1 files changed, 47 insertions, 0 deletions
diff --git a/include/crypt.h b/include/crypt.h
new file mode 100644
index 0000000..f9ec877
--- /dev/null
+++ b/include/crypt.h
@@ -0,0 +1,47 @@
+#ifndef CRYPT_H_INCLUDED
+#define CRYPT_H_INCLUDED
+
+#include <stdint.h>
+
+
+/* a possible encrypted function should use this macro */
+#define POSSIBLE_CRYPT_FUNC(func, ...) \
+    printf("FUNC-PTR: %p\n", func); \
+    func(__VA_ARGS__)
+
+/* AES-256 function prolog */
+#define CRYPT_PROLOG \
+    asm goto ("jmp %l0\n"  \
+        : /* no output */  \
+        : /* no input */   \
+        : /* no clobber */ \
+        : ___after_crypt_header); \
+    __asm__ __volatile__(  \
+        ".intel_syntax noprefix\n" \
+        ".byte 0xac,0xab,0x00,0x00,0x00,0x00\n\t" \
+        ".att_syntax\n" \
+    ); \
+    ___after_crypt_header:
+
+/* 16 byte pad for AES-256 encryption */
+#define CRYPT_EPILOG \
+    asm volatile( \
+        ".intel_syntax noprefix\n" \
+        "nop; nop; nop; nop; nop; nop; nop; nop\n\t" \
+        "nop; nop; nop; nop; nop; nop; nop; nop\n\t" \
+        ".att_syntax\n" \
+    )
+
+#define XOR128_KEYSIZ 4
+#define XOR256 KEYSIZ 8
+
+
+uint32_t xor32n_pcbc_crypt_buf(uint32_t* buf, uint32_t siz, const uint32_t* iv, const uint32_t* key, uint32_t ivkeysiz);
+
+unsigned char* xor32_byte_crypt(unsigned char* buf, uint32_t siz, uint32_t key);
+
+uint32_t xor32_randomkey(void);
+
+uint32_t murmurhash(const char *key, uint32_t len, uint32_t seed);
+
+#endif /* CRYPT_H_INCLUDED */