TEA test files

test/tea-decrypt.c

@@ -0,0 +1,27 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+void decrypt(uint32_t *v, uint32_t *k) {
+  uint32_t v0 = v[0], v1 = v[1], sum = 0xC6EF3720, i; /* set up */
+  uint32_t delta = 0x9e3779b9; /* a key schedule constant */
+  uint32_t k0 = k[0], k1 = k[1], k2 = k[2], k3 = k[3]; /* cache key */
+  for (i = 0; i < 32; i++) {                           /* basic cycle start */
+    v1 -= ((v0 << 4) + k2) ^ (v0 + sum) ^ ((v0 >> 5) + k3);
+    v0 -= ((v1 << 4) + k0) ^ (v1 + sum) ^ ((v1 >> 5) + k1);
+    sum -= delta;
+  } /* end cycle */
+  v[0] = v0;
+  v[1] = v1;
+}
+
+int main(int argc, char *argv[]) {
+  if (argc != 3) {
+      printf("Usage: %s text_to_decrypt key", argv[0]);
+      exit(1);
+  }
+  decrypt((uint32_t*)argv[1], (uint32_t*)argv[2]);
+  printf("Result: %s", argv[1]);
+  return 0;
+}

test/tea-encrypt.c

@@ -0,0 +1,39 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+
+void encrypt(uint32_t *v, uint32_t *k) {
+  uint32_t v0 = v[0], v1 = v[1], sum = 0, i; /* set up */
+  uint32_t delta = 0x9e3779b9;               /* a key schedule constant */
+  uint32_t k0 = k[0], k1 = k[1], k2 = k[2], k3 = k[3]; /* cache key */
+  for (i = 0; i < 32; i++) {                           /* basic cycle start */
+    sum += delta;
+    v0 += ((v1 << 4) + k0) ^ (v1 + sum) ^ ((v1 >> 5) + k1);
+    v1 += ((v0 << 4) + k2) ^ (v0 + sum) ^ ((v0 >> 5) + k3);
+  } /* end cycle */
+  v[0] = v0;
+  v[1] = v1;
+}
+
+int main(int argc, char *argv[]) {
+  uint8_t * buf;
+  uint32_t buflen, i;
+
+  if (argc != 3) {
+    printf("Usage: %s text_to_encrypt key", argv[0]);
+    exit(1);
+  }
+  buflen = strlen(argv[1]);
+  buf = (uint8_t *)malloc(buflen);
+  memcpy(buf, argv[1], buflen);
+  encrypt((uint32_t*)buf, (uint32_t *)argv[2]);
+  printf("Result:\n");
+  for (i = 0; i< buflen; i++) {
+    printf("%02x", buf[i]);
+  }
+  printf("\n");
+  return 0;
+}