Gecko [ 167.86.127.34 ]

Name	Size	Permission
pkix	[ DIR ]	drwxr-xr-x
testdata	[ DIR ]	drwxr-xr-x
cert_pool.go	3.75 KB	-rw-r--r--
example_test.go	5.32 KB	-rw-r--r--
name_constraints_test.go	44.98 KB	-rw-r--r--
pem_decrypt.go	6.5 KB	-rw-r--r--
pem_decrypt_test.go	8.92 KB	-rw-r--r--
pkcs1.go	4.64 KB	-rw-r--r--
pkcs8.go	4.36 KB	-rw-r--r--
pkcs8_test.go	8.05 KB	-rw-r--r--
root.go	483 B	-rw-r--r--
root_aix.go	290 B	-rw-r--r--
root_bsd.go	518 B	-rw-r--r--
root_cgo_darwin.go	11.47 KB	-rw-r--r--
root_darwin.go	8.24 KB	-rw-r--r--
root_darwin_arm_gen.go	4.54 KB	-rw-r--r--
root_darwin_armx.go	256.1 KB	-rw-r--r--
root_darwin_test.go	4.31 KB	-rw-r--r--
root_js.go	275 B	-rw-r--r--
root_linux.go	684 B	-rw-r--r--
root_nocgo_darwin.go	264 B	-rw-r--r--
root_plan9.go	844 B	-rw-r--r--
root_solaris.go	419 B	-rw-r--r--
root_unix.go	2.16 KB	-rw-r--r--
root_unix_test.go	3.02 KB	-rw-r--r--
root_windows.go	9.98 KB	-rw-r--r--
sec1.go	4.25 KB	-rw-r--r--
sec1_test.go	5.36 KB	-rw-r--r--
test-file.crt	1.9 KB	-rw-r--r--
verify.go	33.48 KB	-rw-r--r--
verify_test.go	88.68 KB	-rw-r--r--
x509.go	81.23 KB	-rw-r--r--
x509_test.go	97.43 KB	-rw-r--r--
x509_test_import.go	1.7 KB	-rw-r--r--

Code Editor : sec1.go

// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package x509

import (
	"crypto/ecdsa"
	"crypto/elliptic"
	"encoding/asn1"
	"errors"
	"fmt"
	"math/big"
)

const ecPrivKeyVersion = 1

// ecPrivateKey reflects an ASN.1 Elliptic Curve Private Key Structure.
// References:
//   RFC 5915
//   SEC1 - http://www.secg.org/sec1-v2.pdf
// Per RFC 5915 the NamedCurveOID is marked as ASN.1 OPTIONAL, however in
// most cases it is not.
type ecPrivateKey struct {
	Version       int
	PrivateKey    []byte
	NamedCurveOID asn1.ObjectIdentifier `asn1:"optional,explicit,tag:0"`
	PublicKey     asn1.BitString        `asn1:"optional,explicit,tag:1"`
}

// ParseECPrivateKey parses an EC private key in SEC 1, ASN.1 DER form.
//
// This kind of key is commonly encoded in PEM blocks of type "EC PRIVATE KEY".
func ParseECPrivateKey(der []byte) (*ecdsa.PrivateKey, error) {
	return parseECPrivateKey(nil, der)
}

// MarshalECPrivateKey converts an EC private key to SEC 1, ASN.1 DER form.
//
// This kind of key is commonly encoded in PEM blocks of type "EC PRIVATE KEY".
// For a more flexible key format which is not EC specific, use
// MarshalPKCS8PrivateKey.
func MarshalECPrivateKey(key *ecdsa.PrivateKey) ([]byte, error) {
	oid, ok := oidFromNamedCurve(key.Curve)
	if !ok {
		return nil, errors.New("x509: unknown elliptic curve")
	}

return marshalECPrivateKeyWithOID(key, oid)
}

// marshalECPrivateKey marshals an EC private key into ASN.1, DER format and
// sets the curve ID to the given OID, or omits it if OID is nil.
func marshalECPrivateKeyWithOID(key *ecdsa.PrivateKey, oid asn1.ObjectIdentifier) ([]byte, error) {
	privateKeyBytes := key.D.Bytes()
	paddedPrivateKey := make([]byte, (key.Curve.Params().N.BitLen()+7)/8)
	copy(paddedPrivateKey[len(paddedPrivateKey)-len(privateKeyBytes):], privateKeyBytes)

return asn1.Marshal(ecPrivateKey{
		Version:       1,
		PrivateKey:    paddedPrivateKey,
		NamedCurveOID: oid,
		PublicKey:     asn1.BitString{Bytes: elliptic.Marshal(key.Curve, key.X, key.Y)},
	})
}

// parseECPrivateKey parses an ASN.1 Elliptic Curve Private Key Structure.
// The OID for the named curve may be provided from another source (such as
// the PKCS8 container) - if it is provided then use this instead of the OID
// that may exist in the EC private key structure.
func parseECPrivateKey(namedCurveOID *asn1.ObjectIdentifier, der []byte) (key *ecdsa.PrivateKey, err error) {
	var privKey ecPrivateKey
	if _, err := asn1.Unmarshal(der, &privKey); err != nil {
		if _, err := asn1.Unmarshal(der, &pkcs8{}); err == nil {
			return nil, errors.New("x509: failed to parse private key (use ParsePKCS8PrivateKey instead for this key format)")
		}
		if _, err := asn1.Unmarshal(der, &pkcs1PrivateKey{}); err == nil {
			return nil, errors.New("x509: failed to parse private key (use ParsePKCS1PrivateKey instead for this key format)")
		}
		return nil, errors.New("x509: failed to parse EC private key: " + err.Error())
	}
	if privKey.Version != ecPrivKeyVersion {
		return nil, fmt.Errorf("x509: unknown EC private key version %d", privKey.Version)
	}

var curve elliptic.Curve
	if namedCurveOID != nil {
		curve = namedCurveFromOID(*namedCurveOID)
	} else {
		curve = namedCurveFromOID(privKey.NamedCurveOID)
	}
	if curve == nil {
		return nil, errors.New("x509: unknown elliptic curve")
	}

k := new(big.Int).SetBytes(privKey.PrivateKey)
	curveOrder := curve.Params().N
	if k.Cmp(curveOrder) >= 0 {
		return nil, errors.New("x509: invalid elliptic curve private key value")
	}
	priv := new(ecdsa.PrivateKey)
	priv.Curve = curve
	priv.D = k

privateKey := make([]byte, (curveOrder.BitLen()+7)/8)

// Some private keys have leading zero padding. This is invalid
	// according to [SEC1], but this code will ignore it.
	for len(privKey.PrivateKey) > len(privateKey) {
		if privKey.PrivateKey[0] != 0 {
			return nil, errors.New("x509: invalid private key length")
		}
		privKey.PrivateKey = privKey.PrivateKey[1:]
	}

// Some private keys remove all leading zeros, this is also invalid
	// according to [SEC1] but since OpenSSL used to do this, we ignore
	// this too.
	copy(privateKey[len(privateKey)-len(privKey.PrivateKey):], privKey.PrivateKey)
	priv.X, priv.Y = curve.ScalarBaseMult(privateKey)

return priv, nil
}

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Code Editor : sec1.go