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Add have_ssh_host_key() and use it to influence algorithm selection.

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The general plan is that if PuTTY knows a host key for a server, it
should preferentially ask for the same type of key so that there's some
chance of actually getting the same key again.  This should mean that
when a server (or PuTTY) adds a new host key type, PuTTY doesn't
gratuitously switch to that key type and then warn the user about an
unrecognised key.
This commit is contained in:
Ben Harris
2015-05-29 22:40:50 +01:00
parent e222db14ff
commit d21041f7f8
4 changed files with 37 additions and 1 deletions
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10
windows/winstore.c
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@ -454,6 +454,16 @@ int verify_host_key(const char *hostname, int port,
return 0; /* key matched OK in registry */
}
int have_ssh_host_key(const char *hostname, int port,
const char *keytype)
{
/*
* If we have a host key, verify_host_key will return 0 or 2.
* If we don't have one, it'll return 1.
*/
return verify_host_key(hostname, port, keytype, "") != 1;
}
void store_host_key(const char *hostname, int port,
const char *keytype, const char *key)
{