[njs] Fixed unitialized value usage warning.

[Dmitry Volyntsev]

details:   https://hg.nginx.org/njs/rev/1a5d22feadc2
branches:  
changeset: 2023:1a5d22feadc2
user:      Dmitry Volyntsev <xeioex at nginx.com>
date:      Thu Jan 05 22:05:03 2023 -0800
description:
Fixed unitialized value usage warning.

Found by Coverity (CID 1518908).

diffstat:

 external/njs_webcrypto_module.c |  7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)

diffs (33 lines):

diff -r 2a412a132cf2 -r 1a5d22feadc2 external/njs_webcrypto_module.c
--- a/external/njs_webcrypto_module.c	Wed Jan 04 20:39:21 2023 -0800
+++ b/external/njs_webcrypto_module.c	Thu Jan 05 22:05:03 2023 -0800
@@ -3212,6 +3212,8 @@ njs_ext_import_key(njs_vm_t *vm, njs_val
     njs_webcrypto_key_format_t  fmt;
 
     pkey = NULL;
+    key_data.start = NULL;
+    key_data.length = 0;
 
     fmt = njs_key_format(vm, njs_arg(args, nargs, 1));
     if (njs_slow_path(fmt == NJS_KEY_FORMAT_UNKNOWN)) {
@@ -3266,11 +3268,9 @@ njs_ext_import_key(njs_vm_t *vm, njs_val
      *  key->hash = NJS_HASH_UNSET;
      */
 
-    start = key_data.start;
-
     switch (fmt) {
     case NJS_KEY_FORMAT_PKCS8:
-        bio = njs_bio_new_mem_buf(start, key_data.length);
+        bio = njs_bio_new_mem_buf(key_data.start, key_data.length);
         if (njs_slow_path(bio == NULL)) {
             njs_webcrypto_error(vm, "BIO_new_mem_buf() failed");
             goto fail;
@@ -3299,6 +3299,7 @@ njs_ext_import_key(njs_vm_t *vm, njs_val
         break;
 
     case NJS_KEY_FORMAT_SPKI:
+        start = key_data.start;
         pkey = d2i_PUBKEY(NULL, &start, key_data.length);
         if (njs_slow_path(pkey == NULL)) {
             njs_webcrypto_error(vm, "d2i_PUBKEY() failed");