smsvn -> ssc-hg glue: rearrange directory structure

src/CryptHelpers.cpp

@@ -0,0 +1,74 @@
+#include "global.h"
+#include "CryptHelpers.h"
+
+PRNGWrapper::PRNGWrapper( const struct ltc_prng_descriptor *pPRNGDescriptor )
+{
+	m_iPRNG = register_prng( pPRNGDescriptor );
+	ASSERT( m_iPRNG >= 0 );
+
+	int iRet = rng_make_prng( 128, m_iPRNG, &m_PRNG, NULL );
+	ASSERT_M( iRet == CRYPT_OK, error_to_string(iRet) );
+}
+
+PRNGWrapper::~PRNGWrapper()
+{
+	if( m_iPRNG != -1 )
+		prng_descriptor[m_iPRNG].done( &m_PRNG );
+}
+
+void PRNGWrapper::AddEntropy( const void *pData, int iSize )
+{
+	int iRet = prng_descriptor[m_iPRNG].add_entropy( (const unsigned char *) pData, iSize, &m_PRNG );
+	ASSERT_M( iRet == CRYPT_OK, error_to_string(iRet) );
+
+	iRet = prng_descriptor[m_iPRNG].ready( &m_PRNG );
+	ASSERT_M( iRet == CRYPT_OK, error_to_string(iRet) );
+}
+
+void PRNGWrapper::AddRandomEntropy()
+{
+	unsigned char buf[256];
+	int iRet = rng_get_bytes( buf, sizeof(buf), NULL );
+	ASSERT( iRet == sizeof(buf) );
+
+	AddEntropy( buf, sizeof(buf) );
+}
+
+RSAKeyWrapper::RSAKeyWrapper()
+{
+	memset( &m_Key, 0, sizeof(m_Key) );
+}
+
+RSAKeyWrapper::~RSAKeyWrapper()
+{
+	Unload();
+}
+
+void RSAKeyWrapper::Unload()
+{
+	rsa_free( &m_Key );
+}
+
+void RSAKeyWrapper::Generate( PRNGWrapper &prng, int iKeyLenBits )
+{
+	Unload();
+
+	int iRet = rsa_make_key( &prng.m_PRNG, prng.m_iPRNG, iKeyLenBits / 8, 65537, &m_Key );
+	ASSERT( iRet == CRYPT_OK );
+}
+
+bool RSAKeyWrapper::Load( const RString &sKey, RString &sError )
+{
+	Unload();
+
+	int iRet = rsa_import( (const unsigned char *) sKey.data(), sKey.size(), &m_Key );
+	if( iRet != CRYPT_OK )
+	{
+		memset( &m_Key, 0, sizeof(m_Key) );
+		sError = error_to_string(iRet);
+		return false;
+	}
+
+	return true;
+}
+