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a528d4f0a9
If something was "present in all versions" of SSLeay, or if it was added to a version of SSLeay (and therefore predates OpenSSL), remove mention of it. Documentation history now starts with OpenSSL. Remove mention of all history before OpenSSL 0.9.8, inclusive. Remove all AUTHOR sections. Reviewed-by: Tim Hudson <tjh@openssl.org>
49 lines
1.3 KiB
Plaintext
49 lines
1.3 KiB
Plaintext
=pod
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=head1 NAME
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RAND_load_file, RAND_write_file, RAND_file_name - PRNG seed file
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=head1 SYNOPSIS
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#include <openssl/rand.h>
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const char *RAND_file_name(char *buf, size_t num);
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int RAND_load_file(const char *filename, long max_bytes);
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int RAND_write_file(const char *filename);
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=head1 DESCRIPTION
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RAND_file_name() generates a default path for the random seed
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file. B<buf> points to a buffer of size B<num> in which to store the
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filename. The seed file is $RANDFILE if that environment variable is
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set, $HOME/.rnd otherwise. If $HOME is not set either, or B<num> is
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too small for the path name, an error occurs.
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RAND_load_file() reads a number of bytes from file B<filename> and
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adds them to the PRNG. If B<max_bytes> is non-negative,
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up to to B<max_bytes> are read;
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if B<max_bytes> is -1, the complete file is read.
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RAND_write_file() writes a number of random bytes (currently 1024) to
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file B<filename> which can be used to initialize the PRNG by calling
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RAND_load_file() in a later session.
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=head1 RETURN VALUES
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RAND_load_file() returns the number of bytes read.
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RAND_write_file() returns the number of bytes written, and -1 if the
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bytes written were generated without appropriate seed.
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RAND_file_name() returns a pointer to B<buf> on success, and NULL on
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error.
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=head1 SEE ALSO
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L<rand(3)>, L<RAND_add(3)>, L<RAND_cleanup(3)>
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=cut
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