Created
June 29, 2023 04:44
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Certificates
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package main | |
import ( | |
"crypto" | |
"crypto/rand" | |
"crypto/sha256" | |
"encoding/base64" | |
"fmt" | |
"time" | |
"github.com/github/smimesign/certstore" | |
) | |
func main() { | |
if err := certList(); err != nil { | |
fmt.Printf("Error: %s\n", err) | |
} | |
} | |
func certList() error { | |
store, err := certstore.Open() | |
if err != nil { | |
return fmt.Errorf("opening certstore: %w", err) | |
} | |
defer store.Close() | |
idents, err := store.Identities() | |
if err != nil { | |
return fmt.Errorf("getting identities: %w", err) | |
} | |
for _, ident := range idents { | |
tryIdent(ident) | |
} | |
return nil | |
} | |
func tryIdent(ident certstore.Identity) { | |
defer fmt.Println("\n") | |
crt, err := ident.Certificate() | |
if err != nil { | |
fmt.Printf("Not a cert: %s\n", err) | |
return | |
} | |
fmt.Printf("Subject: %s\nIssuer: %s\n", crt.Subject.String(), crt.Issuer.String()) | |
nonce := time.Now().String() | |
fmt.Printf("msg: %s\n", nonce) | |
signer, err := ident.Signer() | |
if err != nil { | |
fmt.Printf("error getting signer: %s", err) | |
return | |
} | |
// Digest and sign our message. | |
digest := sha256.Sum256([]byte(nonce)) | |
signature, err := signer.Sign(rand.Reader, digest[:], crypto.SHA256) | |
if err != nil { | |
fmt.Printf("error signing: %s", err) | |
return | |
} | |
fmt.Printf("sig: %s\n", base64.StdEncoding.EncodeToString(signature)) | |
} |
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