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module AliyunVod::Sign
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# https://help.aliyun.com/document_detail/44434.html?spm=a2c4g.11186623.2.16.354c7853oqlhMb&/#SignatureNonce
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def self.generate(params, **opts)
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method = opts[:method] || 'POST'
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key = opts[:key] || AliyunVod.access_key_secret + '&'
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digest = OpenSSL::Digest.new('sha1')
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str = params_to_string(params)
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str = percent_encode(str)
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str = "#{method}&%2F&#{str}"
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Base64.encode64(OpenSSL::HMAC.digest(digest, key, str)).gsub(/\n/, '')
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end
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def self.verify?(signature, timestamp)
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content = "#{AliyunVod.callback_url}|#{timestamp}|#{AliyunVod.signature_key}"
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our_signature = Digest::MD5.hexdigest(content)
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ActiveSupport::SecurityUtils.secure_compare(signature, our_signature)
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end
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def self.params_to_string(params)
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params.sort.map { |k, v| "#{percent_encode(k)}=#{percent_encode(v)}" }.join('&')
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end
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def self.percent_encode(str)
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return '' if str.blank?
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CGI::escape(str.to_s).gsub(/\+/,'%20').gsub(/\*/,'%2A').gsub(/%7E/,'~')
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end
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def self.format_params(params)
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params.each_with_object({}) do |arr, obj|
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obj[arr[0]] = arr[1].is_a?(Hash) ? parse_hash_to_str(arr[1]) : arr[1]
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end
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end
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def self.parse_hash_to_str(hash)
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hash.each_with_object({}) do |h, obj|
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obj[h[0]] = h[1].is_a?(Hash) ? parse_hash_to_str(h[1].clone) : h[1].to_s
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end.to_json
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end
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end
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