Development

README.md

@@ -4,7 +4,6 @@
 
 ---
 
-- Roadmap/Features: [here!](docs/ROADMAP.md)
 - How it works: [here!](docs/ARCHITECTURE.md)
 - Development Guide: [here!](docs/DEVELOPMENT.md)
 
@@ -60,7 +59,7 @@ cd VoidFrame
 mkdir build
 cd build
 cmake .. -DCMAKE_BUILD_TYPE=Release \
-    -DCMAKE_TOOLCHAIN_FILE=../cmake/toolchain/<linux/windows/macos>-x64.cmake \
+    -DCMAKE_TOOLCHAIN_FILE=../cmake/toolchain/linux-x64.cmake \
     -G Ninja \
     -DVF_SCHEDULER=<MLFQ/EEVDF>
 ccmake . # Optinal, tune as needed
@@ -138,6 +137,12 @@ ninja run
     - [x] Create
     - [x] Delete
     - [x] List
+- DEVFS
+    - [x] Read
+    - [x] Write
+    - [x] Create (register)
+    - [ ] Delete (unregister)
+    - [x] List
 - ISO9660 (RO)
     - [x] Read
     - [x] List
@@ -146,6 +151,7 @@ ninja run
     - [x] EXT2
     - [x] FAT1x
     - [x] VFRFS
+    - [ ] DEVFS
     - [ ] ISO9660 
 ### Drivers
 - Network

cmake/source.cmake

@@ -76,6 +76,8 @@ set(FS_SOURCES
         fs/FileSystem.c
         fs/MBR.c
         fs/DriveNaming.c
+        fs/CharDevice.c
+        fs/devfs/DevFS.c
 )
 
 set(DRIVER_SOURCES
@@ -122,6 +124,12 @@ set(INCLUDE_SOURCES
         include/Io.c
 )
 
+set(CRYPTO_SOURCES
+        crypto/RNG.c
+        crypto/CRC32.c
+        crypto/SHA256.c
+)
+
 set(CPP_SOURCES
         ports/6502/6502.cpp
 )
@@ -165,6 +173,7 @@ include_directories(
         fs/FAT
         fs/EXT
         fs/NTFS
+        fs/devfs
         mm
         mm/dynamic
         mm/dynamic/c
@@ -181,6 +190,7 @@ include_directories(
         arch/x86_64/syscall
         vfcompositor
         vfcompositor/app
+        crypto
 )
 
 # ============================================================================
@@ -209,4 +219,5 @@ set(C_SOURCES
         ${ARCH_SOURCES}
         ${INCLUDE_SOURCES}
         ${VFC_SOURCES}
+        ${CRYPTO_SOURCES}
 )

crypto/CRC32.c

@@ -0,0 +1,35 @@
+#include "CRC32.h"
+
+static uint32_t crc32_table[256];
+
+void CRC32Init() {
+    uint32_t polynomial = 0xEDB88320;
+    for (uint32_t i = 0; i < 256; i++) {
+        uint32_t c = i;
+        for (size_t j = 0; j < 8; j++) {
+            if (c & 1) {
+                c = polynomial ^ (c >> 1);
+            } else {
+                c >>= 1;
+            }
+        }
+        crc32_table[i] = c;
+    }
+}
+
+uint32_t CRC32(const void* data, size_t length) {
+    static int table_generated = 0;
+    if (!table_generated) {
+        CRC32Init();
+        table_generated = 1;
+    }
+
+    uint32_t crc = 0xFFFFFFFF;
+    const uint8_t* p = (const uint8_t*)data;
+
+    for (size_t i = 0; i < length; i++) {
+        crc = crc32_table[(crc ^ p[i]) & 0xFF] ^ (crc >> 8);
+    }
+
+    return crc ^ 0xFFFFFFFF;
+}

crypto/CRC32.h

@@ -0,0 +1,10 @@
+#ifndef VOIDFRAME_CRC32_H
+#define VOIDFRAME_CRC32_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+uint32_t CRC32(const void* data, size_t length);
+void CRC32Init();
+
+#endif //VOIDFRAME_CRC32_H

crypto/RNG.c

@@ -0,0 +1,57 @@
+#include "RNG.h"
+#include "Io.h"
+
+static uint64_t s[2]; // state
+
+static inline uint64_t rotl(const uint64_t x, int k) {
+    return (x << k) | (x >> (64 - k));
+}
+
+uint64_t xoroshiro128plus(void) {
+    uint64_t s0 = s[0];
+    uint64_t s1 = s[1];
+    uint64_t result = s0 + s1;
+    s1 ^= s0;
+    s[0] = rotl(s0, 55) ^ s1 ^ (s1 << 14);
+    s[1] = rotl(s1, 36);
+    return result;
+}
+
+static uint64_t splitmix64(uint64_t* x) {
+    *x += 0x9e3779b97f4a7c15ULL;
+    uint64_t z = *x;
+    z = (z ^ (z >> 30)) * 0xbf58476d1ce4e5b9ULL;
+    z = (z ^ (z >> 27)) * 0x94d049bb133111ebULL;
+    return z ^ (z >> 31);
+}
+
+void rng_seed(uint64_t seed_lo, uint64_t seed_hi) {
+    uint64_t seed = seed_lo ^ (seed_hi + 0x9e3779b97f4a7c15ULL);
+    s[0] ^= splitmix64(&seed);
+    s[1] ^= splitmix64(&seed);
+    if ((s[0] | s[1]) == 0) s[0] = 0x8a5cd789635d2dffULL; // ensure non-zero state
+}
+
+int rdrand_supported(void) {
+    uint32_t eax, ebx, ecx, edx;
+    cpuid(1, &eax, &ebx, &ecx, &edx);
+    return (ecx & (1u << 30)) != 0;
+}
+
+uint16_t rdrand16(void) {
+    uint16_t r;
+    __asm__ volatile("rdrand %0" : "=r"(r));
+    return r;
+}
+
+uint32_t rdrand32(void) {
+    uint32_t r;
+    __asm__ volatile("rdrand %0" : "=r"(r));
+    return r;
+}
+
+uint64_t rdrand64(void) {
+    uint64_t r;
+    __asm__ volatile("rdrand %0" : "=r"(r));
+    return r;
+}

crypto/RNG.h

@@ -0,0 +1,14 @@
+#ifndef VOIDFRAME_RNG_H
+#define VOIDFRAME_RNG_H
+#include "stdint.h"
+
+void rng_seed(uint64_t a, uint64_t b);
+uint64_t xoroshiro128plus();
+
+int rdrand_supported(void);
+
+uint16_t rdrand16(void);
+uint32_t rdrand32(void);
+uint64_t rdrand64(void);
+
+#endif //VOIDFRAME_RNG_H

crypto/SHA256.c

@@ -0,0 +1,124 @@
+
+#include "SHA256.h"
+#include "MemOps.h"
+
+#define ROTR(x, n) (((x) >> (n)) | ((x) << (32 - (n))))
+#define CH(x, y, z) (((x) & (y)) ^ (~(x) & (z)))
+#define MAJ(x, y, z) (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
+#define EP0(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
+#define EP1(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
+#define SIG0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ ((x) >> 3))
+#define SIG1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ ((x) >> 10))
+
+static const uint32_t 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 void SHA256Transform(SHA256_CTX *ctx, const uint8_t data[]) {
+    uint32_t a, b, c, d, e, f, g, h, i, j, t1, t2, m[64];
+
+    for (i = 0, j = 0; i < 16; ++i, j += 4)
+        m[i] = (data[j] << 24) | (data[j + 1] << 16) | (data[j + 2] << 8) | (data[j + 3]);
+
+    for (; i < 64; ++i)
+        m[i] = SIG1(m[i - 2]) + m[i - 7] + SIG0(m[i - 15]) + m[i - 16];
+
+    a = ctx->state[0];
+    b = ctx->state[1];
+    c = ctx->state[2];
+    d = ctx->state[3];
+    e = ctx->state[4];
+    f = ctx->state[5];
+    g = ctx->state[6];
+    h = ctx->state[7];
+
+    for (i = 0; i < 64; ++i) {
+        t1 = h + EP1(e) + CH(e, f, g) + k[i] + m[i];
+        t2 = EP0(a) + MAJ(a, b, c);
+        h = g;
+        g = f;
+        f = e;
+        e = d + t1;
+        d = c;
+        c = b;
+        b = a;
+        a = t1 + t2;
+    }
+
+    ctx->state[0] += a;
+    ctx->state[1] += b;
+    ctx->state[2] += c;
+    ctx->state[3] += d;
+    ctx->state[4] += e;
+    ctx->state[5] += f;
+    ctx->state[6] += g;
+    ctx->state[7] += h;
+}
+
+void SHA256Init(SHA256_CTX *ctx) {
+    ctx->datalen = 0;
+    ctx->bitlen = 0;
+    ctx->state[0] = 0x6a09e667;
+    ctx->state[1] = 0xbb67ae85;
+    ctx->state[2] = 0x3c6ef372;
+    ctx->state[3] = 0xa54ff53a;
+    ctx->state[4] = 0x510e527f;
+    ctx->state[5] = 0x9b05688c;
+    ctx->state[6] = 0x1f83d9ab;
+    ctx->state[7] = 0x5be0cd19;
+}
+
+void SHA256Update(SHA256_CTX *ctx, const uint8_t data[], size_t len) {
+    for (size_t i = 0; i < len; ++i) {
+        ctx->data[ctx->datalen] = data[i];
+        ctx->datalen++;
+        if (ctx->datalen == 64) {
+            SHA256Transform(ctx, ctx->data);
+            ctx->bitlen += 512;
+            ctx->datalen = 0;
+        }
+    }
+}
+
+void SHA256Final(SHA256_CTX *ctx, uint8_t hash[]) {
+    uint32_t i = ctx->datalen;
+
+    ctx->data[i++] = 0x80;
+
+    if (ctx->datalen < 56) {
+        FastMemset(ctx->data + i, 0, 56 - i);
+    } else {
+        FastMemset(ctx->data + i, 0, 64 - i);
+        SHA256Transform(ctx, ctx->data);
+        FastMemset(ctx->data, 0, 56);
+    }
+
+    ctx->bitlen += ctx->datalen * 8;
+    ctx->data[63] = ctx->bitlen;
+    ctx->data[62] = ctx->bitlen >> 8;
+    ctx->data[61] = ctx->bitlen >> 16;
+    ctx->data[60] = ctx->bitlen >> 24;
+    ctx->data[59] = ctx->bitlen >> 32;
+    ctx->data[58] = ctx->bitlen >> 40;
+    ctx->data[57] = ctx->bitlen >> 48;
+    ctx->data[56] = ctx->bitlen >> 56;
+    SHA256Transform(ctx, ctx->data);
+
+    for (i = 0; i < 4; ++i) {
+        hash[i]      = (ctx->state[0] >> (24 - i * 8)) & 0xff;
+        hash[i + 4]  = (ctx->state[1] >> (24 - i * 8)) & 0xff;
+        hash[i + 8]  = (ctx->state[2] >> (24 - i * 8)) & 0xff;
+        hash[i + 12] = (ctx->state[3] >> (24 - i * 8)) & 0xff;
+        hash[i + 16] = (ctx->state[4] >> (24 - i * 8)) & 0xff;
+        hash[i + 20] = (ctx->state[5] >> (24 - i * 8)) & 0xff;
+        hash[i + 24] = (ctx->state[6] >> (24 - i * 8)) & 0xff;
+        hash[i + 28] = (ctx->state[7] >> (24 - i * 8)) & 0xff;
+    }
+}

crypto/SHA256.h

@@ -0,0 +1,20 @@
+#ifndef VOIDFRAME_SHA256_H
+#define VOIDFRAME_SHA256_H
+
+#include <stdint.h>
+#include <stddef.h>
+
+#define SHA256_BLOCK_SIZE 32
+
+typedef struct {
+    uint8_t data[64];
+    uint32_t datalen;
+    uint64_t bitlen;
+    uint32_t state[8];
+} SHA256_CTX;
+
+void sha256_init(SHA256_CTX *ctx);
+void SHA256Update(SHA256_CTX *ctx, const uint8_t data[], size_t len);
+void SHA256Final(SHA256_CTX *ctx, uint8_t hash[]);
+
+#endif //VOIDFRAME_SHA256_H