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Diffstat (limited to 'libgo/go/crypto/aes/ctr_s390x.go')
| -rw-r--r-- | libgo/go/crypto/aes/ctr_s390x.go | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/libgo/go/crypto/aes/ctr_s390x.go b/libgo/go/crypto/aes/ctr_s390x.go index 7892f79..a3c43a3 100644 --- a/libgo/go/crypto/aes/ctr_s390x.go +++ b/libgo/go/crypto/aes/ctr_s390x.go @@ -8,6 +8,7 @@ package aes import ( "crypto/cipher" + "crypto/internal/subtle" "unsafe" ) @@ -66,9 +67,11 @@ func (c *aesctr) refill() { } func (c *aesctr) XORKeyStream(dst, src []byte) { - if len(src) > 0 { - // Assert len(dst) >= len(src) - _ = dst[len(src)-1] + if len(dst) < len(src) { + panic("crypto/cipher: output smaller than input") + } + if subtle.InexactOverlap(dst[:len(src)], src) { + panic("crypto/cipher: invalid buffer overlap") } for len(src) > 0 { if len(c.buffer) == 0 { |