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"""
Module for Solaris' Role-Based Access Control
"""

import logging

import salt.utils.files
import salt.utils.path

log = logging.getLogger(__name__)

# Define the module's virtual name
__virtualname__ = "rbac"


def __virtual__():
    """
    Provides rbac if we are running on a solaris like system
    """
    if __grains__["kernel"] == "SunOS" and salt.utils.path.which("profiles"):
        return __virtualname__
    return (
        False,
        f"{__virtualname__} module can only be loaded on a solaris like system",
    )


def profile_list(default_only=False):
    """
    List all available profiles

    default_only : boolean
        return only default profile

    CLI Example:

    .. code-block:: bash

        salt '*' rbac.profile_list
    """
    profiles = {}
    default_profiles = ["All"]

    ## lookup default profile(s)
    with salt.utils.files.fopen("/etc/security/policy.conf", "r") as policy_conf:
        for policy in policy_conf:
            policy = salt.utils.stringutils.to_unicode(policy)
            policy = policy.split("=")
            if policy[0].strip() == "PROFS_GRANTED":
                default_profiles.extend(policy[1].strip().split(","))

    ## read prof_attr file (profname:res1:res2:desc:attr)
    with salt.utils.files.fopen("/etc/security/prof_attr", "r") as prof_attr:
        for profile in prof_attr:
            profile = salt.utils.stringutils.to_unicode(profile)
            profile = profile.split(":")

            # skip comments and non complaint lines
            if len(profile) != 5:
                continue

            # add profile info to dict
            profiles[profile[0]] = profile[3]

    ## filtered profiles
    if default_only:
        for p in [p for p in profiles if p not in default_profiles]:
            del profiles[p]

    return profiles


def profile_get(user, default_hidden=True):
    """
    List profiles for user

    user : string
        username
    default_hidden : boolean
        hide default profiles

    CLI Example:

    .. code-block:: bash

        salt '*' rbac.profile_get leo
        salt '*' rbac.profile_get leo default_hidden=False
    """
    user_profiles = []

    ## read user_attr file (user:qualifier:res1:res2:attr)
    with salt.utils.files.fopen("/etc/user_attr", "r") as user_attr:
        for profile in user_attr:
            profile = salt.utils.stringutils.to_unicode(profile)
            profile = profile.strip().split(":")

            # skip comments and non complaint lines
            if len(profile) != 5:
                continue

            # skip other users
            if profile[0] != user:
                continue

            # parse attr
            attrs = {}
            for attr in profile[4].strip().split(";"):
                attr_key, attr_val = attr.strip().split("=")
                if attr_key in ["auths", "profiles", "roles"]:
                    attrs[attr_key] = attr_val.strip().split(",")
                else:
                    attrs[attr_key] = attr_val
            if "profiles" in attrs:
                user_profiles.extend(attrs["profiles"])

    ## remove default profiles
    if default_hidden:
        for profile in profile_list(default_only=True):
            if profile in user_profiles:
                user_profiles.remove(profile)

    return list(set(user_profiles))


def profile_add(user, profile):
    """
    Add profile to user

    user : string
        username
    profile : string
        profile name

    CLI Example:

    .. code-block:: bash

        salt '*' rbac.profile_add martine 'Primary Administrator'
        salt '*' rbac.profile_add martine 'User Management,User Security'
    """
    ret = {}

    ## validate profiles
    profiles = profile.split(",")
    known_profiles = profile_list().keys()
    valid_profiles = [p for p in profiles if p in known_profiles]
    log.debug(
        "rbac.profile_add - profiles=%s, known_profiles=%s, valid_profiles=%s",
        profiles,
        known_profiles,
        valid_profiles,
    )

    ## update user profiles
    if valid_profiles:
        res = __salt__["cmd.run_all"](
            'usermod -P "{profiles}" {login}'.format(
                login=user,
                profiles=",".join(set(profile_get(user) + valid_profiles)),
            )
        )
        if res["retcode"] > 0:
            ret["Error"] = {
                "retcode": res["retcode"],
                "message": res["stderr"] if "stderr" in res else res["stdout"],
            }
            return ret

    ## update return value
    active_profiles = profile_get(user, False)
    for p in profiles:
        if p not in valid_profiles:
            ret[p] = "Unknown"
        elif p in active_profiles:
            ret[p] = "Added"
        else:
            ret[p] = "Failed"

    return ret


def profile_rm(user, profile):
    """
    Remove profile from user

    user : string
        username
    profile : string
        profile name

    CLI Example:

    .. code-block:: bash

        salt '*' rbac.profile_rm jorge 'Primary Administrator'
        salt '*' rbac.profile_rm jorge 'User Management,User Security'
    """
    ret = {}

    ## validate profiles
    profiles = profile.split(",")
    known_profiles = profile_list().keys()
    valid_profiles = [p for p in profiles if p in known_profiles]
    log.debug(
        "rbac.profile_rm - profiles=%s, known_profiles=%s, valid_profiles=%s",
        profiles,
        known_profiles,
        valid_profiles,
    )

    ## update user profiles
    if valid_profiles:
        res = __salt__["cmd.run_all"](
            'usermod -P "{profiles}" {login}'.format(
                login=user,
                profiles=",".join(
                    [p for p in profile_get(user) if p not in valid_profiles]
                ),
            )
        )
        if res["retcode"] > 0:
            ret["Error"] = {
                "retcode": res["retcode"],
                "message": res["stderr"] if "stderr" in res else res["stdout"],
            }
            return ret

    ## update return value
    active_profiles = profile_get(user, False)
    for p in profiles:
        if p not in valid_profiles:
            ret[p] = "Unknown"
        elif p in active_profiles:
            ret[p] = "Failed"
        else:
            ret[p] = "Remove"

    return ret


def role_list():
    """
    List all available roles

    CLI Example:

    .. code-block:: bash

        salt '*' rbac.role_list
    """
    roles = {}

    ## read user_attr file (user:qualifier:res1:res2:attr)
    with salt.utils.files.fopen("/etc/user_attr", "r") as user_attr:
        for role in user_attr:
            role = salt.utils.stringutils.to_unicode(role)
            role = role.split(":")

            # skip comments and non complaint lines
            if len(role) != 5:
                continue

            # parse attr
            attrs = {}
            for attr in role[4].split(";"):
                attr_key, attr_val = attr.split("=")
                if attr_key in ["auths", "profiles", "roles"]:
                    attrs[attr_key] = attr_val.split(",")
                else:
                    attrs[attr_key] = attr_val
            role[4] = attrs

            # add role info to dict
            if "type" in role[4] and role[4]["type"] == "role":
                del role[4]["type"]
                roles[role[0]] = role[4]

    return roles


def role_get(user):
    """
    List roles for user

    user : string
        username

    CLI Example:

    .. code-block:: bash

        salt '*' rbac.role_get leo
    """
    user_roles = []

    ## read user_attr file (user:qualifier:res1:res2:attr)
    with salt.utils.files.fopen("/etc/user_attr", "r") as user_attr:
        for role in user_attr:
            role = salt.utils.stringutils.to_unicode(role)
            role = role.strip().strip().split(":")

            # skip comments and non complaint lines
            if len(role) != 5:
                continue

            # skip other users
            if role[0] != user:
                continue

            # parse attr
            attrs = {}
            for attr in role[4].strip().split(";"):
                attr_key, attr_val = attr.strip().split("=")
                if attr_key in ["auths", "profiles", "roles"]:
                    attrs[attr_key] = attr_val.strip().split(",")
                else:
                    attrs[attr_key] = attr_val
            if "roles" in attrs:
                user_roles.extend(attrs["roles"])

    return list(set(user_roles))


def role_add(user, role):
    """
    Add role to user

    user : string
        username
    role : string
        role name

    CLI Example:

    .. code-block:: bash

        salt '*' rbac.role_add martine netcfg
        salt '*' rbac.role_add martine netcfg,zfssnap
    """
    ret = {}

    ## validate roles
    roles = role.split(",")
    known_roles = role_list().keys()
    valid_roles = [r for r in roles if r in known_roles]
    log.debug(
        "rbac.role_add - roles=%s, known_roles=%s, valid_roles=%s",
        roles,
        known_roles,
        valid_roles,
    )

    ## update user roles
    if valid_roles:
        res = __salt__["cmd.run_all"](
            'usermod -R "{roles}" {login}'.format(
                login=user,
                roles=",".join(set(role_get(user) + valid_roles)),
            )
        )
        if res["retcode"] > 0:
            ret["Error"] = {
                "retcode": res["retcode"],
                "message": res["stderr"] if "stderr" in res else res["stdout"],
            }
            return ret

    ## update return value
    active_roles = role_get(user)
    for r in roles:
        if r not in valid_roles:
            ret[r] = "Unknown"
        elif r in active_roles:
            ret[r] = "Added"
        else:
            ret[r] = "Failed"

    return ret


def role_rm(user, role):
    """
    Remove role from user

    user : string
        username
    role : string
        role name

    CLI Example:

    .. code-block:: bash

        salt '*' rbac.role_rm jorge netcfg
        salt '*' rbac.role_rm jorge netcfg,zfssnap
    """
    ret = {}

    ## validate roles
    roles = role.split(",")
    known_roles = role_list().keys()
    valid_roles = [r for r in roles if r in known_roles]
    log.debug(
        "rbac.role_rm - roles=%s, known_roles=%s, valid_roles=%s",
        roles,
        known_roles,
        valid_roles,
    )

    ## update user roles
    if valid_roles:
        res = __salt__["cmd.run_all"](
            'usermod -R "{roles}" {login}'.format(
                login=user,
                roles=",".join([r for r in role_get(user) if r not in valid_roles]),
            )
        )
        if res["retcode"] > 0:
            ret["Error"] = {
                "retcode": res["retcode"],
                "message": res["stderr"] if "stderr" in res else res["stdout"],
            }
            return ret

    ## update return value
    active_roles = role_get(user)
    for r in roles:
        if r not in valid_roles:
            ret[r] = "Unknown"
        elif r in active_roles:
            ret[r] = "Failed"
        else:
            ret[r] = "Remove"

    return ret


def auth_list():
    """
    List all available authorization

    CLI Example:

    .. code-block:: bash

        salt '*' rbac.auth_list
    """
    auths = {}

    ## read auth_attr file (name:res1:res2:short_desc:long_desc:attr)
    with salt.utils.files.fopen("/etc/security/auth_attr", "r") as auth_attr:
        for auth in auth_attr:
            auth = salt.utils.stringutils.to_unicode(auth)
            auth = auth.split(":")

            # skip comments and non complaint lines
            if len(auth) != 6:
                continue

            # add auth info to dict
            if auth[0][-1:] == ".":
                auth[0] = f"{auth[0]}*"
            auths[auth[0]] = auth[3]

    return auths


def auth_get(user, computed=True):
    """
    List authorization for user

    user : string
        username
    computed : boolean
        merge results from `auths` command into data from user_attr

    CLI Example:

    .. code-block:: bash

        salt '*' rbac.auth_get leo
    """
    user_auths = []

    ## read user_attr file (user:qualifier:res1:res2:attr)
    with salt.utils.files.fopen("/etc/user_attr", "r") as user_attr:
        for auth in user_attr:
            auth = salt.utils.stringutils.to_unicode(auth)
            auth = auth.strip().split(":")

            # skip comments and non complaint lines
            if len(auth) != 5:
                continue

            # skip other users
            if auth[0] != user:
                continue

            # parse attr
            attrs = {}
            for attr in auth[4].strip().split(";"):
                attr_key, attr_val = attr.strip().split("=")
                if attr_key in ["auths", "profiles", "roles"]:
                    attrs[attr_key] = attr_val.strip().split(",")
                else:
                    attrs[attr_key] = attr_val
            if "auths" in attrs:
                user_auths.extend(attrs["auths"])

    ## also parse auths command
    if computed:
        res = __salt__["cmd.run_all"](f"auths {user}")
        if res["retcode"] == 0:
            for auth in res["stdout"].splitlines():
                if "," in auth:
                    user_auths.extend(auth.strip().split(","))
                else:
                    user_auths.append(auth.strip())

    return list(set(user_auths))


def auth_add(user, auth):
    """
    Add authorization to user

    user : string
        username
    auth : string
        authorization name

    CLI Example:

    .. code-block:: bash

        salt '*' rbac.auth_add martine solaris.zone.manage
        salt '*' rbac.auth_add martine solaris.zone.manage,solaris.mail.mailq
    """
    ret = {}

    ## validate auths
    auths = auth.split(",")
    known_auths = auth_list().keys()
    valid_auths = [r for r in auths if r in known_auths]
    log.debug(
        "rbac.auth_add - auths=%s, known_auths=%s, valid_auths=%s",
        auths,
        known_auths,
        valid_auths,
    )

    ## update user auths
    if valid_auths:
        res = __salt__["cmd.run_all"](
            'usermod -A "{auths}" {login}'.format(
                login=user,
                auths=",".join(set(auth_get(user, False) + valid_auths)),
            )
        )
        if res["retcode"] > 0:
            ret["Error"] = {
                "retcode": res["retcode"],
                "message": res["stderr"] if "stderr" in res else res["stdout"],
            }
            return ret

    ## update return value
    active_auths = auth_get(user, False)
    for a in auths:
        if a not in valid_auths:
            ret[a] = "Unknown"
        elif a in active_auths:
            ret[a] = "Added"
        else:
            ret[a] = "Failed"

    return ret


def auth_rm(user, auth):
    """
    Remove authorization from user

    user : string
        username
    auth : string
        authorization name

    CLI Example:

    .. code-block:: bash

        salt '*' rbac.auth_rm jorge solaris.zone.manage
        salt '*' rbac.auth_rm jorge solaris.zone.manage,solaris.mail.mailq
    """
    ret = {}

    ## validate auths
    auths = auth.split(",")
    known_auths = auth_list().keys()
    valid_auths = [a for a in auths if a in known_auths]
    log.debug(
        "rbac.auth_rm - auths=%s, known_auths=%s, valid_auths=%s",
        auths,
        known_auths,
        valid_auths,
    )

    ## update user auths
    if valid_auths:
        res = __salt__["cmd.run_all"](
            'usermod -A "{auths}" {login}'.format(
                login=user,
                auths=",".join(
                    [a for a in auth_get(user, False) if a not in valid_auths]
                ),
            )
        )
        if res["retcode"] > 0:
            ret["Error"] = {
                "retcode": res["retcode"],
                "message": res["stderr"] if "stderr" in res else res["stdout"],
            }
            return ret

    ## update return value
    active_auths = auth_get(user, False)
    for a in auths:
        if a not in valid_auths:
            ret[a] = "Unknown"
        elif a in active_auths:
            ret[a] = "Failed"
        else:
            ret[a] = "Remove"

    return ret