mirror of
https://github.com/libssh2/libssh2.git
synced 2025-11-03 22:13:11 +03:00
592e2b37fa
- simplify `.TH` headers. - delete empty lines before sections. - update template with an `AVAILABILITY` section. Left libssh2 version number in the `.TH` header for entries without an `AVAILABILITY` section, or where there was a different version number there.
78 lines
2.7 KiB
Groff
78 lines
2.7 KiB
Groff
.TH libssh2_session_supported_algs 3 "23 Oct 2011" "libssh2" "libssh2"
|
|
.SH NAME
|
|
libssh2_session_supported_algs - get list of supported algorithms
|
|
.SH SYNOPSIS
|
|
.nf
|
|
#include <libssh2.h>
|
|
|
|
int
|
|
libssh2_session_supported_algs(LIBSSH2_SESSION* session,
|
|
int method_type,
|
|
const char*** algs);
|
|
.fi
|
|
.SH DESCRIPTION
|
|
\fIsession\fP - An instance of initialized LIBSSH2_SESSION (the function will
|
|
use its pointer to the memory allocation function). \fImethod_type\fP -
|
|
Method type. See \fIlibssh2_session_method_pref(3)\fP. \fIalgs\fP - Address
|
|
of a pointer that will point to an array of returned algorithms
|
|
|
|
Get a list of supported algorithms for the given \fImethod_type\fP. The
|
|
method_type parameter is equivalent to method_type in
|
|
\fIlibssh2_session_method_pref(3)\fP. If successful, the function will
|
|
allocate the appropriate amount of memory. When not needed anymore, it must be
|
|
deallocated by calling \fIlibssh2_free(3)\fP. When this function is
|
|
unsuccessful, this must not be done.
|
|
|
|
In order to get a list of all supported compression algorithms,
|
|
libssh2_session_flag(session, LIBSSH2_FLAG_COMPRESS, 1) must be called before
|
|
calling this function, otherwise only "none" will be returned.
|
|
|
|
If successful, the function will allocate and fill the array with supported
|
|
algorithms (the same names as defined in RFC 4253). The array is not NULL
|
|
terminated.
|
|
.SH EXAMPLE
|
|
.nf
|
|
#include "libssh2.h"
|
|
|
|
const char **algorithms;
|
|
int rc, i;
|
|
LIBSSH2_SESSION *session;
|
|
|
|
/* initialize session */
|
|
session = libssh2_session_init();
|
|
rc = libssh2_session_supported_algs(session,
|
|
LIBSSH2_METHOD_CRYPT_CS,
|
|
&algorithms);
|
|
if(rc > 0) {
|
|
/* the call succeeded, do sth. with the list of algorithms
|
|
(e.g. list them)... */
|
|
printf("Supported symmetric algorithms:\\n");
|
|
for(i = 0; i < rc; i++)
|
|
printf("\\t%s\\n", algorithms[i]);
|
|
|
|
/* ... and free the allocated memory when not needed anymore */
|
|
libssh2_free(session, algorithms);
|
|
}
|
|
else {
|
|
/* call failed, error handling */
|
|
}
|
|
.fi
|
|
.SH RETURN VALUE
|
|
On success, a number of returned algorithms (i.e a positive number will be
|
|
returned). In case of a failure, an error code (a negative number, see below)
|
|
is returned. 0 should never be returned.
|
|
.SH ERRORS
|
|
\fILIBSSH2_ERROR_BAD_USE\fP - Invalid address of algs.
|
|
|
|
\fILIBSSH2_ERROR_METHOD_NOT_SUPPORTED\fP - Unknown method type.
|
|
|
|
\fILIBSSH2_ERROR_INVAL\fP - Internal error (normally should not occur).
|
|
|
|
\fILIBSSH2_ERROR_ALLOC\fP - Allocation of memory failed.
|
|
.SH AVAILABILITY
|
|
Added in 1.4.0
|
|
.SH SEE ALSO
|
|
.BR libssh2_session_methods(3),
|
|
.BR libssh2_session_method_pref(3)
|
|
.BR libssh2_free(3)
|