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<?php |
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/** |
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* Part of the AmazonGiftCode package. |
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* Author: Kashyap Merai <[email protected]> |
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* |
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*/ |
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namespace kamerk22\AmazonGiftCode\AWS; |
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use kamerk22\AmazonGiftCode\Client\Client; |
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use kamerk22\AmazonGiftCode\Config\Config; |
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use kamerk22\AmazonGiftCode\Exceptions\AmazonErrors; |
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use kamerk22\AmazonGiftCode\Response\CancelResponse; |
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use kamerk22\AmazonGiftCode\Response\CreateBalanceResponse; |
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use kamerk22\AmazonGiftCode\Response\CreateResponse; |
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class AWS |
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{ |
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public const SERVICE_NAME = 'AGCODService'; |
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public const ACCEPT_HEADER = 'accept'; |
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public const CONTENT_HEADER = 'content-type'; |
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public const HOST_HEADER = 'host'; |
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public const X_AMZ_DATE_HEADER = 'x-amz-date'; |
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public const X_AMZ_TARGET_HEADER = 'x-amz-target'; |
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public const AUTHORIZATION_HEADER = 'Authorization'; |
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public const AWS_SHA256_ALGORITHM = 'AWS4-HMAC-SHA256'; |
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public const KEY_QUALIFIER = 'AWS4'; |
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public const TERMINATION_STRING = 'aws4_request'; |
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public const CREATE_GIFT_CARD_SERVICE = 'CreateGiftCard'; |
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public const CANCEL_GIFT_CARD_SERVICE = 'CancelGiftCard'; |
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public const GET_AVAILABLE_FUNDS_SERVICE = 'GetAvailableFunds'; |
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private $_config; |
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/** |
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* AWS constructor. |
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* @param Config $config |
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*/ |
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public function __construct(Config $config) |
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{ |
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$this->_config = $config; |
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} |
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/** |
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* @param $amount |
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* @param $creationId |
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* @return CreateResponse |
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* |
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* @throws AmazonErrors |
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*/ |
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public function getCode($amount, $creationId = null): CreateResponse |
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{ |
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$serviceOperation = self::CREATE_GIFT_CARD_SERVICE; |
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$payload = $this->getGiftCardPayload($amount, $creationId); |
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$canonicalRequest = $this->getCanonicalRequest($serviceOperation, $payload); |
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$dateTimeString = $this->getTimestamp(); |
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$result = json_decode($this->makeRequest($payload, $canonicalRequest, $serviceOperation, $dateTimeString), true); |
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return new CreateResponse($result); |
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} |
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/** |
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* @param $creationRequestId |
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* @param $gcId |
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* @return CancelResponse |
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*/ |
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public function cancelCode($creationRequestId, $gcId): CancelResponse |
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{ |
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$serviceOperation = self::CANCEL_GIFT_CARD_SERVICE; |
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$payload = $this->getCancelGiftCardPayload($creationRequestId, $gcId); |
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$canonicalRequest = $this->getCanonicalRequest($serviceOperation, $payload); |
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$dateTimeString = $this->getTimestamp(); |
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$result = json_decode($this->makeRequest($payload, $canonicalRequest, $serviceOperation, $dateTimeString), true); |
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return new CancelResponse($result); |
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} |
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/** |
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* @return CreateBalanceResponse |
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*/ |
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public function getBalance(): CreateBalanceResponse |
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{ |
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$serviceOperation = self::GET_AVAILABLE_FUNDS_SERVICE; |
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$payload = $this->getAvailableFundsPayload(); |
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$canonicalRequest = $this->getCanonicalRequest($serviceOperation, $payload); |
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$dateTimeString = $this->getTimestamp(); |
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$result = json_decode($this->makeRequest($payload, $canonicalRequest, $serviceOperation, $dateTimeString), true); |
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return new CreateBalanceResponse($result); |
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} |
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/** |
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* @param $payload |
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* @param $canonicalRequest |
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* @param $serviceOperation |
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* @param $dateTimeString |
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* @return String |
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*/ |
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public function makeRequest($payload, $canonicalRequest, $serviceOperation, $dateTimeString): string |
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{ |
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$KEY_QUALIFIER = self::KEY_QUALIFIER; |
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$canonicalRequestHash = $this->buildHash($canonicalRequest); |
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$stringToSign = $this->buildStringToSign($canonicalRequestHash); |
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$authorizationValue = $this->buildAuthSignature($stringToSign); |
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$secretKey = $this->_config->getSecret(); |
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$endpoint = $this->_config->getEndpoint(); |
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$regionName = $this->getRegion(); |
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$SERVICE_NAME = 'AGCODService'; |
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$serviceTarget = 'com.amazonaws.agcod.' . $SERVICE_NAME . '.' . $serviceOperation; |
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$dateString = $this->getDateString(); |
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$signatureAWSKey = $KEY_QUALIFIER . $secretKey; |
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$kDate = $this->hmac($dateString, $signatureAWSKey); |
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$kDate_hexis = $this->hmac($dateString, $signatureAWSKey, false); |
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$kRegion = $this->hmac($regionName, $kDate); |
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$kRegion_hexis = $this->hmac($regionName, $kDate, false); |
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$kService_hexis = $this->hmac($SERVICE_NAME, $kRegion, false); |
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$url = 'https://' . $endpoint . '/' . $serviceOperation; |
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$headers = $this->buildHeaders($payload, $authorizationValue, $dateTimeString, $serviceTarget); |
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return (new Client())->request($url, $headers, $payload); |
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} |
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/** |
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* @param $payload |
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* @param $authorizationValue |
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* @param $dateTimeString |
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* @param $serviceTarget |
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* @return array |
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*/ |
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public function buildHeaders($payload, $authorizationValue, $dateTimeString, $serviceTarget): array |
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{ |
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$ACCEPT_HEADER = self::ACCEPT_HEADER; |
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$X_AMZ_DATE_HEADER = self::X_AMZ_DATE_HEADER; |
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$X_AMZ_TARGET_HEADER = self::X_AMZ_TARGET_HEADER; |
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$AUTHORIZATION_HEADER = self::AUTHORIZATION_HEADER; |
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return [ |
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'Content-Type:' . $this->getContentType(), |
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'Content-Length: ' . strlen($payload), |
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$AUTHORIZATION_HEADER . ':' . $authorizationValue, |
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$X_AMZ_DATE_HEADER . ':' . $dateTimeString, |
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$X_AMZ_TARGET_HEADER . ':' . $serviceTarget, |
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$ACCEPT_HEADER . ':' . $this->getContentType() |
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]; |
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} |
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/** |
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* @param $stringToSign |
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* @return string |
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*/ |
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public function buildAuthSignature($stringToSign): string |
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{ |
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$AWS_SHA256_ALGORITHM = self::AWS_SHA256_ALGORITHM; |
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$SERVICE_NAME = self::SERVICE_NAME; |
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$TERMINATION_STRING = self::TERMINATION_STRING; |
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$ACCEPT_HEADER = self::ACCEPT_HEADER; |
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$HOST_HEADER = self::HOST_HEADER; |
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$X_AMZ_DATE_HEADER = self::X_AMZ_DATE_HEADER; |
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$X_AMZ_TARGET_HEADER = self::X_AMZ_TARGET_HEADER; |
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$awsKeyId = $this->_config->getAccessKey(); |
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$regionName = $this->getRegion(); |
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$dateString = $this->getDateString(); |
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$derivedKey = $this->buildDerivedKey(); |
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// Calculate signature per http://docs.aws.amazon.com/general/latest/gr/sigv4-calculate-signature.html |
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$finalSignature = $this->hmac($stringToSign, $derivedKey, false); |
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// Assemble Authorization Header with signing information |
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// per http://docs.aws.amazon.com/general/latest/gr/sigv4-add-signature-to-request.html |
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$authorizationValue = |
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$AWS_SHA256_ALGORITHM |
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. ' Credential=' . $awsKeyId |
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. '/' . $dateString . '/' . $regionName . '/' . $SERVICE_NAME . '/' . $TERMINATION_STRING . ',' |
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. ' SignedHeaders=' |
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. $ACCEPT_HEADER . ';' . $HOST_HEADER . ';' . $X_AMZ_DATE_HEADER . ';' . $X_AMZ_TARGET_HEADER . ',' |
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. ' Signature=' |
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. $finalSignature; |
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return $authorizationValue; |
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} |
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/** |
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* @param $canonicalRequestHash |
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* @return string |
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*/ |
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public function buildStringToSign($canonicalRequestHash): string |
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{ |
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$AWS_SHA256_ALGORITHM = self::AWS_SHA256_ALGORITHM; |
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$TERMINATION_STRING = self::TERMINATION_STRING; |
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$SERVICE_NAME = self::SERVICE_NAME; |
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$regionName = $this->getRegion(); |
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$dateTimeString = $this->getTimestamp(); |
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$dateString = $this->getDateString(); |
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$stringToSign = "$AWS_SHA256_ALGORITHM\n$dateTimeString\n$dateString/$regionName/$SERVICE_NAME/$TERMINATION_STRING\n$canonicalRequestHash"; |
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return $stringToSign; |
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} |
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/** |
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* @param bool $rawOutput |
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* @return string |
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*/ |
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public function buildDerivedKey($rawOutput = true): string |
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{ |
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$KEY_QUALIFIER = self::KEY_QUALIFIER; |
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$TERMINATION_STRING = self::TERMINATION_STRING; |
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$SERVICE_NAME = self::SERVICE_NAME; |
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$awsSecretKey = $this->_config->getSecret(); |
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// Append Key Qualifier, "AWS4", to secret key per http://docs.aws.amazon.com/general/latest/gr/signature-v4-examples.html |
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$signatureAWSKey = $KEY_QUALIFIER . $awsSecretKey; |
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$regionName = $this->getRegion(); |
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$dateString = $this->getDateString(); |
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$kDate = $this->hmac($dateString, $signatureAWSKey); |
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$kRegion = $this->hmac($regionName, $kDate); |
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$kService = $this->hmac($SERVICE_NAME, $kRegion); |
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// Derived the Signing key (derivedKey aka kSigning) |
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return $this->hmac($TERMINATION_STRING, $kService, $rawOutput); |
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} |
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/** |
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* @return string |
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*/ |
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public function getRegion(): string |
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{ |
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$endpoint = $this->_config->getEndpoint(); |
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$regionName = 'us-east-1'; |
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if ($endpoint === 'agcod-v2-eu.amazon.com' || $endpoint === 'agcod-v2-eu-gamma.amazon.com') { |
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$regionName = 'eu-west-1'; |
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} else if ($endpoint === 'agcod-v2-fe.amazon.com' || $endpoint === 'agcod-v2-fe-gamma.amazon.com') { |
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$regionName = 'us-west-2'; |
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} |
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return $regionName; |
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} |
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/** |
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* @param $amount |
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* @param $creationId |
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* @return string |
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*/ |
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public function getGiftCardPayload($amount, $creationId = null): string |
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{ |
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$amount = trim($amount); |
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$payload = [ |
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'creationRequestId' => $creationId ?: uniqid($this->_config->getPartner().'_'), |
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'partnerId' => $this->_config->getPartner(), |
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'value' => |
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[ |
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'currencyCode' => $this->_config->getCurrency(), |
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'amount' => (float)$amount |
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] |
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]; |
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return json_encode($payload); |
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} |
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/** |
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* @param $creationRequestId |
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* @param $gcId |
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* @return string |
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*/ |
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public function getCancelGiftCardPayload($creationRequestId, $gcId): string |
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{ |
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$gcResponseId = trim($gcId); |
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$payload = [ |
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'creationRequestId' => $creationRequestId, |
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'partnerId' => $this->_config->getPartner(), |
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'gcId' => $gcResponseId |
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]; |
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return json_encode($payload); |
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} |
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/** |
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* @return string |
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*/ |
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public function getAvailableFundsPayload(): string |
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{ |
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$payload = [ |
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'partnerId' => $this->_config->getPartner(), |
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]; |
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return json_encode($payload); |
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} |
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/** |
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* @param $serviceOperation |
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* @param $payload |
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* @return string |
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*/ |
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public function getCanonicalRequest($serviceOperation, $payload): string |
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{ |
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$HOST_HEADER = self::HOST_HEADER; |
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$X_AMZ_DATE_HEADER = self::X_AMZ_DATE_HEADER; |
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$X_AMZ_TARGET_HEADER = self::X_AMZ_TARGET_HEADER; |
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$ACCEPT_HEADER = self::ACCEPT_HEADER; |
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$payloadHash = $this->buildHash($payload); |
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$canonicalHeaders = $this->buildCanonicalHeaders($serviceOperation); |
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$canonicalRequest = "POST\n/$serviceOperation\n\n$canonicalHeaders\n\n$ACCEPT_HEADER;$HOST_HEADER;$X_AMZ_DATE_HEADER;$X_AMZ_TARGET_HEADER\n$payloadHash"; |
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return $canonicalRequest; |
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} |
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/** |
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* @param $data |
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* @return string |
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*/ |
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public function buildHash($data): string |
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{ |
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return hash('sha256', $data); |
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} |
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/** |
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* @return false|string |
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*/ |
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public function getTimestamp() |
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{ |
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return gmdate('Ymd\THis\Z'); |
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} |
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/** |
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* @param $data |
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* @param $key |
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* @param bool $raw |
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* @return string |
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*/ |
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public function hmac($data, $key, $raw = true): string |
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{ |
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return hash_hmac('sha256', $data, $key, $raw); |
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} |
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/** |
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* @return bool|string |
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*/ |
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public function getDateString() |
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{ |
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return substr($this->getTimestamp(), 0, 8); |
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} |
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|
347
|
|
|
/** |
348
|
|
|
* @return string |
349
|
|
|
*/ |
350
|
|
|
public function getContentType(): string |
351
|
|
|
{ |
352
|
|
|
return 'application/json'; |
353
|
|
|
} |
354
|
|
|
|
355
|
|
|
/** |
356
|
|
|
* @param $serviceOperation |
357
|
|
|
* @return string |
358
|
|
|
*/ |
359
|
|
|
public function buildCanonicalHeaders($serviceOperation): string |
360
|
|
|
{ |
361
|
|
|
$ACCEPT_HEADER = self::ACCEPT_HEADER; |
362
|
|
|
$HOST_HEADER = self::HOST_HEADER; |
363
|
|
|
$X_AMZ_DATE_HEADER = self::X_AMZ_DATE_HEADER; |
364
|
|
|
$X_AMZ_TARGET_HEADER = self::X_AMZ_TARGET_HEADER; |
365
|
|
|
$dateTimeString = $this->getTimestamp(); |
366
|
|
|
$endpoint = $this->_config->getEndpoint(); |
367
|
|
|
$contentType = $this->getContentType(); |
368
|
|
|
return |
369
|
|
|
"$ACCEPT_HEADER:$contentType\n$HOST_HEADER:$endpoint\n$X_AMZ_DATE_HEADER:$dateTimeString\n$X_AMZ_TARGET_HEADER:com.amazonaws.agcod.AGCODService.$serviceOperation"; |
370
|
|
|
} |
371
|
|
|
} |
372
|
|
|
|