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Copyright (c) 1999-2004 Ng Pheng Siong. All rights reserved.

Portions Copyright (c) 2004-2007 Open Source Applications Foundation.
Author: Heikki Toivonen
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    Derive a key from password using PBKDF2 algorithm specified in RFC 2898.
    
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    @param iter:     Number of iterations to perform.
    @type iter:      int 
    @param keylen:   Length of key to produce.
    @type keylen:    int
    @return:         Key.
    @rtype:          str
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    Public Key
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        Reset internal message digest context.

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        Assign the RSA key pair to self.

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        @param capture: If true (default), this PKey object will own the RSA
                        object, meaning that once the PKey object gets
                        deleted it is no longer safe to use the RSA object.
        
        @rtype: int
        @return: Return 1 for success and 0 for failure.
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        Save the key pair to a file in PEM format.

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        cipher is 'aes_128_cbc'. If cipher is None, then the key is saved
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        twb(Rtopenfiletsave_key_bio(RtfileR1tcallbacktbio((s2/usr/lib64/python2.7/site-packages/M2Crypto/EVP.pytsave_key
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        Save the key pair to the M2Crypto.BIO object 'bio' in PEM format.

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        @type cipher: string
        @param cipher: Symmetric cipher to protect the key. The default
        cipher is 'aes_128_cbc'. If cipher is None, then the key is saved
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        Return key in PEM format in a string.

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        @type callback: Python callable
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        Return key in DER format in a string
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        Return the modulus in hex format.
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				cCs�tj|d�}|dkr6tjtj���ntj||�}tj|�|dkrvt	tj���nt
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    Load an M2Crypto.EVP.PKey from file.

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    @param callback: A Python callable object that is invoked
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    @rtype: M2Crypto.EVP.PKey
    @return: M2Crypto.EVP.PKey object.
    triN(Rtbio_new_fileRRtBIOErrorRt	get_errort
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cCsFtj|j�|�}|dkr9ttj���nt|d�S(s�
    Load an M2Crypto.EVP.PKey from an M2Crypto.BIO object.

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    @type callback: Python callable
    @param callback: A Python callable object that is invoked
    to acquire a passphrase with which to protect the key.

    @rtype: M2Crypto.EVP.PKey
    @return: M2Crypto.EVP.PKey object.
    iN(RRxRIRRRRwRC(RcRbRz((s2/usr/lib64/python2.7/site-packages/M2Crypto/EVP.pytload_key_biouscCstj|�}t||�S(sl
    Load an M2Crypto.EVP.PKey from a string.

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    @param callback: A Python callable object that is invoked
    to acquire a passphrase with which to protect the key.

    @rtype: M2Crypto.EVP.PKey
    @return: M2Crypto.EVP.PKey object.
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