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<?php
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namespace Aws\Signature;
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use Aws\Credentials\CredentialsInterface;
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use AWS\CRT\Auth\SignatureType;
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use AWS\CRT\Auth\SigningAlgorithm;
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use AWS\CRT\Auth\SigningConfigAWS;
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use Psr\Http\Message\RequestInterface;
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/**
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* Amazon S3 signature version 4 support.
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*/
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class S3SignatureV4 extends SignatureV4
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{
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/**
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* S3-specific signing logic
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*
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* {@inheritdoc}
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*/
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use SignatureTrait;
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public function signRequest(
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RequestInterface $request,
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CredentialsInterface $credentials,
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$signingService = null
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) {
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// Always add a x-amz-content-sha-256 for data integrity
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if (!$request->hasHeader('x-amz-content-sha256')) {
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$request = $request->withHeader(
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'x-amz-content-sha256',
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$this->getPayload($request)
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);
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}
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$useCrt =
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strpos($request->getUri()->getHost(), "accesspoint.s3-global")
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!== false;
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if (!$useCrt) {
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if (strpos($request->getUri()->getHost(), "s3-object-lambda")) {
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return parent::signRequest($request, $credentials, "s3-object-lambda");
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}
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return parent::signRequest($request, $credentials);
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}
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$signingService = $signingService ?: 's3';
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return $this->signWithV4a($credentials, $request, $signingService);
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}
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/**
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* @param CredentialsInterface $credentials
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* @param RequestInterface $request
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* @param $signingService
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* @param SigningConfigAWS|null $signingConfig
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* @return RequestInterface
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*
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* Instantiates a separate sigv4a signing config. All services except S3
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* use double encoding. All services except S3 require path normalization.
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*/
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protected function signWithV4a(
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CredentialsInterface $credentials,
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RequestInterface $request,
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$signingService,
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?SigningConfigAWS $signingConfig = null
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){
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$this->verifyCRTLoaded();
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$credentials_provider = $this->createCRTStaticCredentialsProvider($credentials);
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$signingConfig = new SigningConfigAWS([
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'algorithm' => SigningAlgorithm::SIGv4_ASYMMETRIC,
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'signature_type' => SignatureType::HTTP_REQUEST_HEADERS,
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'credentials_provider' => $credentials_provider,
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'signed_body_value' => $this->getPayload($request),
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'region' => $this->region,
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'should_normalize_uri_path' => false,
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'use_double_uri_encode' => false,
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'service' => $signingService,
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'date' => time(),
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]);
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return parent::signWithV4a($credentials, $request, $signingService, $signingConfig);
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}
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/**
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* Always add a x-amz-content-sha-256 for data integrity.
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*
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* {@inheritdoc}
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*/
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public function presign(
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RequestInterface $request,
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CredentialsInterface $credentials,
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$expires,
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array $options = []
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) {
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if (!$request->hasHeader('x-amz-content-sha256')) {
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$request = $request->withHeader(
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'X-Amz-Content-Sha256',
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$this->getPresignedPayload($request)
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);
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}
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if (strpos($request->getUri()->getHost(), "accesspoint.s3-global")) {
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$request = $request->withHeader("x-amz-region-set", "*");
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}
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return parent::presign($request, $credentials, $expires, $options);
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}
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/**
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* Override used to allow pre-signed URLs to be created for an
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* in-determinate request payload.
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*/
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protected function getPresignedPayload(RequestInterface $request)
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{
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return SignatureV4::UNSIGNED_PAYLOAD;
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}
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/**
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* Amazon S3 does not double-encode the path component in the canonical request
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*/
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protected function createCanonicalizedPath($path)
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{
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// Only remove one slash in case of keys that have a preceding slash
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if (substr($path, 0, 1) === '/') {
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$path = substr($path, 1);
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}
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return '/' . $path;
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}
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}
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