[VOL-2193] Create mocks for Kafka Client and Etcd
This commit consists of:
1) A kafka client mock that implements the kafka client interface
under voltha-lib-go/pkg/kafka/client.go
2) An embedded Etcd server that runs in-process and represents an
Etcd server.
Change-Id: I52a36132568e08c596bb4136918bebcb654a3b99
diff --git a/vendor/golang.org/x/crypto/bcrypt/bcrypt.go b/vendor/golang.org/x/crypto/bcrypt/bcrypt.go
new file mode 100644
index 0000000..aeb73f8
--- /dev/null
+++ b/vendor/golang.org/x/crypto/bcrypt/bcrypt.go
@@ -0,0 +1,295 @@
+// Copyright 2011 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 bcrypt implements Provos and Mazières's bcrypt adaptive hashing
+// algorithm. See http://www.usenix.org/event/usenix99/provos/provos.pdf
+package bcrypt // import "golang.org/x/crypto/bcrypt"
+
+// The code is a port of Provos and Mazières's C implementation.
+import (
+ "crypto/rand"
+ "crypto/subtle"
+ "errors"
+ "fmt"
+ "io"
+ "strconv"
+
+ "golang.org/x/crypto/blowfish"
+)
+
+const (
+ MinCost int = 4 // the minimum allowable cost as passed in to GenerateFromPassword
+ MaxCost int = 31 // the maximum allowable cost as passed in to GenerateFromPassword
+ DefaultCost int = 10 // the cost that will actually be set if a cost below MinCost is passed into GenerateFromPassword
+)
+
+// The error returned from CompareHashAndPassword when a password and hash do
+// not match.
+var ErrMismatchedHashAndPassword = errors.New("crypto/bcrypt: hashedPassword is not the hash of the given password")
+
+// The error returned from CompareHashAndPassword when a hash is too short to
+// be a bcrypt hash.
+var ErrHashTooShort = errors.New("crypto/bcrypt: hashedSecret too short to be a bcrypted password")
+
+// The error returned from CompareHashAndPassword when a hash was created with
+// a bcrypt algorithm newer than this implementation.
+type HashVersionTooNewError byte
+
+func (hv HashVersionTooNewError) Error() string {
+ return fmt.Sprintf("crypto/bcrypt: bcrypt algorithm version '%c' requested is newer than current version '%c'", byte(hv), majorVersion)
+}
+
+// The error returned from CompareHashAndPassword when a hash starts with something other than '$'
+type InvalidHashPrefixError byte
+
+func (ih InvalidHashPrefixError) Error() string {
+ return fmt.Sprintf("crypto/bcrypt: bcrypt hashes must start with '$', but hashedSecret started with '%c'", byte(ih))
+}
+
+type InvalidCostError int
+
+func (ic InvalidCostError) Error() string {
+ return fmt.Sprintf("crypto/bcrypt: cost %d is outside allowed range (%d,%d)", int(ic), int(MinCost), int(MaxCost))
+}
+
+const (
+ majorVersion = '2'
+ minorVersion = 'a'
+ maxSaltSize = 16
+ maxCryptedHashSize = 23
+ encodedSaltSize = 22
+ encodedHashSize = 31
+ minHashSize = 59
+)
+
+// magicCipherData is an IV for the 64 Blowfish encryption calls in
+// bcrypt(). It's the string "OrpheanBeholderScryDoubt" in big-endian bytes.
+var magicCipherData = []byte{
+ 0x4f, 0x72, 0x70, 0x68,
+ 0x65, 0x61, 0x6e, 0x42,
+ 0x65, 0x68, 0x6f, 0x6c,
+ 0x64, 0x65, 0x72, 0x53,
+ 0x63, 0x72, 0x79, 0x44,
+ 0x6f, 0x75, 0x62, 0x74,
+}
+
+type hashed struct {
+ hash []byte
+ salt []byte
+ cost int // allowed range is MinCost to MaxCost
+ major byte
+ minor byte
+}
+
+// GenerateFromPassword returns the bcrypt hash of the password at the given
+// cost. If the cost given is less than MinCost, the cost will be set to
+// DefaultCost, instead. Use CompareHashAndPassword, as defined in this package,
+// to compare the returned hashed password with its cleartext version.
+func GenerateFromPassword(password []byte, cost int) ([]byte, error) {
+ p, err := newFromPassword(password, cost)
+ if err != nil {
+ return nil, err
+ }
+ return p.Hash(), nil
+}
+
+// CompareHashAndPassword compares a bcrypt hashed password with its possible
+// plaintext equivalent. Returns nil on success, or an error on failure.
+func CompareHashAndPassword(hashedPassword, password []byte) error {
+ p, err := newFromHash(hashedPassword)
+ if err != nil {
+ return err
+ }
+
+ otherHash, err := bcrypt(password, p.cost, p.salt)
+ if err != nil {
+ return err
+ }
+
+ otherP := &hashed{otherHash, p.salt, p.cost, p.major, p.minor}
+ if subtle.ConstantTimeCompare(p.Hash(), otherP.Hash()) == 1 {
+ return nil
+ }
+
+ return ErrMismatchedHashAndPassword
+}
+
+// Cost returns the hashing cost used to create the given hashed
+// password. When, in the future, the hashing cost of a password system needs
+// to be increased in order to adjust for greater computational power, this
+// function allows one to establish which passwords need to be updated.
+func Cost(hashedPassword []byte) (int, error) {
+ p, err := newFromHash(hashedPassword)
+ if err != nil {
+ return 0, err
+ }
+ return p.cost, nil
+}
+
+func newFromPassword(password []byte, cost int) (*hashed, error) {
+ if cost < MinCost {
+ cost = DefaultCost
+ }
+ p := new(hashed)
+ p.major = majorVersion
+ p.minor = minorVersion
+
+ err := checkCost(cost)
+ if err != nil {
+ return nil, err
+ }
+ p.cost = cost
+
+ unencodedSalt := make([]byte, maxSaltSize)
+ _, err = io.ReadFull(rand.Reader, unencodedSalt)
+ if err != nil {
+ return nil, err
+ }
+
+ p.salt = base64Encode(unencodedSalt)
+ hash, err := bcrypt(password, p.cost, p.salt)
+ if err != nil {
+ return nil, err
+ }
+ p.hash = hash
+ return p, err
+}
+
+func newFromHash(hashedSecret []byte) (*hashed, error) {
+ if len(hashedSecret) < minHashSize {
+ return nil, ErrHashTooShort
+ }
+ p := new(hashed)
+ n, err := p.decodeVersion(hashedSecret)
+ if err != nil {
+ return nil, err
+ }
+ hashedSecret = hashedSecret[n:]
+ n, err = p.decodeCost(hashedSecret)
+ if err != nil {
+ return nil, err
+ }
+ hashedSecret = hashedSecret[n:]
+
+ // The "+2" is here because we'll have to append at most 2 '=' to the salt
+ // when base64 decoding it in expensiveBlowfishSetup().
+ p.salt = make([]byte, encodedSaltSize, encodedSaltSize+2)
+ copy(p.salt, hashedSecret[:encodedSaltSize])
+
+ hashedSecret = hashedSecret[encodedSaltSize:]
+ p.hash = make([]byte, len(hashedSecret))
+ copy(p.hash, hashedSecret)
+
+ return p, nil
+}
+
+func bcrypt(password []byte, cost int, salt []byte) ([]byte, error) {
+ cipherData := make([]byte, len(magicCipherData))
+ copy(cipherData, magicCipherData)
+
+ c, err := expensiveBlowfishSetup(password, uint32(cost), salt)
+ if err != nil {
+ return nil, err
+ }
+
+ for i := 0; i < 24; i += 8 {
+ for j := 0; j < 64; j++ {
+ c.Encrypt(cipherData[i:i+8], cipherData[i:i+8])
+ }
+ }
+
+ // Bug compatibility with C bcrypt implementations. We only encode 23 of
+ // the 24 bytes encrypted.
+ hsh := base64Encode(cipherData[:maxCryptedHashSize])
+ return hsh, nil
+}
+
+func expensiveBlowfishSetup(key []byte, cost uint32, salt []byte) (*blowfish.Cipher, error) {
+ csalt, err := base64Decode(salt)
+ if err != nil {
+ return nil, err
+ }
+
+ // Bug compatibility with C bcrypt implementations. They use the trailing
+ // NULL in the key string during expansion.
+ // We copy the key to prevent changing the underlying array.
+ ckey := append(key[:len(key):len(key)], 0)
+
+ c, err := blowfish.NewSaltedCipher(ckey, csalt)
+ if err != nil {
+ return nil, err
+ }
+
+ var i, rounds uint64
+ rounds = 1 << cost
+ for i = 0; i < rounds; i++ {
+ blowfish.ExpandKey(ckey, c)
+ blowfish.ExpandKey(csalt, c)
+ }
+
+ return c, nil
+}
+
+func (p *hashed) Hash() []byte {
+ arr := make([]byte, 60)
+ arr[0] = '$'
+ arr[1] = p.major
+ n := 2
+ if p.minor != 0 {
+ arr[2] = p.minor
+ n = 3
+ }
+ arr[n] = '$'
+ n++
+ copy(arr[n:], []byte(fmt.Sprintf("%02d", p.cost)))
+ n += 2
+ arr[n] = '$'
+ n++
+ copy(arr[n:], p.salt)
+ n += encodedSaltSize
+ copy(arr[n:], p.hash)
+ n += encodedHashSize
+ return arr[:n]
+}
+
+func (p *hashed) decodeVersion(sbytes []byte) (int, error) {
+ if sbytes[0] != '$' {
+ return -1, InvalidHashPrefixError(sbytes[0])
+ }
+ if sbytes[1] > majorVersion {
+ return -1, HashVersionTooNewError(sbytes[1])
+ }
+ p.major = sbytes[1]
+ n := 3
+ if sbytes[2] != '$' {
+ p.minor = sbytes[2]
+ n++
+ }
+ return n, nil
+}
+
+// sbytes should begin where decodeVersion left off.
+func (p *hashed) decodeCost(sbytes []byte) (int, error) {
+ cost, err := strconv.Atoi(string(sbytes[0:2]))
+ if err != nil {
+ return -1, err
+ }
+ err = checkCost(cost)
+ if err != nil {
+ return -1, err
+ }
+ p.cost = cost
+ return 3, nil
+}
+
+func (p *hashed) String() string {
+ return fmt.Sprintf("&{hash: %#v, salt: %#v, cost: %d, major: %c, minor: %c}", string(p.hash), p.salt, p.cost, p.major, p.minor)
+}
+
+func checkCost(cost int) error {
+ if cost < MinCost || cost > MaxCost {
+ return InvalidCostError(cost)
+ }
+ return nil
+}