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88 lines
2.6 KiB
C++
88 lines
2.6 KiB
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#ifndef cmCryptoHash_h
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#define cmCryptoHash_h
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#include "cmConfigure.h" // IWYU pragma: keep
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#include <stddef.h>
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#include <string>
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#include <vector>
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#include "cm_auto_ptr.hxx"
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/**
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* @brief Abstract base class for cryptographic hash generators
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*/
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class cmCryptoHash
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{
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CM_DISABLE_COPY(cmCryptoHash)
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public:
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enum Algo
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{
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AlgoMD5,
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AlgoSHA1,
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AlgoSHA224,
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AlgoSHA256,
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AlgoSHA384,
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AlgoSHA512,
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AlgoSHA3_224,
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AlgoSHA3_256,
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AlgoSHA3_384,
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AlgoSHA3_512
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};
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cmCryptoHash(Algo algo);
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~cmCryptoHash();
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/// @brief Returns a new hash generator of the requested type
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/// @arg algo Hash type name. Supported hash types are
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/// MD5, SHA1, SHA224, SHA256, SHA384, SHA512,
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/// SHA3_224, SHA3_256, SHA3_384, SHA3_512
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/// @return A valid auto pointer if algo is supported or
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/// an invalid/NULL pointer otherwise
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static CM_AUTO_PTR<cmCryptoHash> New(const char* algo);
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/// @brief Converts a hex character to its binary value (4 bits)
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/// @arg input Hex character [0-9a-fA-F].
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/// @arg output Binary value of the input character (4 bits)
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/// @return True if input was a valid hex character
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static bool IntFromHexDigit(char input, char& output);
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/// @brief Converts a byte hash to a sequence of hex character pairs
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static std::string ByteHashToString(const std::vector<unsigned char>& hash);
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/// @brief Calculates a binary hash from string input data
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/// @return Binary hash vector
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std::vector<unsigned char> ByteHashString(const std::string& input);
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/// @brief Calculates a binary hash from file content
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/// @see ByteHashString()
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/// @return Non empty binary hash vector if the file was read successfully.
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/// An empty vector otherwise.
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std::vector<unsigned char> ByteHashFile(const std::string& file);
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/// @brief Calculates a hash string from string input data
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/// @return Sequence of hex characters pairs for each byte of the binary hash
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std::string HashString(const std::string& input);
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/// @brief Calculates a hash string from file content
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/// @see HashString()
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/// @return Non empty hash string if the file was read successfully.
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/// An empty string otherwise.
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std::string HashFile(const std::string& file);
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void Initialize();
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void Append(void const*, size_t);
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void Append(std::string const& str);
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std::vector<unsigned char> Finalize();
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std::string FinalizeHex();
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private:
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unsigned int Id;
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struct rhash_context* CTX;
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};
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#endif
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