X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=blobdiff_plain;f=crypt.h;h=3e5a8d313b5ffd10273c27717c135e150f1c6d04;hp=4b17b4c05d7e200ef6767a2d3bbb60f561b10425;hb=ab98d5b8b03e0e2fdcf010fc8f6a6b0ab8f87564;hpb=abfb661f35e99e99c09a94d84839356d905af080

diff --git a/crypt.h b/crypt.h
index 4b17b4c0..3e5a8d31 100644
--- a/crypt.h
+++ b/crypt.h
@@ -1,20 +1,15 @@
-/*
- * Copyright (C) 2005-2014 Andre Noll <maan@tuebingen.mpg.de>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2005 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
 
 /** \file crypt.h Public crypto interface. */
 
+/*
+ * Asymmetric pubkey cryptosystem (apc).
+ *
+ * This is just RSA, but this fact is a hidden implementation detail.
+ */
 
-/* These are used to distinguish between loading of private/public key. */
-
-/** The key to load is a public key. */
-#define LOAD_PUBLIC_KEY 0
-/** The key to load is a private key. */
-#define LOAD_PRIVATE_KEY 1
 /** The size of the challenge sent to the client. */
-#define CHALLENGE_SIZE 64
+#define APC_CHALLENGE_SIZE 64
 
 /** Opaque structure for public and private keys. */
 struct asymmetric_key;
@@ -29,7 +24,7 @@ struct asymmetric_key;
  *
  * \return The size of the encrypted data on success, negative on errors.
  */
-int pub_encrypt(struct asymmetric_key *pub, unsigned char *inbuf,
+int apc_pub_encrypt(struct asymmetric_key *pub, unsigned char *inbuf,
 		unsigned len, unsigned char *outbuf);
 
 /**
@@ -44,29 +39,28 @@ int pub_encrypt(struct asymmetric_key *pub, unsigned char *inbuf,
  *
  * \return The size of the recovered plaintext on success, negative on errors.
  */
-int priv_decrypt(const char *key_file, unsigned char *outbuf,
+int apc_priv_decrypt(const char *key_file, unsigned char *outbuf,
 		unsigned char *inbuf, int inlen);
 
 /**
  * Read an asymmetric key from a file.
  *
  * \param key_file The file containing the key.
- * \param private if non-zero, read the private key, otherwise the public key.
  * \param result The key structure is returned here.
  *
  * \return The size of the key on success, negative on errors.
  */
-int get_asymmetric_key(const char *key_file, int private,
-		struct asymmetric_key **result);
+int apc_get_pubkey(const char *key_file, struct asymmetric_key **result);
 
 /**
- * Deallocate an asymmetric key structure.
+ * Deallocate a public key.
  *
  * \param key Pointer to the key structure to free.
  *
- * This must be called for any key obtained by get_asymmetric_key().
+ * This should be called for keys obtained by \ref apc_get_pubkey() if the key is no
+ * longer needed.
  */
-void free_asymmetric_key(struct asymmetric_key *key);
+void apc_free_pubkey(struct asymmetric_key *key);
 
 
 /**
@@ -119,16 +113,14 @@ struct stream_cipher_context {
 };
 
 /**
- * Allocate and initialize a stream cipher structure.
+ * Allocate and initialize an aes_ctr128 stream cipher structure.
  *
  * \param data The key.
  * \param len The size of the key.
- * \param use_aes True: Use the aes_ctr128 stream cipher, false: Use RC4.
  *
  * \return A new stream cipher structure.
  */
-struct stream_cipher *sc_new(const unsigned char *data, int len,
-		bool use_aes);
+struct stream_cipher *sc_new(const unsigned char *data, int len);
 
 /**
  * Encrypt or decrypt a buffer using a stream cipher.