For SSHA Passwords needs Solaris a proper pam configuration, for SSH especially the section :
other auth requisite pam_authtok_get.so.1
other auth required pam_dhkeys.so.1
other auth required pam_unix_cred.so.1
other auth binding pam_unix_auth.so.1 server_policy
other auth required pam_ldap.so.1
Because there are some variations in the config between the Solaris versions, the best source for the right stack is
# man pam_ldap
Carsten