A local copy of OpenSSL from GitHub
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/*
* Copyright 2007-2020 The OpenSSL Project Authors. All Rights Reserved.
* Copyright Nokia 2007-2019
* Copyright Siemens AG 2015-2019
*
* 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 <string.h>
#include <openssl/cmp_util.h>
#include "cmp_local.h" /* just for decls of internal functions defined here */
#include <openssl/cmperr.h>
#include <openssl/err.h> /* should be implied by cmperr.h */
#include <openssl/x509v3.h>
/*
* use trace API for CMP-specific logging, prefixed by "CMP " and severity
*/
int OSSL_CMP_log_open(void) /* is designed to be idempotent */
{
#ifndef OPENSSL_NO_STDIO
BIO *bio = BIO_new_fp(stdout, BIO_NOCLOSE);
if (bio != NULL && OSSL_trace_set_channel(OSSL_TRACE_CATEGORY_CMP, bio))
return 1;
BIO_free(bio);
#endif
CMPerr(0, CMP_R_NO_STDIO);
return 0;
}
void OSSL_CMP_log_close(void) /* is designed to be idempotent */
{
(void)OSSL_trace_set_channel(OSSL_TRACE_CATEGORY_CMP, NULL);
}
/* return >= 0 if level contains logging level, possibly preceded by "CMP " */
#define max_level_len 5 /* = max length of the below strings, e.g., "EMERG" */
static OSSL_CMP_severity parse_level(const char *level)
{
const char *end_level = strchr(level, ':');
int len;
char level_copy[max_level_len + 1];
if (end_level == NULL)
return -1;
if (strncmp(level, OSSL_CMP_LOG_PREFIX,
strlen(OSSL_CMP_LOG_PREFIX)) == 0)
level += strlen(OSSL_CMP_LOG_PREFIX);
len = end_level - level;
if (len > max_level_len)
return -1;
OPENSSL_strlcpy(level_copy, level, len + 1);
return
strcmp(level_copy, "EMERG") == 0 ? OSSL_CMP_LOG_EMERG :
strcmp(level_copy, "ALERT") == 0 ? OSSL_CMP_LOG_ALERT :
strcmp(level_copy, "CRIT") == 0 ? OSSL_CMP_LOG_CRIT :
strcmp(level_copy, "ERROR") == 0 ? OSSL_CMP_LOG_ERR :
strcmp(level_copy, "WARN") == 0 ? OSSL_CMP_LOG_WARNING :
strcmp(level_copy, "NOTE") == 0 ? OSSL_CMP_LOG_NOTICE :
strcmp(level_copy, "INFO") == 0 ? OSSL_CMP_LOG_INFO :
strcmp(level_copy, "DEBUG") == 0 ? OSSL_CMP_LOG_DEBUG :
-1;
}
const char *ossl_cmp_log_parse_metadata(const char *buf,
OSSL_CMP_severity *level,
char **func, char **file, int *line)
{
const char *p_func = buf;
const char *p_file = buf == NULL ? NULL : strchr(buf, ':');
const char *p_level = buf;
const char *msg = buf;
*level = -1;
*func = NULL;
*file = NULL;
*line = 0;
if (p_file != NULL) {
const char *p_line = strchr(++p_file, ':');
if ((*level = parse_level(buf)) < 0 && p_line != NULL) {
/* check if buf contains location info and logging level */
char *p_level_tmp = (char *)p_level;
const long line_number = strtol(++p_line, &p_level_tmp, 10);
p_level = p_level_tmp;
if (p_level > p_line && *(p_level++) == ':') {
if ((*level = parse_level(p_level)) >= 0) {
*func = OPENSSL_strndup(p_func, p_file - 1 - p_func);
*file = OPENSSL_strndup(p_file, p_line - 1 - p_file);
/* no real problem if OPENSSL_strndup() returns NULL */
*line = (int)line_number;
msg = strchr(p_level, ':') + 1;
if (*msg == ' ')
msg++;
}
}
}
}
return msg;
}
#define UNKNOWN_FUNC "(unknown function)" /* the default for OPENSSL_FUNC */
/*
* substitute fallback if component/function name is NULL or empty or contains
* just pseudo-information "(unknown function)" due to -pedantic and macros.h
*/
static const char *improve_location_name(const char *func, const char *fallback)
{
if (fallback == NULL)
return func == NULL ? UNKNOWN_FUNC : func;
return func == NULL || *func == '\0' || strcmp(func, UNKNOWN_FUNC) == 0
? fallback : func;
}
int OSSL_CMP_print_to_bio(BIO *bio, const char *component, const char *file,
int line, OSSL_CMP_severity level, const char *msg)
{
const char *level_string =
level == OSSL_CMP_LOG_EMERG ? "EMERG" :
level == OSSL_CMP_LOG_ALERT ? "ALERT" :
level == OSSL_CMP_LOG_CRIT ? "CRIT" :
level == OSSL_CMP_LOG_ERR ? "error" :
level == OSSL_CMP_LOG_WARNING ? "warning" :
level == OSSL_CMP_LOG_NOTICE ? "NOTE" :
level == OSSL_CMP_LOG_INFO ? "info" :
level == OSSL_CMP_LOG_DEBUG ? "DEBUG" : "(unknown level)";
#ifndef NDEBUG
if (BIO_printf(bio, "%s:%s:%d:", improve_location_name(component, "CMP"),
file, line) < 0)
return 0;
#endif
return BIO_printf(bio, OSSL_CMP_LOG_PREFIX"%s: %s\n",
level_string, msg) >= 0;
}
#define ERR_PRINT_BUF_SIZE 4096
/* this is similar to ERR_print_errors_cb, but uses the CMP-specific cb type */
void OSSL_CMP_print_errors_cb(OSSL_CMP_log_cb_t log_fn)
{
unsigned long err;
char msg[ERR_PRINT_BUF_SIZE];
const char *file = NULL, *func = NULL, *data = NULL;
int line, flags;
while ((err = ERR_get_error_all(&file, &line, &func, &data, &flags)) != 0) {
const char *component =
improve_location_name(func, ERR_lib_error_string(err));
if (!(flags & ERR_TXT_STRING))
data = NULL;
BIO_snprintf(msg, sizeof(msg), "%s%s%s", ERR_reason_error_string(err),
data == NULL || *data == '\0' ? "" : " : ",
data == NULL ? "" : data);
if (log_fn == NULL) {
#ifndef OPENSSL_NO_STDIO
BIO *bio = BIO_new_fp(stderr, BIO_NOCLOSE);
if (bio != NULL) {
OSSL_CMP_print_to_bio(bio, component, file, line,
OSSL_CMP_LOG_ERR, msg);
BIO_free(bio);
}
#else
/* CMPerr(0, CMP_R_NO_STDIO) makes no sense during error printing */
#endif
} else {
if (log_fn(component, file, line, OSSL_CMP_LOG_ERR, msg) <= 0)
break; /* abort outputting the error report */
}
}
}
int ossl_cmp_X509_STORE_add1_certs(X509_STORE *store, STACK_OF(X509) *certs,
int only_self_signed)
{
int i;
if (store == NULL) {
CMPerr(0, CMP_R_NULL_ARGUMENT);
return 0;
}
if (certs == NULL)
return 1;
for (i = 0; i < sk_X509_num(certs); i++) {
X509 *cert = sk_X509_value(certs, i);
if (!only_self_signed || X509_self_signed(cert, 0) == 1)
if (!X509_STORE_add_cert(store, cert)) /* ups cert ref counter */
return 0;
}
return 1;
}
/*-
* Builds a certificate chain starting from <cert>
* using the optional list of intermediate CA certificates <certs>.
* If <store> is NULL builds the chain as far down as possible, ignoring errors.
* Else the chain must reach a trust anchor contained in <store>.
*
* Returns NULL on error, else a pointer to a stack of (up_ref'ed) certificates
* starting with given EE certificate and followed by all available intermediate
* certificates down towards any trust anchor but without including the latter.
*
* NOTE: If a non-NULL stack is returned the caller is responsible for freeing.
* NOTE: In case there is more than one possibility for the chain,
* OpenSSL seems to take the first one; check X509_verify_cert() for details.
*/
/* TODO this should be of more general interest and thus be exported. */
STACK_OF(X509)
*ossl_cmp_build_cert_chain(OSSL_LIB_CTX *libctx, const char *propq,
X509_STORE *store,
STACK_OF(X509) *certs, X509 *cert)
{
STACK_OF(X509) *chain = NULL, *result = NULL;
X509_STORE *ts = store == NULL ? X509_STORE_new() : store;
X509_STORE_CTX *csc = NULL;
if (ts == NULL || cert == NULL) {
CMPerr(0, CMP_R_NULL_ARGUMENT);
goto err;
}
if ((csc = X509_STORE_CTX_new_ex(libctx, propq)) == NULL)
goto err;
if (store == NULL && certs != NULL
&& !ossl_cmp_X509_STORE_add1_certs(ts, certs, 0))
goto err;
if (!X509_STORE_CTX_init(csc, ts, cert,
store == NULL ? NULL : certs))
goto err;
/* disable any cert status/revocation checking etc. */
X509_VERIFY_PARAM_clear_flags(X509_STORE_CTX_get0_param(csc),
~(X509_V_FLAG_USE_CHECK_TIME
| X509_V_FLAG_NO_CHECK_TIME));
if (X509_verify_cert(csc) <= 0 && store != NULL)
goto err;
chain = X509_STORE_CTX_get0_chain(csc);
/* result list to store the up_ref'ed not self-signed certificates */
if ((result = sk_X509_new_null()) == NULL)
goto err;
if (!X509_add_certs(result, chain,
X509_ADD_FLAG_UP_REF | X509_ADD_FLAG_NO_DUP
| X509_ADD_FLAG_NO_SS)) {
sk_X509_free(result);
result = NULL;
}
err:
if (store == NULL)
X509_STORE_free(ts);
X509_STORE_CTX_free(csc);
return result;
}
int ossl_cmp_sk_ASN1_UTF8STRING_push_str(STACK_OF(ASN1_UTF8STRING) *sk,
const char *text)
{
ASN1_UTF8STRING *utf8string;
if (!ossl_assert(sk != NULL && text != NULL))
return 0;
if ((utf8string = ASN1_UTF8STRING_new()) == NULL)
return 0;
if (!ASN1_STRING_set(utf8string, text, -1))
goto err;
if (!sk_ASN1_UTF8STRING_push(sk, utf8string))
goto err;
return 1;
err:
ASN1_UTF8STRING_free(utf8string);
return 0;
}
int ossl_cmp_asn1_octet_string_set1(ASN1_OCTET_STRING **tgt,
const ASN1_OCTET_STRING *src)
{
ASN1_OCTET_STRING *new;
if (tgt == NULL) {
CMPerr(0, CMP_R_NULL_ARGUMENT);
return 0;
}
if (*tgt == src) /* self-assignment */
return 1;
if (src != NULL) {
if ((new = ASN1_OCTET_STRING_dup(src)) == NULL)
return 0;
} else {
new = NULL;
}
ASN1_OCTET_STRING_free(*tgt);
*tgt = new;
return 1;
}
int ossl_cmp_asn1_octet_string_set1_bytes(ASN1_OCTET_STRING **tgt,
const unsigned char *bytes, int len)
{
ASN1_OCTET_STRING *new = NULL;
if (tgt == NULL) {
CMPerr(0, CMP_R_NULL_ARGUMENT);
return 0;
}
if (bytes != NULL) {
if ((new = ASN1_OCTET_STRING_new()) == NULL
|| !(ASN1_OCTET_STRING_set(new, bytes, len))) {
ASN1_OCTET_STRING_free(new);
return 0;
}
}
ASN1_OCTET_STRING_free(*tgt);
*tgt = new;
return 1;
}