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/*
** Copyright 2008, The Android Open Source Project
**
** Licensed 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.
*/
#include "keystore.h"
static DIR *open_keystore(const char *dir)
{
DIR *d;
if ((d = opendir(dir)) == NULL) {
if (mkdir(dir, 0770) < 0) {
LOGE("cannot create dir '%s': %s\n", dir, strerror(errno));
unlink(dir);
return NULL;
}
d = open_keystore(dir);
}
return d;
}
static int list_files(const char *dir, char reply[REPLY_MAX]) {
struct dirent *de;
DIR *d;
if ((d = open_keystore(dir)) == NULL) {
return -1;
}
reply[0]=0;
while ((de = readdir(d))) {
if (de->d_type != DT_REG) continue;
strlcat(reply, " ", REPLY_MAX);
if (strlcat(reply, de->d_name, REPLY_MAX) >= REPLY_MAX) {
LOGE("reply is too long(too many files under '%s'\n", dir);
return -1;
}
}
closedir(d);
return 0;
}
static int copy_keyfile(const char *keystore, const char *srcfile) {
int srcfd, dstfd;
int length;
char buf[2048];
char dstfile[KEYNAME_LENGTH];
const char *filename = strrchr(srcfile, '/');
strlcpy(dstfile, keystore, KEYNAME_LENGTH);
strlcat(dstfile, "/", KEYNAME_LENGTH);
if (strlcat(dstfile, filename ? filename + 1 : srcfile,
KEYNAME_LENGTH) >= KEYNAME_LENGTH) {
LOGE("keyname is too long '%s'\n", srcfile);
return -1;
}
if ((srcfd = open(srcfile, O_RDONLY)) == -1) {
LOGE("Cannot open the original file '%s'\n", srcfile);
return -1;
}
if ((dstfd = open(dstfile, O_CREAT|O_RDWR)) == -1) {
LOGE("Cannot open the destination file '%s'\n", dstfile);
return -1;
}
while((length = read(srcfd, buf, 2048)) > 0) {
write(dstfd, buf, length);
}
close(srcfd);
close(dstfd);
chmod(dstfile, 0440);
return 0;
}
static int install_key(const char *dir, const char *keyfile)
{
struct dirent *de;
DIR *d;
if ((d = open_keystore(dir)) == NULL) {
return -1;
}
return copy_keyfile(dir, keyfile);
}
static int remove_key(const char *dir, const char *keyfile)
{
char dstfile[KEYNAME_LENGTH];
strlcpy(dstfile, dir, KEYNAME_LENGTH);
strlcat(dstfile, "/", KEYNAME_LENGTH);
if (strlcat(dstfile, keyfile, KEYNAME_LENGTH) >= KEYNAME_LENGTH) {
LOGE("keyname is too long '%s'\n", keyfile);
return -1;
}
if (unlink(dstfile)) {
LOGE("cannot delete '%s': %s\n", dstfile, strerror(errno));
return -1;
}
return 0;
}
int list_certs(char reply[REPLY_MAX])
{
return list_files(CERTS_DIR, reply);
}
int list_userkeys(char reply[REPLY_MAX])
{
return list_files(USERKEYS_DIR, reply);
}
int install_cert(const char *certfile)
{
return install_key(CERTS_DIR, certfile);
}
int install_userkey(const char *keyfile)
{
return install_key(USERKEYS_DIR, keyfile);
}
int remove_cert(const char *certfile)
{
return remove_key(CERTS_DIR, certfile);
}
int remove_userkey(const char *keyfile)
{
return remove_key(USERKEYS_DIR, keyfile);
}
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