test: Host-Testumgebung mit Unity, SHA256 und CRC

2026-09-11 12:23:04 +02:00
parent 23df6b9d29
commit 4e7ff78fc6
8 changed files with 304 additions and 0 deletions
@@ -0,0 +1,25 @@
+#include "util/nl_crc.h"
+
+uint32_t nl_crc32(uint32_t crc, const void *data, size_t len)
+{
+    const uint8_t *p = (const uint8_t *)data;
+    crc = ~crc;
+    while (len--) {
+        crc ^= *p++;
+        for (int k = 0; k < 8; k++)
+            crc = (crc >> 1) ^ (0xEDB88320u & (0u - (crc & 1u)));
+    }
+    return ~crc;
+}
+
+uint8_t nl_crc8(const void *data, size_t len)
+{
+    const uint8_t *p = (const uint8_t *)data;
+    uint8_t crc = 0;
+    while (len--) {
+        crc ^= *p++;
+        for (int k = 0; k < 8; k++)
+            crc = (uint8_t)((crc & 0x80u) ? (crc << 1) ^ 0x07u : (crc << 1));
+    }
+    return crc;
+}
@@ -0,0 +1,13 @@
+#ifndef NL_CRC_H
+#define NL_CRC_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+/* CRC-32 (IEEE 802.3, reflected, poly 0xEDB88320). Start with crc = 0; chainable. */
+uint32_t nl_crc32(uint32_t crc, const void *data, size_t len);
+
+/* CRC-8 (poly 0x07, init 0x00, no reflection). */
+uint8_t nl_crc8(const void *data, size_t len);
+
+#endif
@@ -0,0 +1,96 @@
+#include "util/nl_sha256.h"
+
+#include <string.h>
+
+#define ROR(x, n) (((x) >> (n)) | ((x) << (32 - (n))))
+
+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 transform(nl_sha256_ctx *c, const uint8_t *p)
+{
+    uint32_t w[64];
+    uint32_t a, b, cc, d, e, f, g, h;
+    int i;
+
+    for (i = 0; i < 16; i++)
+        w[i] = ((uint32_t)p[4 * i] << 24) | ((uint32_t)p[4 * i + 1] << 16) |
+               ((uint32_t)p[4 * i + 2] << 8) | (uint32_t)p[4 * i + 3];
+    for (i = 16; i < 64; i++) {
+        uint32_t s0 = ROR(w[i - 15], 7) ^ ROR(w[i - 15], 18) ^ (w[i - 15] >> 3);
+        uint32_t s1 = ROR(w[i - 2], 17) ^ ROR(w[i - 2], 19) ^ (w[i - 2] >> 10);
+        w[i] = w[i - 16] + s0 + w[i - 7] + s1;
+    }
+
+    a = c->state[0]; b = c->state[1]; cc = c->state[2]; d = c->state[3];
+    e = c->state[4]; f = c->state[5]; g = c->state[6]; h = c->state[7];
+
+    for (i = 0; i < 64; i++) {
+        uint32_t S1 = ROR(e, 6) ^ ROR(e, 11) ^ ROR(e, 25);
+        uint32_t ch = (e & f) ^ (~e & g);
+        uint32_t t1 = h + S1 + ch + K[i] + w[i];
+        uint32_t S0 = ROR(a, 2) ^ ROR(a, 13) ^ ROR(a, 22);
+        uint32_t maj = (a & b) ^ (a & cc) ^ (b & cc);
+        uint32_t t2 = S0 + maj;
+        h = g; g = f; f = e; e = d + t1;
+        d = cc; cc = b; b = a; a = t1 + t2;
+    }
+
+    c->state[0] += a; c->state[1] += b; c->state[2] += cc; c->state[3] += d;
+    c->state[4] += e; c->state[5] += f; c->state[6] += g; c->state[7] += h;
+}
+
+void nl_sha256_init(nl_sha256_ctx *c)
+{
+    static const uint32_t H0[8] = {0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a,
+                                   0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
+    memcpy(c->state, H0, sizeof H0);
+    c->bitlen = 0;
+    c->buflen = 0;
+}
+
+void nl_sha256_update(nl_sha256_ctx *c, const void *data, size_t len)
+{
+    const uint8_t *p = (const uint8_t *)data;
+    while (len--) {
+        c->buf[c->buflen++] = *p++;
+        if (c->buflen == 64) {
+            transform(c, c->buf);
+            c->bitlen += 512;
+            c->buflen = 0;
+        }
+    }
+}
+
+void nl_sha256_final(nl_sha256_ctx *c, uint8_t out[32])
+{
+    uint32_t i = c->buflen;
+
+    c->bitlen += (uint64_t)c->buflen * 8u;
+    c->buf[i++] = 0x80;
+    if (i > 56) {
+        while (i < 64)
+            c->buf[i++] = 0;
+        transform(c, c->buf);
+        i = 0;
+    }
+    while (i < 56)
+        c->buf[i++] = 0;
+    for (int k = 0; k < 8; k++)
+        c->buf[63 - k] = (uint8_t)(c->bitlen >> (8 * k));
+    transform(c, c->buf);
+
+    for (int k = 0; k < 8; k++) {
+        out[4 * k]     = (uint8_t)(c->state[k] >> 24);
+        out[4 * k + 1] = (uint8_t)(c->state[k] >> 16);
+        out[4 * k + 2] = (uint8_t)(c->state[k] >> 8);
+        out[4 * k + 3] = (uint8_t)(c->state[k]);
+    }
+}
@@ -0,0 +1,18 @@
+#ifndef NL_SHA256_H
+#define NL_SHA256_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+typedef struct {
+    uint32_t state[8];
+    uint64_t bitlen;
+    uint8_t  buf[64];
+    uint32_t buflen;
+} nl_sha256_ctx;
+
+void nl_sha256_init(nl_sha256_ctx *c);
+void nl_sha256_update(nl_sha256_ctx *c, const void *data, size_t len);
+void nl_sha256_final(nl_sha256_ctx *c, uint8_t out[32]);
+
+#endif