60 lines
1.9 KiB
Go
60 lines
1.9 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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// signFile reads the contents of an input file and signs it (in armored format)
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// with the key provided, placing the signature into the output file.
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package build
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import (
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"bytes"
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"fmt"
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"os"
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"golang.org/x/crypto/openpgp"
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)
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// PGPSignFile parses a PGP private key from the specified string and creates a
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// signature file into the output parameter of the input file.
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//
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// Note, this method assumes a single key will be container in the pgpkey arg,
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// furthermore that it is in armored format.
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func PGPSignFile(input string, output string, pgpkey string) error {
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// Parse the keyring and make sure we only have a single private key in it
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keys, err := openpgp.ReadArmoredKeyRing(bytes.NewBufferString(pgpkey))
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if err != nil {
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return err
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}
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if len(keys) != 1 {
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return fmt.Errorf("key count mismatch: have %d, want %d", len(keys), 1)
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}
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// Create the input and output streams for signing
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in, err := os.Open(input)
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if err != nil {
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return err
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}
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defer in.Close()
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out, err := os.Create(output)
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if err != nil {
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return err
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}
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defer out.Close()
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// Generate the signature and return
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return openpgp.ArmoredDetachSign(out, keys[0], in, nil)
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}
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