From 72c8492ee1bd07d5960c9920e51b7addac11b806 Mon Sep 17 00:00:00 2001
From: Rasmus Dahlberg <rasmus.dahlberg@kau.se>
Date: Fri, 29 Jan 2021 17:38:31 +0100
Subject: removed x509util

We use minimal namespaces instead of X509 certificates.
---
 x509util/x509util.go | 113 ---------------------------------------------------
 1 file changed, 113 deletions(-)
 delete mode 100644 x509util/x509util.go

(limited to 'x509util/x509util.go')

diff --git a/x509util/x509util.go b/x509util/x509util.go
deleted file mode 100644
index 57d97ca..0000000
--- a/x509util/x509util.go
+++ /dev/null
@@ -1,113 +0,0 @@
-package x509util
-
-import (
-	"fmt"
-
-	"crypto/ed25519"
-	"crypto/x509"
-	"encoding/pem"
-)
-
-// NewEd25519PrivateKey creates a new Ed25519 private-key from a PEM block
-func NewEd25519PrivateKey(data []byte) (ed25519.PrivateKey, error) {
-	block, rest := pem.Decode(data)
-	if block == nil {
-		return nil, fmt.Errorf("pem block: is empty")
-	}
-	if block.Type != "PRIVATE KEY" {
-		return nil, fmt.Errorf("bad pem block type: %v", block.Type)
-	}
-	if len(rest) != 0 {
-		return nil, fmt.Errorf("pem block: trailing data")
-	}
-
-	key, err := x509.ParsePKCS8PrivateKey(block.Bytes)
-	if err != nil {
-		fmt.Errorf("x509 parser failed: %v", err)
-	}
-	switch t := key.(type) {
-	case ed25519.PrivateKey:
-		return key.(ed25519.PrivateKey), nil
-	default:
-		return nil, fmt.Errorf("unexpected signing key type: %v", t)
-	}
-}
-
-// NewCertificateList parses a block of PEM-encoded X.509 certificates
-func NewCertificateList(rest []byte) ([]*x509.Certificate, error) {
-	var certificates []*x509.Certificate
-	for len(rest) > 0 {
-		var block *pem.Block
-		block, rest = pem.Decode(rest)
-		if block == nil {
-			return nil, fmt.Errorf("no block: probably caused by leading white space")
-		}
-		if block.Type != "CERTIFICATE" {
-			return nil, fmt.Errorf("unexpected pem block type: %v", block.Type)
-		}
-
-		certificate, err := x509.ParseCertificate(block.Bytes)
-		if err != nil {
-			return nil, fmt.Errorf("failed parsing x509 certificate: %v", err)
-		}
-		certificates = append(certificates, certificate)
-	}
-	return certificates, nil
-}
-
-// NewCertPool returns a new cert pool from a list of certificates
-func NewCertPool(certificates []*x509.Certificate) *x509.CertPool {
-	pool := x509.NewCertPool()
-	for _, certificate := range certificates {
-		pool.AddCert(certificate)
-	}
-	return pool
-}
-
-// VerifyChain checks whether the listed certificates are chained such
-// that the first is signed by the second, the second by the third, etc.
-//
-// Note: it is up to the caller to determine whether the final certificate
-// is a valid trust anchor.
-func VerifyChain(chain []*x509.Certificate) error {
-	for i := 0; i < len(chain)-1; i++ {
-		if err := chain[i].CheckSignatureFrom(chain[i+1]); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-// ParseDerChain parses a list of DER-encoded X.509 certificates, such that the
-// first (zero-index) blob is interpretted as an end-entity certificate and
-// the remaining ones as its intermediate CertPool.
-//
-// Note: these are the parameters you will need to use x509.Certificate.Verify()
-// with x509.VerifyOptions that include both a pool of roots and intermediates.
-func ParseDerChain(chain [][]byte) (*x509.Certificate, *x509.CertPool, error) {
-	certificates, err := ParseDerList(chain)
-	if err != nil {
-		return nil, nil, err
-	}
-	if len(certificates) == 0 {
-		return nil, nil, fmt.Errorf("empty certificate chain")
-	}
-	intermediatePool := x509.NewCertPool()
-	for _, certificate := range certificates[1:] {
-		intermediatePool.AddCert(certificate)
-	}
-	return certificates[0], intermediatePool, nil
-}
-
-// ParseDerList parses a list of DER-encoded X.509 certificates
-func ParseDerList(certificates [][]byte) ([]*x509.Certificate, error) {
-	ret := make([]*x509.Certificate, 0, len(certificates))
-	for _, der := range certificates {
-		c, err := x509.ParseCertificate(der)
-		if err != nil {
-			return nil, fmt.Errorf("certificate decoding failed: %v", err)
-		}
-		ret = append(ret, c)
-	}
-	return ret, nil
-}
-- 
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