41 lines
637 B
Go
41 lines
637 B
Go
package main
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import (
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"crypto/x509"
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"encoding/pem"
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"flag"
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"fmt"
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"io/ioutil"
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"os"
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)
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func main() {
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flag.Parse()
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for _, fileName := range flag.Args() {
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data, err := ioutil.ReadFile(fileName)
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if err != nil {
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fmt.Fprintf(os.Stderr, "[!] %s: %v\n", fileName, err)
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continue
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}
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fmt.Printf("[+] %s:\n", fileName)
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rest := data[:]
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for {
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var p *pem.Block
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p, rest = pem.Decode(rest)
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if p == nil {
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break
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}
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cert, err := x509.ParseCertificate(p.Bytes)
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if err != nil {
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fmt.Fprintf(os.Stderr, "[!] %s: %v\n", fileName, err)
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break
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}
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fmt.Printf("\t%+v\n", cert.Subject.CommonName)
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}
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}
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}
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