U
    *}fT                     @   s  d dl mZmZm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
 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!k
r   dZ dd ZY nX zd dl"m#Z$ W n" e!k
r   d dl"m%Z$ Y nX dZ&dZ'dZ(dZ)dZ*dZ+dZ,e-dZ.dZ/dZ0dZ1dZ2dZ3dZ4dZ5dZ6e-e0d  e1 ej7Z8e9e:e;d!d"Z<ej=d#ej>dfej=d#ej?dfd$Z@e)e*e+d%ZAeBd&ZCeBd'ZDd(d) ZEe0d* e1d* fd+d,ZFd-d. ZGd/d0 ZHd1d2 ZId3d4 ZJd5d6 ZKd7d8 ZLd9d: ZMd;d< ZNG d=d> d>eOZPG d?d@ d@eOZQG dAdB dBeOZRG dCdD dDeOZSG dEdF dFeOZTe'eQ e(eR e&eT e)eSdGeU e*eSdHeV e+eSdIeW iZXdJdK ZYdTdLdMZZdUdNdOZ[dVdPdQZ\dRdS Z]dS )W    )absolute_importdivisionprint_functionN)utilsUnsupportedAlgorithm)_get_backend)dsaeced25519rsa)Cipher
algorithmsmodes)EncodingNoEncryptionPrivateFormatPublicFormat)kdfTFc                  O   s   t dd S )NzNeed bcrypt moduler   )argskwargs r   T/tmp/pip-unpacked-wheel-x36vw73o/cryptography/hazmat/primitives/serialization/ssh.py_bcrypt_kdf!   s    r   )encodebytes)encodestrings   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)Z	secp256r1Z	secp384r1Z	secp521r1s   >Is   >Qc                 C   s(   | j }|jtk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    r/   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,   Z	block_lenr   r   r   _check_block_sizea   s    r1   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    r3   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   )

ciphernamepasswordsaltroundsbackendalgoZkey_lenmodeZiv_lenseedr   r   r   _init_cipherm   s
    r=   c                 C   s6   t | dk rtdt| dd d | dd fS )ZUint32   Invalid dataNr   )r0   r%   _U32unpackr2   r   r   r   _get_u32w   s    rB   c                 C   s6   t | dk rtdt| dd d | dd fS )ZUint64   r?   Nr   )r0   r%   _U64rA   r2   r   r   r   _get_u64~   s    rE   c                 C   s8   t | \}} |t| kr td| d| | |d fS )zBytes with u32 length prefixr?   N)rB   r0   r%   )r,   nr   r   r   _get_sshstr   s    rG   c                 C   s8   t | \}} |r(t|ddkr(tdt|d| fS )zBig integer.r      r?   big)rG   six
indexbytesr%   r   Zint_from_bytes)r,   valr   r   r   
_get_mpint   s    rM   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)   rC   )r%   
bit_lengthr   Zint_to_bytes)rL   nbytesr   r   r   	_to_mpint   s    rP   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 N)flistextend)selfinitr   r   r   __init__   s    z_FragList.__init__c                 C   s   | j | dS )zAdd plain bytesN)rS   appendrU   rL   r   r   r   put_raw   s    z_FragList.put_rawc                 C   s   | j t| dS )zBig-endian uint32N)rS   rX   r@   packrY   r   r   r   put_u32   s    z_FragList.put_u32c                 C   sL   t |tttfr,| t| | j| n| |  | j	|j dS )zBytes prefixed with u32 lengthN)

isinstancebytes
memoryview	bytearrayr\   r0   rS   rX   sizerT   rY   r   r   r   
put_sshstr   s
    z_FragList.put_sshstrc                 C   s   |  t| dS )z*Big-endian bigint prefixed with u32 lengthN)rb   rP   rY   r   r   r   	put_mpint   s    z_FragList.put_mpintc                 C   s   t tt| jS )zCurrent number of bytes)summapr0   rS   )rU   r   r   r   ra      s    z_FragList.sizer   c                 C   s2   | j D ]&}t|}|||  }}||||< q|S )zWrite into bytearray)rS   r0   )rU   ZdstbufposfragZflenstartr   r   r   render   s
    
z_FragList.renderc                 C   s"   t t|  }| | | S )zReturn as bytes)r_   r`   ra   ri   tobytes)rU   bufr   r   r   rj      s    
z_FragList.tobytes)N)r   )__name__
__module____qualname____doc__rW   rZ   r\   rb   rc   ra   ri   rj   r   r   r   r   rQ      s   
	
rQ   c                   @   s8   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$   t |\}}t |\}}||f|fS )zRSA public fieldsrM   )rU   r,   erF   r   r   r   
get_public   s    z_SSHFormatRSA.get_publicc                 C   s0   |  |\\}}}t||}||}||fS )zMake RSA public key from data.)rs   r   RSAPublicNumbersr&   )rU   key_typer,   r9   rr   rF   public_numbersr&   r   r   r   load_public   s    
z_SSHFormatRSA.load_publicc              	   C   s   t |\}}t |\}}t |\}}t |\}}t |\}}t |\}	}||f|kr\tdt||}
t||	}t||}t||	||
|||}||}||fS )zMake RSA private key from data.z Corrupt data: rsa field mismatch)rM   r%   r   Zrsa_crt_dmp1Zrsa_crt_dmq1rt   ZRSAPrivateNumbersprivate_key)rU   r,   	pubfieldsr9   rF   rr   diqmppqZdmp1Zdmq1rv   private_numbersrx   r   r   r   load_private   s,          
z_SSHFormatRSA.load_privatec                 C   s$   |  }||j ||j dS )zWrite RSA public keyN)rv   rc   rr   rF   )rU   r&   f_pubZ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~   rv   rc   rF   rr   rz   r{   r|   r}   )rU   rx   f_privr~   rv   r   r   r   encode_private   s    z_SSHFormatRSA.encode_privateN	rl   rm   rn   ro   rs   rw   r   r   r   r   r   r   r   rp      s   rp   c                   @   s@   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 fieldsrq   )rU   r,   r|   r}   gyr   r   r   rs     s
    z_SSHFormatDSA.get_publicc                 C   sL   |  |\\}}}}}t|||}t||}	| |	 |	|}
|
|fS )zMake DSA public key from data.)rs   r	   DSAParameterNumbersDSAPublicNumbers	_validater&   )rU   ru   r,   r9   r|   r}   r   r   parameter_numbersrv   r&   r   r   r   rw     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)	rs   rM   r%   r	   r   r   r   ZDSAPrivateNumbersrx   )rU   r,   ry   r9   r|   r}   r   r   xr   rv   r~   rx   r   r   r   r   '  s    

z_SSHFormatDSA.load_privatec                 C   sL   |  }|j}| | ||j ||j ||j ||j dS )zWrite DSA public keyN)rv   r   r   rc   r|   r}   r   r   )rU   r&   r   rv   r   r   r   r   r   5  s    
z_SSHFormatDSA.encode_publicc                 C   s$   |  | | || j dS )zWrite DSA private keyN)r   r&   rc   r~   r   )rU   rx   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|   rN   r%   )rU   rv   r   r   r   r   r   E  s    z_SSHFormatDSA._validateN)
rl   rm   rn   ro   rs   rw   r   r   r   r   r   r   r   r   r     s   	r   c                   @   s@   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 )_SSHFormatECDSAzFormat for ECDSA keys.

    Public:
        str curve
        bytes point
    Private:
        str curve
        bytes point
        mpint secret
    c                 C   s   || _ || _d S rR   )ssh_curve_namer"   )rU   r   r"   r   r   r   rW   W  s    z_SSHFormatECDSA.__init__c                 C   sN   t |\}}t |\}}|| jkr*tdt|ddkrBtd||f|fS )zECDSA public fieldszCurve name mismatchr   r>   zNeed uncompressed point)rG   r   r%   rJ   rK   NotImplementedError)rU   r,   r"   pointr   r   r   rs   [  s    
z_SSHFormatECDSA.get_publicc                 C   s.   |  |\\}}}tj| j| }||fS )z Make ECDSA public key from data.)rs   r
   EllipticCurvePublicKeyZfrom_encoded_pointr"   rj   )rU   ru   r,   r9   
curve_namer   r&   r   r   r   rw   e  s     z_SSHFormatECDSA.load_publicc                 C   sJ   |  |\\}}}t|\}}||f|kr2tdt|| j|}||fS )z!Make ECDSA private key from data.z"Corrupt data: ecdsa field mismatch)rs   rM   r%   r
   Zderive_private_keyr"   )rU   r,   ry   r9   r   r   secretrx   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   ZX962r   ZUncompressedPointrb   r   )rU   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   rc   Zprivate_value)rU   rx   r   r&   r~   r   r   r   r     s    z_SSHFormatECDSA.encode_privateN)
rl   rm   rn   ro   rW   rs   rw   r   r   r   r   r   r   r   r   K  s   

r   c                   @   s8   e Zd ZdZdd Zdd Zdd Zdd	 Zd
d ZdS )_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)rG   )rU   r,   r   r   r   r   rs     s    z_SSHFormatEd25519.get_publicc                 C   s(   |  |\\}}tj| }||fS )z"Make Ed25519 public key from data.)rs   r   Ed25519PublicKeyZfrom_public_bytesrj   )rU   ru   r,   r9   r   r&   r   r   r   rw     s
    z_SSHFormatEd25519.load_publicc           	      C   sb   |  |\\}}t|\}}|dd }|dd }||ksF|f|krNtdtj|}||fS )z#Make Ed25519 private key from data.Nr!   z$Corrupt data: ed25519 field mismatch)rs   rG   r%   r   Ed25519PrivateKeyZfrom_private_bytes)	rU   r,   ry   r9   r   Zkeypairr   Zpoint2rx   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   rb   )rU   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&   Zprivate_bytesr   r   r   r   r   r   rQ   r   rb   )rU   rx   r   r&   Zraw_private_keyr   Z	f_keypairr   r   r   r     s       z _SSHFormatEd25519.encode_privateNr   r   r   r   r   r     s   	r   s   nistp256s   nistp384s   nistp521c                 C   s6   t | tst|  } | tkr&t|  S td|  dS )z"Return valid format or throw errorzUnsupported key type: %rN)r]   r^   r_   rj   _KEY_FORMATSr   )ru   r   r   r   _lookup_kformat  s
    
r   c                 C   sR  t d|  t|}|dk	r(t d| t| }|s>td|d}|d}t	
t| || } | tsztdt| ttd } t| \}} t| \}} t| \}} t| \}	} |	dkrtdt| \}
} t|
\}}
t|}||
\}}
t|
 t| \}} t|  ||fttfkr| }|tkrHtd| |tkr^t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rNtd|S )z.Load private key from OpenSSH custom encoding.r,   Nr6   zNot OpenSSH private key formatr   zOnly one key supportedzUnsupported cipher: %rzUnsupported KDF: %r   rC   zCorrupt data: broken checksumzCorrupt data: key type mismatchzCorrupt data: invalid padding)r   _check_bytesliker   _check_bytes_PEM_RCsearchr%   rh   endbinascii
a2b_base64r_   
startswith	_SK_MAGICr0   rG   rB   r   rs   r3   _NONErj   r4   r   _BCRYPTr1   r=   Z	decryptorupdater   _PADDING)r,   r6   r9   mp1p2r5   kdfnameZ
kdfoptionsnkeysZpubdataZpub_key_typekformatry   Zedatablklenr7   Zkbufr8   ciphZck1Zck2ru   rx   commentr   r   r   load_ssh_private_key  sv    






    


r   c                 C   s>  |dk	rt d| |r,t|tkr,tdt| tjrFt| 	 }n>t| t
jrXt}n,t| tjrjt}nt| tjr|t}ntdt|}t }|rt}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k	r|) *||| ||d  t+|d| }t'||||< |S )z3Serialize private key with OpenSSH custom encoding.Nr6   zNPasswords longer than 72 bytes are not supported by OpenSSH private key formatUnsupported key typer   r   rC   r   r>   r)   ),r   r   r0   _MAX_PASSWORDr%   r]   r
   ZEllipticCurvePrivateKeyr'   r&   r   ZRSAPrivateKey_SSH_RSAr	   ZDSAPrivateKey_SSH_DSAr   r   _SSH_ED25519r   rQ   _DEFAULT_CIPHERr4   r   _DEFAULT_ROUNDSosurandomrb   r\   r   r=   r   r   r   rZ   r   ra   r   r_   r`   ri   Z	encryptorZupdate_intor/   )rx   r6   ru   r   Zf_kdfoptionsr5   r   r   r8   r7   r9   r   r   Zcheckvalr   Zf_public_keyZ	f_secretsZf_mainslenmlenrk   Z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rrd}|dtt  }t	|}zt
t|} W n" ttjfk
r   tdY nX t| \}} ||krtd|rt| \}	} ||| |\}
} |rxt| \}} 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_SUFFIXr0   r   r_   r   r   	TypeErrorErrorrG   rw   rE   rB   r3   )r,   r9   r   ru   Zorig_key_typeZkey_bodyZ	with_certr   Zinner_key_typenoncer&   serialZcctypeZkey_idZ
principalsZvalid_afterZvalid_beforeZcrit_options
extensionsreservedZsig_key	signaturer   r   r   load_ssh_public_keym  sH    

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rLt}ntdt|}t }|| || | t|  }d|d|gS )z&One-line public key format for OpenSSHr   r)       )r]   r
   r   r'   r   ZRSAPublicKeyr   r	   ZDSAPublicKeyr   r   r   r   r%   r   rQ   rb   r   r   
b2a_base64rj   stripr*   )r&   ru   r   r   Zpubr   r   r   serialize_ssh_public_key  s    

r   )N)N)N)^
__future__r   r   r   r   r   restructrJ   Zcryptographyr   Zcryptography.exceptionsr   Zcryptography.hazmat.backendsr   Z)cryptography.hazmat.primitives.asymmetricr	   r
   r   r   Z&cryptography.hazmat.primitives.ciphersr   r   r   Z,cryptography.hazmat.primitives.serializationr   r   r   r   Zbcryptr   r   Z_bcrypt_supportedImportErrorbase64r   r+   r   r   r   r   Z_ECDSA_NISTP256Z_ECDSA_NISTP384Z_ECDSA_NISTP521r   compiler   r   Z	_SK_STARTZ_SK_ENDr   r   r   r   r   DOTALLr   r_   r`   ranger   ZAESZCTRZCBCr4   r$   Structr@   rD   r'   r/   r1   r3   r=   rB   rE   rG   rM   rP   objectrQ   rp   r   r   r   Z	SECP256R1Z	SECP384R1Z	SECP521R1r   r   r   r   r   r   r   r   r   r   <module>   s   





0>>=:      
	
J
O
+