From 345c435dbb0b77b00ffe73801102533e24c647af Mon Sep 17 00:00:00 2001 From: Boaz Harrosh Date: Sun, 25 Jan 2009 17:03:07 +0200 Subject: [PATCH] [SCSI] libosd: OSD Security processing stubs Layout the signing of OSD's CDB and all-data security modes. The actual code for signing the data and CDB is missing, but the code flow and the extra buffer segments are all in place. Signed-off-by: Boaz Harrosh Reviewed-by: Benny Halevy Signed-off-by: James Bottomley --- drivers/scsi/osd/osd_initiator.c | 86 ++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) diff --git a/drivers/scsi/osd/osd_initiator.c b/drivers/scsi/osd/osd_initiator.c index b982d767bf99..6849f269cd1b 100644 --- a/drivers/scsi/osd/osd_initiator.c +++ b/drivers/scsi/osd/osd_initiator.c @@ -111,6 +111,14 @@ static osd_cdb_offset osd_req_encode_offset(struct osd_request *or, OSDv1_OFFSET_MIN_SHIFT, OSD_OFFSET_MAX_SHIFT); } +static struct osd_security_parameters * +_osd_req_sec_params(struct osd_request *or) +{ + struct osd_cdb *ocdb = &or->cdb; + + return &ocdb->v1.sec_params; +} + void osd_dev_init(struct osd_dev *osdd, struct scsi_device *scsi_device) { memset(osdd, 0, sizeof(*osdd)); @@ -799,6 +807,64 @@ static int _osd_req_finalize_attr_page(struct osd_request *or) return ret; } +static int _osd_req_finalize_data_integrity(struct osd_request *or, + bool has_in, bool has_out, const u8 *cap_key) +{ + struct osd_security_parameters *sec_parms = _osd_req_sec_params(or); + int ret; + + if (!osd_is_sec_alldata(sec_parms)) + return 0; + + if (has_out) { + struct _osd_req_data_segment seg = { + .buff = &or->out_data_integ, + .total_bytes = sizeof(or->out_data_integ), + }; + unsigned pad; + + or->out_data_integ.data_bytes = cpu_to_be64( + or->out.bio ? or->out.bio->bi_size : 0); + or->out_data_integ.set_attributes_bytes = cpu_to_be64( + or->set_attr.total_bytes); + or->out_data_integ.get_attributes_bytes = cpu_to_be64( + or->enc_get_attr.total_bytes); + + sec_parms->data_out_integrity_check_offset = + osd_req_encode_offset(or, or->out.total_bytes, &pad); + + ret = _req_append_segment(or, pad, &seg, or->out.last_seg, + &or->out); + if (ret) + return ret; + or->out.last_seg = NULL; + + /* they are now all chained to request sign them all together */ + osd_sec_sign_data(&or->out_data_integ, or->out.req->bio, + cap_key); + } + + if (has_in) { + struct _osd_req_data_segment seg = { + .buff = &or->in_data_integ, + .total_bytes = sizeof(or->in_data_integ), + }; + unsigned pad; + + sec_parms->data_in_integrity_check_offset = + osd_req_encode_offset(or, or->in.total_bytes, &pad); + + ret = _req_append_segment(or, pad, &seg, or->in.last_seg, + &or->in); + if (ret) + return ret; + + or->in.last_seg = NULL; + } + + return 0; +} + /* * osd_finalize_request and helpers */ @@ -919,6 +985,12 @@ int osd_finalize_request(struct osd_request *or, } } + ret = _osd_req_finalize_data_integrity(or, has_in, has_out, cap_key); + if (ret) + return ret; + + osd_sec_sign_cdb(&or->cdb, cap_key); + or->request->cmd = or->cdb.buff; or->request->cmd_len = _osd_req_cdb_len(or); @@ -984,6 +1056,20 @@ void osd_set_caps(struct osd_cdb *cdb, const void *caps) memcpy(&cdb->v1.caps, caps, OSDv1_CAP_LEN); } +bool osd_is_sec_alldata(struct osd_security_parameters *sec_parms __unused) +{ + return false; +} + +void osd_sec_sign_cdb(struct osd_cdb *ocdb __unused, const u8 *cap_key __unused) +{ +} + +void osd_sec_sign_data(void *data_integ __unused, + struct bio *bio __unused, const u8 *cap_key __unused) +{ +} + /* * Declared in osd_protocol.h * 4.12.5 Data-In and Data-Out buffer offsets -- GitLab