Fix other memory alignment issues

Similar to George McCollister's patch to the pam code, this patch fixes
other places in the code where we forced data into 32-bit alignment.

Fixes: #390

2 files changed, 20 insertions, 14 deletions

diff --git a/server/providers/ldap/ldap_child.c b/server/providers/ldap/ldap_child.c
index a17bcad07..448a9cc6a 100644
--- a/server/providers/ldap/ldap_child.c
+++ b/server/providers/ldap/ldap_child.c
@@ -54,7 +54,7 @@ static errno_t unpack_buffer(uint8_t *buf, size_t size,
         DEBUG(1, ("Error: buffer too big!\n"));
         return EINVAL;
     }
-    len = ((uint32_t *)(buf + p))[0];
+    memcpy(&len, buf + p, sizeof(uint32_t));
     p += sizeof(uint32_t);
 
     DEBUG(7, ("realm_str size: %d\n", len));
@@ -68,7 +68,7 @@ static errno_t unpack_buffer(uint8_t *buf, size_t size,
 
     /* princ_str size and length */
     if ((p + sizeof(uint32_t)) > size) return EINVAL;
-    len = ((uint32_t *)(buf + p))[0];
+    memcpy(&len, buf + p, sizeof(uint32_t));
     p += sizeof(uint32_t);
 
     DEBUG(7, ("princ_str size: %d\n", len));
@@ -82,7 +82,7 @@ static errno_t unpack_buffer(uint8_t *buf, size_t size,
 
     /* keytab_name size and length */
     if ((p + sizeof(uint32_t)) > size) return EINVAL;
-    len = ((uint32_t *)(buf + p))[0];
+    memcpy(&len, buf + p, sizeof(uint32_t));
     p += sizeof(uint32_t);
 
     DEBUG(7, ("keytab_name size: %d\n", len));
@@ -101,16 +101,19 @@ static int pack_buffer(struct response *r, int result, const char *msg)
 {
     int len;
     int p = 0;
+    uint32_t c;
 
     len = strlen(msg);
     r->size = 2 * sizeof(uint32_t) + len;
 
     /* result */
-    ((uint32_t *)(&r->buf[p]))[0] = result;
+    c = result;
+    memcpy(&r->buf[p], &c, sizeof(uint32_t));
     p += sizeof(uint32_t);
 
     /* message size */
-    ((uint32_t *)(&r->buf[p]))[0] = len;
+    c = len;
+    memcpy(&r->buf[p], &c, sizeof(uint32_t));
     p += sizeof(uint32_t);
 
     /* message itself */
diff --git a/server/providers/ldap/sdap_child_helpers.c b/server/providers/ldap/sdap_child_helpers.c
index 862dacf9e..7f743d7fa 100644
--- a/server/providers/ldap/sdap_child_helpers.c
+++ b/server/providers/ldap/sdap_child_helpers.c
@@ -168,36 +168,39 @@ static errno_t create_tgt_req_send_buffer(TALLOC_CTX *mem_ctx,
     /* realm */
     if (realm_str) {
         len = strlen(realm_str);
-        ((uint32_t *)(&buf->data[rp]))[0] = len;
+        memcpy(&buf->data[rp], &len, sizeof(uint32_t));
         rp += sizeof(uint32_t);
         memcpy(&buf->data[rp], realm_str, len);
         rp += len;
     } else {
-        ((uint32_t *)(&buf->data[rp]))[0] = 0;
+        len = 0;
+        memcpy(&buf->data[rp], &len, sizeof(uint32_t));
         rp += sizeof(uint32_t);
     }
 
     /* principal */
     if (princ_str) {
         len = strlen(princ_str);
-        ((uint32_t *)(&buf->data[rp]))[0] = len;
+        memcpy(&buf->data[rp], &len, sizeof(uint32_t));
         rp += sizeof(uint32_t);
         memcpy(&buf->data[rp], princ_str, len);
         rp += len;
     } else {
-        ((uint32_t *)(&buf->data[rp]))[0] = 0;
+        len = 0;
+        memcpy(&buf->data[rp], &len, sizeof(uint32_t));
         rp += sizeof(uint32_t);
     }
 
     /* keytab */
     if (keytab_name) {
         len = strlen(keytab_name);
-        ((uint32_t *)(&buf->data[rp]))[0] = len;
+        memcpy(&buf->data[rp], &len, sizeof(uint32_t));
         rp += sizeof(uint32_t);
         memcpy(&buf->data[rp], keytab_name, len);
         rp += len;
     } else {
-        ((uint32_t *)(&buf->data[rp]))[0] = 0;
+        len = 0;
+        memcpy(&buf->data[rp], &len, sizeof(uint32_t));
         rp += sizeof(uint32_t);
     }
 
@@ -214,14 +217,14 @@ static int parse_child_response(TALLOC_CTX *mem_ctx,
     uint32_t res;
     char *ccn;
 
-    /* operatoin result code */
+    /* operation result code */
     if ((p + sizeof(uint32_t)) > size) return EINVAL;
-    res = *((uint32_t *)(buf + p));
+    memcpy(&res, buf + p, sizeof(uint32_t));
     p += sizeof(uint32_t);
 
     /* ccache name size */
     if ((p + sizeof(uint32_t)) > size) return EINVAL;
-    len = *((uint32_t *)(buf + p));
+    memcpy(&len, buf + p, sizeof(uint32_t));
     p += sizeof(uint32_t);
 
     if ((p + len ) > size) return EINVAL;