Sync from Upstream

armsrc/hitag2_crypto.h

@@ -0,0 +1,36 @@
+#ifndef __HITAG2_CRYPTO_H
+#define __HITAG2_CRYPTO_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "string.h"
+#include "util.h"
+
+struct hitag2_tag {
+    uint32_t uid;
+    enum {
+        TAG_STATE_RESET      = 0x01,       // Just powered up, awaiting GetSnr
+        TAG_STATE_ACTIVATING = 0x02,       // In activation phase (password mode), sent UID, awaiting reader password
+        TAG_STATE_ACTIVATED  = 0x03,       // Activation complete, awaiting read/write commands
+        TAG_STATE_WRITING    = 0x04,       // In write command, awaiting sector contents to be written
+    } state;
+    uint16_t active_sector;
+    uint8_t crypto_active;
+    uint64_t cs;
+    uint8_t sectors[12][4];
+};
+
+extern uint32_t _f20(const uint64_t x);
+extern uint64_t _hitag2_init(const uint64_t key, const uint32_t serial, const uint32_t IV);
+extern uint64_t _hitag2_round(uint64_t *state);
+extern uint32_t _hitag2_byte(uint64_t *x);
+extern void hitag2_cipher_reset(struct hitag2_tag *tag, const uint8_t *iv);
+extern int hitag2_cipher_authenticate(uint64_t *cs, const uint8_t *authenticator_is);
+extern int hitag2_cipher_transcrypt(uint64_t *cs, uint8_t *data, uint16_t bytes, uint16_t bits) ;
+#ifdef __cplusplus
+}
+#endif
+
+#endif