diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/crypto/aes/gcm_ppc64x.go | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/crypto/aes/gcm_ppc64x.go b/src/crypto/aes/gcm_ppc64x.go index f1e85129a8..e3fa48ed8d 100644 --- a/src/crypto/aes/gcm_ppc64x.go +++ b/src/crypto/aes/gcm_ppc64x.go @@ -8,6 +8,7 @@ package aes import ( "crypto/cipher" + "crypto/internal/alias" "crypto/subtle" "errors" "internal/byteorder" @@ -171,6 +172,9 @@ func (g *gcmAsm) Seal(dst, nonce, plaintext, data []byte) []byte { } ret, out := sliceForAppend(dst, len(plaintext)+g.tagSize) + if alias.InexactOverlap(out[:len(plaintext)], plaintext) { + panic("crypto/cipher: invalid buffer overlap") + } var counter, tagMask [gcmBlockSize]byte g.deriveCounter(&counter, nonce) @@ -210,6 +214,9 @@ func (g *gcmAsm) Open(dst, nonce, ciphertext, data []byte) ([]byte, error) { g.auth(expectedTag[:], ciphertext, data, &tagMask) ret, out := sliceForAppend(dst, len(ciphertext)) + if alias.InexactOverlap(out, ciphertext) { + panic("crypto/cipher: invalid buffer overlap") + } if subtle.ConstantTimeCompare(expectedTag[:g.tagSize], tag) != 1 { clear(out) |