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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace LambdaTwelve\OneRecord\Auth\Jwt; |
| 6 | |
| 7 | use DateTimeImmutable; |
| 8 | use Exception; |
| 9 | |
| 10 | /** |
| 11 | * The verified payload of a token. ONE Record requires iss, exp and |
| 12 | * logistics_agent_uri; everything else is whatever the identity provider put in. |
| 13 | */ |
| 14 | final readonly class Claims |
| 15 | { |
| 16 | public const string LOGISTICS_AGENT_URI = 'logistics_agent_uri'; |
| 17 | |
| 18 | /** |
| 19 | * @param array<string, mixed> $all |
| 20 | */ |
| 21 | public function __construct(public array $all) {} |
| 22 | |
| 23 | public function get(string $name): mixed |
| 24 | { |
| 25 | return $this->all[$name] ?? null; |
| 26 | } |
| 27 | |
| 28 | public function issuer(): ?string |
| 29 | { |
| 30 | return \is_string($this->all['iss'] ?? null) ? $this->all['iss'] : null; |
| 31 | } |
| 32 | |
| 33 | public function subject(): ?string |
| 34 | { |
| 35 | return \is_string($this->all['sub'] ?? null) ? $this->all['sub'] : null; |
| 36 | } |
| 37 | |
| 38 | /** |
| 39 | * @return list<string> |
| 40 | */ |
| 41 | public function audience(): array |
| 42 | { |
| 43 | $aud = $this->all['aud'] ?? null; |
| 44 | if (\is_string($aud)) { |
| 45 | return [$aud]; |
| 46 | } |
| 47 | if (\is_array($aud)) { |
| 48 | return array_values(array_filter($aud, is_string(...))); |
| 49 | } |
| 50 | |
| 51 | return []; |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * @throws JwtException when the claim is present but not a time |
| 56 | */ |
| 57 | public function expiresAt(): ?float |
| 58 | { |
| 59 | return $this->time('exp'); |
| 60 | } |
| 61 | |
| 62 | /** |
| 63 | * @throws JwtException when the claim is present but not a time |
| 64 | */ |
| 65 | public function notBefore(): ?float |
| 66 | { |
| 67 | return $this->time('nbf'); |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * @throws JwtException when the claim is present but not a time |
| 72 | */ |
| 73 | public function issuedAt(): ?float |
| 74 | { |
| 75 | return $this->time('iat'); |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Absent is null; present, null included, must be a time (R8-005). |
| 80 | * |
| 81 | * @throws JwtException |
| 82 | */ |
| 83 | private function time(string $claim): ?float |
| 84 | { |
| 85 | if (!\array_key_exists($claim, $this->all)) { |
| 86 | return null; |
| 87 | } |
| 88 | |
| 89 | return self::timestamp($this->all[$claim], $claim); |
| 90 | } |
| 91 | |
| 92 | public function tokenId(): ?string |
| 93 | { |
| 94 | return \is_string($this->all['jti'] ?? null) ? $this->all['jti'] : null; |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * The URI of the cargo:LogisticsAgent the caller acts as; the claim ONE Record adds to OAuth. |
| 99 | */ |
| 100 | public function logisticsAgentUri(): ?string |
| 101 | { |
| 102 | $value = $this->all[self::LOGISTICS_AGENT_URI] ?? null; |
| 103 | |
| 104 | return \is_string($value) && $value !== '' ? $value : null; |
| 105 | } |
| 106 | |
| 107 | /** |
| 108 | * RFC 7519 wants NumericDate, kept with its fraction; the spec's own |
| 109 | * example writes exp as an ISO string, so an absolute RFC 3339 instant |
| 110 | * with a zone is read too. Nothing else: a relative expression would get |
| 111 | * a new instant at every parse from the process clock, and a present but |
| 112 | * malformed claim is a refusal, never "absent" (R7-005). |
| 113 | * |
| 114 | * @throws JwtException |
| 115 | */ |
| 116 | private static function timestamp(mixed $value, string $claim): float |
| 117 | { |
| 118 | if (\is_int($value) || \is_float($value)) { |
| 119 | if (!is_finite((float) $value)) { |
| 120 | throw new JwtException(JwtException::INVALID_CLAIM, \sprintf('The %s claim is not a time.', $claim)); |
| 121 | } |
| 122 | |
| 123 | return (float) $value; |
| 124 | } |
| 125 | if (\is_string($value)) { |
| 126 | if (preg_match('/^\d{1,12}(\.\d+)?$/', $value) === 1) { |
| 127 | return (float) $value; |
| 128 | } |
| 129 | // The string form is this SDK's ONE Record compatibility extension, deliberately a smaller |
| 130 | // subset than RFC 3339: hours 00-23, minutes and seconds 00-59 (no leap second), offsets up |
| 131 | // to 14:00 (the largest in use; the RFC's grammar would allow up to 23:59). Checked before |
| 132 | // PHP sees the string, which would normalise 24:00 or +24:00 instead of refusing them (D9-002). |
| 133 | if (preg_match('/^(\d{4})-(\d{2})-(\d{2})T([01]\d|2[0-3]):[0-5]\d:[0-5]\d(\.\d+)?(Z|[+-](0\d|1[0-4]):([0-5]\d))$/', $value, $m) === 1 |
| 134 | && checkdate((int) $m[2], (int) $m[3], (int) $m[1]) |
| 135 | && !(($m[7] ?? '') === '14' && ($m[8] ?? '') !== '00')) { |
| 136 | try { |
| 137 | return (float) (new DateTimeImmutable($value))->format('U.u'); |
| 138 | } catch (Exception) { |
| 139 | // falls through to the refusal |
| 140 | } |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | throw new JwtException(JwtException::INVALID_CLAIM, \sprintf('The %s claim is not a time.', $claim)); |
| 145 | } |
| 146 | } |