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#pragma once
#include <util/generic/array_ref.h>
#include <util/generic/strbuf.h>
class IInputStream;
class MD5 {
public:
MD5() {
Init();
}
void Init();
inline MD5& Update(const void* data, size_t len) {
return Update(MakeArrayRef(static_cast<const ui8*>(data), len));
}
inline MD5& Update(TStringBuf data) {
return Update(data.data(), data.size());
}
inline MD5& Update(const TArrayRef<const ui8> data) {
UpdatePart(data);
return *this;
}
void Pad();
ui8* Final(ui8[16]);
// buf must be char[33];
char* End(char* buf);
// buf must be char[25];
char* End_b64(char* buf);
// 8-byte xor-based mix
ui64 EndHalfMix();
MD5& Update(IInputStream* in);
/*
* Return hex-encoded md5 checksum for given file.
*
* Return nullptr / empty string if the file does not exist.
*/
static char* File(const char* filename, char* buf);
static TString File(const TString& filename);
static char* Data(const void* data, size_t len, char* buf);
static char* Data(const TArrayRef<const ui8>& data, char* buf);
static TString Data(const TArrayRef<const ui8>& data);
static TString Data(TStringBuf data);
static char* Stream(IInputStream* in, char* buf);
static TString Calc(TStringBuf data); // 32-byte hex-encoded
static TString Calc(const TArrayRef<const ui8>& data); // 32-byte hex-encoded
static TString CalcRaw(TStringBuf data); // 16-byte raw
static TString CalcRaw(const TArrayRef<const ui8>& data); // 16-byte raw
static ui64 CalcHalfMix(TStringBuf data);
static ui64 CalcHalfMix(const TArrayRef<const ui8>& data);
static ui64 CalcHalfMix(const char* data, size_t len);
static bool IsMD5(TStringBuf data);
static bool IsMD5(const TArrayRef<const ui8>& data);
private:
void UpdatePart(TArrayRef<const ui8> data);
private:
ui8 BufferSize; /* size of buffer */
ui8 Buffer[64]; /* input buffer */
ui32 State[4]; /* state (ABCD) */
ui64 StreamSize; /* total bytes in input stream */
};
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