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| Standards, Environments, and Macros | pam_dhkeys(5) |
| | pam_dhkeys - authentication Diffie-Hellman keys management module |
SYNOPSIS
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The pam_dhkeys.so.1 service module provides functionality to two PAM services: Secure RPC authentication and Secure RPC authentication token management.
Secure RPC authentication differs from regular unix authentication because NIS+ and other ONC RPCs use Secure RPC as the underlying security mechanism.
The following options may be passed to the module:
- debug
-
syslog(3C)debugging information at LOG_DEBUG level
- nowarn
- Turn off warning messages
Authentication Services
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If the user has Diffie-Hellman keys, pam_sm_authenticate() establishes secret keys for the user specified by the PAM_USER (equivalent to running keylogin(1)), using the authentication token found in the PAM_AUTHTOK item. Not being able to establish the secret keys results in an authentication error if the NIS+ repository is used to authenticate the user and the NIS+ table permissions
require secure RPC credentials to access the password field. If pam_sm_setcred() is called with PAM_ESTABLISH_CRED and the user's secure RPC credentials need to be established, these credentials are set. This is equivalent to running keylogin(1).
If the credentials could not be set and PAM_SILENT is not specified, a diagnostic message is displayed. If pam_setcred() is called with PAM_DELETE_CRED, the user's secure RPC credentials are unset. This is equivalent to
running keylogout(1).
PAM_REINITIALIZE_CRED and PAM_REFRESH_CRED are not supported and return PAM_IGNORE.
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Authentication Token Management
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The pam_sm_chauthtok() implementation checks whether the old login password decrypts the users secret keys. If it doesn't this module prompts the user for an old Secure RPC password and stores it in a pam data item called SUNW_OLDRPCPASS.
This data item can be used by the store module to effectively update the users secret keys.
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The authentication service returns the following values:
- PAM_SUCCESS
- Credentials set successfully.
- PAM_IGNORE
- Credentials not needed to access the password repository.
- PAM_USER_UNKNOWN
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PAM_USER is not set, or the user is unknown.
- PAM_AUTH_ERR
- No secret keys were set. PAM_AUTHTOK is not set, no credentials are present or there is a wrong password.
- PAM_BUF_ERR
- Module ran out of memory.
- PAM_SYSTEM_ERR
-
NIS+ subsystem failed .
The authentication token management returns the following values:
- PAM_SUCCESS
- Old rpc password is set in SUNW_OLDRPCPASS
- PAM_USER_UNKNOWN
- User in PAM_USER is unknown.
- PAM_AUTHTOK_ERR
- User did not provide a password that decrypts the secret keys.
- PAM_BUF_ERR
- Module ran out of memory.
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See attributes(5) for descriptions of the following attributes:
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
| Interface Stability | Evolving |
| MT Level | MT-Safe with exceptions |
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keylogin(1), keylogout(1), pam(3PAM), pam_authenticate(3PAM), pam_chauthtok(3PAM), pam_setcred(3PAM), pam_get_item(3PAM), pam_set_data(3PAM), pam_get_data(3PAM), syslog(3C), libpam(3LIB), pam.conf(4), attributes(5), pam_authtok_check(5), pam_authtok_get(5), pam_authtok_store(5), pam_passwd_auth(5), pam_unix(5), pam_unix_account(5), pam_unix_auth(5), pam_unix_session(5)
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