| 1 | .\" Automatically generated by Pod::Man 2.25 (Pod::Simple 3.23) |
| 2 | .\" |
| 3 | .\" Standard preamble: |
| 4 | .\" ======================================================================== |
| 5 | .de Sp \" Vertical space (when we can't use .PP) |
| 6 | .if t .sp .5v |
| 7 | .if n .sp |
| 8 | .. |
| 9 | .de Vb \" Begin verbatim text |
| 10 | .ft CW |
| 11 | .nf |
| 12 | .ne \\$1 |
| 13 | .. |
| 14 | .de Ve \" End verbatim text |
| 15 | .ft R |
| 16 | .fi |
| 17 | .. |
| 18 | .\" Set up some character translations and predefined strings. \*(-- will |
| 19 | .\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left |
| 20 | .\" double quote, and \*(R" will give a right double quote. \*(C+ will |
| 21 | .\" give a nicer C++. Capital omega is used to do unbreakable dashes and |
| 22 | .\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, |
| 23 | .\" nothing in troff, for use with C<>. |
| 24 | .tr \(*W- |
| 25 | .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' |
| 26 | .ie n \{\ |
| 27 | . ds -- \(*W- |
| 28 | . ds PI pi |
| 29 | . if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch |
| 30 | . if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch |
| 31 | . ds L" "" |
| 32 | . ds R" "" |
| 33 | . ds C` "" |
| 34 | . ds C' "" |
| 35 | 'br\} |
| 36 | .el\{\ |
| 37 | . ds -- \|\(em\| |
| 38 | . ds PI \(*p |
| 39 | . ds L" `` |
| 40 | . ds R" '' |
| 41 | 'br\} |
| 42 | .\" |
| 43 | .\" Escape single quotes in literal strings from groff's Unicode transform. |
| 44 | .ie \n(.g .ds Aq \(aq |
| 45 | .el .ds Aq ' |
| 46 | .\" |
| 47 | .\" If the F register is turned on, we'll generate index entries on stderr for |
| 48 | .\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index |
| 49 | .\" entries marked with X<> in POD. Of course, you'll have to process the |
| 50 | .\" output yourself in some meaningful fashion. |
| 51 | .ie \nF \{\ |
| 52 | . de IX |
| 53 | . tm Index:\\$1\t\\n%\t"\\$2" |
| 54 | .. |
| 55 | . nr % 0 |
| 56 | . rr F |
| 57 | .\} |
| 58 | .el \{\ |
| 59 | . de IX |
| 60 | .. |
| 61 | .\} |
| 62 | .\" |
| 63 | .\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). |
| 64 | .\" Fear. Run. Save yourself. No user-serviceable parts. |
| 65 | . \" fudge factors for nroff and troff |
| 66 | .if n \{\ |
| 67 | . ds #H 0 |
| 68 | . ds #V .8m |
| 69 | . ds #F .3m |
| 70 | . ds #[ \f1 |
| 71 | . ds #] \fP |
| 72 | .\} |
| 73 | .if t \{\ |
| 74 | . ds #H ((1u-(\\\\n(.fu%2u))*.13m) |
| 75 | . ds #V .6m |
| 76 | . ds #F 0 |
| 77 | . ds #[ \& |
| 78 | . ds #] \& |
| 79 | .\} |
| 80 | . \" simple accents for nroff and troff |
| 81 | .if n \{\ |
| 82 | . ds ' \& |
| 83 | . ds ` \& |
| 84 | . ds ^ \& |
| 85 | . ds , \& |
| 86 | . ds ~ ~ |
| 87 | . ds / |
| 88 | .\} |
| 89 | .if t \{\ |
| 90 | . ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" |
| 91 | . ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' |
| 92 | . ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' |
| 93 | . ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' |
| 94 | . ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' |
| 95 | . ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' |
| 96 | .\} |
| 97 | . \" troff and (daisy-wheel) nroff accents |
| 98 | .ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' |
| 99 | .ds 8 \h'\*(#H'\(*b\h'-\*(#H' |
| 100 | .ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] |
| 101 | .ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' |
| 102 | .ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' |
| 103 | .ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] |
| 104 | .ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] |
| 105 | .ds ae a\h'-(\w'a'u*4/10)'e |
| 106 | .ds Ae A\h'-(\w'A'u*4/10)'E |
| 107 | . \" corrections for vroff |
| 108 | .if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' |
| 109 | .if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' |
| 110 | . \" for low resolution devices (crt and lpr) |
| 111 | .if \n(.H>23 .if \n(.V>19 \ |
| 112 | \{\ |
| 113 | . ds : e |
| 114 | . ds 8 ss |
| 115 | . ds o a |
| 116 | . ds d- d\h'-1'\(ga |
| 117 | . ds D- D\h'-1'\(hy |
| 118 | . ds th \o'bp' |
| 119 | . ds Th \o'LP' |
| 120 | . ds ae ae |
| 121 | . ds Ae AE |
| 122 | .\} |
| 123 | .rm #[ #] #H #V #F C |
| 124 | .\" ======================================================================== |
| 125 | .\" |
| 126 | .IX Title "X509_VERIFY_PARAM_set_flags 3" |
| 127 | .TH X509_VERIFY_PARAM_set_flags 3 "2013-02-05" "1.0.1d" "OpenSSL" |
| 128 | .\" For nroff, turn off justification. Always turn off hyphenation; it makes |
| 129 | .\" way too many mistakes in technical documents. |
| 130 | .if n .ad l |
| 131 | .nh |
| 132 | .SH "NAME" |
| 133 | X509_VERIFY_PARAM_set_flags, X509_VERIFY_PARAM_clear_flags, X509_VERIFY_PARAM_get_flags, X509_VERIFY_PARAM_set_purpose, X509_VERIFY_PARAM_set_trust, X509_VERIFY_PARAM_set_depth, X509_VERIFY_PARAM_get_depth, X509_VERIFY_PARAM_set_time, X509_VERIFY_PARAM_add0_policy, X509_VERIFY_PARAM_set1_policies \- X509 verification parameters |
| 134 | .SH "SYNOPSIS" |
| 135 | .IX Header "SYNOPSIS" |
| 136 | .Vb 1 |
| 137 | \& #include <openssl/x509_vfy.h> |
| 138 | \& |
| 139 | \& int X509_VERIFY_PARAM_set_flags(X509_VERIFY_PARAM *param, unsigned long flags); |
| 140 | \& int X509_VERIFY_PARAM_clear_flags(X509_VERIFY_PARAM *param, |
| 141 | \& unsigned long flags); |
| 142 | \& unsigned long X509_VERIFY_PARAM_get_flags(X509_VERIFY_PARAM *param); |
| 143 | \& |
| 144 | \& int X509_VERIFY_PARAM_set_purpose(X509_VERIFY_PARAM *param, int purpose); |
| 145 | \& int X509_VERIFY_PARAM_set_trust(X509_VERIFY_PARAM *param, int trust); |
| 146 | \& |
| 147 | \& void X509_VERIFY_PARAM_set_time(X509_VERIFY_PARAM *param, time_t t); |
| 148 | \& |
| 149 | \& int X509_VERIFY_PARAM_add0_policy(X509_VERIFY_PARAM *param, |
| 150 | \& ASN1_OBJECT *policy); |
| 151 | \& int X509_VERIFY_PARAM_set1_policies(X509_VERIFY_PARAM *param, |
| 152 | \& STACK_OF(ASN1_OBJECT) *policies); |
| 153 | \& |
| 154 | \& void X509_VERIFY_PARAM_set_depth(X509_VERIFY_PARAM *param, int depth); |
| 155 | \& int X509_VERIFY_PARAM_get_depth(const X509_VERIFY_PARAM *param); |
| 156 | .Ve |
| 157 | .SH "DESCRIPTION" |
| 158 | .IX Header "DESCRIPTION" |
| 159 | These functions manipulate the \fBX509_VERIFY_PARAM\fR structure associated with |
| 160 | a certificate verification operation. |
| 161 | .PP |
| 162 | The \fIX509_VERIFY_PARAM_set_flags()\fR function sets the flags in \fBparam\fR by oring |
| 163 | it with \fBflags\fR. See the \fB\s-1VERIFICATION\s0 \s-1FLAGS\s0\fR section for a complete |
| 164 | description of values the \fBflags\fR parameter can take. |
| 165 | .PP |
| 166 | \&\fIX509_VERIFY_PARAM_get_flags()\fR returns the flags in \fBparam\fR. |
| 167 | .PP |
| 168 | \&\fIX509_VERIFY_PARAM_clear_flags()\fR clears the flags \fBflags\fR in \fBparam\fR. |
| 169 | .PP |
| 170 | \&\fIX509_VERIFY_PARAM_set_purpose()\fR sets the verification purpose in \fBparam\fR |
| 171 | to \fBpurpose\fR. This determines the acceptable purpose of the certificate |
| 172 | chain, for example \s-1SSL\s0 client or \s-1SSL\s0 server. |
| 173 | .PP |
| 174 | \&\fIX509_VERIFY_PARAM_set_trust()\fR sets the trust setting in \fBparam\fR to |
| 175 | \&\fBtrust\fR. |
| 176 | .PP |
| 177 | \&\fIX509_VERIFY_PARAM_set_time()\fR sets the verification time in \fBparam\fR to |
| 178 | \&\fBt\fR. Normally the current time is used. |
| 179 | .PP |
| 180 | \&\fIX509_VERIFY_PARAM_add0_policy()\fR enables policy checking (it is disabled |
| 181 | by default) and adds \fBpolicy\fR to the acceptable policy set. |
| 182 | .PP |
| 183 | \&\fIX509_VERIFY_PARAM_set1_policies()\fR enables policy checking (it is disabled |
| 184 | by default) and sets the acceptable policy set to \fBpolicies\fR. Any existing |
| 185 | policy set is cleared. The \fBpolicies\fR parameter can be \fB\s-1NULL\s0\fR to clear |
| 186 | an existing policy set. |
| 187 | .PP |
| 188 | \&\fIX509_VERIFY_PARAM_set_depth()\fR sets the maximum verification depth to \fBdepth\fR. |
| 189 | That is the maximum number of untrusted \s-1CA\s0 certificates that can appear in a |
| 190 | chain. |
| 191 | .SH "RETURN VALUES" |
| 192 | .IX Header "RETURN VALUES" |
| 193 | \&\fIX509_VERIFY_PARAM_set_flags()\fR, \fIX509_VERIFY_PARAM_clear_flags()\fR, |
| 194 | \&\fIX509_VERIFY_PARAM_set_purpose()\fR, \fIX509_VERIFY_PARAM_set_trust()\fR, |
| 195 | \&\fIX509_VERIFY_PARAM_add0_policy()\fR and \fIX509_VERIFY_PARAM_set1_policies()\fR return 1 |
| 196 | for success and 0 for failure. |
| 197 | .PP |
| 198 | \&\fIX509_VERIFY_PARAM_get_flags()\fR returns the current verification flags. |
| 199 | .PP |
| 200 | \&\fIX509_VERIFY_PARAM_set_time()\fR and \fIX509_VERIFY_PARAM_set_depth()\fR do not return |
| 201 | values. |
| 202 | .PP |
| 203 | \&\fIX509_VERIFY_PARAM_get_depth()\fR returns the current verification depth. |
| 204 | .SH "VERIFICATION FLAGS" |
| 205 | .IX Header "VERIFICATION FLAGS" |
| 206 | The verification flags consists of zero or more of the following flags |
| 207 | ored together. |
| 208 | .PP |
| 209 | \&\fBX509_V_FLAG_CRL_CHECK\fR enables \s-1CRL\s0 checking for the certificate chain leaf |
| 210 | certificate. An error occurs if a suitable \s-1CRL\s0 cannot be found. |
| 211 | .PP |
| 212 | \&\fBX509_V_FLAG_CRL_CHECK_ALL\fR enables \s-1CRL\s0 checking for the entire certificate |
| 213 | chain. |
| 214 | .PP |
| 215 | \&\fBX509_V_FLAG_IGNORE_CRITICAL\fR disabled critical extension checking. By default |
| 216 | any unhandled critical extensions in certificates or (if checked) CRLs results |
| 217 | in a fatal error. If this flag is set unhandled critical extensions are |
| 218 | ignored. \fB\s-1WARNING\s0\fR setting this option for anything other than debugging |
| 219 | purposes can be a security risk. Finer control over which extensions are |
| 220 | supported can be performed in the verification callback. |
| 221 | .PP |
| 222 | THe \fBX509_V_FLAG_X509_STRICT\fR flag disables workarounds for some broken |
| 223 | certificates and makes the verification strictly apply \fBX509\fR rules. |
| 224 | .PP |
| 225 | \&\fBX509_V_FLAG_ALLOW_PROXY_CERTS\fR enables proxy certificate verification. |
| 226 | .PP |
| 227 | \&\fBX509_V_FLAG_POLICY_CHECK\fR enables certificate policy checking, by default |
| 228 | no policy checking is peformed. Additional information is sent to the |
| 229 | verification callback relating to policy checking. |
| 230 | .PP |
| 231 | \&\fBX509_V_FLAG_EXPLICIT_POLICY\fR, \fBX509_V_FLAG_INHIBIT_ANY\fR and |
| 232 | \&\fBX509_V_FLAG_INHIBIT_MAP\fR set the \fBrequire explicit policy\fR, \fBinhibit any |
| 233 | policy\fR and \fBinhibit policy mapping\fR flags respectively as defined in |
| 234 | \&\fB\s-1RFC3280\s0\fR. Policy checking is automatically enabled if any of these flags |
| 235 | are set. |
| 236 | .PP |
| 237 | If \fBX509_V_FLAG_NOTIFY_POLICY\fR is set and the policy checking is successful |
| 238 | a special status code is set to the verification callback. This permits it |
| 239 | to examine the valid policy tree and perform additional checks or simply |
| 240 | log it for debugging purposes. |
| 241 | .PP |
| 242 | By default some addtional features such as indirect CRLs and CRLs signed by |
| 243 | different keys are disabled. If \fBX509_V_FLAG_EXTENDED_CRL_SUPPORT\fR is set |
| 244 | they are enabled. |
| 245 | .PP |
| 246 | If \fBX509_V_FLAG_USE_DELTAS\fR ise set delta CRLs (if present) are used to |
| 247 | determine certificate status. If not set deltas are ignored. |
| 248 | .PP |
| 249 | \&\fBX509_V_FLAG_CHECK_SS_SIGNATURE\fR enables checking of the root \s-1CA\s0 self signed |
| 250 | cerificate signature. By default this check is disabled because it doesn't |
| 251 | add any additional security but in some cases applications might want to |
| 252 | check the signature anyway. A side effect of not checking the root \s-1CA\s0 |
| 253 | signature is that disabled or unsupported message digests on the root \s-1CA\s0 |
| 254 | are not treated as fatal errors. |
| 255 | .PP |
| 256 | The \fBX509_V_FLAG_CB_ISSUER_CHECK\fR flag enables debugging of certificate |
| 257 | issuer checks. It is \fBnot\fR needed unless you are logging certificate |
| 258 | verification. If this flag is set then additional status codes will be sent |
| 259 | to the verification callback and it \fBmust\fR be prepared to handle such cases |
| 260 | without assuming they are hard errors. |
| 261 | .SH "NOTES" |
| 262 | .IX Header "NOTES" |
| 263 | The above functions should be used to manipulate verification parameters |
| 264 | instead of legacy functions which work in specific structures such as |
| 265 | \&\fIX509_STORE_CTX_set_flags()\fR. |
| 266 | .SH "BUGS" |
| 267 | .IX Header "BUGS" |
| 268 | Delta \s-1CRL\s0 checking is currently primitive. Only a single delta can be used and |
| 269 | (partly due to limitations of \fBX509_STORE\fR) constructed CRLs are not |
| 270 | maintained. |
| 271 | .PP |
| 272 | If CRLs checking is enable CRLs are expected to be available in the |
| 273 | corresponding \fBX509_STORE\fR structure. No attempt is made to download |
| 274 | CRLs from the \s-1CRL\s0 distribution points extension. |
| 275 | .SH "EXAMPLE" |
| 276 | .IX Header "EXAMPLE" |
| 277 | Enable \s-1CRL\s0 checking when performing certificate verification during \s-1SSL\s0 |
| 278 | connections associated with an \fB\s-1SSL_CTX\s0\fR structure \fBctx\fR: |
| 279 | .PP |
| 280 | .Vb 5 |
| 281 | \& X509_VERIFY_PARAM *param; |
| 282 | \& param = X509_VERIFY_PARAM_new(); |
| 283 | \& X509_VERIFY_PARAM_set_flags(param, X509_V_FLAG_CRL_CHECK); |
| 284 | \& SSL_CTX_set1_param(ctx, param); |
| 285 | \& X509_VERIFY_PARAM_free(param); |
| 286 | .Ve |
| 287 | .SH "SEE ALSO" |
| 288 | .IX Header "SEE ALSO" |
| 289 | \&\fIX509_verify_cert\fR\|(3) |
| 290 | .SH "HISTORY" |
| 291 | .IX Header "HISTORY" |
| 292 | \&\s-1TBA\s0 |