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v3.js (2077B)

      1 var AWS = require('../core');
      2 var inherit = AWS.util.inherit;
      3 
      4 /**
      5  * @api private
      6  */
      7 AWS.Signers.V3 = inherit(AWS.Signers.RequestSigner, {
      8   addAuthorization: function addAuthorization(credentials, date) {
      9 
     10     var datetime = AWS.util.date.rfc822(date);
     11 
     12     this.request.headers['X-Amz-Date'] = datetime;
     13 
     14     if (credentials.sessionToken) {
     15       this.request.headers['x-amz-security-token'] = credentials.sessionToken;
     16     }
     17 
     18     this.request.headers['X-Amzn-Authorization'] =
     19       this.authorization(credentials, datetime);
     20 
     21   },
     22 
     23   authorization: function authorization(credentials) {
     24     return 'AWS3 ' +
     25       'AWSAccessKeyId=' + credentials.accessKeyId + ',' +
     26       'Algorithm=HmacSHA256,' +
     27       'SignedHeaders=' + this.signedHeaders() + ',' +
     28       'Signature=' + this.signature(credentials);
     29   },
     30 
     31   signedHeaders: function signedHeaders() {
     32     var headers = [];
     33     AWS.util.arrayEach(this.headersToSign(), function iterator(h) {
     34       headers.push(h.toLowerCase());
     35     });
     36     return headers.sort().join(';');
     37   },
     38 
     39   canonicalHeaders: function canonicalHeaders() {
     40     var headers = this.request.headers;
     41     var parts = [];
     42     AWS.util.arrayEach(this.headersToSign(), function iterator(h) {
     43       parts.push(h.toLowerCase().trim() + ':' + String(headers[h]).trim());
     44     });
     45     return parts.sort().join('\n') + '\n';
     46   },
     47 
     48   headersToSign: function headersToSign() {
     49     var headers = [];
     50     AWS.util.each(this.request.headers, function iterator(k) {
     51       if (k === 'Host' || k === 'Content-Encoding' || k.match(/^X-Amz/i)) {
     52         headers.push(k);
     53       }
     54     });
     55     return headers;
     56   },
     57 
     58   signature: function signature(credentials) {
     59     return AWS.util.crypto.hmac(credentials.secretAccessKey, this.stringToSign(), 'base64');
     60   },
     61 
     62   stringToSign: function stringToSign() {
     63     var parts = [];
     64     parts.push(this.request.method);
     65     parts.push('/');
     66     parts.push('');
     67     parts.push(this.canonicalHeaders());
     68     parts.push(this.request.body);
     69     return AWS.util.crypto.sha256(parts.join('\n'));
     70   }
     71 
     72 });
     73 
     74 module.exports = AWS.Signers.V3;