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54 lines
1.7 KiB
54 lines
1.7 KiB
package salty
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import (
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"bufio"
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"encoding/base64"
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"fmt"
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"io"
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"strings"
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"time"
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"github.com/keys-pub/keys"
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)
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const privateKeySizeLimit = 1 << 8 // 256 bytes
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// GenerateKeys creates a new pair of Ed25519 keys and writes the Private Key
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// to the `out io.Writer` and returns the Private and Public Keys.
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// The Private Key written to `out` is Base64 encoded.
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func GenerateKeys(out io.Writer) (*keys.EdX25519Key, string) {
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k := keys.GenerateEdX25519Key()
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fmt.Fprintf(out, "# created: %s\n", time.Now().Format(time.RFC3339))
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fmt.Fprintf(out, "# public key: %s\n", k.PublicKey().ID().String())
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fmt.Fprintf(out, "%s\n", base64.StdEncoding.EncodeToString(k.Private()))
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return k, k.PublicKey().ID().String()
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}
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// ParseIdentity parses the Salty Identity file given by `r io.Reader` which has a
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// line-oriented format where comments (lines beginning with a #) and the and blank
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// lines are ignored and the private key is the first non-comment / non-blank line.
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// The Private Key is a Base64 decoded.
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// This returns the parsed Ed25519 key on success or nil key and error if it fails.
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func ParseIdentity(r io.Reader) (*keys.EdX25519Key, error) {
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scanner := bufio.NewScanner(io.LimitReader(r, privateKeySizeLimit))
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var n int
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for scanner.Scan() {
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line := scanner.Text()
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n++
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if strings.HasPrefix(line, "#") || line == "" {
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continue
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}
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bs, err := base64.StdEncoding.DecodeString(line)
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if err != nil {
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return nil, fmt.Errorf("error at line %d: %v", n, err)
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}
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return keys.NewEdX25519KeyFromPrivateKey(keys.Bytes64(bs)), nil
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}
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if err := scanner.Err(); err != nil {
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return nil, fmt.Errorf("failed to read identity file: %v", err)
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}
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return nil, fmt.Errorf("no key found")
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}
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