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  • Committer: weidai
  • Date: 2009-03-02 02:39:17 UTC
  • Revision ID: svn-v4:57ff6487-cd31-0410-9ec3-f628ee90f5f0:trunk/c5:433
changes for 5.6: 
    - added AuthenticatedSymmetricCipher interface class and Filter wrappers
    - added CCM, GCM (with SSE2 assembly), CMAC, and SEED
    - improved AES speed on x86 and x64
    - removed WORD64_AVAILABLE; compiler 64-bit int support is now required

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Lines of Context:
hmac.cpp
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NAMESPACE_BEGIN(CryptoPP)
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void HMAC_Base::UncheckedSetKey(const byte *userKey, unsigned int keylength)
 
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void HMAC_Base::UncheckedSetKey(const byte *userKey, unsigned int keylength, const NameValuePairs &)
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{
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        AssertValidKeyLength(keylength);
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        if (!blockSize)
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                throw InvalidArgument("HMAC: can only be used with a block-based hash function");
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        m_buf.resize(2*AccessHash().BlockSize() + AccessHash().DigestSize());
 
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        if (keylength <= blockSize)
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                memcpy(AccessIpad(), userKey, keylength);
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        else
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        for (unsigned int i=0; i<blockSize; i++)
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        {
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                AccessOpad()[i] = AccessIpad()[i] ^ OPAD;
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                AccessIpad()[i] ^= IPAD;
 
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                AccessOpad()[i] = AccessIpad()[i] ^ 0x5c;
 
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                AccessIpad()[i] ^= 0x36;
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        }
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}
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