crypt: Move implementation-independent code to separate file.

[paraslash.git] / crypt.h

diff --git a/crypt.h b/crypt.h
index 21abe41f68cd8c5b335cc133b5c6f3050869c4ee..d2c2b32024ccdaa1d35af2b7b3813976040f61e7 100644 (file)
--- a/crypt.h
+++ b/crypt.h
@@ -4,7 +4,16 @@
  * Licensed under the GPL v2. For licencing details see COPYING.
  */
 
-/** \file crypt.h Prototypes for paraslash crypto functions. */
+/** \file crypt.h Public crypto interface. */
+
+
+/** \cond used to distinguish between loading of private/public key */
+#define LOAD_PUBLIC_KEY 0
+#define LOAD_PRIVATE_KEY 1
+#define CHALLENGE_SIZE 64
+/** \endcond **/
+
+/* asymetric (public key) crypto */
 
 /** Opaque structure for public and private keys. */
 struct asymmetric_key;
@@ -17,17 +26,18 @@ int get_asymmetric_key(const char *key_file, int private,
                struct asymmetric_key **result);
 void free_asymmetric_key(struct asymmetric_key *key);
 
+/* random numbers */
 void get_random_bytes_or_die(unsigned char *buf, int num);
 void init_random_seed_or_die(void);
 
-/** Opaque structure for stream cipher crypto. */
-struct stream_cipher;
+/* stream cipher declarations and prototypes */
 
-/** Number of bytes of the session key. */
+/** Opaque structure for stream ciphers. */
+struct stream_cipher;
+/** Number of bytes of the session key for stream ciphers. */
 #define SESSION_KEY_LEN 32
-
 /**
- * Used on the server-side for client-server communication encryption.
+ * Used for client-server communication encryption.
  *
  * The traffic between (the forked child of) para_server and the remote client
  * process is crypted by a symmetric session key. This structure contains the
@@ -42,10 +52,8 @@ struct stream_cipher_context {
        /** Key used for sending data. */
        struct stream_cipher *send;
 };
-
 struct stream_cipher *sc_new(const unsigned char *data, int len);
 void sc_free(struct stream_cipher *sc);
-
 int sc_send_bin_buffer(struct stream_cipher_context *scc, const char *buf,
                size_t len);
 int sc_send_buffer(struct stream_cipher_context *scc, const char *buf);
@@ -55,57 +63,11 @@ int sc_recv_bin_buffer(struct stream_cipher_context *scc, char *buf,
                size_t size);
 int sc_recv_buffer(struct stream_cipher_context *scc, char *buf, size_t size);
 
-/** \cond used to distinguish between loading of private/public key */
-#define LOAD_PUBLIC_KEY 0
-#define LOAD_PRIVATE_KEY 1
-#define CHALLENGE_SIZE 64
-/** \endcond **/
+/* hashing */
 
 /** Size of the hash value in bytes. */
 #define HASH_SIZE 20
 
 void hash_function(const char *data, unsigned long len, unsigned char *hash);
-
-/**
- * Compare two hashes.
- *
- * \param h1 Pointer to the first hash value.
- * \param h2 Pointer to the second hash value.
- *
- * \return 1, -1, or zero, depending on whether \a h1 is greater than,
- * less than or equal to h2, respectively.
- */
-_static_inline_ int hash_compare(unsigned char *h1, unsigned char *h2)
-{
-       int i;
-
-       for (i = 0; i < HASH_SIZE; i++) {
-               if (h1[i] < h2[i])
-                       return -1;
-               if (h1[i] > h2[i])
-                       return 1;
-       }
-       return 0;
-}
-
-/**
- * Convert a hash value to ascii format.
- *
- * \param hash the hash value.
- * \param asc Result pointer.
- *
- * \a asc must point to an area of at least 2 * \p HASH_SIZE + 1 bytes which
- * will be filled by the function with the ascii representation of the hash
- * value given by \a hash, and a terminating \p NULL byte.
- */
-_static_inline_ void hash_to_asc(unsigned char *hash, char *asc)
-{
-       int i;
-       const char hexchar[] = "0123456789abcdef";
-
-       for (i = 0; i < HASH_SIZE; i++) {
-               asc[2 * i] = hexchar[hash[i] >> 4];
-               asc[2 * i + 1] = hexchar[hash[i] & 0xf];
-       }
-       asc[2 * HASH_SIZE] = '\0';
-}
+void hash_to_asc(unsigned char *hash, char *asc);
+int hash_compare(unsigned char *h1, unsigned char *h2);