Blame SOURCES/httpd-2.4.6-CVE-2017-3167.patch

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diff --git a/include/http_protocol.h b/include/http_protocol.h
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index 5ac0ce3..f3a5137 100644
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--- a/include/http_protocol.h
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+++ b/include/http_protocol.h
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@@ -558,7 +558,11 @@ AP_DECLARE(void) ap_note_digest_auth_failure(request_rec *r);
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 AP_DECLARE_HOOK(int, note_auth_failure, (request_rec *r, const char *auth_type))
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 /**
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- * Get the password from the request headers
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+ * Get the password from the request headers. This function has multiple side
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+ * effects due to its prior use in the old authentication framework.
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+ * ap_get_basic_auth_components() should be preferred.
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+ *
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+ * @deprecated @see ap_get_basic_auth_components
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  * @param r The current request
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  * @param pw The password as set in the headers
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  * @return 0 (OK) if it set the 'pw' argument (and assured
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@@ -571,6 +575,25 @@ AP_DECLARE_HOOK(int, note_auth_failure, (request_rec *r, const char *auth_type))
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  */
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 AP_DECLARE(int) ap_get_basic_auth_pw(request_rec *r, const char **pw);
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+#define AP_GET_BASIC_AUTH_PW_NOTE "AP_GET_BASIC_AUTH_PW_NOTE"
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+
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+/**
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+ * Get the username and/or password from the request's Basic authentication
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+ * headers. Unlike ap_get_basic_auth_pw(), calling this function has no side
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+ * effects on the passed request_rec.
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+ *
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+ * @param r The current request
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+ * @param username If not NULL, set to the username sent by the client
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+ * @param password If not NULL, set to the password sent by the client
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+ * @return APR_SUCCESS if the credentials were successfully parsed and returned;
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+ *         APR_EINVAL if there was no authentication header sent or if the
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+ *         client was not using the Basic authentication scheme. username and
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+ *         password are unchanged on failure.
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+ */
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+AP_DECLARE(apr_status_t) ap_get_basic_auth_components(const request_rec *r,
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+                                                      const char **username,
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+                                                      const char **password);
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+
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 /**
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  * parse_uri: break apart the uri
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  * @warning Side Effects:
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diff --git a/include/httpd.h b/include/httpd.h
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index 652a212..176ef5e 100644
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--- a/include/httpd.h
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+++ b/include/httpd.h
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@@ -2272,6 +2272,34 @@ AP_DECLARE(char *) ap_get_exec_line(apr_pool_t *p,
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 #define AP_NORESTART APR_OS_START_USEERR + 1
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+/**
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+ * Perform a case-insensitive comparison of two strings @a atr1 and @a atr2,
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+ * treating upper and lower case values of the 26 standard C/POSIX alphabetic
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+ * characters as equivalent. Extended latin characters outside of this set
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+ * are treated as unique octets, irrespective of the current locale.
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+ *
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+ * Returns in integer greater than, equal to, or less than 0,
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+ * according to whether @a str1 is considered greater than, equal to,
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+ * or less than @a str2.
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+ *
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+ * @note Same code as apr_cstr_casecmp, which arrives in APR 1.6
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+ */
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+AP_DECLARE(int) ap_cstr_casecmp(const char *s1, const char *s2);
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+
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+/**
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+ * Perform a case-insensitive comparison of two strings @a atr1 and @a atr2,
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+ * treating upper and lower case values of the 26 standard C/POSIX alphabetic
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+ * characters as equivalent. Extended latin characters outside of this set
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+ * are treated as unique octets, irrespective of the current locale.
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+ *
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+ * Returns in integer greater than, equal to, or less than 0,
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+ * according to whether @a str1 is considered greater than, equal to,
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+ * or less than @a str2.
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+ *
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+ * @note Same code as apr_cstr_casecmpn, which arrives in APR 1.6
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+ */
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+AP_DECLARE(int) ap_cstr_casecmpn(const char *s1, const char *s2, apr_size_t n);
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+
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 #ifdef __cplusplus
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 }
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 #endif
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diff --git a/server/protocol.c b/server/protocol.c
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index 24355c7..868c3e3 100644
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--- a/server/protocol.c
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+++ b/server/protocol.c
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@@ -1567,6 +1567,7 @@ AP_DECLARE(int) ap_get_basic_auth_pw(request_rec *r, const char **pw)
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     t = ap_pbase64decode(r->pool, auth_line);
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     r->user = ap_getword_nulls (r->pool, &t, ':');
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+    apr_table_setn(r->notes, AP_GET_BASIC_AUTH_PW_NOTE, "1");
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     r->ap_auth_type = "Basic";
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     *pw = t;
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@@ -1574,6 +1575,53 @@ AP_DECLARE(int) ap_get_basic_auth_pw(request_rec *r, const char **pw)
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     return OK;
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 }
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+AP_DECLARE(apr_status_t) ap_get_basic_auth_components(const request_rec *r,
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+                                                      const char **username,
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+                                                      const char **password)
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+{
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+    const char *auth_header;
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+    const char *credentials;
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+    const char *decoded;
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+    const char *user;
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+
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+    auth_header = (PROXYREQ_PROXY == r->proxyreq) ? "Proxy-Authorization"
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+                                                  : "Authorization";
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+    credentials = apr_table_get(r->headers_in, auth_header);
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+
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+    if (!credentials) {
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+        /* No auth header. */
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+        return APR_EINVAL;
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+    }
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+
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+    if (ap_cstr_casecmp(ap_getword(r->pool, &credentials, ' '), "Basic")) {
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+        /* These aren't Basic credentials. */
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+        return APR_EINVAL;
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+    }
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+
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+    while (*credentials == ' ' || *credentials == '\t') {
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+        credentials++;
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+    }
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+
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+    /* XXX Our base64 decoding functions don't actually error out if the string
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+     * we give it isn't base64; they'll just silently stop and hand us whatever
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+     * they've parsed up to that point.
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+     *
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+     * Since this function is supposed to be a drop-in replacement for the
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+     * deprecated ap_get_basic_auth_pw(), don't fix this for 2.4.x.
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+     */
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+    decoded = ap_pbase64decode(r->pool, credentials);
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+    user = ap_getword_nulls(r->pool, &decoded, ':');
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+
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+    if (username) {
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+        *username = user;
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+    }
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+    if (password) {
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+        *password = decoded;
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+    }
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+
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+    return APR_SUCCESS;
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+}
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+
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 struct content_length_ctx {
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     int data_sent;  /* true if the C-L filter has already sent at
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                      * least one bucket on to the next output filter
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diff --git a/server/request.c b/server/request.c
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index 2711bed..4eef097 100644
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--- a/server/request.c
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+++ b/server/request.c
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@@ -124,6 +124,8 @@ static int decl_die(int status, const char *phase, request_rec *r)
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 AP_DECLARE(int) ap_some_authn_required(request_rec *r)
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 {
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     int access_status;
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+    char *olduser = r->user;
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+    int rv = FALSE;
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     switch (ap_satisfies(r)) {
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     case SATISFY_ALL:
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@@ -134,7 +136,7 @@ AP_DECLARE(int) ap_some_authn_required(request_rec *r)
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         access_status = ap_run_access_checker_ex(r);
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         if (access_status == DECLINED) {
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-            return TRUE;
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+            rv = TRUE;
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         }
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         break;
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@@ -145,13 +147,14 @@ AP_DECLARE(int) ap_some_authn_required(request_rec *r)
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         access_status = ap_run_access_checker_ex(r);
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         if (access_status == DECLINED) {
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-            return TRUE;
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+            rv = TRUE;
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         }
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         break;
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     }
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-    return FALSE;
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+    r->user = olduser;
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+    return rv;
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 }
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 /* This is the master logic for processing requests.  Do NOT duplicate
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@@ -259,6 +262,14 @@ AP_DECLARE(int) ap_process_request_internal(request_rec *r)
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         r->ap_auth_type = r->main->ap_auth_type;
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     }
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     else {
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+        /* A module using a confusing API (ap_get_basic_auth_pw) caused
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+        ** r->user to be filled out prior to check_authn hook. We treat
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+        ** it is inadvertent.
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+        */
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+        if (r->user && apr_table_get(r->notes, AP_GET_BASIC_AUTH_PW_NOTE)) { 
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+            r->user = NULL;
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+        }
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+
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         switch (ap_satisfies(r)) {
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         case SATISFY_ALL:
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         case SATISFY_NOSPEC:
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diff --git a/server/util.c b/server/util.c
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index db22b50..70fd662 100644
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--- a/server/util.c
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+++ b/server/util.c
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@@ -96,7 +96,6 @@
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 #undef APLOG_MODULE_INDEX
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 #define APLOG_MODULE_INDEX AP_CORE_MODULE_INDEX
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-
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 /*
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  * Examine a field value (such as a media-/content-type) string and return
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  * it sans any parameters; e.g., strip off any ';charset=foo' and the like.
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@@ -3036,3 +3035,128 @@ AP_DECLARE(char *) ap_get_exec_line(apr_pool_t *p,
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     return apr_pstrndup(p, buf, k);
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 }
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+
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+#if !APR_CHARSET_EBCDIC
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+/*
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+ * Our own known-fast translation table for casecmp by character.
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+ * Only ASCII alpha characters 41-5A are folded to 61-7A, other
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+ * octets (such as extended latin alphabetics) are never case-folded.
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+ * NOTE: Other than Alpha A-Z/a-z, each code point is unique!
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+*/
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+static const short ucharmap[] = {
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+    0x0,  0x1,  0x2,  0x3,  0x4,  0x5,  0x6,  0x7,
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+    0x8,  0x9,  0xa,  0xb,  0xc,  0xd,  0xe,  0xf,
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+    0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
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+    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
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+    0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
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+    0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
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+    0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
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+    0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
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+    0x40,  'a',  'b',  'c',  'd',  'e',  'f',  'g',
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+     'h',  'i',  'j',  'k',  'l',  'm',  'n',  'o',
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+     'p',  'q',  'r',  's',  't',  'u',  'v',  'w',
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+     'x',  'y',  'z', 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
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+    0x60,  'a',  'b',  'c',  'd',  'e',  'f',  'g',
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+     'h',  'i',  'j',  'k',  'l',  'm',  'n',  'o',
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+     'p',  'q',  'r',  's',  't',  'u',  'v',  'w',
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+     'x',  'y',  'z', 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
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+    0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
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+    0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
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+    0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
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+    0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
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+    0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
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+    0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
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+    0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
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+    0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
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+    0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
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+    0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
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+    0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
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+    0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
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+    0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
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+    0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
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+    0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
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+    0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
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+};
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+#else /* APR_CHARSET_EBCDIC */
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+/*
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+ * Derived from apr-iconv/ccs/cp037.c for EBCDIC case comparison,
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+ * provides unique identity of every char value (strict ISO-646
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+ * conformance, arbitrary election of an ISO-8859-1 ordering, and
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+ * very arbitrary control code assignments into C1 to achieve
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+ * identity and a reversible mapping of code points),
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+ * then folding the equivalences of ASCII 41-5A into 61-7A, 
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+ * presenting comparison results in a somewhat ISO/IEC 10646
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+ * (ASCII-like) order, depending on the EBCDIC code page in use.
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+ *
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+ * NOTE: Other than Alpha A-Z/a-z, each code point is unique!
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+ */
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+static const short ucharmap[] = {
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+  0x00, 0x01, 0x02, 0x03, 0x9C, 0x09, 0x86, 0x7F,
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+  0x97, 0x8D, 0x8E, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
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+  0x10, 0x11, 0x12, 0x13, 0x9D, 0x85, 0x08, 0x87,
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+  0x18, 0x19, 0x92, 0x8F, 0x1C, 0x1D, 0x1E, 0x1F,
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+  0x80, 0x81, 0x82, 0x83, 0x84, 0x0A, 0x17, 0x1B,
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+  0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x05, 0x06, 0x07,
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+  0x90, 0x91, 0x16, 0x93, 0x94, 0x95, 0x96, 0x04,
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+  0x98, 0x99, 0x9A, 0x9B, 0x14, 0x15, 0x9E, 0x1A,
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+  0x20, 0xA0, 0xE2, 0xE4, 0xE0, 0xE1, 0xE3, 0xE5,
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+  0xE7, 0xF1, 0xA2, 0x2E, 0x3C, 0x28, 0x2B, 0x7C,
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+  0x26, 0xE9, 0xEA, 0xEB, 0xE8, 0xED, 0xEE, 0xEF,
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+  0xEC, 0xDF, 0x21, 0x24, 0x2A, 0x29, 0x3B, 0xAC,
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+  0x2D, 0x2F, 0xC2, 0xC4, 0xC0, 0xC1, 0xC3, 0xC5,
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+  0xC7, 0xD1, 0xA6, 0x2C, 0x25, 0x5F, 0x3E, 0x3F,
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+  0xF8, 0xC9, 0xCA, 0xCB, 0xC8, 0xCD, 0xCE, 0xCF,
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+  0xCC, 0x60, 0x3A, 0x23, 0x40, 0x27, 0x3D, 0x22,
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+  0xD8, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
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+  0x68, 0x69, 0xAB, 0xBB, 0xF0, 0xFD, 0xFE, 0xB1,
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+  0xB0, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70,
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+  0x71, 0x72, 0xAA, 0xBA, 0xE6, 0xB8, 0xC6, 0xA4,
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+  0xB5, 0x7E, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
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+  0x79, 0x7A, 0xA1, 0xBF, 0xD0, 0xDD, 0xDE, 0xAE,
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+  0x5E, 0xA3, 0xA5, 0xB7, 0xA9, 0xA7, 0xB6, 0xBC,
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+  0xBD, 0xBE, 0x5B, 0x5D, 0xAF, 0xA8, 0xB4, 0xD7,
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+  0x7B, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
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+  0x68, 0x69, 0xAD, 0xF4, 0xF6, 0xF2, 0xF3, 0xF5,
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+  0x7D, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70,
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+  0x71, 0x72, 0xB9, 0xFB, 0xFC, 0xF9, 0xFA, 0xFF,
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+  0x5C, 0xF7, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78,
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+  0x79, 0x7A, 0xB2, 0xD4, 0xD6, 0xD2, 0xD3, 0xD5,
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+  0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
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+  0x38, 0x39, 0xB3, 0xDB, 0xDC, 0xD9, 0xDA, 0x9F
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+};
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+#endif
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+
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+AP_DECLARE(int) ap_cstr_casecmp(const char *s1, const char *s2)
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+{
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+    const unsigned char *str1 = (const unsigned char *)s1;
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+    const unsigned char *str2 = (const unsigned char *)s2;
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+    for (;;)
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+    {
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+        const int c1 = (int)(*str1);
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+        const int c2 = (int)(*str2);
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+        const int cmp = ucharmap[c1] - ucharmap[c2];
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+        /* Not necessary to test for !c2, this is caught by cmp */
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+        if (cmp || !c1)
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+            return cmp;
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+        str1++;
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+        str2++;
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+    }
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+}
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+
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+AP_DECLARE(int) ap_cstr_casecmpn(const char *s1, const char *s2, apr_size_t n)
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+{
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+    const unsigned char *str1 = (const unsigned char *)s1;
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+    const unsigned char *str2 = (const unsigned char *)s2;
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+    while (n--)
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+    {
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+        const int c1 = (int)(*str1);
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+        const int c2 = (int)(*str2);
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+        const int cmp = ucharmap[c1] - ucharmap[c2];
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+        /* Not necessary to test for !c2, this is caught by cmp */
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+        if (cmp || !c1)
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+            return cmp;
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+        str1++;
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+        str2++;
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+    }
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+    return 0;
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+}