8tc"VddlTddlmZmZmZmZddlmZmZm Z ddgZ d dZ d dZ dS) )*)DerNull DerSequence DerObjectIdDerOctetString)PBES1PBES2 PbesErrorwrapunwrapNc@|t}tdtt||gt|g}|}||S|st dt |}|d}tj|||||S)a Wrap a private key into a PKCS#8 blob (clear or encrypted). Args: private_key (byte string): The private key encoded in binary form. The actual encoding is algorithm specific. In most cases, it is DER. key_oid (string): The object identifier (OID) of the private key to wrap. It is a dotted string, like ``1.2.840.113549.1.1.1`` (for RSA keys). passphrase (bytes string or string): The secret passphrase from which the wrapping key is derived. Set it only if encryption is required. protection (string): The identifier of the algorithm to use for securely wrapping the key. The default value is ``PBKDF2WithHMAC-SHA1AndDES-EDE3-CBC``. prot_params (dictionary): Parameters for the protection algorithm. +------------------+-----------------------------------------------+ | Key | Description | +==================+===============================================+ | iteration_count | The KDF algorithm is repeated several times to| | | slow down brute force attacks on passwords | | | (called *N* or CPU/memory cost in scrypt). | | | The default value for PBKDF2 is 1000. | | | The default value for scrypt is 16384. | +------------------+-----------------------------------------------+ | salt_size | Salt is used to thwart dictionary and rainbow | | | attacks on passwords. The default value is 8 | | | bytes. | +------------------+-----------------------------------------------+ | block_size | *(scrypt only)* Memory-cost (r). The default | | | value is 8. | +------------------+-----------------------------------------------+ | parallelization | *(scrypt only)* CPU-cost (p). The default | | | value is 1. | +------------------+-----------------------------------------------+ key_params (DER object): The algorithm parameters associated to the private key. It is required for algorithms like DSA, but not for others like RSA. randfunc (callable): Random number generation function; it should accept a single integer N and return a string of random data, N bytes long. If not specified, a new RNG will be instantiated from :mod:`Cryptodome.Random`. Return: The PKCS#8-wrapped private key (possibly encrypted), as a byte string. NrzEmpty passphrasez"PBKDF2WithHMAC-SHA1AndDES-EDE3-CBC) rrrrencode ValueErrortobytesr encrypt) private_keykey_oid passphrase protection prot_params key_paramsrandfuncpk_info pk_info_ders 5/usr/lib/python3/dist-packages/Cryptodome/IO/PKCS8.pyr r 2svYY (({++ G..""K -+,,,$$J9 =j#[( < <<c |rt|}d} tj||}d}n6#t$r}dt |z}Yd}~nd}~wt $rd}YnwxYw|sU t j||}d}n<#t$r}|dt |zz }Yd}~nd}~wt $r|dz }YnwxYw|st d|zt|d }t|d kr|st d |d d krt dt|dd }t|d j }t|dkrd}n: t|dd}n#|d}YnxYwt|d j} || |fS)aHUnwrap a private key from a PKCS#8 blob (clear or encrypted). Args: p8_private_key (byte string): The private key wrapped into a PKCS#8 blob, DER encoded. passphrase (byte string or string): The passphrase to use to decrypt the blob (if it is encrypted). Return: A tuple containing #. the algorithm identifier of the wrapped key (OID, dotted string) #. the private key (byte string, DER encoded) #. the associated parameters (byte string, DER encoded) or ``None`` Raises: ValueError : if decoding fails FTz PBES1[%s]NzPBES1[Invalid]z ,PBES2[%s]z,PBES2[Invalid]zError decoding PKCS#8 (%s))) nr_elementsrz;Not a valid clear PKCS#8 structure (maybe it is encrypted?)rz#Not a valid PrivateKeyInfo SEQUENCE)r"r)rrdecryptr strrr rdecodelenrvaluerrpayload) p8_private_keyrfounde error_strralgoalgo_oid algo_paramsrs rr r s_(GZ((  )"]>:FFNEE - - -#c!ff,IIIIII ) ) )(III ) / /!&~z!J!J 3 3 3\CFF22  / / /..  / G9IEFF Fmm"">y"IIG 7||q455 5qzQ>??? ==     ? ?D}}##DG,,2H 4yyA~~  " II  T!W % % %KK "q'KKK!""))'!*55=K k; //sD- A AA A &A>> B7B""B76B7)G G)NNNNN)N) Cryptodome.Util.py3compatCryptodome.Util.asn1rrrrCryptodome.IO._PBESrr r __all__r r rrr5sF('''8777777777 8 <@59[<[<[<[<|W0W0W0W0W0W0r