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sasl_sspi: Allow DIGEST-MD5 to use current windows credentials

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Fixed the ability to use the current log-in credentials with DIGEST-MD5.
I had previously disabled this functionality in commit 607883f13c as I
couldn't get this to work under Windows 8, however, from testing HTTP
Digest authentication through Windows SSPI and then further testing of
this code I have found it works in Windows 7.

Some further investigation is required to see what the differences are
between Windows 7 and 8, but for now enable this functionality as the
code will return an error when AcquireCredentialsHandle() fails.
This commit is contained in:
Steve Holme
2014-10-29 14:05:21 +00:00
parent 276741af4d
commit f7e24683c4
2 changed files with 23 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
lib/curl_sasl_sspi.c
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@@ -128,6 +128,7 @@ CURLcode Curl_sasl_create_digest_md5_message(struct SessionHandle *data,
CtxtHandle ctx;
PSecPkgInfo SecurityPackage;
SEC_WINNT_AUTH_IDENTITY identity;
SEC_WINNT_AUTH_IDENTITY *p_identity;
SecBuffer chlg_buf;
SecBuffer resp_buf;
SecBufferDesc chlg_desc;
@@ -147,13 +148,6 @@ CURLcode Curl_sasl_create_digest_md5_message(struct SessionHandle *data,
if(!chlg)
return CURLE_BAD_CONTENT_ENCODING;
/* Ensure we have some login credentials as DigestSSP cannot use the current
Windows user like NTLMSSP can */
if(!userp || !*userp) {
Curl_safefree(chlg);
return CURLE_LOGIN_DENIED;
}
/* Query the security package for DigestSSP */
status = s_pSecFn->QuerySecurityPackageInfo((TCHAR *) TEXT("WDigest"),
&SecurityPackage);
@@ -185,25 +179,33 @@ CURLcode Curl_sasl_create_digest_md5_message(struct SessionHandle *data,
return CURLE_OUT_OF_MEMORY;
}
/* Populate our identity structure */
result = Curl_create_sspi_identity(userp, passwdp, &identity);
if(result) {
Curl_safefree(spn);
Curl_safefree(resp);
Curl_safefree(chlg);
if(userp && *userp) {
/* Populate our identity structure */
result = Curl_create_sspi_identity(userp, passwdp, &identity);
if(result) {
Curl_safefree(spn);
Curl_safefree(resp);
Curl_safefree(chlg);
return result;
return result;
}
/* 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("WDigest"),
SECPKG_CRED_OUTBOUND, NULL,
&identity, NULL, NULL,
p_identity, NULL, NULL,
&handle, &expiry);
if(status != SEC_E_OK) {
Curl_sspi_free_identity(&identity);
Curl_sspi_free_identity(p_identity);
Curl_safefree(spn);
Curl_safefree(resp);
Curl_safefree(chlg);
@@ -237,7 +239,7 @@ CURLcode Curl_sasl_create_digest_md5_message(struct SessionHandle *data,
s_pSecFn->CompleteAuthToken(&handle, &resp_desc);
else if(status != SEC_E_OK && status != SEC_I_CONTINUE_NEEDED) {
s_pSecFn->FreeCredentialsHandle(&handle);
Curl_sspi_free_identity(&identity);
Curl_sspi_free_identity(p_identity);
Curl_safefree(spn);
Curl_safefree(resp);
Curl_safefree(chlg);
@@ -254,7 +256,7 @@ CURLcode Curl_sasl_create_digest_md5_message(struct SessionHandle *data,
s_pSecFn->FreeCredentialsHandle(&handle);
/* Free the identity structure */
Curl_sspi_free_identity(&identity);
Curl_sspi_free_identity(p_identity);
/* Free the SPN */
Curl_safefree(spn);