o
    )%aW                     @   s.  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 d dlm	Z	 d dl
mZ d dlmZ d dlmZmZmZmZ d dlmZmZmZ d dlmZmZmZmZ z
d d	lmZ d
ZW n e yv   dZ	d[de!de!de"de"de#de!fddZY nw dZ$dZ%dZ&dZ'dZ(dZ)dZ*e+dZ,dZ-dZ.dZ/dZ0d Z1d!Z2d"Z3d#Z4e+e.d$ e/ ej5Z6e7e8e9d%d&Z:ej;d'ej<d"fej;d'ej=d"fd(Z>e'e(e)d)Z?e@d*ZAe@d+ZBd,d- ZCe.d. e/d. fd/d0ZDd1d2 ZEd3d4 ZFd5d6 ZGd7d8 ZHd9d: ZId;d< ZJd=d> ZKd?d@ ZLG dAdB dBeMZNG dCdD dDeMZOG dEdF dFeMZPG dGdH dHeMZQG dIdJ dJeMZRe%eO e&eP e$eR e'eQdKeS e(eQdLeT e)eQdMeU iZVdNdO ZWejXejYejZej[ej\f Z]	d\dPe!dej^e! de]fdQdRZ_	d\dSe]dej^e! fdTdUZ`ejXejaejbejcejdf Zed\dPe!deefdVdWZfdXeede!fdYdZZgdS )]    N)encodebytes)utilsUnsupportedAlgorithm)_get_backend)dsaeced25519rsa)Cipher
algorithmsmodes)EncodingNoEncryptionPrivateFormatPublicFormat)kdfTFpasswordsaltdesired_key_bytesroundsignore_few_roundsreturnc                 C   s   t d)NzNeed bcrypt moduler   )r   r   r   r   r    r   R/usr/lib/python3/dist-packages/cryptography/hazmat/primitives/serialization/ssh.py_bcrypt_kdf    s   r   s   ssh-ed25519s   ssh-rsas   ssh-dsss   ecdsa-sha2-nistp256s   ecdsa-sha2-nistp384s   ecdsa-sha2-nistp521s   -cert-v01@openssh.coms   \A(\S+)[ \t]+(\S+)s   openssh-key-v1 s#   -----BEGIN OPENSSH PRIVATE KEY-----s!   -----END OPENSSH PRIVATE KEY-----s   bcrypts   none
   aes256-ctr   H   s   (.*?)          )r   s
   aes256-cbc)	secp256r1	secp384r1	secp521r1s   >Is   >Qc                 C   s(   | j }|jtvrtd|j t|j S )z3Return SSH key_type and curve_name for private key.z)Unsupported curve for ssh private key: %r)curvename_ECDSA_KEY_TYPE
ValueError)
public_keyr%   r   r   r   _ecdsa_key_typeS   s   

r*      
c                 C   s   d |t| |gS )N    )join_base64_encode)dataprefixsuffixr   r   r   _ssh_pem_encode]   s   r2   c                 C   s    | r
t | | dkrtddS )zRequire data to be full blocksr   zCorrupt data: missing paddingN)lenr(   )r/   	block_lenr   r   r   _check_block_sizea   s   r5   c                 C   s   | rt ddS )z!All data should have been parsed.zCorrupt data: unparsed dataN)r(   r/   r   r   r   _check_emptyg   s   r7   c           
      C   sT   |st dt|  \}}}}t|||| |d}	t||	d| ||	|d |S )z$Generate key + iv and return cipher.zKey is password-protected.TN)r(   _SSH_CIPHERSr   r   )

ciphernamer   r   r   backendalgokey_lenmodeiv_lenseedr   r   r   _init_cipherm   s
   $r@   c                 C   6   t | dk r
tdt| dd d | dd fS )Uint32   Invalid dataNr   )r3   r(   _U32unpackr6   r   r   r   _get_u32w      "rG   c                 C   rA   )Uint64   rD   Nr   )r3   r(   _U64rF   r6   r   r   r   _get_u64~   rH   rL   c                 C   s8   t | \}} |t| krtd| d| | |d fS )zBytes with u32 length prefixrD   N)rG   r3   r(   )r/   nr   r   r   _get_sshstr   s   rN   c                 C   s4   t | \}} |r|d dkrtdt|d| fS )zBig integer.r      rD   big)rN   r(   int
from_bytes)r/   valr   r   r   
_get_mpint   s   rT   c                 C   s4   | dk rt d| sdS |  d d }t| |S )z!Storage format for signed bigint.r   znegative mpint not allowedr,   rJ   )r(   
bit_lengthr   int_to_bytes)rS   nbytesr   r   r   	_to_mpint   s   rX   c                   @   sT   e Zd ZdZdddZdd Zdd Zd	d
 Zdd Zdd Z	dddZ
dd ZdS )	_FragListz,Build recursive structure without data copy.Nc                 C   s   g | _ |r| j | d S d S N)flistextend)selfinitr   r   r   __init__   s   z_FragList.__init__c                 C   s   | j | dS )zAdd plain bytesN)r[   appendr]   rS   r   r   r   put_raw      z_FragList.put_rawc                 C   s   | j t| dS )zBig-endian uint32N)r[   r`   rE   packra   r   r   r   put_u32   s   z_FragList.put_u32c                 C   sN   t |tttfr| t| | j| dS | |  | j	|j dS )zBytes prefixed with u32 lengthN)

isinstancebytes
memoryview	bytearrayre   r3   r[   r`   sizer\   ra   r   r   r   
put_sshstr   s
   z_FragList.put_sshstrc                 C   s   |  t| dS )z*Big-endian bigint prefixed with u32 lengthN)rk   rX   ra   r   r   r   	put_mpint   s   z_FragList.put_mpintc                 C   s   t tt| jS )zCurrent number of bytes)summapr3   r[   )r]   r   r   r   rj      rc   z_FragList.sizer   c                 C   s2   | j D ]}t|}||| }}||||< q|S )zWrite into bytearray)r[   r3   )r]   dstbufposfragflenstartr   r   r   render   s
   
z_FragList.renderc                 C   s"   t t|  }| | | S )zReturn as bytes)rh   ri   rj   rt   tobytes)r]   bufr   r   r   ru      s   
z_FragList.tobytesrZ   )r   )__name__
__module____qualname____doc__r_   rb   re   rk   rl   rj   rt   ru   r   r   r   r   rY      s    
	
rY   c                   @   8   e Zd ZdZdd Zdd Zdd Zdd	 Zd
d ZdS )_SSHFormatRSAzhFormat for RSA keys.

    Public:
        mpint e, n
    Private:
        mpint n, e, d, iqmp, p, q
    c                 C   s$   t |\}}t |\}}||f|fS )zRSA public fieldsrT   )r]   r/   erM   r   r   r   
get_public   s   z_SSHFormatRSA.get_publicc                 C   s0   |  |\\}}}t||}||}||fS )zMake RSA public key from data.)r   r
   RSAPublicNumbersr)   )r]   key_typer/   r:   r~   rM   public_numbersr)   r   r   r   load_public   s   
z_SSHFormatRSA.load_publicc              	   C   s   t |\}}t |\}}t |\}}t |\}}t |\}}t |\}	}||f|kr.tdt||}
t||	}t||}t||	||
|||}||}||fS )zMake RSA private key from data.z Corrupt data: rsa field mismatch)rT   r(   r
   rsa_crt_dmp1rsa_crt_dmq1r   RSAPrivateNumbersprivate_key)r]   r/   	pubfieldsr:   rM   r~   diqmppqdmp1dmq1r   private_numbersr   r   r   r   load_private   s    
z_SSHFormatRSA.load_privatec                 C   s$   |  }||j ||j dS )zWrite RSA public keyN)r   rl   r~   rM   )r]   r)   f_pubpubnr   r   r   encode_public   s   z_SSHFormatRSA.encode_publicc                 C   sZ   |  }|j}||j ||j ||j ||j ||j ||j dS )zWrite RSA private keyN)	r   r   rl   rM   r~   r   r   r   r   )r]   r   f_privr   r   r   r   r   encode_private   s   z_SSHFormatRSA.encode_privateN	rw   rx   ry   rz   r   r   r   r   r   r   r   r   r   r|      s    r|   c                   @   @   e Zd ZdZdd Zdd Zdd Zdd	 Zd
d Zdd Z	dS )_SSHFormatDSAzhFormat for DSA keys.

    Public:
        mpint p, q, g, y
    Private:
        mpint p, q, g, y, x
    c                 C   s@   t |\}}t |\}}t |\}}t |\}}||||f|fS )zDSA public fieldsr}   )r]   r/   r   r   gyr   r   r   r     s
   z_SSHFormatDSA.get_publicc                 C   sL   |  |\\}}}}}t|||}t||}	| |	 |	|}
|
|fS )zMake DSA public key from data.)r   r   DSAParameterNumbersDSAPublicNumbers	_validater)   )r]   r   r/   r:   r   r   r   r   parameter_numbersr   r)   r   r   r   r     s   

z_SSHFormatDSA.load_publicc                 C   s|   |  |\\}}}}}t|\}}||||f|krtdt|||}	t||	}
| |
 t||
}||}||fS )zMake DSA private key from data.z Corrupt data: dsa field mismatch)	r   rT   r(   r   r   r   r   DSAPrivateNumbersr   )r]   r/   r   r:   r   r   r   r   xr   r   r   r   r   r   r   r   '  s   

z_SSHFormatDSA.load_privatec                 C   sL   |  }|j}| | ||j ||j ||j ||j dS )zWrite DSA public keyN)r   r   r   rl   r   r   r   r   )r]   r)   r   r   r   r   r   r   r   5  s   
z_SSHFormatDSA.encode_publicc                 C   s$   |  | | || j dS )zWrite DSA private keyN)r   r)   rl   r   r   )r]   r   r   r   r   r   r   @  s   z_SSHFormatDSA.encode_privatec                 C   s    |j }|j dkrtdd S )Ni   z#SSH supports only 1024 bit DSA keys)r   r   rU   r(   )r]   r   r   r   r   r   r   E  s   z_SSHFormatDSA._validateN)
rw   rx   ry   rz   r   r   r   r   r   r   r   r   r   r   r     s    	r   c                   @   r   )_SSHFormatECDSAzFormat for ECDSA keys.

    Public:
        str curve
        bytes point
    Private:
        str curve
        bytes point
        mpint secret
    c                 C   s   || _ || _d S rZ   )ssh_curve_namer%   )r]   r   r%   r   r   r   r_   W  s   
z_SSHFormatECDSA.__init__c                 C   sJ   t |\}}t |\}}|| jkrtd|d dkrtd||f|fS )zECDSA public fieldszCurve name mismatchr   rC   zNeed uncompressed point)rN   r   r(   NotImplementedError)r]   r/   r%   pointr   r   r   r   [  s   
z_SSHFormatECDSA.get_publicc                 C   s.   |  |\\}}}tj| j| }||fS )z Make ECDSA public key from data.)r   r   EllipticCurvePublicKeyfrom_encoded_pointr%   ru   )r]   r   r/   r:   
curve_namer   r)   r   r   r   r   e  s
   
z_SSHFormatECDSA.load_publicc                 C   sJ   |  |\\}}}t|\}}||f|krtdt|| j|}||fS )z!Make ECDSA private key from data.z"Corrupt data: ecdsa field mismatch)r   rT   r(   r   derive_private_keyr%   )r]   r/   r   r:   r   r   secretr   r   r   r   r   m  s   z_SSHFormatECDSA.load_privatec                 C   s*   | tjtj}|| j || dS )zWrite ECDSA public keyN)public_bytesr   X962r   UncompressedPointrk   r   )r]   r)   r   r   r   r   r   r   w  s
   z_SSHFormatECDSA.encode_publicc                 C   s,   |  }| }| || ||j dS )zWrite ECDSA private keyN)r)   r   r   rl   private_value)r]   r   r   r)   r   r   r   r   r     s   z_SSHFormatECDSA.encode_privateN)
rw   rx   ry   rz   r_   r   r   r   r   r   r   r   r   r   r   K  s    

r   c                   @   r{   )_SSHFormatEd25519z~Format for Ed25519 keys.

    Public:
        bytes point
    Private:
        bytes point
        bytes secret_and_point
    c                 C   s   t |\}}|f|fS )zEd25519 public fields)rN   )r]   r/   r   r   r   r   r     s   
z_SSHFormatEd25519.get_publicc                 C   s(   |  |\\}}tj| }||fS )z"Make Ed25519 public key from data.)r   r	   Ed25519PublicKeyfrom_public_bytesru   )r]   r   r/   r:   r   r)   r   r   r   r     s
   z_SSHFormatEd25519.load_publicc           	      C   sb   |  |\\}}t|\}}|dd }|dd }||ks#|f|kr'tdtj|}||fS )z#Make Ed25519 private key from data.Nr!   z$Corrupt data: ed25519 field mismatch)r   rN   r(   r	   Ed25519PrivateKeyfrom_private_bytes)	r]   r/   r   r:   r   keypairr   point2r   r   r   r   r     s   z_SSHFormatEd25519.load_privatec                 C   s   | tjtj}|| dS )zWrite Ed25519 public keyN)r   r   Rawr   rk   )r]   r)   r   raw_public_keyr   r   r   r     s   z_SSHFormatEd25519.encode_publicc                 C   sR   |  }|tjtjt }|tjtj}t||g}| 	|| |
| dS )zWrite Ed25519 private keyN)r)   private_bytesr   r   r   r   r   r   rY   r   rk   )r]   r   r   r)   raw_private_keyr   	f_keypairr   r   r   r     s   z _SSHFormatEd25519.encode_privateNr   r   r   r   r   r     s    	r   s   nistp256s   nistp384s   nistp521c                 C   s2   t | tst|  } | tv rt|  S td|  )z"Return valid format or throw errorzUnsupported key type: %r)rf   rg   rh   ru   _KEY_FORMATSr   )r   r   r   r   _lookup_kformat  s
   
r   r/   c                 C   sJ  t d|  t|}|durt d| t| }|std|d}|d}t	
t| || } | ts=tdt| ttd } t| \}} t| \}} t| \}} t| \}	} |	dkrgtdt| \}
} t|
\}}
t|}||
\}}
t|
 t| \}} t|  ||fttfkr| }|tvrtd| |tkrtd| t| d	 }t|| t|\}}t|\}}t| t||| ||}t| |}nd
}t|| t|\}}t|\}}||krtdt|\}}||krtd||||\}}t|\}}|tdt| kr#td|S )z.Load private key from OpenSSH custom encoding.r/   Nr   zNot OpenSSH private key formatr   zOnly one key supportedzUnsupported cipher: %rzUnsupported KDF: %r   rJ   zCorrupt data: broken checksumzCorrupt data: key type mismatchzCorrupt data: invalid padding)r   _check_bytesliker   _check_bytes_PEM_RCsearchr(   rs   endbinascii
a2b_base64rh   
startswith	_SK_MAGICr3   rN   rG   r   r   r7   _NONEru   r8   r   _BCRYPTr5   r@   	decryptorupdater   _PADDING)r/   r   r:   mp1p2r9   kdfname
kdfoptionsnkeyspubdatapub_key_typekformatr   edatablklenr   kbufr   ciphck1ck2r   r   commentr   r   r   load_ssh_private_key  sn   






r   r   c                 C   s>  |dur
t d| |rt|tkrtdt| tjr#t| 	 }nt| t
jr,t}nt| tjr5t}nt| tjr>t}ntdt|}t }|rst}t| d }t}t}td}	||	 || td}
t|||	||
}nt }}d}d}d}td	}d
}t }|| | | 	 | t||g}|| |!| | || |"t#d||$ |    t }|"t% || || || || || || |$ }|$ }t&t'|| }|(| || }|dur|) *||| ||d  t+|d| }t'||||< |S )z3Serialize private key with OpenSSH custom encoding.Nr   zNPasswords longer than 72 bytes are not supported by OpenSSH private key formatUnsupported key typer   r   rJ   r   rC   r,   ),r   r   r3   _MAX_PASSWORDr(   rf   r   EllipticCurvePrivateKeyr*   r)   r
   RSAPrivateKey_SSH_RSAr   DSAPrivateKey_SSH_DSAr	   r   _SSH_ED25519r   rY   _DEFAULT_CIPHERr8   r   _DEFAULT_ROUNDSosurandomrk   re   r   r@   r   r   r   rb   r   rj   r   rh   ri   rt   	encryptorupdate_intor2   )r   r   r   r   f_kdfoptionsr9   r   r   r   r   r:   r   r   checkvalr   f_public_key	f_secretsf_mainslenmlenrv   ofstxtr   r   r   serialize_ssh_private_key(  sv   















 r   c              	   C   s|  t |}td|  t| }|std|d }}|d}d}t|tt d kr9d}|dtt  }t	|}z	t
t|} W n ttjfyT   tdw t| \}} ||krctd|rkt| \}	} ||| |\}
} |rt| \}} t| \}} t| \}} t| \}} t| \}} t| \}} t| \}} t| \}} t| \}} t| \}} t| \}} t|  |
S )	z-Load public key from OpenSSH one-line format.r/   zInvalid line formatr      FNTzInvalid key format)r   r   r   _SSH_PUBKEY_RCmatchr(   group_CERT_SUFFIXr3   r   rh   r   r   	TypeErrorErrorrN   r   rL   rG   r7   )r/   r:   r   r   orig_key_typekey_body	with_certr   inner_key_typenoncer)   serialcctypekey_id
principalsvalid_aftervalid_beforecrit_options
extensionsreservedsig_key	signaturer   r   r   load_ssh_public_key  sJ   

r  r)   c                 C   s   t | tjrt| }nt | tjrt}nt | tjrt	}nt | t
jr&t}ntdt|}t }|| || | t|  }d|d|gS )z&One-line public key format for OpenSSHr   r,       )rf   r   r   r*   r
   RSAPublicKeyr   r   DSAPublicKeyr   r	   r   r   r(   r   rY   rk   r   r   
b2a_base64ru   stripr-   )r)   r   r   r   pubr   r   r   serialize_ssh_public_key  s   

r  )FrZ   )hr   r   restructtypingbase64r   r.   cryptographyr   cryptography.exceptionsr   cryptography.hazmat.backendsr   )cryptography.hazmat.primitives.asymmetricr   r   r	   r
   &cryptography.hazmat.primitives.ciphersr   r   r   ,cryptography.hazmat.primitives.serializationr   r   r   r   bcryptr   r   _bcrypt_supportedImportErrorrg   rQ   boolr   r   r   _ECDSA_NISTP256_ECDSA_NISTP384_ECDSA_NISTP521r   compiler   r   	_SK_START_SK_ENDr   r   r   r   r   DOTALLr   rh   ri   ranger   AESCTRCBCr8   r'   StructrE   rK   r*   r2   r5   r7   r@   rG   rL   rN   rT   rX   objectrY   r|   r   r   r   	SECP256R1	SECP384R1	SECP521R1r   r   Unionr   r   r   r   _SSH_PRIVATE_KEY_TYPESOptionalr   r   r   r  r  r   _SSH_PUBLIC_KEY_TYPESr  r  r   r   r   r   <module>   s   





0>>=:
		
N
U+