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openssl/crypto/err/err.c
Richard Levitte 145419423e ERR: preserve system error number in a few more places 
It turns out that intialization may change the error number, so we
need to preserve the system error number in functions where
initialization is called for.
These are ERR_get_state() and err_shelve_state()

Fixes #7897

Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7902)

(cherry picked from commit 91c5473035)
2018-12-14 23:17:06 +01:00

929 lines
24 KiB
C
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/*
* Copyright 1995-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (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 <stdarg.h>
#include <string.h>
#include "internal/cryptlib_int.h"
#include "internal/err.h"
#include "internal/err_int.h"
#include <openssl/err.h>
#include <openssl/crypto.h>
#include <openssl/buffer.h>
#include <openssl/bio.h>
#include <openssl/opensslconf.h>
#include "internal/thread_once.h"
#include "internal/ctype.h"
#include "internal/constant_time_locl.h"
#include "e_os.h"
static int err_load_strings(const ERR_STRING_DATA *str);
static void ERR_STATE_free(ERR_STATE *s);
#ifndef OPENSSL_NO_ERR
static ERR_STRING_DATA ERR_str_libraries[] = {
{ERR_PACK(ERR_LIB_NONE, 0, 0), "unknown library"},
{ERR_PACK(ERR_LIB_SYS, 0, 0), "system library"},
{ERR_PACK(ERR_LIB_BN, 0, 0), "bignum routines"},
{ERR_PACK(ERR_LIB_RSA, 0, 0), "rsa routines"},
{ERR_PACK(ERR_LIB_DH, 0, 0), "Diffie-Hellman routines"},
{ERR_PACK(ERR_LIB_EVP, 0, 0), "digital envelope routines"},
{ERR_PACK(ERR_LIB_BUF, 0, 0), "memory buffer routines"},
{ERR_PACK(ERR_LIB_OBJ, 0, 0), "object identifier routines"},
{ERR_PACK(ERR_LIB_PEM, 0, 0), "PEM routines"},
{ERR_PACK(ERR_LIB_DSA, 0, 0), "dsa routines"},
{ERR_PACK(ERR_LIB_X509, 0, 0), "x509 certificate routines"},
{ERR_PACK(ERR_LIB_ASN1, 0, 0), "asn1 encoding routines"},
{ERR_PACK(ERR_LIB_CONF, 0, 0), "configuration file routines"},
{ERR_PACK(ERR_LIB_CRYPTO, 0, 0), "common libcrypto routines"},
{ERR_PACK(ERR_LIB_EC, 0, 0), "elliptic curve routines"},
{ERR_PACK(ERR_LIB_ECDSA, 0, 0), "ECDSA routines"},
{ERR_PACK(ERR_LIB_ECDH, 0, 0), "ECDH routines"},
{ERR_PACK(ERR_LIB_SSL, 0, 0), "SSL routines"},
{ERR_PACK(ERR_LIB_BIO, 0, 0), "BIO routines"},
{ERR_PACK(ERR_LIB_PKCS7, 0, 0), "PKCS7 routines"},
{ERR_PACK(ERR_LIB_X509V3, 0, 0), "X509 V3 routines"},
{ERR_PACK(ERR_LIB_PKCS12, 0, 0), "PKCS12 routines"},
{ERR_PACK(ERR_LIB_RAND, 0, 0), "random number generator"},
{ERR_PACK(ERR_LIB_DSO, 0, 0), "DSO support routines"},
{ERR_PACK(ERR_LIB_TS, 0, 0), "time stamp routines"},
{ERR_PACK(ERR_LIB_ENGINE, 0, 0), "engine routines"},
{ERR_PACK(ERR_LIB_OCSP, 0, 0), "OCSP routines"},
{ERR_PACK(ERR_LIB_UI, 0, 0), "UI routines"},
{ERR_PACK(ERR_LIB_FIPS, 0, 0), "FIPS routines"},
{ERR_PACK(ERR_LIB_CMS, 0, 0), "CMS routines"},
{ERR_PACK(ERR_LIB_HMAC, 0, 0), "HMAC routines"},
{ERR_PACK(ERR_LIB_CT, 0, 0), "CT routines"},
{ERR_PACK(ERR_LIB_ASYNC, 0, 0), "ASYNC routines"},
{ERR_PACK(ERR_LIB_KDF, 0, 0), "KDF routines"},
{ERR_PACK(ERR_LIB_OSSL_STORE, 0, 0), "STORE routines"},
{ERR_PACK(ERR_LIB_SM2, 0, 0), "SM2 routines"},
{0, NULL},
};
static ERR_STRING_DATA ERR_str_functs[] = {
{ERR_PACK(0, SYS_F_FOPEN, 0), "fopen"},
{ERR_PACK(0, SYS_F_CONNECT, 0), "connect"},
{ERR_PACK(0, SYS_F_GETSERVBYNAME, 0), "getservbyname"},
{ERR_PACK(0, SYS_F_SOCKET, 0), "socket"},
{ERR_PACK(0, SYS_F_IOCTLSOCKET, 0), "ioctlsocket"},
{ERR_PACK(0, SYS_F_BIND, 0), "bind"},
{ERR_PACK(0, SYS_F_LISTEN, 0), "listen"},
{ERR_PACK(0, SYS_F_ACCEPT, 0), "accept"},
# ifdef OPENSSL_SYS_WINDOWS
{ERR_PACK(0, SYS_F_WSASTARTUP, 0), "WSAstartup"},
# endif
{ERR_PACK(0, SYS_F_OPENDIR, 0), "opendir"},
{ERR_PACK(0, SYS_F_FREAD, 0), "fread"},
{ERR_PACK(0, SYS_F_GETADDRINFO, 0), "getaddrinfo"},
{ERR_PACK(0, SYS_F_GETNAMEINFO, 0), "getnameinfo"},
{ERR_PACK(0, SYS_F_SETSOCKOPT, 0), "setsockopt"},
{ERR_PACK(0, SYS_F_GETSOCKOPT, 0), "getsockopt"},
{ERR_PACK(0, SYS_F_GETSOCKNAME, 0), "getsockname"},
{ERR_PACK(0, SYS_F_GETHOSTBYNAME, 0), "gethostbyname"},
{ERR_PACK(0, SYS_F_FFLUSH, 0), "fflush"},
{ERR_PACK(0, SYS_F_OPEN, 0), "open"},
{ERR_PACK(0, SYS_F_CLOSE, 0), "close"},
{ERR_PACK(0, SYS_F_IOCTL, 0), "ioctl"},
{ERR_PACK(0, SYS_F_STAT, 0), "stat"},
{ERR_PACK(0, SYS_F_FCNTL, 0), "fcntl"},
{ERR_PACK(0, SYS_F_FSTAT, 0), "fstat"},
{0, NULL},
};
static ERR_STRING_DATA ERR_str_reasons[] = {
{ERR_R_SYS_LIB, "system lib"},
{ERR_R_BN_LIB, "BN lib"},
{ERR_R_RSA_LIB, "RSA lib"},
{ERR_R_DH_LIB, "DH lib"},
{ERR_R_EVP_LIB, "EVP lib"},
{ERR_R_BUF_LIB, "BUF lib"},
{ERR_R_OBJ_LIB, "OBJ lib"},
{ERR_R_PEM_LIB, "PEM lib"},
{ERR_R_DSA_LIB, "DSA lib"},
{ERR_R_X509_LIB, "X509 lib"},
{ERR_R_ASN1_LIB, "ASN1 lib"},
{ERR_R_EC_LIB, "EC lib"},
{ERR_R_BIO_LIB, "BIO lib"},
{ERR_R_PKCS7_LIB, "PKCS7 lib"},
{ERR_R_X509V3_LIB, "X509V3 lib"},
{ERR_R_ENGINE_LIB, "ENGINE lib"},
{ERR_R_UI_LIB, "UI lib"},
{ERR_R_OSSL_STORE_LIB, "STORE lib"},
{ERR_R_ECDSA_LIB, "ECDSA lib"},
{ERR_R_NESTED_ASN1_ERROR, "nested asn1 error"},
{ERR_R_MISSING_ASN1_EOS, "missing asn1 eos"},
{ERR_R_FATAL, "fatal"},
{ERR_R_MALLOC_FAILURE, "malloc failure"},
{ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED,
"called a function you should not call"},
{ERR_R_PASSED_NULL_PARAMETER, "passed a null parameter"},
{ERR_R_INTERNAL_ERROR, "internal error"},
{ERR_R_DISABLED, "called a function that was disabled at compile-time"},
{ERR_R_INIT_FAIL, "init fail"},
{ERR_R_OPERATION_FAIL, "operation fail"},
{0, NULL},
};
#endif
static CRYPTO_ONCE err_init = CRYPTO_ONCE_STATIC_INIT;
static int set_err_thread_local;
static CRYPTO_THREAD_LOCAL err_thread_local;
static CRYPTO_ONCE err_string_init = CRYPTO_ONCE_STATIC_INIT;
static CRYPTO_RWLOCK *err_string_lock;
static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *);
/*
* The internal state
*/
static LHASH_OF(ERR_STRING_DATA) *int_error_hash = NULL;
static int int_err_library_number = ERR_LIB_USER;
static unsigned long get_error_values(int inc, int top, const char **file,
int *line, const char **data,
int *flags);
static unsigned long err_string_data_hash(const ERR_STRING_DATA *a)
{
unsigned long ret, l;
l = a->error;
ret = l ^ ERR_GET_LIB(l) ^ ERR_GET_FUNC(l);
return (ret ^ ret % 19 * 13);
}
static int err_string_data_cmp(const ERR_STRING_DATA *a,
const ERR_STRING_DATA *b)
{
if (a->error == b->error)
return 0;
return a->error > b->error ? 1 : -1;
}
static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *d)
{
ERR_STRING_DATA *p = NULL;
CRYPTO_THREAD_read_lock(err_string_lock);
p = lh_ERR_STRING_DATA_retrieve(int_error_hash, d);
CRYPTO_THREAD_unlock(err_string_lock);
return p;
}
#ifndef OPENSSL_NO_ERR
/* A measurement on Linux 2018-11-21 showed about 3.5kib */
# define SPACE_SYS_STR_REASONS 4 * 1024
# define NUM_SYS_STR_REASONS 127
static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
/*
* SYS_str_reasons is filled with copies of strerror() results at
* initialization. 'errno' values up to 127 should cover all usual errors,
* others will be displayed numerically by ERR_error_string. It is crucial
* that we have something for each reason code that occurs in
* ERR_str_reasons, or bogus reason strings will be returned for SYSerr(),
* which always gets an errno value and never one of those 'standard' reason
* codes.
*/
static void build_SYS_str_reasons(void)
{
/* OPENSSL_malloc cannot be used here, use static storage instead */
static char strerror_pool[SPACE_SYS_STR_REASONS];
char *cur = strerror_pool;
size_t cnt = 0;
static int init = 1;
int i;
int saveerrno = get_last_sys_error();
CRYPTO_THREAD_write_lock(err_string_lock);
if (!init) {
CRYPTO_THREAD_unlock(err_string_lock);
return;
}
for (i = 1; i <= NUM_SYS_STR_REASONS; i++) {
ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
str->error = ERR_PACK(ERR_LIB_SYS, 0, i);
if (str->string == NULL) {
if (openssl_strerror_r(i, cur, sizeof(strerror_pool) - cnt)) {
size_t l = strlen(cur);
str->string = cur;
cnt += l;
if (cnt > sizeof(strerror_pool))
cnt = sizeof(strerror_pool);
cur += l;
/*
* VMS has an unusual quirk of adding spaces at the end of
* some (most? all?) messages. Lets trim them off.
*/
while (ossl_isspace(cur[-1])) {
cur--;
cnt--;
}
*cur++ = '\0';
cnt++;
}
}
if (str->string == NULL)
str->string = "unknown";
}
/*
* Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL}, as
* required by ERR_load_strings.
*/
init = 0;
CRYPTO_THREAD_unlock(err_string_lock);
/* openssl_strerror_r could change errno, but we want to preserve it */
set_sys_error(saveerrno);
err_load_strings(SYS_str_reasons);
}
#endif
#define err_clear_data(p, i) \
do { \
if ((p)->err_data_flags[i] & ERR_TXT_MALLOCED) {\
OPENSSL_free((p)->err_data[i]); \
(p)->err_data[i] = NULL; \
} \
(p)->err_data_flags[i] = 0; \
} while (0)
#define err_clear(p, i) \
do { \
err_clear_data(p, i); \
(p)->err_flags[i] = 0; \
(p)->err_buffer[i] = 0; \
(p)->err_file[i] = NULL; \
(p)->err_line[i] = -1; \
} while (0)
static void ERR_STATE_free(ERR_STATE *s)
{
int i;
if (s == NULL)
return;
for (i = 0; i < ERR_NUM_ERRORS; i++) {
err_clear_data(s, i);
}
OPENSSL_free(s);
}
DEFINE_RUN_ONCE_STATIC(do_err_strings_init)
{
if (!OPENSSL_init_crypto(0, NULL))
return 0;
err_string_lock = CRYPTO_THREAD_lock_new();
if (err_string_lock == NULL)
return 0;
int_error_hash = lh_ERR_STRING_DATA_new(err_string_data_hash,
err_string_data_cmp);
if (int_error_hash == NULL) {
CRYPTO_THREAD_lock_free(err_string_lock);
err_string_lock = NULL;
return 0;
}
return 1;
}
void err_cleanup(void)
{
if (set_err_thread_local != 0)
CRYPTO_THREAD_cleanup_local(&err_thread_local);
CRYPTO_THREAD_lock_free(err_string_lock);
err_string_lock = NULL;
lh_ERR_STRING_DATA_free(int_error_hash);
int_error_hash = NULL;
}
/*
* Legacy; pack in the library.
*/
static void err_patch(int lib, ERR_STRING_DATA *str)
{
unsigned long plib = ERR_PACK(lib, 0, 0);
for (; str->error != 0; str++)
str->error |= plib;
}
/*
* Hash in |str| error strings. Assumes the URN_ONCE was done.
*/
static int err_load_strings(const ERR_STRING_DATA *str)
{
CRYPTO_THREAD_write_lock(err_string_lock);
for (; str->error; str++)
(void)lh_ERR_STRING_DATA_insert(int_error_hash,
(ERR_STRING_DATA *)str);
CRYPTO_THREAD_unlock(err_string_lock);
return 1;
}
int ERR_load_ERR_strings(void)
{
#ifndef OPENSSL_NO_ERR
if (!RUN_ONCE(&err_string_init, do_err_strings_init))
return 0;
err_load_strings(ERR_str_libraries);
err_load_strings(ERR_str_reasons);
err_patch(ERR_LIB_SYS, ERR_str_functs);
err_load_strings(ERR_str_functs);
build_SYS_str_reasons();
#endif
return 1;
}
int ERR_load_strings(int lib, ERR_STRING_DATA *str)
{
if (ERR_load_ERR_strings() == 0)
return 0;
err_patch(lib, str);
err_load_strings(str);
return 1;
}
int ERR_load_strings_const(const ERR_STRING_DATA *str)
{
if (ERR_load_ERR_strings() == 0)
return 0;
err_load_strings(str);
return 1;
}
int ERR_unload_strings(int lib, ERR_STRING_DATA *str)
{
if (!RUN_ONCE(&err_string_init, do_err_strings_init))
return 0;
CRYPTO_THREAD_write_lock(err_string_lock);
/*
* We don't need to ERR_PACK the lib, since that was done (to
* the table) when it was loaded.
*/
for (; str->error; str++)
(void)lh_ERR_STRING_DATA_delete(int_error_hash, str);
CRYPTO_THREAD_unlock(err_string_lock);
return 1;
}
void err_free_strings_int(void)
{
if (!RUN_ONCE(&err_string_init, do_err_strings_init))
return;
}
/********************************************************/
void ERR_put_error(int lib, int func, int reason, const char *file, int line)
{
ERR_STATE *es;
#ifdef _OSD_POSIX
/*
* In the BS2000-OSD POSIX subsystem, the compiler generates path names
* in the form "*POSIX(/etc/passwd)". This dirty hack strips them to
* something sensible. @@@ We shouldn't modify a const string, though.
*/
if (strncmp(file, "*POSIX(", sizeof("*POSIX(") - 1) == 0) {
char *end;
/* Skip the "*POSIX(" prefix */
file += sizeof("*POSIX(") - 1;
end = &file[strlen(file) - 1];
if (*end == ')')
*end = '\0';
/* Optional: use the basename of the path only. */
if ((end = strrchr(file, '/')) != NULL)
file = &end[1];
}
#endif
es = ERR_get_state();
if (es == NULL)
return;
es->top = (es->top + 1) % ERR_NUM_ERRORS;
if (es->top == es->bottom)
es->bottom = (es->bottom + 1) % ERR_NUM_ERRORS;
es->err_flags[es->top] = 0;
es->err_buffer[es->top] = ERR_PACK(lib, func, reason);
es->err_file[es->top] = file;
es->err_line[es->top] = line;
err_clear_data(es, es->top);
}
void ERR_clear_error(void)
{
int i;
ERR_STATE *es;
es = ERR_get_state();
if (es == NULL)
return;
for (i = 0; i < ERR_NUM_ERRORS; i++) {
err_clear(es, i);
}
es->top = es->bottom = 0;
}
unsigned long ERR_get_error(void)
{
return get_error_values(1, 0, NULL, NULL, NULL, NULL);
}
unsigned long ERR_get_error_line(const char **file, int *line)
{
return get_error_values(1, 0, file, line, NULL, NULL);
}
unsigned long ERR_get_error_line_data(const char **file, int *line,
const char **data, int *flags)
{
return get_error_values(1, 0, file, line, data, flags);
}
unsigned long ERR_peek_error(void)
{
return get_error_values(0, 0, NULL, NULL, NULL, NULL);
}
unsigned long ERR_peek_error_line(const char **file, int *line)
{
return get_error_values(0, 0, file, line, NULL, NULL);
}
unsigned long ERR_peek_error_line_data(const char **file, int *line,
const char **data, int *flags)
{
return get_error_values(0, 0, file, line, data, flags);
}
unsigned long ERR_peek_last_error(void)
{
return get_error_values(0, 1, NULL, NULL, NULL, NULL);
}
unsigned long ERR_peek_last_error_line(const char **file, int *line)
{
return get_error_values(0, 1, file, line, NULL, NULL);
}
unsigned long ERR_peek_last_error_line_data(const char **file, int *line,
const char **data, int *flags)
{
return get_error_values(0, 1, file, line, data, flags);
}
static unsigned long get_error_values(int inc, int top, const char **file,
int *line, const char **data,
int *flags)
{
int i = 0;
ERR_STATE *es;
unsigned long ret;
es = ERR_get_state();
if (es == NULL)
return 0;
if (inc && top) {
if (file)
*file = "";
if (line)
*line = 0;
if (data)
*data = "";
if (flags)
*flags = 0;
return ERR_R_INTERNAL_ERROR;
}
if (es->bottom == es->top)
return 0;
if (top)
i = es->top; /* last error */
else
i = (es->bottom + 1) % ERR_NUM_ERRORS; /* first error */
ret = es->err_buffer[i];
if (inc) {
es->bottom = i;
es->err_buffer[i] = 0;
}
if (file != NULL && line != NULL) {
if (es->err_file[i] == NULL) {
*file = "NA";
*line = 0;
} else {
*file = es->err_file[i];
*line = es->err_line[i];
}
}
if (data == NULL) {
if (inc) {
err_clear_data(es, i);
}
} else {
if (es->err_data[i] == NULL) {
*data = "";
if (flags != NULL)
*flags = 0;
} else {
*data = es->err_data[i];
if (flags != NULL)
*flags = es->err_data_flags[i];
}
}
return ret;
}
void ERR_error_string_n(unsigned long e, char *buf, size_t len)
{
char lsbuf[64], fsbuf[64], rsbuf[64];
const char *ls, *fs, *rs;
unsigned long l, f, r;
if (len == 0)
return;
l = ERR_GET_LIB(e);
ls = ERR_lib_error_string(e);
if (ls == NULL) {
BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
ls = lsbuf;
}
fs = ERR_func_error_string(e);
f = ERR_GET_FUNC(e);
if (fs == NULL) {
BIO_snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);
fs = fsbuf;
}
rs = ERR_reason_error_string(e);
r = ERR_GET_REASON(e);
if (rs == NULL) {
BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);
rs = rsbuf;
}
BIO_snprintf(buf, len, "error:%08lX:%s:%s:%s", e, ls, fs, rs);
if (strlen(buf) == len - 1) {
/* Didn't fit; use a minimal format. */
BIO_snprintf(buf, len, "err:%lx:%lx:%lx:%lx", e, l, f, r);
}
}
/*
* ERR_error_string_n should be used instead for ret != NULL as
* ERR_error_string cannot know how large the buffer is
*/
char *ERR_error_string(unsigned long e, char *ret)
{
static char buf[256];
if (ret == NULL)
ret = buf;
ERR_error_string_n(e, ret, (int)sizeof(buf));
return ret;
}
const char *ERR_lib_error_string(unsigned long e)
{
ERR_STRING_DATA d, *p;
unsigned long l;
if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
return NULL;
}
l = ERR_GET_LIB(e);
d.error = ERR_PACK(l, 0, 0);
p = int_err_get_item(&d);
return ((p == NULL) ? NULL : p->string);
}
const char *ERR_func_error_string(unsigned long e)
{
ERR_STRING_DATA d, *p;
unsigned long l, f;
if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
return NULL;
}
l = ERR_GET_LIB(e);
f = ERR_GET_FUNC(e);
d.error = ERR_PACK(l, f, 0);
p = int_err_get_item(&d);
return ((p == NULL) ? NULL : p->string);
}
const char *ERR_reason_error_string(unsigned long e)
{
ERR_STRING_DATA d, *p = NULL;
unsigned long l, r;
if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
return NULL;
}
l = ERR_GET_LIB(e);
r = ERR_GET_REASON(e);
d.error = ERR_PACK(l, 0, r);
p = int_err_get_item(&d);
if (!p) {
d.error = ERR_PACK(0, 0, r);
p = int_err_get_item(&d);
}
return ((p == NULL) ? NULL : p->string);
}
void err_delete_thread_state(void)
{
ERR_STATE *state = CRYPTO_THREAD_get_local(&err_thread_local);
if (state == NULL)
return;
CRYPTO_THREAD_set_local(&err_thread_local, NULL);
ERR_STATE_free(state);
}
#if OPENSSL_API_COMPAT < 0x10100000L
void ERR_remove_thread_state(void *dummy)
{
}
#endif
#if OPENSSL_API_COMPAT < 0x10000000L
void ERR_remove_state(unsigned long pid)
{
}
#endif
DEFINE_RUN_ONCE_STATIC(err_do_init)
{
set_err_thread_local = 1;
return CRYPTO_THREAD_init_local(&err_thread_local, NULL);
}
ERR_STATE *ERR_get_state(void)
{
ERR_STATE *state;
int saveerrno = get_last_sys_error();
if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY, NULL))
return NULL;
if (!RUN_ONCE(&err_init, err_do_init))
return NULL;
state = CRYPTO_THREAD_get_local(&err_thread_local);
if (state == (ERR_STATE*)-1)
return NULL;
if (state == NULL) {
if (!CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)-1))
return NULL;
if ((state = OPENSSL_zalloc(sizeof(*state))) == NULL) {
CRYPTO_THREAD_set_local(&err_thread_local, NULL);
return NULL;
}
if (!ossl_init_thread_start(OPENSSL_INIT_THREAD_ERR_STATE)
|| !CRYPTO_THREAD_set_local(&err_thread_local, state)) {
ERR_STATE_free(state);
CRYPTO_THREAD_set_local(&err_thread_local, NULL);
return NULL;
}
/* Ignore failures from these */
OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
}
set_sys_error(saveerrno);
return state;
}
/*
* err_shelve_state returns the current thread local error state
* and freezes the error module until err_unshelve_state is called.
*/
int err_shelve_state(void **state)
{
int saveerrno = get_last_sys_error();
if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY, NULL))
return 0;
if (!RUN_ONCE(&err_init, err_do_init))
return 0;
*state = CRYPTO_THREAD_get_local(&err_thread_local);
if (!CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)-1))
return 0;
set_sys_error(saveerrno);
return 1;
}
/*
* err_unshelve_state restores the error state that was returned
* by err_shelve_state previously.
*/
void err_unshelve_state(void* state)
{
if (state != (void*)-1)
CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)state);
}
int ERR_get_next_error_library(void)
{
int ret;
if (!RUN_ONCE(&err_string_init, do_err_strings_init))
return 0;
CRYPTO_THREAD_write_lock(err_string_lock);
ret = int_err_library_number++;
CRYPTO_THREAD_unlock(err_string_lock);
return ret;
}
void ERR_set_error_data(char *data, int flags)
{
ERR_STATE *es;
int i;
es = ERR_get_state();
if (es == NULL)
return;
i = es->top;
err_clear_data(es, i);
es->err_data[i] = data;
es->err_data_flags[i] = flags;
}
void ERR_add_error_data(int num, ...)
{
va_list args;
va_start(args, num);
ERR_add_error_vdata(num, args);
va_end(args);
}
void ERR_add_error_vdata(int num, va_list args)
{
int i, n, s;
char *str, *p, *a;
s = 80;
if ((str = OPENSSL_malloc(s + 1)) == NULL) {
/* ERRerr(ERR_F_ERR_ADD_ERROR_VDATA, ERR_R_MALLOC_FAILURE); */
return;
}
str[0] = '\0';
n = 0;
for (i = 0; i < num; i++) {
a = va_arg(args, char *);
if (a == NULL)
a = "<NULL>";
n += strlen(a);
if (n > s) {
s = n + 20;
p = OPENSSL_realloc(str, s + 1);
if (p == NULL) {
OPENSSL_free(str);
return;
}
str = p;
}
OPENSSL_strlcat(str, a, (size_t)s + 1);
}
ERR_set_error_data(str, ERR_TXT_MALLOCED | ERR_TXT_STRING);
}
int ERR_set_mark(void)
{
ERR_STATE *es;
es = ERR_get_state();
if (es == NULL)
return 0;
if (es->bottom == es->top)
return 0;
es->err_flags[es->top] |= ERR_FLAG_MARK;
return 1;
}
int ERR_pop_to_mark(void)
{
ERR_STATE *es;
es = ERR_get_state();
if (es == NULL)
return 0;
while (es->bottom != es->top
&& (es->err_flags[es->top] & ERR_FLAG_MARK) == 0) {
err_clear(es, es->top);
es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1;
}
if (es->bottom == es->top)
return 0;
es->err_flags[es->top] &= ~ERR_FLAG_MARK;
return 1;
}
int ERR_clear_last_mark(void)
{
ERR_STATE *es;
int top;
es = ERR_get_state();
if (es == NULL)
return 0;
top = es->top;
while (es->bottom != top
&& (es->err_flags[top] & ERR_FLAG_MARK) == 0) {
top = top > 0 ? top - 1 : ERR_NUM_ERRORS - 1;
}
if (es->bottom == top)
return 0;
es->err_flags[top] &= ~ERR_FLAG_MARK;
return 1;
}
#ifdef UINTPTR_T
# undef UINTPTR_T
#endif
/*
* uintptr_t is the answer, but unfortunately C89, current "least common
* denominator" doesn't define it. Most legacy platforms typedef it anyway,
* so that attempt to fill the gaps means that one would have to identify
* that track these gaps, which would be undesirable. Macro it is...
*/
#if defined(__VMS) && __INITIAL_POINTER_SIZE==64
/*
* But we can't use size_t on VMS, because it adheres to sizeof(size_t)==4
* even in 64-bit builds, which means that it won't work as mask.
*/
# define UINTPTR_T unsigned long long
#else
# define UINTPTR_T size_t
#endif
void err_clear_last_constant_time(int clear)
{
ERR_STATE *es;
int top;
es = ERR_get_state();
if (es == NULL)
return;
top = es->top;
es->err_flags[top] &= ~(0 - clear);
es->err_buffer[top] &= ~(0UL - clear);
es->err_file[top] = (const char *)((UINTPTR_T)es->err_file[top] &
~((UINTPTR_T)0 - clear));
es->err_line[top] |= 0 - clear;
es->top = (top + ERR_NUM_ERRORS - clear) % ERR_NUM_ERRORS;
}
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