diff options
Diffstat (limited to 'vendor/golang.org/x/crypto/nacl/secretbox')
| -rw-r--r-- | vendor/golang.org/x/crypto/nacl/secretbox/secretbox.go | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/vendor/golang.org/x/crypto/nacl/secretbox/secretbox.go b/vendor/golang.org/x/crypto/nacl/secretbox/secretbox.go index 53ee83cf..a98d1bd4 100644 --- a/vendor/golang.org/x/crypto/nacl/secretbox/secretbox.go +++ b/vendor/golang.org/x/crypto/nacl/secretbox/secretbox.go @@ -35,6 +35,7 @@ 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/internal/subtle" "golang.org/x/crypto/poly1305" "golang.org/x/crypto/salsa20/salsa" ) @@ -87,6 +88,9 @@ func Seal(out, message []byte, nonce *[24]byte, key *[32]byte) []byte { copy(poly1305Key[:], firstBlock[:]) ret, out := sliceForAppend(out, len(message)+poly1305.TagSize) + if subtle.AnyOverlap(out, message) { + panic("nacl: invalid buffer overlap") + } // We XOR up to 32 bytes of message with the keystream generated from // the first block. @@ -118,7 +122,7 @@ func Seal(out, message []byte, nonce *[24]byte, key *[32]byte) []byte { // 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) { +func Open(out, box []byte, nonce *[24]byte, key *[32]byte) ([]byte, bool) { if len(box) < Overhead { return nil, false } @@ -143,6 +147,9 @@ func Open(out []byte, box []byte, nonce *[24]byte, key *[32]byte) ([]byte, bool) } ret, out := sliceForAppend(out, len(box)-Overhead) + if subtle.AnyOverlap(out, box) { + panic("nacl: invalid buffer overlap") + } // We XOR up to 32 bytes of box with the keystream generated from // the first block. |