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move tomcrypt helpers into a separate file; they're useful separately

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This commit is contained in:
Glenn Maynard
2008-07-11 23:44:41 +00:00
parent 5b49bb2983
commit 319d72b5fe
4 changed files with 130 additions and 88 deletions
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stepmania/src/CryptManager.cpp
+20 -88
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@@ -4,6 +4,7 @@
#include "RageLog.h"
#include "RageFile.h"
#include "RageFileManager.h"
#include "CryptHelpers.h"
#include "libtomcrypt/src/headers/tomcrypt.h"
@@ -74,92 +75,8 @@ static const int KEY_LENGTH = 1024;
*
*/
class PRNGWrapper
{
public:
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()
{
if( m_iPRNG != -1 )
prng_descriptor[m_iPRNG].done( &m_PRNG );
}
void 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 AddRandomEntropy()
{
unsigned char buf[256];
int iRet = rng_get_bytes( buf, sizeof(buf), NULL );
ASSERT( iRet == sizeof(buf) );
AddEntropy( buf, sizeof(buf) );
}
int m_iPRNG;
prng_state m_PRNG;
};
static PRNGWrapper *g_pPRNG = NULL;
class RSAKeyWrapper
{
public:
RSAKeyWrapper()
{
memset( &m_Key, 0, sizeof(m_Key) );
}
~RSAKeyWrapper()
{
Unload();
}
void Unload()
{
rsa_free( &m_Key );
}
void 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 Load( const RString &sKey )
{
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) );
LOG->Warn( "Error loading RSA Key: %s", error_to_string(iRet) );
return false;
}
return true;
}
rsa_key m_Key;
};
CryptManager::CryptManager()
{
@@ -176,14 +93,21 @@ void CryptManager::GenerateGlobalKeys()
bool bGenerate = false;
RSAKeyWrapper key;
RString sKey;
RString sError;
if( !DoesFileExist(PRIVATE_KEY_PATH) ||
!GetFileContents(PRIVATE_KEY_PATH, sKey) ||
!key.Load(sKey) )
!key.Load(sKey, sError) )
bGenerate = true;
if( !sError.empty() )
LOG->Warn( "Error loading RSA key: %s", sError.c_str() );
sError.clear();
if( !DoesFileExist(PUBLIC_KEY_PATH) ||
!GetFileContents(PUBLIC_KEY_PATH, sKey) ||
!key.Load(sKey) )
!key.Load(sKey, sError) )
bGenerate = true;
if( !sError.empty() )
LOG->Warn( "Error loading RSA key: %s", sError.c_str() );
if( bGenerate )
{
@@ -300,8 +224,12 @@ bool CryptManager::Sign( RString sPath, RString &sSignatureOut, RString sPrivKey
}
RSAKeyWrapper key;
if( !key.Load(sPrivKey) )
RString sError;
if( !key.Load(sPrivKey, sError) )
{
LOG->Warn( "Error loading RSA key: %s", sError.c_str() );
return false;
}
int iHash = register_hash( &sha1_desc );
ASSERT( iHash >= 0 );
@@ -377,8 +305,12 @@ bool CryptManager::VerifyFileWithFile( RString sPath, RString sSignatureFile, RS
bool CryptManager::Verify( RageFileBasic &file, RString sSignature, RString sPublicKey )
{
RSAKeyWrapper key;
if( !key.Load(sPublicKey) )
RString sError;
if( !key.Load(sPublicKey, sError) )
{
LOG->Warn( "Error loading RSA key: %s", sError.c_str() );
return false;
}
int iHash = register_hash( &sha1_desc );
ASSERT( iHash >= 0 );