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38 lines
747 B
Go
38 lines
747 B
Go
package examples
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import (
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"crypto/hmac"
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"crypto/sha256"
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"encoding/base64"
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"encoding/hex"
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"fmt"
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"log"
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)
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const (
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key = "943b421c9eb07c830af81030552c86009268de4e532ba2ee2eab8247c6da0881"
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salt = "520f986b998545b4785e0defbc4f3c1203f22de2374a3d53cb7a7fe9fea309c5"
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)
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func SignURL() {
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var keyBin, saltBin []byte
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var err error
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if keyBin, err = hex.DecodeString(key); err != nil {
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log.Fatal(err)
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}
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if saltBin, err = hex.DecodeString(salt); err != nil {
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log.Fatal(err)
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}
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path := "/rs:fit:300:300/plain/http://img.example.com/pretty/image.jpg"
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mac := hmac.New(sha256.New, keyBin)
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mac.Write(saltBin)
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mac.Write([]byte(path))
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signature := base64.RawURLEncoding.EncodeToString(mac.Sum(nil))
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fmt.Printf("/%s%s", signature, path)
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}
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