//you need set packet before encode
func (a *PasswordAVP) Encode() (b []byte, err error) {
m := crypto.Hash(crypto.MD5).New()
m.Write(a.packet.Secret)
m.Write(a.packet.Authenticator[:])
md := m.Sum(nil)
if len(a.Value) > 128 {
return nil, fmt.Errorf("[PasswordAVP.Encode] len(data)[%d]>128", len(a.Value))
}
inPassLen := len(a.Value) / 16 * 16
if len(a.Value)%16 != 0 {
inPassLen += 16
}
pass := make([]byte, inPassLen)
outPass := make([]byte, inPassLen)
copy(pass, a.Value)
blockNum := inPassLen / 16
for i := 0; i < blockNum; i++ {
for j := 0; j < 16; j++ {
outPass[i*16+j] = pass[i*16+j] ^ md[j]
}
m := crypto.Hash(crypto.MD5).New()
m.Write(a.packet.Secret)
m.Write(outPass[i*16 : i*16+16])
md = m.Sum(nil)
}
return encodeWithByteSlice(AVPTypeUserPassword, outPass)
}
func avpPassword(p *Packet, typ AVPType, data []byte) (avp AVP, err error) {
fmt.Printf("%#v\n", data)
if len(data) < 16 {
return nil, fmt.Errorf("[avpPassword] len(data)[%d]<16", len(data))
}
if len(data) > 128 {
return nil, fmt.Errorf("[avpPassword] len(data)[%d]>128", len(data))
}
//Decode password. XOR against md5(p.server.secret+Authenticator)
m := crypto.Hash(crypto.MD5).New()
m.Write(p.Secret)
m.Write(p.Authenticator[:])
md := m.Sum(nil)
pass := append([]byte(nil), data...)
blockNum := len(pass) / 16
if len(pass)%16 != 0 {
return nil, fmt.Errorf("[avpPassword] blockNum[%d]%%16!=0", blockNum)
}
outputPass := make([]byte, len(pass))
for i := 0; i < blockNum; i++ {
for j := 0; j < 16; j++ {
outputPass[i*16+j] = pass[i*16+j] ^ md[j]
}
m := crypto.Hash(crypto.MD5).New()
m.Write(p.Secret)
m.Write(pass[i*16 : i*16+16])
md = m.Sum(nil)
}
outputPass = bytes.TrimRight(outputPass, string([]rune{0}))
avpP := &PasswordAVP{
Value: string(outputPass),
}
avpP.SetPacket(p)
return avpP, nil
}
func fetchCert(address string) (*cert, error) {
//fetch cert over network
addr, err := net.ResolveTCPAddr("tcp", address)
if err != nil {
return nil, err
}
netCon, err := net.DialTCP("tcp", nil, addr)
if err != nil {
return nil, err
}
host := strings.Split(address, ":")[0]
config := &tls.Config{
NextProtos: []string{"http"},
ServerName: host,
InsecureSkipVerify: true,
}
log.Println("getting cert for: ", host)
client := tls.Client(netCon, config)
err = client.Handshake()
if err != nil {
return nil, err
}
state := client.ConnectionState()
if len(state.PeerCertificates) == 0 {
return nil, errors.New("no cert recieved from host")
}
for i := range state.PeerCertificates {
log.Println(state.PeerCertificates[i].Subject)
certRaw := state.PeerCertificates[i].Raw
sha := crypto.Hash(crypto.SHA1).New()
sha.Write(certRaw)
myFP := hex.EncodeToString(sha.Sum(nil))
myFP = fingerPrintStr(myFP).String()
log.Println(myFP)
log.Println("---")
}
certRaw := state.PeerCertificates[0].Raw
sha := crypto.Hash(crypto.SHA1).New()
sha.Write(certRaw)
client.Close()
netCon.Close()
c := &cert{state.PeerCertificates[0], sha.Sum(nil)}
return c, nil
}
func prfAndHashForVersion(version uint16, suite *cipherSuite) (func(result, secret, label, seed []byte), crypto.Hash) {
switch version {
case VersionSSL30:
return prf30, crypto.Hash(0)
case VersionTLS10, VersionTLS11:
return prf10, crypto.Hash(0)
case VersionTLS12:
if suite.flags&suiteSHA384 != 0 {
return prf12(sha512.New384), crypto.SHA384
}
return prf12(sha256.New), crypto.SHA256
default:
panic("unknown version")
}
}
func (r NotaryResponse) signResponse(response []byte) ([]byte, error) {
hash := crypto.Hash(crypto.SHA1).New()
hash.Write(response)
hashed := hash.Sum(nil)
return rsa.SignPKCS1v15(rand.Reader, r.privateKey, crypto.SHA1, hashed)
}
// Sign signs the given message with priv.
// Ed25519 performs two passes over messages to be signed and therefore cannot
// handle pre-hashed messages. Thus opts.HashFunc() must return zero to
// indicate the message hasn't been hashed. This can be achieved by passing
// crypto.Hash(0) as the value for opts.
func (priv PrivateKey) Sign(rand io.Reader, message []byte, opts crypto.SignerOpts) (signature []byte, err error) {
if opts.HashFunc() != crypto.Hash(0) {
return nil, errors.New("ed25519: cannot sign hashed message")
}
return Sign(priv, message), nil
}
func getHashForOID(oid asn1.ObjectIdentifier) (crypto.Hash, error) {
switch {
case oid.Equal(oidDigestAlgorithmSHA1):
return crypto.SHA1, nil
}
return crypto.Hash(0), ErrUnsupportedAlgorithm
}
func (p *Packet) Encode(b []byte) (n int, ret []byte, err error) {
b[0] = uint8(p.Code)
b[1] = uint8(p.Identifier)
copy(b[4:20], p.Authenticator[:])
written := 20
bb := b[20:]
for i, _ := range p.AVPs {
n, err = p.AVPs[i].Encode(bb)
written += n
if err != nil {
return written, nil, err
}
bb = bb[n:]
}
//check if written too big.
binary.BigEndian.PutUint16(b[2:4], uint16(written))
// fix up the authenticator
hasher := crypto.Hash(crypto.MD5).New()
hasher.Write(b[:written])
hasher.Write([]byte(p.server.secret))
copy(b[4:20], hasher.Sum(nil))
return written, b, err
}
// this is ugly.
func getHashName(h hash.Hash) string {
hn := reflect.TypeOf(h).String()
fields := strings.Split(hn, ".")
var hashName string
hashName = fields[0]
if strings.HasPrefix(fields[0], "*") {
hashName = fields[0][1:]
}
elem := reflect.ValueOf(h).Elem()
switch hashName {
case "sha256":
f := elem.FieldByName("is224")
if f.IsValid() {
if f.Bool() {
hashName = "sha224"
}
}
break
case "sha512":
f := elem.FieldByName("function")
if f.IsValid() {
if crypto.Hash(f.Uint()) == crypto.SHA384 {
hashName = "sha384"
}
}
break
}
return hashName
}
// appleResponse takes an Apple-Challenge header value, and constructs a response for it.
// To derive the response, the IP and MAC of the connection are needed, so the local address
// has to be passed in.
func appleResponse(challenge string, addr net.Addr) (c64 string, err error) {
// iTunes seems to not pad things. Let's fix that.
p64 := base64pad(challenge)
ptext, err := base64.StdEncoding.DecodeString(p64)
if err != nil {
return
}
ptext = append(ptext, GetIP(addr)...)
ptext = append(ptext, GetMAC(addr)...)
for len(ptext) < 0x20 {
ptext = append(ptext, 0)
}
ctext, err := rsa.SignPKCS1v15(nil, rsaPrivKey, crypto.Hash(0), ptext)
if err != nil {
return
}
c64 = base64.StdEncoding.EncodeToString(ctext)
// We should respond in kind to iTunes
if len(p64) != len(challenge) {
c64 = base64unpad(c64)
}
return
}
// ParseRequest parses an OCSP request in DER form. It only supports
// requests for a single certificate. Signed requests are not supported.
// If a request includes a signature, it will result in a ParseError.
func ParseRequest(bytes []byte) (*Request, error) {
var req ocspRequest
rest, err := asn1.Unmarshal(bytes, &req)
if err != nil {
return nil, err
}
if len(rest) > 0 {
return nil, ParseError("trailing data in OCSP request")
}
if len(req.TBSRequest.RequestList) == 0 {
return nil, ParseError("OCSP request contains no request body")
}
innerRequest := req.TBSRequest.RequestList[0]
hashFunc := getHashAlgorithmFromOID(innerRequest.Cert.HashAlgorithm.Algorithm)
if hashFunc == crypto.Hash(0) {
return nil, ParseError("OCSP request uses unknown hash function")
}
return &Request{
HashAlgorithm: hashFunc,
IssuerNameHash: innerRequest.Cert.NameHash,
IssuerKeyHash: innerRequest.Cert.IssuerKeyHash,
SerialNumber: innerRequest.Cert.SerialNumber,
}, nil
}
// Restore resets the digest to the given state.
func (d *digest) Restore(state []byte) error {
decoder := gob.NewDecoder(bytes.NewReader(state))
var function uint
// We decode this way so that we do not have
// to export these fields of the digest struct.
vals := []interface{}{
&d.h, &d.x, &d.nx, &d.len, &function,
}
for _, val := range vals {
if err := decoder.Decode(val); err != nil {
return err
}
}
switch crypto.Hash(function) {
case crypto.SHA224:
d.is224 = true
case crypto.SHA256:
d.is224 = false
default:
return resumable.ErrBadState
}
return nil
}
// TODO(rlb): This is not taken from crypto/x509, but it's of the same general form.
func getHashAlgorithmFromOID(target asn1.ObjectIdentifier) crypto.Hash {
for hash, oid := range hashOIDs {
if oid.Equal(target) {
return hash
}
}
return crypto.Hash(0)
}
func TestResultUnsupportedAlgorithmWillCauseNewHmacAuthToPanic(t *testing.T) {
defer func() {
err := recover()
assert.Equal(t, err,
"hmacauth: hash algorithm #0 is unavailable")
}()
NewHmacAuth(crypto.Hash(0), nil, "", nil)
}
func TestUnsupportedHashAlgorithm(t *testing.T) {
algorithm, err := DigestNameToCryptoHash("unsupported")
assert.NotEqual(t, err, nil)
assert.Equal(t, err.Error(),
"hmacauth: hash algorithm not supported: unsupported")
assert.Equal(t, algorithm, crypto.Hash(0))
assert.Equal(t, algorithm.Available(), false)
}
// hashForServerKeyExchange hashes the given slices and returns their digest
// and the identifier of the hash function used. The sigAndHash argument is
// only used for >= TLS 1.2 and precisely identifies the hash function to use.
func hashForServerKeyExchange(sigAndHash signatureAndHash, version uint16, slices ...[]byte) ([]byte, crypto.Hash, error) {
if version >= VersionTLS12 {
if !isSupportedSignatureAndHash(sigAndHash, supportedSignatureAlgorithms) {
return nil, crypto.Hash(0), errors.New("tls: unsupported hash function used by peer")
}
hashFunc, err := lookupTLSHash(sigAndHash.hash)
if err != nil {
return nil, crypto.Hash(0), err
}
h := hashFunc.New()
for _, slice := range slices {
h.Write(slice)
}
digest := h.Sum(nil)
return digest, hashFunc, nil
}
if sigAndHash.signature == signatureECDSA {
return sha1Hash(slices), crypto.SHA1, nil
}
return md5SHA1Hash(slices), crypto.MD5SHA1, nil
}
func TestUnpaddedSignature(t *testing.T) {
msg := []byte("Thu Dec 19 18:06:16 EST 2013\n")
// This base64 value was generated with:
// % echo Thu Dec 19 18:06:16 EST 2013 > /tmp/msg
// % openssl rsautl -sign -inkey key -out /tmp/sig -in /tmp/msg
//
// Where "key" contains the RSA private key given at the bottom of this
// file.
expectedSig := decodeBase64("pX4DR8azytjdQ1rtUiC040FjkepuQut5q2ZFX1pTjBrOVKNjgsCDyiJDGZTCNoh9qpXYbhl7iEym30BWWwuiZg==")
sig, err := SignPKCS1v15(nil, rsaPrivateKey, crypto.Hash(0), msg)
if err != nil {
t.Fatalf("SignPKCS1v15 failed: %s", err)
}
if !bytes.Equal(sig, expectedSig) {
t.Fatalf("signature is not expected value: got %x, want %x", sig, expectedSig)
}
if err := VerifyPKCS1v15(&rsaPrivateKey.PublicKey, crypto.Hash(0), msg, sig); err != nil {
t.Fatalf("signature failed to verify: %s", err)
}
}
// IssueToken creates a new Token for the authenticated user. Callers should
// prefill the Token with whatever values they like and leave zero values
// to be set.
// The generated token will also be persisted and can be handed to the client
// with no more handling.
func (p *Passenger) IssueToken(ctx context.Context, token *model.Token) (string, error) {
now := time.Now()
token.Creation = now
if token.Expiry == (time.Time{}) {
token.Expiry = now.Add(defaultValidity)
} else {
if token.Expiry.Before(now.Add(minValidity)) {
return "", fmt.Errorf("passenger: token must be valid at least %s", minValidity)
}
if token.Expiry.After(now.Add(maxValidity)) {
return "", fmt.Errorf("passenger: token must be valid at most %s", maxValidity)
}
}
// TODO(flowlo): This will reject all scopes for now, as we are not using them.
// As soon as we introduce scopes, this check must be rewritten accordingly.
if len(token.Scopes) > 0 {
return "", fmt.Errorf("passenger: unknown scopes: %s", strings.Join(token.Scopes, ", "))
}
if len(token.Description) > 512 || len(token.Description) < 4 {
return "", fmt.Errorf("passenger: description has bad len %d", len(token.Description))
}
var raw [tokenLength]byte
if _, err := rand.Read(raw[:]); err != nil {
return "", err
}
if token.Hash == 0 {
token.Hash = int(defaultHash)
}
token.Digest = crypto.Hash(token.Hash).New().Sum(raw[:])
// TODO(flowlo): Set token.RemoteAddr.
clone := Passenger{
User: p.User,
Token: token,
}
key, err := clone.Save(ctx)
if err != nil {
return "", err
}
return encodeToken(key, &raw)
}
func (p *Passenger) check(raw []byte) error {
digest := crypto.Hash(p.Token.Hash).New().Sum(raw)
if subtle.ConstantTimeCompare(digest, p.Token.Digest) != 1 {
return ErrDigestMismatch
}
if p.Token.Expiry.Before(time.Now()) {
return ErrTokenExpired
}
return nil
}
func (p *Passenger) check(raw []byte) error {
digest := crypto.Hash(p.AccessToken.Hash).New().Sum(raw)
if !bytes.Equal(digest, p.AccessToken.Digest) {
return ErrDigestMismatch
}
if p.AccessToken.Expiry.Before(time.Now()) {
return ErrTokenExpired
}
return nil
}
// hashForServerKeyExchange hashes the given slices and returns their digest
// and the identifier of the hash function used. The hashFunc argument is only
// used for >= TLS 1.2 and precisely identifies the hash function to use.
func hashForServerKeyExchange(sigType, hashFunc uint8, version uint16, slices ...[]byte) ([]byte, crypto.Hash, error) {
if version >= VersionTLS12 {
switch hashFunc {
case hashSHA256:
return sha256Hash(slices), crypto.SHA256, nil
case hashSHA1:
return sha1Hash(slices), crypto.SHA1, nil
default:
return nil, crypto.Hash(0), errors.New("tls: unknown hash function used by peer")
}
}
if sigType == signatureECDSA || sigType == signatureDSA {
return sha1Hash(slices), crypto.SHA1, nil
}
return md5SHA1Hash(slices), crypto.MD5SHA1, nil
}
func DecodeUserPassword(p *Packet, a *AVP) error {
//Decode password. XOR against md5(p.server.secret+Authenticator)
secAuth := append([]byte(nil), []byte(p.server.secret)...)
secAuth = append(secAuth, p.Authenticator[:]...)
m := crypto.Hash(crypto.MD5).New()
m.Write(secAuth)
md := m.Sum(nil)
pass := a.Value
if len(pass) == 16 {
for i := 0; i < len(pass); i++ {
pass[i] = pass[i] ^ md[i]
}
a.Value = bytes.TrimRight(pass, string([]rune{0}))
return nil
}
return errors.New("not implemented for password > 16")
}
func (r NotaryResponse) VerifySig() (valid bool) {
fpList, err := json.Marshal(r.FingerprintList)
if err != nil {
return false
}
hash := crypto.Hash(crypto.SHA1).New()
hash.Write(fpList)
hashed := hash.Sum(nil)
sig, err := base64.StdEncoding.DecodeString(r.Signature)
if err != nil {
return false
}
err = rsa.VerifyPKCS1v15(r.notary.certificate.PublicKey.(*rsa.PublicKey), crypto.SHA1, hashed, sig)
if err == nil {
return true
}
return false
}
//此方法保证不修改包的内容
func (p *Packet) Encode() (b []byte, err error) {
p = p.Copy()
p.SetAVP(&BinaryAVP{
Type: AVPTypeMessageAuthenticator,
Value: make([]byte, 16),
})
if p.Code == CodeAccessRequest {
_, err := rand.Read(p.Authenticator[:])
if err != nil {
return nil, err
}
}
//TODO request的时候重新计算密码
b, err = p.encodeNoHash()
if err != nil {
return
}
//计算Message-Authenticator这个AVP的值,特殊化处理,Message-Authenticator这个AVP被放在最后面
hasher := hmac.New(crypto.MD5.New, []byte(p.Secret))
hasher.Write(b)
copy(b[len(b)-16:len(b)], hasher.Sum(nil))
// fix up the authenticator
// handle request and response stuff.
// here only handle response part.
switch p.Code {
case CodeAccessRequest:
case CodeAccessAccept, CodeAccessReject, CodeAccessChallenge,
CodeAccountingRequest, CodeAccountingResponse:
//rfc2865 page 15 Response Authenticator
//rfc2866 page 6 Response Authenticator
//rfc2866 page 6 Request Authenticator
hasher := crypto.Hash(crypto.MD5).New()
hasher.Write(b)
hasher.Write([]byte(p.Secret))
copy(b[4:20], hasher.Sum(nil)) //返回值再把Authenticator写回去
default:
return nil, fmt.Errorf("not handle p.Code %d", p.Code)
}
return b, err
}
// ParseTOTPConfig parses a serialised TOTP configuration.
func ParseTOTPConfig(in []byte) (*TOTPConfig, error) {
var size int32
var algo int8
var provider []byte
var config = new(TOTPConfig)
dec := tlv.NewDecoder(in)
err := dec.Decode(&config.Key)
if err != nil {
return nil, errInvalidTOTPConfig
}
err = dec.Decode(&config.Start)
if err != nil {
return nil, errInvalidTOTPConfig
}
err = dec.Decode(&config.Step)
if err != nil {
return nil, errInvalidTOTPConfig
}
err = dec.Decode(&size)
if err != nil {
return nil, errInvalidTOTPConfig
}
config.Size = int(size)
err = dec.Decode(&algo)
if err != nil {
return nil, errInvalidTOTPConfig
}
config.Algo = crypto.Hash(algo)
err = dec.Decode(&provider)
if err != nil {
return nil, errInvalidTOTPConfig
}
config.Provider = string(provider)
return config, nil
}
func (s avpPasswordt) Value(p *Packet, a AVP) interface{} {
if p == nil {
return ""
}
//Decode password. XOR against md5(p.server.secret+Authenticator)
secAuth := append([]byte(nil), []byte(p.Secret)...)
secAuth = append(secAuth, p.Authenticator[:]...)
m := crypto.Hash(crypto.MD5).New()
m.Write(secAuth)
md := m.Sum(nil)
pass := append([]byte(nil), a.Value...)
if len(pass) == 16 {
for i := 0; i < len(pass); i++ {
pass[i] = pass[i] ^ md[i]
}
pass = bytes.TrimRight(pass, string([]rune{0}))
return string(pass)
}
fmt.Println("[GetPassword] warning: not implemented for password > 16")
return ""
}
// New returns a new hash.Hash which calculates the given hash function.
func (h Hash) New() hash.Hash {
return crypto.Hash(h).New()
}
// Size returns the size in bytes of the hash output.
func (h Hash) Size() int {
return crypto.Hash(h).Size()
}
// Available returns if the given hash function is available at runtime.
func (h Hash) Available() bool {
return crypto.Hash(h).Available()
}
var hashOIDs = map[crypto.Hash]asn1.ObjectIdentifier{
crypto.SHA1: asn1.ObjectIdentifier([]int{1, 3, 14, 3, 2, 26}),
crypto.SHA256: asn1.ObjectIdentifier([]int{2, 16, 840, 1, 101, 3, 4, 2, 1}),
crypto.SHA384: asn1.ObjectIdentifier([]int{2, 16, 840, 1, 101, 3, 4, 2, 2}),
crypto.SHA512: asn1.ObjectIdentifier([]int{2, 16, 840, 1, 101, 3, 4, 2, 3}),
}
// TODO(rlb): This is also from crypto/x509, so same comment as AGL's below
var signatureAlgorithmDetails = []struct {
algo x509.SignatureAlgorithm
oid asn1.ObjectIdentifier
pubKeyAlgo x509.PublicKeyAlgorithm
hash crypto.Hash
}{
{x509.MD2WithRSA, oidSignatureMD2WithRSA, x509.RSA, crypto.Hash(0) /* no value for MD2 */},
{x509.MD5WithRSA, oidSignatureMD5WithRSA, x509.RSA, crypto.MD5},
{x509.SHA1WithRSA, oidSignatureSHA1WithRSA, x509.RSA, crypto.SHA1},
{x509.SHA256WithRSA, oidSignatureSHA256WithRSA, x509.RSA, crypto.SHA256},
{x509.SHA384WithRSA, oidSignatureSHA384WithRSA, x509.RSA, crypto.SHA384},
{x509.SHA512WithRSA, oidSignatureSHA512WithRSA, x509.RSA, crypto.SHA512},
{x509.DSAWithSHA1, oidSignatureDSAWithSHA1, x509.DSA, crypto.SHA1},
{x509.DSAWithSHA256, oidSignatureDSAWithSHA256, x509.DSA, crypto.SHA256},
{x509.ECDSAWithSHA1, oidSignatureECDSAWithSHA1, x509.ECDSA, crypto.SHA1},
{x509.ECDSAWithSHA256, oidSignatureECDSAWithSHA256, x509.ECDSA, crypto.SHA256},
{x509.ECDSAWithSHA384, oidSignatureECDSAWithSHA384, x509.ECDSA, crypto.SHA384},
{x509.ECDSAWithSHA512, oidSignatureECDSAWithSHA512, x509.ECDSA, crypto.SHA512},
}
// TODO(rlb): This is also from crypto/x509, so same comment as AGL's below
func signingParamsForPublicKey(pub interface{}, requestedSigAlgo x509.SignatureAlgorithm) (hashFunc crypto.Hash, sigAlgo pkix.AlgorithmIdentifier, err error) {