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authorTor Andersson <tor@ghostscript.com>2009-02-28 13:00:34 +0100
committerTor Andersson <tor@ghostscript.com>2009-02-28 13:00:34 +0100
commitf744dace3f0f91b8505979bf244453c9ec713b4b (patch)
tree86fed467944886a17d4d22038990a8fd8d2e3be8 /fitz/filt_arc4.c
parentd0631f32c95f656d30c90d28c15a56b09fcc86ee (diff)
downloadmupdf-f744dace3f0f91b8505979bf244453c9ec713b4b.tar.xz
Moved Fitz files into one directory.
Diffstat (limited to 'fitz/filt_arc4.c')
-rw-r--r--fitz/filt_arc4.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/fitz/filt_arc4.c b/fitz/filt_arc4.c
new file mode 100644
index 00000000..af038599
--- /dev/null
+++ b/fitz/filt_arc4.c
@@ -0,0 +1,47 @@
+#include "fitz-base.h"
+#include "fitz-stream.h"
+
+typedef struct fz_arc4c_s fz_arc4c;
+
+struct fz_arc4c_s
+{
+ fz_filter super;
+ fz_arc4 arc4;
+};
+
+fz_error *
+fz_newarc4filter(fz_filter **fp, unsigned char *key, unsigned keylen)
+{
+ FZ_NEWFILTER(fz_arc4c, f, arc4filter);
+ fz_arc4init(&f->arc4, key, keylen);
+ return fz_okay;
+}
+
+void
+fz_droparc4filter(fz_filter *f)
+{
+}
+
+fz_error *
+fz_processarc4filter(fz_filter *filter, fz_buffer *in, fz_buffer *out)
+{
+ fz_arc4c *f = (fz_arc4c*)filter;
+ int n;
+
+ while (1)
+ {
+ if (in->rp + 1 > in->wp) {
+ if (in->eof)
+ return fz_iodone;
+ return fz_ioneedin;
+ }
+ if (out->wp + 1 > out->ep)
+ return fz_ioneedout;
+
+ n = MIN(in->wp - in->rp, out->ep - out->wp);
+ fz_arc4encrypt(&f->arc4, out->wp, in->rp, n);
+ in->rp += n;
+ out->wp += n;
+ }
+}
+