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-rw-r--r--common/lexer.c239
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diff --git a/common/lexer.c b/common/lexer.c
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-/*
- * Copyright (c) 2005 Stefan Walter
- * Copyright (c) 2011 Collabora Ltd.
- * Copyright (c) 2013 Red Hat Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above
- * copyright notice, this list of conditions and the
- * following disclaimer.
- * * 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.
- * * The names of contributors to this software may not be
- * used to endorse or promote products derived from this
- * software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "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
- * COPYRIGHT OWNER OR CONTRIBUTORS 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.
- *
- *
- * CONTRIBUTORS
- * Stef Walter <stefw@redhat.com>
- */
-
-#include "config.h"
-
-#define P11_DEBUG_FLAG P11_DEBUG_CONF
-#include "debug.h"
-#include "lexer.h"
-#include "message.h"
-
-#include <assert.h>
-#include <ctype.h>
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-void
-p11_lexer_init (p11_lexer *lexer,
- const char *filename,
- const char *data,
- size_t length)
-{
- return_if_fail (lexer != NULL);
-
- memset (lexer, 0, sizeof (p11_lexer));
- lexer->at = data;
- lexer->remaining = length;
-
- return_if_fail (filename != NULL);
- lexer->filename = strdup (filename);
- return_if_fail (lexer->filename != NULL);
-}
-
-static void
-clear_state (p11_lexer *lexer)
-{
- switch (lexer->tok_type) {
- case TOK_FIELD:
- free (lexer->tok.field.name);
- free (lexer->tok.field.value);
- break;
- case TOK_SECTION:
- free (lexer->tok.section.name);
- break;
- case TOK_PEM:
- case TOK_EOF:
- break;
- }
-
- memset (&lexer->tok, 0, sizeof (lexer->tok));
- lexer->tok_type = TOK_EOF;
- lexer->complained = false;
-}
-
-bool
-p11_lexer_next (p11_lexer *lexer,
- bool *failed)
-{
- const char *colon;
- const char *value;
- const char *line;
- const char *end;
- const char *pos;
- char *part;
-
- return_val_if_fail (lexer != NULL, false);
-
- clear_state (lexer);
- if (failed)
- *failed = false;
-
- /* Go through lines and process them */
- while (lexer->remaining != 0) {
- assert (lexer->remaining > 0);
-
- /* Is this line the start of a PEM block? */
- if (strncmp (lexer->at, "-----BEGIN ", 11) == 0) {
- pos = strnstr (lexer->at, "\n-----END ", lexer->remaining);
- if (pos != NULL) {
- end = memchr (pos + 1, '\n', lexer->remaining - (pos - lexer->at) - 1);
- if (end)
- end += 1;
- else
- end = lexer->at + lexer->remaining;
- lexer->tok_type = TOK_PEM;
- lexer->tok.pem.begin = lexer->at;
- lexer->tok.pem.length = end - lexer->at;
- assert (end - lexer->at <= lexer->remaining);
- lexer->remaining -= (end - lexer->at);
- lexer->at = end;
- return true;
- }
-
- p11_lexer_msg (lexer, "invalid pem block: no ending line");
- if (failed)
- *failed = true;
- return false;
- }
-
- line = lexer->at;
- end = memchr (lexer->at, '\n', lexer->remaining);
- if (end == NULL) {
- end = lexer->at + lexer->remaining;
- lexer->remaining = 0;
- lexer->at = end;
- } else {
- assert ((end - lexer->at) + 1 <= lexer->remaining);
- lexer->remaining -= (end - lexer->at) + 1;
- lexer->at = end + 1;
- }
-
- /* Strip whitespace from line */
- while (line != end && isspace (line[0]))
- ++line;
- while (line != end && isspace (*(end - 1)))
- --end;
-
- /* Empty lines / comments at start */
- if (line == end || line[0] == '#')
- continue;
-
- /* Is the the a section ? */
- if (line[0] == '[') {
- if (*(end - 1) != ']') {
- part = strndup (line, end - line);
- p11_lexer_msg (lexer, "invalid section header: missing braces");
- free (part);
- if (failed)
- *failed = true;
- return false;
- }
-
- lexer->tok_type = TOK_SECTION;
- lexer->tok.section.name = strndup (line + 1, (end - line) - 2);
- return_val_if_fail (lexer->tok.section.name != NULL, false);
- return true;
- }
-
- /* Look for the break between name: value on the same line */
- colon = memchr (line, ':', end - line);
- if (!colon) {
- part = strndup (line, end - line);
- p11_lexer_msg (lexer, "invalid field line: no colon");
- free (part);
- if (failed)
- *failed = true;
- return false;
- }
-
- /* Strip whitespace from name and value */
- value = colon + 1;
- while (value != end && isspace (value[0]))
- ++value;
- while (line != colon && isspace (*(colon - 1)))
- --colon;
-
- lexer->tok_type = TOK_FIELD;
- lexer->tok.field.name = strndup (line, colon - line);
- lexer->tok.field.value = strndup (value, end - value);
- return_val_if_fail (lexer->tok.field.name && lexer->tok.field.value, false);
- return true;
- }
-
- return false;
-}
-
-void
-p11_lexer_done (p11_lexer *lexer)
-{
- return_if_fail (lexer != NULL);
- clear_state (lexer);
- free (lexer->filename);
- memset (lexer, 0, sizeof (p11_lexer));
-}
-
-void
-p11_lexer_msg (p11_lexer *lexer,
- const char *msg)
-{
- return_if_fail (lexer != NULL);
-
- if (lexer->complained)
- return;
-
- switch (lexer->tok_type) {
- case TOK_FIELD:
- p11_message ("%s: %s: %s", lexer->filename,
- lexer->tok.field.name, msg);
- break;
- case TOK_SECTION:
- p11_message ("%s: [%s]: %s", lexer->filename,
- lexer->tok.section.name, msg);
- break;
- case TOK_PEM:
- p11_message ("%s: BEGIN ...: %s", lexer->filename, msg);
- break;
- default:
- p11_message ("%s: %s", lexer->filename, msg);
- break;
- }
-
- lexer->complained = true;
-}
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