35 lines
962 B
Go
35 lines
962 B
Go
package keys
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import (
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"encoding/hex"
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"git.wisehodl.dev/jay/go-roots/errors"
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"github.com/decred/dcrd/dcrec/secp256k1/v4"
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)
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// GeneratePrivateKey generates a new, random secp256k1 private key and returns
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// it as a 64-character, lowercase hexadecimal string.
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func GeneratePrivateKey() (string, error) {
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sk, err := secp256k1.GeneratePrivateKey()
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if err != nil {
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return "", err
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}
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skBytes := sk.Serialize()
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return hex.EncodeToString(skBytes), nil
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}
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// GetPublicKey derives the public key from a private key hex string
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// and returns the x-coordinate as 64 lowercase hex characters.
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func GetPublicKey(privateKeyHex string) (string, error) {
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if len(privateKeyHex) != 64 {
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return "", errors.MalformedPrivKey
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}
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skBytes, err := hex.DecodeString(privateKeyHex)
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if err != nil {
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return "", errors.MalformedPrivKey
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}
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pk := secp256k1.PrivKeyFromBytes(skBytes).PubKey()
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pkBytes := pk.SerializeCompressed()[1:]
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return hex.EncodeToString(pkBytes), nil
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}
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