lib.h

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#ifndef MUTT_NCRYPT_LIB_H
#define MUTT_NCRYPT_LIB_H
 
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
 
struct Address;
struct Body;
#ifdef USE_AUTOCRYPT
struct Buffer;
#endif
struct Email;
struct EmailList;
struct Envelope;
struct Mailbox;
struct Message;
struct State;
 
typedef uint16_t SecurityFlags;           
#define SEC_NO_FLAGS                  0   
#define SEC_ENCRYPT             (1 << 0)  
#define SEC_SIGN                (1 << 1)  
#define SEC_GOODSIGN            (1 << 2)  
#define SEC_BADSIGN             (1 << 3)  
#define SEC_PARTSIGN            (1 << 4)  
#define SEC_SIGNOPAQUE          (1 << 5)  
#define SEC_KEYBLOCK            (1 << 6)  
#define SEC_INLINE              (1 << 7)  
#define SEC_OPPENCRYPT          (1 << 8)  
#define SEC_AUTOCRYPT           (1 << 9)  
#define SEC_AUTOCRYPT_OVERRIDE  (1 << 10) 
 
#define APPLICATION_PGP         (1 << 11) 
#define APPLICATION_SMIME       (1 << 12) 
#define PGP_TRADITIONAL_CHECKED (1 << 13) 
 
#define SEC_ALL_FLAGS          ((1 << 14) - 1)
 
#define PGP_ENCRYPT  (APPLICATION_PGP | SEC_ENCRYPT)
#define PGP_SIGN     (APPLICATION_PGP | SEC_SIGN)
#define PGP_GOODSIGN (APPLICATION_PGP | SEC_GOODSIGN)
#define PGP_KEY      (APPLICATION_PGP | SEC_KEYBLOCK)
#define PGP_INLINE   (APPLICATION_PGP | SEC_INLINE)
 
#define SMIME_ENCRYPT  (APPLICATION_SMIME | SEC_ENCRYPT)
#define SMIME_SIGN     (APPLICATION_SMIME | SEC_SIGN)
#define SMIME_GOODSIGN (APPLICATION_SMIME | SEC_GOODSIGN)
#define SMIME_BADSIGN  (APPLICATION_SMIME | SEC_BADSIGN)
#define SMIME_OPAQUE   (APPLICATION_SMIME | SEC_SIGNOPAQUE)
 
/* WITHCRYPTO actually replaces ifdefs to make the code more readable.
 * Because it is defined as a constant and known at compile time, the
 * compiler can do dead code elimination and thus it behaves
 * effectively as a conditional compile directive. It is set to false
 * if no crypto backend is configured or to a bit vector denoting the
 * configured backends. */
#if (defined(CRYPT_BACKEND_CLASSIC_PGP) && defined(CRYPT_BACKEND_CLASSIC_SMIME)) || \
    defined(CRYPT_BACKEND_GPGME)
#define WithCrypto (APPLICATION_PGP | APPLICATION_SMIME)
#elif defined(CRYPT_BACKEND_CLASSIC_PGP)
#define WithCrypto APPLICATION_PGP
#elif defined(CRYPT_BACKEND_CLASSIC_SMIME)
#define WithCrypto APPLICATION_SMIME
#else
#define WithCrypto 0
#endif
 
typedef uint16_t KeyFlags;                  
#define KEYFLAG_NO_FLAGS                0   
#define KEYFLAG_CANSIGN           (1 << 0)  
#define KEYFLAG_CANENCRYPT        (1 << 1)  
#define KEYFLAG_ISX509            (1 << 2)  
#define KEYFLAG_SECRET            (1 << 7)  
#define KEYFLAG_EXPIRED           (1 << 8)  
#define KEYFLAG_REVOKED           (1 << 9)  
#define KEYFLAG_DISABLED          (1 << 10) 
#define KEYFLAG_SUBKEY            (1 << 11) 
#define KEYFLAG_CRITICAL          (1 << 12) 
#define KEYFLAG_PREFER_ENCRYPTION (1 << 13) 
#define KEYFLAG_PREFER_SIGNING    (1 << 14) 
 
#define KEYFLAG_CANTUSE (KEYFLAG_DISABLED | KEYFLAG_REVOKED | KEYFLAG_EXPIRED)
#define KEYFLAG_RESTRICTIONS (KEYFLAG_CANTUSE | KEYFLAG_CRITICAL)
 
#define KEYFLAG_ABILITIES (KEYFLAG_CANSIGN | KEYFLAG_CANENCRYPT | KEYFLAG_PREFER_ENCRYPTION | KEYFLAG_PREFER_SIGNING)
 
/* crypt.c */
void          crypt_extract_keys_from_messages         (struct Mailbox *m, struct EmailList *el);
void          crypt_forget_passphrase                  (void);
int           crypt_get_keys                           (struct Email *e, char **keylist, bool oppenc_mode);
void          crypt_opportunistic_encrypt              (struct Email *e);
SecurityFlags crypt_query                              (struct Body *b);
bool          crypt_valid_passphrase                   (SecurityFlags flags);
SecurityFlags mutt_is_application_pgp                  (struct Body *b);
SecurityFlags mutt_is_application_smime                (struct Body *b);
SecurityFlags mutt_is_malformed_multipart_pgp_encrypted(struct Body *b);
SecurityFlags mutt_is_multipart_encrypted              (struct Body *b);
SecurityFlags mutt_is_multipart_signed                 (struct Body *b);
int           mutt_is_valid_multipart_pgp_encrypted    (struct Body *b);
int           mutt_protected_headers_handler           (struct Body *b, struct State *state);
int           mutt_protect                             (struct Email *e, char *keylist, bool postpone);
bool          mutt_should_hide_protected_subject       (struct Email *e);
int           mutt_signed_handler                      (struct Body *b, struct State *state);
 
/* cryptglue.c */
void          crypt_cleanup                            (void);
bool          crypt_has_module_backend                 (SecurityFlags type);
void          crypt_init                               (void);
void          crypt_invoke_message                     (SecurityFlags type);
int           crypt_pgp_application_handler            (struct Body *m, struct State *state);
bool          crypt_pgp_check_traditional              (FILE *fp, struct Body *b, bool just_one);
int           crypt_pgp_decrypt_mime                   (FILE *fp_in, FILE **fp_out, struct Body *b, struct Body **cur);
int           crypt_pgp_encrypted_handler              (struct Body *a, struct State *state);
void          crypt_pgp_extract_key_from_attachment    (FILE *fp, struct Body *top);
void          crypt_pgp_invoke_getkeys                 (struct Address *addr);
struct Body * crypt_pgp_make_key_attachment            (void);
SecurityFlags crypt_pgp_send_menu                      (struct Email *e);
int           crypt_smime_application_handler          (struct Body *m, struct State *state);
int           crypt_smime_decrypt_mime                 (FILE *fp_in, FILE **fp_out, struct Body *b, struct Body **cur);
void          crypt_smime_getkeys                      (struct Envelope *env);
SecurityFlags crypt_smime_send_menu                    (struct Email *e);
int           crypt_smime_verify_sender                (struct Email *e, struct Message *msg);
 
/* crypt_mod.c */
void          crypto_module_free                       (void);
 
#ifdef CRYPT_BACKEND_GPGME
/* crypt_gpgme.c */
void          pgp_gpgme_init                           (void);
#ifdef USE_AUTOCRYPT
int          mutt_gpgme_select_secret_key              (struct Buffer *keyid);
#endif
const char  * mutt_gpgme_print_version                 (void);
#endif
 
#endif /* MUTT_NCRYPT_LIB_H */