23 lines
499 B
Go
23 lines
499 B
Go
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package hkdf
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import (
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"crypto/sha256"
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"golang.org/x/crypto/hkdf"
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)
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func DeriveAESKeyFromLongKeyAndInfo(shared, info []byte) ([]byte, error) {
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// Create reader for HKDF
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hash := sha256.New
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salt := []byte("EIZBq3CdxfeaGxZ2Zj7QIIhExgbhkdhDW4ePrDheEaEFmzRYdJqrYnddAGk5pqWq")
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// Contextual information
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hkdf := hkdf.New(hash, shared, salt, info)
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// Generate and return the key
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aesKey := make([]byte, 32)
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if _, err := hkdf.Read(aesKey); err != nil {
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return nil, err
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}
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return aesKey, nil
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}
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