64 lines
1.3 KiB
C++
64 lines
1.3 KiB
C++
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// CtrDrbgContext.h
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// Declares the cCtrDrbgContext class representing a wrapper over CTR-DRBG implementation in mbedTLS
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#pragma once
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#include "mbedtls/ctr_drbg.h"
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// fwd: EntropyContext.h
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class cEntropyContext;
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class cCtrDrbgContext
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{
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friend class cSslConfig;
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friend class cRsaPrivateKey;
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friend class cCryptoKey;
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public:
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/** Constructs the context with a new entropy context. */
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cCtrDrbgContext(void);
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/** Constructs the context with the specified entropy context. */
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cCtrDrbgContext(const std::shared_ptr<cEntropyContext> & a_EntropyContext);
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/** Initializes the context.
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a_Custom is optional additional data to use for entropy, nullptr is accepted.
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Returns 0 if successful, mbedTLS error code on failure. */
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int Initialize(const void * a_Custom, size_t a_CustomSize);
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/** Returns true if the object is valid (has been initialized properly) */
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bool IsValid(void) const { return m_IsValid; }
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protected:
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/** The entropy source used for generating the random */
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std::shared_ptr<cEntropyContext> m_EntropyContext;
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/** The random generator context */
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mbedtls_ctr_drbg_context m_CtrDrbg;
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/** Set to true if the object is valid (has been initialized properly) */
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bool m_IsValid;
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/** Returns the internal context ptr. Only use in mbedTLS API calls. */
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mbedtls_ctr_drbg_context * GetInternal(void) { return &m_CtrDrbg; }
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} ;
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