25 lines
702 B
Go
25 lines
702 B
Go
|
package server
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
nixhash "github.com/nix-community/go-nix/pkg/hash"
|
||
|
|
)
|
||
|
|
|
||
|
|
// parseNarHashFromUrl parses a nixbase32 string representing a sha256 NarHash
|
||
|
|
// and returns a nixhash.Hash when it was able to parse, or an error.
|
||
|
|
func parseNarHashFromUrl(narHashFromUrl string) (*nixhash.Hash, error) {
|
||
|
|
// peek at the length. If it's 52 characters, assume sha256,
|
||
|
|
// if it's something else, this is an error.
|
||
|
|
l := len(narHashFromUrl)
|
||
|
|
if l != 52 {
|
||
|
|
return nil, fmt.Errorf("invalid length of narHash: %v", l)
|
||
|
|
}
|
||
|
|
|
||
|
|
nixHash, err := nixhash.ParseNixBase32("sha256:" + narHashFromUrl)
|
||
|
|
if err != nil {
|
||
|
|
return nil, fmt.Errorf("unable to parse nixbase32 hash: %w", err)
|
||
|
|
}
|
||
|
|
|
||
|
|
return nixHash, nil
|
||
|
|
}
|