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parser: accept only RFC 8259 whitespace between tokens #1076

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parser: accept only RFC 8259 whitespace between tokens #1076

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13 changes: 11 additions & 2 deletions cJSON.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1099,9 +1099,18 @@ static parse_buffer *buffer_skip_whitespace(parse_buffer * const buffer)
return buffer;
}

while (can_access_at_index(buffer, 0) && (buffer_at_offset(buffer)[0] <= 32))
/* RFC 8259 whitespace: only ' ', '\t', '\n', '\r'. The old
* `<= 32` accepted every control byte (NUL, 0x01, 0x0b, 0x0c,
* 0x1f, ...) as whitespace between tokens, so cJSON_ParseWith
* LengthOpts("[\\x0b1]", 5, NULL, 1) would parse [1]. */
while (can_access_at_index(buffer, 0))
{
buffer->offset++;
unsigned char c = buffer_at_offset(buffer)[0];
if ((c != ' ') && (c != '\t') && (c != '\n') && (c != '\r'))
{
break;
}
buffer->offset++;
}

if (buffer->offset == buffer->length)
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