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(originally defined in PKCS#5 v1.5, but still present in `v2.0`__).
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.. __: http://www.ietf.org/rfc/rfc2898.txt
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j& |fi |¤}|j) |« }t+ ||j, « S )ax Decrypt a piece of data using a passphrase and *PBES1*.
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The algorithm to use is automatically detected.
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:Parameters:
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data : byte string
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The piece of data to decrypt.
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passphrase : byte string
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The passphrase to use for decrypting the data.
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:Returns:
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The decrypted data, as a binary string.
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r é )ÚMD5)ÚDES)ÚARC2é@ Úeffective_keylen)ÚSHA1zUnknown OID for PBES1é ©Ú nr_elementsé Né )r Údecoder Úpayloadr ÚvalueÚ _OID_PBE_WITH_MD5_AND_DES_CBCÚ Crypto.Hashr Ú Crypto.Cipherr Ú _OID_PBE_WITH_MD5_AND_RC2_CBCr Ú _OID_PBE_WITH_SHA1_AND_DES_CBCr Ú _OID_PBE_WITH_SHA1_AND_RC2_CBCr r ÚnewÚMODE_CBCÚdecryptr Ú
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:Parameters:
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data : byte string
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The piece of data to encrypt.
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passphrase : byte string
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The passphrase to use for encrypting the data.
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protection : string
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The identifier of the encryption algorithm to use.
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The default value is '``PBKDF2WithHMAC-SHA1AndDES-EDE3-CBC``'.
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prot_params : dictionary
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Parameters of the protection algorithm.
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+------------------+-----------------------------------------------+
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| Key | Description |
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+==================+===============================================+
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| iteration_count | The KDF algorithm is repeated several times to|
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| | slow down brute force attacks on passwords |
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| | (called *N* or CPU/memory cost in scrypt). |
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| | |
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| | The default value for PBKDF2 is 1 000. |
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| | The default value for scrypt is 16 384. |
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+------------------+-----------------------------------------------+
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| salt_size | Salt is used to thwart dictionary and rainbow |
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| | attacks on passwords. The default value is 8 |
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| | bytes. |
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+------------------+-----------------------------------------------+
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| block_size | *(scrypt only)* Memory-cost (r). The default |
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| | value is 8. |
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+------------------+-----------------------------------------------+
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| parallelization | *(scrypt only)* CPU-cost (p). The default |
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| | value is 1. |
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+------------------+-----------------------------------------------+
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randfunc : callable
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Random number generation function; it should accept
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a single integer N and return a string of random data,
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N bytes long. If not specified, a new RNG will be
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instantiated from ``Crypto.Random``.
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:Returns:
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The encrypted data, as a binary string.
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:Parameters:
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data : byte string
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passphrase : byte string
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The passphrase to use for decrypting the data.
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:Returns:
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The decrypted data, as a binary string.
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