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| 124 | .\" ======================================================================== |
| 125 | .\" |
| 126 | .IX Title "X509_STORE_CTX_get_error 3" |
| 127 | .TH X509_STORE_CTX_get_error 3 "2012-01-04" "1.0.0f" "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_STORE_CTX_get_error, X509_STORE_CTX_set_error, X509_STORE_CTX_get_error_depth, X509_STORE_CTX_get_current_cert, X509_STORE_CTX_get1_chain, X509_verify_cert_error_string \- get or set certificate verification status information |
| 134 | .SH "SYNOPSIS" |
| 135 | .IX Header "SYNOPSIS" |
| 136 | .Vb 2 |
| 137 | \& #include <openssl/x509.h> |
| 138 | \& #include <openssl/x509_vfy.h> |
| 139 | \& |
| 140 | \& int X509_STORE_CTX_get_error(X509_STORE_CTX *ctx); |
| 141 | \& void X509_STORE_CTX_set_error(X509_STORE_CTX *ctx,int s); |
| 142 | \& int X509_STORE_CTX_get_error_depth(X509_STORE_CTX *ctx); |
| 143 | \& X509 * X509_STORE_CTX_get_current_cert(X509_STORE_CTX *ctx); |
| 144 | \& |
| 145 | \& STACK_OF(X509) *X509_STORE_CTX_get1_chain(X509_STORE_CTX *ctx); |
| 146 | \& |
| 147 | \& const char *X509_verify_cert_error_string(long n); |
| 148 | .Ve |
| 149 | .SH "DESCRIPTION" |
| 150 | .IX Header "DESCRIPTION" |
| 151 | These functions are typically called after \fIX509_verify_cert()\fR has indicated |
| 152 | an error or in a verification callback to determine the nature of an error. |
| 153 | .PP |
| 154 | \&\fIX509_STORE_CTX_get_error()\fR returns the error code of \fBctx\fR, see |
| 155 | the \fB\s-1ERROR\s0 \s-1CODES\s0\fR section for a full description of all error codes. |
| 156 | .PP |
| 157 | \&\fIX509_STORE_CTX_set_error()\fR sets the error code of \fBctx\fR to \fBs\fR. For example |
| 158 | it might be used in a verification callback to set an error based on additional |
| 159 | checks. |
| 160 | .PP |
| 161 | \&\fIX509_STORE_CTX_get_error_depth()\fR returns the \fBdepth\fR of the error. This is a |
| 162 | non-negative integer representing where in the certificate chain the error |
| 163 | occurred. If it is zero it occured in the end entity certificate, one if |
| 164 | it is the certificate which signed the end entity certificate and so on. |
| 165 | .PP |
| 166 | \&\fIX509_STORE_CTX_get_current_cert()\fR returns the certificate in \fBctx\fR which |
| 167 | caused the error or \fB\s-1NULL\s0\fR if no certificate is relevant. |
| 168 | .PP |
| 169 | \&\fIX509_STORE_CTX_get1_chain()\fR returns a complete validate chain if a previous |
| 170 | call to \fIX509_verify_cert()\fR is successful. If the call to \fIX509_verify_cert()\fR |
| 171 | is \fBnot\fR successful the returned chain may be incomplete or invalid. The |
| 172 | returned chain persists after the \fBctx\fR structure is freed, when it is |
| 173 | no longer needed it should be free up using: |
| 174 | .PP |
| 175 | .Vb 1 |
| 176 | \& sk_X509_pop_free(chain, X509_free); |
| 177 | .Ve |
| 178 | .PP |
| 179 | \&\fIX509_verify_cert_error_string()\fR returns a human readable error string for |
| 180 | verification error \fBn\fR. |
| 181 | .SH "RETURN VALUES" |
| 182 | .IX Header "RETURN VALUES" |
| 183 | \&\fIX509_STORE_CTX_get_error()\fR returns \fBX509_V_OK\fR or an error code. |
| 184 | .PP |
| 185 | \&\fIX509_STORE_CTX_get_error_depth()\fR returns a non-negative error depth. |
| 186 | .PP |
| 187 | \&\fIX509_STORE_CTX_get_current_cert()\fR returns the cerificate which caused the |
| 188 | error or \fB\s-1NULL\s0\fR if no certificate is relevant to the error. |
| 189 | .PP |
| 190 | \&\fIX509_verify_cert_error_string()\fR returns a human readable error string for |
| 191 | verification error \fBn\fR. |
| 192 | .SH "ERROR CODES" |
| 193 | .IX Header "ERROR CODES" |
| 194 | A list of error codes and messages is shown below. Some of the |
| 195 | error codes are defined but currently never returned: these are described as |
| 196 | \&\*(L"unused\*(R". |
| 197 | .IP "\fBX509_V_OK: ok\fR" 4 |
| 198 | .IX Item "X509_V_OK: ok" |
| 199 | the operation was successful. |
| 200 | .IP "\fBX509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: unable to get issuer certificate\fR" 4 |
| 201 | .IX Item "X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT: unable to get issuer certificate" |
| 202 | the issuer certificate could not be found: this occurs if the issuer certificate |
| 203 | of an untrusted certificate cannot be found. |
| 204 | .IP "\fBX509_V_ERR_UNABLE_TO_GET_CRL: unable to get certificate \s-1CRL\s0\fR" 4 |
| 205 | .IX Item "X509_V_ERR_UNABLE_TO_GET_CRL: unable to get certificate CRL" |
| 206 | the \s-1CRL\s0 of a certificate could not be found. |
| 207 | .IP "\fBX509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: unable to decrypt certificate's signature\fR" 4 |
| 208 | .IX Item "X509_V_ERR_UNABLE_TO_DECRYPT_CERT_SIGNATURE: unable to decrypt certificate's signature" |
| 209 | the certificate signature could not be decrypted. This means that the actual |
| 210 | signature value could not be determined rather than it not matching the |
| 211 | expected value, this is only meaningful for \s-1RSA\s0 keys. |
| 212 | .IP "\fBX509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: unable to decrypt \s-1CRL\s0's signature\fR" 4 |
| 213 | .IX Item "X509_V_ERR_UNABLE_TO_DECRYPT_CRL_SIGNATURE: unable to decrypt CRL's signature" |
| 214 | the \s-1CRL\s0 signature could not be decrypted: this means that the actual signature |
| 215 | value could not be determined rather than it not matching the expected value. |
| 216 | Unused. |
| 217 | .IP "\fBX509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: unable to decode issuer public key\fR" 4 |
| 218 | .IX Item "X509_V_ERR_UNABLE_TO_DECODE_ISSUER_PUBLIC_KEY: unable to decode issuer public key" |
| 219 | the public key in the certificate SubjectPublicKeyInfo could not be read. |
| 220 | .IP "\fBX509_V_ERR_CERT_SIGNATURE_FAILURE: certificate signature failure\fR" 4 |
| 221 | .IX Item "X509_V_ERR_CERT_SIGNATURE_FAILURE: certificate signature failure" |
| 222 | the signature of the certificate is invalid. |
| 223 | .IP "\fBX509_V_ERR_CRL_SIGNATURE_FAILURE: \s-1CRL\s0 signature failure\fR" 4 |
| 224 | .IX Item "X509_V_ERR_CRL_SIGNATURE_FAILURE: CRL signature failure" |
| 225 | the signature of the certificate is invalid. |
| 226 | .IP "\fBX509_V_ERR_CERT_NOT_YET_VALID: certificate is not yet valid\fR" 4 |
| 227 | .IX Item "X509_V_ERR_CERT_NOT_YET_VALID: certificate is not yet valid" |
| 228 | the certificate is not yet valid: the notBefore date is after the current time. |
| 229 | .IP "\fBX509_V_ERR_CERT_HAS_EXPIRED: certificate has expired\fR" 4 |
| 230 | .IX Item "X509_V_ERR_CERT_HAS_EXPIRED: certificate has expired" |
| 231 | the certificate has expired: that is the notAfter date is before the current time. |
| 232 | .IP "\fBX509_V_ERR_CRL_NOT_YET_VALID: \s-1CRL\s0 is not yet valid\fR" 4 |
| 233 | .IX Item "X509_V_ERR_CRL_NOT_YET_VALID: CRL is not yet valid" |
| 234 | the \s-1CRL\s0 is not yet valid. |
| 235 | .IP "\fBX509_V_ERR_CRL_HAS_EXPIRED: \s-1CRL\s0 has expired\fR" 4 |
| 236 | .IX Item "X509_V_ERR_CRL_HAS_EXPIRED: CRL has expired" |
| 237 | the \s-1CRL\s0 has expired. |
| 238 | .IP "\fBX509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: format error in certificate's notBefore field\fR" 4 |
| 239 | .IX Item "X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD: format error in certificate's notBefore field" |
| 240 | the certificate notBefore field contains an invalid time. |
| 241 | .IP "\fBX509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: format error in certificate's notAfter field\fR" 4 |
| 242 | .IX Item "X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD: format error in certificate's notAfter field" |
| 243 | the certificate notAfter field contains an invalid time. |
| 244 | .IP "\fBX509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: format error in \s-1CRL\s0's lastUpdate field\fR" 4 |
| 245 | .IX Item "X509_V_ERR_ERROR_IN_CRL_LAST_UPDATE_FIELD: format error in CRL's lastUpdate field" |
| 246 | the \s-1CRL\s0 lastUpdate field contains an invalid time. |
| 247 | .IP "\fBX509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: format error in \s-1CRL\s0's nextUpdate field\fR" 4 |
| 248 | .IX Item "X509_V_ERR_ERROR_IN_CRL_NEXT_UPDATE_FIELD: format error in CRL's nextUpdate field" |
| 249 | the \s-1CRL\s0 nextUpdate field contains an invalid time. |
| 250 | .IP "\fBX509_V_ERR_OUT_OF_MEM: out of memory\fR" 4 |
| 251 | .IX Item "X509_V_ERR_OUT_OF_MEM: out of memory" |
| 252 | an error occurred trying to allocate memory. This should never happen. |
| 253 | .IP "\fBX509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: self signed certificate\fR" 4 |
| 254 | .IX Item "X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT: self signed certificate" |
| 255 | the passed certificate is self signed and the same certificate cannot be found |
| 256 | in the list of trusted certificates. |
| 257 | .IP "\fBX509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: self signed certificate in certificate chain\fR" 4 |
| 258 | .IX Item "X509_V_ERR_SELF_SIGNED_CERT_IN_CHAIN: self signed certificate in certificate chain" |
| 259 | the certificate chain could be built up using the untrusted certificates but |
| 260 | the root could not be found locally. |
| 261 | .IP "\fBX509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: unable to get local issuer certificate\fR" 4 |
| 262 | .IX Item "X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT_LOCALLY: unable to get local issuer certificate" |
| 263 | the issuer certificate of a locally looked up certificate could not be found. |
| 264 | This normally means the list of trusted certificates is not complete. |
| 265 | .IP "\fBX509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: unable to verify the first certificate\fR" 4 |
| 266 | .IX Item "X509_V_ERR_UNABLE_TO_VERIFY_LEAF_SIGNATURE: unable to verify the first certificate" |
| 267 | no signatures could be verified because the chain contains only one certificate |
| 268 | and it is not self signed. |
| 269 | .IP "\fBX509_V_ERR_CERT_CHAIN_TOO_LONG: certificate chain too long\fR" 4 |
| 270 | .IX Item "X509_V_ERR_CERT_CHAIN_TOO_LONG: certificate chain too long" |
| 271 | the certificate chain length is greater than the supplied maximum depth. Unused. |
| 272 | .IP "\fBX509_V_ERR_CERT_REVOKED: certificate revoked\fR" 4 |
| 273 | .IX Item "X509_V_ERR_CERT_REVOKED: certificate revoked" |
| 274 | the certificate has been revoked. |
| 275 | .IP "\fBX509_V_ERR_INVALID_CA: invalid \s-1CA\s0 certificate\fR" 4 |
| 276 | .IX Item "X509_V_ERR_INVALID_CA: invalid CA certificate" |
| 277 | a \s-1CA\s0 certificate is invalid. Either it is not a \s-1CA\s0 or its extensions are not |
| 278 | consistent with the supplied purpose. |
| 279 | .IP "\fBX509_V_ERR_PATH_LENGTH_EXCEEDED: path length constraint exceeded\fR" 4 |
| 280 | .IX Item "X509_V_ERR_PATH_LENGTH_EXCEEDED: path length constraint exceeded" |
| 281 | the basicConstraints pathlength parameter has been exceeded. |
| 282 | .IP "\fBX509_V_ERR_INVALID_PURPOSE: unsupported certificate purpose\fR" 4 |
| 283 | .IX Item "X509_V_ERR_INVALID_PURPOSE: unsupported certificate purpose" |
| 284 | the supplied certificate cannot be used for the specified purpose. |
| 285 | .IP "\fBX509_V_ERR_CERT_UNTRUSTED: certificate not trusted\fR" 4 |
| 286 | .IX Item "X509_V_ERR_CERT_UNTRUSTED: certificate not trusted" |
| 287 | the root \s-1CA\s0 is not marked as trusted for the specified purpose. |
| 288 | .IP "\fBX509_V_ERR_CERT_REJECTED: certificate rejected\fR" 4 |
| 289 | .IX Item "X509_V_ERR_CERT_REJECTED: certificate rejected" |
| 290 | the root \s-1CA\s0 is marked to reject the specified purpose. |
| 291 | .IP "\fBX509_V_ERR_SUBJECT_ISSUER_MISMATCH: subject issuer mismatch\fR" 4 |
| 292 | .IX Item "X509_V_ERR_SUBJECT_ISSUER_MISMATCH: subject issuer mismatch" |
| 293 | the current candidate issuer certificate was rejected because its subject name |
| 294 | did not match the issuer name of the current certificate. This is only set |
| 295 | if issuer check debugging is enabled it is used for status notification and |
| 296 | is \fBnot\fR in itself an error. |
| 297 | .IP "\fBX509_V_ERR_AKID_SKID_MISMATCH: authority and subject key identifier mismatch\fR" 4 |
| 298 | .IX Item "X509_V_ERR_AKID_SKID_MISMATCH: authority and subject key identifier mismatch" |
| 299 | the current candidate issuer certificate was rejected because its subject key |
| 300 | identifier was present and did not match the authority key identifier current |
| 301 | certificate. This is only set if issuer check debugging is enabled it is used |
| 302 | for status notification and is \fBnot\fR in itself an error. |
| 303 | .IP "\fBX509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH: authority and issuer serial number mismatch\fR" 4 |
| 304 | .IX Item "X509_V_ERR_AKID_ISSUER_SERIAL_MISMATCH: authority and issuer serial number mismatch" |
| 305 | the current candidate issuer certificate was rejected because its issuer name |
| 306 | and serial number was present and did not match the authority key identifier of |
| 307 | the current certificate. This is only set if issuer check debugging is enabled |
| 308 | it is used for status notification and is \fBnot\fR in itself an error. |
| 309 | .IP "\fBX509_V_ERR_KEYUSAGE_NO_CERTSIGN:key usage does not include certificate signing\fR" 4 |
| 310 | .IX Item "X509_V_ERR_KEYUSAGE_NO_CERTSIGN:key usage does not include certificate signing" |
| 311 | the current candidate issuer certificate was rejected because its keyUsage |
| 312 | extension does not permit certificate signing. This is only set if issuer check |
| 313 | debugging is enabled it is used for status notification and is \fBnot\fR in itself |
| 314 | an error. |
| 315 | .IP "\fBX509_V_ERR_INVALID_EXTENSION: invalid or inconsistent certificate extension\fR" 4 |
| 316 | .IX Item "X509_V_ERR_INVALID_EXTENSION: invalid or inconsistent certificate extension" |
| 317 | A certificate extension had an invalid value (for example an incorrect |
| 318 | encoding) or some value inconsistent with other extensions. |
| 319 | .IP "\fBX509_V_ERR_INVALID_POLICY_EXTENSION: invalid or inconsistent certificate policy extension\fR" 4 |
| 320 | .IX Item "X509_V_ERR_INVALID_POLICY_EXTENSION: invalid or inconsistent certificate policy extension" |
| 321 | A certificate policies extension had an invalid value (for example an incorrect |
| 322 | encoding) or some value inconsistent with other extensions. This error only |
| 323 | occurs if policy processing is enabled. |
| 324 | .IP "\fBX509_V_ERR_NO_EXPLICIT_POLICY: no explicit policy\fR" 4 |
| 325 | .IX Item "X509_V_ERR_NO_EXPLICIT_POLICY: no explicit policy" |
| 326 | The verification flags were set to require and explicit policy but none was |
| 327 | present. |
| 328 | .IP "\fBX509_V_ERR_DIFFERENT_CRL_SCOPE: Different \s-1CRL\s0 scope\fR" 4 |
| 329 | .IX Item "X509_V_ERR_DIFFERENT_CRL_SCOPE: Different CRL scope" |
| 330 | The only CRLs that could be found did not match the scope of the certificate. |
| 331 | .IP "\fBX509_V_ERR_UNSUPPORTED_EXTENSION_FEATURE: Unsupported extension feature\fR" 4 |
| 332 | .IX Item "X509_V_ERR_UNSUPPORTED_EXTENSION_FEATURE: Unsupported extension feature" |
| 333 | Some feature of a certificate extension is not supported. Unused. |
| 334 | .IP "\fBX509_V_ERR_PERMITTED_VIOLATION: permitted subtree violation\fR" 4 |
| 335 | .IX Item "X509_V_ERR_PERMITTED_VIOLATION: permitted subtree violation" |
| 336 | A name constraint violation occured in the permitted subtrees. |
| 337 | .IP "\fBX509_V_ERR_EXCLUDED_VIOLATION: excluded subtree violation\fR" 4 |
| 338 | .IX Item "X509_V_ERR_EXCLUDED_VIOLATION: excluded subtree violation" |
| 339 | A name constraint violation occured in the excluded subtrees. |
| 340 | .IP "\fBX509_V_ERR_SUBTREE_MINMAX: name constraints minimum and maximum not supported\fR" 4 |
| 341 | .IX Item "X509_V_ERR_SUBTREE_MINMAX: name constraints minimum and maximum not supported" |
| 342 | A certificate name constraints extension included a minimum or maximum field: |
| 343 | this is not supported. |
| 344 | .IP "\fBX509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE: unsupported name constraint type\fR" 4 |
| 345 | .IX Item "X509_V_ERR_UNSUPPORTED_CONSTRAINT_TYPE: unsupported name constraint type" |
| 346 | An unsupported name constraint type was encountered. OpenSSL currently only |
| 347 | supports directory name, \s-1DNS\s0 name, email and \s-1URI\s0 types. |
| 348 | .IP "\fBX509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX: unsupported or invalid name constraint syntax\fR" 4 |
| 349 | .IX Item "X509_V_ERR_UNSUPPORTED_CONSTRAINT_SYNTAX: unsupported or invalid name constraint syntax" |
| 350 | The format of the name constraint is not recognised: for example an email |
| 351 | address format of a form not mentioned in \s-1RFC3280\s0. This could be caused by |
| 352 | a garbage extension or some new feature not currently supported. |
| 353 | .IP "\fBX509_V_ERR_CRL_PATH_VALIDATION_ERROR: \s-1CRL\s0 path validation error\fR" 4 |
| 354 | .IX Item "X509_V_ERR_CRL_PATH_VALIDATION_ERROR: CRL path validation error" |
| 355 | An error occured when attempting to verify the \s-1CRL\s0 path. This error can only |
| 356 | happen if extended \s-1CRL\s0 checking is enabled. |
| 357 | .IP "\fBX509_V_ERR_APPLICATION_VERIFICATION: application verification failure\fR" 4 |
| 358 | .IX Item "X509_V_ERR_APPLICATION_VERIFICATION: application verification failure" |
| 359 | an application specific error. This will never be returned unless explicitly |
| 360 | set by an application. |
| 361 | .SH "NOTES" |
| 362 | .IX Header "NOTES" |
| 363 | The above functions should be used instead of directly referencing the fields |
| 364 | in the \fBX509_VERIFY_CTX\fR structure. |
| 365 | .PP |
| 366 | In versions of OpenSSL before 1.0 the current certificate returned by |
| 367 | \&\fIX509_STORE_CTX_get_current_cert()\fR was never \fB\s-1NULL\s0\fR. Applications should |
| 368 | check the return value before printing out any debugging information relating |
| 369 | to the current certificate. |
| 370 | .PP |
| 371 | If an unrecognised error code is passed to \fIX509_verify_cert_error_string()\fR the |
| 372 | numerical value of the unknown code is returned in a static buffer. This is not |
| 373 | thread safe but will never happen unless an invalid code is passed. |
| 374 | .SH "SEE ALSO" |
| 375 | .IX Header "SEE ALSO" |
| 376 | \&\fIX509_verify_cert\fR\|(3) |
| 377 | .SH "HISTORY" |
| 378 | .IX Header "HISTORY" |
| 379 | \&\s-1TBA\s0 |
| 380 | .SH "POD ERRORS" |
| 381 | .IX Header "POD ERRORS" |
| 382 | Hey! \fBThe above document had some coding errors, which are explained below:\fR |
| 383 | .IP "Around line 281:" 4 |
| 384 | .IX Item "Around line 281:" |
| 385 | You forgot a '=back' before '=head1' |