File gnutls-3.6.7-fips-backport_dont_truncate_output_IV.patch of Package gnutls.18748
Index: gnutls-3.6.7/lib/nettle/backport/cfb8.c
===================================================================
--- gnutls-3.6.7.orig/lib/nettle/backport/cfb8.c
+++ gnutls-3.6.7/lib/nettle/backport/cfb8.c
@@ -106,10 +106,12 @@ cfb8_decrypt(const void *ctx, nettle_cip
src += i;
dst += i;
- memcpy(buffer, buffer + block_size, block_size);
- memcpy(buffer + block_size, src,
- length < block_size ? length : block_size);
-
+ if (i == block_size)
+ {
+ memcpy(buffer, buffer + block_size, block_size);
+ memcpy(buffer + block_size, src,
+ length < block_size ? length : block_size);
+ }
}
memcpy(iv, buffer + i, block_size);