ref: 009439541d2c6e8af2596f8fb1b4df85861fd212
dir: /third_party/boringssl/src/crypto/conf/conf.c/
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.] */
#include <openssl/conf.h>
#include <assert.h>
#include <string.h>
#include <ctype.h>
#include <openssl/bio.h>
#include <openssl/buf.h>
#include <openssl/err.h>
#include <openssl/lhash.h>
#include <openssl/mem.h>
#include "internal.h"
#include "../internal.h"
struct conf_section_st {
char *name;
// values contains non-owning pointers to the values in the section.
STACK_OF(CONF_VALUE) *values;
};
static const char kDefaultSectionName[] = "default";
static uint32_t conf_section_hash(const CONF_SECTION *s) {
return OPENSSL_strhash(s->name);
}
static int conf_section_cmp(const CONF_SECTION *a, const CONF_SECTION *b) {
return strcmp(a->name, b->name);
}
static uint32_t conf_value_hash(const CONF_VALUE *v) {
const uint32_t section_hash = OPENSSL_strhash(v->section);
const uint32_t name_hash = OPENSSL_strhash(v->name);
return (section_hash << 2) ^ name_hash;
}
static int conf_value_cmp(const CONF_VALUE *a, const CONF_VALUE *b) {
int cmp = strcmp(a->section, b->section);
if (cmp != 0) {
return cmp;
}
return strcmp(a->name, b->name);
}
CONF *NCONF_new(void *method) {
if (method != NULL) {
return NULL;
}
CONF *conf = OPENSSL_malloc(sizeof(CONF));
if (conf == NULL) {
return NULL;
}
conf->sections = lh_CONF_SECTION_new(conf_section_hash, conf_section_cmp);
conf->values = lh_CONF_VALUE_new(conf_value_hash, conf_value_cmp);
if (conf->sections == NULL || conf->values == NULL) {
NCONF_free(conf);
return NULL;
}
return conf;
}
CONF_VALUE *CONF_VALUE_new(void) { return OPENSSL_zalloc(sizeof(CONF_VALUE)); }
static void value_free(CONF_VALUE *value) {
if (value == NULL) {
return;
}
OPENSSL_free(value->section);
OPENSSL_free(value->name);
OPENSSL_free(value->value);
OPENSSL_free(value);
}
static void section_free(CONF_SECTION *section) {
if (section == NULL) {
return;
}
OPENSSL_free(section->name);
sk_CONF_VALUE_free(section->values);
OPENSSL_free(section);
}
static void value_free_arg(CONF_VALUE *value, void *arg) { value_free(value); }
static void section_free_arg(CONF_SECTION *section, void *arg) {
section_free(section);
}
void NCONF_free(CONF *conf) {
if (conf == NULL) {
return;
}
lh_CONF_SECTION_doall_arg(conf->sections, section_free_arg, NULL);
lh_CONF_SECTION_free(conf->sections);
lh_CONF_VALUE_doall_arg(conf->values, value_free_arg, NULL);
lh_CONF_VALUE_free(conf->values);
OPENSSL_free(conf);
}
static CONF_SECTION *NCONF_new_section(const CONF *conf, const char *section) {
CONF_SECTION *s = OPENSSL_malloc(sizeof(CONF_SECTION));
if (!s) {
return NULL;
}
s->name = OPENSSL_strdup(section);
s->values = sk_CONF_VALUE_new_null();
if (s->name == NULL || s->values == NULL) {
goto err;
}
CONF_SECTION *old_section;
if (!lh_CONF_SECTION_insert(conf->sections, &old_section, s)) {
goto err;
}
section_free(old_section);
return s;
err:
section_free(s);
return NULL;
}
static int is_comment(char c) { return c == '#'; }
static int is_quote(char c) { return c == '"' || c == '\'' || c == '`'; }
static int is_esc(char c) { return c == '\\'; }
static int is_conf_ws(char c) {
// This differs from |OPENSSL_isspace| in that CONF does not accept '\v' and
// '\f' as whitespace.
return c == ' ' || c == '\t' || c == '\r' || c == '\n';
}
static int is_name_char(char c) {
// Alphanumeric characters, and a handful of symbols, may appear in value and
// section names without escaping.
return OPENSSL_isalnum(c) || c == '_' || c == '!' || c == '.' || c == '%' ||
c == '&' || c == '*' || c == '+' || c == ',' || c == '/' || c == ';' ||
c == '?' || c == '@' || c == '^' || c == '~' || c == '|' || c == '-';
}
static int str_copy(CONF *conf, char *section, char **pto, char *from) {
int q, to = 0, len = 0;
char v;
BUF_MEM *buf;
buf = BUF_MEM_new();
if (buf == NULL) {
return 0;
}
len = strlen(from) + 1;
if (!BUF_MEM_grow(buf, len)) {
goto err;
}
for (;;) {
if (is_quote(*from)) {
q = *from;
from++;
while (*from != '\0' && *from != q) {
if (is_esc(*from)) {
from++;
if (*from == '\0') {
break;
}
}
buf->data[to++] = *(from++);
}
if (*from == q) {
from++;
}
} else if (is_esc(*from)) {
from++;
v = *(from++);
if (v == '\0') {
break;
} else if (v == 'r') {
v = '\r';
} else if (v == 'n') {
v = '\n';
} else if (v == 'b') {
v = '\b';
} else if (v == 't') {
v = '\t';
}
buf->data[to++] = v;
} else if (*from == '\0') {
break;
} else if (*from == '$') {
// Historically, $foo would expand to a previously-parsed value. This
// feature has been removed as it was unused and is a DoS vector. If
// trying to embed '$' in a line, either escape it or wrap the value in
// quotes.
OPENSSL_PUT_ERROR(CONF, CONF_R_VARIABLE_EXPANSION_NOT_SUPPORTED);
goto err;
} else {
buf->data[to++] = *(from++);
}
}
buf->data[to] = '\0';
OPENSSL_free(*pto);
*pto = buf->data;
OPENSSL_free(buf);
return 1;
err:
BUF_MEM_free(buf);
return 0;
}
static CONF_SECTION *get_section(const CONF *conf, const char *section) {
CONF_SECTION template;
OPENSSL_memset(&template, 0, sizeof(template));
template.name = (char *) section;
return lh_CONF_SECTION_retrieve(conf->sections, &template);
}
const STACK_OF(CONF_VALUE) *NCONF_get_section(const CONF *conf,
const char *section) {
const CONF_SECTION *section_obj = get_section(conf, section);
if (section_obj == NULL) {
return NULL;
}
return section_obj->values;
}
const char *NCONF_get_string(const CONF *conf, const char *section,
const char *name) {
CONF_VALUE template, *value;
if (section == NULL) {
section = kDefaultSectionName;
}
OPENSSL_memset(&template, 0, sizeof(template));
template.section = (char *)section;
template.name = (char *)name;
value = lh_CONF_VALUE_retrieve(conf->values, &template);
if (value == NULL) {
return NULL;
}
return value->value;
}
static int add_string(const CONF *conf, CONF_SECTION *section,
CONF_VALUE *value) {
value->section = OPENSSL_strdup(section->name);
if (value->section == NULL) {
return 0;
}
if (!sk_CONF_VALUE_push(section->values, value)) {
return 0;
}
CONF_VALUE *old_value;
if (!lh_CONF_VALUE_insert(conf->values, &old_value, value)) {
// Remove |value| from |section->values|, so we do not leave a dangling
// pointer.
sk_CONF_VALUE_pop(section->values);
return 0;
}
if (old_value != NULL) {
(void)sk_CONF_VALUE_delete_ptr(section->values, old_value);
value_free(old_value);
}
return 1;
}
static char *eat_ws(char *p) {
while (*p != '\0' && is_conf_ws(*p)) {
p++;
}
return p;
}
static char *scan_esc(char *p) {
assert(p[0] == '\\');
return p[1] == '\0' ? p + 1 : p + 2;
}
static char *eat_name(char *p) {
for (;;) {
if (is_esc(*p)) {
p = scan_esc(p);
continue;
}
if (!is_name_char(*p)) {
return p;
}
p++;
}
}
static char *scan_quote(char *p) {
int q = *p;
p++;
while (*p != '\0' && *p != q) {
if (is_esc(*p)) {
p++;
if (*p == '\0') {
return p;
}
}
p++;
}
if (*p == q) {
p++;
}
return p;
}
static void clear_comments(char *p) {
for (;;) {
if (!is_conf_ws(*p)) {
break;
}
p++;
}
for (;;) {
if (is_comment(*p)) {
*p = '\0';
return;
}
if (is_quote(*p)) {
p = scan_quote(p);
continue;
}
if (is_esc(*p)) {
p = scan_esc(p);
continue;
}
if (*p == '\0') {
return;
} else {
p++;
}
}
}
int NCONF_load_bio(CONF *conf, BIO *in, long *out_error_line) {
static const size_t CONFBUFSIZE = 512;
int bufnum = 0, i, ii;
BUF_MEM *buff = NULL;
char *s, *p, *end;
int again;
long eline = 0;
char btmp[DECIMAL_SIZE(eline) + 1];
CONF_VALUE *v = NULL;
CONF_SECTION *sv = NULL;
char *section = NULL, *buf;
char *start, *psection, *pname;
if ((buff = BUF_MEM_new()) == NULL) {
OPENSSL_PUT_ERROR(CONF, ERR_R_BUF_LIB);
goto err;
}
section = OPENSSL_strdup(kDefaultSectionName);
if (section == NULL) {
goto err;
}
sv = NCONF_new_section(conf, section);
if (sv == NULL) {
OPENSSL_PUT_ERROR(CONF, CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
goto err;
}
bufnum = 0;
again = 0;
for (;;) {
if (!BUF_MEM_grow(buff, bufnum + CONFBUFSIZE)) {
OPENSSL_PUT_ERROR(CONF, ERR_R_BUF_LIB);
goto err;
}
p = &(buff->data[bufnum]);
*p = '\0';
BIO_gets(in, p, CONFBUFSIZE - 1);
p[CONFBUFSIZE - 1] = '\0';
ii = i = strlen(p);
if (i == 0 && !again) {
break;
}
again = 0;
while (i > 0) {
if ((p[i - 1] != '\r') && (p[i - 1] != '\n')) {
break;
} else {
i--;
}
}
// we removed some trailing stuff so there is a new
// line on the end.
if (ii && i == ii) {
again = 1; // long line
} else {
p[i] = '\0';
eline++; // another input line
}
// we now have a line with trailing \r\n removed
// i is the number of bytes
bufnum += i;
v = NULL;
// check for line continuation
if (bufnum >= 1) {
// If we have bytes and the last char '\\' and
// second last char is not '\\'
p = &(buff->data[bufnum - 1]);
if (is_esc(p[0]) && ((bufnum <= 1) || !is_esc(p[-1]))) {
bufnum--;
again = 1;
}
}
if (again) {
continue;
}
bufnum = 0;
buf = buff->data;
clear_comments(buf);
s = eat_ws(buf);
if (*s == '\0') {
continue; // blank line
}
if (*s == '[') {
char *ss;
s++;
start = eat_ws(s);
ss = start;
again:
end = eat_name(ss);
p = eat_ws(end);
if (*p != ']') {
if (*p != '\0' && ss != p) {
ss = p;
goto again;
}
OPENSSL_PUT_ERROR(CONF, CONF_R_MISSING_CLOSE_SQUARE_BRACKET);
goto err;
}
*end = '\0';
if (!str_copy(conf, NULL, §ion, start)) {
goto err;
}
if ((sv = get_section(conf, section)) == NULL) {
sv = NCONF_new_section(conf, section);
}
if (sv == NULL) {
OPENSSL_PUT_ERROR(CONF, CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
goto err;
}
continue;
} else {
pname = s;
psection = NULL;
end = eat_name(s);
if ((end[0] == ':') && (end[1] == ':')) {
*end = '\0';
end += 2;
psection = pname;
pname = end;
end = eat_name(end);
}
p = eat_ws(end);
if (*p != '=') {
OPENSSL_PUT_ERROR(CONF, CONF_R_MISSING_EQUAL_SIGN);
goto err;
}
*end = '\0';
p++;
start = eat_ws(p);
while (*p != '\0') {
p++;
}
p--;
while (p != start && is_conf_ws(*p)) {
p--;
}
p++;
*p = '\0';
if (!(v = CONF_VALUE_new())) {
goto err;
}
if (psection == NULL) {
psection = section;
}
v->name = OPENSSL_strdup(pname);
if (v->name == NULL) {
goto err;
}
if (!str_copy(conf, psection, &(v->value), start)) {
goto err;
}
CONF_SECTION *tv;
if (strcmp(psection, section) != 0) {
if ((tv = get_section(conf, psection)) == NULL) {
tv = NCONF_new_section(conf, psection);
}
if (tv == NULL) {
OPENSSL_PUT_ERROR(CONF, CONF_R_UNABLE_TO_CREATE_NEW_SECTION);
goto err;
}
} else {
tv = sv;
}
if (add_string(conf, tv, v) == 0) {
goto err;
}
v = NULL;
}
}
BUF_MEM_free(buff);
OPENSSL_free(section);
return 1;
err:
BUF_MEM_free(buff);
OPENSSL_free(section);
if (out_error_line != NULL) {
*out_error_line = eline;
}
snprintf(btmp, sizeof btmp, "%ld", eline);
ERR_add_error_data(2, "line ", btmp);
value_free(v);
return 0;
}
int NCONF_load(CONF *conf, const char *filename, long *out_error_line) {
BIO *in = BIO_new_file(filename, "rb");
int ret;
if (in == NULL) {
OPENSSL_PUT_ERROR(CONF, ERR_R_SYS_LIB);
return 0;
}
ret = NCONF_load_bio(conf, in, out_error_line);
BIO_free(in);
return ret;
}
int CONF_parse_list(const char *list, char sep, int remove_whitespace,
int (*list_cb)(const char *elem, size_t len, void *usr),
void *arg) {
int ret;
const char *lstart, *tmpend, *p;
if (list == NULL) {
OPENSSL_PUT_ERROR(CONF, CONF_R_LIST_CANNOT_BE_NULL);
return 0;
}
lstart = list;
for (;;) {
if (remove_whitespace) {
while (*lstart && OPENSSL_isspace((unsigned char)*lstart)) {
lstart++;
}
}
p = strchr(lstart, sep);
if (p == lstart || !*lstart) {
ret = list_cb(NULL, 0, arg);
} else {
if (p) {
tmpend = p - 1;
} else {
tmpend = lstart + strlen(lstart) - 1;
}
if (remove_whitespace) {
while (OPENSSL_isspace((unsigned char)*tmpend)) {
tmpend--;
}
}
ret = list_cb(lstart, tmpend - lstart + 1, arg);
}
if (ret <= 0) {
return ret;
}
if (p == NULL) {
return 1;
}
lstart = p + 1;
}
}
int CONF_modules_load_file(const char *filename, const char *appname,
unsigned long flags) {
return 1;
}
void CONF_modules_free(void) {}
void OPENSSL_config(const char *config_name) {}
void OPENSSL_no_config(void) {}