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< h2 id = "usage" > Usage< / h2 >
< p > See the < a href = "http://shaarli.github.io/api-documentation/" > REST API documentation< / a > .< / p >
< h2 id = "authentication" > Authentication< / h2 >
< p > All requests to Shaarli's API must include a JWT token to verify their authenticity.< / p >
< p > This token has to be included as an HTTP header called < code > Authentication: Bearer < jwt token> < / code > .< / p >
< p > JWT resources :< / p >
< ul >
< li > < a href = "https://jwt.io" > jwt.io< / a > (including a list of client per language).< / li >
< li > RFC : https://tools.ietf.org/html/rfc7519< / li >
< li > https://float-middle.com/json-web-tokens-jwt-vs-sessions/< / li >
< li > HackerNews thread: https://news.ycombinator.com/item?id=11929267< / li >
< / ul >
< h3 id = "shaarli-jwt-token" > Shaarli JWT Token< / h3 >
< p > JWT tokens are composed by three parts, separated by a dot < code > .< / code > and encoded in base64:< / p >
< pre > < code > [header].[payload].[signature]
< / code > < / pre >
< h4 id = "header" > Header< / h4 >
< p > Shaarli only allow one hash algorithm, so the header will always be the same:< / p >
< pre > < code class = "json" > {
" typ" : " JWT" ,
" alg" : " HS512"
}
< / code > < / pre >
< p > Encoded in base64, it gives:< / p >
< pre > < code > ewogICAgICAgICJ0eXAiOiAiSldUIiwKICAgICAgICAiYWxnIjogIkhTNTEyIgogICAgfQ==
< / code > < / pre >
< h4 id = "payload" > Payload< / h4 >
< p > < strong > Validity duration< / strong > < / p >
< p > To avoid infinite token validity, JWT tokens must include their creation date in UNIX timestamp format (timezone independant - UTC) under the key < code > iat< / code > (issued at). This token will be accepted during 9 minutes.< / p >
< pre > < code class = "json" > {
" iat" : 1468663519
}
< / code > < / pre >
< p > See < a href = "https://tools.ietf.org/html/rfc7519#section-4.1.6" > RFC reference< / a > .< / p >
< h4 id = "signature" > Signature< / h4 >
< p > The signature authenticate the token validity. It contains the base64 of the header and the body, separated by a dot < code > .< / code > , hashed in SHA512 with the API secret available in Shaarli administration page.< / p >
< p > Signature example with PHP:< / p >
< pre > < code class = "php" > $content = base64_encode($header) . '.' . base64_encode($payload);
$signature = hash_hmac('sha512', $content, $secret);
< / code > < / pre >
< h3 id = "complete-example" > Complete example< / h3 >
< h4 id = "php" > PHP< / h4 >
< pre > < code class = "php" > function generateToken($secret) {
$header = base64_encode('{
" typ" : " JWT" ,
" alg" : " HS512"
}');
$payload = base64_encode('{
" iat" : '. time() .'
}');
$signature = hash_hmac('sha512', $header .'.'. $payload , $secret);
return $header .'.'. $payload .'.'. $signature;
}
$secret = 'mysecret';
$token = generateToken($secret);
echo $token;
< / code > < / pre >
< blockquote >
< p > < code > ewogICAgICAgICJ0eXAiOiAiSldUIiwKICAgICAgICAiYWxnIjogIkhTNTEyIgogICAgfQ==.ewogICAgICAgICJpYXQiOiAxNDY4NjY3MDQ3CiAgICB9.1d2c54fa947daf594fdbf7591796195652c8bc63bffad7f6a6db2a41c313f495a542cbfb595acade79e83f3810d709b4251d7b940bbc10b531a6e6134af63a68< / code > < / p >
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< pre > < code class = "php" > $options = [
'http' => [
'method' => 'GET',
'jwt' => $token,
],
];
$context = stream_context_create($options);
file_get_contents($apiEndpoint, false, $context);
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