Gecko [ nrupathungauniversityblr.ac.in ]

Name	Size	Permission
.deps	[ DIR ]	drwxrwxr-x
.libs	[ DIR ]	drwxrwxr-x
.dirstamp	0 B	-rw-rw-r--
ImageMagick-7.Q16HDRI.pc	867 B	-rw-rw-r--
ImageMagick.pc	867 B	-rw-rw-r--
ImageMagick.pc.in	575 B	-rw-rw-r--
MagickCore-7.Q16HDRI.pc	916 B	-rw-rw-r--
MagickCore-config	1.5 KB	-rwxrwxr-x
MagickCore-config.1	1.85 KB	-rw-rw-r--
MagickCore-config.in	1.57 KB	-rw-rw-r--
MagickCore.h	4.94 KB	-rw-rw-r--
MagickCore.pc	916 B	-rw-rw-r--
MagickCore.pc.in	688 B	-rw-rw-r--
Makefile.am	14.76 KB	-rw-rw-r--
accelerate-kernels-private.h	102.16 KB	-rw-rw-r--
accelerate-private.h	2.63 KB	-rw-rw-r--
accelerate.c	169.72 KB	-rw-rw-r--
animate-private.h	1.23 KB	-rw-rw-r--
animate.c	103.29 KB	-rw-rw-r--
animate.h	979 B	-rw-rw-r--
annotate-private.h	1022 B	-rw-rw-r--
annotate.c	71.69 KB	-rw-rw-r--
annotate.h	1.26 KB	-rw-rw-r--
artifact.c	18.74 KB	-rw-rw-r--
artifact.h	1.35 KB	-rw-rw-r--
attribute.c	69.33 KB	-rw-rw-r--
attribute.h	1.78 KB	-rw-rw-r--
blob-private.h	4.07 KB	-rw-rw-r--
blob.c	207.68 KB	-rw-rw-r--
blob.h	3.29 KB	-rw-rw-r--
cache-private.h	6.63 KB	-rw-rw-r--
cache-view.c	44.83 KB	-rw-rw-r--
cache-view.h	3.63 KB	-rw-rw-r--
cache.c	211.11 KB	-rw-rw-r--
cache.h	2.5 KB	-rw-rw-r--
channel.c	41.69 KB	-rw-rw-r--
channel.h	1.28 KB	-rw-rw-r--
cipher.c	40.58 KB	-rw-rw-r--
cipher.h	1.11 KB	-rw-rw-r--
client.c	7.37 KB	-rw-rw-r--
client.h	1.03 KB	-rw-rw-r--
coder-private.h	1005 B	-rw-rw-r--
coder.c	20.03 KB	-rw-rw-r--
coder.h	1.28 KB	-rw-rw-r--
color-private.h	2.28 KB	-rw-rw-r--
color.c	105.5 KB	-rw-rw-r--
color.h	2.22 KB	-rw-rw-r--
colormap-private.h	1.8 KB	-rw-rw-r--
colormap.c	13.3 KB	-rw-rw-r--
colormap.h	1.05 KB	-rw-rw-r--
colorspace-private.h	4.23 KB	-rw-rw-r--
colorspace.c	99.03 KB	-rw-rw-r--
colorspace.h	2.35 KB	-rw-rw-r--
compare.c	72.32 KB	-rw-rw-r--
compare.h	1.86 KB	-rw-rw-r--
composite-private.h	5.5 KB	-rw-rw-r--
composite.c	81.18 KB	-rw-rw-r--
composite.h	2.85 KB	-rw-rw-r--
compress.c	39.93 KB	-rw-rw-r--
compress.h	2.15 KB	-rw-rw-r--
configure-private.h	1019 B	-rw-rw-r--
configure.c	44.68 KB	-rw-rw-r--
configure.h	1.65 KB	-rw-rw-r--
constitute-private.h	890 B	-rw-rw-r--
constitute.c	50.54 KB	-rw-rw-r--
constitute.h	1.45 KB	-rw-rw-r--
decorate.c	31.1 KB	-rw-rw-r--
decorate.h	1.34 KB	-rw-rw-r--
delegate-private.h	2.16 KB	-rw-rw-r--
delegate.c	83.77 KB	-rw-rw-r--
delegate.h	1.98 KB	-rw-rw-r--
deprecate.c	13.45 KB	-rw-rw-r--
deprecate.h	1.21 KB	-rw-rw-r--
display-private.h	1.24 KB	-rw-rw-r--
display.c	515.56 KB	-rw-rw-r--
display.h	1.05 KB	-rw-rw-r--
distort.c	134.29 KB	-rw-rw-r--
distort.h	2.65 KB	-rw-rw-r--
distribute-cache-private.h	2.24 KB	-rw-rw-r--
distribute-cache.c	49.1 KB	-rw-rw-r--
distribute-cache.h	997 B	-rw-rw-r--
draw-private.h	2.1 KB	-rw-rw-r--
draw.c	245.29 KB	-rw-rw-r--
draw.h	5.55 KB	-rw-rw-r--
effect.c	125.86 KB	-rw-rw-r--
effect.h	2.85 KB	-rw-rw-r--
enhance.c	137.51 KB	-rw-rw-r--
enhance.h	2.32 KB	-rw-rw-r--
exception-private.h	3.18 KB	-rw-rw-r--
exception.c	44.49 KB	-rw-rw-r--
exception.h	4.35 KB	-rw-rw-r--
feature.c	83.79 KB	-rw-rw-r--
feature.h	1.7 KB	-rw-rw-r--
fourier.c	49.36 KB	-rw-rw-r--
fourier.h	1.38 KB	-rw-rw-r--
fx-private.h	1.21 KB	-rw-rw-r--
fx.c	87.87 KB	-rw-rw-r--
fx.h	956 B	-rw-rw-r--
gem-private.h	6.28 KB	-rw-rw-r--
gem.c	53.31 KB	-rw-rw-r--
gem.h	1.15 KB	-rw-rw-r--
geometry.c	55.44 KB	-rw-rw-r--
geometry.h	3.98 KB	-rw-rw-r--
histogram.c	39.72 KB	-rw-rw-r--
histogram.h	1.35 KB	-rw-rw-r--
identify.c	57.07 KB	-rw-rw-r--
identify.h	971 B	-rw-rw-r--
image-private.h	2.89 KB	-rw-rw-r--
image-view.c	42.98 KB	-rw-rw-r--
image-view.h	2.72 KB	-rw-rw-r--
image.c	142.86 KB	-rw-rw-r--
image.h	13.87 KB	-rw-rw-r--
layer.c	75.49 KB	-rw-rw-r--
layer.h	2 KB	-rw-rw-r--
libMagickCore-7.Q16HDRI.la	1.32 KB	-rw-rw-r--
libMagickCore.map	46 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-acc...	374 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-acc...	6.25 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ani...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ani...	245.7 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ann...	368 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ann...	225.34 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-art...	368 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-art...	57.34 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-att...	371 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-att...	198.58 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-blo...	356 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-blo...	559.89 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-cac...	374 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-cac...	130.77 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-cac...	359 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-cac...	575.03 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-cha...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-cha...	132.27 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-cip...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-cip...	99.63 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-cli...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-cli...	11.99 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-cod...	359 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-cod...	48.66 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-col...	359 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-col...	187.05 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-col...	368 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-col...	64.29 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-col...	374 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-col...	416.23 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-com...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-com...	244.2 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-com...	371 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-com...	205.62 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-com...	368 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-com...	116.91 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-con...	371 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-con...	92.49 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-con...	374 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-con...	134.21 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-dec...	368 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-dec...	140.39 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-del...	368 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-del...	181.88 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-dep...	371 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-dep...	40.1 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-dis...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-dis...	1001.06 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-dis...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-dis...	257.94 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-dis...	392 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-dis...	138.98 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-dra...	356 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-dra...	629.21 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-eff...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-eff...	359.09 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-enh...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-enh...	435.72 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-exc...	371 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-exc...	79.98 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-fea...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-fea...	231.75 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-fou...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-fou...	147.25 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-fx....	350 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-fx....	285.02 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-gem...	353 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-gem...	222.46 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-geo...	368 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-geo...	111.41 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-his...	371 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-his...	103.51 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ide...	368 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ide...	183.14 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ima...	374 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ima...	103.35 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ima...	359 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ima...	311.29 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-lay...	359 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-lay...	140.62 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-lin...	377 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-lin...	41.23 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-lis...	356 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-lis...	137.44 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-loc...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-loc...	93.1 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-log...	353 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-log...	109.05 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mag...	359 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mag...	54.52 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mag...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mag...	123.44 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mat...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mat...	90.06 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mem...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mem...	64.4 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mim...	356 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mim...	69.73 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mod...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mod...	46.27 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mon...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mon...	37.7 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mon...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mon...	102.55 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mor...	374 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-mor...	249.84 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ope...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ope...	14.32 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-opt...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-opt...	238.09 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-pai...	359 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-pai...	158.05 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-pix...	359 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-pix...	1.12 MB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-pol...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-pol...	84.46 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-pre...	368 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-pre...	50.55 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-pro...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-pro...	178.05 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-pro...	368 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-pro...	375.58 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-qua...	368 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-qua...	308.11 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-qua...	386 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-qua...	886.72 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-qua...	386 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-qua...	690.47 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-qua...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-qua...	93.22 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ran...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ran...	71.95 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-reg...	368 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-reg...	58.8 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-res...	368 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-res...	101.68 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-res...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-res...	484.14 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-res...	368 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-res...	130.89 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-seg...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-seg...	137.09 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-sem...	371 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-sem...	27.5 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-she...	359 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-she...	209.97 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-sig...	371 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-sig...	77.59 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-spl...	374 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-spl...	71.54 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-sta...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-sta...	42.69 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-sta...	371 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-sta...	361.96 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-str...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-str...	389.89 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-str...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-str...	145.78 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-thr...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-thr...	9.66 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-thr...	371 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-thr...	223.15 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-tim...	359 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-tim...	38.76 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-tok...	359 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-tok...	220.66 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-tra...	371 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-tra...	228.2 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-typ...	356 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-typ...	88.52 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-uti...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-uti...	121.42 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ver...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-ver...	27.84 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-vis...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-vis...	161.29 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-vis...	386 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-vis...	490.88 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-wid...	362 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-wid...	450.54 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-xml...	368 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-xml...	166.75 KB	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-xwi...	365 B	-rw-rw-r--
libMagickCore_7_Q16HDRI_la-xwi...	641.91 KB	-rw-rw-r--
linked-list.c	33.55 KB	-rw-rw-r--
linked-list.h	1.92 KB	-rw-rw-r--
list.c	52.79 KB	-rw-rw-r--
list.h	2.3 KB	-rw-rw-r--
locale-private.h	1.35 KB	-rw-rw-r--
locale.c	58.89 KB	-rw-rw-r--
locale_.h	2.2 KB	-rw-rw-r--
log-private.h	1 KB	-rw-rw-r--
log.c	56.53 KB	-rw-rw-r--
log.h	2.73 KB	-rw-rw-r--
magic-private.h	999 B	-rw-rw-r--
magic.c	27.52 KB	-rw-rw-r--
magic.h	1.32 KB	-rw-rw-r--
magick-baseconfig.h	44.5 KB	-rw-rw-r--
magick-config.h	8.75 KB	-rw-rw-r--
magick-private.h	1.04 KB	-rw-rw-r--
magick-type.h	5.78 KB	-rw-rw-r--
magick.c	66.91 KB	-rw-rw-r--
magick.h	4.18 KB	-rw-rw-r--
matrix-private.h	1.1 KB	-rw-rw-r--
matrix.c	38.14 KB	-rw-rw-r--
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Code Editor : signature.c

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%        SSSSS  IIIII   GGGG  N   N   AAA   TTTTT  U   U  RRRR   EEEEE        %
%        SS       I    G      NN  N  A   A    T    U   U  R   R  E            %
%         SSS     I    G  GG  N N N  AAAAA    T    U   U  RRRR   EEE          %
%           SS    I    G   G  N  NN  A   A    T    U   U  R R    E            %
%        SSSSS  IIIII   GGG   N   N  A   A    T     UUU   R  R   EEEEE        %
%                                                                             %
%                                                                             %
%         MagickCore Methods to Compute a Message Digest for an Image         %
%                                                                             %
%                             Software Design                                 %
%                                  Cristy                                     %
%                              December 1992                                  %
%                                                                             %
%                                                                             %
%  Copyright 1999-2020 ImageMagick Studio LLC, a non-profit organization      %
%  dedicated to making software imaging solutions freely available.           %
%                                                                             %
%  You may not use this file except in compliance with the License.  You may  %
%  obtain a copy of the License at                                            %
%                                                                             %
%    https://imagemagick.org/script/license.php                               %
%                                                                             %
%  Unless required by applicable law or agreed to in writing, software        %
%  distributed under the License is distributed on an "AS IS" BASIS,          %
%  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
%  See the License for the specific language governing permissions and        %
%  limitations under the License.                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
%
*/

/*
  Include declarations.
*/
#include "MagickCore/studio.h"
#include "MagickCore/cache.h"
#include "MagickCore/exception.h"
#include "MagickCore/exception-private.h"
#include "MagickCore/property.h"
#include "MagickCore/image.h"
#include "MagickCore/memory_.h"
#include "MagickCore/memory-private.h"
#include "MagickCore/pixel-accessor.h"
#include "MagickCore/quantum.h"
#include "MagickCore/quantum-private.h"
#include "MagickCore/signature.h"
#include "MagickCore/signature-private.h"
#include "MagickCore/string_.h"
#include "MagickCore/timer-private.h"
/*
  Define declarations.
*/
#define SignatureBlocksize  64
#define SignatureDigestsize  32

/*
  Typedef declarations.
*/
struct _SignatureInfo
{
  unsigned int
    digestsize,
    blocksize;

StringInfo
    *digest,
    *message;

unsigned int
    *accumulator,
    low_order,
    high_order;

size_t
    extent;

MagickBooleanType
    lsb_first;

ssize_t
    timestamp;

size_t
    signature;
};

/*
  Forward declarations.
*/
static void
  TransformSignature(SignatureInfo *);

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   A c q u i r e S i g n a t u r e I n f o                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  AcquireSignatureInfo() allocate the SignatureInfo structure.
%
%  The format of the AcquireSignatureInfo method is:
%
%      SignatureInfo *AcquireSignatureInfo(void)
%
*/
MagickPrivate SignatureInfo *AcquireSignatureInfo(void)
{
  SignatureInfo
    *signature_info;

unsigned long
    lsb_first;

signature_info=(SignatureInfo *) AcquireCriticalMemory(
    sizeof(*signature_info));
  (void) memset(signature_info,0,sizeof(*signature_info));
  signature_info->digestsize=SignatureDigestsize;
  signature_info->blocksize=SignatureBlocksize;
  signature_info->digest=AcquireStringInfo(SignatureDigestsize);
  signature_info->message=AcquireStringInfo(SignatureBlocksize);
  signature_info->accumulator=(unsigned int *) AcquireQuantumMemory(
    SignatureBlocksize,sizeof(*signature_info->accumulator));
  if (signature_info->accumulator == (unsigned int *) NULL)
    ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
  (void) memset(signature_info->accumulator,0,SignatureBlocksize*
    sizeof(*signature_info->accumulator));
  lsb_first=1;
  signature_info->lsb_first=(int) (*(char *) &lsb_first) == 1 ? MagickTrue :
    MagickFalse;
  signature_info->timestamp=(ssize_t) GetMagickTime();
  signature_info->signature=MagickCoreSignature;
  InitializeSignature(signature_info);
  return(signature_info);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   D e s t r o y S i g n a t u r e I n f o                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  DestroySignatureInfo() zeros memory associated with the SignatureInfo
%  structure.
%
%  The format of the DestroySignatureInfo method is:
%
%      SignatureInfo *DestroySignatureInfo(SignatureInfo *signature_info)
%
%  A description of each parameter follows:
%
%    o signature_info: the cipher signature_info.
%
*/
MagickPrivate SignatureInfo *DestroySignatureInfo(SignatureInfo *signature_info)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(signature_info != (SignatureInfo *) NULL);
  assert(signature_info->signature == MagickCoreSignature);
  if (signature_info->accumulator != (unsigned int *) NULL)
    signature_info->accumulator=(unsigned int *) RelinquishMagickMemory(
      signature_info->accumulator);
  if (signature_info->message != (StringInfo *) NULL)
    signature_info->message=DestroyStringInfo(signature_info->message);
  if (signature_info->digest != (StringInfo *) NULL)
    signature_info->digest=DestroyStringInfo(signature_info->digest);
  signature_info->signature=(~MagickCoreSignature);
  signature_info=(SignatureInfo *) RelinquishMagickMemory(signature_info);
  return(signature_info);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   F i n a l i z e S i g n a t u r e                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  FinalizeSignature() finalizes the Signature message accumulator computation.
%
%  The format of the FinalizeSignature method is:
%
%      FinalizeSignature(SignatureInfo *signature_info)
%
%  A description of each parameter follows:
%
%    o signature_info: the address of a structure of type SignatureInfo.
%
*/
MagickPrivate void FinalizeSignature(SignatureInfo *signature_info)
{
  register ssize_t
    i;

size_t
    extent;

unsigned char
    *datum;

unsigned int
    high_order,
    low_order;

/*
    Add padding and return the message accumulator.
  */
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(signature_info != (SignatureInfo *) NULL);
  assert(signature_info->signature == MagickCoreSignature);
  low_order=signature_info->low_order;
  high_order=signature_info->high_order;
  extent=((low_order >> 3) & 0x3f);
  datum=GetStringInfoDatum(signature_info->message);
  datum[extent++]=(unsigned char) 0x80;
  if (extent <= (unsigned int) (GetStringInfoLength(signature_info->message)-8))
    (void) memset(datum+extent,0,GetStringInfoLength(
      signature_info->message)-8-extent);
  else
    {
      (void) memset(datum+extent,0,GetStringInfoLength(
        signature_info->message)-extent);
      TransformSignature(signature_info);
      (void) memset(datum,0,GetStringInfoLength(
        signature_info->message)-8);
    }
  datum[56]=(unsigned char) (high_order >> 24);
  datum[57]=(unsigned char) (high_order >> 16);
  datum[58]=(unsigned char) (high_order >> 8);
  datum[59]=(unsigned char) high_order;
  datum[60]=(unsigned char) (low_order >> 24);
  datum[61]=(unsigned char) (low_order >> 16);
  datum[62]=(unsigned char) (low_order >> 8);
  datum[63]=(unsigned char) low_order;
  TransformSignature(signature_info);
  p=signature_info->accumulator;
  q=GetStringInfoDatum(signature_info->digest);
  for (i=0; i < (SignatureDigestsize/4); i++)
  {
    *q++=(unsigned char) ((*p >> 24) & 0xff);
    *q++=(unsigned char) ((*p >> 16) & 0xff);
    *q++=(unsigned char) ((*p >> 8) & 0xff);
    *q++=(unsigned char) (*p & 0xff);
    p++;
  }
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t S i g n a t u r e B l o c k s i z e                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetSignatureBlocksize() returns the Signature blocksize.
%
%  The format of the GetSignatureBlocksize method is:
%
%      unsigned int *GetSignatureBlocksize(const SignatureInfo *signature_info)
%
%  A description of each parameter follows:
%
%    o signature_info: the signature info.
%
*/
MagickPrivate unsigned int GetSignatureBlocksize(
  const SignatureInfo *signature_info)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(signature_info != (SignatureInfo *) NULL);
  assert(signature_info->signature == MagickCoreSignature);
  return(signature_info->blocksize);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t S i g n a t u r e D i g e s t                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetSignatureDigest() returns the signature digest.
%
%  The format of the GetSignatureDigest method is:
%
%      const StringInfo *GetSignatureDigest(const SignatureInfo *signature_info)
%
%  A description of each parameter follows:
%
%    o signature_info: the signature info.
%
*/
MagickPrivate const StringInfo *GetSignatureDigest(
  const SignatureInfo *signature_info)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(signature_info != (SignatureInfo *) NULL);
  assert(signature_info->signature == MagickCoreSignature);
  return(signature_info->digest);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t S i g n a t u r e D i g e s t s i z e                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetSignatureDigestsize() returns the Signature digest size.
%
%  The format of the GetSignatureDigestsize method is:
%
%      unsigned int *GetSignatureDigestsize(const SignatureInfo *signature_info)
%
%  A description of each parameter follows:
%
%    o signature_info: the signature info.
%
*/
MagickPrivate unsigned int GetSignatureDigestsize(
  const SignatureInfo *signature_info)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(signature_info != (SignatureInfo *) NULL);
  assert(signature_info->signature == MagickCoreSignature);
  return(signature_info->digestsize);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   I n i t i a l i z e S i g n a t u r e                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  InitializeSignature() initializes the Signature accumulator.
%
%  The format of the DestroySignatureInfo method is:
%
%      void InitializeSignatureInfo(SignatureInfo *signature_info)
%
%  A description of each parameter follows:
%
%    o signature_info: the cipher signature_info.
%
*/
MagickPrivate void InitializeSignature(SignatureInfo *signature_info)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(signature_info != (SignatureInfo *) NULL);
  assert(signature_info->signature == MagickCoreSignature);
  signature_info->accumulator[0]=0x6a09e667U;
  signature_info->accumulator[1]=0xbb67ae85U;
  signature_info->accumulator[2]=0x3c6ef372U;
  signature_info->accumulator[3]=0xa54ff53aU;
  signature_info->accumulator[4]=0x510e527fU;
  signature_info->accumulator[5]=0x9b05688cU;
  signature_info->accumulator[6]=0x1f83d9abU;
  signature_info->accumulator[7]=0x5be0cd19U;
  signature_info->low_order=0;
  signature_info->high_order=0;
  signature_info->extent=0;
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   S e t S i g n a t u r e D i g e s t                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  SetSignatureDigest() set the signature digest.
%
%  The format of the SetSignatureDigest method is:
%
%      SetSignatureDigest(SignatureInfo *signature_info,
%        const StringInfo *digest)
%
%  A description of each parameter follows:
%
%    o signature_info: the signature info.
%
%    o digest: the digest.
%
*/
MagickPrivate void SetSignatureDigest(SignatureInfo *signature_info,
  const StringInfo *digest)
{
  /*
    Set the signature accumulator.
  */
  assert(signature_info != (SignatureInfo *) NULL);
  assert(signature_info->signature == MagickCoreSignature);
  SetStringInfo(signature_info->digest,digest);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   S i g n a t u r e I m a g e                                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  SignatureImage() computes a message digest from an image pixel stream with
%  an implementation of the NIST SHA-256 Message Digest algorithm.  This
%  signature uniquely identifies the image and is convenient for determining
%  if an image has been modified or whether two images are identical.
%
%  The format of the SignatureImage method is:
%
%      MagickBooleanType SignatureImage(Image *image,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image: the image.
%
%    o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType SignatureImage(Image *image,
  ExceptionInfo *exception)
{
  CacheView
    *image_view;

char
    *hex_signature;

float
    pixel;

SignatureInfo
    *signature_info;

ssize_t
    y;

StringInfo
    *signature;

unsigned char
    *pixels;

/*
    Compute image digital signature.
  */
  assert(image != (Image *) NULL);
  assert(image->signature == MagickCoreSignature);
  if (image->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
  signature_info=AcquireSignatureInfo();
  signature=AcquireStringInfo(GetPixelChannels(image)*image->columns*
    sizeof(pixel));
  image_view=AcquireVirtualCacheView(image,exception);
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    register ssize_t
      x;

p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
    if (p == (const Quantum *) NULL)
      break;
    SetStringInfoLength(signature,GetPixelChannels(image)*image->columns*
      sizeof(pixel));
    pixels=GetStringInfoDatum(signature);
    q=pixels;
    for (x=0; x < (ssize_t) image->columns; x++)
    {
      register ssize_t
        i;

if (GetPixelReadMask(image,p) <= (QuantumRange/2))
        {
          p+=GetPixelChannels(image);
          continue;
        }
      for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
      {
        register ssize_t
          j;

PixelChannel channel = GetPixelChannelChannel(image,i);
        PixelTrait traits = GetPixelChannelTraits(image,channel);
        if ((traits & UpdatePixelTrait) == 0)
          continue;
        pixel=(float) (QuantumScale*p[i]);
        if (signature_info->lsb_first == MagickFalse)
          for (j=(ssize_t) sizeof(pixel)-1; j >= 0; j--)
            *q++=(unsigned char) ((unsigned char *) &pixel)[j];
        else
          for (j=0; j < (ssize_t) sizeof(pixel); j++)
            *q++=(unsigned char) ((unsigned char *) &pixel)[j];
      }
      p+=GetPixelChannels(image);
    }
    SetStringInfoLength(signature,(size_t) (q-pixels));
    UpdateSignature(signature_info,signature);
  }
  image_view=DestroyCacheView(image_view);
  FinalizeSignature(signature_info);
  hex_signature=StringInfoToHexString(GetSignatureDigest(signature_info));
  (void) DeleteImageProperty(image,"signature");
  (void) SetImageProperty(image,"signature",hex_signature,exception);
  /*
    Free resources.
  */
  hex_signature=DestroyString(hex_signature);
  signature=DestroyStringInfo(signature);
  signature_info=DestroySignatureInfo(signature_info);
  return(MagickTrue);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   T r a n s f o r m S i g n a t u r e                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  TransformSignature() transforms the Signature message accumulator.
%
%  The format of the TransformSignature method is:
%
%      TransformSignature(SignatureInfo *signature_info)
%
%  A description of each parameter follows:
%
%    o signature_info: the address of a structure of type SignatureInfo.
%
*/
static void TransformSignature(SignatureInfo *signature_info)
{
#define Ch(x,y,z)  (((x) & (y)) ^ (~(x) & (z)))
#define Maj(x,y,z)  (((x) & (y)) ^ ((x) & (z)) ^ ((y) & (z)))
#define RotateRight(x,n)  (Trunc32(((x) >> n) | ((x) << (32-n))))
#define Sigma0(x)  (RotateRight(x,7) ^ RotateRight(x,18) ^ Trunc32((x) >> 3))
#define Sigma1(x)  (RotateRight(x,17) ^ RotateRight(x,19) ^ Trunc32((x) >> 10))
#define Suma0(x)  (RotateRight(x,2) ^ RotateRight(x,13) ^ RotateRight(x,22))
#define Suma1(x)  (RotateRight(x,6) ^ RotateRight(x,11) ^ RotateRight(x,25))
#define Trunc32(x)  ((unsigned int) ((x) & 0xffffffffU))

ssize_t
    j;

static const unsigned int
    K[64] =
    {
      0x428a2f98U, 0x71374491U, 0xb5c0fbcfU, 0xe9b5dba5U, 0x3956c25bU,
      0x59f111f1U, 0x923f82a4U, 0xab1c5ed5U, 0xd807aa98U, 0x12835b01U,
      0x243185beU, 0x550c7dc3U, 0x72be5d74U, 0x80deb1feU, 0x9bdc06a7U,
      0xc19bf174U, 0xe49b69c1U, 0xefbe4786U, 0x0fc19dc6U, 0x240ca1ccU,
      0x2de92c6fU, 0x4a7484aaU, 0x5cb0a9dcU, 0x76f988daU, 0x983e5152U,
      0xa831c66dU, 0xb00327c8U, 0xbf597fc7U, 0xc6e00bf3U, 0xd5a79147U,
      0x06ca6351U, 0x14292967U, 0x27b70a85U, 0x2e1b2138U, 0x4d2c6dfcU,
      0x53380d13U, 0x650a7354U, 0x766a0abbU, 0x81c2c92eU, 0x92722c85U,
      0xa2bfe8a1U, 0xa81a664bU, 0xc24b8b70U, 0xc76c51a3U, 0xd192e819U,
      0xd6990624U, 0xf40e3585U, 0x106aa070U, 0x19a4c116U, 0x1e376c08U,
      0x2748774cU, 0x34b0bcb5U, 0x391c0cb3U, 0x4ed8aa4aU, 0x5b9cca4fU,
      0x682e6ff3U, 0x748f82eeU, 0x78a5636fU, 0x84c87814U, 0x8cc70208U,
      0x90befffaU, 0xa4506cebU, 0xbef9a3f7U, 0xc67178f2U
    };  /* 32-bit fractional part of the cube root of the first 64 primes */

unsigned int
    A,
    B,
    C,
    D,
    E,
    F,
    G,
    H,
    shift,
    T,
    T1,
    T2,
    W[64];

shift=32;
  p=GetStringInfoDatum(signature_info->message);
  if (signature_info->lsb_first == MagickFalse)
    {
DisableMSCWarning(4127)
      if (sizeof(unsigned int) <= 4)
RestoreMSCWarning
        for (i=0; i < 16; i++)
        {
          T=(*((unsigned int *) p));
          p+=4;
          W[i]=Trunc32(T);
        }
      else
        for (i=0; i < 16; i+=2)
        {
          T=(*((unsigned int *) p));
          p+=8;
          W[i]=Trunc32(T >> shift);
          W[i+1]=Trunc32(T);
        }
    }
  else
DisableMSCWarning(4127)
    if (sizeof(unsigned int) <= 4)
RestoreMSCWarning
      for (i=0; i < 16; i++)
      {
        T=(*((unsigned int *) p));
        p+=4;
        W[i]=((T << 24) & 0xff000000) | ((T << 8) & 0x00ff0000) |
          ((T >> 8) & 0x0000ff00) | ((T >> 24) & 0x000000ff);
      }
    else
      for (i=0; i < 16; i+=2)
      {
        T=(*((unsigned int *) p));
        p+=8;
        W[i]=((T << 24) & 0xff000000) | ((T << 8) & 0x00ff0000) |
          ((T >> 8) & 0x0000ff00) | ((T >> 24) & 0x000000ff);
        T>>=shift;
        W[i+1]=((T << 24) & 0xff000000) | ((T << 8) & 0x00ff0000) |
          ((T >> 8) & 0x0000ff00) | ((T >> 24) & 0x000000ff);
      }
  /*
    Copy accumulator to registers.
  */
  A=signature_info->accumulator[0];
  B=signature_info->accumulator[1];
  C=signature_info->accumulator[2];
  D=signature_info->accumulator[3];
  E=signature_info->accumulator[4];
  F=signature_info->accumulator[5];
  G=signature_info->accumulator[6];
  H=signature_info->accumulator[7];
  for (i=16; i < 64; i++)
    W[i]=Trunc32(Sigma1(W[i-2])+W[i-7]+Sigma0(W[i-15])+W[i-16]);
  for (j=0; j < 64; j++)
  {
    T1=Trunc32(H+Suma1(E)+Ch(E,F,G)+K[j]+W[j]);
    T2=Trunc32(Suma0(A)+Maj(A,B,C));
    H=G;
    G=F;
    F=E;
    E=Trunc32(D+T1);
    D=C;
    C=B;
    B=A;
    A=Trunc32(T1+T2);
  }
  /*
    Add registers back to accumulator.
  */
  signature_info->accumulator[0]=Trunc32(signature_info->accumulator[0]+A);
  signature_info->accumulator[1]=Trunc32(signature_info->accumulator[1]+B);
  signature_info->accumulator[2]=Trunc32(signature_info->accumulator[2]+C);
  signature_info->accumulator[3]=Trunc32(signature_info->accumulator[3]+D);
  signature_info->accumulator[4]=Trunc32(signature_info->accumulator[4]+E);
  signature_info->accumulator[5]=Trunc32(signature_info->accumulator[5]+F);
  signature_info->accumulator[6]=Trunc32(signature_info->accumulator[6]+G);
  signature_info->accumulator[7]=Trunc32(signature_info->accumulator[7]+H);
  /*
    Reset working registers.
  */
  A=0;
  B=0;
  C=0;
  D=0;
  E=0;
  F=0;
  G=0;
  H=0;
  T=0;
  T1=0;
  T2=0;
  (void) memset(W,0,sizeof(W));
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   U p d a t e S i g n a t u r e                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  UpdateSignature() updates the Signature message accumulator.
%
%  The format of the UpdateSignature method is:
%
%      UpdateSignature(SignatureInfo *signature_info,const StringInfo *message)
%
%  A description of each parameter follows:
%
%    o signature_info: the address of a structure of type SignatureInfo.
%
%    o message: the message.
%
*/
MagickPrivate void UpdateSignature(SignatureInfo *signature_info,
  const StringInfo *message)
{
  register size_t
    i;

size_t
    n;

unsigned int
    length;

/*
    Update the Signature accumulator.
  */
  assert(signature_info != (SignatureInfo *) NULL);
  assert(signature_info->signature == MagickCoreSignature);
  n=GetStringInfoLength(message);
  length=Trunc32((unsigned int) (signature_info->low_order+(n << 3)));
  if (length < signature_info->low_order)
    signature_info->high_order++;
  signature_info->low_order=length;
  signature_info->high_order+=(unsigned int) n >> 29;
  p=GetStringInfoDatum(message);
  if (signature_info->extent != 0)
    {
      i=GetStringInfoLength(signature_info->message)-signature_info->extent;
      if (i > n)
        i=n;
      (void) memcpy(GetStringInfoDatum(signature_info->message)+
        signature_info->extent,p,i);
      n-=i;
      p+=i;
      signature_info->extent+=i;
      if (signature_info->extent != GetStringInfoLength(signature_info->message))
        return;
      TransformSignature(signature_info);
    }
  while (n >= GetStringInfoLength(signature_info->message))
  {
    SetStringInfoDatum(signature_info->message,p);
    p+=GetStringInfoLength(signature_info->message);
    n-=GetStringInfoLength(signature_info->message);
    TransformSignature(signature_info);
  }
  (void) memcpy(GetStringInfoDatum(signature_info->message),p,n);
  signature_info->extent=n;
}

${this.title}

Code Editor : signature.c