131 lines
4.6 KiB
PHP
131 lines
4.6 KiB
PHP
<?php
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namespace Qcloud\Cos;
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use Psr\Http\Message\RequestInterface;
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class Signature {
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// string: access key.
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private $accessKey;
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// string: secret key.
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private $secretKey;
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// array: cos config.
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private $options;
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// string: token.
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private $token;
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// array: sign header.
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private $signHeader;
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public function __construct( $accessKey, $secretKey, $options, $token = null ) {
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$this->accessKey = $accessKey;
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$this->secretKey = $secretKey;
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$this->options = $options;
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$this->token = $token;
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$this->signHeader = [
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'cache-control',
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'content-disposition',
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'content-encoding',
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'content-length',
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'content-md5',
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'content-type',
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'expect',
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'expires',
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'host',
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'if-match',
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'if-modified-since',
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'if-none-match',
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'if-unmodified-since',
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'origin',
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'range',
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'transfer-encoding',
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];
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date_default_timezone_set($this->options['timezone']);
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}
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public function __destruct() {
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}
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public function needCheckHeader( $header ) {
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if ( startWith( $header, 'x-cos-' ) ) {
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return true;
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}
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if ( in_array( $header, $this->signHeader ) ) {
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return true;
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}
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return false;
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}
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public function signRequest( RequestInterface $request ) {
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$authorization = $this->createAuthorization( $request );
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return $request->withHeader( 'Authorization', $authorization );
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}
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public function createAuthorization( RequestInterface $request, $expires = '+30 minutes' ) {
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if ( is_null( $expires ) || !strtotime( $expires )) {
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$expires = '+30 minutes';
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}
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$signTime = ( string )( time() - 60 ) . ';' . ( string )( strtotime( $expires ) );
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$urlParamListArray = [];
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foreach ( explode( '&', $request->getUri()->getQuery() ) as $query ) {
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if (!empty($query)) {
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$tmpquery = explode( '=', $query );
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//为了保证CI的key中有=号的情况也能正常通过，ci在这层之前已经encode了，这里需要拆开重新encode，防止上方explode拆错
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$key = strtolower( rawurlencode(urldecode($tmpquery[0])) );
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if (count($tmpquery) >= 2) {
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$value = $tmpquery[1];
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} else {
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$value = "";
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}
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//host开关
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if (!$this->options['signHost'] && $key == 'host') {
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continue;
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}
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$urlParamListArray[$key] = $key. '='. $value;
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}
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}
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ksort($urlParamListArray);
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$urlParamList = join(';', array_keys($urlParamListArray));
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$httpParameters = join('&', array_values($urlParamListArray));
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$headerListArray = [];
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foreach ( $request->getHeaders() as $key => $value ) {
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$key = strtolower( urlencode( $key ) );
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$value = rawurlencode( $value[0] );
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if ( !$this->options['signHost'] && $key == 'host' ) {
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continue;
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}
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if ( $this->needCheckHeader( $key ) ) {
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$headerListArray[$key] = $key. '='. $value;
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}
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}
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ksort($headerListArray);
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$headerList = join(';', array_keys($headerListArray));
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$httpHeaders = join('&', array_values($headerListArray));
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$httpString = strtolower( $request->getMethod() ) . "\n" . urldecode( $request->getUri()->getPath() ) . "\n" . $httpParameters.
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"\n". $httpHeaders. "\n";
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$sha1edHttpString = sha1( $httpString );
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$stringToSign = "sha1\n$signTime\n$sha1edHttpString\n";
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$signKey = hash_hmac( 'sha1', $signTime, trim($this->secretKey) );
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$signature = hash_hmac( 'sha1', $stringToSign, $signKey );
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$authorization = 'q-sign-algorithm=sha1&q-ak='. trim($this->accessKey) .
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"&q-sign-time=$signTime&q-key-time=$signTime&q-header-list=$headerList&q-url-param-list=$urlParamList&" .
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"q-signature=$signature";
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return $authorization;
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}
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public function createPresignedUrl( RequestInterface $request, $expires = '+30 minutes' ) {
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$authorization = $this->createAuthorization( $request, $expires);
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$uri = $request->getUri();
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$query = 'sign='.urlencode( $authorization ) . '&' . $uri->getQuery();
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if ( $this->token != null ) {
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$query = $query.'&x-cos-security-token='.$this->token;
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}
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$uri = $uri->withQuery( $query );
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return $uri;
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}
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}
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