c6c2c525a6
Also fix some tests that were broken by bumping golang and dependencies in the previous commits. Note that in addition to changes made to satisfy the linter which do not impact the behavior of the code, this commit also adds ReadHeaderTimeout to all usages of http.Server to satisfy the linter (and because it seemed like a good suggestion).
61 lines
2.0 KiB
Go
61 lines
2.0 KiB
Go
// Copyright 2021-2022 the Pinniped contributors. All Rights Reserved.
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// SPDX-License-Identifier: Apache-2.0
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// Package formposthtml defines HTML templates used by the Supervisor.
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package formposthtml
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import (
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_ "embed" // Needed to trigger //go:embed directives below.
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"html/template"
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"strings"
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"github.com/tdewolff/minify/v2/minify"
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"go.pinniped.dev/internal/oidc/provider/csp"
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)
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//nolint:gochecknoglobals // This package uses globals to ensure that all parsing and minifying happens at init.
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var (
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//go:embed form_post.css
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rawCSS string
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minifiedCSS = panicOnError(minify.CSS(rawCSS))
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//go:embed form_post.js
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rawJS string
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minifiedJS = panicOnError(minify.JS(rawJS))
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//go:embed form_post.gohtml
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rawHTMLTemplate string
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// Parse the Go templated HTML and inject functions providing the minified inline CSS and JS.
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parsedHTMLTemplate = template.Must(template.New("form_post.gohtml").Funcs(template.FuncMap{
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"minifiedCSS": func() template.CSS { return template.CSS(minifiedCSS) },
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"minifiedJS": func() template.JS { return template.JS(minifiedJS) }, //nolint:gosec // This is 100% static input, not attacker-controlled.
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}).Parse(rawHTMLTemplate))
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// Generate the CSP header value once since it's effectively constant.
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cspValue = strings.Join([]string{
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`default-src 'none'`,
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`script-src '` + csp.Hash(minifiedJS) + `'`,
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`style-src '` + csp.Hash(minifiedCSS) + `'`,
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`img-src data:`,
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`connect-src *`,
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`frame-ancestors 'none'`,
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}, "; ")
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)
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func panicOnError(s string, err error) string {
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if err != nil {
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panic(err)
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}
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return s
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}
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// ContentSecurityPolicy returns the Content-Security-Policy header value to make the Template() operate correctly.
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//
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// See https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy.
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func ContentSecurityPolicy() string { return cspValue }
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// Template returns the html/template.Template for rendering the response_type=form_post response page.
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func Template() *template.Template { return parsedHTMLTemplate }
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