| 1 | .rn '' }` |
| 2 | ''' $RCSfile$$Revision$$Date$ |
| 3 | ''' |
| 4 | ''' $Log$ |
| 5 | ''' |
| 6 | .de Sh |
| 7 | .br |
| 8 | .if t .Sp |
| 9 | .ne 5 |
| 10 | .PP |
| 11 | \fB\\$1\fR |
| 12 | .PP |
| 13 | .. |
| 14 | .de Sp |
| 15 | .if t .sp .5v |
| 16 | .if n .sp |
| 17 | .. |
| 18 | .de Ip |
| 19 | .br |
| 20 | .ie \\n(.$>=3 .ne \\$3 |
| 21 | .el .ne 3 |
| 22 | .IP "\\$1" \\$2 |
| 23 | .. |
| 24 | .de Vb |
| 25 | .ft CW |
| 26 | .nf |
| 27 | .ne \\$1 |
| 28 | .. |
| 29 | .de Ve |
| 30 | .ft R |
| 31 | |
| 32 | .fi |
| 33 | .. |
| 34 | ''' |
| 35 | ''' |
| 36 | ''' Set up \*(-- to give an unbreakable dash; |
| 37 | ''' string Tr holds user defined translation string. |
| 38 | ''' Bell System Logo is used as a dummy character. |
| 39 | ''' |
| 40 | .tr \(*W-|\(bv\*(Tr |
| 41 | .ie n \{\ |
| 42 | .ds -- \(*W- |
| 43 | .ds PI pi |
| 44 | .if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch |
| 45 | .if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch |
| 46 | .ds L" "" |
| 47 | .ds R" "" |
| 48 | ''' \*(M", \*(S", \*(N" and \*(T" are the equivalent of |
| 49 | ''' \*(L" and \*(R", except that they are used on ".xx" lines, |
| 50 | ''' such as .IP and .SH, which do another additional levels of |
| 51 | ''' double-quote interpretation |
| 52 | .ds M" """ |
| 53 | .ds S" """ |
| 54 | .ds N" """"" |
| 55 | .ds T" """"" |
| 56 | .ds L' ' |
| 57 | .ds R' ' |
| 58 | .ds M' ' |
| 59 | .ds S' ' |
| 60 | .ds N' ' |
| 61 | .ds T' ' |
| 62 | 'br\} |
| 63 | .el\{\ |
| 64 | .ds -- \(em\| |
| 65 | .tr \*(Tr |
| 66 | .ds L" `` |
| 67 | .ds R" '' |
| 68 | .ds M" `` |
| 69 | .ds S" '' |
| 70 | .ds N" `` |
| 71 | .ds T" '' |
| 72 | .ds L' ` |
| 73 | .ds R' ' |
| 74 | .ds M' ` |
| 75 | .ds S' ' |
| 76 | .ds N' ` |
| 77 | .ds T' ' |
| 78 | .ds PI \(*p |
| 79 | 'br\} |
| 80 | .\" If the F register is turned on, we'll generate |
| 81 | .\" index entries out stderr for the following things: |
| 82 | .\" TH Title |
| 83 | .\" SH Header |
| 84 | .\" Sh Subsection |
| 85 | .\" Ip Item |
| 86 | .\" X<> Xref (embedded |
| 87 | .\" Of course, you have to process the output yourself |
| 88 | .\" in some meaninful fashion. |
| 89 | .if \nF \{ |
| 90 | .de IX |
| 91 | .tm Index:\\$1\t\\n%\t"\\$2" |
| 92 | .. |
| 93 | .nr % 0 |
| 94 | .rr F |
| 95 | .\} |
| 96 | .TH RAND_set_rand_method 3 "0.9.7d" "2/Sep/2004" "OpenSSL" |
| 97 | .UC |
| 98 | .if n .hy 0 |
| 99 | .if n .na |
| 100 | .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' |
| 101 | .de CQ \" put $1 in typewriter font |
| 102 | .ft CW |
| 103 | 'if n "\c |
| 104 | 'if t \\&\\$1\c |
| 105 | 'if n \\&\\$1\c |
| 106 | 'if n \&" |
| 107 | \\&\\$2 \\$3 \\$4 \\$5 \\$6 \\$7 |
| 108 | '.ft R |
| 109 | .. |
| 110 | .\" @(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2 |
| 111 | . \" AM - accent mark definitions |
| 112 | .bd B 3 |
| 113 | . \" fudge factors for nroff and troff |
| 114 | .if n \{\ |
| 115 | . ds #H 0 |
| 116 | . ds #V .8m |
| 117 | . ds #F .3m |
| 118 | . ds #[ \f1 |
| 119 | . ds #] \fP |
| 120 | .\} |
| 121 | .if t \{\ |
| 122 | . ds #H ((1u-(\\\\n(.fu%2u))*.13m) |
| 123 | . ds #V .6m |
| 124 | . ds #F 0 |
| 125 | . ds #[ \& |
| 126 | . ds #] \& |
| 127 | .\} |
| 128 | . \" simple accents for nroff and troff |
| 129 | .if n \{\ |
| 130 | . ds ' \& |
| 131 | . ds ` \& |
| 132 | . ds ^ \& |
| 133 | . ds , \& |
| 134 | . ds ~ ~ |
| 135 | . ds ? ? |
| 136 | . ds ! ! |
| 137 | . ds / |
| 138 | . ds q |
| 139 | .\} |
| 140 | .if t \{\ |
| 141 | . ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" |
| 142 | . ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' |
| 143 | . ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' |
| 144 | . ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' |
| 145 | . ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' |
| 146 | . ds ? \s-2c\h'-\w'c'u*7/10'\u\h'\*(#H'\zi\d\s+2\h'\w'c'u*8/10' |
| 147 | . ds ! \s-2\(or\s+2\h'-\w'\(or'u'\v'-.8m'.\v'.8m' |
| 148 | . ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' |
| 149 | . ds q o\h'-\w'o'u*8/10'\s-4\v'.4m'\z\(*i\v'-.4m'\s+4\h'\w'o'u*8/10' |
| 150 | .\} |
| 151 | . \" troff and (daisy-wheel) nroff accents |
| 152 | .ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' |
| 153 | .ds 8 \h'\*(#H'\(*b\h'-\*(#H' |
| 154 | .ds v \\k:\h'-(\\n(.wu*9/10-\*(#H)'\v'-\*(#V'\*(#[\s-4v\s0\v'\*(#V'\h'|\\n:u'\*(#] |
| 155 | .ds _ \\k:\h'-(\\n(.wu*9/10-\*(#H+(\*(#F*2/3))'\v'-.4m'\z\(hy\v'.4m'\h'|\\n:u' |
| 156 | .ds . \\k:\h'-(\\n(.wu*8/10)'\v'\*(#V*4/10'\z.\v'-\*(#V*4/10'\h'|\\n:u' |
| 157 | .ds 3 \*(#[\v'.2m'\s-2\&3\s0\v'-.2m'\*(#] |
| 158 | .ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] |
| 159 | .ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' |
| 160 | .ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' |
| 161 | .ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] |
| 162 | .ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] |
| 163 | .ds ae a\h'-(\w'a'u*4/10)'e |
| 164 | .ds Ae A\h'-(\w'A'u*4/10)'E |
| 165 | .ds oe o\h'-(\w'o'u*4/10)'e |
| 166 | .ds Oe O\h'-(\w'O'u*4/10)'E |
| 167 | . \" corrections for vroff |
| 168 | .if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' |
| 169 | .if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' |
| 170 | . \" for low resolution devices (crt and lpr) |
| 171 | .if \n(.H>23 .if \n(.V>19 \ |
| 172 | \{\ |
| 173 | . ds : e |
| 174 | . ds 8 ss |
| 175 | . ds v \h'-1'\o'\(aa\(ga' |
| 176 | . ds _ \h'-1'^ |
| 177 | . ds . \h'-1'. |
| 178 | . ds 3 3 |
| 179 | . ds o a |
| 180 | . ds d- d\h'-1'\(ga |
| 181 | . ds D- D\h'-1'\(hy |
| 182 | . ds th \o'bp' |
| 183 | . ds Th \o'LP' |
| 184 | . ds ae ae |
| 185 | . ds Ae AE |
| 186 | . ds oe oe |
| 187 | . ds Oe OE |
| 188 | .\} |
| 189 | .rm #[ #] #H #V #F C |
| 190 | .SH "NAME" |
| 191 | RAND_set_rand_method, RAND_get_rand_method, RAND_SSLeay \- select RAND method |
| 192 | .SH "SYNOPSIS" |
| 193 | .PP |
| 194 | .Vb 1 |
| 195 | \& #include <openssl/rand.h> |
| 196 | .Ve |
| 197 | .Vb 1 |
| 198 | \& void RAND_set_rand_method(const RAND_METHOD *meth); |
| 199 | .Ve |
| 200 | .Vb 1 |
| 201 | \& const RAND_METHOD *RAND_get_rand_method(void); |
| 202 | .Ve |
| 203 | .Vb 1 |
| 204 | \& RAND_METHOD *RAND_SSLeay(void); |
| 205 | .Ve |
| 206 | .SH "DESCRIPTION" |
| 207 | A \fBRAND_METHOD\fR specifies the functions that OpenSSL uses for random number |
| 208 | generation. By modifying the method, alternative implementations such as |
| 209 | hardware RNGs may be used. IMPORTANT: See the NOTES section for important |
| 210 | information about how these RAND API functions are affected by the use of |
| 211 | \fBENGINE\fR API calls. |
| 212 | .PP |
| 213 | Initially, the default RAND_METHOD is the OpenSSL internal implementation, as |
| 214 | returned by \fIRAND_SSLeay()\fR. |
| 215 | .PP |
| 216 | \fIRAND_set_default_method()\fR makes \fBmeth\fR the method for PRNG use. \fBNB\fR: This is |
| 217 | true only whilst no ENGINE has been set as a default for RAND, so this function |
| 218 | is no longer recommended. |
| 219 | .PP |
| 220 | \fIRAND_get_default_method()\fR returns a pointer to the current RAND_METHOD. |
| 221 | However, the meaningfulness of this result is dependant on whether the ENGINE |
| 222 | API is being used, so this function is no longer recommended. |
| 223 | .SH "THE RAND_METHOD STRUCTURE" |
| 224 | .PP |
| 225 | .Vb 9 |
| 226 | \& typedef struct rand_meth_st |
| 227 | \& { |
| 228 | \& void (*seed)(const void *buf, int num); |
| 229 | \& int (*bytes)(unsigned char *buf, int num); |
| 230 | \& void (*cleanup)(void); |
| 231 | \& void (*add)(const void *buf, int num, int entropy); |
| 232 | \& int (*pseudorand)(unsigned char *buf, int num); |
| 233 | \& int (*status)(void); |
| 234 | \& } RAND_METHOD; |
| 235 | .Ve |
| 236 | The components point to the implementation of \fIRAND_seed()\fR, |
| 237 | \fIRAND_bytes()\fR, \fIRAND_cleanup()\fR, \fIRAND_add()\fR, \fIRAND_pseudo_rand()\fR |
| 238 | and \fIRAND_status()\fR. |
| 239 | Each component may be NULL if the function is not implemented. |
| 240 | .SH "RETURN VALUES" |
| 241 | \fIRAND_set_rand_method()\fR returns no value. \fIRAND_get_rand_method()\fR and |
| 242 | \fIRAND_SSLeay()\fR return pointers to the respective methods. |
| 243 | .SH "NOTES" |
| 244 | As of version 0.9.7, RAND_METHOD implementations are grouped together with other |
| 245 | algorithmic APIs (eg. RSA_METHOD, EVP_CIPHER, etc) in \fBENGINE\fR modules. If a |
| 246 | default ENGINE is specified for RAND functionality using an ENGINE API function, |
| 247 | that will override any RAND defaults set using the RAND API (ie. |
| 248 | \fIRAND_set_rand_method()\fR). For this reason, the ENGINE API is the recommended way |
| 249 | to control default implementations for use in RAND and other cryptographic |
| 250 | algorithms. |
| 251 | .SH "SEE ALSO" |
| 252 | rand(3), engine(3) |
| 253 | .SH "HISTORY" |
| 254 | \fIRAND_set_rand_method()\fR, \fIRAND_get_rand_method()\fR and \fIRAND_SSLeay()\fR are |
| 255 | available in all versions of OpenSSL. |
| 256 | .PP |
| 257 | In the engine version of version 0.9.6, \fIRAND_set_rand_method()\fR was altered to |
| 258 | take an ENGINE pointer as its argument. As of version 0.9.7, that has been |
| 259 | reverted as the ENGINE API transparently overrides RAND defaults if used, |
| 260 | otherwise RAND API functions work as before. \fIRAND_set_rand_engine()\fR was also |
| 261 | introduced in version 0.9.7. |
| 262 | |
| 263 | .rn }` '' |
| 264 | .IX Title "RAND_set_rand_method 3" |
| 265 | .IX Name "RAND_set_rand_method, RAND_get_rand_method, RAND_SSLeay - select RAND method" |
| 266 | |
| 267 | .IX Header "NAME" |
| 268 | |
| 269 | .IX Header "SYNOPSIS" |
| 270 | |
| 271 | .IX Header "DESCRIPTION" |
| 272 | |
| 273 | .IX Header "THE RAND_METHOD STRUCTURE" |
| 274 | |
| 275 | .IX Header "RETURN VALUES" |
| 276 | |
| 277 | .IX Header "NOTES" |
| 278 | |
| 279 | .IX Header "SEE ALSO" |
| 280 | |
| 281 | .IX Header "HISTORY" |
| 282 | |