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| author | Tor Andersson <tor@ghostscript.com> | 2005-03-30 08:30:22 +0200 |
|---|---|---|
| committer | Tor Andersson <tor@ghostscript.com> | 2005-03-30 08:30:22 +0200 |
| commit | ee154f16bd09a43359967f7e7b86c3677c09461d (patch) | |
| tree | 08896cfa9ff55e05bfe7855965c620d45115d4d5 /stream/filt_arc4.c | |
| parent | 460ad7040d67a4a93a153f98095ff952a2b15d37 (diff) | |
| download | mupdf-ee154f16bd09a43359967f7e7b86c3677c09461d.tar.xz | |
rename part 1 -- files
Diffstat (limited to 'stream/filt_arc4.c')
| -rw-r--r-- | stream/filt_arc4.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/stream/filt_arc4.c b/stream/filt_arc4.c new file mode 100644 index 00000000..b025368c --- /dev/null +++ b/stream/filt_arc4.c @@ -0,0 +1,46 @@ +#include <fitz.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 nil; +} + +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; + } +} + |