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@ -153,6 +153,32 @@ namespace crypto
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#define elgp GetCryptoConstants ().elgp
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#define elgg GetCryptoConstants ().elgg
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void PrecalculateElggTable (BIGNUM * table[][256], int len) // table is len's array of array of 256 bignums
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{
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if (len <= 0) return;
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BN_CTX * ctx = BN_CTX_new ();
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BN_MONT_CTX * montCtx = BN_MONT_CTX_new ();
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BN_MONT_CTX_set (montCtx, elgp, ctx);
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BIGNUM * elggMont = BN_new ();
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BN_from_montgomery(elggMont, elgg, montCtx, ctx);
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for (int i = 0; i < len; i++)
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{
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table[i][0] = BN_new ();
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if (!i)
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BN_from_montgomery (table[0][0], BN_value_one (), montCtx, ctx); // 2^0 = 1
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else
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BN_mod_mul_montgomery (table[i][0], table[i-1][255], elggMont, montCtx, ctx);
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for (int j = 1; j < 256; j++)
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{
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table[i][j] = BN_new ();
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BN_mod_mul_montgomery (table[i][j], table[i][j-1], elggMont, montCtx, ctx);
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}
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}
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BN_free (elggMont);
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BN_MONT_CTX_free (montCtx);
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BN_CTX_free (ctx);
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}
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// DH
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DHKeys::DHKeys (): m_IsUpdated (true)
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