2 * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 /* TODO: When ERR_STATE becomes opaque, this musts be removed */
11 #define OSSL_FORCE_ERR_STATE
14 #include "internal/cryptlib.h"
15 #include <openssl/crypto.h>
16 #include <openssl/buffer.h>
17 #include <openssl/err.h>
18 #include "err_local.h"
20 #define ERR_PRINT_BUF_SIZE 4096
21 void ERR_print_errors_cb(int (*cb) (const char *str, size_t len, void *u),
24 CRYPTO_THREAD_ID tid = CRYPTO_THREAD_get_current_id();
26 char buf[ERR_PRINT_BUF_SIZE], *hex;
27 const char *lib, *reason;
28 const char *file, *data, *func;
31 while ((l = ERR_get_error_all(&file, &line, &func, &data, &flags)) != 0) {
32 lib = ERR_lib_error_string(l);
33 reason = ERR_reason_error_string(l);
35 func = "unknown function";
36 if ((flags & ERR_TXT_STRING) == 0)
38 hex = OPENSSL_buf2hexstr((const unsigned char *)&tid, sizeof(tid));
39 BIO_snprintf(buf, sizeof(buf), "%s:error:%s:%s:%s:%s:%d:%s\n",
40 hex == NULL ? "<null>" : hex, lib, func, reason, file,
43 if (cb(buf, strlen(buf), u) <= 0)
44 break; /* abort outputting the error report */
48 /* auxiliary function for incrementally reporting texts via the error queue */
49 static void put_error(int lib, const char *func, int reason,
50 const char *file, int line)
53 ERR_set_debug(file, line, func);
54 ERR_set_error(lib, reason, NULL /* no data here, so fmt is NULL */);
57 #define TYPICAL_MAX_OUTPUT_BEFORE_DATA 100
58 #define MAX_DATA_LEN (ERR_PRINT_BUF_SIZE - TYPICAL_MAX_OUTPUT_BEFORE_DATA)
59 void ERR_add_error_txt(const char *separator, const char *txt)
61 const char *file = NULL;
63 const char *func = NULL;
64 const char *data = NULL;
66 unsigned long err = ERR_peek_last_error();
68 if (separator == NULL)
71 put_error(ERR_LIB_NONE, NULL, 0, "", 0);
74 size_t available_len, data_len;
75 const char *curr = txt, *next = txt;
76 const char *leading_separator = separator;
77 int trailing_separator = 0;
80 ERR_peek_last_error_all(&file, &line, &func, &data, &flags);
81 if ((flags & ERR_TXT_STRING) == 0) {
83 leading_separator = "";
85 data_len = strlen(data);
87 /* workaround for limit of ERR_print_errors_cb() */
88 if (data_len >= MAX_DATA_LEN
89 || strlen(separator) >= (size_t)(MAX_DATA_LEN - data_len))
92 available_len = MAX_DATA_LEN - data_len - strlen(separator) - 1;
93 /* MAX_DATA_LEN > available_len >= 0 */
95 if (*separator == '\0') {
96 const size_t len_next = strlen(next);
98 if (len_next <= available_len) {
100 curr = NULL; /* no need to split */
102 next += available_len;
103 curr = next; /* will split at this point */
106 while (*next != '\0' && (size_t)(next - txt) <= available_len) {
108 next = strstr(curr, separator);
110 next += strlen(separator);
111 trailing_separator = *next == '\0';
113 next = curr + strlen(curr);
116 if ((size_t)(next - txt) <= available_len)
117 curr = NULL; /* the above loop implies *next == '\0' */
120 /* split error msg at curr since error data would get too long */
122 tmp = OPENSSL_strndup(txt, curr - txt);
125 ERR_add_error_data(2, separator, tmp);
128 put_error(ERR_GET_LIB(err), func, err, file, line);
131 if (trailing_separator) {
132 tmp = OPENSSL_strndup(txt, next - strlen(separator) - txt);
135 /* output txt without the trailing separator */
136 ERR_add_error_data(2, leading_separator, tmp);
139 ERR_add_error_data(2, leading_separator, txt);
141 txt = next; /* finished */
143 } while (*txt != '\0');
146 void ERR_add_error_mem_bio(const char *separator, BIO *bio)
150 long len = BIO_get_mem_data(bio, &str);
153 if (str[len - 1] != '\0') {
154 if (BIO_write(bio, "", 1) <= 0)
157 len = BIO_get_mem_data(bio, &str);
160 ERR_add_error_txt(separator, str);
165 static int print_bio(const char *str, size_t len, void *bp)
167 return BIO_write((BIO *)bp, str, len);
170 void ERR_print_errors(BIO *bp)
172 ERR_print_errors_cb(print_bio, bp);
175 #ifndef OPENSSL_NO_STDIO
176 void ERR_print_errors_fp(FILE *fp)
178 BIO *bio = BIO_new_fp(fp, BIO_NOCLOSE);
182 ERR_print_errors_cb(print_bio, bio);