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5 .\" Manual: Linux-PAM Manual
6 .\" Source: Linux-PAM Manual
9 .TH "PAM_USERDB" "8" "08/15/2012" "Linux-PAM Manual" "Linux\-PAM Manual"
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170 pam_userdb \- PAM module to authenticate against a db database
173 .HP \w'\fBpam_userdb\&.so\fR\ 'u
174 \fBpam_userdb\&.so\fR db=\fI/path/database\fR [debug] [crypt=[crypt|none]] [icase] [dump] [try_first_pass] [use_first_pass] [unknown_ok] [key_only]
178 The pam_userdb module is used to verify a username/password pair against values stored in a Berkeley DB database\&. The database is indexed by the username, and the data fields corresponding to the username keys are the passwords\&.
181 \fBcrypt=[crypt|none]\fR
183 Indicates whether encrypted or plaintext passwords are stored in the database\&. If it is
184 \fBcrypt\fR, passwords should be stored in the database in
188 is selected, passwords should be stored in the database as plaintext\&.
191 \fBdb=\fR\fB\fI/path/database\fR\fR
194 \FC/path/database\F[]
195 database for performing lookup\&. There is no default; the module will return
197 if no database is provided\&.
202 Print debug information\&.
207 Dump all the entries in the database to the log\&. Don\'t do this by default!
212 Make the password verification to be case insensitive (ie when working with registration numbers and such)\&. Only works with plaintext password storage\&.
217 Use the authentication token previously obtained by another module that did the conversation with the application\&. If this token can not be obtained then the module will try to converse\&. This option can be used for stacking different modules that need to deal with the authentication tokens\&.
222 Use the authentication token previously obtained by another module that did the conversation with the application\&. If this token can not be obtained then the module will fail\&. This option can be used for stacking different modules that need to deal with the authentication tokens\&.
227 Do not return error when checking for a user that is not in the database\&. This can be used to stack more than one pam_userdb module that will check a username/password pair in more than a database\&.
232 The username and password are concatenated together in the database hash as \'username\-password\' with a random value\&. if the concatenation of the username and password with a dash in the middle returns any result, the user is valid\&. this is useful in cases where the username may not be unique but the username and password pair are\&.
234 .SH "MODULE TYPES PROVIDED"
240 module types are provided\&.
245 Authentication failure\&.
248 PAM_AUTHTOK_RECOVERY_ERR
250 Authentication information cannot be recovered\&.
255 Memory buffer error\&.
260 Conversation failure\&.
265 Error in service module\&.
275 User not known to the underlying authentication module\&.
288 .BB lightgray adjust-for-leading-newline
291 auth sufficient pam_userdb\&.so icase db=/etc/dbtest\&.db
293 .EB lightgray adjust-for-leading-newline
312 pam_userdb was written by Cristian Gafton >gafton@redhat\&.com<\&.