Add a custom copy handler for AES key wrap

This is necessary because ctx->cipher_data is an EVP_AES_WRAP_CTX
containing a pointer to ctx->iv. EVP_CIPHER_CTX_copy() uses memcpy
to copy cipher_data to the target struct. The result is that the
copy contains a pointer to the wrong struct, which then leads to a
use-after-free. The custom copy handler fixes things up to avoid
that.

Issue reported by Guido Vranken

ok beck inoguchi jsing

0 files changed, 0 insertions, 0 deletions