2001-12-05 23:45:01 +00:00
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/* assuan-client.c - client functions
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* Copyright (C) 2001 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 <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <unistd.h>
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#include <assert.h>
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#include "assuan-defs.h"
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#define xtoi_1(p) (*(p) <= '9'? (*(p)- '0'): \
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*(p) <= 'F'? (*(p)-'A'+10):(*(p)-'a'+10))
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#define xtoi_2(p) ((xtoi_1(p) * 16) + xtoi_1((p)+1))
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2001-12-12 09:17:23 +00:00
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AssuanError
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_assuan_read_from_server (ASSUAN_CONTEXT ctx, int *okay, int *off)
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2001-12-05 23:45:01 +00:00
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{
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char *line;
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int linelen;
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AssuanError rc;
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*okay = 0;
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*off = 0;
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do
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{
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rc = _assuan_read_line (ctx);
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if (rc)
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return rc;
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line = ctx->inbound.line;
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linelen = ctx->inbound.linelen;
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}
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while (*line == '#' || !linelen);
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if (linelen >= 1
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&& line[0] == 'D' && line[1] == ' ')
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{
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*okay = 2; /* data line */
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*off = 2;
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}
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else if (linelen >= 2
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&& line[0] == 'O' && line[1] == 'K'
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&& (line[2] == '\0' || line[2] == ' '))
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{
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*okay = 1;
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*off = 2;
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}
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else if (linelen >= 3
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&& line[0] == 'E' && line[1] == 'R' && line[2] == 'R'
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&& (line[3] == '\0' || line[3] == ' '))
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{
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*okay = 0;
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*off = 3;
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}
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else if (linelen >= 7
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&& line[0] == 'I' && line[1] == 'N' && line[2] == 'Q'
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&& line[3] == 'U' && line[4] == 'I' && line[5] == 'R'
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&& line[6] == 'E'
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&& (line[7] == '\0' || line[7] == ' '))
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{
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*okay = 3;
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*off = 7;
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}
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else
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rc = ASSUAN_Invalid_Response;
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return rc;
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}
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/**
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* assuan_transact:
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* @ctx: The Assuan context
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* @command: Coimmand line to be send to server
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* @data_cb: Callback function for data lines
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* @data_cb_arg: first argument passed to @data_cb
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* @inquire_cb: Callback function for a inquire response
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* @inquire_cb_arg: first argument passed to @inquire_cb
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*
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* FIXME: Write documentation
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*
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* Return value: 0 on success or error code. The error code may be
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* the one one returned by the server in error lines or from the
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* callback functions.
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**/
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AssuanError
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assuan_transact (ASSUAN_CONTEXT ctx,
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const char *command,
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AssuanError (*data_cb)(void *, const void *, size_t),
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void *data_cb_arg,
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AssuanError (*inquire_cb)(void*, const char *),
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void *inquire_cb_arg)
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{
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int rc, okay, off;
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unsigned char *line;
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int linelen;
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2001-12-12 09:17:23 +00:00
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rc = assuan_write_line (ctx, command);
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2001-12-05 23:45:01 +00:00
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if (rc)
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return rc;
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again:
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2001-12-12 09:17:23 +00:00
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rc = _assuan_read_from_server (ctx, &okay, &off);
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2001-12-05 23:45:01 +00:00
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if (rc)
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return rc; /* error reading from server */
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line = ctx->inbound.line + off;
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linelen = ctx->inbound.linelen - off;
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if (!okay)
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{
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rc = atoi (line);
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if (rc < 100)
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rc = ASSUAN_Server_Fault;
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}
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else if (okay == 2)
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{
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if (!data_cb)
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rc = ASSUAN_No_Data_Callback;
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else
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{
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unsigned char *s, *d;
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for (s=d=line; linelen; linelen--)
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{
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if (*s == '%' && linelen > 2)
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{ /* handle escaping */
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s++;
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*d++ = xtoi_2 (s);
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s += 2;
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linelen -= 2;
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}
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else
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*d++ = *s++;
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}
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*d = 0; /* add a hidden string terminator */
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rc = data_cb (data_cb_arg, line, d - line);
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if (!rc)
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goto again;
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}
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}
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else if (okay == 3)
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{
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if (!inquire_cb)
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{
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2001-12-12 09:17:23 +00:00
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assuan_write_line (ctx, "END"); /* get out of inquire mode */
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_assuan_read_from_server (ctx, &okay, &off); /* dummy read */
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2001-12-05 23:45:01 +00:00
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rc = ASSUAN_No_Inquire_Callback;
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}
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else
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{
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rc = inquire_cb (inquire_cb_arg, line);
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if (!rc)
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rc = assuan_send_data (ctx, NULL, 0); /* flush and send END */
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if (!rc)
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goto again;
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}
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}
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return rc;
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}
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