
    ir                         d Z ddlZddlZddlZddlZddlZddlZddlm	Z	m
Z
  eh d          ZdZdZi Zd Zd Zd	edz  fd
Zd	efdZd	efdZd	efdZd	efdZddZd	edz  fdZd	efdZddZddZdS )z
Hermes Web UI -- Optional password authentication.
Off by default. Enable by setting HERMES_WEBUI_PASSWORD env var
or configuring a password in the Settings panel.
    N)	STATE_DIRload_settings>   /health/favicon.ico/api/auth/login/api/auth/status/loginhermes_sessioniQ c                     t           dz  } |                                 rC	 |                                 }t          |          dk    r
|dd         S n# t          $ r Y nw xY wt          j        d          }	 t          j        dd           |                     |           | 	                    d           n# t          $ r Y nw xY w|S )zIReturn a random signing key, generating and persisting one on first call.z.signing_key    NT)parentsexist_oki  )
r   exists
read_byteslen	Exceptionsecretstoken_bytesmkdirwrite_byteschmod)key_filerawkeys      %/home/ubuntu/hermes-webui/api/auth.py_signing_keyr      s    >)H 	%%''C3xx2~~3B3x  	 	 	D	 
b
!
!Ct4444S!!!u   Js$   0A 
AA7A B8 8
CCc                     t                      }t          j        d|                                 |d          }|                                S )aS  PBKDF2-SHA256 with 600k iterations (OWASP recommendation).
    Salt is the persisted random signing key, which is secret and unique per
    installation. This keeps the stored hash format a plain hex string
    (no format change to settings.json) while replacing the predictable
    STATE_DIR-derived salt from the original implementation.sha256i'	 )r   hashlibpbkdf2_hmacencodehex)passwordsaltdks      r   _hash_passwordr&   1   s:     >>D		Xx'8'8$	H	HB6688O    returnc                      t          j        dd                                          } | rt          |           S t	                      }|                    d          pdS )zdReturn the active password hash, or None if auth is disabled.
    Priority: env var > settings.json.HERMES_WEBUI_PASSWORD password_hashN)osgetenvstripr&   r   get)env_pwsettingss     r   get_password_hashr3   <   sX     Y.3399;;F &f%%%H<<((0D0r'   c                  "    t                      duS )z7True if a password is configured (env var or settings).N)r3    r'   r   is_auth_enabledr6   F   s    d**r'   c                 j    t                      }|sdS t          j        t          |           |          S )z4Verify a plaintext password against the stored hash.F)r3   hmaccompare_digestr&   )plainexpecteds     r   verify_passwordr<   K   s5     ""H u~e44h???r'   c                  .   t          j        d          } t          j                    t          z   t          | <   t          j        t                      |                                 t          j
                                                  dd         }|  d| S )z7Create a new auth session. Returns signed cookie value.r   N   .)r   	token_hextimeSESSION_TTL	_sessionsr8   newr   r!   r   r   	hexdigest)tokensigs     r   create_sessionrH   S   sr    b!!Ey{{[0Ie
(<>>5<<>>7>
B
B
L
L
N
NsPRs
SCcr'   c                    | rd| vrdS |                      dd          \  }}t          j        t                      |                                t
          j                                                  dd         }t          j        ||          sdS t          
                    |          }|rt          j                    |k    rt                              |d           dS dS )zFVerify a signed session cookie. Returns True if valid and not expired.r?   F   Nr>   T)rsplitr8   rD   r   r!   r   r   rE   r9   rC   r0   rA   pop)cookie_valuerF   rG   expected_sigexpirys        r   verify_sessionrP   [   s     3l22u$$S!,,JE38LNNELLNNGNKKUUWWX[Y[X[\LsL11 u]]5!!F TY[[6))eT"""u4r'   c                     | r=d| v r;|                      dd          d         }t                              |d           dS dS dS )zRemove a session token.r?   rJ   r   N)rK   rC   rL   )rM   rF   s     r   invalidate_sessionrR   j   sX     #|++##C++A.eT"""""# #++r'   c                 *   | j                             dd          }|sdS t          j                                        }	 |                    |           n# t          j        j        $ r Y dS w xY w|                    t                    }|r|j        ndS )z1Extract the auth cookie from the request headers.Cookier+   N)	headersr0   httpcookiesSimpleCookieloadCookieErrorCOOKIE_NAMEvalue)handlercookie_headercookiemorsels       r   parse_cookiera   q   s    O''"55M t\&&((FM""""<#   ttZZ$$F!+6<<t+s   A A-,A-c                 $   t                      sdS |j        t          v s|j                            d          rdS t	          |           }|rt          |          rdS |j                            d          rZ|                     d           |                     dd           |                                  | j	        
                    d           n?|                     d           |                     d	d
           |                                  dS )zCheck if request is authorized. Returns True if OK.
    If not authorized, sends 401 (API) or 302 redirect (page) and returns False.Tz/static/z/api/i  zContent-Typezapplication/jsons#   {"error":"Authentication required"}i.  Locationr	   F)r6   pathPUBLIC_PATHS
startswithra   rP   send_responsesend_headerend_headerswfilewrite)r]   parsed
cookie_vals      r   
check_authrn      s     t{l""fk&<&<Z&H&H"tg&&J nZ00 t{g&& c"""N,>???BCCCCc"""J1115r'   c                 `   t           j                                        }||t          <   d|t                   d<   d|t                   d<   d|t                   d<   t	          t
                    |t                   d<   |                     d|t                                                              d	S )
z$Set the auth cookie on the response.ThttponlyLaxsamesite/rd   max-age
Set-CookieN)rV   rW   rX   r[   strrB   rh   OutputString)r]   rM   r_   s      r   set_auth_cookierx      s    \&&((F&F;&*F;
#&+F;
#"%F;%(%5%5F;	"f[&9&F&F&H&HIIIIIr'   c                    t           j                                        }d|t          <   d|t                   d<   d|t                   d<   d|t                   d<   |                     d|t                                                              d	S )
z&Clear the auth cookie on the response.r+   Trp   rs   rd   0rt   ru   N)rV   rW   rX   r[   rh   rw   )r]   r_   s     r   clear_auth_cookier{      sy    \&&((FF;&*F;
#"%F;%(F;	"f[&9&F&F&H&HIIIIIr'   )r(   N)__doc__r   r8   http.cookiesrV   r-   r   rA   
api.configr   r   	frozensetre   r[   rB   rC   r   r&   rv   r3   boolr6   r<   rH   rP   rR   ra   rn   rx   r{   r5   r'   r   <module>r      s   
       				   / / / / / / / / y     
  	  *  13: 1 1 1 1+ + + + +
@d @ @ @ @    D    # # # #,S4Z , , , ,4    2J J J JJ J J J J Jr'   