1 files changed, 57 insertions, 0 deletions
diff --git a/src/lib/crypt_ops/crypto_cipher.h b/src/lib/crypt_ops/crypto_cipher.h
new file mode 100644
index 0000000000..f9444d03fc
--- /dev/null
+++ b/src/lib/crypt_ops/crypto_cipher.h
@@ -0,0 +1,57 @@
+/* Copyright (c) 2001, Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * \file crypto_cipher.h
+ *
+ * \brief Headers for crypto_cipher.c
+ **/
+
+#ifndef TOR_CRYPTO_CIPHER_H
+#define TOR_CRYPTO_CIPHER_H
+
+#include "orconfig.h"
+
+#include <stdio.h>
+#include "lib/cc/torint.h"
+
+/** Length of our symmetric cipher's keys of 128-bit. */
+#define CIPHER_KEY_LEN 16
+/** Length of our symmetric cipher's IV of 128-bit. */
+#define CIPHER_IV_LEN 16
+/** Length of our symmetric cipher's keys of 256-bit. */
+#define CIPHER256_KEY_LEN 32
+
+typedef struct aes_cnt_cipher crypto_cipher_t;
+
+/* environment setup */
+crypto_cipher_t *crypto_cipher_new(const char *key);
+crypto_cipher_t *crypto_cipher_new_with_bits(const char *key, int bits);
+crypto_cipher_t *crypto_cipher_new_with_iv(const char *key, const char *iv);
+crypto_cipher_t *crypto_cipher_new_with_iv_and_bits(const uint8_t *key,
+                                                    const uint8_t *iv,
+                                                    int bits);
+void crypto_cipher_free_(crypto_cipher_t *env);
+#define crypto_cipher_free(c) \
+  FREE_AND_NULL(crypto_cipher_t, crypto_cipher_free_, (c))
+
+/* symmetric crypto */
+const char *crypto_cipher_get_key(crypto_cipher_t *env);
+
+int crypto_cipher_encrypt(crypto_cipher_t *env, char *to,
+                          const char *from, size_t fromlen);
+int crypto_cipher_decrypt(crypto_cipher_t *env, char *to,
+                          const char *from, size_t fromlen);
+void crypto_cipher_crypt_inplace(crypto_cipher_t *env, char *d, size_t len);
+
+int crypto_cipher_encrypt_with_iv(const char *key,
+                                  char *to, size_t tolen,
+                                  const char *from, size_t fromlen);
+int crypto_cipher_decrypt_with_iv(const char *key,
+                                  char *to, size_t tolen,
+                                  const char *from, size_t fromlen);
+
+#endif /* !defined(TOR_CRYPTO_H) */