mirror of
git://git.gnupg.org/gnupg.git
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399 lines
10 KiB
C
399 lines
10 KiB
C
/* status.c
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* Copyright (C) 1998 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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#ifdef USE_SHM_COPROCESSING
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#ifdef USE_CAPABILITIES
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#include <sys/capability.h>
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#endif
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#ifdef HAVE_SYS_IPC_H
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#include <sys/ipc.h>
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#endif
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#ifdef HAVE_SYS_SHM_H
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#include <sys/shm.h>
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#endif
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#if defined(HAVE_MLOCK)
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#include <sys/mman.h>
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#endif
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#endif
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#include "util.h"
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#include "status.h"
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#include "ttyio.h"
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#include "options.h"
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#include "main.h"
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#include <gcrypt.h>
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#include "i18n.h"
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static int fd = -1;
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#ifdef USE_SHM_COPROCESSING
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static int shm_id = -1;
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static volatile char *shm_area;
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static size_t shm_size;
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static int shm_is_locked;
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#endif /*USE_SHM_COPROCESSING*/
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void
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set_status_fd ( int newfd )
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{
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fd = newfd;
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}
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int
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is_status_enabled()
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{
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return fd != -1;
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}
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void
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write_status ( int no )
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{
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write_status_text( no, NULL );
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}
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void
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write_status_text ( int no, const char *text)
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{
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const char *s;
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if( fd == -1 )
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return; /* not enabled */
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switch( no ) {
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case STATUS_ENTER : s = "ENTER\n"; break;
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case STATUS_LEAVE : s = "LEAVE\n"; break;
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case STATUS_ABORT : s = "ABORT\n"; break;
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case STATUS_GOODSIG: s = "GOODSIG\n"; break;
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case STATUS_SIGEXPIRED: s = "SIGEXPIRED\n"; break;
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case STATUS_KEYREVOKED: s = "KEYREVOKED\n"; break;
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case STATUS_BADSIG : s = "BADSIG\n"; break;
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case STATUS_ERRSIG : s = "ERRSIG\n"; break;
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case STATUS_BADARMOR : s = "BADARMOR\n"; break;
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case STATUS_RSA_OR_IDEA : s= "RSA_OR_IDEA\n"; break;
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case STATUS_TRUST_UNDEFINED: s = "TRUST_UNDEFINED\n"; break;
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case STATUS_TRUST_NEVER : s = "TRUST_NEVER\n"; break;
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case STATUS_TRUST_MARGINAL : s = "TRUST_MARGINAL\n"; break;
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case STATUS_TRUST_FULLY : s = "TRUST_FULLY\n"; break;
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case STATUS_TRUST_ULTIMATE : s = "TRUST_ULTIMATE\n"; break;
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case STATUS_SHM_INFO : s = "SHM_INFO\n"; break;
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case STATUS_SHM_GET : s = "SHM_GET\n"; break;
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case STATUS_SHM_GET_BOOL : s = "SHM_GET_BOOL\n"; break;
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case STATUS_SHM_GET_HIDDEN : s = "SHM_GET_HIDDEN\n"; break;
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case STATUS_NEED_PASSPHRASE: s = "NEED_PASSPHRASE\n"; break;
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case STATUS_VALIDSIG : s = "VALIDSIG\n"; break;
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case STATUS_SIG_ID : s = "SIG_ID\n"; break;
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case STATUS_ENC_TO : s = "ENC_TO\n"; break;
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case STATUS_NODATA : s = "NODATA\n"; break;
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case STATUS_BAD_PASSPHRASE : s = "BAD_PASSPHRASE\n"; break;
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case STATUS_NO_PUBKEY : s = "NO_PUBKEY\n"; break;
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case STATUS_NO_SECKEY : s = "NO_SECKEY\n"; break;
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case STATUS_NEED_PASSPHRASE_SYM: s = "NEED_PASSPHRASE_SYM\n"; break;
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case STATUS_DECRYPTION_FAILED: s = "DECRYPTION_FAILED\n"; break;
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case STATUS_DECRYPTION_OKAY: s = "DECRYPTION_OKAY\n"; break;
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case STATUS_MISSING_PASSPHRASE: s = "MISSING_PASSPHRASE\n"; break;
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case STATUS_GOOD_PASSPHRASE : s = "GOOD_PASSPHRASE\n"; break;
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case STATUS_GOODMDC : s = "GOODMDC\n"; break;
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case STATUS_BADMDC : s = "BADMDC\n"; break;
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case STATUS_ERRMDC : s = "ERRMDC\n"; break;
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case STATUS_IMPORTED : s = "IMPORTED\n"; break;
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case STATUS_IMPORT_RES : s = "IMPORT_RES\n"; break;
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default: s = "?\n"; break;
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}
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write( fd, "[GNUPG:] ", 9 );
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if( text ) {
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write( fd, s, strlen(s)-1 );
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write( fd, " ", 1 );
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write( fd, text, strlen(text) );
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write( fd, "\n", 1 );
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}
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else
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write( fd, s, strlen(s) );
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}
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#ifdef USE_SHM_COPROCESSING
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#ifndef IPC_RMID_DEFERRED_RELEASE
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static void
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remove_shmid( void )
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{
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if( shm_id != -1 ) {
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shmctl ( shm_id, IPC_RMID, 0);
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shm_id = -1;
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}
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}
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#endif
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void
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init_shm_coprocessing ( ulong requested_shm_size, int lock_mem )
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{
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char buf[100];
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struct shmid_ds shmds;
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#ifndef IPC_RMID_DEFERRED_RELEASE
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atexit( remove_shmid );
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#endif
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requested_shm_size = (requested_shm_size + 4095) & ~4095;
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if ( requested_shm_size > 2 * 4096 )
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log_fatal("too much shared memory requested; only 8k are allowed\n");
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shm_size = 4096 /* one page for us */ + requested_shm_size;
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shm_id = shmget( IPC_PRIVATE, shm_size, IPC_CREAT | 0700 );
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if ( shm_id == -1 )
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log_fatal("can't get %uk of shared memory: %s\n",
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(unsigned)shm_size/1024, strerror(errno));
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shm_area = shmat( shm_id, 0, 0 );
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if ( shm_area == (char*)-1 )
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log_fatal("can't attach %uk shared memory: %s\n",
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(unsigned)shm_size/1024, strerror(errno));
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log_debug("mapped %uk shared memory at %p, id=%d\n",
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(unsigned)shm_size/1024, shm_area, shm_id );
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if( lock_mem ) {
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#ifdef USE_CAPABILITIES
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cap_set_proc( cap_from_text("cap_ipc_lock+ep") );
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#endif
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#ifdef IPC_HAVE_SHM_LOCK
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if ( shmctl (shm_id, SHM_LOCK, 0) )
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log_info("locking shared memory %d failed: %s\n",
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shm_id, strerror(errno));
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else
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shm_is_locked = 1;
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#elif defined(HAVE_MLOCK) && !defined(HAVE_BROKEN_MLOCK)
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/* (need the cast for Solaris with Sun's workshop compilers) */
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if ( mlock ( (char*)shm_area, shm_size) )
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log_info("locking shared memory %d failed: %s\n",
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shm_id, strerror(errno));
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else
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shm_is_locked = 1;
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#else
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log_info("Locking shared memory %d failed: No way to do it\n", shm_id );
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#endif
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#ifdef USE_CAPABILITIES
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cap_set_proc( cap_from_text("cap_ipc_lock+p") );
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#endif
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}
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#ifdef IPC_RMID_DEFERRED_RELEASE
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if( shmctl( shm_id, IPC_RMID, 0) )
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log_fatal("shmctl IPC_RMDID of %d failed: %s\n",
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shm_id, strerror(errno));
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#endif
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if( shmctl( shm_id, IPC_STAT, &shmds ) )
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log_fatal("shmctl IPC_STAT of %d failed: %s\n",
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shm_id, strerror(errno));
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if( shmds.shm_perm.uid != getuid() ) {
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shmds.shm_perm.uid = getuid();
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if( shmctl( shm_id, IPC_SET, &shmds ) )
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log_fatal("shmctl IPC_SET of %d failed: %s\n",
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shm_id, strerror(errno));
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}
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/* write info; Protocol version, id, size, locked size */
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sprintf( buf, "pv=1 pid=%d shmid=%d sz=%u lz=%u", (int)getpid(),
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shm_id, (unsigned)shm_size, shm_is_locked? (unsigned)shm_size:0 );
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write_status_text( STATUS_SHM_INFO, buf );
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}
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/****************
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* Request a string from client
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* If bool, returns static string on true (do not free) or NULL for false
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*/
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static char *
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do_shm_get( const char *keyword, int hidden, int bool )
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{
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size_t n;
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byte *p;
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char *string;
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if( !shm_area )
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BUG();
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shm_area[0] = 0; /* msb of length of control block */
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shm_area[1] = 32; /* and lsb */
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shm_area[2] = 1; /* indicate that we are waiting on a reply */
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shm_area[3] = 0; /* clear data available flag */
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write_status_text( bool? STATUS_SHM_GET_BOOL :
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hidden? STATUS_SHM_GET_HIDDEN : STATUS_SHM_GET, keyword );
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do {
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pause_on_sigusr(1);
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if( shm_area[0] || shm_area[1] != 32 || shm_area[2] != 1 )
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log_fatal("client modified shm control block - abort\n");
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} while( !shm_area[3] );
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shm_area[2] = 0; /* reset request flag */
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p = (byte*)shm_area+32;
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n = p[0] << 8 | p[1];
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p += 2;
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if( n+32+2+1 > 4095 )
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log_fatal("client returns too large data (%u bytes)\n", (unsigned)n );
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if( bool )
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return p[0]? "" : NULL;
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string = hidden? gcry_xmalloc_secure( n+1 ) : gcry_xmalloc( n+1 );
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memcpy(string, p, n );
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string[n] = 0; /* make sure it is a string */
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if( hidden ) /* invalidate the memory */
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memset( p, 0, n );
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return string;
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}
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#endif /* USE_SHM_COPROCESSING */
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int
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cpr_enabled()
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{
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#ifdef USE_SHM_COPROCESSING
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if( opt.shm_coprocess )
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return 1;
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#endif
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return 0;
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}
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char *
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cpr_get( const char *keyword, const char *prompt )
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{
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char *p;
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#ifdef USE_SHM_COPROCESSING
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if( opt.shm_coprocess )
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return do_shm_get( keyword, 0, 0 );
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#endif
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for(;;) {
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p = tty_get( prompt );
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if( *p=='?' && !p[1] && !(keyword && !*keyword)) {
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gcry_free(p);
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display_online_help( keyword );
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}
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else
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return p;
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}
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}
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char *
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cpr_get_utf8( const char *keyword, const char *prompt )
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{
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char *p;
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p = cpr_get( keyword, prompt );
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if( p ) {
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char *utf8 = native_to_utf8( p );
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gcry_free( p );
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p = utf8;
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}
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return p;
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}
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char *
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cpr_get_hidden( const char *keyword, const char *prompt )
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{
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char *p;
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#ifdef USE_SHM_COPROCESSING
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if( opt.shm_coprocess )
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return do_shm_get( keyword, 1, 0 );
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#endif
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for(;;) {
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p = tty_get_hidden( prompt );
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if( *p == '?' && !p[1] ) {
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gcry_free(p);
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display_online_help( keyword );
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}
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else
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return p;
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}
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}
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void
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cpr_kill_prompt(void)
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{
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#ifdef USE_SHM_COPROCESSING
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if( opt.shm_coprocess )
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return;
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#endif
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tty_kill_prompt();
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return;
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}
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int
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cpr_get_answer_is_yes( const char *keyword, const char *prompt )
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{
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int yes;
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char *p;
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#ifdef USE_SHM_COPROCESSING
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if( opt.shm_coprocess )
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return !!do_shm_get( keyword, 0, 1 );
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#endif
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for(;;) {
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p = tty_get( prompt );
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trim_spaces(p); /* it is okay to do this here */
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if( *p == '?' && !p[1] ) {
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gcry_free(p);
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display_online_help( keyword );
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}
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else {
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tty_kill_prompt();
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yes = answer_is_yes(p);
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gcry_free(p);
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return yes;
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}
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}
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}
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int
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cpr_get_answer_yes_no_quit( const char *keyword, const char *prompt )
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{
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int yes;
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char *p;
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#ifdef USE_SHM_COPROCESSING
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if( opt.shm_coprocess )
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return !!do_shm_get( keyword, 0, 1 );
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#endif
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for(;;) {
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p = tty_get( prompt );
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trim_spaces(p); /* it is okay to do this here */
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if( *p == '?' && !p[1] ) {
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gcry_free(p);
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display_online_help( keyword );
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}
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else {
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tty_kill_prompt();
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yes = answer_is_yes_no_quit(p);
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gcry_free(p);
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return yes;
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}
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}
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}
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