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Add KnownHost.Write function

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This commit is contained in:
adnano 2020-09-25 20:55:37 -04:00
parent be55224f89
commit 4a95fe4a90
1 changed files with 17 additions and 18 deletions
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35
tofu.go
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@ -33,25 +33,16 @@ func (k KnownHosts) Has(hostname string, cert *x509.Certificate) bool {
return false return false
} }
// KnownHost represents a known host.
type KnownHost struct {
Hostname string // e.g. gemini.circumlunar.space
Algorithm string // fingerprint algorithm e.g. SHA-512
Fingerprint string // fingerprint in hexadecimal, with ':' between each octet
Expires int64 // unix time of certificate notAfter date
}
// ParseKnownHosts parses and returns a list of known hosts from the provided io.Reader. // ParseKnownHosts parses and returns a list of known hosts from the provided io.Reader.
func ParseKnownHosts(r io.Reader) (KnownHosts, error) { // Invalid lines are ignored.
hosts := []KnownHost{} func ParseKnownHosts(r io.Reader) (hosts KnownHosts) {
scanner := bufio.NewScanner(r) scanner := bufio.NewScanner(r)
for scanner.Scan() { for scanner.Scan() {
text := scanner.Text() text := scanner.Text()
parts := strings.Split(text, " ") parts := strings.Split(text, " ")
if len(parts) < 4 { if len(parts) < 4 {
return nil, ErrInvalidKnownHosts continue
} }
hostname := parts[0] hostname := parts[0]
@ -59,7 +50,7 @@ func ParseKnownHosts(r io.Reader) (KnownHosts, error) {
fingerprint := parts[2] fingerprint := parts[2]
expires, err := strconv.ParseInt(parts[3], 10, 0) expires, err := strconv.ParseInt(parts[3], 10, 0)
if err != nil { if err != nil {
return nil, ErrInvalidKnownHosts continue
} }
hosts = append(hosts, KnownHost{ hosts = append(hosts, KnownHost{
@ -69,13 +60,21 @@ func ParseKnownHosts(r io.Reader) (KnownHosts, error) {
Expires: expires, Expires: expires,
}) })
} }
return
return hosts, nil
} }
// AppendKnownHost appends the host to the provided io.Writer. // KnownHost represents a known host.
func AppendKnownHost(host KnownHost, w io.Writer) error { type KnownHost struct {
return nil Hostname string // e.g. gemini.circumlunar.space
Algorithm string // fingerprint algorithm e.g. SHA-512
Fingerprint string // fingerprint in hexadecimal, with ':' between each octet
Expires int64 // unix time of certificate notAfter date
}
// Write writes the known host to the provided io.Writer.
func (k KnownHost) Write(w io.Writer) (int, error) {
s := fmt.Sprintf("\n%s %s %s %d", k.Hostname, k.Algorithm, k.Fingerprint, k.Expires)
return w.Write([]byte(s))
} }
// Fingerprint returns the SHA-512 fingerprint of the provided certificate. // Fingerprint returns the SHA-512 fingerprint of the provided certificate.