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#include "md5.h"
#include <contrib/libs/nayuki_md5/md5.h>
#include <util/generic/strbuf.h>
#include <util/generic/string.h>
#include <util/stream/input.h>
#include <util/stream/file.h>
#include <library/cpp/string_utils/base64/base64.h>
#include <util/string/hex.h>
#include <cstring>
#include <cstdlib>
namespace {
constexpr size_t MD5_HEX_DIGEST_LENGTH = 32;
struct TMd5Stream: public IOutputStream {
inline TMd5Stream(MD5* md5)
: M_(md5)
{
}
void DoWrite(const void* buf, size_t len) override {
M_->Update(buf, len);
}
MD5* M_;
};
}
char* MD5::File(const char* filename, char* buf) {
try {
TUnbufferedFileInput fi(filename);
return Stream(&fi, buf);
} catch (...) {
}
return nullptr;
}
TString MD5::File(const TString& filename) {
TString buf;
buf.ReserveAndResize(MD5_HEX_DIGEST_LENGTH);
auto result = MD5::File(filename.data(), buf.begin());
if (result == nullptr) {
buf.clear();
}
return buf;
}
char* MD5::Data(const void* data, size_t len, char* buf) {
MD5 md5;
md5.Update(data, len);
return md5.End(buf);
}
TString MD5::Data(TArrayRef<ui8> data) {
MD5 md5;
md5.Update(data.data(), data.size());
TString buf;
buf.ReserveAndResize(MD5_HEX_DIGEST_LENGTH);
md5.End(buf.begin());
return buf;
}
TString MD5::Data(TStringBuf data) {
MD5 md5;
md5.Update(data.data(), data.size());
TString buf;
buf.ReserveAndResize(MD5_HEX_DIGEST_LENGTH);
md5.End(buf.begin());
return buf;
}
char* MD5::Stream(IInputStream* in, char* buf) {
return MD5().Update(in).End(buf);
}
MD5& MD5::Update(IInputStream* in) {
TMd5Stream md5(this);
TransferData(in, &md5);
return *this;
}
static inline void MD5Transform(ui32 state[4], const unsigned char block[64]) {
return md5_compress((uint32_t*)state, (const ui8*)block);
}
/*
* Encodes input (ui32) into output (unsigned char). Assumes len is
* a multiple of 4.
*/
static void Encode(unsigned char* output, ui32* input, unsigned int len) {
unsigned int i, j;
for (i = 0, j = 0; j < len; i++, j += 4) {
output[j] = (unsigned char)(input[i] & 0xff);
output[j + 1] = (unsigned char)((input[i] >> 8) & 0xff);
output[j + 2] = (unsigned char)((input[i] >> 16) & 0xff);
output[j + 3] = (unsigned char)((input[i] >> 24) & 0xff);
}
}
static unsigned char PADDING[64] = {
0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
/* MD5 initialization. Begins an MD5 operation, writing a new context. */
void MD5::Init() {
Count[0] = Count[1] = 0;
/* Load magic initialization constants. */
State[0] = 0x67452301;
State[1] = 0xefcdab89;
State[2] = 0x98badcfe;
State[3] = 0x10325476;
}
/*
* MD5 block update operation. Continues an MD5 message-digest
* operation, processing another message block, and updating the
* context.
*/
void MD5::UpdatePart(const void* inputPtr, unsigned int inputLen) {
const unsigned char* input = (const unsigned char*)inputPtr;
unsigned int i, index, partLen;
/* Compute number of bytes mod 64 */
index = (unsigned int)((Count[0] >> 3) & 0x3F);
/* Update number of bits */
if ((Count[0] += ((ui32)inputLen << 3)) < ((ui32)inputLen << 3))
Count[1]++;
Count[1] += ((ui32)inputLen >> 29);
partLen = 64 - index;
/* Transform as many times as possible. */
if (inputLen >= partLen) {
memcpy((void*)&Buffer[index], (const void*)input, partLen);
MD5Transform(State, Buffer);
for (i = partLen; i + 63 < inputLen; i += 64)
MD5Transform(State, &input[i]);
index = 0;
} else
i = 0;
/* Buffer remaining input */
memcpy((void*)&Buffer[index], (const void*)&input[i], inputLen - i);
}
/*
* MD5 padding. Adds padding followed by original length.
*/
void MD5::Pad() {
unsigned char bits[8];
unsigned int index, padLen;
/* Save number of bits */
Encode(bits, Count, 8);
/* Pad out to 56 mod 64. */
index = (unsigned int)((Count[0] >> 3) & 0x3f);
padLen = (index < 56) ? (56 - index) : (120 - index);
Update(PADDING, padLen);
/* Append length (before padding) */
Update(bits, 8);
}
/*
* MD5 finalization. Ends an MD5 message-digest operation, writing the
* the message digest and zeroizing the context.
*/
unsigned char* MD5::Final(unsigned char digest[16]) {
/* Do padding. */
Pad();
/* Store state in digest */
Encode(digest, State, 16);
/* Zeroize sensitive information. */
memset((void*)this, 0, sizeof(*this));
return digest;
}
char* MD5::End(char* buf) {
unsigned char digest[16];
static const char hex[] = "0123456789abcdef";
if (!buf)
buf = (char*)malloc(33);
if (!buf)
return nullptr;
Final(digest);
int i = 0;
for (; i < 16; i++) {
buf[i + i] = hex[digest[i] >> 4];
buf[i + i + 1] = hex[digest[i] & 0x0f];
}
buf[i + i] = '\0';
return buf;
}
char* MD5::End_b64(char* buf) {
unsigned char digest[16];
if (!buf)
buf = (char*)malloc(25);
if (!buf)
return nullptr;
Final(digest);
Base64Encode(buf, digest, 16);
buf[24] = '\0';
return buf;
}
ui64 MD5::EndHalfMix() {
unsigned char digest[16];
Final(digest);
ui64 res = 0;
for (int i = 3; i >= 0; i--) {
res |= (ui64)(digest[0 + i] ^ digest[8 + i]) << ((3 - i) << 3);
res |= (ui64)(digest[4 + i] ^ digest[12 + i]) << ((7 - i) << 3);
}
return res;
}
TString MD5::Calc(const TStringBuf& data) {
TString result;
result.resize(32);
Data((const unsigned char*)data.data(), data.size(), result.begin());
return result;
}
TString MD5::CalcRaw(const TStringBuf& data) {
TString result;
result.resize(16);
MD5 md5;
md5.Update(data.data(), data.size());
md5.Final(reinterpret_cast<unsigned char*>(result.begin()));
return result;
}
ui64 MD5::CalcHalfMix(const char* data, size_t len) {
MD5 md5;
md5.Update(data, len);
return md5.EndHalfMix();
}
ui64 MD5::CalcHalfMix(const TStringBuf& data) {
return CalcHalfMix(data.data(), data.size());
}
bool MD5::IsMD5(const TStringBuf& data) {
if (data.size() != 32) {
return false;
}
for (const char *p = data.data(), *e = data.data() + data.size(); p != e; ++p) {
if (Char2DigitTable[(unsigned char)*p] == '\xff') {
return false;
}
}
return true;
}
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