ó QjëOc@skdZddlTddlmZdefd„ƒYZd d„Zd„Zde fd „ƒYZ e Z d S( s$Id$iÿÿÿÿ(t*(tnumberterrorcBseZRS((t__name__t __module__(((s</usr/lib/python2.7/dist-packages/Crypto/PublicKey/ElGamal.pyRscCsàtƒ}|r|dƒnxItt|d|ƒƒ}d|d|_tj|jd|ƒrPqq|r{|dƒnxûtjd|j|ƒ|_d}t|jd|jƒdkrÆd}n|rót|j||jƒdkród}n|r%t |jd|jƒddkr%d}ntj |j|jƒ}|rlt |jd|ƒddkrld}n|r~Pq~q~|rŒ|dƒntjd|jd|ƒ|_ |r¾|d ƒnt|j|j |jƒ|_ |S( sígenerate(bits:int, randfunc:callable, progress_func:callable) Generate an ElGamal key of length 'bits', using 'randfunc' to get random data and 'progress_func', if present, to display the progress of the key generation. sp iitrandfuncsg iisx sy ( t ElGamalobjtbignumtgetPrimetpRtisPrimetgetRandomRangetgtpowtdivmodtinversetxty(tbitsRt progress_functobjtqtsafetginv((s</usr/lib/python2.7/dist-packages/Crypto/PublicKey/ElGamal.pytgenerate#s>    $ ) &   cCsltƒ}t|ƒdkr*tdƒ‚nx;tt|ƒƒD]'}|j|}t||||ƒq=W|S(sŸconstruct(tuple:(long,long,long,long)|(long,long,long,long,long))) : ElGamalobj Construct an ElGamal key from a 3- or 4-tuple of numbers. iis%argument for construct() wrong length(ii(Rtlent ValueErrortrangetkeydatatsetattr(ttupleRtitfield((s</usr/lib/python2.7/dist-packages/Crypto/PublicKey/ElGamal.pyt constructZs  RcBsYeZddddgZd„Zd„Zd„Zd„Zd„Zd „Zd „Z RS( R R RRcCsEt|j||jƒ}|t|j||jƒ|j}||fS(N(R R R R(tselftMtKtatb((s</usr/lib/python2.7/dist-packages/Crypto/PublicKey/ElGamal.pyt_encryptks#cCs_t|dƒstdƒ‚nt|d|j|jƒ}|dt||jƒ|j}|S(NRs(Private key not available in this objectii(thasattrt TypeErrorR RR R(R"R#taxt plaintext((s</usr/lib/python2.7/dist-packages/Crypto/PublicKey/ElGamal.pyt_decryptps !cCsºt|dƒstdƒ‚n|jd}t||ƒdkrOtdƒ‚nt|j||jƒ}||j||}x|dkr˜||}qW|t||ƒ|}||fS(NRs(Private key not available in this objectisBad K value: GCD(K,p-1)!=1i( R(R)R tGCDRR R RR(R"R#R$tp1R%ttR&((s</usr/lib/python2.7/dist-packages/Crypto/PublicKey/ElGamal.pyt_signws cCs›|ddks'|d|jdkr+dSt|j|d|jƒ}|t|d|d|jƒ|j}t|j||jƒ}||kr—dSdS(Nii(R R RR (R"R#tsigtv1tv2((s</usr/lib/python2.7/dist-packages/Crypto/PublicKey/ElGamal.pyt_verifyƒs'( cCstj|jƒdS(sBReturn the maximum number of bits that can be handled by this key.i(RtsizeR (R"((s</usr/lib/python2.7/dist-packages/Crypto/PublicKey/ElGamal.pyR5scCst|dƒrdSdSdS(sQReturn a Boolean denoting whether the object contains private components.RiiN(R((R"((s</usr/lib/python2.7/dist-packages/Crypto/PublicKey/ElGamal.pyt has_private‘scCst|j|j|jfƒS(s?Return a new key object containing only the public information.(R!R R R(R"((s</usr/lib/python2.7/dist-packages/Crypto/PublicKey/ElGamal.pyt publickey™s( RRRR'R,R0R4R5R6R7(((s</usr/lib/python2.7/dist-packages/Crypto/PublicKey/ElGamal.pyRhs    N( t __revision__tCrypto.PublicKey.pubkeyt Crypto.UtilRt ExceptionRtNoneRR!tpubkeyRtobject(((s</usr/lib/python2.7/dist-packages/Crypto/PublicKey/ElGamal.pyts  7 6