| Current File : //usr/man/man3openssl/RAND_load_file.3openssl |
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.\" ========================================================================
.\"
.IX Title "RAND_load_file 3openssl"
.TH RAND_load_file 3openssl "2016-05-03" "1.0.1t" "OpenSSL"
.\" For nroff, turn off justification. Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
RAND_load_file, RAND_write_file, RAND_file_name \- PRNG seed file
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #include <openssl/rand.h>
\&
\& const char *RAND_file_name(char *buf, size_t num);
\&
\& int RAND_load_file(const char *filename, long max_bytes);
\&
\& int RAND_write_file(const char *filename);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
\&\fIRAND_file_name()\fR generates a default path for the random seed
file. \fBbuf\fR points to a buffer of size \fBnum\fR in which to store the
filename. The seed file is \f(CW$RANDFILE\fR if that environment variable is
set, \f(CW$HOME\fR/.rnd otherwise. If \f(CW$HOME\fR is not set either, or \fBnum\fR is
too small for the path name, an error occurs.
.PP
\&\fIRAND_load_file()\fR reads a number of bytes from file \fBfilename\fR and
adds them to the \s-1PRNG\s0. If \fBmax_bytes\fR is non-negative,
up to to \fBmax_bytes\fR are read; starting with OpenSSL 0.9.5,
if \fBmax_bytes\fR is \-1, the complete file is read.
.PP
\&\fIRAND_write_file()\fR writes a number of random bytes (currently 1024) to
file \fBfilename\fR which can be used to initialize the \s-1PRNG\s0 by calling
\&\fIRAND_load_file()\fR in a later session.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
\&\fIRAND_load_file()\fR returns the number of bytes read.
.PP
\&\fIRAND_write_file()\fR returns the number of bytes written, and \-1 if the
bytes written were generated without appropriate seed.
.PP
\&\fIRAND_file_name()\fR returns a pointer to \fBbuf\fR on success, and \s-1NULL\s0 on
error.
.\" Oracle has added the ARC stability level to this manual page
.SH ATTRIBUTES
See
.BR attributes (5)
for descriptions of the following attributes:
.sp
.TS
box;
cbp-1 | cbp-1
l | l .
ATTRIBUTE TYPE ATTRIBUTE VALUE
=
Availability library/security/openssl
=
Stability Uncommitted
.TE
.PP
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIrand\fR\|(3), \fIRAND_add\fR\|(3), \fIRAND_cleanup\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\fIRAND_load_file()\fR, \fIRAND_write_file()\fR and \fIRAND_file_name()\fR are available in
all versions of SSLeay and OpenSSL.
.SH NOTES
.\" Oracle has added source availability information to this manual page
This software was built from source available at https://java.net/projects/solaris-userland. The original community source was downloaded from http://www.openssl.org/source/openssl-1.0.1t.tar.gz
Further information about this software can be found on the open source community website at http://www.openssl.org/.