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Allow computing md5 hashes from hsStream derived classes

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This commit is contained in:
Adam Johnson
2012-01-07 23:54:38 -05:00
parent d420ac6da7
commit 3508df1c16
2 changed files with 30 additions and 14 deletions
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40
Sources/Plasma/PubUtilLib/plEncryption/plChecksum.cpp
View File

@ -91,33 +91,45 @@ plMD5Checksum::plMD5Checksum( const char *fileName )
CalcFromFile( fileName );
}
plMD5Checksum::plMD5Checksum( hsStream* stream )
{
CalcFromStream(stream);
}
void plMD5Checksum::Clear()
{
memset( fChecksum, 0, sizeof( fChecksum ) );
fValid = false;
}
void plMD5Checksum::CalcFromFile( const char *fileName)
void plMD5Checksum::CalcFromFile( const char *fileName )
{
FILE *fp;
hsUNIXStream s;
fValid = false;
if( fp = fopen(fileName, "rb" ) )
if( s.Open(fileName) )
{
unsigned loadLen = 1024 * 1024;
Start();
UInt8 *buf = TRACKED_NEW UInt8[loadLen];
while(int read = fread(buf, sizeof(UInt8), loadLen, fp))
AddTo( read, buf );
delete[] buf;
Finish();
fclose(fp);
CalcFromStream(&s);
s.Close();
}
}
void plMD5Checksum::CalcFromStream( hsStream* stream )
{
UInt32 sPos = stream->GetPosition();
unsigned loadLen = 1024 * 1024;
Start();
UInt8 *buf = TRACKED_NEW UInt8[loadLen];
while(int read = stream->Read(loadLen, buf))
AddTo( read, buf );
delete[] buf;
Finish();
stream->SetPosition(sPos);
}
void plMD5Checksum::Start( void )
{
MD5_Init( &fContext );

4
Sources/Plasma/PubUtilLib/plEncryption/plChecksum.h
View File

@ -58,6 +58,8 @@ public:
SumStorage GetChecksum() { return fSum; }
};
class hsStream;
class plMD5Checksum
{
protected:
@ -74,11 +76,13 @@ class plMD5Checksum
plMD5Checksum();
plMD5Checksum( const plMD5Checksum &rhs );
plMD5Checksum( const char *fileName );
plMD5Checksum( hsStream* stream );
hsBool IsValid( void ) const { return fValid; }
void Clear();
void CalcFromFile( const char *fileName );
void CalcFromStream( hsStream* stream );
void Start( void );
void AddTo( UInt32 size, const UInt8 *buffer );