more shuffling

1 files changed, 39 insertions, 0 deletions

diff --git a/include/fitz/stm_crypt.h b/include/fitz/stm_crypt.h
new file mode 100644
index 00000000..15191caa
--- /dev/null
+++ b/include/fitz/stm_crypt.h
@@ -0,0 +1,39 @@
+/*
+ * Basic crypto functions.
+ * Independent of the rest of fitz.
+ * For further encapsulation in filters, or not.
+ */
+
+/* md5 digests */
+
+typedef struct fz_md5_s fz_md5;
+
+struct fz_md5_s
+{
+	unsigned long state[4];
+	unsigned long count[2];
+	unsigned char buffer[64];
+};
+
+void fz_md5init(fz_md5 *state);
+void fz_md5update(fz_md5 *state, unsigned char *input, unsigned inlen);
+void fz_md5final(fz_md5 *state, unsigned char digest[16]);
+
+/* arc4 crypto */
+
+typedef struct fz_arc4_s fz_arc4;
+
+struct fz_arc4_s
+{
+	unsigned x;
+	unsigned y;
+	unsigned char state[256];
+};
+
+void fz_arc4init(fz_arc4 *state, unsigned char *key, unsigned len);
+unsigned char fz_arc4next(fz_arc4 *state);
+void fz_arc4encrypt(fz_arc4 *state, unsigned char *dest, unsigned char *src, unsigned len);
+
+/* TODO: sha1 */
+/* TODO: aes */
+