Implements a subset of PKCS#7/Cryptographic Message Syntax (rfc2315, rfc5652)
Switch branches/tags
Clone or download
Pull request Compare This branch is 55 commits ahead, 12 commits behind fullsailor:master.
Fetching latest commit…
Cannot retrieve the latest commit at this time.
Permalink
Type Name Latest commit message Commit time
Failed to load latest commit information.
.gitignore
.travis.yml
LICENSE
Makefile
README.md
ber.go
ber_test.go
decrypt.go
decrypt_test.go
encrypt.go
encrypt_test.go
pkcs7.go
pkcs7_test.go
sign.go
sign_test.go
verify.go
verify_test.go

README.md

pkcs7

GoDoc Build Status

pkcs7 implements parsing and creating signed and enveloped messages.

package main

import (
	"bytes"
	"crypto/rsa"
	"crypto/x509"
	"encoding/pem"
	"fmt"
	"os"

    "go.mozilla.org/pkcs7"
)

func SignAndDetach(content []byte, cert *x509.Certificate, privkey *rsa.PrivateKey) (signed []byte, err error) {
	toBeSigned, err := NewSignedData(content)
	if err != nil {
		err = fmt.Errorf("Cannot initialize signed data: %s", err)
		return
	}
	if err = toBeSigned.AddSigner(cert, privkey, SignerInfoConfig{}); err != nil {
		err = fmt.Errorf("Cannot add signer: %s", err)
		return
	}

	// Detach signature, omit if you want an embedded signature
	toBeSigned.Detach()

	signed, err = toBeSigned.Finish()
	if err != nil {
		err = fmt.Errorf("Cannot finish signing data: %s", err)
		return
	}

	// Verify the signature
	pem.Encode(os.Stdout, &pem.Block{Type: "PKCS7", Bytes: signed})
	p7, err := pkcs7.Parse(signed)
	if err != nil {
		err = fmt.Errorf("Cannot parse our signed data: %s", err)
		return
	}

	// since the signature was detached, reattach the content here
	p7.Content = content

	if bytes.Compare(content, p7.Content) != 0 {
		err = fmt.Errorf("Our content was not in the parsed data:\n\tExpected: %s\n\tActual: %s", content, p7.Content)
		return
	}
	if err = p7.Verify(); err != nil {
		err = fmt.Errorf("Cannot verify our signed data: %s", err)
		return
	}

	return signed, nil
}

Credits

This is a fork of fullsailor/pkcs7