Copyright 1999-2003 John D. Polstra.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgment:
* This product includes software developed by John D. Polstra.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: Passwd.m3.html,v 1.3 2010-04-29 17:19:53 wagner Exp $
MODULE Passwd;
IMPORT
ErrMsg, FileRd, Fmt, Logger, OSError, Pathname, Rd, Text, Thread,
TokScan;
REVEAL
DB = BRANDED OBJECT
path: Pathname.T;
rd: Rd.T;
lineNum := 0;
startIndex: CARDINAL;
startLineNum: CARDINAL;
realm: TEXT;
privateKey: TEXT;
END;
PROCEDURE Close(db: DB)
RAISES {Error, Thread.Alerted} =
BEGIN
TRY
Rd.Close(db.rd);
EXCEPT Rd.Failure(l) =>
RAISE Error("Cannot close \"" & db.path & "\": " & ErrMsg.StrError(l));
END;
END Close;
PROCEDURE Err(db: DB; msg: TEXT)
RAISES {Error} =
BEGIN
RAISE Error(db.path & ":" & Fmt.Int(db.lineNum) & ": " & msg);
END Err;
PROCEDURE GetPrivateKey(db: DB): TEXT =
BEGIN
RETURN db.privateKey;
END GetPrivateKey;
PROCEDURE GetRealm(db: DB): TEXT =
BEGIN
RETURN db.realm;
END GetRealm;
PROCEDURE GetRec(db: DB): TokScan.T
RAISES {Error, Rd.EndOfFile, Thread.Alerted} =
VAR
line: TEXT;
BEGIN
TRY
REPEAT
INC(db.lineNum);
line := TokScan.Trim(Rd.GetLine(db.rd));
UNTIL Text.Length(line) > 0 AND Text.GetChar(line, 0) # '#';
EXCEPT Rd.Failure(l) =>
Err(db, "read error: " & ErrMsg.StrError(l));
END;
RETURN TokScan.New(line, SET OF CHAR{':'}, emptyTokens := TRUE);
END GetRec;
PROCEDURE Lookup(db: DB;
client: TEXT;
logger: Logger.T := NIL): T
RAISES {Error, Thread.Alerted} =
VAR
startingPoint: CARDINAL;
ts: TokScan.T;
found: BOOLEAN;
ent: T;
BEGIN
TRY
startingPoint := Rd.Index(db.rd);
ent := NEW(T);
REPEAT
TRY
ts := GetRec(db);
ent.client := ts.getToken("client name");
ent.sharedSecret := ts.getToken("shared secret");
ent.class := ts.getToken("class");
ent.comment := ts.getToken("comment");
found := TokScan.EqualFolded(ent.client, client);
EXCEPT
| Rd.EndOfFile =>
Rd.Seek(db.rd, db.startIndex);
db.lineNum := db.startLineNum;
| TokScan.Error(msg) =>
IF logger # NIL THEN
Logger.Warning(logger, db.path & ":" & Fmt.Int(db.lineNum) &
": " & msg);
END;
END;
UNTIL found OR Rd.Index(db.rd) = startingPoint;
IF NOT found THEN RETURN NIL END;
EXCEPT
| Rd.Failure(l) =>
RAISE Error("Cannot rewind \"" & db.path & "\": " &
ErrMsg.StrError(l));
END;
RETURN ent;
END Lookup;
PROCEDURE Open(path: Pathname.T): DB
RAISES {OSError.E, Error, Thread.Alerted} =
VAR
db: DB;
ts: TokScan.T;
BEGIN
TRY
db := NEW(DB, path := path, rd := FileRd.Open(path));
ts := GetRec(db);
db.startIndex := Rd.Index(db.rd);
db.startLineNum := db.lineNum;
db.realm := ts.getToken("server name");
db.privateKey := ts.getToken("server private key");
ts.getEnd("end of server record");
EXCEPT
| Rd.EndOfFile =>
RAISE Error(path & ": no server record in file");
| TokScan.Error(msg) =>
Err(db, msg);
END;
RETURN db;
END Open;
BEGIN
END Passwd.