Initial commit: SUB-OS 64-Bit Production Monolithic Operating System with LazyBox userland suite

include/crypto/crypto.h

@@ -0,0 +1,42 @@
+#ifndef _CRYPTO_CRYPTO_H
+#define _CRYPTO_CRYPTO_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+// CRC32 API
+uint32_t crc32(uint32_t crc, const void* buf, size_t size);
+
+// MD5 API
+typedef struct {
+    uint32_t state[4];
+    uint32_t count[2];
+    uint8_t  buffer[64];
+} md5_ctx_t;
+
+void md5_init(md5_ctx_t* ctx);
+void md5_update(md5_ctx_t* ctx, const void* input, size_t input_len);
+void md5_final(uint8_t digest[16], md5_ctx_t* ctx);
+void md5_string(const char* str, char output[33]);
+
+// SHA-256 API
+typedef struct {
+    uint32_t state[8];
+    uint64_t bitlen;
+    uint8_t  buffer[64];
+    size_t   datalen;
+} sha256_ctx_t;
+
+void sha256_init(sha256_ctx_t* ctx);
+void sha256_update(sha256_ctx_t* ctx, const void* data, size_t len);
+void sha256_final(uint8_t hash[32], sha256_ctx_t* ctx);
+void sha256_string(const char* str, char output[65]);
+
+// PRNG (Cryptographic Pseudo-Random Number Generator)
+void prng_seed(uint64_t seed1, uint64_t seed2);
+uint64_t prng_rand64(void);
+uint32_t prng_rand32(void);
+void prng_get_bytes(void* buf, size_t len);
+
+#endif // _CRYPTO_CRYPTO_H