| 1 | .rn '' }` |
| 2 | ''' $RCSfile$$Revision$$Date$ |
| 3 | ''' |
| 4 | ''' $Log$ |
| 5 | ''' |
| 6 | .de Sh |
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| 10 | .PP |
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| 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 \{\ |
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| 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" "" |
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| 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 |
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| 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 |
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| 86 | .\" X<> Xref (embedded |
| 87 | .\" Of course, you have to process the output yourself |
| 88 | .\" in some meaninful fashion. |
| 89 | .if \nF \{ |
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| 91 | .tm Index:\\$1\t\\n%\t"\\$2" |
| 92 | .. |
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| 94 | .rr F |
| 95 | .\} |
| 96 | .TH SSL_CTX_set_info_callback 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' |
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| 108 | '.ft R |
| 109 | .. |
| 110 | .\" @(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2 |
| 111 | . \" AM - accent mark definitions |
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| 120 | .\} |
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| 170 | . \" for low resolution devices (crt and lpr) |
| 171 | .if \n(.H>23 .if \n(.V>19 \ |
| 172 | \{\ |
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| 186 | . ds oe oe |
| 187 | . ds Oe OE |
| 188 | .\} |
| 189 | .rm #[ #] #H #V #F C |
| 190 | .SH "NAME" |
| 191 | SSL_CTX_set_info_callback, SSL_CTX_get_info_callback, SSL_set_info_callback, SSL_get_info_callback \- handle information callback for SSL connections |
| 192 | .SH "SYNOPSIS" |
| 193 | .PP |
| 194 | .Vb 1 |
| 195 | \& #include <openssl/ssl.h> |
| 196 | .Ve |
| 197 | .Vb 2 |
| 198 | \& void SSL_CTX_set_info_callback(SSL_CTX *ctx, void (*callback)()); |
| 199 | \& void (*SSL_CTX_get_info_callback(SSL_CTX *ctx))(); |
| 200 | .Ve |
| 201 | .Vb 2 |
| 202 | \& void SSL_set_info_callback(SSL *ssl, void (*callback)()); |
| 203 | \& void (*SSL_get_info_callback(SSL *ssl))(); |
| 204 | .Ve |
| 205 | .SH "DESCRIPTION" |
| 206 | \fISSL_CTX_set_info_callback()\fR sets the \fBcallback\fR function, that can be used to |
| 207 | obtain state information for SSL objects created from \fBctx\fR during connection |
| 208 | setup and use. The setting for \fBctx\fR is overridden from the setting for |
| 209 | a specific SSL object, if specified. |
| 210 | When \fBcallback\fR is NULL, not callback function is used. |
| 211 | .PP |
| 212 | \fISSL_set_info_callback()\fR sets the \fBcallback\fR function, that can be used to |
| 213 | obtain state information for \fBssl\fR during connection setup and use. |
| 214 | When \fBcallback\fR is NULL, the callback setting currently valid for |
| 215 | \fBctx\fR is used. |
| 216 | .PP |
| 217 | \fISSL_CTX_get_info_callback()\fR returns a pointer to the currently set information |
| 218 | callback function for \fBctx\fR. |
| 219 | .PP |
| 220 | \fISSL_get_info_callback()\fR returns a pointer to the currently set information |
| 221 | callback function for \fBssl\fR. |
| 222 | .SH "NOTES" |
| 223 | When setting up a connection and during use, it is possible to obtain state |
| 224 | information from the SSL/TLS engine. When set, an information callback function |
| 225 | is called whenever the state changes, an alert appears, or an error occurs. |
| 226 | .PP |
| 227 | The callback function is called as \fBcallback(SSL *ssl, int where, int ret)\fR. |
| 228 | The \fBwhere\fR argument specifies information about where (in which context) |
| 229 | the callback function was called. If \fBret\fR is 0, an error condition occurred. |
| 230 | If an alert is handled, SSL_CB_ALERT is set and \fBret\fR specifies the alert |
| 231 | information. |
| 232 | .PP |
| 233 | \fBwhere\fR is a bitmask made up of the following bits: |
| 234 | .Ip "\s-1SSL_CB_LOOP\s0" 4 |
| 235 | Callback has been called to indicate state change inside a loop. |
| 236 | .Ip "\s-1SSL_CB_EXIT\s0" 4 |
| 237 | Callback has been called to indicate error exit of a handshake function. |
| 238 | (May be soft error with retry option for non-blocking setups.) |
| 239 | .Ip "\s-1SSL_CB_READ\s0" 4 |
| 240 | Callback has been called during read operation. |
| 241 | .Ip "\s-1SSL_CB_WRITE\s0" 4 |
| 242 | Callback has been called during write operation. |
| 243 | .Ip "\s-1SSL_CB_ALERT\s0" 4 |
| 244 | Callback has been called due to an alert being sent or received. |
| 245 | .Ip "\s-1SSL_CB_READ_ALERT\s0 (\s-1SSL_CB_ALERT\s0|\s-1SSL_CB_READ\s0)" 4 |
| 246 | .Ip "\s-1SSL_CB_WRITE_ALERT\s0 (\s-1SSL_CB_ALERT\s0|\s-1SSL_CB_WRITE\s0)" 4 |
| 247 | .Ip "\s-1SSL_CB_ACCEPT_LOOP\s0 (\s-1SSL_ST_ACCEPT\s0|\s-1SSL_CB_LOOP\s0)" 4 |
| 248 | .Ip "\s-1SSL_CB_ACCEPT_EXIT\s0 (\s-1SSL_ST_ACCEPT\s0|\s-1SSL_CB_EXIT\s0)" 4 |
| 249 | .Ip "\s-1SSL_CB_CONNECT_LOOP\s0 (\s-1SSL_ST_CONNECT\s0|\s-1SSL_CB_LOOP\s0)" 4 |
| 250 | .Ip "\s-1SSL_CB_CONNECT_EXIT\s0 (\s-1SSL_ST_CONNECT\s0|\s-1SSL_CB_EXIT\s0)" 4 |
| 251 | .Ip "\s-1SSL_CB_HANDSHAKE_START\s0" 4 |
| 252 | Callback has been called because a new handshake is started. |
| 253 | .Ip "\s-1SSL_CB_HANDSHAKE_DONE\s0 0x20" 4 |
| 254 | Callback has been called because a handshake is finished. |
| 255 | .PP |
| 256 | The current state information can be obtained using the |
| 257 | SSL_state_string(3) family of functions. |
| 258 | .PP |
| 259 | The \fBret\fR information can be evaluated using the |
| 260 | SSL_alert_type_string(3) family of functions. |
| 261 | .SH "RETURN VALUES" |
| 262 | \fISSL_set_info_callback()\fR does not provide diagnostic information. |
| 263 | .PP |
| 264 | \fISSL_get_info_callback()\fR returns the current setting. |
| 265 | .SH "EXAMPLES" |
| 266 | The following example callback function prints state strings, information |
| 267 | about alerts being handled and error messages to the \fBbio_err\fR BIO. |
| 268 | .PP |
| 269 | .Vb 4 |
| 270 | \& void apps_ssl_info_callback(SSL *s, int where, int ret) |
| 271 | \& { |
| 272 | \& const char *str; |
| 273 | \& int w; |
| 274 | .Ve |
| 275 | .Vb 1 |
| 276 | \& w=where& ~SSL_ST_MASK; |
| 277 | .Ve |
| 278 | .Vb 3 |
| 279 | \& if (w & SSL_ST_CONNECT) str="SSL_connect"; |
| 280 | \& else if (w & SSL_ST_ACCEPT) str="SSL_accept"; |
| 281 | \& else str="undefined"; |
| 282 | .Ve |
| 283 | .Vb 24 |
| 284 | \& if (where & SSL_CB_LOOP) |
| 285 | \& { |
| 286 | \& BIO_printf(bio_err,"%s:%s\en",str,SSL_state_string_long(s)); |
| 287 | \& } |
| 288 | \& else if (where & SSL_CB_ALERT) |
| 289 | \& { |
| 290 | \& str=(where & SSL_CB_READ)?"read":"write"; |
| 291 | \& BIO_printf(bio_err,"SSL3 alert %s:%s:%s\en", |
| 292 | \& str, |
| 293 | \& SSL_alert_type_string_long(ret), |
| 294 | \& SSL_alert_desc_string_long(ret)); |
| 295 | \& } |
| 296 | \& else if (where & SSL_CB_EXIT) |
| 297 | \& { |
| 298 | \& if (ret == 0) |
| 299 | \& BIO_printf(bio_err,"%s:failed in %s\en", |
| 300 | \& str,SSL_state_string_long(s)); |
| 301 | \& else if (ret < 0) |
| 302 | \& { |
| 303 | \& BIO_printf(bio_err,"%s:error in %s\en", |
| 304 | \& str,SSL_state_string_long(s)); |
| 305 | \& } |
| 306 | \& } |
| 307 | \& } |
| 308 | .Ve |
| 309 | .SH "SEE ALSO" |
| 310 | ssl(3), SSL_state_string(3), |
| 311 | SSL_alert_type_string(3) |
| 312 | |
| 313 | .rn }` '' |
| 314 | .IX Title "SSL_CTX_set_info_callback 3" |
| 315 | .IX Name "SSL_CTX_set_info_callback, SSL_CTX_get_info_callback, SSL_set_info_callback, SSL_get_info_callback - handle information callback for SSL connections" |
| 316 | |
| 317 | .IX Header "NAME" |
| 318 | |
| 319 | .IX Header "SYNOPSIS" |
| 320 | |
| 321 | .IX Header "DESCRIPTION" |
| 322 | |
| 323 | .IX Header "NOTES" |
| 324 | |
| 325 | .IX Item "\s-1SSL_CB_LOOP\s0" |
| 326 | |
| 327 | .IX Item "\s-1SSL_CB_EXIT\s0" |
| 328 | |
| 329 | .IX Item "\s-1SSL_CB_READ\s0" |
| 330 | |
| 331 | .IX Item "\s-1SSL_CB_WRITE\s0" |
| 332 | |
| 333 | .IX Item "\s-1SSL_CB_ALERT\s0" |
| 334 | |
| 335 | .IX Item "\s-1SSL_CB_READ_ALERT\s0 (\s-1SSL_CB_ALERT\s0|\s-1SSL_CB_READ\s0)" |
| 336 | |
| 337 | .IX Item "\s-1SSL_CB_WRITE_ALERT\s0 (\s-1SSL_CB_ALERT\s0|\s-1SSL_CB_WRITE\s0)" |
| 338 | |
| 339 | .IX Item "\s-1SSL_CB_ACCEPT_LOOP\s0 (\s-1SSL_ST_ACCEPT\s0|\s-1SSL_CB_LOOP\s0)" |
| 340 | |
| 341 | .IX Item "\s-1SSL_CB_ACCEPT_EXIT\s0 (\s-1SSL_ST_ACCEPT\s0|\s-1SSL_CB_EXIT\s0)" |
| 342 | |
| 343 | .IX Item "\s-1SSL_CB_CONNECT_LOOP\s0 (\s-1SSL_ST_CONNECT\s0|\s-1SSL_CB_LOOP\s0)" |
| 344 | |
| 345 | .IX Item "\s-1SSL_CB_CONNECT_EXIT\s0 (\s-1SSL_ST_CONNECT\s0|\s-1SSL_CB_EXIT\s0)" |
| 346 | |
| 347 | .IX Item "\s-1SSL_CB_HANDSHAKE_START\s0" |
| 348 | |
| 349 | .IX Item "\s-1SSL_CB_HANDSHAKE_DONE\s0 0x20" |
| 350 | |
| 351 | .IX Header "RETURN VALUES" |
| 352 | |
| 353 | .IX Header "EXAMPLES" |
| 354 | |
| 355 | .IX Header "SEE ALSO" |
| 356 | |