33 lines
860 B
Go
33 lines
860 B
Go
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package yunzhijia
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import (
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"crypto/hmac"
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"crypto/sha1"
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"encoding/base64"
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"fmt"
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"strings"
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)
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// computeSignature builds the signature string from the callback fields
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// and returns the Base64(HMAC_SHA1(secret, signatureString)).
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//
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// The signature string is formed by joining the following fields in order
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// with commas: robotId, robotName, operatorOpenid, operatorName, time, msgId, content.
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func computeSignature(secret string, msg *callbackMessage) string {
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// Build signature string: field1,field2,...,field7
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parts := []string{
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msg.RobotID,
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msg.RobotName,
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msg.OperatorOpenid,
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msg.OperatorName,
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fmt.Sprintf("%d", msg.Time),
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msg.MsgID,
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msg.Content,
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}
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signatureString := strings.Join(parts, ",")
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mac := hmac.New(sha1.New, []byte(secret))
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mac.Write([]byte(signatureString))
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return base64.StdEncoding.EncodeToString(mac.Sum(nil))
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}
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