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added message entitlement mach when malformed

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This commit is contained in:
Álvaro Felipe Melchor 2016-09-08 10:22:43 +02:00
parent b86f1c471d
commit 61fd4f6d0d
1 changed files with 12 additions and 3 deletions
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15
libr/bin/format/mach0/mach0.c
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@ -386,8 +386,9 @@ static int parse_dysymtab(struct MACH0_(obj_t)* bin, ut64 off) {
}
static bool parse_signature(struct MACH0_(obj_t) *bin, ut64 off) {
int i, len;
int i, len;
ut32 count, data;
bin->signature = NULL;
struct linkedit_data_command link = {};
if (off > bin->size || off + sizeof (struct linkedit_data_command) > bin->size) {
return false;
@ -399,18 +400,21 @@ static bool parse_signature(struct MACH0_(obj_t) *bin, ut64 off) {
}
data = link.dataoff;
if (data > bin->size || data + sizeof (struct super_blob_t) > bin->size) {
return false;
bin->signature = (ut8 *)strdup ("Malformed entitlement");
return true;
}
struct super_blob_t *super = (struct super_blob_t *) (bin->b->buf + data);
count = r_read_ble32 (&super->count, little_);
for (i = 0; i < count; ++i) {
if ((ut8 *)(super->index + i + 1) > (ut8 *)(bin->b->buf + bin->size)) {
bin->signature = (ut8 *)strdup ("Malformed entitlement");
break;
}
//int slot = r_read_ble32 (&super->index[i].type, little_);
if (r_read_ble32 (&super->index[i].type, little_) == CSSLOT_ENTITLEMENTS) {
ut32 begin = r_read_ble32 (&super->index[i].offset, little_);
if (begin > bin->size || begin + sizeof (struct blob_t) > bin->size) {
bin->signature = (ut8 *)strdup ("Malformed entitlement");
break;
}
struct blob_t *entitlements = (struct blob_t *) ((ut8*)super + begin);
@ -422,11 +426,16 @@ static bool parse_signature(struct MACH0_(obj_t) *bin, ut64 off) {
bin->signature[len] = '\0';
return true;
}
} else {
bin->signature = (ut8 *)strdup ("Malformed entitlement");
}
break;
}
}
return false;
if (!bin->signature) {
bin->signature = (ut8 *)strdup ("No entitlement found");
}
return true;
}
static int parse_thread(struct MACH0_(obj_t)* bin, struct load_command *lc, ut64 off, bool is_first_thread) {