44 lines
1.4 KiB
Ruby
44 lines
1.4 KiB
Ruby
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require 'base64'
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require 'openssl'
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module Cellar
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class AmazonV2RequestSigner
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def initialize(access_key_id, secret_access_key, bucket)
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@access_key_id = access_key_id
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@secret_access_key = secret_access_key
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@bucket = bucket
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end
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def sign(request, key)
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date = Time.now.httpdate
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sig = signature(
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method: request.method,
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key: key,
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date: date,
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checksum: request['Content-MD5'] || '',
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content_type: request.content_type || ''
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)
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request['date'] = date
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request['authorization'] = "AWS #{@access_key_id}:#{sig}"
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end
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def url_signature_params(method:, key:, expires_in:, content_type: '', checksum: '')
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expires = expires_in.from_now.to_i
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{
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AWSAccessKeyId: @access_key_id,
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Expires: expires,
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Signature: signature(method: method, key: key, expires: expires, content_type: content_type, checksum: checksum)
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}
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end
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def signature(method:, key:, expires: '', date: '', content_type: '', checksum: '')
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canonicalized_amz_headers = ""
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canonicalized_resource = "/#{@bucket}/#{key}"
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string_to_sign = "#{method}\n#{checksum}\n#{content_type}\n#{expires}#{date}\n" +
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"#{canonicalized_amz_headers}#{canonicalized_resource}"
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Base64.encode64(OpenSSL::HMAC.digest(OpenSSL::Digest.new('sha1'), @secret_access_key, string_to_sign)).strip
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end
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end
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end
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