iotests/207: Filter host fingerprint

Commit e3296cc made the ssh block
driver's error message for fingerprint mismatches more verbose, so it
now prints the actual host key fingerprint and the key type.

iotest 207 tests such errors, but was not amended to filter that
fingerprint (which is host-specific), so do it now.  Filter the key
type, too, because I guess this too can differ depending on the host
configuration.

Fixes: e3296cc
       ("block: print the server key type and fingerprint on failure")
Reported-by: John Snow <jsnow@redhat.com>
Signed-off-by: Hanna Reitz <hreitz@redhat.com>
Message-Id: <20220318125304.66131-3-hreitz@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>

tests/qemu-iotests/207

@@ -35,7 +35,12 @@ def filter_hash(qmsg):
         if key == 'hash' and re.match('[0-9a-f]+', value):
             return 'HASH'
         return value
-    return iotests.filter_qmp(qmsg, _filter)
+    if isinstance(qmsg, str):
+        # Strip key type and fingerprint
+        p = r"\S+ (key fingerprint) '(md5|sha1|sha256):[0-9a-f]+'"
+        return re.sub(p, r"\1 '\2:HASH'", qmsg)
+    else:
+        return iotests.filter_qmp(qmsg, _filter)
 
 def blockdev_create(vm, options):
     vm.blockdev_create(options, filters=[iotests.filter_qmp_testfiles, filter_hash])

tests/qemu-iotests/207.out

@@ -42,7 +42,7 @@ virtual size: 4 MiB (4194304 bytes)
 
 {"execute": "blockdev-create", "arguments": {"job-id": "job0", "options": {"driver": "ssh", "location": {"host-key-check": {"hash": "wrong", "mode": "hash", "type": "md5"}, "path": "TEST_DIR/PID-t.img", "server": {"host": "127.0.0.1", "port": "22"}}, "size": 2097152}}}
 {"return": {}}
-Job failed: remote host key does not match host_key_check 'wrong'
+Job failed: remote host key fingerprint 'md5:HASH' does not match host_key_check 'md5:wrong'
 {"execute": "job-dismiss", "arguments": {"id": "job0"}}
 {"return": {}}
 
@@ -59,7 +59,7 @@ virtual size: 8 MiB (8388608 bytes)
 
 {"execute": "blockdev-create", "arguments": {"job-id": "job0", "options": {"driver": "ssh", "location": {"host-key-check": {"hash": "wrong", "mode": "hash", "type": "sha1"}, "path": "TEST_DIR/PID-t.img", "server": {"host": "127.0.0.1", "port": "22"}}, "size": 2097152}}}
 {"return": {}}
-Job failed: remote host key does not match host_key_check 'wrong'
+Job failed: remote host key fingerprint 'sha1:HASH' does not match host_key_check 'sha1:wrong'
 {"execute": "job-dismiss", "arguments": {"id": "job0"}}
 {"return": {}}
 
@@ -76,7 +76,7 @@ virtual size: 4 MiB (4194304 bytes)
 
 {"execute": "blockdev-create", "arguments": {"job-id": "job0", "options": {"driver": "ssh", "location": {"host-key-check": {"hash": "wrong", "mode": "hash", "type": "sha256"}, "path": "TEST_DIR/PID-t.img", "server": {"host": "127.0.0.1", "port": "22"}}, "size": 2097152}}}
 {"return": {}}
-Job failed: remote host key does not match host_key_check 'wrong'
+Job failed: remote host key fingerprint 'sha256:HASH' does not match host_key_check 'sha256:wrong'
 {"execute": "job-dismiss", "arguments": {"id": "job0"}}
 {"return": {}}