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Mirek Kratochvil 2014-03-19 09:33:34 +01:00
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21
man/ccr.1
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@ -266,9 +266,11 @@ can rename or delete more keys at once.
Codecrypt is not very good for working directly with large files. Because of
the message format and code clarity, whole input files and messages are usually
loaded into memory before getting signed/encrypted. Fixing the problem requires
some deep structural changes in Codecrypt, but you can easily workaround the
whole problem using symmetric ciphers (for encryption of large files) or
hashfiles (for signatures of large files). See the \fB\-\-symmetric\fR option.
some deep structural changes in Codecrypt that would break most of the achieved
internal simplicity, therefore the fix is probably not going to happen. You can
easily workaround the whole problem using symmetric ciphers (for encryption of
large files) or hashfiles (for signatures of large files). See the
\fB\-\-symmetric\fR option.
FMTSeq signatures are constructed from one-time signature scheme, for this
reason the private key changes after each signature, basically by increasing
@ -303,6 +305,19 @@ A: KeyID algorithm changed after that version. If you want, you can manually
rewrite the message sencode envelopes to contain new recipient/signer KeyIDs
and new message identificators, things should work perfectly after that.
Q: Some signatures from version 1.5 and older fail to verify!
A: There was a slight mistake in padding of messages shorter than signature
hash function size (64 bytes in the 256-bit-secure signature types) with no
security implications. It was decided not to provide backward compatibility for
this minor use-case. If you really need to verify such signatures, edit the
msg_pad function in src/algos_sig.h so that the `load_key()' function os called
on empty vector instead of `out'.
Q: I want to sign/encrypt a large file but it took all my RAM and takes ages!
A: Use \fB--symmetric\fR option. See the `CAVEATS' section for more details.
.SH EXAMPLE
Following commands roughly demonstrate command line usage of \fBccr\fR:
.nf