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/*
* Copyright 1995-2025 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
*/
#define OSSL_FORCE_ERR_STATE
#include <stdio.h>
#include "internal/cryptlib.h"
#include <openssl/crypto.h>
#include <openssl/buffer.h>
#include <openssl/err.h>
#include "err_local.h"
#define ERR_PRINT_BUF_SIZE 4096
void ERR_print_errors_cb(int (*cb) (const char *str, size_t len, void *u),
void *u)
{
CRYPTO_THREAD_ID tid = CRYPTO_THREAD_get_current_id();
unsigned long l;
const char *file, *data, *func;
int line, flags;
while ((l = ERR_get_error_all(&file, &line, &func, &data, &flags)) != 0) {
char buf[ERR_PRINT_BUF_SIZE] = "";
char *hex = NULL;
int offset;
if ((flags & ERR_TXT_STRING) == 0)
data = "";
hex = ossl_buf2hexstr_sep((const unsigned char *)&tid, sizeof(tid), '\0');
BIO_snprintf(buf, sizeof(buf), "%s:", hex == NULL ? "<null>" : hex);
offset = (int)strlen(buf);
ossl_err_string_int(l, func, buf + offset, sizeof(buf) - offset);
offset += (int)strlen(buf + offset);
BIO_snprintf(buf + offset, sizeof(buf) - offset, ":%s:%d:%s\n",
file, line, data);
OPENSSL_free(hex);
if (cb(buf, strlen(buf), u) <= 0)
break; /* abort outputting the error report */
}
}
/* auxiliary function for incrementally reporting texts via the error queue */
static void put_error(int lib, const char *func, int reason,
const char *file, int line)
{
ERR_new();
ERR_set_debug(file, line, func);
ERR_set_error(lib, reason, NULL /* no data here, so fmt is NULL */);
}
#define TYPICAL_MAX_OUTPUT_BEFORE_DATA 100
#define MAX_DATA_LEN (ERR_PRINT_BUF_SIZE - TYPICAL_MAX_OUTPUT_BEFORE_DATA)
void ERR_add_error_txt(const char *separator, const char *txt)
{
const char *file = NULL;
int line;
const char *func = NULL;
const char *data = NULL;
int flags;
unsigned long err = ERR_peek_last_error();
if (separator == NULL)
separator = "";
if (err == 0)
put_error(ERR_LIB_NONE, NULL, 0, "", 0);
do {
size_t available_len, data_len;
const char *curr = txt, *next = txt;
const char *leading_separator = separator;
int trailing_separator = 0;
char *tmp;
ERR_peek_last_error_all(&file, &line, &func, &data, &flags);
if ((flags & ERR_TXT_STRING) == 0) {
data = "";
leading_separator = "";
}
data_len = strlen(data);
/* workaround for limit of ERR_print_errors_cb() */
if (data_len >= MAX_DATA_LEN
|| strlen(separator) >= (size_t)(MAX_DATA_LEN - data_len))
available_len = 0;
else
available_len = MAX_DATA_LEN - data_len - strlen(separator) - 1;
/* MAX_DATA_LEN > available_len >= 0 */
if (*separator == '\0') {
const size_t len_next = strlen(next);
if (len_next <= available_len) {
next += len_next;
curr = NULL; /* no need to split */
} else {
next += available_len;
curr = next; /* will split at this point */
}
} else {
while (*next != '\0' && (size_t)(next - txt) <= available_len) {
curr = next;
next = strstr(curr, separator);
if (next != NULL) {
next += strlen(separator);
trailing_separator = *next == '\0';
} else {
next = curr + strlen(curr);
}
}
if ((size_t)(next - txt) <= available_len)
curr = NULL; /* the above loop implies *next == '\0' */
}
if (curr != NULL) {
/* split error msg at curr since error data would get too long */
if (curr != txt) {
tmp = OPENSSL_strndup(txt, curr - txt);
if (tmp == NULL)
return;
ERR_add_error_data(2, separator, tmp);
OPENSSL_free(tmp);
}
put_error(ERR_GET_LIB(err), func, err, file, line);
txt = curr;
} else {
if (trailing_separator) {
tmp = OPENSSL_strndup(txt, next - strlen(separator) - txt);
if (tmp == NULL)
return;
/* output txt without the trailing separator */
ERR_add_error_data(2, leading_separator, tmp);
OPENSSL_free(tmp);
} else {
ERR_add_error_data(2, leading_separator, txt);
}
txt = next; /* finished */
}
} while (*txt != '\0');
}
void ERR_add_error_mem_bio(const char *separator, BIO *bio)
{
if (bio != NULL) {
char *str;
long len = BIO_get_mem_data(bio, &str);
if (len > 0) {
if (str[len - 1] != '\0') {
if (BIO_write(bio, "", 1) <= 0)
return;
len = BIO_get_mem_data(bio, &str);
}
if (len > 1)
ERR_add_error_txt(separator, str);
}
}
}
static int print_bio(const char *str, size_t len, void *bp)
{
return BIO_write((BIO *)bp, str, (int)len);
}
void ERR_print_errors(BIO *bp)
{
ERR_print_errors_cb(print_bio, bp);
}
#ifndef OPENSSL_NO_STDIO
void ERR_print_errors_fp(FILE *fp)
{
BIO *bio = BIO_new_fp(fp, BIO_NOCLOSE);
if (bio == NULL)
return;
ERR_print_errors_cb(print_bio, bio);
BIO_free(bio);
}
#endif
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