18 lines
340 B
Go
18 lines
340 B
Go
package cryptography
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import (
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"crypto/sha256"
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"io"
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"golang.org/x/crypto/hkdf"
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)
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func DeriveKey(secret, salt, info []byte, length int) ([]byte, error) {
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hkdfReader := hkdf.New(sha256.New, secret, salt, info)
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key := make([]byte, length)
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if _, err := io.ReadFull(hkdfReader, key); err != nil {
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return nil, err
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}
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return key, nil
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}
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