From cb4a46e7fbe62d788e66ed6121c717a2d22a4d7c Mon Sep 17 00:00:00 2001 From: watcherhd Date: Thu, 21 Apr 2011 14:14:52 +0000 Subject: svn.miranda.im is moving to a new home! git-svn-id: http://miranda-plugins.googlecode.com/svn/trunk@7 e753b5eb-9565-29b2-b5c5-2cc6f99dfbcb --- cryptopp/crypto/trunhash.h | 48 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 cryptopp/crypto/trunhash.h (limited to 'cryptopp/crypto/trunhash.h') diff --git a/cryptopp/crypto/trunhash.h b/cryptopp/crypto/trunhash.h new file mode 100644 index 0000000..16fd8c0 --- /dev/null +++ b/cryptopp/crypto/trunhash.h @@ -0,0 +1,48 @@ +#ifndef CRYPTOPP_TRUNHASH_H +#define CRYPTOPP_TRUNHASH_H + +#include "cryptlib.h" + +NAMESPACE_BEGIN(CryptoPP) + +class NullHash : public HashTransformation +{ +public: + void Update(const byte *input, size_t length) {} + unsigned int DigestSize() const {return 0;} + void TruncatedFinal(byte *digest, size_t digestSize) {} + bool TruncatedVerify(const byte *digest, size_t digestLength) {return true;} +}; + +//! construct new HashModule with smaller DigestSize() from existing one +template +class TruncatedHashTemplate : public HashTransformation +{ +public: + TruncatedHashTemplate(T hm, unsigned int digestSize) + : m_hm(hm), m_digestSize(digestSize) {} + TruncatedHashTemplate(const byte *key, size_t keyLength, unsigned int digestSize) + : m_hm(key, keyLength), m_digestSize(digestSize) {} + TruncatedHashTemplate(size_t digestSize) + : m_digestSize(digestSize) {} + + void Restart() + {m_hm.Restart();} + void Update(const byte *input, size_t length) + {m_hm.Update(input, length);} + unsigned int DigestSize() const {return m_digestSize;} + void TruncatedFinal(byte *digest, size_t digestSize) + {m_hm.TruncatedFinal(digest, digestSize);} + bool TruncatedVerify(const byte *digest, size_t digestLength) + {return m_hm.TruncatedVerify(digest, digestLength);} + +private: + T m_hm; + unsigned int m_digestSize; +}; + +typedef TruncatedHashTemplate TruncatedHashModule; + +NAMESPACE_END + +#endif -- cgit v1.2.3