diff options
Diffstat (limited to 'vendor/golang.org/x/crypto/nacl/secretbox')
3 files changed, 0 insertions, 293 deletions
diff --git a/vendor/golang.org/x/crypto/nacl/secretbox/example_test.go b/vendor/golang.org/x/crypto/nacl/secretbox/example_test.go deleted file mode 100644 index b25e663..0000000 --- a/vendor/golang.org/x/crypto/nacl/secretbox/example_test.go +++ /dev/null @@ -1,53 +0,0 @@ -// Copyright 2016 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 secretbox_test - -import ( - "crypto/rand" - "encoding/hex" - "fmt" - "io" - - "golang.org/x/crypto/nacl/secretbox" -) - -func Example() { - // Load your secret key from a safe place and reuse it across multiple - // Seal calls. (Obviously don't use this example key for anything - // real.) If you want to convert a passphrase to a key, use a suitable - // package like bcrypt or scrypt. - secretKeyBytes, err := hex.DecodeString("6368616e676520746869732070617373776f726420746f206120736563726574") - if err != nil { - panic(err) - } - - var secretKey [32]byte - copy(secretKey[:], secretKeyBytes) - - // You must use a different nonce for each message you encrypt with the - // same key. Since the nonce here is 192 bits long, a random value - // provides a sufficiently small probability of repeats. - var nonce [24]byte - if _, err := io.ReadFull(rand.Reader, nonce[:]); err != nil { - panic(err) - } - - // This encrypts "hello world" and appends the result to the nonce. - encrypted := secretbox.Seal(nonce[:], []byte("hello world"), &nonce, &secretKey) - - // When you decrypt, you must use the same nonce and key you used to - // encrypt the message. One way to achieve this is to store the nonce - // alongside the encrypted message. Above, we stored the nonce in the first - // 24 bytes of the encrypted text. - var decryptNonce [24]byte - copy(decryptNonce[:], encrypted[:24]) - decrypted, ok := secretbox.Open([]byte{}, encrypted[24:], &decryptNonce, &secretKey) - if !ok { - panic("decryption error") - } - - fmt.Println(string(decrypted)) - // Output: hello world -} diff --git a/vendor/golang.org/x/crypto/nacl/secretbox/secretbox.go b/vendor/golang.org/x/crypto/nacl/secretbox/secretbox.go deleted file mode 100644 index 1e1dff5..0000000 --- a/vendor/golang.org/x/crypto/nacl/secretbox/secretbox.go +++ /dev/null @@ -1,149 +0,0 @@ -// 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 secretbox encrypts and authenticates small messages. - -Secretbox uses XSalsa20 and Poly1305 to encrypt and authenticate messages with -secret-key cryptography. The length of messages is not hidden. - -It is the caller's responsibility to ensure the uniqueness of nonces—for -example, by using nonce 1 for the first message, nonce 2 for the second -message, etc. Nonces are long enough that randomly generated nonces have -negligible risk of collision. - -This package is interoperable with NaCl: https://nacl.cr.yp.to/secretbox.html. -*/ -package secretbox // import "golang.org/x/crypto/nacl/secretbox" - -import ( - "golang.org/x/crypto/poly1305" - "golang.org/x/crypto/salsa20/salsa" -) - -// Overhead is the number of bytes of overhead when boxing a message. -const Overhead = poly1305.TagSize - -// setup produces a sub-key and Salsa20 counter given a nonce and key. -func setup(subKey *[32]byte, counter *[16]byte, nonce *[24]byte, key *[32]byte) { - // We use XSalsa20 for encryption so first we need to generate a - // key and nonce with HSalsa20. - var hNonce [16]byte - copy(hNonce[:], nonce[:]) - salsa.HSalsa20(subKey, &hNonce, key, &salsa.Sigma) - - // The final 8 bytes of the original nonce form the new nonce. - copy(counter[:], nonce[16:]) -} - -// sliceForAppend takes a slice and a requested number of bytes. It returns a -// slice with the contents of the given slice followed by that many bytes and a -// second slice that aliases into it and contains only the extra bytes. If the -// original slice has sufficient capacity then no allocation is performed. -func sliceForAppend(in []byte, n int) (head, tail []byte) { - if total := len(in) + n; cap(in) >= total { - head = in[:total] - } else { - head = make([]byte, total) - copy(head, in) - } - tail = head[len(in):] - return -} - -// Seal appends an encrypted and authenticated copy of message to out, which -// must not overlap message. The key and nonce pair must be unique for each -// distinct message and the output will be Overhead bytes longer than message. -func Seal(out, message []byte, nonce *[24]byte, key *[32]byte) []byte { - var subKey [32]byte - var counter [16]byte - setup(&subKey, &counter, nonce, key) - - // The Poly1305 key is generated by encrypting 32 bytes of zeros. Since - // Salsa20 works with 64-byte blocks, we also generate 32 bytes of - // keystream as a side effect. - var firstBlock [64]byte - salsa.XORKeyStream(firstBlock[:], firstBlock[:], &counter, &subKey) - - var poly1305Key [32]byte - copy(poly1305Key[:], firstBlock[:]) - - ret, out := sliceForAppend(out, len(message)+poly1305.TagSize) - - // We XOR up to 32 bytes of message with the keystream generated from - // the first block. - firstMessageBlock := message - if len(firstMessageBlock) > 32 { - firstMessageBlock = firstMessageBlock[:32] - } - - tagOut := out - out = out[poly1305.TagSize:] - for i, x := range firstMessageBlock { - out[i] = firstBlock[32+i] ^ x - } - message = message[len(firstMessageBlock):] - ciphertext := out - out = out[len(firstMessageBlock):] - - // Now encrypt the rest. - counter[8] = 1 - salsa.XORKeyStream(out, message, &counter, &subKey) - - var tag [poly1305.TagSize]byte - poly1305.Sum(&tag, ciphertext, &poly1305Key) - copy(tagOut, tag[:]) - - return ret -} - -// Open authenticates and decrypts a box produced by Seal and appends the -// message to out, which must not overlap box. The output will be Overhead -// bytes smaller than box. -func Open(out []byte, box []byte, nonce *[24]byte, key *[32]byte) ([]byte, bool) { - if len(box) < Overhead { - return nil, false - } - - var subKey [32]byte - var counter [16]byte - setup(&subKey, &counter, nonce, key) - - // The Poly1305 key is generated by encrypting 32 bytes of zeros. Since - // Salsa20 works with 64-byte blocks, we also generate 32 bytes of - // keystream as a side effect. - var firstBlock [64]byte - salsa.XORKeyStream(firstBlock[:], firstBlock[:], &counter, &subKey) - - var poly1305Key [32]byte - copy(poly1305Key[:], firstBlock[:]) - var tag [poly1305.TagSize]byte - copy(tag[:], box) - - if !poly1305.Verify(&tag, box[poly1305.TagSize:], &poly1305Key) { - return nil, false - } - - ret, out := sliceForAppend(out, len(box)-Overhead) - - // We XOR up to 32 bytes of box with the keystream generated from - // the first block. - box = box[Overhead:] - firstMessageBlock := box - if len(firstMessageBlock) > 32 { - firstMessageBlock = firstMessageBlock[:32] - } - for i, x := range firstMessageBlock { - out[i] = firstBlock[32+i] ^ x - } - - box = box[len(firstMessageBlock):] - out = out[len(firstMessageBlock):] - - // Now decrypt the rest. - counter[8] = 1 - salsa.XORKeyStream(out, box, &counter, &subKey) - - return ret, true -} diff --git a/vendor/golang.org/x/crypto/nacl/secretbox/secretbox_test.go b/vendor/golang.org/x/crypto/nacl/secretbox/secretbox_test.go deleted file mode 100644 index 664dc15..0000000 --- a/vendor/golang.org/x/crypto/nacl/secretbox/secretbox_test.go +++ /dev/null @@ -1,91 +0,0 @@ -// 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 secretbox - -import ( - "bytes" - "crypto/rand" - "encoding/hex" - "testing" -) - -func TestSealOpen(t *testing.T) { - var key [32]byte - var nonce [24]byte - - rand.Reader.Read(key[:]) - rand.Reader.Read(nonce[:]) - - var box, opened []byte - - for msgLen := 0; msgLen < 128; msgLen += 17 { - message := make([]byte, msgLen) - rand.Reader.Read(message) - - box = Seal(box[:0], message, &nonce, &key) - var ok bool - opened, ok = Open(opened[:0], box, &nonce, &key) - if !ok { - t.Errorf("%d: failed to open box", msgLen) - continue - } - - if !bytes.Equal(opened, message) { - t.Errorf("%d: got %x, expected %x", msgLen, opened, message) - continue - } - } - - for i := range box { - box[i] ^= 0x20 - _, ok := Open(opened[:0], box, &nonce, &key) - if ok { - t.Errorf("box was opened after corrupting byte %d", i) - } - box[i] ^= 0x20 - } -} - -func TestSecretBox(t *testing.T) { - var key [32]byte - var nonce [24]byte - var message [64]byte - - for i := range key[:] { - key[i] = 1 - } - for i := range nonce[:] { - nonce[i] = 2 - } - for i := range message[:] { - message[i] = 3 - } - - box := Seal(nil, message[:], &nonce, &key) - // expected was generated using the C implementation of NaCl. - expected, _ := hex.DecodeString("8442bc313f4626f1359e3b50122b6ce6fe66ddfe7d39d14e637eb4fd5b45beadab55198df6ab5368439792a23c87db70acb6156dc5ef957ac04f6276cf6093b84be77ff0849cc33e34b7254d5a8f65ad") - - if !bytes.Equal(box, expected) { - t.Fatalf("box didn't match, got\n%x\n, expected\n%x", box, expected) - } -} - -func TestAppend(t *testing.T) { - var key [32]byte - var nonce [24]byte - var message [8]byte - - out := make([]byte, 4) - box := Seal(out, message[:], &nonce, &key) - if !bytes.Equal(box[:4], out[:4]) { - t.Fatalf("Seal didn't correctly append") - } - - out = make([]byte, 4, 100) - box = Seal(out, message[:], &nonce, &key) - if !bytes.Equal(box[:4], out[:4]) { - t.Fatalf("Seal didn't correctly append with sufficient capacity.") - } -} |