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<?php |
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namespace Ubiquity\security\csp; |
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use Ubiquity\utils\http\UResponse; |
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/** |
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* Creates a Content Security Policy object. |
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* Ubiquity\security\csp$ContentSecurity |
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* This class is part of Ubiquity |
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* |
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* @author jc |
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* @version 1.0.0 |
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* |
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*/ |
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class ContentSecurity { |
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const HEADER = 'Content-Security-Policy'; |
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const DEBUG_HEADER = 'Content-Security-Policy-Report-Only'; |
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private array $policies = []; |
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private $header = self::HEADER; |
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public function addPolicy(string $directive, string ...$values): self { |
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$policies = $this->policies[$directive] ?? []; |
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foreach ($values as $v) { |
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if (\in_array($v, CspValues::QUOTED)) { |
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$v = "'$v'"; |
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} |
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$policies[$v] = true; |
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} |
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$this->policies[$directive] = $policies; |
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return $this; |
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} |
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public function addPolicyDefault(string $directive, string ...$values): self { |
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$default = \array_keys($this->policies[CspDirectives::DEFAULT_SRC] ?? []); |
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$values = \array_merge($default, $values); |
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$this->addPolicy($directive, ...$values); |
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return $this; |
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} |
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public function addNonce(string $nonce, string ...$directives): self { |
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foreach ($directives as $directive) { |
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$this->addPolicy($directive, "'nonce-$nonce'", CspValues::STRICT_DYNAMIC); |
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} |
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return $this; |
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} |
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public function addNonceDefault(string $nonce, string ...$directives): self { |
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foreach ($directives as $directive) { |
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$this->addPolicyDefault($directive, "'nonce-$nonce'", CspValues::STRICT_DYNAMIC); |
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} |
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return $this; |
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} |
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public function setDefaultSrc(string ...$policies) { |
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return $this->addPolicy(CspDirectives::DEFAULT_SRC, ...$policies); |
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} |
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public function generate(): string { |
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$strs = ''; |
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foreach ($this->policies as $directive => $policy) { |
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$policies = \array_keys($policy); |
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$strs .= $directive . ' ' . \implode(' ', $policies) . ';'; |
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} |
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return $strs; |
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} |
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public function reportOnly(bool $reportOnly = true): self { |
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$this->header = $reportOnly ? self::DEBUG_HEADER : self::HEADER; |
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return $this; |
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} |
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public function addHeaderToResponse(?bool $reportOnly = null): void { |
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if (isset($reportOnly)) { |
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$this->reportOnly($reportOnly); |
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} |
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UResponse::header($this->header, $this->generate(), false); |
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} |
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public static function nonce($nonce, string ...$directives): ContentSecurity { |
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$csp = new self(); |
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return $csp->addNonce($nonce, ...$directives); |
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} |
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public static function all(): ContentSecurity { |
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$csp = new self(); |
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return $csp->addPolicy(CspDirectives::DEFAULT_SRC, CspValues::SELF); |
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} |
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public static function defaultUbiquity(): ContentSecurity { |
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$csp = new self(); |
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$csp->addPolicy(CspDirectives::DEFAULT_SRC, 'self', 'cdn.jsdelivr.net', 'cdnjs.cloudflare.com'); |
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$csp->addPolicyDefault(CspDirectives::FONT_SRC, 'fonts.googleapis.com', 'fonts.gstatic.com', 'data:'); |
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$csp->addPolicyDefault(CspDirectives::STYLE_SRC, CspValues::UNSAFE_INLINE, 'fonts.googleapis.com'); |
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$csp->addPolicyDefault(CspDirectives::SCRIPT_SRC_ELM, CspValues::UNSAFE_INLINE); |
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$csp->addPolicy(CspDirectives::IMG_SRC, 'data:'); |
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return $csp; |
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} |
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} |
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phpMv /
ubiquity-security
