68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
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// RsaPrivateKey.h
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// Declares the cRsaPrivateKey class representing a private key for RSA operations.
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#pragma once
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#include "CtrDrbgContext.h"
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#include "mbedtls/rsa.h"
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/** Encapsulates an RSA private key used in PKI cryptography */
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class cRsaPrivateKey
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{
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friend class cSslContext;
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public:
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/** Creates a new empty object, the key is not assigned */
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cRsaPrivateKey(void);
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/** Deep-copies the key from a_Other */
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cRsaPrivateKey(const cRsaPrivateKey & a_Other);
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~cRsaPrivateKey();
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/** Generates a new key within this object, with the specified size in bits.
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Returns true on success, false on failure. */
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bool Generate(unsigned a_KeySizeBits = 1024);
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/** Returns the public key part encoded in ASN1 DER encoding */
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AString GetPubKeyDER(void);
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/** Decrypts the data using RSAES-PKCS#1 algorithm.
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Both a_EncryptedData and a_DecryptedData must be at least <KeySizeBytes> bytes large.
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Returns the number of bytes decrypted, or negative number for error. */
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int Decrypt(const Byte * a_EncryptedData, size_t a_EncryptedLength, Byte * a_DecryptedData, size_t a_DecryptedMaxLength);
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/** Encrypts the data using RSAES-PKCS#1 algorithm.
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Both a_EncryptedData and a_DecryptedData must be at least <KeySizeBytes> bytes large.
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Returns the number of bytes decrypted, or negative number for error. */
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int Encrypt(const Byte * a_PlainData, size_t a_PlainLength, Byte * a_EncryptedData, size_t a_EncryptedMaxLength);
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protected:
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/** The mbedTLS key context */
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mbedtls_rsa_context m_Rsa;
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/** The random generator used for generating the key and encryption / decryption */
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cCtrDrbgContext m_CtrDrbg;
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/** Returns the internal context ptr. Only use in mbedTLS API calls. */
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mbedtls_rsa_context * GetInternal(void) { return &m_Rsa; }
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} ;
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typedef std::shared_ptr<cRsaPrivateKey> cRsaPrivateKeyPtr;
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