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Check for NULL pointers in string.c

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This commit is contained in:
milo
2011-02-14 20:23:12 +01:00
parent 11e54e8221
commit 4230509e80
1 changed files with 14 additions and 3 deletions
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17
src/string.c
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@@ -92,7 +92,13 @@ int ssh_string_fill(struct ssh_string_struct *s, const void *data, size_t len) {
*/
struct ssh_string_struct *ssh_string_from_char(const char *what) {
struct ssh_string_struct *ptr = NULL;
size_t len = strlen(what);
size_t len;
if(what == NULL) {
return NULL;
}
len = strlen(what);
ptr = malloc(4 + len);
if (ptr == NULL) {
@@ -133,7 +139,7 @@ size_t ssh_string_len(struct ssh_string_struct *s) {
char *ssh_string_to_char(struct ssh_string_struct *s) {
size_t len;
char *new;
if(s==NULL)
if(s==NULL || s->string == NULL)
return NULL;
len = ntohl(s->size) + 1;
new = malloc(len);
@@ -164,7 +170,12 @@ void ssh_string_free_char(char *s) {
* @return Newly allocated copy of the string, NULL on error.
*/
struct ssh_string_struct *ssh_string_copy(struct ssh_string_struct *s) {
struct ssh_string_struct *new = malloc(ntohl(s->size) + 4);
struct ssh_string_struct *new;
if(s == NULL || s->string == NULL) {
return NULL;
}
new = malloc(ntohl(s->size) + 4);
if (new == NULL) {
return NULL;