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jakcron
71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
/**
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* @file RsaKeyGenerator.h
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* @brief Declarations for API resources for generating RSA keys.
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* @author Jack (jakcron)
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* @version 0.1
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* @date 2020/09/12
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**/
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#pragma once
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#include <tc/types.h>
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#include <tc/crypto/detail/RsaKeyGeneratorImpl.h>
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#include <tc/crypto/RsaKey.h>
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namespace tc { namespace crypto {
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/**
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* @class RsaKeyGenerator
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* @brief Class for generating RSA keys.
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*
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* @details
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* The underlying PRNG algorithm is CTR_DBRG.
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*/
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class RsaKeyGenerator
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{
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public:
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/**
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* @brief Default constructor.
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*/
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RsaKeyGenerator() :
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mImpl()
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{}
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/**
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* @brief Generate an RSA key.
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*
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* @param[out] key Buffer to generated RSA key.
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* @param[in] key_bit_size Size in bits of RSA key to generate.
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*
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* @post
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* - The generated key is written to <tt><var>key</var></tt>.
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*
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* @throw tc::crypto::ArgumentException @p key_bit_size was not a multiple of 8.
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*/
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void generateKey(RsaKey& key, size_t key_bit_size)
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{
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if (key_bit_size == 0 || (key_bit_size % 8) != 0) throw tc::ArgumentException("tc::crypto::RsaKeyGenerator::generateKey()", "key_bit_size was not a multiple of 8.");
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key.n = tc::ByteData(key_bit_size/8);
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key.d = tc::ByteData(key_bit_size/8);
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key.e = tc::ByteData(4);
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mImpl.generateKey(key_bit_size, key.n.data(), key.n.size(), nullptr, 0, nullptr, 0, key.d.data(), key.d.size(), key.e.data(), key.e.size());
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}
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private:
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detail::RsaKeyGeneratorImpl mImpl;
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};
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/**
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* @brief Utility function for generating an RSA key.
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*
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* @param[out] key Buffer to generated RSA key.
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* @param[in] key_bit_size Size in bits of RSA key to generate.
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*
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* @post
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* - The generated key is written to <tt><var>key</var></tt>.
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*
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* @throw tc::crypto::ArgumentException @p key_bit_size was not a multiple of 8.
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*/
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void GenerateRsaKey(RsaKey& key, size_t key_bit_size);
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}} // namespace tc::crypto
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