#include #include #include #include #include void encrypt(uint16_t *v) { uint16_t v0 = v[0], v1 = v[1], i; uint16_t k0 = 0x7065; // "pe" uint16_t k1 = 0x7065; // "pe" uint16_t k2 = 0x7275; // "ru" uint16_t k3 = 0x6e73; // "ns" for (i = 0; i < 128; i++) { v0 += ((v1 << 4) + k0) ^ (v1) ^ ((v1 >> 5) + k1); v1 += ((v0 << 4) + k2) ^ (v0) ^ ((v0 >> 5) + k3); } v[0] = v0; v[1] = v1; } int main(int argc, char *argv[]) { uint8_t *buf; uint32_t buflen, i; FILE *f; if (argc != 2) { printf("Usage: %s text_to_encrypt", argv[0]); exit(1); } buflen = strlen(argv[1]); buf = (uint8_t *)malloc(buflen); memcpy(buf, argv[1], buflen); for (i = 0; i < buflen && i + 2 * (sizeof(uint16_t)) <= buflen; i += sizeof(uint32_t)) { encrypt((uint16_t *)&buf[i]); } write(1, buf, buflen); return 0; }