Documentation ¶
Overview ¶
Tlogdb is a trivial transparent log client and server. It is meant as more a starting point to be customized than a tool to be used directly.
A transparent log is a tamper-proof, append-only, immutable log of data records. That is, if the server were to violate the “append-only, immutable” properties, that tampering would be detected by the client. For more about transparent logs, see https://research.swtch.com/tlog.
Server Operations ¶
To create a new log (new server state):
tlogdb [-f file] newlog $servername
The newlog command creates a new database in file (default tlog.db) containing an empty log and a newly generated public/private key pair for the server using the given name.
The newlog command prints the newly generated public key. To see it again:
tlogdb [-f file] publickey
To add a record named name to the log:
cat data | tlogdb [-f file] add name
To serve the authenticated log data:
tlogdb [-a addr] [-f file] serve
The default server address is localhost:6655.
Client Operations ¶
The client maintains a cache database both for performance (avoiding duplicate downloads) and for storing the server's public key and the most recently seen log head.
To create a new client cache:
tlogdb [-c file] newcache key
The newcache command creates a new database in file (default tlogclient.db) and stores the given public key for later use. The key should be the output of the tlogdb's server commands newlog or publickey, described above.
To look up a record in the log:
tlogdb [-a addr] [-c file] lookup name
The default server address is again localhost:6655.
HTTP Protocol ¶
The protocol between client and server is the same as used in the Go module checksum database, documented at https://golang.org/design/25530-sumdb#checksum-database.
There are three endpoints: /latest serves a signed tree head; /lookup/NAME looks up the given name, and /tile/* serves log tiles.
Example ¶
Putting the various commands together in a Unix shell:
rm -f tlog.db tlogclient.db go build ./tlogdb newlog myname ./tlogdb publickey echo hello world | ./tlogdb add greeting ./tlogdb serve & ./tlogdb newcache $(./tlogdb publickey) ./tlogdb lookup greeting kill $!
Directories ¶
Path | Synopsis |
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internal
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database
Package database implements a checksum database backed by an underlying transactional key-value store.
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Package database implements a checksum database backed by an underlying transactional key-value store. |
Package sumdb implements the HTTP protocols for serving or accessing a generalized checksum database.
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Package sumdb implements the HTTP protocols for serving or accessing a generalized checksum database. |