77 lines
1.7 KiB
Go
77 lines
1.7 KiB
Go
package main
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import (
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"crypto"
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"encoding/base64"
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"flag"
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"fmt"
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"io/ioutil"
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"git.zero-knowledge.org/gibheer/pki"
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)
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func VerifyInput(args []string) error {
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fs := flag.NewFlagSet("pkictl verify-input", flag.ExitOnError)
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flagPublic := fs.String("public-key", "", "path to the public key or read from stdin")
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flagInput := fs.String("input", "stdin", "path to the message or stdin")
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flagSignature := fs.String("signature", "", "the signature to check the message against")
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fs.Parse(args)
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sig, err := base64.StdEncoding.DecodeString(*flagSignature)
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if err != nil {
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return err
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}
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in, err := openInput(*flagInput)
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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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msg, err := ioutil.ReadAll(in)
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if err != nil {
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return err
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}
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pub_raw, err := openInput(*flagPublic)
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if err != nil {
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return err
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}
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defer pub_raw.Close()
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pem, err := parseFile(pub_raw)
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if err != nil {
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return err
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}
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if len(pem) > 1 {
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return fmt.Errorf("too many objects in public key file")
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}
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if len(pem[pki.PemLabelPublic]) > 1 {
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return fmt.Errorf("too many public keys found")
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}
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public, err := loadPublicKey(pem[pki.PemLabelPublic][0])
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if err != nil {
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return err
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}
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valid, err := public.Verify(msg, sig, crypto.SHA256)
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if valid {
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fmt.Println("valid")
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return nil
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}
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fmt.Println("invalid")
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return err
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}
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func loadPublicKey(raw_pu []byte) (pki.PublicKey, error) {
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if public, err := pki.LoadPublicKeyEd25519(raw_pu); err != nil {
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return public, nil
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}
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if public, err := pki.LoadPublicKeyEcdsa(raw_pu); err == nil {
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return public, nil
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}
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if public, err := pki.LoadPublicKeyRsa(raw_pu); err == nil {
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return public, nil
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}
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return nil, fmt.Errorf("no valid public key found")
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}
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