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cmdgen: option to specify the random number device to use.

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E.g. you might pass '--random-device=/dev/urandom'.

Mostly because I got sick of waiting for /dev/random to finish
blocking while I was trying to generate throwaway keys for testing bug
fixes in cmdgen itself. But it might also be useful on systems that
call their random device by a different name that we haven't
encountered.

(Since cmdgen also reads the saved PuTTY random seed file, setting
this option to /dev/zero will not render key generation deterministic.
It's tempting to provide _some_ way to do that, for testing purposes
and clearly marked as dangerous of course, but I think it would take
more faff than this.)
This commit is contained in:
Simon Tatham
2016-03-30 08:17:03 +01:00
parent ad87950539
commit 435b29da88
3 changed files with 27 additions and 7 deletions
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putty.h
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@ -1352,7 +1352,7 @@ void filename_free(Filename *fn);
int filename_serialise(const Filename *f, void *data);
Filename *filename_deserialise(void *data, int maxsize, int *used);
char *get_username(void); /* return value needs freeing */
char *get_random_data(int bytes); /* used in cmdgen.c */
char *get_random_data(int bytes, const char *device); /* used in cmdgen.c */
char filename_char_sanitise(char c); /* rewrite special pathname chars */
/*