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64e809b791
* g10/keygen.c (ask_user_id): Factor some code out to ... (uid_already_in_keyblock): new. (generate_user_id): Add arg UIDSTR. Fix leaked P. * g10/keyedit.c (menu_adduid): Add new arg uidstring. Adjust caller. (keyedit_quick_adduid): New. * g10/gpg.c (aQuickAddUid): New. (opts): Add command --quick-adduid. (main): Implement that. -- GnuPG-bug-id: 1956 Signed-off-by: Werner Koch <wk@gnupg.org>
550 lines
19 KiB
C
550 lines
19 KiB
C
/* packet.h - OpenPGP packet definitions
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* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
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* 2007 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* GnuPG is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef G10_PACKET_H
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#define G10_PACKET_H
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#include "types.h"
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#include "../common/iobuf.h"
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#include "../common/strlist.h"
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#include "dek.h"
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#include "filter.h"
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#include "../common/openpgpdefs.h"
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#include "../common/userids.h"
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#define DEBUG_PARSE_PACKET 1
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/* Constants to allocate static MPI arrays. */
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#define PUBKEY_MAX_NPKEY 5
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#define PUBKEY_MAX_NSKEY 7
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#define PUBKEY_MAX_NSIG 2
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#define PUBKEY_MAX_NENC 2
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/* Usage flags */
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#define PUBKEY_USAGE_SIG GCRY_PK_USAGE_SIGN /* Good for signatures. */
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#define PUBKEY_USAGE_ENC GCRY_PK_USAGE_ENCR /* Good for encryption. */
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#define PUBKEY_USAGE_CERT GCRY_PK_USAGE_CERT /* Also good to certify keys.*/
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#define PUBKEY_USAGE_AUTH GCRY_PK_USAGE_AUTH /* Good for authentication. */
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#define PUBKEY_USAGE_UNKNOWN GCRY_PK_USAGE_UNKN /* Unknown usage flag. */
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#define PUBKEY_USAGE_NONE 256 /* No usage given. */
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#if (GCRY_PK_USAGE_SIGN | GCRY_PK_USAGE_ENCR | GCRY_PK_USAGE_CERT \
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| GCRY_PK_USAGE_AUTH | GCRY_PK_USAGE_UNKN) >= 256
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# error Please choose another value for PUBKEY_USAGE_NONE
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#endif
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/* Helper macros. */
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#define is_RSA(a) ((a)==PUBKEY_ALGO_RSA || (a)==PUBKEY_ALGO_RSA_E \
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|| (a)==PUBKEY_ALGO_RSA_S )
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#define is_ELGAMAL(a) ((a)==PUBKEY_ALGO_ELGAMAL_E)
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#define is_DSA(a) ((a)==PUBKEY_ALGO_DSA)
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/* A pointer to the packet object. */
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typedef struct packet_struct PACKET;
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/* PKT_GPG_CONTROL types */
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typedef enum {
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CTRLPKT_CLEARSIGN_START = 1,
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CTRLPKT_PIPEMODE = 2,
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CTRLPKT_PLAINTEXT_MARK =3
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} ctrlpkttype_t;
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typedef enum {
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PREFTYPE_NONE = 0,
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PREFTYPE_SYM = 1,
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PREFTYPE_HASH = 2,
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PREFTYPE_ZIP = 3
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} preftype_t;
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typedef struct {
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byte type;
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byte value;
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} prefitem_t;
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typedef struct
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{
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int mode; /* Must be an integer due to the GNU modes 1001 et al. */
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byte hash_algo;
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byte salt[8];
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u32 count;
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} STRING2KEY;
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typedef struct {
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byte version;
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byte cipher_algo; /* cipher algorithm used */
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STRING2KEY s2k;
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byte seskeylen; /* keylength in byte or 0 for no seskey */
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byte seskey[1];
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} PKT_symkey_enc;
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typedef struct {
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u32 keyid[2]; /* 64 bit keyid */
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byte version;
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byte pubkey_algo; /* algorithm used for public key scheme */
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byte throw_keyid;
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gcry_mpi_t data[PUBKEY_MAX_NENC];
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} PKT_pubkey_enc;
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typedef struct {
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u32 keyid[2]; /* 64 bit keyid */
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byte sig_class; /* sig classification */
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byte digest_algo; /* algorithm used for digest */
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byte pubkey_algo; /* algorithm used for public key scheme */
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byte last; /* a stupid flag */
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} PKT_onepass_sig;
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typedef struct {
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size_t size; /* allocated */
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size_t len; /* used */
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byte data[1];
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} subpktarea_t;
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struct revocation_key {
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byte class;
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byte algid;
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byte fpr[MAX_FINGERPRINT_LEN];
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};
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/* Object to keep information about a PKA DNS record. */
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typedef struct
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{
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int valid; /* An actual PKA record exists for EMAIL. */
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int checked; /* Set to true if the FPR has been checked against the
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actual key. */
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char *uri; /* Malloced string with the URI. NULL if the URI is
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not available.*/
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unsigned char fpr[20]; /* The fingerprint as stored in the PKA RR. */
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char email[1];/* The email address from the notation data. */
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} pka_info_t;
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/* Object to keep information pertaining to a signature. */
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typedef struct
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{
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struct
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{
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unsigned checked:1; /* Signature has been checked. */
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unsigned valid:1; /* Signature is good (if checked is set). */
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unsigned chosen_selfsig:1; /* A selfsig that is the chosen one. */
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unsigned unknown_critical:1;
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unsigned exportable:1;
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unsigned revocable:1;
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unsigned policy_url:1; /* At least one policy URL is present */
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unsigned notation:1; /* At least one notation is present */
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unsigned pref_ks:1; /* At least one preferred keyserver is present */
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unsigned expired:1;
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unsigned pka_tried:1; /* Set if we tried to retrieve the PKA record. */
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} flags;
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u32 keyid[2]; /* 64 bit keyid */
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u32 timestamp; /* Signature made (seconds since Epoch). */
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u32 expiredate; /* Expires at this date or 0 if not at all. */
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byte version;
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byte sig_class; /* Sig classification, append for MD calculation. */
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byte pubkey_algo; /* Algorithm used for public key scheme */
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/* (PUBKEY_ALGO_xxx) */
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byte digest_algo; /* Algorithm used for digest (DIGEST_ALGO_xxxx). */
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byte trust_depth;
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byte trust_value;
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const byte *trust_regexp;
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struct revocation_key **revkey;
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int numrevkeys;
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pka_info_t *pka_info; /* Malloced PKA data or NULL if not
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available. See also flags.pka_tried. */
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subpktarea_t *hashed; /* All subpackets with hashed data (v4 only). */
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subpktarea_t *unhashed; /* Ditto for unhashed data. */
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byte digest_start[2]; /* First 2 bytes of the digest. */
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gcry_mpi_t data[PUBKEY_MAX_NSIG];
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} PKT_signature;
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#define ATTRIB_IMAGE 1
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/* This is the cooked form of attributes. */
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struct user_attribute {
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byte type;
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const byte *data;
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u32 len;
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};
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/* (See also keybox-search-desc.h) */
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struct gpg_pkt_user_id_s
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{
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int ref; /* reference counter */
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int len; /* length of the name */
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struct user_attribute *attribs;
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int numattribs;
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byte *attrib_data; /* if this is not NULL, the packet is an attribute */
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unsigned long attrib_len;
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byte *namehash;
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int help_key_usage;
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u32 help_key_expire;
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int help_full_count;
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int help_marginal_count;
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int is_primary; /* 2 if set via the primary flag, 1 if calculated */
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int is_revoked;
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int is_expired;
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u32 expiredate; /* expires at this date or 0 if not at all */
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prefitem_t *prefs; /* list of preferences (may be NULL)*/
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u32 created; /* according to the self-signature */
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byte selfsigversion;
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struct
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{
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/* TODO: Move more flags here */
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unsigned int mdc:1;
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unsigned int ks_modify:1;
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unsigned int compacted:1;
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} flags;
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char name[1];
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};
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typedef struct gpg_pkt_user_id_s PKT_user_id;
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struct revoke_info
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{
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/* revoked at this date */
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u32 date;
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/* the keyid of the revoking key (selfsig or designated revoker) */
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u32 keyid[2];
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/* the algo of the revoking key */
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byte algo;
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};
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/* Information pertaining to secret keys. */
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struct seckey_info
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{
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int is_protected:1; /* The secret info is protected and must */
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/* be decrypted before use, the protected */
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/* MPIs are simply (void*) pointers to memory */
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/* and should never be passed to a mpi_xxx() */
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int sha1chk:1; /* SHA1 is used instead of a 16 bit checksum */
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u16 csum; /* Checksum for old protection modes. */
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byte algo; /* Cipher used to protect the secret information. */
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STRING2KEY s2k; /* S2K parameter. */
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byte ivlen; /* Used length of the IV. */
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byte iv[16]; /* Initialization vector for CFB mode. */
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};
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/****************
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* We assume that secret keys have the same number of parameters as
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* the public key and that the public parameters are the first items
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* in the PKEY array. Thus NPKEY is always less than NSKEY and it is
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* possible to compare the secret and public keys by comparing the
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* first NPKEY elements of the PKEY array. Note that since GnuPG 2.1
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* we don't use secret keys anymore directly because they are managed
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* by gpg-agent. However for parsing OpenPGP key files we need a way
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* to temporary store those secret keys. We do this by putting them
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* into the public key structure and extending the PKEY field to NSKEY
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* elements; the extra secret key information are stored in the
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* SECKEY_INFO field.
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*/
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typedef struct
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{
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u32 timestamp; /* key made */
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u32 expiredate; /* expires at this date or 0 if not at all */
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u32 max_expiredate; /* must not expire past this date */
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struct revoke_info revoked;
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byte hdrbytes; /* number of header bytes */
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byte version;
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byte selfsigversion; /* highest version of all of the self-sigs */
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byte pubkey_algo; /* algorithm used for public key scheme */
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byte pubkey_usage; /* for now only used to pass it to getkey() */
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byte req_usage; /* hack to pass a request to getkey() */
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byte req_algo; /* Ditto */
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u32 has_expired; /* set to the expiration date if expired */
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u32 main_keyid[2]; /* keyid of the primary key */
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u32 keyid[2]; /* calculated by keyid_from_pk() */
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prefitem_t *prefs; /* list of preferences (may be NULL) */
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struct
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{
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unsigned int mdc:1; /* MDC feature set. */
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unsigned int disabled_valid:1;/* The next flag is valid. */
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unsigned int disabled:1; /* The key has been disabled. */
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unsigned int primary:1; /* This is a primary key. */
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unsigned int revoked:2; /* Key has been revoked.
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1 = revoked by the owner
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2 = revoked by designated revoker. */
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unsigned int maybe_revoked:1; /* A designated revocation is
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present, but without the key to
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check it. */
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unsigned int valid:1; /* Key (especially subkey) is valid. */
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unsigned int dont_cache:1; /* Do not cache this key. */
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unsigned int backsig:2; /* 0=none, 1=bad, 2=good. */
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unsigned int serialno_valid:1;/* SERIALNO below is valid. */
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} flags;
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PKT_user_id *user_id; /* If != NULL: found by that uid. */
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struct revocation_key *revkey;
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int numrevkeys;
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u32 trust_timestamp;
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byte trust_depth;
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byte trust_value;
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const byte *trust_regexp;
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char *serialno; /* Malloced hex string or NULL if it is
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likely not on a card. See also
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flags.serialno_valid. */
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struct seckey_info *seckey_info; /* If not NULL this malloced
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structure describes a secret
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key. */
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gcry_mpi_t pkey[PUBKEY_MAX_NSKEY]; /* Right, NSKEY elements. */
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} PKT_public_key;
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/* Evaluates as true if the pk is disabled, and false if it isn't. If
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there is no disable value cached, fill one in. */
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#define pk_is_disabled(a) \
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(((a)->flags.disabled_valid)? \
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((a)->flags.disabled):(cache_disabled_value((a))))
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typedef struct {
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int len; /* length of data */
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char data[1];
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} PKT_comment;
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typedef struct {
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u32 len; /* reserved */
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byte new_ctb;
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byte algorithm;
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iobuf_t buf; /* IOBUF reference */
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} PKT_compressed;
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typedef struct {
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u32 len; /* Remaining length of encrypted data. */
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int extralen; /* This is (blocksize+2). Used by build_packet. */
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byte new_ctb; /* uses a new CTB */
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byte is_partial; /* partial length encoded */
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byte mdc_method; /* > 0: integrity protected encrypted data packet */
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iobuf_t buf; /* IOBUF reference */
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} PKT_encrypted;
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typedef struct {
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byte hash[20];
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} PKT_mdc;
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typedef struct {
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unsigned int trustval;
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unsigned int sigcache;
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} PKT_ring_trust;
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typedef struct {
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u32 len; /* length of encrypted data */
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iobuf_t buf; /* IOBUF reference */
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byte new_ctb;
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byte is_partial; /* partial length encoded */
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int mode;
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u32 timestamp;
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int namelen;
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char name[1];
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} PKT_plaintext;
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typedef struct {
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int control;
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size_t datalen;
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char data[1];
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} PKT_gpg_control;
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/* combine all packets into a union */
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struct packet_struct {
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pkttype_t pkttype;
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union {
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void *generic;
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PKT_symkey_enc *symkey_enc; /* PKT_SYMKEY_ENC */
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PKT_pubkey_enc *pubkey_enc; /* PKT_PUBKEY_ENC */
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PKT_onepass_sig *onepass_sig; /* PKT_ONEPASS_SIG */
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PKT_signature *signature; /* PKT_SIGNATURE */
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PKT_public_key *public_key; /* PKT_PUBLIC_[SUB)KEY */
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PKT_public_key *secret_key; /* PKT_SECRET_[SUB]KEY */
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PKT_comment *comment; /* PKT_COMMENT */
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PKT_user_id *user_id; /* PKT_USER_ID */
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PKT_compressed *compressed; /* PKT_COMPRESSED */
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PKT_encrypted *encrypted; /* PKT_ENCRYPTED[_MDC] */
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PKT_mdc *mdc; /* PKT_MDC */
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PKT_ring_trust *ring_trust; /* PKT_RING_TRUST */
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PKT_plaintext *plaintext; /* PKT_PLAINTEXT */
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PKT_gpg_control *gpg_control; /* PKT_GPG_CONTROL */
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} pkt;
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};
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#define init_packet(a) do { (a)->pkttype = 0; \
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(a)->pkt.generic = NULL; \
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} while(0)
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struct notation
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{
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char *name;
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char *value;
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char *altvalue;
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unsigned char *bdat;
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size_t blen;
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struct
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{
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unsigned int critical:1;
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unsigned int ignore:1;
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} flags;
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struct notation *next;
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};
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/*-- mainproc.c --*/
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void reset_literals_seen(void);
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int proc_packets (ctrl_t ctrl, void *ctx, iobuf_t a );
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int proc_signature_packets (ctrl_t ctrl, void *ctx, iobuf_t a,
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strlist_t signedfiles, const char *sigfile );
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int proc_signature_packets_by_fd (ctrl_t ctrl,
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void *anchor, IOBUF a, int signed_data_fd );
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int proc_encryption_packets (ctrl_t ctrl, void *ctx, iobuf_t a);
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int list_packets( iobuf_t a );
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/*-- parse-packet.c --*/
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int set_packet_list_mode( int mode );
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#if DEBUG_PARSE_PACKET
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int dbg_search_packet( iobuf_t inp, PACKET *pkt, off_t *retpos, int with_uid,
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const char* file, int lineno );
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int dbg_parse_packet( iobuf_t inp, PACKET *ret_pkt,
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const char* file, int lineno );
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int dbg_copy_all_packets( iobuf_t inp, iobuf_t out,
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const char* file, int lineno );
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int dbg_copy_some_packets( iobuf_t inp, iobuf_t out, off_t stopoff,
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const char* file, int lineno );
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int dbg_skip_some_packets( iobuf_t inp, unsigned n,
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const char* file, int lineno );
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#define search_packet( a,b,c,d ) \
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dbg_search_packet( (a), (b), (c), (d), __FILE__, __LINE__ )
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#define parse_packet( a, b ) \
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dbg_parse_packet( (a), (b), __FILE__, __LINE__ )
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#define copy_all_packets( a,b ) \
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dbg_copy_all_packets((a),(b), __FILE__, __LINE__ )
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#define copy_some_packets( a,b,c ) \
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dbg_copy_some_packets((a),(b),(c), __FILE__, __LINE__ )
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#define skip_some_packets( a,b ) \
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dbg_skip_some_packets((a),(b), __FILE__, __LINE__ )
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#else
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int search_packet( iobuf_t inp, PACKET *pkt, off_t *retpos, int with_uid );
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int parse_packet( iobuf_t inp, PACKET *ret_pkt);
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int copy_all_packets( iobuf_t inp, iobuf_t out );
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int copy_some_packets( iobuf_t inp, iobuf_t out, off_t stopoff );
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int skip_some_packets( iobuf_t inp, unsigned n );
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#endif
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int parse_signature( iobuf_t inp, int pkttype, unsigned long pktlen,
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PKT_signature *sig );
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const byte *enum_sig_subpkt ( const subpktarea_t *subpkts,
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sigsubpkttype_t reqtype,
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size_t *ret_n, int *start, int *critical );
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const byte *parse_sig_subpkt ( const subpktarea_t *buffer,
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sigsubpkttype_t reqtype,
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size_t *ret_n );
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const byte *parse_sig_subpkt2 ( PKT_signature *sig,
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sigsubpkttype_t reqtype,
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size_t *ret_n );
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int parse_one_sig_subpkt( const byte *buffer, size_t n, int type );
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void parse_revkeys(PKT_signature *sig);
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int parse_attribute_subpkts(PKT_user_id *uid);
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void make_attribute_uidname(PKT_user_id *uid, size_t max_namelen);
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PACKET *create_gpg_control ( ctrlpkttype_t type,
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const byte *data,
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size_t datalen );
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/*-- build-packet.c --*/
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int build_packet( iobuf_t inp, PACKET *pkt );
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gpg_error_t gpg_mpi_write (iobuf_t out, gcry_mpi_t a);
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gpg_error_t gpg_mpi_write_nohdr (iobuf_t out, gcry_mpi_t a);
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u32 calc_packet_length( PACKET *pkt );
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void build_sig_subpkt( PKT_signature *sig, sigsubpkttype_t type,
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const byte *buffer, size_t buflen );
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void build_sig_subpkt_from_sig( PKT_signature *sig );
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int delete_sig_subpkt(subpktarea_t *buffer, sigsubpkttype_t type );
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void build_attribute_subpkt(PKT_user_id *uid,byte type,
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const void *buf,u32 buflen,
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const void *header,u32 headerlen);
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struct notation *string_to_notation(const char *string,int is_utf8);
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struct notation *sig_to_notation(PKT_signature *sig);
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void free_notation(struct notation *notation);
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/*-- free-packet.c --*/
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void free_symkey_enc( PKT_symkey_enc *enc );
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void free_pubkey_enc( PKT_pubkey_enc *enc );
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void free_seckey_enc( PKT_signature *enc );
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int digest_algo_from_sig( PKT_signature *sig );
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void release_public_key_parts( PKT_public_key *pk );
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void free_public_key( PKT_public_key *key );
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void free_attributes(PKT_user_id *uid);
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void free_user_id( PKT_user_id *uid );
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void free_comment( PKT_comment *rem );
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void free_packet( PACKET *pkt );
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prefitem_t *copy_prefs (const prefitem_t *prefs);
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PKT_public_key *copy_public_key( PKT_public_key *d, PKT_public_key *s );
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PKT_signature *copy_signature( PKT_signature *d, PKT_signature *s );
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PKT_user_id *scopy_user_id (PKT_user_id *sd );
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int cmp_public_keys( PKT_public_key *a, PKT_public_key *b );
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int cmp_signatures( PKT_signature *a, PKT_signature *b );
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int cmp_user_ids( PKT_user_id *a, PKT_user_id *b );
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/*-- sig-check.c --*/
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int signature_check( PKT_signature *sig, gcry_md_hd_t digest );
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int signature_check2( PKT_signature *sig, gcry_md_hd_t digest, u32 *r_expiredate,
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int *r_expired, int *r_revoked, PKT_public_key *ret_pk );
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/*-- pubkey-enc.c --*/
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gpg_error_t get_session_key (PKT_pubkey_enc *k, DEK *dek);
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gpg_error_t get_override_session_key (DEK *dek, const char *string);
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/*-- compress.c --*/
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int handle_compressed (ctrl_t ctrl, void *ctx, PKT_compressed *cd,
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int (*callback)(iobuf_t, void *), void *passthru );
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/*-- encr-data.c --*/
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int decrypt_data (ctrl_t ctrl, void *ctx, PKT_encrypted *ed, DEK *dek );
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/*-- plaintext.c --*/
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int handle_plaintext( PKT_plaintext *pt, md_filter_context_t *mfx,
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int nooutput, int clearsig );
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int ask_for_detached_datafile( gcry_md_hd_t md, gcry_md_hd_t md2,
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const char *inname, int textmode );
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/*-- sign.c --*/
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int make_keysig_packet( PKT_signature **ret_sig, PKT_public_key *pk,
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PKT_user_id *uid, PKT_public_key *subpk,
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PKT_public_key *pksk, int sigclass, int digest_algo,
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|
u32 timestamp, u32 duration,
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int (*mksubpkt)(PKT_signature *, void *),
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void *opaque,
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const char *cache_nonce);
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int update_keysig_packet( PKT_signature **ret_sig,
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|
PKT_signature *orig_sig,
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|
PKT_public_key *pk,
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|
PKT_user_id *uid,
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|
PKT_public_key *subpk,
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|
PKT_public_key *pksk,
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int (*mksubpkt)(PKT_signature *, void *),
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|
void *opaque );
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/*-- keygen.c --*/
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PKT_user_id *generate_user_id (kbnode_t keyblock, const char *uidstr);
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#endif /*G10_PACKET_H*/
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