT_MOD_CALL(PGP, pgp_check_traditional)(fp, b, just_one);

  return false;
}

struct Body *crypt_pgp_traditional_encryptsign(struct Body *a, SecurityFlags flags, char *keylist)
{
  if (CRYPT_MOD_CALL_CHECK(PGP, pgp_traditional_encryptsign))
    return CRYPT_MOD_CALL(PGP, pgp_traditional_encryptsign)(a, flags, keylist);

  return NULL;
}

struct Body *crypt_pgp_make_key_attachment(void)
{
  if (CRYPT_MOD_CALL_CHECK(PGP, pgp_make_key_attachment))
    return CRYPT_MOD_CALL(PGP, pgp_make_key_attachment)();

  return NULL;
}

char *crypt_pgp_find_keys(struct AddressList *addrlist, bool oppenc_mode)
{
  if (CRYPT_MOD_CALL_CHECK(PGP, find_keys))
    return CRYPT_MOD_CALL(PGP, find_keys)(addrlist, oppenc_mode);

  return NULL;
}

struct Body *crypt_pgp_sign_message(struct Body *a, const struct AddressList *from)
{
  if (CRYPT_MOD_CALL_CHECK(PGP, sign_message))
    return CRYPT_MOD_CALL(PGP, sign_message)(a, from);

  return NULL;
}

struct Body *crypt_pgp_encrypt_message(struct Mailbox *m, struct Email *e,
                                       struct Body *a, char *keylist, int sign,
                                       const struct AddressList *from)
{
#ifdef USE_AUTOCRYPT
  if (e->security & SEC_AUTOCRYPT)
  {
    if (mutt_autocrypt_set_sign_as_default_key(m, e))
      return NULL;

    OptAutocryptGpgme = true;
    struct Body *result = pgp_gpgme_encrypt_message(a, keylist, sign, from);
    OptAutocryptGpgme = false;

    return result;
  }
#endif

  if (CRYPT_MOD_CALL_CHECK(PGP, pgp_encrypt_message))
    return CRYPT_MOD_CALL(PGP, pgp_encrypt_message)(a, keylist, sign, from);

  return NULL;
}

void crypt_pgp_invoke_import(const char *fname)
{
  if (CRYPT_MOD_CALL_CHECK(PGP, pgp_invoke_import))
    CRYPT_MOD_CALL(PGP, pgp_invoke_import)(fname);
}

int crypt_pgp_verify_one(struct Body *sigbdy, struct State *s, const char *tempf)
{
  if (CRYPT_MOD_CALL_CHECK(PGP, verify_one))
    return CRYPT_MOD_CALL(PGP, verify_one)(sigbdy, s, tempf);

  return -1;
}

SecurityFlags crypt_pgp_send_menu(struct Mailbox *m, struct Email *e)
{
  if (CRYPT_MOD_CALL_CHECK(PGP, send_menu))
    return CRYPT_MOD_CALL(PGP, send_menu)(m, e);

  return 0;
}

void crypt_pgp_extract_key_from_attachment(FILE *fp, struct Body *top)
{
  if (CRYPT_MOD_CALL_CHECK(PGP, pgp_extract_key_from_attachment))
    CRYPT_MOD_CALL(PGP, pgp_extract_key_from_attachment)(fp, top);
}

void crypt_pgp_set_sender(const char *sender)
{
  if (CRYPT_MOD_CALL_CHECK(PGP, set_sender))
    CRYPT_MOD_CALL(PGP, set_sender)(sender);
}

void crypt_smime_void_passphrase(void)
{
  if (CRYPT_MOD_CALL_CHECK(SMIME, void_passphrase))
    CRYPT_MOD_CALL(SMIME, void_passphrase)();
}

bool crypt_smime_valid_passphrase(void)
{
  if (CRYPT_MOD_CALL_CHECK(SMIME, valid_passphrase))
    return CRYPT_MOD_CALL(SMIME, valid_passphrase)();

  return false;
}

int crypt_smime_decrypt_mime(FILE *fp_in, FILE **fp_out, struct Body *b, struct Body **cur)
{
  if (CRYPT_MOD_CALL_CHECK(SMIME, decrypt_mime))
    return CRYPT_MOD_CALL(SMIME, decrypt_mime)(fp_in, fp_out, b, cur);

  return -1;
}

int crypt_smime_application_handler(struct Body *b, struct State *s)
{
  if (CRYPT_MOD_CALL_CHECK(SMIME, application_handler))
    return CRYPT_MOD_CALL(SMIME, application_handler)(b, s);

  return -1;
}

void crypt_smime_getkeys(struct Envelope *env)
{
  if (CRYPT_MOD_CALL_CHECK(SMIME, smime_getkeys))
    CRYPT_MOD_CALL(SMIME, smime_getkeys)(env);
}

int crypt_smime_verify_sender(struct Mailbox *m, struct Email *e, struct Message *msg)
{
  if (CRYPT_MOD_CALL_CHECK(SMIME, smime_verify_sender))
    return CRYPT_MOD_CALL(SMIME, smime_verify_sender)(m, e, msg);

  return 1;
}

char *crypt_smime_find_keys(struct AddressList *addrlist, bool oppenc_mode)
{
  if (CRYPT_MOD_CALL_CHECK(SMIME, find_keys))
    return CRYPT_MOD_CALL(SMIME, find_keys)(addrlist, oppenc_mode);

  return NULL;
}

struct Body *crypt_smime_sign_message(struct Body *a, const struct AddressList *from)
{
  if (CRYPT_MOD_CALL_CHECK(SMIME, sign_message))
    return CRYPT_MOD_CALL(SMIME, sign_message)(a, from);

  return NULL;
}

struct Body *crypt_smime_build_smime_entity(struct Body *a, char *certlist)
{
  if (CRYPT_MOD_CALL_CHECK(SMIME, smime_build_smime_entity))
    return CRYPT_MOD_CALL(SMIME, smime_build_smime_entity)(a, certlist);

  return NULL;
}

void crypt_smime_invoke_import(const char *infile, const char *mailbox)
{
  if (CRYPT_MOD_CALL_CHECK(SMIME, smime_invoke_import))
    CRYPT_MOD_CALL(SMIME, smime_invoke_import)(infile, mailbox);
}

int crypt_smime_verify_one(struct Body *sigbdy, struct State *s, const char *tempf)
{
  if (CRYPT_MOD_CALL_CHECK(SMIME, verify_one))
    return CRYPT_MOD_CALL(SMIME, verify_one)(sigbdy, s, tempf);

  return -1;
}

SecurityFlags crypt_smime_send_menu(struct Mailbox *m, struct Email *e)
{
  if (CRYPT_MOD_CALL_CHECK(SMIME, send_menu))
    return CRYPT_MOD_CALL(SMIME, send_menu)(m, e);

  return 0;
}

void crypt_smime_set_sender(const char *sender)
{
  if (CRYPT_MOD_CALL_CHECK(SMIME, set_sender))
    CRYPT_MOD_CALL(SMIME, set_sender)(sender);
}