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.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35) .\" .\" Standard preamble: .\" ======================================================================== .de Sp \" Vertical space (when we can't use .PP) .if t .sp .5v .if n .sp .. .de Vb \" Begin verbatim text .ft CW .nf .ne \\$1 .. .de Ve \" End verbatim text .ft R .fi .. .\" Set up some character translations and predefined strings. \*(-- will .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left .\" double quote, and \*(R" will give a right double quote. \*(C+ will .\" give a nicer C++. Capital omega is used to do unbreakable dashes and .\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, .\" nothing in troff, for use with C<>. .tr \(*W- .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' .ie n \{\ . ds -- \(*W- . ds PI pi . if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch . if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch . ds L" "" . ds R" "" . ds C` "" . ds C' "" 'br\} .el\{\ . ds -- \|\(em\| . ds PI \(*p . ds L" `` . ds R" '' . ds C` . ds C' 'br\} .\" .\" Escape single quotes in literal strings from groff's Unicode transform. .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" .\" If the F register is >0, we'll generate index entries on stderr for .\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index .\" entries marked with X<> in POD. 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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" \&\fBRAND_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 \&\fBRAND_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 \&\fBRAND_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 \&\fBRAND_load_file()\fR in a later session. .SH "RETURN VALUES" .IX Header "RETURN VALUES" \&\fBRAND_load_file()\fR returns the number of bytes read. .PP \&\fBRAND_write_file()\fR returns the number of bytes written, and \-1 if the bytes written were generated without appropriate seed. .PP \&\fBRAND_file_name()\fR returns a pointer to \fBbuf\fR on success, and \s-1NULL\s0 on error. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBrand\fR\|(3), \fBRAND_add\fR\|(3), \fBRAND_cleanup\fR\|(3) .SH "HISTORY" .IX Header "HISTORY" \&\fBRAND_load_file()\fR, \fBRAND_write_file()\fR and \fBRAND_file_name()\fR are available in all versions of SSLeay and OpenSSL.