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Diffstat (limited to 'secure/lib/libcrypto/man/RAND_add.3')
| -rw-r--r-- | secure/lib/libcrypto/man/RAND_add.3 | 215 |
1 files changed, 0 insertions, 215 deletions
diff --git a/secure/lib/libcrypto/man/RAND_add.3 b/secure/lib/libcrypto/man/RAND_add.3 deleted file mode 100644 index 9d1673723f55..000000000000 --- a/secure/lib/libcrypto/man/RAND_add.3 +++ /dev/null @@ -1,215 +0,0 @@ -.\" Automatically generated by Pod::Man version 1.15 -.\" Wed Feb 19 16:42:56 2003 -.\" -.\" Standard preamble: -.\" ====================================================================== -.de Sh \" Subsection heading -.br -.if t .Sp -.ne 5 -.PP -\fB\\$1\fR -.PP -.. -.de Sp \" Vertical space (when we can't use .PP) -.if t .sp .5v -.if n .sp -.. -.de Ip \" List item -.br -.ie \\n(.$>=3 .ne \\$3 -.el .ne 3 -.IP "\\$1" \\$2 -.. -.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. | will give a -.\" real vertical bar. \*(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-|\(bv\*(Tr -.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" '' -'br\} -.\" -.\" If the F register is turned on, we'll generate index entries on stderr -.\" for titles (.TH), headers (.SH), subsections (.Sh), items (.Ip), and -.\" index entries marked with X<> in POD. Of course, you'll have to process -.\" the output yourself in some meaningful fashion. -.if \nF \{\ -. de IX -. tm Index:\\$1\t\\n%\t"\\$2" -.. -. nr % 0 -. rr F -.\} -.\" -.\" For nroff, turn off justification. Always turn off hyphenation; it -.\" makes way too many mistakes in technical documents. -.hy 0 -.if n .na -.\" -.\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). -.\" Fear. Run. Save yourself. No user-serviceable parts. -.bd B 3 -. \" fudge factors for nroff and troff -.if n \{\ -. ds #H 0 -. ds #V .8m -. ds #F .3m -. ds #[ \f1 -. ds #] \fP -.\} -.if t \{\ -. ds #H ((1u-(\\\\n(.fu%2u))*.13m) -. ds #V .6m -. ds #F 0 -. ds #[ \& -. ds #] \& -.\} -. \" simple accents for nroff and troff -.if n \{\ -. ds ' \& -. ds ` \& -. ds ^ \& -. ds , \& -. ds ~ ~ -. ds / -.\} -.if t \{\ -. ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" -. ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' -. ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' -. ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' -. ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' -. ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' -.\} -. \" troff and (daisy-wheel) nroff accents -.ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' -.ds 8 \h'\*(#H'\(*b\h'-\*(#H' -.ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] -.ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' -.ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' -.ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] -.ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] -.ds ae a\h'-(\w'a'u*4/10)'e -.ds Ae A\h'-(\w'A'u*4/10)'E -. \" corrections for vroff -.if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' -.if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' -. \" for low resolution devices (crt and lpr) -.if \n(.H>23 .if \n(.V>19 \ -\{\ -. ds : e -. ds 8 ss -. ds o a -. ds d- d\h'-1'\(ga -. ds D- D\h'-1'\(hy -. ds th \o'bp' -. ds Th \o'LP' -. ds ae ae -. ds Ae AE -.\} -.rm #[ #] #H #V #F C -.\" ====================================================================== -.\" -.IX Title "RAND_add 3" -.TH RAND_add 3 "0.9.7a" "2003-02-19" "OpenSSL" -.UC -.SH "NAME" -RAND_add, RAND_seed, RAND_status, RAND_event, RAND_screen \- add -entropy to the \s-1PRNG\s0 -.SH "SYNOPSIS" -.IX Header "SYNOPSIS" -.Vb 1 -\& #include <openssl/rand.h> -.Ve -.Vb 1 -\& void RAND_seed(const void *buf, int num); -.Ve -.Vb 1 -\& void RAND_add(const void *buf, int num, double entropy); -.Ve -.Vb 1 -\& int RAND_status(void); -.Ve -.Vb 2 -\& int RAND_event(UINT iMsg, WPARAM wParam, LPARAM lParam); -\& void RAND_screen(void); -.Ve -.SH "DESCRIPTION" -.IX Header "DESCRIPTION" -\&\fIRAND_add()\fR mixes the \fBnum\fR bytes at \fBbuf\fR into the \s-1PRNG\s0 state. Thus, -if the data at \fBbuf\fR are unpredictable to an adversary, this -increases the uncertainty about the state and makes the \s-1PRNG\s0 output -less predictable. Suitable input comes from user interaction (random -key presses, mouse movements) and certain hardware events. The -\&\fBentropy\fR argument is (the lower bound of) an estimate of how much -randomness is contained in \fBbuf\fR, measured in bytes. Details about -sources of randomness and how to estimate their entropy can be found -in the literature, e.g. \s-1RFC\s0 1750. -.PP -\&\fIRAND_add()\fR may be called with sensitive data such as user entered -passwords. The seed values cannot be recovered from the \s-1PRNG\s0 output. -.PP -OpenSSL makes sure that the \s-1PRNG\s0 state is unique for each thread. On -systems that provide \f(CW\*(C`/dev/urandom\*(C'\fR, the randomness device is used -to seed the \s-1PRNG\s0 transparently. However, on all other systems, the -application is responsible for seeding the \s-1PRNG\s0 by calling \fIRAND_add()\fR, -RAND_egd(3) -or RAND_load_file(3). -.PP -\&\fIRAND_seed()\fR is equivalent to \fIRAND_add()\fR when \fBnum == entropy\fR. -.PP -\&\fIRAND_event()\fR collects the entropy from Windows events such as mouse -movements and other user interaction. It should be called with the -\&\fBiMsg\fR, \fBwParam\fR and \fBlParam\fR arguments of \fIall\fR messages sent to -the window procedure. It will estimate the entropy contained in the -event message (if any), and add it to the \s-1PRNG\s0. The program can then -process the messages as usual. -.PP -The \fIRAND_screen()\fR function is available for the convenience of Windows -programmers. It adds the current contents of the screen to the \s-1PRNG\s0. -For applications that can catch Windows events, seeding the \s-1PRNG\s0 by -calling \fIRAND_event()\fR is a significantly better source of -randomness. It should be noted that both methods cannot be used on -servers that run without user interaction. -.SH "RETURN VALUES" -.IX Header "RETURN VALUES" -\&\fIRAND_status()\fR and \fIRAND_event()\fR return 1 if the \s-1PRNG\s0 has been seeded -with enough data, 0 otherwise. -.PP -The other functions do not return values. -.SH "SEE ALSO" -.IX Header "SEE ALSO" -rand(3), RAND_egd(3), -RAND_load_file(3), RAND_cleanup(3) -.SH "HISTORY" -.IX Header "HISTORY" -\&\fIRAND_seed()\fR and \fIRAND_screen()\fR are available in all versions of SSLeay -and OpenSSL. \fIRAND_add()\fR and \fIRAND_status()\fR have been added in OpenSSL -0.9.5, \fIRAND_event()\fR in OpenSSL 0.9.5a. |