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// PublicKey.cpp
// Implements the cPublicKey class representing a RSA public key in PolarSSL
#include "Globals.h"
#include "PublicKey.h"
cPublicKey::cPublicKey(const AString & a_PublicKeyDER)
{
pk_init(&m_Pk);
if (pk_parse_public_key(&m_Pk, (const Byte *)a_PublicKeyDER.data(), a_PublicKeyDER.size()) != 0)
{
ASSERT(!"Cannot parse PubKey");
return;
}
m_CtrDrbg.Initialize("rsa_pubkey", 10);
}
cPublicKey::~cPublicKey()
{
pk_free(&m_Pk);
}
int cPublicKey::Decrypt(const Byte * a_EncryptedData, size_t a_EncryptedLength, Byte * a_DecryptedData, size_t a_DecryptedMaxLength)
{
size_t DecryptedLen = a_DecryptedMaxLength;
int res = pk_decrypt(&m_Pk,
a_EncryptedData, a_EncryptedLength,
a_DecryptedData, &DecryptedLen, a_DecryptedMaxLength,
ctr_drbg_random, m_CtrDrbg.GetInternal()
);
if (res != 0)
{
return res;
}
return (int)DecryptedLen;
}
int cPublicKey::Encrypt(const Byte * a_PlainData, size_t a_PlainLength, Byte * a_EncryptedData, size_t a_EncryptedMaxLength)
{
size_t EncryptedLength = a_EncryptedMaxLength;
int res = pk_encrypt(&m_Pk,
a_PlainData, a_PlainLength, a_EncryptedData, &EncryptedLength, a_EncryptedMaxLength,
ctr_drbg_random, m_CtrDrbg.GetInternal()
);
if (res != 0)
{
return res;
}
return (int)EncryptedLength;
}
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