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package hashleaf
import (
"crypto/ed25519"
"fmt"
"git.sigsum.org/sigsum-go/pkg/hex"
"git.sigsum.org/sigsum-go/pkg/types"
"git.sigsum.org/sigsum-tools-go/internal/util"
)
func Main(_ []string, optPriv string, optShardHint uint64) error {
data, err := util.BytesFromStdin()
if err != nil {
return fmt.Errorf("sign: %v", err)
}
priv, err := util.SignerFromHex(optPriv)
if err != nil {
return fmt.Errorf("sign: %v", err)
}
preimage := types.HashFn(data)
stm := types.Statement{
ShardHint: optShardHint,
Checksum: *types.HashFn(preimage[:]),
}
sig, err := stm.Sign(priv)
if err != nil {
fmt.Errorf("sign: %v", err)
}
leaf := types.Leaf{
Statement: stm,
Signature: *sig,
KeyHash: *types.HashFn(priv.Public().(ed25519.PublicKey)[:]),
}
lh := types.LeafHash(leaf.ToBinary())
fmt.Printf("%s\n", hex.Serialize(lh[:]))
return nil
}
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