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/**
* Utilities for the quality of service module mod_qos.
*
* See http://mod-qos.sourceforge.net/ for further
* details.
*
* Copyright (C) 2023 Pascal Buchbinder
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
static const char revision[] = "$Id: qs_apo.c 2654 2022-05-13 09:12:42Z pbuchbinder $";
#include <stdio.h>
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdarg.h>
#include <fcntl.h>
#include <dirent.h>
#include <unistd.h>
#include <errno.h>
#include <pwd.h>
/* apr/apr-util */
#include <apr.h>
#include <apr_base64.h>
#include <apr_pools.h>
#include <apr_strings.h>
#include <apr_thread_proc.h>
#include <apr_file_io.h>
#include <apr_time.h>
#include "qs_util.h"
#include "qs_apo.h"
static apr_table_t *qs_args(apr_pool_t *pool, const char *line) {
char *last = apr_pstrdup(pool, line);
apr_table_t* table = apr_table_make(pool, 10);
char *val;
while((val = apr_strtok(NULL, " ", &last))) {
apr_table_addn(table, val, "");
}
return table;
}
static void qs_failedexec(const char *msg, const char *cmd, apr_status_t status) {
char buf[MAX_LINE];
apr_strerror(status, buf, sizeof(buf));
fprintf(stderr, "ERROR %s '%s': '%s'\n", msg, cmd, buf);
exit(1);
}
/**
* Reads a passphrase using the defined passphrase getter (executes
* the program and reads the passphras from stdout).
*
* @param pool To allocate memory
* @param prg Path of the program to exectue
* @return The passphrase
*/
char *qs_readpwd(apr_pool_t *pool, const char *prg) {
apr_status_t status;
apr_proc_t proc;
const char **args;
apr_table_entry_t *entry;
char *last;
char *copy = apr_pstrdup(pool, prg);
char *cmd = apr_strtok(copy, " ", &last);
apr_table_t *a = qs_args(pool, prg);
int i;
apr_procattr_t *attr;
apr_size_t len = MAX_LINE;
char *buf = apr_pcalloc(pool, len);
args = apr_pcalloc(pool, (apr_table_elts(a)->nelts + 1) * sizeof(const char *));
entry = (apr_table_entry_t *) apr_table_elts(a)->elts;
for(i = 0; i < apr_table_elts(a)->nelts; i++) {
args[i] = entry[i].key;
}
args[i] = NULL;
if(cmd == NULL) {
qs_failedexec("can't read password, invalid executable", prg, APR_EGENERAL);
}
if((status = apr_procattr_create(&attr, pool)) != APR_SUCCESS) {
qs_failedexec("while reading password from executable", prg, status);
}
if((status = apr_procattr_cmdtype_set(attr, APR_PROGRAM_PATH)) != APR_SUCCESS) {
qs_failedexec("while reading password from executable", prg, status);
}
if((status = apr_procattr_detach_set(attr, 0)) != APR_SUCCESS) {
qs_failedexec("while reading password from executable", prg, status);
}
if((status = apr_procattr_io_set(attr, APR_FULL_BLOCK, APR_FULL_BLOCK, APR_NO_PIPE)) != APR_SUCCESS) {
qs_failedexec("while reading password from executable", prg, status);
}
if((status = apr_proc_create(&proc, cmd, args, NULL, attr, pool)) != APR_SUCCESS) {
qs_failedexec("could not execute program", prg, status);
} else {
char *e;
status = apr_proc_wait(&proc, NULL, NULL, APR_WAIT);
if(status != APR_CHILD_DONE && status != APR_SUCCESS) {
qs_failedexec("while reading password from executable", prg, status);
}
status = apr_file_read(proc.out, buf, &len);
if(status != APR_SUCCESS) {
qs_failedexec("failed to read password from program", prg, status);
}
e = buf;
while(e && e[0]) {
if((e[0] == LF) || (e[0] == CR)) {
e[0] = '\0';
} else {
e++;
}
}
}
return buf;
}
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