php - Signature does not match in Amazon Web Services -

-

i writing php code amazon web services. code.

<?php  function amazonencode($text) {     $encodedtext = "";     $j = strlen($text);     ($i = 0; $i < $j; $i++) {         $c = substr($text, $i, 1);         if (!preg_match("/[a-za-z0-9-_.~]/", $c)) {             $encodedtext .= sprintf("%%%02x", ord($c));         } else {             $encodedtext .= $c;         }     }     return $encodedtext; }  function amazonsign($url, $secretaccesskey) {     // 0. append timestamp parameter     $url .= "&timestamp=" . gmdate("y-m-dth:i:sz");     // 1a. sort utf-8 query string components parameter name     $urlparts = parse_url($url);     parse_str($urlparts["query"], $queryvars);     ksort($queryvars);     // 1b. url encode parameter name , values     $encodedvars = array();     foreach ($queryvars $key => $value) {         $encodedvars[amazonencode($key)] = amazonencode($value);     }     // 1c. 1d. reconstruct encoded query     $encodedqueryvars = array();     foreach ($encodedvars $key => $value) {         $encodedqueryvars[] = $key . "=" . $value;     }     $encodedquery = implode("&", $encodedqueryvars);     // 2. create string sign     $stringtosign = "get";     $stringtosign .= "n" . strtolower($urlparts["host"]);     $stringtosign .= "n" . $urlparts["path"];     $stringtosign .= "n" . $encodedquery;     // 3. calculate rfc 2104-compliant hmac string created,     //    secret access key key, , sha256 hash algorithm.     if (function_exists("hash_hmac")) {         $hmac = hash_hmac("sha256", $stringtosign, $secretaccesskey, true);     } elseif (function_exists("mhash")) {         $hmac = mhash(mhash_sha256, $stringtosign, $secretaccesskey);     } else {         die("no hash function available!");     }     // 4. convert resulting value base64     $hmacbase64 = base64_encode($hmac);     // 5. use resulting value value of signature request parameter     // (url encoded per step 1b)     $url .= "&signature=" . amazonencode($hmacbase64);     echo $url; }  $url = 'http://webservices.amazon.com/onca/xml?service=awsecommerceservice&awsaccesskeyid=something&associatetag=something&operation=itemsearch&keywords=mustang&searchindex=blended&condition=collectible&timestamp=2016-08-08t12%3a00%3a00z&version=2013-08-01'; $secret_key = 'my_secret_key'; $url = amazonsign($url, $secret_key); ?>

this code returns me url. use url inside browser can search results using url gives me error.

signaturedoesnotmatchthe request signature calculated not match signature provided. check aws secret access key , signing method. consult service documentation details.

i using these awsaccesskeyid , secret_key.

enter image description here

it's $stringtosign .= "n" should $stringtosign .= "\n" might not problem. if use official php sdk amazon instead of relying on custom scripts you'll have less issues.


Comments

Post a Comment

Popular posts from this blog

Spring Boot + JPA + Hibernate: Unable to locate persister -

-
i trying work entity inside request method of spring boot application. entity in project , pom.xml has dependencies it. why error message?: org.hibernate.unknownentitytypeexception: unable locate persister: com.ric.bill.model.bs.par package com.ric.web; import java.util.concurrent.atomic.atomiclong; import javax.persistence.entitymanager; import javax.persistence.persistencecontext; import net.sf.ehcache.cachemanager; import net.sf.ehcache.management.cache; import net.sf.ehcache.management.cachestatistics; import org.hibernate.stat.statistics; import org.springframework.beans.factory.annotation.autowired; import org.springframework.boot.autoconfigure.domain.entityscan; import org.springframework.cache.annotation.enablecaching; import org.springframework.transaction.annotation.enabletransactionmanagement; import org.springframework.transaction.annotation.propagation; import org.springframework.transaction.annotation.transactional; import org.springframework.web.bind.annotati
Read more

go - Golang: panic: runtime error: invalid memory address or nil pointer dereference using bufio.Scanner -

-
i implementing go program uses bufio.scanner , bufio.writer have packaged code follows package main import ( "fmt" "player/command" "strings" ) func main() { //enter code here. read input stdin. print output stdout commands.scanner.scan() { //scan new line , send comand variable check command exist or not input := strings.split(strings.trim(commands.scanner.text(), " "), " ") command := input[0] if command == "" { fmt.printf("$ %s:", commands.pwd) continue } if !commands.commands[command] { commands.throwerror("cannot recognize input.") } else { commands.execute(command, input[1:], nil) } fmt.printf("$ %s:", commands.pwd) } } i using init.go file in main package follows package main import ( "flag" "player/sourc
Read more

c - double free or corruption (fasttop) -

-
this code reads null terminated string file (file containing null terminated strings & should provide index wanted string). error: *** error in `./main': double free or corruption (fasttop): 0x090a4a80 *** aborted code: char *tmp_realloc=null; char *sstring=null; int i=1; /*set file pointer point string*/ fseek(fh,index,seek_set); sstring=(char*)malloc(sizeof(char)); if(sstring == null) return null; tmp_realloc=sstring; while( (*(sstring+i-1)=(char)fgetc((file*)fh)) != 0x0 ) { /*reallocate more memory*/ tmp_realloc=(char*)realloc((char*)sstring,++i); /*if not same address copy old new & set old point new*/ if(tmp_realloc != sstring){ strcpy((char*)tmp_realloc,(char*)sstring); free(sstring); sstring=tmp_realloc; } } could tell me pointer causing issue (& reason) ? remove part /*if not same address copy old new & set old point new*/ if(tmp_realloc != sstring){ strc
Read more