diff options
author | Ulf Möller <ulf@openssl.org> | 2000-03-22 15:30:03 +0000 |
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committer | Ulf Möller <ulf@openssl.org> | 2000-03-22 15:30:03 +0000 |
commit | 513393f8d43b3f7984cd6c01bd8d877239f62d0e (patch) | |
tree | d75bfd77c1d8098f058b8dc63beec8f0ca9907b3 /doc | |
parent | e77066ea0a1a339a22bd5226eb08f139f67e96fe (diff) |
RAND_event()
Diffstat (limited to 'doc')
-rw-r--r-- | doc/crypto/RAND_add.pod | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/doc/crypto/RAND_add.pod b/doc/crypto/RAND_add.pod index 16a8698933..67c66f3e0c 100644 --- a/doc/crypto/RAND_add.pod +++ b/doc/crypto/RAND_add.pod @@ -2,7 +2,8 @@ =head1 NAME -RAND_add, RAND_seed, RAND_status, RAND_screen - add entropy to the PRNG +RAND_add, RAND_seed, RAND_status, RAND_event, RAND_screen - add +entropy to the PRNG =head1 SYNOPSIS @@ -14,6 +15,7 @@ RAND_add, RAND_seed, RAND_status, RAND_screen - add entropy to the PRNG int RAND_status(void); + int RAND_event(UINT iMsg, WPARAM wParam, LPARAM lParam); void RAND_screen(void); =head1 DESCRIPTION @@ -40,17 +42,24 @@ or L<RAND_load_file(3)|RAND_load_file(3)>. RAND_seed() is equivalent to RAND_add() when B<num == entropy>. +RAND_event() collects the entropy from Windows events such as mouse +movements and other user interaction. It should be called with the +B<iMsg>, B<wParam> and B<lParam> arguments of I<all> messages sent to +the window procedure. It will estimate the entropy contained in the +event message (if any), and add it to the PRNG. The program can then +process the messages as usual. + The RAND_screen() function is available for the convenience of Windows programmers. It adds the current contents of the screen to the PRNG. -For applications that can catch Windows events, seeding the PRNG with -the parameters of B<WM_MOUSEMOVE> events is a significantly better -source of randomness. It should be noted that both methods cannot be -used on servers that run without user interaction. +For applications that can catch Windows events, seeding the PRNG by +calling RAND_event() is a significantly better source of +randomness. It should be noted that both methods cannot be used on +servers that run without user interaction. =head1 RETURN VALUES -RAND_status() returns 1 if the PRNG has been seeded with enough data, -0 otherwise. +RAND_status() and RAND_event() return 1 if the PRNG has been seeded +with enough data, 0 otherwise. The other functions do not return values. @@ -63,6 +72,6 @@ L<RAND_load_file(3)|RAND_load_file(3)>, L<RAND_cleanup(3)|RAND_cleanup(3)> RAND_seed() and RAND_screen() are available in all versions of SSLeay and OpenSSL. RAND_add() and RAND_status() have been added in OpenSSL -0.9.5. +0.9.5, RAND_event() in OpenSSL 0.9.5a. =cut |