24.11.2 Public Keys and Certificates in an LDAP Directory

This example demonstrates adding a mail user’s public key and certificate to the LDAP directory. It assumes the mail user already exists in the LDAP directory. The key and certificate, and the LDAP entries where it belongs, are entered into an .ldif file named add-public-cert.ldif. All text is entered into the file as ASCII text except for the key and certificate information, which must be entered as Base64 encoded text.

dn: uid=JohnDoe,ou=People, o=demo.siroe.com,o=demo
changetype: modify
replace: usercertificate
usercertificate;binary:: MFU01JTUUxEjAQBgNVBAsT1zZ1NlcnZlcjMBoGA1UEAxMTydG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The ldapmodify command is used to add the public key and certificate to the LDAP directory:

# ldapmodify -a -h demo.siroe.com -D "cn=Directory Manager" -w mypasswd -v
 -f add-public-cert.ldif

The value of the certurl parameter in smime.conf specifies the location of the public keys and their certificates in the LDAP directory. For Example 2, certurl is set to:

certurl==ldap://demo.siroe.com:389/ou=people, o=demo.siroe.com, 
o=demo?userCertificate;binary?sub?