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The map file specifies which certificates authorize logging into which accounts. The format of the file is as follows:
<account-id> <keyword> <argument>
The keyword can be either Email, Subject, SerialAndIssuer, EmailRegex, or SubjectRegex. The argument depends on the keyword.
Email: The argument is the e-mail address which must be present in the certificate.Subject: The argument is the required subject name in LDAP DN (distinguished name) string format.SerialAndIssuer: The argument is the required serial number and issuer name in LDAP DN string format, separated by spaces or tabs.EmailRegex: The argument is the regular expression which must match an e-mail address in the certificate. Ifaccount-idcontains the string%subst%, it is substituted with the first parenthesized part of the regular expression. The patterns are matched using the egrep syntax.SubjectRegex: The argument is the regular expression which must match a subject name in the certificate. Ifaccount-idcontains the string%subst%, it is substituted with the first parenthesized part of the regular expression. The patterns are matched using the egrep syntax.
The following are examples of different map file definitions:
user1 email user1@ssh.com user1 subject C=FI,O=SSH,CN=Secure Shell User 1 user1 serialandissuer 1234 C=FI,O=SSH,CN=Secure Shell User 1 %subst% subjectregex C=FI, O=SSH, CN=([a-z]+) %subst% emailregex ([a-z]+)@ssh\.com
The last line permits logging with any e-mail address with only letters in the user name. For more information on the regular expression syntax, see sshregex.
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2014 SSH Communications Security Corporation
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