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json-parser: detect premature EOI

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Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Anthony Liguori 2011-06-01 12:14:55 -05:00
parent eca7db46ff
commit 11e8a46cc3
1 changed files with 57 additions and 1 deletions
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58
json-parser.c
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@ -275,10 +275,15 @@ out:
*/
static int parse_pair(JSONParserContext *ctxt, QDict *dict, QList **tokens, va_list *ap)
{
QObject *key, *token = NULL, *value, *peek;
QObject *key = NULL, *token = NULL, *value, *peek;
QList *working = qlist_copy(*tokens);
peek = qlist_peek(working);
if (peek == NULL) {
parse_error(ctxt, NULL, "premature EOI");
goto out;
}
key = parse_value(ctxt, &working, ap);
if (!key || qobject_type(key) != QTYPE_QSTRING) {
parse_error(ctxt, peek, "key is not a string in object");
@ -286,6 +291,11 @@ static int parse_pair(JSONParserContext *ctxt, QDict *dict, QList **tokens, va_l
}
token = qlist_pop(working);
if (token == NULL) {
parse_error(ctxt, NULL, "premature EOI");
goto out;
}
if (!token_is_operator(token, ':')) {
parse_error(ctxt, token, "missing : in object pair");
goto out;
@ -321,6 +331,10 @@ static QObject *parse_object(JSONParserContext *ctxt, QList **tokens, va_list *a
QList *working = qlist_copy(*tokens);
token = qlist_pop(working);
if (token == NULL) {
goto out;
}
if (!token_is_operator(token, '{')) {
goto out;
}
@ -330,12 +344,22 @@ static QObject *parse_object(JSONParserContext *ctxt, QList **tokens, va_list *a
dict = qdict_new();
peek = qlist_peek(working);
if (peek == NULL) {
parse_error(ctxt, NULL, "premature EOI");
goto out;
}
if (!token_is_operator(peek, '}')) {
if (parse_pair(ctxt, dict, &working, ap) == -1) {
goto out;
}
token = qlist_pop(working);
if (token == NULL) {
parse_error(ctxt, NULL, "premature EOI");
goto out;
}
while (!token_is_operator(token, '}')) {
if (!token_is_operator(token, ',')) {
parse_error(ctxt, token, "expected separator in dict");
@ -349,6 +373,10 @@ static QObject *parse_object(JSONParserContext *ctxt, QList **tokens, va_list *a
}
token = qlist_pop(working);
if (token == NULL) {
parse_error(ctxt, NULL, "premature EOI");
goto out;
}
}
qobject_decref(token);
token = NULL;
@ -377,6 +405,10 @@ static QObject *parse_array(JSONParserContext *ctxt, QList **tokens, va_list *ap
QList *working = qlist_copy(*tokens);
token = qlist_pop(working);
if (token == NULL) {
goto out;
}
if (!token_is_operator(token, '[')) {
goto out;
}
@ -386,6 +418,11 @@ static QObject *parse_array(JSONParserContext *ctxt, QList **tokens, va_list *ap
list = qlist_new();
peek = qlist_peek(working);
if (peek == NULL) {
parse_error(ctxt, NULL, "premature EOI");
goto out;
}
if (!token_is_operator(peek, ']')) {
QObject *obj;
@ -398,6 +435,11 @@ static QObject *parse_array(JSONParserContext *ctxt, QList **tokens, va_list *ap
qlist_append_obj(list, obj);
token = qlist_pop(working);
if (token == NULL) {
parse_error(ctxt, NULL, "premature EOI");
goto out;
}
while (!token_is_operator(token, ']')) {
if (!token_is_operator(token, ',')) {
parse_error(ctxt, token, "expected separator in list");
@ -416,6 +458,10 @@ static QObject *parse_array(JSONParserContext *ctxt, QList **tokens, va_list *ap
qlist_append_obj(list, obj);
token = qlist_pop(working);
if (token == NULL) {
parse_error(ctxt, NULL, "premature EOI");
goto out;
}
}
qobject_decref(token);
@ -444,6 +490,9 @@ static QObject *parse_keyword(JSONParserContext *ctxt, QList **tokens)
QList *working = qlist_copy(*tokens);
token = qlist_pop(working);
if (token == NULL) {
goto out;
}
if (token_get_type(token) != JSON_KEYWORD) {
goto out;
@ -481,6 +530,9 @@ static QObject *parse_escape(JSONParserContext *ctxt, QList **tokens, va_list *a
}
token = qlist_pop(working);
if (token == NULL) {
goto out;
}
if (token_is_escape(token, "%p")) {
obj = va_arg(*ap, QObject *);
@ -520,6 +572,10 @@ static QObject *parse_literal(JSONParserContext *ctxt, QList **tokens)
QList *working = qlist_copy(*tokens);
token = qlist_pop(working);
if (token == NULL) {
goto out;
}
switch (token_get_type(token)) {
case JSON_STRING:
obj = QOBJECT(qstring_from_escaped_str(ctxt, token));