Merge branch 'upstream-curl' into update-curl

* upstream-curl:
  curl 2017-04-19 (d957e218)

Resolve conflicts in `CMakeLists.txt` in favor of the upstream version.
We will re-apply our logic as needed in following commits.

7 files changed, 205 insertions, 128 deletions

diff --git a/Utilities/cmcurl/lib/vauth/digest.c b/Utilities/cmcurl/lib/vauth/digest.c
index 7d9200a..31d25cf 100644
--- a/Utilities/cmcurl/lib/vauth/digest.c
+++ b/Utilities/cmcurl/lib/vauth/digest.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -237,7 +237,7 @@ static CURLcode auth_digest_get_qop_values(const char *options, int *value)
  * auth_decode_digest_md5_message()
  *
  * This is used internally to decode an already encoded DIGEST-MD5 challenge
- * message into the seperate attributes.
+ * message into the separate attributes.
  *
  * Parameters:
  *
@@ -366,7 +366,7 @@ CURLcode Curl_auth_create_digest_md5_message(struct Curl_easy *data,
   char qop[]        = DIGEST_QOP_VALUE_STRING_AUTH;
   char *spn         = NULL;
 
-  /* Decode the challange message */
+  /* Decode the challenge message */
   result = auth_decode_digest_md5_message(chlg64, nonce, sizeof(nonce),
                                           realm, sizeof(realm),
                                           algorithm, sizeof(algorithm),
@@ -502,7 +502,7 @@ CURLcode Curl_auth_create_digest_md5_message(struct Curl_easy *data,
 /*
  * Curl_auth_decode_digest_http_message()
  *
- * This is used to decode a HTTP DIGEST challenge message into the seperate
+ * This is used to decode a HTTP DIGEST challenge message into the separate
  * attributes.
  *
  * Parameters:
diff --git a/Utilities/cmcurl/lib/vauth/digest_sspi.c b/Utilities/cmcurl/lib/vauth/digest_sspi.c
index b9ceb12..0bd9444 100644
--- a/Utilities/cmcurl/lib/vauth/digest_sspi.c
+++ b/Utilities/cmcurl/lib/vauth/digest_sspi.c
@@ -6,7 +6,7 @@
  *                             \___|\___/|_| \_\_____|
  *
  * Copyright (C) 2014 - 2016, Steve Holme, <steve_holme@hotmail.com>.
- * Copyright (C) 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 2015 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -320,7 +320,7 @@ CURLcode Curl_override_sspi_http_realm(const char *chlg,
 /*
  * Curl_auth_decode_digest_http_message()
  *
- * This is used to decode a HTTP DIGEST challenge message into the seperate
+ * This is used to decode a HTTP DIGEST challenge message into the separate
  * attributes.
  *
  * Parameters:
@@ -335,13 +335,44 @@ CURLcode Curl_auth_decode_digest_http_message(const char *chlg,
 {
   size_t chlglen = strlen(chlg);
 
-  /* We had an input token before and we got another one now. This means we
-     provided bad credentials in the previous request. */
-  if(digest->input_token)
-    return CURLE_BAD_CONTENT_ENCODING;
+  /* We had an input token before so if there's another one now that means we
+     provided bad credentials in the previous request or it's stale. */
+  if(digest->input_token) {
+    bool stale = false;
+    const char *p = chlg;
+
+    /* Check for the 'stale' directive */
+    for(;;) {
+      char value[DIGEST_MAX_VALUE_LENGTH];
+      char content[DIGEST_MAX_CONTENT_LENGTH];
+
+      while(*p && ISSPACE(*p))
+        p++;
+
+      if(!Curl_auth_digest_get_pair(p, value, content, &p))
+        break;
+
+      if(Curl_strcasecompare(value, "stale")
+         && Curl_strcasecompare(content, "true")) {
+        stale = true;
+        break;
+      }
+
+      while(*p && ISSPACE(*p))
+        p++;
+
+      if(',' == *p)
+        p++;
+    }
+
+    if(stale)
+      Curl_auth_digest_cleanup(digest);
+    else
+      return CURLE_LOGIN_DENIED;
+  }
 
-  /* Simply store the challenge for use later */
-  digest->input_token = (BYTE *) Curl_memdup(chlg, chlglen);
+  /* Store the challenge for use later */
+  digest->input_token = (BYTE *) Curl_memdup(chlg, chlglen + 1);
   if(!digest->input_token)
     return CURLE_OUT_OF_MEMORY;
 
@@ -379,21 +410,13 @@ CURLcode Curl_auth_create_digest_http_message(struct Curl_easy *data,
                                               char **outptr, size_t *outlen)
 {
   size_t token_max;
-  CredHandle credentials;
-  CtxtHandle context;
   char *resp;
   BYTE *output_token;
+  size_t output_token_len = 0;
   PSecPkgInfo SecurityPackage;
-  SEC_WINNT_AUTH_IDENTITY identity;
-  SEC_WINNT_AUTH_IDENTITY *p_identity;
-  SecBuffer chlg_buf[3];
-  SecBuffer resp_buf;
+  SecBuffer chlg_buf[5];
   SecBufferDesc chlg_desc;
-  SecBufferDesc resp_desc;
   SECURITY_STATUS status;
-  unsigned long attrs;
-  TimeStamp expiry; /* For Windows 9x compatibility of SSPI calls */
-  TCHAR *spn;
 
   (void) data;
 
@@ -408,123 +431,168 @@ CURLcode Curl_auth_create_digest_http_message(struct Curl_easy *data,
   /* Release the package buffer as it is not required anymore */
   s_pSecFn->FreeContextBuffer(SecurityPackage);
 
-  if(userp && *userp) {
-    /* Populate our identity structure */
-    if(Curl_create_sspi_identity(userp, passwdp, &identity))
-      return CURLE_OUT_OF_MEMORY;
-
-    /* Populate our identity domain */
-    if(Curl_override_sspi_http_realm((const char *) digest->input_token,
-                                     &identity))
-      return CURLE_OUT_OF_MEMORY;
+  /* Allocate the output buffer according to the max token size as indicated
+     by the security package */
+  output_token = malloc(token_max);
+  if(!output_token) {
+    return CURLE_OUT_OF_MEMORY;
+  }
 
-    /* Allow proper cleanup of the identity structure */
-    p_identity = &identity;
+  if(digest->http_context) {
+    chlg_desc.ulVersion    = SECBUFFER_VERSION;
+    chlg_desc.cBuffers     = 5;
+    chlg_desc.pBuffers     = chlg_buf;
+    chlg_buf[0].BufferType = SECBUFFER_TOKEN;
+    chlg_buf[0].pvBuffer   = NULL;
+    chlg_buf[0].cbBuffer   = 0;
+    chlg_buf[1].BufferType = SECBUFFER_PKG_PARAMS;
+    chlg_buf[1].pvBuffer   = (void *) request;
+    chlg_buf[1].cbBuffer   = curlx_uztoul(strlen((const char *) request));
+    chlg_buf[2].BufferType = SECBUFFER_PKG_PARAMS;
+    chlg_buf[2].pvBuffer   = (void *) uripath;
+    chlg_buf[2].cbBuffer   = curlx_uztoul(strlen((const char *) uripath));
+    chlg_buf[3].BufferType = SECBUFFER_PKG_PARAMS;
+    chlg_buf[3].pvBuffer   = NULL;
+    chlg_buf[3].cbBuffer   = 0;
+    chlg_buf[4].BufferType = SECBUFFER_PADDING;
+    chlg_buf[4].pvBuffer   = output_token;
+    chlg_buf[4].cbBuffer   = curlx_uztoul(token_max);
+
+    status = s_pSecFn->MakeSignature(digest->http_context, 0, &chlg_desc, 0);
+    if(status == SEC_E_OK)
+      output_token_len = chlg_buf[4].cbBuffer;
+    else { /* delete the context so a new one can be made */
+      infof(data, "digest_sspi: MakeSignature failed, error 0x%08lx\n",
+            (long)status);
+      s_pSecFn->DeleteSecurityContext(digest->http_context);
+      Curl_safefree(digest->http_context);
+    }
   }
-  else
-    /* Use the current Windows user */
-    p_identity = NULL;
 
-  /* Acquire our credentials handle */
-  status = s_pSecFn->AcquireCredentialsHandle(NULL,
-                                              (TCHAR *) TEXT(SP_NAME_DIGEST),
-                                              SECPKG_CRED_OUTBOUND, NULL,
-                                              p_identity, NULL, NULL,
-                                              &credentials, &expiry);
-  if(status != SEC_E_OK) {
-    Curl_sspi_free_identity(p_identity);
+  if(!digest->http_context) {
+    CredHandle credentials;
+    SEC_WINNT_AUTH_IDENTITY identity;
+    SEC_WINNT_AUTH_IDENTITY *p_identity;
+    SecBuffer resp_buf;
+    SecBufferDesc resp_desc;
+    unsigned long attrs;
+    TimeStamp expiry; /* For Windows 9x compatibility of SSPI calls */
+    TCHAR *spn;
+
+    if(userp && *userp) {
+      /* Populate our identity structure */
+      if(Curl_create_sspi_identity(userp, passwdp, &identity)) {
+        free(output_token);
+        return CURLE_OUT_OF_MEMORY;
+      }
 
-    return CURLE_LOGIN_DENIED;
-  }
+      /* Populate our identity domain */
+      if(Curl_override_sspi_http_realm((const char *) digest->input_token,
+                                       &identity)) {
+        free(output_token);
+        return CURLE_OUT_OF_MEMORY;
+      }
 
-  /* Allocate the output buffer according to the max token size as indicated
-     by the security package */
-  output_token = malloc(token_max);
-  if(!output_token) {
-    s_pSecFn->FreeCredentialsHandle(&credentials);
+      /* Allow proper cleanup of the identity structure */
+      p_identity = &identity;
+    }
+    else
+      /* Use the current Windows user */
+      p_identity = NULL;
+
+    /* Acquire our credentials handle */
+    status = s_pSecFn->AcquireCredentialsHandle(NULL,
+                                                (TCHAR *) TEXT(SP_NAME_DIGEST),
+                                                SECPKG_CRED_OUTBOUND, NULL,
+                                                p_identity, NULL, NULL,
+                                                &credentials, &expiry);
+    if(status != SEC_E_OK) {
+      Curl_sspi_free_identity(p_identity);
+      free(output_token);
 
-    Curl_sspi_free_identity(p_identity);
+      return CURLE_LOGIN_DENIED;
+    }
 
-    return CURLE_OUT_OF_MEMORY;
-  }
+    /* Setup the challenge "input" security buffer if present */
+    chlg_desc.ulVersion    = SECBUFFER_VERSION;
+    chlg_desc.cBuffers     = 3;
+    chlg_desc.pBuffers     = chlg_buf;
+    chlg_buf[0].BufferType = SECBUFFER_TOKEN;
+    chlg_buf[0].pvBuffer   = digest->input_token;
+    chlg_buf[0].cbBuffer   = curlx_uztoul(digest->input_token_len);
+    chlg_buf[1].BufferType = SECBUFFER_PKG_PARAMS;
+    chlg_buf[1].pvBuffer   = (void *) request;
+    chlg_buf[1].cbBuffer   = curlx_uztoul(strlen((const char *) request));
+    chlg_buf[2].BufferType = SECBUFFER_PKG_PARAMS;
+    chlg_buf[2].pvBuffer   = NULL;
+    chlg_buf[2].cbBuffer   = 0;
+
+    /* Setup the response "output" security buffer */
+    resp_desc.ulVersion = SECBUFFER_VERSION;
+    resp_desc.cBuffers  = 1;
+    resp_desc.pBuffers  = &resp_buf;
+    resp_buf.BufferType = SECBUFFER_TOKEN;
+    resp_buf.pvBuffer   = output_token;
+    resp_buf.cbBuffer   = curlx_uztoul(token_max);
+
+    spn = Curl_convert_UTF8_to_tchar((char *) uripath);
+    if(!spn) {
+      s_pSecFn->FreeCredentialsHandle(&credentials);
+
+      Curl_sspi_free_identity(p_identity);
+      free(output_token);
 
-  /* Setup the challenge "input" security buffer if present */
-  chlg_desc.ulVersion    = SECBUFFER_VERSION;
-  chlg_desc.cBuffers     = 3;
-  chlg_desc.pBuffers     = chlg_buf;
-  chlg_buf[0].BufferType = SECBUFFER_TOKEN;
-  chlg_buf[0].pvBuffer   = digest->input_token;
-  chlg_buf[0].cbBuffer   = curlx_uztoul(digest->input_token_len);
-  chlg_buf[1].BufferType = SECBUFFER_PKG_PARAMS;
-  chlg_buf[1].pvBuffer   = (void *) request;
-  chlg_buf[1].cbBuffer   = curlx_uztoul(strlen((const char *) request));
-  chlg_buf[2].BufferType = SECBUFFER_PKG_PARAMS;
-  chlg_buf[2].pvBuffer   = NULL;
-  chlg_buf[2].cbBuffer   = 0;
+      return CURLE_OUT_OF_MEMORY;
+    }
 
-  /* Setup the response "output" security buffer */
-  resp_desc.ulVersion = SECBUFFER_VERSION;
-  resp_desc.cBuffers  = 1;
-  resp_desc.pBuffers  = &resp_buf;
-  resp_buf.BufferType = SECBUFFER_TOKEN;
-  resp_buf.pvBuffer   = output_token;
-  resp_buf.cbBuffer   = curlx_uztoul(token_max);
+    /* Allocate our new context handle */
+    digest->http_context = calloc(1, sizeof(CtxtHandle));
+    if(!digest->http_context)
+      return CURLE_OUT_OF_MEMORY;
 
-  spn = Curl_convert_UTF8_to_tchar((char *) uripath);
-  if(!spn) {
-    s_pSecFn->FreeCredentialsHandle(&credentials);
+    /* Generate our response message */
+    status = s_pSecFn->InitializeSecurityContext(&credentials, NULL,
+                                                 spn,
+                                                 ISC_REQ_USE_HTTP_STYLE, 0, 0,
+                                                 &chlg_desc, 0,
+                                                 digest->http_context,
+                                                 &resp_desc, &attrs, &expiry);
+    Curl_unicodefree(spn);
+
+    if(status == SEC_I_COMPLETE_NEEDED ||
+       status == SEC_I_COMPLETE_AND_CONTINUE)
+      s_pSecFn->CompleteAuthToken(&credentials, &resp_desc);
+    else if(status != SEC_E_OK && status != SEC_I_CONTINUE_NEEDED) {
+      s_pSecFn->FreeCredentialsHandle(&credentials);
+
+      Curl_sspi_free_identity(p_identity);
+      free(output_token);
 
-    Curl_sspi_free_identity(p_identity);
-    free(output_token);
+      Curl_safefree(digest->http_context);
 
-    return CURLE_OUT_OF_MEMORY;
-  }
+      return CURLE_OUT_OF_MEMORY;
+    }
 
-  /* Generate our reponse message */
-  status = s_pSecFn->InitializeSecurityContext(&credentials, NULL,
-                                               spn,
-                                               ISC_REQ_USE_HTTP_STYLE, 0, 0,
-                                               &chlg_desc, 0, &context,
-                                               &resp_desc, &attrs, &expiry);
-  Curl_unicodefree(spn);
+    output_token_len = resp_buf.cbBuffer;
 
-  if(status == SEC_I_COMPLETE_NEEDED ||
-     status == SEC_I_COMPLETE_AND_CONTINUE)
-    s_pSecFn->CompleteAuthToken(&credentials, &resp_desc);
-  else if(status != SEC_E_OK && status != SEC_I_CONTINUE_NEEDED) {
     s_pSecFn->FreeCredentialsHandle(&credentials);
-
     Curl_sspi_free_identity(p_identity);
-    free(output_token);
-
-    return CURLE_OUT_OF_MEMORY;
   }
 
-  resp = malloc(resp_buf.cbBuffer + 1);
+  resp = malloc(output_token_len + 1);
   if(!resp) {
-    s_pSecFn->DeleteSecurityContext(&context);
-    s_pSecFn->FreeCredentialsHandle(&credentials);
-
-    Curl_sspi_free_identity(p_identity);
     free(output_token);
 
     return CURLE_OUT_OF_MEMORY;
   }
 
-  /* Copy the generated reponse */
-  memcpy(resp, resp_buf.pvBuffer, resp_buf.cbBuffer);
-  resp[resp_buf.cbBuffer] = 0x00;
+  /* Copy the generated response */
+  memcpy(resp, output_token, output_token_len);
+  resp[output_token_len] = 0;
 
   /* Return the response */
   *outptr = resp;
-  *outlen = resp_buf.cbBuffer;
-
-  /* Free our handles */
-  s_pSecFn->DeleteSecurityContext(&context);
-  s_pSecFn->FreeCredentialsHandle(&credentials);
-
-  /* Free the identity structure */
-  Curl_sspi_free_identity(p_identity);
+  *outlen = output_token_len;
 
   /* Free the response buffer */
   free(output_token);
@@ -549,6 +617,12 @@ void Curl_auth_digest_cleanup(struct digestdata *digest)
 
   /* Reset any variables */
   digest->input_token_len = 0;
+
+  /* Delete security context */
+  if(digest->http_context) {
+    s_pSecFn->DeleteSecurityContext(digest->http_context);
+    Curl_safefree(digest->http_context);
+  }
 }
 
 #endif /* USE_WINDOWS_SSPI && !CURL_DISABLE_CRYPTO_AUTH */
diff --git a/Utilities/cmcurl/lib/vauth/krb5_gssapi.c b/Utilities/cmcurl/lib/vauth/krb5_gssapi.c
index c754fae..560ecc5 100644
--- a/Utilities/cmcurl/lib/vauth/krb5_gssapi.c
+++ b/Utilities/cmcurl/lib/vauth/krb5_gssapi.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 2014 - 2016, Steve Holme, <steve_holme@hotmail.com>.
+ * Copyright (C) 2014 - 2017, Steve Holme, <steve_holme@hotmail.com>.
  * Copyright (C) 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
@@ -68,7 +68,7 @@ bool Curl_auth_is_gssapi_supported(void)
  * passdwp     [in]     - The user's password.
  * service     [in]     - The service type such as http, smtp, pop or imap.
  * host        [in[     - The host name.
- * mutual_auth [in]     - Flag specifing whether or not mutual authentication
+ * mutual_auth [in]     - Flag specifying whether or not mutual authentication
  *                        is enabled.
  * chlg64      [in]     - Pointer to the optional base64 encoded challenge
  *                        message.
diff --git a/Utilities/cmcurl/lib/vauth/krb5_sspi.c b/Utilities/cmcurl/lib/vauth/krb5_sspi.c
index 151794e..1b4cef4 100644
--- a/Utilities/cmcurl/lib/vauth/krb5_sspi.c
+++ b/Utilities/cmcurl/lib/vauth/krb5_sspi.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 2014 - 2016, Steve Holme, <steve_holme@hotmail.com>.
+ * Copyright (C) 2014 - 2017, Steve Holme, <steve_holme@hotmail.com>.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -74,7 +74,7 @@ bool Curl_auth_is_gssapi_supported(void)
  * passdwp     [in]     - The user's password.
  * service     [in]     - The service type such as http, smtp, pop or imap.
  * host        [in]     - The host name.
- * mutual_auth [in]     - Flag specifing whether or not mutual authentication
+ * mutual_auth [in]     - Flag specifying whether or not mutual authentication
  *                        is enabled.
  * chlg64      [in]     - The optional base64 encoded challenge message.
  * krb5        [in/out] - The Kerberos 5 data struct being used and modified.
diff --git a/Utilities/cmcurl/lib/vauth/ntlm.c b/Utilities/cmcurl/lib/vauth/ntlm.c
index b4d345d..d02eec4 100644
--- a/Utilities/cmcurl/lib/vauth/ntlm.c
+++ b/Utilities/cmcurl/lib/vauth/ntlm.c
@@ -27,7 +27,7 @@
 /*
  * NTLM details:
  *
- * http://davenport.sourceforge.net/ntlm.html
+ * https://davenport.sourceforge.io/ntlm.html
  * https://www.innovation.ch/java/ntlm.html
  */
 
@@ -394,7 +394,7 @@ CURLcode Curl_auth_create_ntlm_type1_message(const char *userp,
   /* Clean up any former leftovers and initialise to defaults */
   Curl_auth_ntlm_cleanup(ntlm);
 
-#if USE_NTRESPONSES && USE_NTLM2SESSION
+#if defined(USE_NTRESPONSES) && defined(USE_NTLM2SESSION)
 #define NTLM2FLAG NTLMFLAG_NEGOTIATE_NTLM2_KEY
 #else
 #define NTLM2FLAG 0
@@ -509,7 +509,7 @@ CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
   unsigned char ntlmbuf[NTLM_BUFSIZE];
   int lmrespoff;
   unsigned char lmresp[24]; /* fixed-size */
-#if USE_NTRESPONSES
+#ifdef USE_NTRESPONSES
   int ntrespoff;
   unsigned int ntresplen = 24;
   unsigned char ntresp[24]; /* fixed-size */
@@ -552,7 +552,7 @@ CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
     hostlen = strlen(host);
   }
 
-#if USE_NTRESPONSES && USE_NTLM_V2
+#if defined(USE_NTRESPONSES) && defined(USE_NTLM_V2)
   if(ntlm->target_info_len) {
     unsigned char ntbuffer[0x18];
     unsigned int entropy[2];
@@ -590,7 +590,7 @@ CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
   else
 #endif
 
-#if USE_NTRESPONSES && USE_NTLM2SESSION
+#if defined(USE_NTRESPONSES) && defined(USE_NTLM2SESSION)
   /* We don't support NTLM2 if we don't have USE_NTRESPONSES */
   if(ntlm->flags & NTLMFLAG_NEGOTIATE_NTLM2_KEY) {
     unsigned char ntbuffer[0x18];
@@ -630,12 +630,12 @@ CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
 #endif
   {
 
-#if USE_NTRESPONSES
+#ifdef USE_NTRESPONSES
     unsigned char ntbuffer[0x18];
 #endif
     unsigned char lmbuffer[0x18];
 
-#if USE_NTRESPONSES
+#ifdef USE_NTRESPONSES
     result = Curl_ntlm_core_mk_nt_hash(data, passwdp, ntbuffer);
     if(result)
       return result;
@@ -651,7 +651,7 @@ CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
 
     /* A safer but less compatible alternative is:
      *   Curl_ntlm_core_lm_resp(ntbuffer, &ntlm->nonce[0], lmresp);
-     * See http://davenport.sourceforge.net/ntlm.html#ntlmVersion2 */
+     * See https://davenport.sourceforge.io/ntlm.html#ntlmVersion2 */
   }
 
   if(unicode) {
@@ -661,7 +661,7 @@ CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
   }
 
   lmrespoff = 64; /* size of the message header */
-#if USE_NTRESPONSES
+#ifdef USE_NTRESPONSES
   ntrespoff = lmrespoff + 0x18;
   domoff = ntrespoff + ntresplen;
 #else
@@ -721,7 +721,7 @@ CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
                   SHORTPAIR(lmrespoff),
                   0x0, 0x0,
 
-#if USE_NTRESPONSES
+#ifdef USE_NTRESPONSES
                   SHORTPAIR(ntresplen),  /* NT-response length, twice */
                   SHORTPAIR(ntresplen),
                   SHORTPAIR(ntrespoff),
@@ -768,7 +768,7 @@ CURLcode Curl_auth_create_ntlm_type3_message(struct Curl_easy *data,
     ntlm_print_hex(stderr, (char *)&ntlmbuf[lmrespoff], 0x18);
   });
 
-#if USE_NTRESPONSES
+#ifdef USE_NTRESPONSES
   if(size < (NTLM_BUFSIZE - ntresplen)) {
     DEBUGASSERT(size == (size_t)ntrespoff);
     memcpy(&ntlmbuf[size], ptr_ntresp, ntresplen);
diff --git a/Utilities/cmcurl/lib/vauth/ntlm.h b/Utilities/cmcurl/lib/vauth/ntlm.h
index b14e7a5..f906a3c 100644
--- a/Utilities/cmcurl/lib/vauth/ntlm.h
+++ b/Utilities/cmcurl/lib/vauth/ntlm.h
@@ -32,7 +32,7 @@
 /* Stuff only required for curl_ntlm_msgs.c */
 #ifdef BUILDING_CURL_NTLM_MSGS_C
 
-/* Flag bits definitions based on http://davenport.sourceforge.net/ntlm.html */
+/* Flag bits definitions based on https://davenport.sourceforge.io/ntlm.html */
 
 #define NTLMFLAG_NEGOTIATE_UNICODE               (1<<0)
 /* Indicates that Unicode strings are supported for use in security buffer
diff --git a/Utilities/cmcurl/lib/vauth/spnego_sspi.c b/Utilities/cmcurl/lib/vauth/spnego_sspi.c
index 5fa95e2..a6797cd 100644
--- a/Utilities/cmcurl/lib/vauth/spnego_sspi.c
+++ b/Utilities/cmcurl/lib/vauth/spnego_sspi.c
@@ -34,6 +34,7 @@
 #include "warnless.h"
 #include "curl_multibyte.h"
 #include "sendf.h"
+#include "strerror.h"
 
 /* The last #include files should be: */
 #include "curl_memory.h"
@@ -224,6 +225,8 @@ CURLcode Curl_auth_decode_spnego_message(struct Curl_easy *data,
   free(chlg);
 
   if(GSS_ERROR(nego->status)) {
+    failf(data, "InitializeSecurityContext failed: %s",
+          Curl_sspi_strerror(data->easy_conn, nego->status));
     return CURLE_OUT_OF_MEMORY;
   }