From 17bc628fd9a290cc54c5aaf2a8ce74ec56569a27 Mon Sep 17 00:00:00 2001 From: JohnnyCena123 Date: Wed, 15 Oct 2025 20:07:41 +0300 Subject: [PATCH] [rcore] Add `ComputeSHA256()` function (#5264) * [rcore] Add `ComputeSHA256()` function * adjust function signatures * review issues * fix repeating 0 * fix mistake * fixed macro * remove undefs * review styling mismatches * rename `A0,1` to `SHA256_A0,1` --------- Co-authored-by: CrackedPixel <5776225+CrackedPixel@users.noreply.github.com> --- src/raylib.h | 7 ++-- src/rcore.c | 102 +++++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 106 insertions(+), 3 deletions(-) diff --git a/src/raylib.h b/src/raylib.h index c57efc2e1..e4be11084 100644 --- a/src/raylib.h +++ b/src/raylib.h @@ -1161,9 +1161,10 @@ RLAPI unsigned char *CompressData(const unsigned char *data, int dataSize, int * RLAPI unsigned char *DecompressData(const unsigned char *compData, int compDataSize, int *dataSize); // Decompress data (DEFLATE algorithm), memory must be MemFree() RLAPI char *EncodeDataBase64(const unsigned char *data, int dataSize, int *outputSize); // Encode data to Base64 string (includes NULL terminator), memory must be MemFree() RLAPI unsigned char *DecodeDataBase64(const char *text, int *outputSize); // Decode Base64 string (expected NULL terminated), memory must be MemFree() -RLAPI unsigned int ComputeCRC32(unsigned char *data, int dataSize); // Compute CRC32 hash code -RLAPI unsigned int *ComputeMD5(unsigned char *data, int dataSize); // Compute MD5 hash code, returns static int[4] (16 bytes) -RLAPI unsigned int *ComputeSHA1(unsigned char *data, int dataSize); // Compute SHA1 hash code, returns static int[5] (20 bytes) +RLAPI unsigned int ComputeCRC32(unsigned char *data, int dataSize); // Compute CRC32 hash code +RLAPI unsigned int *ComputeMD5(unsigned char *data, int dataSize); // Compute MD5 hash code, returns static int[4] (16 bytes) +RLAPI unsigned int *ComputeSHA1(unsigned char *data, int dataSize); // Compute SHA1 hash code, returns static int[5] (20 bytes) +RLAPI unsigned int *ComputeSHA256(unsigned char *data, int dataSize); // Compute SHA256 hash code, returns static int[8] (32 bytes) // Automation events functionality RLAPI AutomationEventList LoadAutomationEventList(const char *fileName); // Load automation events list from file, NULL for empty list, capacity = MAX_AUTOMATION_EVENTS diff --git a/src/rcore.c b/src/rcore.c index 3b2535250..f1c975c21 100644 --- a/src/rcore.c +++ b/src/rcore.c @@ -3078,6 +3078,108 @@ unsigned int *ComputeSHA1(unsigned char *data, int dataSize) return hash; } +// Compute SHA-256 hash code +// NOTE: Returns a static int[8] array (32 bytes) +unsigned int *ComputeSHA256(unsigned char *data, int dataSize) +{ + #define ROTATE_RIGHT(x, c) ((x >> c) | (x << ((sizeof(unsigned int) * 8) - c))) + #define SHA256_A0(x) (ROTATE_RIGHT(x, 7) ^ ROTATE_RIGHT(x, 18) ^ (x >> 3)) + #define SHA256_A1(x) (ROTATE_RIGHT(x, 17) ^ ROTATE_RIGHT(x, 19) ^ (x >> 10)) + + static const unsigned int k[64] = { + 0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5, + 0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5, + 0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3, + 0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174, + 0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc, + 0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da, + 0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7, + 0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967, + 0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13, + 0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85, + 0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3, + 0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070, + 0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5, + 0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3, + 0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208, + 0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2 + }; + + static unsigned int hash[8]; + hash[0] = 0x6A09e667; + hash[1] = 0xbb67ae85; + hash[2] = 0x3c6ef372; + hash[3] = 0xa54ff53a; + hash[4] = 0x510e527f; + hash[5] = 0x9b05688c; + hash[6] = 0x1f83d9ab; + hash[7] = 0x5be0cd19; + + const unsigned long long int bitLen = ((unsigned long long int)dataSize)*8; + unsigned long long int paddedSize = dataSize + sizeof(dataSize); + paddedSize += (64 - (paddedSize%64)); + unsigned char *buffer = RL_CALLOC(paddedSize, sizeof(unsigned char)); + + memcpy(buffer, data, dataSize); + buffer[dataSize] = 0x80; + for (int i = 1; i <= sizeof(bitLen); i++) + buffer[(paddedSize - sizeof(bitLen)) + (i - 1)] = (bitLen >> (8*(sizeof(bitLen) - i))) & 0xFF; + + for (unsigned long long int blockN = 0; blockN < paddedSize/64; blockN++) + { + unsigned int a = hash[0]; + unsigned int b = hash[1]; + unsigned int c = hash[2]; + unsigned int d = hash[3]; + unsigned int e = hash[4]; + unsigned int f = hash[5]; + unsigned int g = hash[6]; + unsigned int h = hash[7]; + + unsigned char *block = buffer + (blockN*64); + unsigned int w[64]; + for (int i = 0; i < 16; i++) + { + w[i] = + ((unsigned int)block[i*4 + 0] << 24) | + ((unsigned int)block[i*4 + 1] << 16) | + ((unsigned int)block[i*4 + 2] << 8) | + ((unsigned int)block[i*4 + 3]); + } + for (int t = 16; t < 64; t++) w[t] = SHA256_A1(w[t - 2]) + w[t - 7] + SHA256_A0(w[t - 15]) + w[t - 16]; + + for (unsigned long long int t = 0; t < 64; t++) + { + unsigned int e1 = (ROTATE_RIGHT(e, 6) ^ ROTATE_RIGHT(e, 11) ^ ROTATE_RIGHT(e, 25)); + unsigned int ch = ((e & f) ^ (~e & g)); + unsigned int t1 = (h + e1 + ch + k[t] + w[t]); + unsigned int e0 = (ROTATE_RIGHT(a, 2) ^ ROTATE_RIGHT(a, 13) ^ ROTATE_RIGHT(a, 22)); + unsigned int maj = ((a & b) ^ (a & c) ^ (b & c)); + unsigned int t2 = e0 + maj; + + h = g; + g = f; + f = e; + e = d + t1; + d = c; + c = b; + b = a; + a = t1 + t2; + } + + hash[0] += a; + hash[1] += b; + hash[2] += c; + hash[3] += d; + hash[4] += e; + hash[5] += f; + hash[6] += g; + hash[7] += h; + } + RL_FREE(buffer); + return hash; +} + //---------------------------------------------------------------------------------- // Module Functions Definition: Automation Events Recording and Playing //----------------------------------------------------------------------------------