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added CBC encryption mode (configure --enable-cbc)

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git@daemon.de
2014-01-28 12:20:30 +01:00
parent ad009a8142
commit 5ae1d07067
9 changed files with 166 additions and 65 deletions
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@@ -24,7 +24,7 @@
Detached signatures are still supported as before,
for the user everything with them is as known, but
the commandline option -a (--detach) have to be
the commandline option -f (--sigfile) have to be
applied. Internally, however, inputs will be read in
32k blockwise as well. Detached signatures are now
z85 encoded always.
@@ -39,6 +39,15 @@
doesn't verify. Currently pcp1 failes in this case,
but leaves the decrypted result on disk. Hm...
The default encryption mode with pcp (and pbp as of
this writing) is ECB. Each 32k block is encrypted
independently. While ECB is generally a bad choice,
the 32k blocksize compensates for it. However, just
to have to option, if we decide to use CBC instead,
I already implemented it. It must be enabled at
compile time with ./configure --enable-cbc. CBC mode
in PCP uses a blocksize of 1k.
0.1.5 Fixed a segmentation fault when using pcp1 -t on a
public key. I added a double free() there by purpose
to test segfault catching I added in unittest.pl