38 lines
899 B
Go
38 lines
899 B
Go
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package devnet
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import (
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"bytes"
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"crypto/ecdsa"
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"crypto/elliptic"
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"encoding/binary"
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mathrand "math/rand"
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"github.com/libp2p/go-libp2p-core/crypto"
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)
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// DeterministicEcdsaKeyByIndex generates a deterministic ecdsa.PrivateKey from a given index.
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func DeterministicEcdsaKeyByIndex(c elliptic.Curve, idx uint64) *ecdsa.PrivateKey {
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buf := make([]byte, 200)
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binary.LittleEndian.PutUint64(buf, idx)
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worstRNG := bytes.NewBuffer(buf)
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key, err := ecdsa.GenerateKey(c, bytes.NewReader(worstRNG.Bytes()))
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if err != nil {
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panic(err)
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}
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return key
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}
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// DeterministicP2PPrivKeyByIndex generates a deterministic libp2p crypto.PrivateKey from a given index.
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func DeterministicP2PPrivKeyByIndex(idx int64) crypto.PrivKey {
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r := mathrand.New(mathrand.NewSource(int64(idx)))
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priv, _, err := crypto.GenerateKeyPairWithReader(crypto.Ed25519, -1, r)
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if err != nil {
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panic(err)
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}
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return priv
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}
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