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Avoid overflow in MDC2_Update()
[openssl.git]
/
crypto
/
mdc2
/
mdc2dgst.c
diff --git
a/crypto/mdc2/mdc2dgst.c
b/crypto/mdc2/mdc2dgst.c
index 6615cf84d7d2a2f5607f810f41820db6bc745172..2dce4936337a03a4b6e06fbeb1fb4a8775ed7d9c 100644
(file)
--- a/
crypto/mdc2/mdc2dgst.c
+++ b/
crypto/mdc2/mdc2dgst.c
@@
-91,7
+91,7
@@
int MDC2_Update(MDC2_CTX *c, const unsigned char *in, size_t len)
i = c->num;
if (i != 0) {
- if (
i + len < MDC2_BLOCK
) {
+ if (
len < MDC2_BLOCK - i
) {
/* partial block */
memcpy(&(c->data[i]), in, len);
c->num += (int)len;