update.h
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:5k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * update.h: VLC PGP update private API
- *****************************************************************************
- * Copyright © 2007-2008 the VideoLAN team
- *
- * Authors: Rafaël Carré <funman@videolanorg>
- *
- * 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 release 2 of the License, or
- * (at your option) any later release.
- *
- * 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
- *****************************************************************************/
- /* Go reading the rfc 4880 ! NOW !! */
- /*
- * XXX
- * When PGP-signing a file, we only sign a SHA-1 hash of this file
- * The DSA key size requires that we use an algorithm which produce
- * a 160 bits long hash
- * An alternative is RIPEMD160 , which you can use by giving the option
- * --digest-algo RIPEMD160 to GnuPG
- *
- * As soon as SHA-1 is broken, this method is not secure anymore, because an
- * attacker could generate a file with the same SHA-1 hash.
- *
- * Whenever this happens, we need to use another algorithm / type of key.
- * XXX
- */
- enum /* Public key algorithms */
- {
- /* we will only use DSA public keys */
- PUBLIC_KEY_ALGO_DSA = 0x11
- };
- enum /* Digest algorithms */
- {
- /* and DSA use SHA-1 digest */
- DIGEST_ALGO_SHA1 = 0x02
- };
- enum /* Packet types */
- {
- SIGNATURE_PACKET = 0x02,
- PUBLIC_KEY_PACKET = 0x06,
- USER_ID_PACKET = 0x0d
- };
- enum /* Signature types */
- {
- BINARY_SIGNATURE = 0x00,
- TEXT_SIGNATURE = 0x01,
- /* Public keys signatures */
- GENERIC_KEY_SIGNATURE = 0x10, /* No assumption of verification */
- PERSONA_KEY_SIGNATURE = 0x11, /* No verification has been made */
- CASUAL_KEY_SIGNATURE = 0x12, /* Some casual verification */
- POSITIVE_KEY_SIGNATURE = 0x13 /* Substantial verification */
- };
- enum /* Signature subpacket types */
- {
- ISSUER_SUBPACKET = 0x10
- };
- struct public_key_packet_t
- { /* a public key packet (DSA/SHA-1) is 418 bytes */
- uint8_t version; /* we use only version 4 */
- uint8_t timestamp[4]; /* creation time of the key */
- uint8_t algo; /* we only use DSA */
- /* the multi precision integers, with their 2 bytes length header */
- uint8_t p[2+128];
- uint8_t q[2+20];
- uint8_t g[2+128];
- uint8_t y[2+128];
- };
- /* used for public key and file signatures */
- struct signature_packet_t
- {
- uint8_t version; /* 3 or 4 */
- uint8_t type;
- uint8_t public_key_algo; /* DSA only */
- uint8_t digest_algo; /* SHA-1 only */
- uint8_t hash_verification[2];
- uint8_t issuer_longid[8];
- union /* version specific data */
- {
- struct
- {
- uint8_t hashed_data_len[2]; /* scalar number */
- uint8_t *hashed_data; /* hashed_data_len bytes */
- uint8_t unhashed_data_len[2]; /* scalar number */
- uint8_t *unhashed_data; /* unhashed_data_len bytes */
- } v4;
- struct
- {
- uint8_t hashed_data_len; /* MUST be 5 */
- uint8_t timestamp[4]; /* 4 bytes scalar number */
- } v3;
- } specific;
- /* The part below is made of consecutive MPIs, their number and size being
- * public-key-algorithm dependent.
- *
- * Since we use DSA signatures only, there is 2 integers, r & s, made of:
- * 2 bytes for the integer length (scalar number)
- * 160 bits (20 bytes) for the integer itself
- *
- * Note: the integers may be less than 160 significant bits
- */
- uint8_t r[2+20];
- uint8_t s[2+20];
- };
- typedef struct public_key_packet_t public_key_packet_t;
- typedef struct signature_packet_t signature_packet_t;
- struct public_key_t
- {
- uint8_t longid[8]; /* Long id */
- uint8_t *psz_username; /* USER ID */
- public_key_packet_t key; /* Public key packet */
- signature_packet_t sig; /* Signature packet, by the embedded key */
- };
- typedef struct public_key_t public_key_t;
- /**
- * Non blocking binary download
- */
- typedef struct
- {
- VLC_COMMON_MEMBERS
- update_t *p_update;
- char *psz_destdir;
- } update_download_thread_t;
- /**
- * Non blocking update availability verification
- */
- typedef struct
- {
- VLC_COMMON_MEMBERS
- update_t *p_update;
- void (*pf_callback)( void *, bool );
- void *p_data;
- } update_check_thread_t;
- /**
- * The update object. Stores (and caches) all information relative to updates
- */
- struct update_t
- {
- libvlc_int_t *p_libvlc;
- vlc_mutex_t lock;
- struct update_release_t release; ///< Release (version)
- public_key_t *p_pkey;
- update_download_thread_t *p_download;
- update_check_thread_t *p_check;
- };