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author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
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committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /openssl/doc/crypto/RAND_load_file.pod | |
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Diffstat (limited to 'openssl/doc/crypto/RAND_load_file.pod')
-rw-r--r-- | openssl/doc/crypto/RAND_load_file.pod | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/openssl/doc/crypto/RAND_load_file.pod b/openssl/doc/crypto/RAND_load_file.pod new file mode 100644 index 000000000..d8c134e62 --- /dev/null +++ b/openssl/doc/crypto/RAND_load_file.pod @@ -0,0 +1,53 @@ +=pod + +=head1 NAME + +RAND_load_file, RAND_write_file, RAND_file_name - PRNG seed file + +=head1 SYNOPSIS + + #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); + +=head1 DESCRIPTION + +RAND_file_name() generates a default path for the random seed +file. B<buf> points to a buffer of size B<num> in which to store the +filename. The seed file is $RANDFILE if that environment variable is +set, $HOME/.rnd otherwise. If $HOME is not set either, or B<num> is +too small for the path name, an error occurs. + +RAND_load_file() reads a number of bytes from file B<filename> and +adds them to the PRNG. If B<max_bytes> is non-negative, +up to to B<max_bytes> are read; starting with OpenSSL 0.9.5, +if B<max_bytes> is -1, the complete file is read. + +RAND_write_file() writes a number of random bytes (currently 1024) to +file B<filename> which can be used to initialize the PRNG by calling +RAND_load_file() in a later session. + +=head1 RETURN VALUES + +RAND_load_file() returns the number of bytes read. + +RAND_write_file() returns the number of bytes written, and -1 if the +bytes written were generated without appropriate seed. + +RAND_file_name() returns a pointer to B<buf> on success, and NULL on +error. + +=head1 SEE ALSO + +L<rand(3)|rand(3)>, L<RAND_add(3)|RAND_add(3)>, L<RAND_cleanup(3)|RAND_cleanup(3)> + +=head1 HISTORY + +RAND_load_file(), RAND_write_file() and RAND_file_name() are available in +all versions of SSLeay and OpenSSL. + +=cut |