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cacaret.go
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cacaret.go
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package certifi
import (
"crypto/x509"
_ "embed"
"encoding/pem"
"fmt"
"sync"
)
//go:generate go run ./cmd/download --out cacert.pem
//go:embed cacert.pem
var certsBytes []byte
var (
parseCertsOnce sync.Once
parsedCerts []*x509.Certificate
)
func certs() []*x509.Certificate {
parseCertsOnce.Do(func() {
parsedCerts, _ = parseCerts()
})
return parsedCerts
}
func parseCerts() ([]*x509.Certificate, error) {
var out []*x509.Certificate
rest := certsBytes
for {
if len(rest) == 0 {
break
}
var block *pem.Block
block, rest = pem.Decode(rest)
if block == nil {
break
}
if block.Type != "CERTIFICATE" || len(block.Headers) != 0 {
continue
}
cert, err := x509.ParseCertificate(block.Bytes)
if err != nil {
return nil, fmt.Errorf("unable to parse certificate from block %q: %w", string(block.Bytes), err)
}
out = append(out, cert)
}
return out, nil
}