updated for version 7.4.399v7.4.399

Problem:    Encryption implementation is messy.  Blowfish encryption has a
            weakness.
Solution:   Refactor the encryption, store the state in an allocated struct
            instead of using a save/restore mechanism.  Introduce the
            "blowfish2" method, which does not have the weakness and encrypts
            the whole undo file. (largely by David Leadbeater)

5 files changed, 33 insertions, 19 deletions

diff --git a/src/proto/blowfish.pro b/src/proto/blowfish.pro
index 4d64e10e8..66d029cd8 100644
--- a/src/proto/blowfish.pro
+++ b/src/proto/blowfish.pro
@@ -1,10 +1,6 @@
 /* blowfish.c */
-void bf_key_init __ARGS((char_u *password, char_u *salt, int salt_len));
-void bf_cfb_init __ARGS((char_u *iv, int iv_len));
-void bf_crypt_encode __ARGS((char_u *from, size_t len, char_u *to));
-void bf_crypt_decode __ARGS((char_u *ptr, long len));
-void bf_crypt_init_keys __ARGS((char_u *passwd));
-void bf_crypt_save __ARGS((void));
-void bf_crypt_restore __ARGS((void));
+void crypt_blowfish_encode __ARGS((cryptstate_T *state, char_u *from, size_t len, char_u *to));
+void crypt_blowfish_decode __ARGS((cryptstate_T *state, char_u *from, size_t len, char_u *to));
+void crypt_blowfish_init __ARGS((cryptstate_T *state, char_u *key, char_u *salt, int salt_len, char_u *seed, int seed_len));
 int blowfish_self_test __ARGS((void));
 /* vim: set ft=c : */
diff --git a/src/proto/crypt.pro b/src/proto/crypt.pro
new file mode 100644
index 000000000..d61df718b
--- /dev/null
+++ b/src/proto/crypt.pro
@@ -0,0 +1,24 @@
+/* crypt.c */
+int crypt_method_nr_from_name __ARGS((char_u *name));
+int crypt_method_nr_from_magic __ARGS((char *ptr, int len));
+int crypt_works_inplace __ARGS((cryptstate_T *state));
+int crypt_get_method_nr __ARGS((buf_T *buf));
+int crypt_whole_undofile __ARGS((int method_nr));
+int crypt_get_header_len __ARGS((int method_nr));
+void crypt_set_cm_option __ARGS((buf_T *buf, int method_nr));
+int crypt_self_test __ARGS((void));
+cryptstate_T *crypt_create __ARGS((int method_nr, char_u *key, char_u *salt, int salt_len, char_u *seed, int seed_len));
+cryptstate_T *crypt_create_from_header __ARGS((int method_nr, char_u *key, char_u *header));
+cryptstate_T *crypt_create_from_file __ARGS((FILE *fp, char_u *key));
+cryptstate_T *crypt_create_for_writing __ARGS((int method_nr, char_u *key, char_u **header, int *header_len));
+void crypt_free_state __ARGS((cryptstate_T *state));
+long crypt_encode_alloc __ARGS((cryptstate_T *state, char_u *from, size_t len, char_u **newptr));
+long crypt_decode_alloc __ARGS((cryptstate_T *state, char_u *ptr, long len, char_u **newptr));
+void crypt_encode __ARGS((cryptstate_T *state, char_u *from, size_t len, char_u *to));
+void crypt_decode __ARGS((cryptstate_T *state, char_u *from, size_t len, char_u *to));
+void crypt_encode_inplace __ARGS((cryptstate_T *state, char_u *buf, size_t len));
+void crypt_decode_inplace __ARGS((cryptstate_T *state, char_u *buf, size_t len));
+void crypt_free_key __ARGS((char_u *key));
+char_u *crypt_get_key __ARGS((int store, int twice));
+void crypt_append_msg __ARGS((buf_T *buf));
+/* vim: set ft=c : */
diff --git a/src/proto/crypt_zip.pro b/src/proto/crypt_zip.pro
new file mode 100644
index 000000000..5f4e13771
--- /dev/null
+++ b/src/proto/crypt_zip.pro
@@ -0,0 +1,5 @@
+/* crypt_zip.c */
+void crypt_zip_init __ARGS((cryptstate_T *state, char_u *key, char_u *salt, int salt_len, char_u *seed, int seed_len));
+void crypt_zip_encode __ARGS((cryptstate_T *state, char_u *from, size_t len, char_u *to));
+void crypt_zip_decode __ARGS((cryptstate_T *state, char_u *from, size_t len, char_u *to));
+/* vim: set ft=c : */
diff --git a/src/proto/fileio.pro b/src/proto/fileio.pro
index 7aa99cfa8..0d532f4ce 100644
--- a/src/proto/fileio.pro
+++ b/src/proto/fileio.pro
@@ -4,8 +4,6 @@ int readfile __ARGS((char_u *fname, char_u *sfname, linenr_T from, linenr_T line
 int prep_exarg __ARGS((exarg_T *eap, buf_T *buf));
 void set_file_options __ARGS((int set_options, exarg_T *eap));
 void set_forced_fenc __ARGS((exarg_T *eap));
-int prepare_crypt_read __ARGS((FILE *fp));
-char_u *prepare_crypt_write __ARGS((buf_T *buf, int *lenp));
 int check_file_readonly __ARGS((char_u *fname, int perm));
 int buf_write __ARGS((buf_T *buf, char_u *fname, char_u *sfname, linenr_T start, linenr_T end, exarg_T *eap, int append, int forceit, int reset_changed, int filtering));
 void msg_add_fname __ARGS((buf_T *buf, char_u *fname));
diff --git a/src/proto/misc2.pro b/src/proto/misc2.pro
index 4fd457382..b2f72d864 100644
--- a/src/proto/misc2.pro
+++ b/src/proto/misc2.pro
@@ -84,16 +84,6 @@ int illegal_slash __ARGS((char *name));
 char_u *parse_shape_opt __ARGS((int what));
 int get_shape_idx __ARGS((int mouse));
 void update_mouseshape __ARGS((int shape_idx));
-int crypt_method_from_string __ARGS((char_u *s));
-int get_crypt_method __ARGS((buf_T *buf));
-void set_crypt_method __ARGS((buf_T *buf, int method));
-void crypt_push_state __ARGS((void));
-void crypt_pop_state __ARGS((void));
-void crypt_encode __ARGS((char_u *from, size_t len, char_u *to));
-void crypt_decode __ARGS((char_u *ptr, long len));
-void crypt_init_keys __ARGS((char_u *passwd));
-void free_crypt_key __ARGS((char_u *key));
-char_u *get_crypt_key __ARGS((int store, int twice));
 void *vim_findfile_init __ARGS((char_u *path, char_u *filename, char_u *stopdirs, int level, int free_visited, int find_what, void *search_ctx_arg, int tagfile, char_u *rel_fname));
 char_u *vim_findfile_stopdir __ARGS((char_u *buf));
 void vim_findfile_cleanup __ARGS((void *ctx));
@@ -116,5 +106,6 @@ time_t get8ctime __ARGS((FILE *fd));
 char_u *read_string __ARGS((FILE *fd, int cnt));
 int put_bytes __ARGS((FILE *fd, long_u nr, int len));
 void put_time __ARGS((FILE *fd, time_t the_time));
+void time_to_bytes __ARGS((time_t the_time, char_u *buf));
 int has_non_ascii __ARGS((char_u *s));
 /* vim: set ft=c : */