diff --git a/src/raylib.h b/src/raylib.h index c57efc2e16a0..700a362508b9 100644 --- a/src/raylib.h +++ b/src/raylib.h @@ -1164,6 +1164,7 @@ RLAPI unsigned char *DecodeDataBase64(const char *text, int *outputSize); 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 b9098db02c8b..7d4a28b85d8d 100644 --- a/src/rcore.c +++ b/src/rcore.c @@ -3080,6 +3080,93 @@ 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 SHA256_ROTR_32(x, n) (((x) >> (n)) | ((x) << (32 - (n)))) + static unsigned int result[8]; + if (!data || dataSize < 0){ + return NULL; + } + + unsigned int h[8] = { + 0x6a09e667u, 0xbb67ae85u, 0x3c6ef372u, 0xa54ff53au, + 0x510e527fu, 0x9b05688cu, 0x1f83d9abu, 0x5be0cd19u + }; + + const unsigned int k[64] = { + 0x428a2f98u, 0x71374491u, 0xb5c0fbcfu, 0xe9b5dba5u, 0x3956c25bu, 0x59f111f1u, 0x923f82a4u, 0xab1c5ed5u, + 0xd807aa98u, 0x12835b01u, 0x243185beu, 0x550c7dc3u, 0x72be5d74u, 0x80deb1feu, 0x9bdc06a7u, 0xc19bf174u, + 0xe49b69c1u, 0xefbe4786u, 0x0fc19dc6u, 0x240ca1ccu, 0x2de92c6fu, 0x4a7484aau, 0x5cb0a9dcu, 0x76f988dau, + 0x983e5152u, 0xa831c66du, 0xb00327c8u, 0xbf597fc7u, 0xc6e00bf3u, 0xd5a79147u, 0x06ca6351u, 0x14292967u, + 0x27b70a85u, 0x2e1b2138u, 0x4d2c6dfcu, 0x53380d13u, 0x650a7354u, 0x766a0abbu, 0x81c2c92eu, 0x92722c85u, + 0xa2bfe8a1u, 0xa81a664bu, 0xc24b8b70u, 0xc76c51a3u, 0xd192e819u, 0xd6990624u, 0xf40e3585u, 0x106aa070u, + 0x19a4c116u, 0x1e376c08u, 0x2748774cu, 0x34b0bcb5u, 0x391c0cb3u, 0x4ed8aa4au, 0x5b9cca4fu, 0x682e6ff3u, + 0x748f82eeu, 0x78a5636fu, 0x84c87814u, 0x8cc70208u, 0x90befffau, 0xa4506cebu, 0xbef9a3f7u, 0xc67178f2u + }; + + unsigned long long bit_len = (unsigned long long)dataSize * 8U; + long long pad_len = ((56LL - (((long long)dataSize + 1) % 64) + 64) % 64); + unsigned int total_len = (unsigned long long)dataSize + 1 + pad_len + 8; + unsigned char *buf = (unsigned char *)RL_CALLOC(total_len, 1); + if (!buf){ + return NULL; + } + + memcpy(buf, data, (unsigned long long)dataSize); + buf[dataSize] = 0x80u; + for (int i = 0; i < 8; ++i){ + buf[(dataSize + 1LL) + pad_len + i] = (unsigned char)((bit_len >> (56 - 8 * i)) & 0xFFu); + } + + unsigned long long num_blocks = total_len / 64; + for (unsigned long long blk = 0; blk < num_blocks; ++blk) { + const unsigned char *chunk = buf + blk * 64; + unsigned int w[64]; + for (int t = 0; t < 16; ++t){ + w[t] = ((unsigned int)chunk[t * 4 + 0] << 24) | ((unsigned int)chunk[t * 4 + 1] << 16) | + ((unsigned int)chunk[t * 4 + 2] << 8) | ((unsigned int)chunk[t * 4 + 3]); + } + for (int t = 16; t < 64; ++t) { + unsigned int s0 = SHA256_ROTR_32(w[t - 15], 7) ^ SHA256_ROTR_32(w[t - 15], 18) ^ (w[t - 15] >> 3); + unsigned int s1 = SHA256_ROTR_32(w[t - 2], 17) ^ SHA256_ROTR_32(w[t - 2], 19) ^ (w[t - 2] >> 10); + w[t] = w[t - 16] + s0 + w[t - 7] + s1; + } + unsigned int a = h[0], b = h[1], c = h[2], d = h[3], e = h[4], f = h[5], g = h[6], hh = h[7]; + for (int t = 0; t < 64; ++t) { + unsigned int S1 = SHA256_ROTR_32(e, 6) ^ SHA256_ROTR_32(e, 11) ^ SHA256_ROTR_32(e, 25); + unsigned int ch = (e & f) ^ ((~e) & g); + unsigned int temp1 = hh + S1 + ch + k[t] + w[t]; + unsigned int S0 = SHA256_ROTR_32(a, 2) ^ SHA256_ROTR_32(a, 13) ^ SHA256_ROTR_32(a, 22); + unsigned int maj = (a & b) ^ (a & c) ^ (b & c); + unsigned int temp2 = S0 + maj; + hh = g; + g = f; + f = e; + e = d + temp1; + d = c; + c = b; + b = a; + a = temp1 + temp2; + } + h[0] += a; + h[1] += b; + h[2] += c; + h[3] += d; + h[4] += e; + h[5] += f; + h[6] += g; + h[7] += hh; + } + + RL_FREE(buf); + for (int i = 0; i < 8; ++i){ + result[i] = (unsigned int)h[i]; + } + return result; + #undef SHA256_ROTR_32 +} + //---------------------------------------------------------------------------------- // Module Functions Definition: Automation Events Recording and Playing //----------------------------------------------------------------------------------