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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(void)
{
pk_init(&m_Pk);
m_CtrDrbg.Initialize("rsa_pubkey", 10);
}
cPublicKey::cPublicKey(const AString & a_PublicKeyData)
{
pk_init(&m_Pk);
m_CtrDrbg.Initialize("rsa_pubkey", 10);
int res = ParsePublic(a_PublicKeyData.data(), a_PublicKeyData.size());
if (res != 0)
{
LOGWARNING("Failed to parse public key: -0x%x", res);
ASSERT(!"Cannot parse PubKey");
return;
}
}
cPublicKey::cPublicKey(const AString & a_PrivateKeyData, const AString & a_Password)
{
pk_init(&m_Pk);
m_CtrDrbg.Initialize("rsa_privkey", 11);
int res = ParsePrivate(a_PrivateKeyData.data(), a_PrivateKeyData.size(), a_Password);
if (res != 0)
{
LOGWARNING("Failed to parse private key: -0x%x", res);
ASSERT(!"Cannot parse PubKey");
return;
}
}
cPublicKey::~cPublicKey()
{
pk_free(&m_Pk);
}
int cPublicKey::Decrypt(const Byte * a_EncryptedData, size_t a_EncryptedLength, Byte * a_DecryptedData, size_t a_DecryptedMaxLength)
{
ASSERT(IsValid());
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)
{
ASSERT(IsValid());
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;
}
int cPublicKey::ParsePublic(const void * a_Data, size_t a_NumBytes)
{
ASSERT(!IsValid()); // Cannot parse a second key
return pk_parse_public_key(&m_Pk, (const unsigned char *)a_Data, a_NumBytes);
}
int cPublicKey::ParsePrivate(const void * a_Data, size_t a_NumBytes, const AString & a_Password)
{
ASSERT(!IsValid()); // Cannot parse a second key
if (a_Password.empty())
{
return pk_parse_key(&m_Pk, (const unsigned char *)a_Data, a_NumBytes, NULL, 0);
}
else
{
return pk_parse_key(
&m_Pk,
(const unsigned char *)a_Data, a_NumBytes,
(const unsigned char *)a_Password.c_str(), a_Password.size()
);
}
}
bool cPublicKey::IsValid(void) const
{
return (pk_get_type(&m_Pk) != POLARSSL_PK_NONE);
}
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