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openssl/crypto/x509/by_file.c
Зишан Мирза 3ef1b7426b Check file name for not being NULL before opening it 
Fixes #24416

Reviewed-by: Tom Cosgrove <tom.cosgrove@arm.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/25458)
2024-09-26 20:35:26 +02:00

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/*
* Copyright 1995-2024 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <stdio.h>
#include <time.h>
#include <errno.h>
#include "internal/cryptlib.h"
#include <openssl/buffer.h>
#include <openssl/x509.h>
#include <openssl/pem.h>
#include "x509_local.h"
static int by_file_ctrl(X509_LOOKUP *ctx, int cmd, const char *argc,
long argl, char **ret);
static int by_file_ctrl_ex(X509_LOOKUP *ctx, int cmd, const char *argc,
long argl, char **ret, OSSL_LIB_CTX *libctx,
const char *propq);
static X509_LOOKUP_METHOD x509_file_lookup = {
"Load file into cache",
NULL, /* new_item */
NULL, /* free */
NULL, /* init */
NULL, /* shutdown */
by_file_ctrl, /* ctrl */
NULL, /* get_by_subject */
NULL, /* get_by_issuer_serial */
NULL, /* get_by_fingerprint */
NULL, /* get_by_alias */
NULL, /* get_by_subject_ex */
by_file_ctrl_ex, /* ctrl_ex */
};
X509_LOOKUP_METHOD *X509_LOOKUP_file(void)
{
return &x509_file_lookup;
}
static int by_file_ctrl_ex(X509_LOOKUP *ctx, int cmd, const char *argp,
long argl, char **ret, OSSL_LIB_CTX *libctx,
const char *propq)
{
int ok = 0;
const char *file;
switch (cmd) {
case X509_L_FILE_LOAD:
if (argl == X509_FILETYPE_DEFAULT) {
file = ossl_safe_getenv(X509_get_default_cert_file_env());
if (file)
ok = (X509_load_cert_crl_file_ex(ctx, file, X509_FILETYPE_PEM,
libctx, propq) != 0);
else
ok = (X509_load_cert_crl_file_ex(
ctx, X509_get_default_cert_file(),
X509_FILETYPE_PEM, libctx, propq) != 0);
if (!ok)
ERR_raise(ERR_LIB_X509, X509_R_LOADING_DEFAULTS);
} else {
if (argl == X509_FILETYPE_PEM)
ok = (X509_load_cert_crl_file_ex(ctx, argp, X509_FILETYPE_PEM,
libctx, propq) != 0);
else
ok = (X509_load_cert_file_ex(ctx, argp, (int)argl, libctx,
propq) != 0);
}
break;
}
return ok;
}
static int by_file_ctrl(X509_LOOKUP *ctx, int cmd,
const char *argp, long argl, char **ret)
{
return by_file_ctrl_ex(ctx, cmd, argp, argl, ret, NULL, NULL);
}
int X509_load_cert_file_ex(X509_LOOKUP *ctx, const char *file, int type,
OSSL_LIB_CTX *libctx, const char *propq)
{
BIO *in = NULL;
int count = 0;
X509 *x = NULL;
if (file == NULL) {
ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
goto err;
}
in = BIO_new(BIO_s_file());
if ((in == NULL) || (BIO_read_filename(in, file) <= 0)) {
ERR_raise(ERR_LIB_X509, ERR_R_BIO_LIB);
goto err;
}
x = X509_new_ex(libctx, propq);
if (x == NULL) {
ERR_raise(ERR_LIB_X509, ERR_R_ASN1_LIB);
goto err;
}
if (type == X509_FILETYPE_PEM) {
for (;;) {
ERR_set_mark();
if (PEM_read_bio_X509_AUX(in, &x, NULL, "") == NULL) {
if ((ERR_GET_REASON(ERR_peek_last_error()) ==
PEM_R_NO_START_LINE) && (count > 0)) {
ERR_pop_to_mark();
break;
} else {
ERR_clear_last_mark();
if (count == 0) {
ERR_raise(ERR_LIB_X509, X509_R_NO_CERTIFICATE_FOUND);
} else {
ERR_raise(ERR_LIB_X509, ERR_R_PEM_LIB);
count = 0;
}
goto err;
}
}
ERR_clear_last_mark();
if (!X509_STORE_add_cert(ctx->store_ctx, x)) {
count = 0;
goto err;
}
/*
* X509_STORE_add_cert() added a reference rather than a copy,
* so we need a fresh X509 object.
*/
X509_free(x);
x = X509_new_ex(libctx, propq);
if (x == NULL) {
ERR_raise(ERR_LIB_X509, ERR_R_ASN1_LIB);
count = 0;
goto err;
}
count++;
}
} else if (type == X509_FILETYPE_ASN1) {
if (d2i_X509_bio(in, &x) == NULL) {
ERR_raise(ERR_LIB_X509, X509_R_NO_CERTIFICATE_FOUND);
goto err;
}
count = X509_STORE_add_cert(ctx->store_ctx, x);
} else {
ERR_raise(ERR_LIB_X509, X509_R_BAD_X509_FILETYPE);
goto err;
}
err:
X509_free(x);
BIO_free(in);
return count;
}
int X509_load_cert_file(X509_LOOKUP *ctx, const char *file, int type)
{
return X509_load_cert_file_ex(ctx, file, type, NULL, NULL);
}
int X509_load_crl_file(X509_LOOKUP *ctx, const char *file, int type)
{
BIO *in = NULL;
int count = 0;
X509_CRL *x = NULL;
if (file == NULL) {
ERR_raise(ERR_LIB_X509, ERR_R_PASSED_NULL_PARAMETER);
goto err;
}
in = BIO_new(BIO_s_file());
if ((in == NULL) || (BIO_read_filename(in, file) <= 0)) {
ERR_raise(ERR_LIB_X509, ERR_R_BIO_LIB);
goto err;
}
if (type == X509_FILETYPE_PEM) {
for (;;) {
x = PEM_read_bio_X509_CRL(in, NULL, NULL, "");
if (x == NULL) {
if ((ERR_GET_REASON(ERR_peek_last_error()) ==
PEM_R_NO_START_LINE) && (count > 0)) {
ERR_clear_error();
break;
} else {
if (count == 0) {
ERR_raise(ERR_LIB_X509, X509_R_NO_CRL_FOUND);
} else {
ERR_raise(ERR_LIB_X509, ERR_R_PEM_LIB);
count = 0;
}
goto err;
}
}
if (!X509_STORE_add_crl(ctx->store_ctx, x)) {
count = 0;
goto err;
}
count++;
X509_CRL_free(x);
x = NULL;
}
} else if (type == X509_FILETYPE_ASN1) {
x = d2i_X509_CRL_bio(in, NULL);
if (x == NULL) {
ERR_raise(ERR_LIB_X509, X509_R_NO_CRL_FOUND);
goto err;
}
count = X509_STORE_add_crl(ctx->store_ctx, x);
} else {
ERR_raise(ERR_LIB_X509, X509_R_BAD_X509_FILETYPE);
goto err;
}
err:
X509_CRL_free(x);
BIO_free(in);
return count;
}
int X509_load_cert_crl_file_ex(X509_LOOKUP *ctx, const char *file, int type,
OSSL_LIB_CTX *libctx, const char *propq)
{
STACK_OF(X509_INFO) *inf = NULL;
X509_INFO *itmp = NULL;
BIO *in = NULL;
int i, count = 0;
if (type != X509_FILETYPE_PEM)
return X509_load_cert_file_ex(ctx, file, type, libctx, propq);
in = BIO_new_file(file, "r");
if (in == NULL) {
ERR_raise(ERR_LIB_X509, ERR_R_BIO_LIB);
return 0;
}
inf = PEM_X509_INFO_read_bio_ex(in, NULL, NULL, "", libctx, propq);
BIO_free(in);
if (inf == NULL) {
ERR_raise(ERR_LIB_X509, ERR_R_PEM_LIB);
return 0;
}
for (i = 0; i < sk_X509_INFO_num(inf); i++) {
itmp = sk_X509_INFO_value(inf, i);
if (itmp->x509) {
if (!X509_STORE_add_cert(ctx->store_ctx, itmp->x509)) {
count = 0;
goto err;
}
count++;
}
if (itmp->crl) {
if (!X509_STORE_add_crl(ctx->store_ctx, itmp->crl)) {
count = 0;
goto err;
}
count++;
}
}
if (count == 0)
ERR_raise(ERR_LIB_X509, X509_R_NO_CERTIFICATE_OR_CRL_FOUND);
err:
sk_X509_INFO_pop_free(inf, X509_INFO_free);
return count;
}
int X509_load_cert_crl_file(X509_LOOKUP *ctx, const char *file, int type)
{
return X509_load_cert_crl_file_ex(ctx, file, type, NULL, NULL);
}
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