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-rw-r--r--lib/http_negotiate_sspi.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/lib/http_negotiate_sspi.c b/lib/http_negotiate_sspi.c
index 3c5680c4f..8e6391495 100644
--- a/lib/http_negotiate_sspi.c
+++ b/lib/http_negotiate_sspi.c
@@ -117,9 +117,14 @@ int Curl_input_negotiate(struct connectdata *conn, bool proxy,
len = strlen(header);
if(!len) {
- /* first call in a new negotation, we have to acquire credentials,
- and allocate memory for the context */
+ /* Is this the first call in a new negotiation? */
+ if(neg_ctx->context) {
+ /* The server rejected our authentication and hasn't suppled any more
+ negotiation mechanisms */
+ return -1;
+ }
+ /* We have to acquire credentials and allocate memory for the context */
neg_ctx->credentials = malloc(sizeof(CredHandle));
neg_ctx->context = malloc(sizeof(CtxtHandle));