Created
May 7, 2019 16:26
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Modern Node function for signing AWS REST HTTP request parameters with Version 2 Signature
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const crypto = require('crypto') | |
module.exports = (host, method, url, params, awsAccessKeyId, awsSecretAccessKey) => { | |
const timestamp = (new Date()).toISOString() | |
const newParams = `${params}&Timestamp=${timestamp}&AWSAccessKeyId=${awsAccessKeyId}` | |
const sortedParams = newParams | |
.split('&') | |
.map(a => { | |
const [k, v] = a.split('=') | |
const param = `${k}=${encodeURIComponent(v)}` | |
return { param, ascii: param.split('').map(g => g.charCodeAt()).join(',') } | |
}) | |
.sort((a, b) => { | |
return a.ascii.localeCompare(b.ascii, 'en', { numeric: true }) | |
}) | |
.map(a => a.param) | |
.join('&') | |
const toSign = `${method}\n${host}\n${url}\n${sortedParams}` | |
const signature = crypto.createHmac('sha256', awsSecretAccessKey).update(toSign).digest('base64') | |
return encodeURIComponent(signature) | |
} |
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const signParams = require('./sign') | |
const AWS_ACCESS_KEY_ID = 'AKIAIOSFODNN7EXAMPLE' | |
const AWS_SECRET_ACCESS_KEY = '1234567890' | |
const params = 'SignatureVersion=2&SignatureMethod=HmacSHA256&Version=2009-04-15&Version=2009-04-15' | |
const signature = signParams('sdb.amazonaws.com', 'GET', '/onca/xml', params, AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY)) |
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Correctly sorts and orders AWS REST HTTP parameters by byte value. Correctly escapes and URL-encodes parameter values.