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openssl/crypto/x509/v3_conf.c
Richard Levitte e077455e9e Stop raising ERR_R_MALLOC_FAILURE in most places 
Since OPENSSL_malloc() and friends report ERR_R_MALLOC_FAILURE, and
at least handle the file name and line number they are called from,
there's no need to report ERR_R_MALLOC_FAILURE where they are called
directly, or when SSLfatal() and RLAYERfatal() is used, the reason
`ERR_R_MALLOC_FAILURE` is changed to `ERR_R_CRYPTO_LIB`.

There were a number of places where `ERR_R_MALLOC_FAILURE` was reported
even though it was a function from a different sub-system that was
called.  Those places are changed to report ERR_R_{lib}_LIB, where
{lib} is the name of that sub-system.
Some of them are tricky to get right, as we have a lot of functions
that belong in the ASN1 sub-system, and all the `sk_` calls or from
the CRYPTO sub-system.

Some extra adaptation was necessary where there were custom OPENSSL_malloc()
wrappers, and some bugs are fixed alongside these changes.

Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Hugo Landau <hlandau@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/19301)
2022-10-05 14:02:03 +02:00

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/*
* Copyright 1999-2021 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
*/
/* extension creation utilities */
#include <stdio.h>
#include "crypto/ctype.h"
#include "internal/cryptlib.h"
#include <openssl/conf.h>
#include <openssl/x509.h>
#include "crypto/x509.h"
#include <openssl/x509v3.h>
static int v3_check_critical(const char **value);
static int v3_check_generic(const char **value);
static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
int crit, const char *value);
static X509_EXTENSION *v3_generic_extension(const char *ext, const char *value,
int crit, int type,
X509V3_CTX *ctx);
static char *conf_lhash_get_string(void *db, const char *section, const char *value);
static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, const char *section);
static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method,
int ext_nid, int crit, void *ext_struc);
static unsigned char *generic_asn1(const char *value, X509V3_CTX *ctx,
long *ext_len);
static X509_EXTENSION *X509V3_EXT_nconf_int(CONF *conf, X509V3_CTX *ctx,
const char *section,
const char *name, const char *value)
{
int crit;
int ext_type;
X509_EXTENSION *ret;
crit = v3_check_critical(&value);
if ((ext_type = v3_check_generic(&value)))
return v3_generic_extension(name, value, crit, ext_type, ctx);
ret = do_ext_nconf(conf, ctx, OBJ_sn2nid(name), crit, value);
if (!ret) {
if (section != NULL)
ERR_raise_data(ERR_LIB_X509V3, X509V3_R_ERROR_IN_EXTENSION,
"section=%s, name=%s, value=%s",
section, name, value);
else
ERR_raise_data(ERR_LIB_X509V3, X509V3_R_ERROR_IN_EXTENSION,
"name=%s, value=%s", name, value);
}
return ret;
}
X509_EXTENSION *X509V3_EXT_nconf(CONF *conf, X509V3_CTX *ctx, const char *name,
const char *value)
{
return X509V3_EXT_nconf_int(conf, ctx, NULL, name, value);
}
X509_EXTENSION *X509V3_EXT_nconf_nid(CONF *conf, X509V3_CTX *ctx, int ext_nid,
const char *value)
{
int crit;
int ext_type;
crit = v3_check_critical(&value);
if ((ext_type = v3_check_generic(&value)))
return v3_generic_extension(OBJ_nid2sn(ext_nid),
value, crit, ext_type, ctx);
return do_ext_nconf(conf, ctx, ext_nid, crit, value);
}
/* CONF *conf: Config file */
/* char *value: Value */
static X509_EXTENSION *do_ext_nconf(CONF *conf, X509V3_CTX *ctx, int ext_nid,
int crit, const char *value)
{
const X509V3_EXT_METHOD *method;
X509_EXTENSION *ext;
STACK_OF(CONF_VALUE) *nval;
void *ext_struc;
if (ext_nid == NID_undef) {
ERR_raise(ERR_LIB_X509V3, X509V3_R_UNKNOWN_EXTENSION_NAME);
return NULL;
}
if ((method = X509V3_EXT_get_nid(ext_nid)) == NULL) {
ERR_raise(ERR_LIB_X509V3, X509V3_R_UNKNOWN_EXTENSION);
return NULL;
}
/* Now get internal extension representation based on type */
if (method->v2i) {
if (*value == '@')
nval = NCONF_get_section(conf, value + 1);
else
nval = X509V3_parse_list(value);
if (nval == NULL || sk_CONF_VALUE_num(nval) <= 0) {
ERR_raise_data(ERR_LIB_X509V3, X509V3_R_INVALID_EXTENSION_STRING,
"name=%s,section=%s", OBJ_nid2sn(ext_nid), value);
if (*value != '@')
sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
return NULL;
}
ext_struc = method->v2i(method, ctx, nval);
if (*value != '@')
sk_CONF_VALUE_pop_free(nval, X509V3_conf_free);
if (!ext_struc)
return NULL;
} else if (method->s2i) {
if ((ext_struc = method->s2i(method, ctx, value)) == NULL)
return NULL;
} else if (method->r2i) {
if (!ctx->db || !ctx->db_meth) {
ERR_raise(ERR_LIB_X509V3, X509V3_R_NO_CONFIG_DATABASE);
return NULL;
}
if ((ext_struc = method->r2i(method, ctx, value)) == NULL)
return NULL;
} else {
ERR_raise_data(ERR_LIB_X509V3, X509V3_R_EXTENSION_SETTING_NOT_SUPPORTED,
"name=%s", OBJ_nid2sn(ext_nid));
return NULL;
}
ext = do_ext_i2d(method, ext_nid, crit, ext_struc);
if (method->it)
ASN1_item_free(ext_struc, ASN1_ITEM_ptr(method->it));
else
method->ext_free(ext_struc);
return ext;
}
static X509_EXTENSION *do_ext_i2d(const X509V3_EXT_METHOD *method,
int ext_nid, int crit, void *ext_struc)
{
unsigned char *ext_der = NULL;
int ext_len;
ASN1_OCTET_STRING *ext_oct = NULL;
X509_EXTENSION *ext;
/* Convert internal representation to DER */
if (method->it) {
ext_der = NULL;
ext_len =
ASN1_item_i2d(ext_struc, &ext_der, ASN1_ITEM_ptr(method->it));
if (ext_len < 0) {
ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
goto err;
}
} else {
unsigned char *p;
ext_len = method->i2d(ext_struc, NULL);
if (ext_len <= 0) {
ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
goto err;
}
if ((ext_der = OPENSSL_malloc(ext_len)) == NULL)
goto err;
p = ext_der;
method->i2d(ext_struc, &p);
}
if ((ext_oct = ASN1_OCTET_STRING_new()) == NULL) {
ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
goto err;
}
ext_oct->data = ext_der;
ext_der = NULL;
ext_oct->length = ext_len;
ext = X509_EXTENSION_create_by_NID(NULL, ext_nid, crit, ext_oct);
if (!ext) {
ERR_raise(ERR_LIB_X509V3, ERR_R_X509V3_LIB);
goto err;
}
ASN1_OCTET_STRING_free(ext_oct);
return ext;
err:
OPENSSL_free(ext_der);
ASN1_OCTET_STRING_free(ext_oct);
return NULL;
}
/* Given an internal structure, nid and critical flag create an extension */
X509_EXTENSION *X509V3_EXT_i2d(int ext_nid, int crit, void *ext_struc)
{
const X509V3_EXT_METHOD *method;
if ((method = X509V3_EXT_get_nid(ext_nid)) == NULL) {
ERR_raise(ERR_LIB_X509V3, X509V3_R_UNKNOWN_EXTENSION);
return NULL;
}
return do_ext_i2d(method, ext_nid, crit, ext_struc);
}
/* Check the extension string for critical flag */
static int v3_check_critical(const char **value)
{
const char *p = *value;
if (!CHECK_AND_SKIP_PREFIX(p, "critical,"))
return 0;
while (ossl_isspace(*p))
p++;
*value = p;
return 1;
}
/* Check extension string for generic extension and return the type */
static int v3_check_generic(const char **value)
{
int gen_type = 0;
const char *p = *value;
if (CHECK_AND_SKIP_PREFIX(p, "DER:")) {
gen_type = 1;
} else if (CHECK_AND_SKIP_PREFIX(p, "ASN1:")) {
gen_type = 2;
} else
return 0;
while (ossl_isspace(*p))
p++;
*value = p;
return gen_type;
}
/* Create a generic extension: for now just handle DER type */
static X509_EXTENSION *v3_generic_extension(const char *ext, const char *value,
int crit, int gen_type,
X509V3_CTX *ctx)
{
unsigned char *ext_der = NULL;
long ext_len = 0;
ASN1_OBJECT *obj = NULL;
ASN1_OCTET_STRING *oct = NULL;
X509_EXTENSION *extension = NULL;
if ((obj = OBJ_txt2obj(ext, 0)) == NULL) {
ERR_raise_data(ERR_LIB_X509V3, X509V3_R_EXTENSION_NAME_ERROR,
"name=%s", ext);
goto err;
}
if (gen_type == 1)
ext_der = OPENSSL_hexstr2buf(value, &ext_len);
else if (gen_type == 2)
ext_der = generic_asn1(value, ctx, &ext_len);
if (ext_der == NULL) {
ERR_raise_data(ERR_LIB_X509V3, X509V3_R_EXTENSION_VALUE_ERROR,
"value=%s", value);
goto err;
}
if ((oct = ASN1_OCTET_STRING_new()) == NULL) {
ERR_raise(ERR_LIB_X509V3, ERR_R_ASN1_LIB);
goto err;
}
oct->data = ext_der;
oct->length = ext_len;
ext_der = NULL;
extension = X509_EXTENSION_create_by_OBJ(NULL, obj, crit, oct);
err:
ASN1_OBJECT_free(obj);
ASN1_OCTET_STRING_free(oct);
OPENSSL_free(ext_der);
return extension;
}
static unsigned char *generic_asn1(const char *value, X509V3_CTX *ctx,
long *ext_len)
{
ASN1_TYPE *typ;
unsigned char *ext_der = NULL;
typ = ASN1_generate_v3(value, ctx);
if (typ == NULL)
return NULL;
*ext_len = i2d_ASN1_TYPE(typ, &ext_der);
ASN1_TYPE_free(typ);
return ext_der;
}
static void delete_ext(STACK_OF(X509_EXTENSION) *sk, X509_EXTENSION *dext)
{
int idx;
ASN1_OBJECT *obj;
obj = X509_EXTENSION_get_object(dext);
while ((idx = X509v3_get_ext_by_OBJ(sk, obj, -1)) >= 0)
X509_EXTENSION_free(X509v3_delete_ext(sk, idx));
}
/*
* This is the main function: add a bunch of extensions based on a config
* file section to an extension STACK. Just check in case sk == NULL.
* Note that on error new elements may have been added to *sk if sk != NULL.
*/
int X509V3_EXT_add_nconf_sk(CONF *conf, X509V3_CTX *ctx, const char *section,
STACK_OF(X509_EXTENSION) **sk)
{
X509_EXTENSION *ext;
STACK_OF(CONF_VALUE) *nval;
const CONF_VALUE *val;
int i, akid = -1, skid = -1;
if ((nval = NCONF_get_section(conf, section)) == NULL)
return 0;
for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
val = sk_CONF_VALUE_value(nval, i);
if (strcmp(val->name, "authorityKeyIdentifier") == 0)
akid = i;
else if (strcmp(val->name, "subjectKeyIdentifier") == 0)
skid = i;
}
for (i = 0; i < sk_CONF_VALUE_num(nval); i++) {
val = sk_CONF_VALUE_value(nval, i);
if (skid > akid && akid >= 0) {
/* make sure SKID is handled before AKID */
if (i == akid)
val = sk_CONF_VALUE_value(nval, skid);
else if (i == skid)
val = sk_CONF_VALUE_value(nval, akid);
}
if ((ext = X509V3_EXT_nconf_int(conf, ctx, val->section,
val->name, val->value)) == NULL)
return 0;
if (sk != NULL) {
if (ctx->flags == X509V3_CTX_REPLACE)
delete_ext(*sk, ext);
if (X509v3_add_ext(sk, ext, -1) == NULL) {
X509_EXTENSION_free(ext);
return 0;
}
}
X509_EXTENSION_free(ext);
}
return 1;
}
/*
* Add extensions to a certificate. Just check in case cert == NULL.
* Note that on error new elements may remain added to cert if cert != NULL.
*/
int X509V3_EXT_add_nconf(CONF *conf, X509V3_CTX *ctx, const char *section,
X509 *cert)
{
STACK_OF(X509_EXTENSION) **sk = NULL;
if (cert != NULL)
sk = &cert->cert_info.extensions;
return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
}
/*
* Add extensions to a CRL. Just check in case crl == NULL.
* Note that on error new elements may remain added to crl if crl != NULL.
*/
int X509V3_EXT_CRL_add_nconf(CONF *conf, X509V3_CTX *ctx, const char *section,
X509_CRL *crl)
{
STACK_OF(X509_EXTENSION) **sk = NULL;
if (crl != NULL)
sk = &crl->crl.extensions;
return X509V3_EXT_add_nconf_sk(conf, ctx, section, sk);
}
/*
* Add extensions to certificate request. Just check in case req is NULL.
* Note that on error new elements may remain added to req if req != NULL.
*/
int X509V3_EXT_REQ_add_nconf(CONF *conf, X509V3_CTX *ctx, const char *section,
X509_REQ *req)
{
STACK_OF(X509_EXTENSION) *exts = NULL;
int ret = X509V3_EXT_add_nconf_sk(conf, ctx, section, &exts);
if (ret && req != NULL && exts != NULL)
ret = X509_REQ_add_extensions(req, exts);
sk_X509_EXTENSION_pop_free(exts, X509_EXTENSION_free);
return ret;
}
/* Config database functions */
char *X509V3_get_string(X509V3_CTX *ctx, const char *name, const char *section)
{
if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_string) {
ERR_raise(ERR_LIB_X509V3, X509V3_R_OPERATION_NOT_DEFINED);
return NULL;
}
if (ctx->db_meth->get_string)
return ctx->db_meth->get_string(ctx->db, name, section);
return NULL;
}
STACK_OF(CONF_VALUE) *X509V3_get_section(X509V3_CTX *ctx, const char *section)
{
if (!ctx->db || !ctx->db_meth || !ctx->db_meth->get_section) {
ERR_raise(ERR_LIB_X509V3, X509V3_R_OPERATION_NOT_DEFINED);
return NULL;
}
if (ctx->db_meth->get_section)
return ctx->db_meth->get_section(ctx->db, section);
return NULL;
}
void X509V3_string_free(X509V3_CTX *ctx, char *str)
{
if (!str)
return;
if (ctx->db_meth->free_string)
ctx->db_meth->free_string(ctx->db, str);
}
void X509V3_section_free(X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *section)
{
if (!section)
return;
if (ctx->db_meth->free_section)
ctx->db_meth->free_section(ctx->db, section);
}
static char *nconf_get_string(void *db, const char *section, const char *value)
{
return NCONF_get_string(db, section, value);
}
static STACK_OF(CONF_VALUE) *nconf_get_section(void *db, const char *section)
{
return NCONF_get_section(db, section);
}
static X509V3_CONF_METHOD nconf_method = {
nconf_get_string,
nconf_get_section,
NULL,
NULL
};
void X509V3_set_nconf(X509V3_CTX *ctx, CONF *conf)
{
if (ctx == NULL) {
ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_NULL_PARAMETER);
return;
}
ctx->db_meth = &nconf_method;
ctx->db = conf;
}
void X509V3_set_ctx(X509V3_CTX *ctx, X509 *issuer, X509 *subj, X509_REQ *req,
X509_CRL *crl, int flags)
{
if (ctx == NULL) {
ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_NULL_PARAMETER);
return;
}
ctx->flags = flags;
ctx->issuer_cert = issuer;
ctx->subject_cert = subj;
ctx->subject_req = req;
ctx->crl = crl;
ctx->db_meth = NULL;
ctx->db = NULL;
ctx->issuer_pkey = NULL;
}
/* For API backward compatibility, this is separate from X509V3_set_ctx() */
int X509V3_set_issuer_pkey(X509V3_CTX *ctx, EVP_PKEY *pkey)
{
if (ctx == NULL) {
ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_NULL_PARAMETER);
return 0;
}
if (ctx->subject_cert == NULL && pkey != NULL) {
ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_INVALID_ARGUMENT);
return 0;
}
ctx->issuer_pkey = pkey;
return 1;
}
/* Old conf compatibility functions */
X509_EXTENSION *X509V3_EXT_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
const char *name, const char *value)
{
CONF *ctmp;
X509_EXTENSION *ret;
if ((ctmp = NCONF_new(NULL)) == NULL)
return NULL;
CONF_set_nconf(ctmp, conf);
ret = X509V3_EXT_nconf(ctmp, ctx, name, value);
CONF_set_nconf(ctmp, NULL);
NCONF_free(ctmp);
return ret;
}
X509_EXTENSION *X509V3_EXT_conf_nid(LHASH_OF(CONF_VALUE) *conf,
X509V3_CTX *ctx, int ext_nid, const char *value)
{
CONF *ctmp;
X509_EXTENSION *ret;
if ((ctmp = NCONF_new(NULL)) == NULL)
return NULL;
CONF_set_nconf(ctmp, conf);
ret = X509V3_EXT_nconf_nid(ctmp, ctx, ext_nid, value);
CONF_set_nconf(ctmp, NULL);
NCONF_free(ctmp);
return ret;
}
static char *conf_lhash_get_string(void *db, const char *section, const char *value)
{
return CONF_get_string(db, section, value);
}
static STACK_OF(CONF_VALUE) *conf_lhash_get_section(void *db, const char *section)
{
return CONF_get_section(db, section);
}
static X509V3_CONF_METHOD conf_lhash_method = {
conf_lhash_get_string,
conf_lhash_get_section,
NULL,
NULL
};
void X509V3_set_conf_lhash(X509V3_CTX *ctx, LHASH_OF(CONF_VALUE) *lhash)
{
if (ctx == NULL) {
ERR_raise(ERR_LIB_X509V3, ERR_R_PASSED_NULL_PARAMETER);
return;
}
ctx->db_meth = &conf_lhash_method;
ctx->db = lhash;
}
int X509V3_EXT_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
const char *section, X509 *cert)
{
CONF *ctmp;
int ret;
if ((ctmp = NCONF_new(NULL)) == NULL)
return 0;
CONF_set_nconf(ctmp, conf);
ret = X509V3_EXT_add_nconf(ctmp, ctx, section, cert);
CONF_set_nconf(ctmp, NULL);
NCONF_free(ctmp);
return ret;
}
/* Same as above but for a CRL */
int X509V3_EXT_CRL_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
const char *section, X509_CRL *crl)
{
CONF *ctmp;
int ret;
if ((ctmp = NCONF_new(NULL)) == NULL)
return 0;
CONF_set_nconf(ctmp, conf);
ret = X509V3_EXT_CRL_add_nconf(ctmp, ctx, section, crl);
CONF_set_nconf(ctmp, NULL);
NCONF_free(ctmp);
return ret;
}
/* Add extensions to certificate request */
int X509V3_EXT_REQ_add_conf(LHASH_OF(CONF_VALUE) *conf, X509V3_CTX *ctx,
const char *section, X509_REQ *req)
{
CONF *ctmp;
int ret;
if ((ctmp = NCONF_new(NULL)) == NULL)
return 0;
CONF_set_nconf(ctmp, conf);
ret = X509V3_EXT_REQ_add_nconf(ctmp, ctx, section, req);
CONF_set_nconf(ctmp, NULL);
NCONF_free(ctmp);
return ret;
}
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