From 114f42fe23152f6726144fe82eb62f400cfe1dba Mon Sep 17 00:00:00 2001 From: Miloslav Trmač Date: Fri, 27 Aug 2010 07:59:04 +0200 Subject: Add support for changing IVs in sessions --- crypto.4 | 4 ++++ ncr-sessions.c | 19 +++++++++++++++++++ 2 files changed, 23 insertions(+) diff --git a/crypto.4 b/crypto.4 index 0dc21e9..c2d1102 100644 --- a/crypto.4 +++ b/crypto.4 @@ -571,6 +571,10 @@ member. The following input attributes are recognized: .RS +.IP \fBNCR_ATTR_IV\fP +Only used for some operations and algorithms. +Optional, +IV from session initialization or left from last update is used if not present. .IP \fBNCR_ATTR_UPDATE_INPUT_DATA\fP A .B struct ncr_session_input_data diff --git a/ncr-sessions.c b/ncr-sessions.c index 41f8a4c..460df6f 100644 --- a/ncr-sessions.c +++ b/ncr-sessions.c @@ -661,6 +661,7 @@ static int get_userbuf2(struct session_item_st *ses, struct nlattr *tb[], static int _ncr_session_update(struct ncr_lists *lists, ncr_session_t ses, struct nlattr *tb[], int compat) { + const struct nlattr *nla; int ret; struct session_item_st* sess; struct scatterlist *isg = NULL; @@ -703,6 +704,15 @@ static int _ncr_session_update(struct ncr_lists *lists, ncr_session_t ses, goto fail; } + if (sess->algorithm->is_symmetric + && sess->algorithm->needs_iv) { + nla = tb[NCR_ATTR_IV]; + if (nla != NULL) + cryptodev_cipher_set_iv(&sess->cipher, + nla_data(nla), + nla_len(nla)); + } + ret = _ncr_session_encrypt(sess, isg, isg_cnt, isg_size, osg, osg_cnt, &osg_size); if (ret < 0) { @@ -731,6 +741,15 @@ static int _ncr_session_update(struct ncr_lists *lists, ncr_session_t ses, goto fail; } + if (sess->algorithm->is_symmetric + && sess->algorithm->needs_iv) { + nla = tb[NCR_ATTR_IV]; + if (nla != NULL) + cryptodev_cipher_set_iv(&sess->cipher, + nla_data(nla), + nla_len(nla)); + } + ret = _ncr_session_decrypt(sess, isg, isg_cnt, isg_size, osg, osg_cnt, &osg_size); if (ret < 0) { -- cgit