3 thumbprint \- public key thumbprints
6 Applications in Plan 9 that use public keys for authentication,
13 check the remote side's public key by comparing against
14 thumbprints from a trusted list.
15 The list is maintained by people who set local policies
16 about which servers can be trusted for which applications,
17 thereby playing the role taken by certificate authorities
19 By convention, these lists are stored as files in
21 and protected by normal file system permissions.
23 Such a thumbprint file comprises lines made up of
24 attribute/value pairs of the form
28 The first attribute must be
30 and the second must be
31 .BI sha1= {hex checksum of binary certificate}.
32 All other attributes are treated as comments.
33 The file may also contain lines of the form
36 For example, a web server might have thumbprint
38 x509 sha1=8fe472d31b360a8303cd29f92bd734813cbd923c cn=*.cs.bell-labs.com