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fixes invalid memory acceess

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This commit is contained in:
Falk Werner 2019-03-03 18:02:02 +01:00
parent 519ec3a178
commit de454516cb
1 changed files with 15 additions and 15 deletions
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30
lib/wsfs/adapter/operation/read.c
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@ -10,32 +10,32 @@
#define WSFS_MAX_READ_LENGTH 4096 #define WSFS_MAX_READ_LENGTH 4096
static wsfs_status wsfs_fill_buffer( static char * wsfs_fill_buffer(
char * * buffer,
char const * format,
char const * data, char const * data,
size_t count) char const * format,
size_t count,
wsfs_status * status)
{ {
wsfs_status status = WSFS_GOOD; *status = WSFS_GOOD;
char * buffer = malloc(count + 1);
if (0 < count) if ((NULL != buffer) && (0 < count))
{ {
*buffer = malloc(count);
if (0 == strcmp("identity", format)) if (0 == strcmp("identity", format))
{ {
memcpy(*buffer, data, count); /* Flawfinder: ignore */ memcpy(buffer, data, count); /* Flawfinder: ignore */
} }
else if (0 == strcmp("base64", format)) else if (0 == strcmp("base64", format))
{ {
lws_b64_decode_string(data, *buffer, count); lws_b64_decode_string(data, buffer, count + 1);
} }
else else
{ {
status = WSFS_BAD; *status = WSFS_BAD;
} }
} }
return status; return buffer;
} }
static void wsfs_operation_read_finished(void * user_data, wsfs_status status, json_t const * data) static void wsfs_operation_read_finished(void * user_data, wsfs_status status, json_t const * data)
@ -50,15 +50,15 @@ static void wsfs_operation_read_finished(void * user_data, wsfs_status status, j
json_t * format_holder = json_object_get(data, "format"); json_t * format_holder = json_object_get(data, "format");
json_t * count_holder = json_object_get(data, "count"); json_t * count_holder = json_object_get(data, "count");
if ((NULL != data_holder) && (json_is_string(data_holder)) && if (json_is_string(data_holder) &&
(NULL != format_holder) && (json_is_string(format_holder)) && json_is_string(format_holder) &&
(NULL != count_holder) && (json_is_integer(count_holder))) json_is_integer(count_holder))
{ {
char const * const data = json_string_value(data_holder); char const * const data = json_string_value(data_holder);
char const * const format = json_string_value(format_holder); char const * const format = json_string_value(format_holder);
length = (size_t) json_integer_value(count_holder); length = (size_t) json_integer_value(count_holder);
status = wsfs_fill_buffer(&buffer, format, data, length); buffer = wsfs_fill_buffer(data, format, length, &status);
} }
else else
{ {