ERR_PUT_ERROR(3ossl) OpenSSL ERR_PUT_ERROR(3ossl)
NAME
ERR_raise, ERR_raise_data, ERR_put_error, ERR_add_error_data,
ERR_add_error_vdata, ERR_add_error_txt, ERR_add_error_mem_bio - record
an error
SYNOPSIS
#include <openssl/err.h>
void ERR_raise(int lib, int reason);
void ERR_raise_data(int lib, int reason, const char *fmt, ...);
void ERR_add_error_data(int num, ...);
void ERR_add_error_vdata(int num, va_list arg);
void ERR_add_error_txt(const char *sep, const char *txt);
void ERR_add_error_mem_bio(const char *sep, BIO *bio);
The following function has been deprecated since OpenSSL 3.0, and can
be hidden entirely by defining OPENSSL_API_COMPAT with a suitable
version value, see openssl_user_macros(7):
void ERR_put_error(int lib, int func, int reason, const char *file, int line);
DESCRIPTION
ERR_raise() adds a new error to the thread's error queue. The error
occurred in the library lib for the reason given by the reason code.
Furthermore, the name of the file, the line, and name of the function
where the error occurred is saved with the error record.
ERR_raise_data() does the same thing as ERR_raise(), but also lets the
caller specify additional information as a format string fmt and an
arbitrary number of values, which are processed with BIO_snprintf(3).
ERR_put_error(3) adds an error code to the thread's error queue. It
signals that the error of reason code reason occurred in function func
of library lib, in line number line of file. This function is usually
called by a macro.
ERR_add_error_data() associates the concatenation of its num string
arguments as additional data with the error code added last.
ERR_add_error_vdata() is similar except the argument is a va_list.
Multiple calls to these functions append to the current top of the
error queue. The total length of the string data per error is limited
to 4096 characters.
ERR_add_error_txt() appends the given text string as additional data to
the last error queue entry, after inserting the optional separator
string if it is not NULL and the top error entry does not yet have
additional data. In case the separator is at the end of the text it is
not appended to the data. The sep argument may be for instance "\n" to
insert a line break when needed. If the associated data would become
more than 4096 characters long (which is the limit given above) it is
split over sufficiently many new copies of the last error queue entry.
ERR_add_error_mem_bio() is the same as ERR_add_error_txt() except that
the text string is taken from the given memory BIO. It appends '\0' to
the BIO contents if not already NUL-terminated.
ERR_load_strings(3) can be used to register error strings so that the
application can a generate human-readable error messages for the error
code.
Reporting errors
OpenSSL library reports
Each OpenSSL sub-library has library code ERR_LIB_XXX and has its own
set of reason codes XXX_R_.... These are both passed in combination to
ERR_raise() and ERR_raise_data(), and the combination ultimately
produces the correct error text for the reported error.
All these macros and the numbers they have as values are specific to
OpenSSL's libraries. OpenSSL reason codes normally consist of textual
error descriptions. For example, the function ssl3_read_bytes() reports
a "handshake failure" as follows:
ERR_raise(ERR_LIB_SSL, SSL_R_SSL_HANDSHAKE_FAILURE);
There are two exceptions:
ERR_LIB_SYS
This "library code" indicates that a system error is being
reported. In this case, the reason code given to ERR_raise() and
ERR_raise_data() must be errno(3).
ERR_raise(ERR_LIB_SYS, errno);
ERR_R_XXX
This set of error codes is considered global, and may be used in
combination with any sub-library code.
ERR_raise(ERR_LIB_RSA, ERR_R_PASSED_INVALID_ARGUMENT);
Other pieces of software
Other pieces of software that may want to use OpenSSL's error reporting
system, such as engines or applications, must normally get their own
numbers.
o To get a "library" code, call ERR_get_next_error_library(3); this
gives the calling code a dynamic number, usable for the duration of
the process.
o Reason codes for each such "library" are determined or generated by
the authors of that code. They must be numbers in the range 1 to
524287 (in other words, they must be nonzero unsigned 18 bit
integers).
The exceptions mentioned in "OpenSSL library reports" above are valid
for other pieces of software, i.e. they may use ERR_LIB_SYS to report
system errors:
ERR_raise(ERR_LIB_SYS, errno);
... and they may use ERR_R_XXX macros together with their own "library"
code.
int app_lib_code = ERR_get_next_error_library();
/* ... */
ERR_raise(app_lib_code, ERR_R_PASSED_INVALID_ARGUMENT);
RETURN VALUES
ERR_put_error(3), ERR_add_error_data(),
ERR_add_error_vdata() ERR_add_error_txt(), and ERR_add_error_mem_bio()
return no values.
NOTES
ERR_put_error(3) are implemented as macros.
SEE ALSO
ERR_load_strings(3), ERR_get_next_error_library(3)
HISTORY
ERR_raise, ERR_raise_data, ERR_add_error_txt() and
ERR_add_error_mem_bio() were added in OpenSSL 3.0.
COPYRIGHT
Copyright 2000-2020 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>.
3.3.2 2024-09-04 ERR_PUT_ERROR(3ossl)
openssl 3.3.2 - Generated Tue Sep 10 15:15:35 CDT 2024