mirror of
https://github.com/RetroDECK/ES-DE.git
synced 2024-11-22 06:05:38 +00:00
Added a function to generate MD5 hashes.
This commit is contained in:
Leon Styhre
parent
816d79c32f
commit
192bec6f5c
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@ -365,8 +365,8 @@ template <typename T> void TextListComponent<T>::update(int deltaTime)
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while (mMarqueeTime > maxTime)
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mMarqueeTime -= maxTime;
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mMarqueeOffset = static_cast<int>(Utils::Math::Scroll::loop(
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delay, scrollTime + returnTime, static_cast<float>(mMarqueeTime),
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mMarqueeOffset = static_cast<int>(Utils::Math::loop(delay, scrollTime + returnTime,
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static_cast<float>(mMarqueeTime),
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scrollLength + returnLength));
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if (mMarqueeOffset > (scrollLength - (limit - returnLength)))
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@ -7,8 +7,15 @@
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// The GLM library headers are also included from here.
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//
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#if defined(_MSC_VER) // MSVC compiler.
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#define _CRT_SECURE_NO_WARNINGS
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#endif
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#include "utils/MathUtil.h"
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#include <cstring>
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#include <sstream>
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namespace Utils
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{
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namespace Math
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@ -25,8 +32,25 @@ namespace Utils
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return x * x * x * (x * ((x * 6.0f) - 15.0f) + 10.0f);
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}
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namespace Scroll
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float loop(const float delayTime,
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const float scrollTime,
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const float currentTime,
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const float scrollLength)
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{
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if (currentTime < delayTime) {
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// Wait.
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return 0.0f;
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}
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else if (currentTime < (delayTime + scrollTime)) {
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// Interpolate from 0 to scrollLength.
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const float fraction{(currentTime - delayTime) / scrollTime};
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return glm::mix(0.0f, scrollLength, fraction);
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}
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// And back to waiting.
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return 0.0f;
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}
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float bounce(const float delayTime,
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const float scrollTime,
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const float currentTime,
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@ -55,26 +79,255 @@ namespace Utils
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return 0.0f;
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}
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float loop(const float delayTime,
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const float scrollTime,
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const float currentTime,
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const float scrollLength)
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std::string md5Hash(const std::string& data)
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{
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if (currentTime < delayTime) {
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// Wait.
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return 0.0f;
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// Data that didn't fit in last 64 byte chunk.
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unsigned char buffer[64]{};
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// 64 bit counter for the number of bits (low, high).
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unsigned int count[2]{};
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// Digest so far.
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unsigned int state[4];
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// Magic initialization constants.
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state[0] = 0x67452301;
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state[1] = 0xefcdab89;
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state[2] = 0x98badcfe;
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state[3] = 0x10325476;
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md5Update(reinterpret_cast<const unsigned char*>(data.c_str()),
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static_cast<unsigned int>(data.length()), state, count, buffer);
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static unsigned char padding[64]{0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
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// Encodes unsigned int input into unsigned char output. Assumes len is a multiple of 4.
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auto encodeFunc = [](unsigned char output[], const unsigned int input[],
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unsigned int len) {
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for (unsigned int i = 0, j = 0; j < len; i++, j += 4) {
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output[j] = input[i] & 0xff;
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output[j + 1] = (input[i] >> 8) & 0xff;
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output[j + 2] = (input[i] >> 16) & 0xff;
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output[j + 3] = (input[i] >> 24) & 0xff;
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}
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else if (currentTime < (delayTime + scrollTime)) {
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// Interpolate from 0 to scrollLength.
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const float fraction{(currentTime - delayTime) / scrollTime};
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return glm::mix(0.0f, scrollLength, fraction);
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};
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// Save number of bits.
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unsigned char bits[8];
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encodeFunc(bits, count, 8);
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// Pad out to 56 mod 64.
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unsigned int index = count[0] / 8 % 64;
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unsigned int padLen = (index < 56) ? (56 - index) : (120 - index);
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md5Update(padding, padLen, state, count, buffer);
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// Append length (before padding).
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md5Update(bits, 8, state, count, buffer);
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// The result.
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unsigned char digest[16];
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// Store state in digest.
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encodeFunc(digest, state, 16);
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// Convert to hex string.
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char buf[33];
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for (int i = 0; i < 16; i++)
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sprintf(buf + i * 2, "%02x", digest[i]);
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buf[32] = 0;
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return std::string(buf);
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}
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// And back to waiting.
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return 0.0f;
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void md5Update(const unsigned char input[],
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unsigned int length,
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unsigned int (&state)[4],
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unsigned int (&count)[2],
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unsigned char (&buffer)[64])
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{
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// Compute number of bytes (mod 64).
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unsigned int index = count[0] / 8 % 64;
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// Update number of bits.
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if ((count[0] += (length << 3)) < (length << 3))
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count[1]++;
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count[1] += (length >> 29);
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// Number of bytes we need to fill in buffer.
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unsigned int firstpart = 64 - index;
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unsigned int i;
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// Encodes unsigned int input into unsigned char output. Assumes len is a multiple of 4.
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// Transform as many times as possible.
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if (length >= firstpart) {
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// Fill buffer first, then transform.
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memcpy(&buffer[index], input, firstpart);
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md5Transform(buffer, state);
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// Transform chunks of 64 (64 bytes).
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for (i = firstpart; i + 64 <= length; i += 64)
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md5Transform(&input[i], state);
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index = 0;
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}
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else
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i = 0;
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// Buffer remaining input.
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memcpy(&buffer[index], &input[i], length - i);
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}
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} // namespace Scroll
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void md5Transform(const unsigned char block[64], unsigned int (&state)[4])
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{
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unsigned int a{state[0]};
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unsigned int b{state[1]};
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unsigned int c{state[2]};
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unsigned int d{state[3]};
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unsigned int x[16]{};
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// Encodes unsigned int input into unsigned char output. Assumes len is a multiple of 4.
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for (unsigned int i = 0, j = 0; j < 64; i++, j += 4)
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x[i] = (static_cast<unsigned int>(block[j])) |
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((static_cast<unsigned int>(block[j + 1])) << 8) |
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((static_cast<unsigned int>(block[j + 2])) << 16) |
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((static_cast<unsigned int>(block[j + 3])) << 24);
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const unsigned int S11{7};
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const unsigned int S12{12};
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const unsigned int S13{17};
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const unsigned int S14{22};
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const unsigned int S21{5};
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const unsigned int S22{9};
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const unsigned int S23{14};
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const unsigned int S24{20};
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const unsigned int S31{4};
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const unsigned int S32{11};
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const unsigned int S33{16};
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const unsigned int S34{23};
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const unsigned int S41{6};
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const unsigned int S42{10};
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const unsigned int S43{15};
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const unsigned int S44{21};
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// fFunc, gFunc, hFunc and iFunc are basic MD5 functions.
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auto fFunc = [](unsigned int x, unsigned int y, unsigned int z) {
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return (x & y) | (~x & z);
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};
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auto gFunc = [](unsigned int x, unsigned int y, unsigned int z) {
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return (x & z) | (y & ~z);
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};
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auto hFunc = [](unsigned int x, unsigned int y, unsigned int z) { return x ^ y ^ z; };
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auto iFunc = [](unsigned int x, unsigned int y, unsigned int z) {
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return y ^ (x | ~z);
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};
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auto rotateLeftFunc = [](unsigned int x, int n) { return (x << n) | (x >> (32 - n)); };
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// ffFunc, ggFunc, hhFunc, and iiFunc transformations for rounds 1, 2, 3, and 4.
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// Rotation is separate from addition to prevent recomputation.
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auto ffFunc = [fFunc, rotateLeftFunc](unsigned int& a, unsigned int b, unsigned int c,
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unsigned int d, unsigned int x, unsigned int s,
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unsigned int ac) {
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a = rotateLeftFunc(a + fFunc(b, c, d) + x + ac, s) + b;
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};
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auto ggFunc = [gFunc, rotateLeftFunc](unsigned int& a, unsigned int b, unsigned int c,
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unsigned int d, unsigned int x, unsigned int s,
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unsigned int ac) {
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a = rotateLeftFunc(a + gFunc(b, c, d) + x + ac, s) + b;
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};
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auto hhFunc = [hFunc, rotateLeftFunc](unsigned int& a, unsigned int b, unsigned int c,
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unsigned int d, unsigned int x, unsigned int s,
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unsigned int ac) {
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a = rotateLeftFunc(a + hFunc(b, c, d) + x + ac, s) + b;
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};
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auto iiFunc = [iFunc, rotateLeftFunc](unsigned int& a, unsigned int b, unsigned int c,
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unsigned int d, unsigned int x, unsigned int s,
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unsigned int ac) {
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a = rotateLeftFunc(a + iFunc(b, c, d) + x + ac, s) + b;
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};
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// Round 1.
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ffFunc(a, b, c, d, x[0], S11, 0xd76aa478); /* 1 */
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ffFunc(d, a, b, c, x[1], S12, 0xe8c7b756); /* 2 */
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ffFunc(c, d, a, b, x[2], S13, 0x242070db); /* 3 */
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ffFunc(b, c, d, a, x[3], S14, 0xc1bdceee); /* 4 */
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ffFunc(a, b, c, d, x[4], S11, 0xf57c0faf); /* 5 */
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ffFunc(d, a, b, c, x[5], S12, 0x4787c62a); /* 6 */
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ffFunc(c, d, a, b, x[6], S13, 0xa8304613); /* 7 */
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ffFunc(b, c, d, a, x[7], S14, 0xfd469501); /* 8 */
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ffFunc(a, b, c, d, x[8], S11, 0x698098d8); /* 9 */
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ffFunc(d, a, b, c, x[9], S12, 0x8b44f7af); /* 10 */
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ffFunc(c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
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ffFunc(b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
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ffFunc(a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
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ffFunc(d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
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ffFunc(c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
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ffFunc(b, c, d, a, x[15], S14, 0x49b40821); /* 16 */
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// Round 2.
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ggFunc(a, b, c, d, x[1], S21, 0xf61e2562); /* 17 */
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ggFunc(d, a, b, c, x[6], S22, 0xc040b340); /* 18 */
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ggFunc(c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
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ggFunc(b, c, d, a, x[0], S24, 0xe9b6c7aa); /* 20 */
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ggFunc(a, b, c, d, x[5], S21, 0xd62f105d); /* 21 */
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ggFunc(d, a, b, c, x[10], S22, 0x2441453); /* 22 */
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ggFunc(c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
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ggFunc(b, c, d, a, x[4], S24, 0xe7d3fbc8); /* 24 */
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ggFunc(a, b, c, d, x[9], S21, 0x21e1cde6); /* 25 */
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ggFunc(d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
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ggFunc(c, d, a, b, x[3], S23, 0xf4d50d87); /* 27 */
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ggFunc(b, c, d, a, x[8], S24, 0x455a14ed); /* 28 */
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ggFunc(a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
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ggFunc(d, a, b, c, x[2], S22, 0xfcefa3f8); /* 30 */
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ggFunc(c, d, a, b, x[7], S23, 0x676f02d9); /* 31 */
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ggFunc(b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */
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// Round 3.
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hhFunc(a, b, c, d, x[5], S31, 0xfffa3942); /* 33 */
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hhFunc(d, a, b, c, x[8], S32, 0x8771f681); /* 34 */
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hhFunc(c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
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hhFunc(b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
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hhFunc(a, b, c, d, x[1], S31, 0xa4beea44); /* 37 */
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hhFunc(d, a, b, c, x[4], S32, 0x4bdecfa9); /* 38 */
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hhFunc(c, d, a, b, x[7], S33, 0xf6bb4b60); /* 39 */
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hhFunc(b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
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hhFunc(a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
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hhFunc(d, a, b, c, x[0], S32, 0xeaa127fa); /* 42 */
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hhFunc(c, d, a, b, x[3], S33, 0xd4ef3085); /* 43 */
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hhFunc(b, c, d, a, x[6], S34, 0x4881d05); /* 44 */
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hhFunc(a, b, c, d, x[9], S31, 0xd9d4d039); /* 45 */
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hhFunc(d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
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hhFunc(c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
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hhFunc(b, c, d, a, x[2], S34, 0xc4ac5665); /* 48 */
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// Round 4.
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iiFunc(a, b, c, d, x[0], S41, 0xf4292244); /* 49 */
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iiFunc(d, a, b, c, x[7], S42, 0x432aff97); /* 50 */
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iiFunc(c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
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iiFunc(b, c, d, a, x[5], S44, 0xfc93a039); /* 52 */
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iiFunc(a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
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iiFunc(d, a, b, c, x[3], S42, 0x8f0ccc92); /* 54 */
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iiFunc(c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
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iiFunc(b, c, d, a, x[1], S44, 0x85845dd1); /* 56 */
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iiFunc(a, b, c, d, x[8], S41, 0x6fa87e4f); /* 57 */
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iiFunc(d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
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iiFunc(c, d, a, b, x[6], S43, 0xa3014314); /* 59 */
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iiFunc(b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
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iiFunc(a, b, c, d, x[4], S41, 0xf7537e82); /* 61 */
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iiFunc(d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
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iiFunc(c, d, a, b, x[2], S43, 0x2ad7d2bb); /* 63 */
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iiFunc(b, c, d, a, x[9], S44, 0xeb86d391); /* 64 */
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state[0] += a;
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state[1] += b;
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state[2] += c;
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state[3] += d;
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}
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} // namespace Math
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@ -13,6 +13,7 @@
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#include <glm/ext/matrix_clip_space.hpp>
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#include <glm/ext/matrix_transform.hpp>
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#include <glm/trigonometric.hpp>
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#include <string>
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namespace Utils
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{
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@ -21,17 +22,26 @@ namespace Utils
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float smoothStep(const float left, const float right, const float value);
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float smootherStep(const float left, const float right, const float value);
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namespace Scroll
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{
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float bounce(const float delayTime,
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const float scrollTime,
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const float currentTime,
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const float scrollLength);
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// Used for horizontal scrolling, e.g. long names in TextListComponent.
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float loop(const float delayTime,
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const float scrollTime,
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const float currentTime,
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const float scrollLength);
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} // namespace Scroll
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// Variation of the loop, with an acceleration and deceleration at the start and ending.
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float bounce(const float delayTime,
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const float scrollTime,
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const float currentTime,
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const float scrollLength);
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// The MD5 functions are derived from the RSA Data Security, Inc. MD5 Message-Digest
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// Algorithm. Based on this code: https://github.com/yaoyao-cn/md5/blob/master/md5.cpp
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std::string md5Hash(const std::string& data);
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void md5Update(const unsigned char* buf,
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unsigned int length,
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unsigned int (&state)[4],
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unsigned int (&count)[2],
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unsigned char (&buffer)[64]);
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void md5Transform(const unsigned char block[64], unsigned int (&state)[4]);
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} // namespace Math
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