1 The server uses a protocol provided by libassuan to communicate with a client.
2 An OK response is returned when a command succeeds or ERR along with an error
3 code and description, if not. When a command requests data for retrieval
4 (e.g., GET) the output is prefixed with D then a single SPACE then the actual
5 data followed by an OK response. Read the libassuan docs for more info about
10 OPEN <filename> [<key>]
11 Opens <filename> using <key>. If file is not found on the file-system, then
12 a new document will be created. If the file is found, it is looked for in
13 the file cache for an existing key. When found, the existing key will be
14 used for decryption. If the cached key fails then the <key>, if specified,
19 Writes the data to disk. The file written to is the file that was opened
20 using the OPEN command. If <key> is not specified then the currently
21 cached key will be used. If the file is a new file or the file isn't found
22 in the file cache, <key> is required.
26 An OK response is returned if the specified file is in the file cache.
29 CLEARCACHE [<filename>]
30 Clears a file cache entry. This will forget the timeout and key for all or
31 the specified file. This command always succeeds.
34 CACHETIMEOUT <seconds> <filename>
35 Specify the number of seconds the specified file will be cached. -1 will
36 keep the cache entry forever, 0 will require the key each time the OPEN or
37 SAVE commands are used.
40 LIST [[!]element[<TAB>[!]element[...]]]
41 If no element path is given then a list of root elements is returned with
42 the data response code. If given, then all reachable elements for the
43 specified element path are returned Each element in the path is prefixed
44 with the literal '!' character when the element contains no "target"
45 attribute (See THE TARGET ATTRIBUTE below).
47 If only a single element is specified and without the literal '!' prefix,
48 both the literal element tree and the element target (if any) tree will be
52 REALPATH [!]element[<TAB>[!]element[...]]
53 Resolves all "target" attributes of the specified element path and returns
54 the result with a data response.
57 STORE [!]element[[<TAB>[!]element[...]]<TAB>[content]]
58 Creates a new element tree or modifies the content of an existing element
59 path. If only a single element is specified, a new root element is
60 created. Otherwise, elements are TAB delimited and the content will be set
61 to the last TAB delimited argument. If no content is specified after the
62 last TAB then the content for the last specified element will be removed
63 or the content will be empty when creating a new element.
65 The only restriction of element names is that they not begin with a
66 punctuation character (the literal '!' character is an exception) or digit
67 and not contain any whitespace. There is no whitespace between the TAB
68 delimited elements. It is recommended that the value be base 64 encoded to
69 prevent libXML and pwmd parsing errors.
71 PWMD reads the element path from the client via the Assuan INQUIRE
72 protocol response. The STORE command is sent by itself without arguments,
73 then the server responds with INQUIRE. The client then sends the element
74 path prefixed by a "D " data response. When finished, the client
75 sends "END" on an empty line. This is needed so an element path and value
76 can be more than 1000 bytes long, the Assuan protocol line limit.
79 DELETE [!]element[<TAB>[!]element[...]]
80 Removes an element tree from the specified element path.
83 GET [!]element[<TAB>[!]element[...]]
84 Retrieves the content of the specified element path. The data is returned
88 ATTR SET|GET|DELETE|LIST [<attribute>] [!]<arg1> [!][arg2]
89 ATTR SET attribute [!]element[<TAB>[!]element[...]] attribute_value
90 Stores or updates an attribute value to an element path.
92 ATTR DELETE attribute [!]element[<TAB>[!]element[...]]
93 Removes an attribute from an element path.
95 ATTR LIST [!]element[<TAB>[!]element[...]]
96 Gets a list of attributes from an element path.
98 ATTR GET attribute [!]element[<TAB>[!]element[...]]
99 Gets the value of an attribute from an element path.
101 The "name" attribute (case sensitive) cannot be removed with ATTR DELETE
102 if the element path is only a root element. Although it can be SET
103 to change the root element name.
105 See THE TARGET ATTRIBUTE below.
109 Shows the in memory XML document with indenting.
112 GETCONFIG <parameter>
113 Returns the value of a pwmd configuration variable with a data response.
114 If no file is open then the default value will be returned. The "key" and
115 "key_file" variables are ignored.
119 Closes the connection. Use the SAVE command before this command as any
120 changes will be lost.
123 If a command fails then the ERR response is returned followed by a protocol
124 error code and description. See src/pwmd_error.h or libpwmd/libpwmd.h for
130 There is a special attribute "target" (case sensitive) that can be set with
131 ATTR SET. The value of this attribute is an element path somewhere else in the
134 ATTR SET target [!]element[<TAB>[!]element[..]] [!]element[<TAB>[!]element[..]]
135 arg1^^^^^^^^^^^^^^^^^^^^^^^^ arg2^^^^^^^^^^^^^^^^^^^^^^^^
137 If the element path of the "target" attribute doesn't exist, it is created.
138 This is the only time the ATTR command will create elements.
140 When a protocol command requests <arg1> as the element path, the remaining
141 elements after the element with the "target" attribute will be appended to
142 <arg2>. This is useful if you have elements that share the same data. If the
143 target is modified, the other elements "pointing" to the target will have the
144 same content. To get the real or literal element and ignore any "target"
145 attributes, prefix an element with a '!' character. Here's an example:
149 C> D host1<TAB>username<TAB>original username
154 C> D host2<TAB>smtp<TAB>username<TAB>someuser
157 C> ATTR SET target host1<TAB>username host2<TAB>smtp<TAB>username
160 Now host1's "target" attribute will be used:
162 C> GET host1<TAB>username
166 If you want host1's username, prefix the element path of the GET (or other
167 command) element path with a '!':
169 C> GET !host1<TAB>username
170 S> D original username
173 The target value (<arg2>) element can also have a "target" attribute:
175 C> ATTR SET target new_account host1
177 C> GET new_account<TAB>username
181 The value of the "target" attribute may also be prefixed with a '!' to set the
182 target to the actual element path and not a target of the element path:
184 C> ATTR DELETE target !new_account
186 C> ATTR SET target new_account<TAB>username !host1<TAB>username
188 C> GET new_account<TAB>username
189 S> D original username
192 If the target element has been renamed or deleted afterwards, the command will
195 Client's should be careful of creating target loops (a target that references
196 itself). There's no way to break out of it unless the client disconnects or
197 until memory runs out.
200 XML DOCUMENT STRUCTURE
201 ----------------------
202 When importing an XML data file with the -I command line option, the document
203 should have the following DTD:
205 <?xml version="1.0"?>
207 <!ELEMENT accounts (account*)>
208 <!ATTLIST account name CDATA #REQUIRED>
211 "accounts" is the document root element while each root element mentioned
212 in the above commands uses the "account" element. So if you have a root
213 element shown with the LIST command that shows "isp", the document
214 structure looks like this:
222 The DUMP command can be useful to show the current document structure.
225 Questions, bugs or feature requests can be sent to Ben Kibbey