vtls: Use CURLcode for Curl_ssl_init_certinfo() return type

The return type for this function was 0 on success and 1 on error. This
was then examined by the calling functions and, in most cases, used to
return CURLE_OUT_OF_MEMORY.

Instead use CURLcode for the return type and return the out of memory
error directly, propagating it up the call stack.

4 files changed, 17 insertions, 13 deletions

diff --git a/lib/vtls/gskit.c b/lib/vtls/gskit.c
index 87086de30..0d133107b 100644
--- a/lib/vtls/gskit.c
+++ b/lib/vtls/gskit.c
@@ -855,8 +855,10 @@ static CURLcode gskit_connect_step3(struct connectdata *conn, int sockindex)
      However the server certificate may be available, thus we can return
      info about it. */
   if(data->set.ssl.certinfo) {
-    if(Curl_ssl_init_certinfo(data, 1))
-      return CURLE_OUT_OF_MEMORY;
+    result = Curl_ssl_init_certinfo(data, 1);
+    if(result)
+      return result;
+
     if(cert) {
       result = Curl_extract_certinfo(conn, 0, cert, certend);
       if(result)
diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c
index f0127a27e..a41447a5b 100644
--- a/lib/vtls/openssl.c
+++ b/lib/vtls/openssl.c
@@ -2241,6 +2241,7 @@ static CURLcode get_cert_chain(struct connectdata *conn,
                                struct ssl_connect_data *connssl)
 
 {
+  CURLcode result;
   STACK_OF(X509) *sk;
   int i;
   char *bufp;
@@ -2258,9 +2259,11 @@ static CURLcode get_cert_chain(struct connectdata *conn,
   }
 
   numcerts = sk_X509_num(sk);
-  if(Curl_ssl_init_certinfo(data, numcerts)) {
+
+  result = Curl_ssl_init_certinfo(data, numcerts);
+  if(result) {
     free(bufp);
-    return CURLE_OUT_OF_MEMORY;
+    return result;
   }
 
   infof(data, "--- Certificate chain\n");
diff --git a/lib/vtls/vtls.c b/lib/vtls/vtls.c
index 905ddd3e9..165f49b8b 100644
--- a/lib/vtls/vtls.c
+++ b/lib/vtls/vtls.c
@@ -605,22 +605,21 @@ void Curl_ssl_free_certinfo(struct SessionHandle *data)
   }
 }
 
-int Curl_ssl_init_certinfo(struct SessionHandle * data,
-                           int num)
+CURLcode Curl_ssl_init_certinfo(struct SessionHandle *data, int num)
 {
-  struct curl_certinfo * ci = &data->info.certs;
-  struct curl_slist * * table;
+  struct curl_certinfo *ci = &data->info.certs;
+  struct curl_slist **table;
 
-  /* Initialize the certificate information structures. Return 0 if OK, else 1.
-   */
+  /* Initialize the certificate information structures */
   Curl_ssl_free_certinfo(data);
   ci->num_of_certs = num;
   table = calloc((size_t) num, sizeof(struct curl_slist *));
   if(!table)
-    return 1;
+    return CURLE_OUT_OF_MEMORY;
 
   ci->certinfo = table;
-  return 0;
+
+  return CURLE_OK;
 }
 
 /*
diff --git a/lib/vtls/vtls.h b/lib/vtls/vtls.h
index 8091868c8..19ef1cd6e 100644
--- a/lib/vtls/vtls.h
+++ b/lib/vtls/vtls.h
@@ -82,7 +82,7 @@ int Curl_ssl_check_cxn(struct connectdata *conn);
 /* Certificate information list handling. */
 
 void Curl_ssl_free_certinfo(struct SessionHandle *data);
-int Curl_ssl_init_certinfo(struct SessionHandle * data, int num);
+CURLcode Curl_ssl_init_certinfo(struct SessionHandle * data, int num);
 CURLcode Curl_ssl_push_certinfo_len(struct SessionHandle * data, int certnum,
                                     const char * label, const char * value,
                                     size_t valuelen);