1293 строки
31 KiB
C
1293 строки
31 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright IBM Corp. 2019
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* Author(s): Harald Freudenberger <freude@linux.ibm.com>
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*
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* Collection of EP11 misc functions used by zcrypt and pkey
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*/
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#define KMSG_COMPONENT "zcrypt"
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/random.h>
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#include <asm/zcrypt.h>
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#include <asm/pkey.h>
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#include "ap_bus.h"
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#include "zcrypt_api.h"
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#include "zcrypt_debug.h"
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#include "zcrypt_msgtype6.h"
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#include "zcrypt_ep11misc.h"
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#include "zcrypt_ccamisc.h"
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#define DEBUG_DBG(...) ZCRYPT_DBF(DBF_DEBUG, ##__VA_ARGS__)
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#define DEBUG_INFO(...) ZCRYPT_DBF(DBF_INFO, ##__VA_ARGS__)
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#define DEBUG_WARN(...) ZCRYPT_DBF(DBF_WARN, ##__VA_ARGS__)
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#define DEBUG_ERR(...) ZCRYPT_DBF(DBF_ERR, ##__VA_ARGS__)
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/* default iv used here */
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static const u8 def_iv[16] = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
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0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff };
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/* ep11 card info cache */
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struct card_list_entry {
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struct list_head list;
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u16 cardnr;
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struct ep11_card_info info;
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};
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static LIST_HEAD(card_list);
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static DEFINE_SPINLOCK(card_list_lock);
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static int card_cache_fetch(u16 cardnr, struct ep11_card_info *ci)
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{
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int rc = -ENOENT;
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struct card_list_entry *ptr;
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spin_lock_bh(&card_list_lock);
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list_for_each_entry(ptr, &card_list, list) {
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if (ptr->cardnr == cardnr) {
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memcpy(ci, &ptr->info, sizeof(*ci));
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rc = 0;
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break;
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}
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}
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spin_unlock_bh(&card_list_lock);
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return rc;
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}
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static void card_cache_update(u16 cardnr, const struct ep11_card_info *ci)
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{
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int found = 0;
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struct card_list_entry *ptr;
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spin_lock_bh(&card_list_lock);
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list_for_each_entry(ptr, &card_list, list) {
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if (ptr->cardnr == cardnr) {
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memcpy(&ptr->info, ci, sizeof(*ci));
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found = 1;
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break;
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}
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}
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if (!found) {
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ptr = kmalloc(sizeof(*ptr), GFP_ATOMIC);
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if (!ptr) {
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spin_unlock_bh(&card_list_lock);
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return;
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}
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ptr->cardnr = cardnr;
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memcpy(&ptr->info, ci, sizeof(*ci));
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list_add(&ptr->list, &card_list);
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}
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spin_unlock_bh(&card_list_lock);
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}
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static void card_cache_scrub(u16 cardnr)
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{
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struct card_list_entry *ptr;
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spin_lock_bh(&card_list_lock);
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list_for_each_entry(ptr, &card_list, list) {
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if (ptr->cardnr == cardnr) {
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list_del(&ptr->list);
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kfree(ptr);
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break;
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}
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}
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spin_unlock_bh(&card_list_lock);
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}
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static void __exit card_cache_free(void)
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{
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struct card_list_entry *ptr, *pnext;
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spin_lock_bh(&card_list_lock);
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list_for_each_entry_safe(ptr, pnext, &card_list, list) {
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list_del(&ptr->list);
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kfree(ptr);
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}
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spin_unlock_bh(&card_list_lock);
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}
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/*
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* Simple check if the key blob is a valid EP11 secure AES key.
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*/
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int ep11_check_aeskeyblob(debug_info_t *dbg, int dbflvl,
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const u8 *key, int keybitsize,
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int checkcpacfexport)
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{
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struct ep11keyblob *kb = (struct ep11keyblob *) key;
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#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
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if (kb->head.type != TOKTYPE_NON_CCA) {
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if (dbg)
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DBF("%s key check failed, type 0x%02x != 0x%02x\n",
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__func__, (int) kb->head.type, TOKTYPE_NON_CCA);
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return -EINVAL;
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}
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if (kb->head.version != TOKVER_EP11_AES) {
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if (dbg)
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DBF("%s key check failed, version 0x%02x != 0x%02x\n",
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__func__, (int) kb->head.version, TOKVER_EP11_AES);
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return -EINVAL;
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}
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if (kb->version != EP11_STRUCT_MAGIC) {
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if (dbg)
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DBF("%s key check failed, magic 0x%04x != 0x%04x\n",
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__func__, (int) kb->version, EP11_STRUCT_MAGIC);
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return -EINVAL;
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}
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switch (kb->head.keybitlen) {
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case 128:
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case 192:
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case 256:
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break;
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default:
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if (dbg)
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DBF("%s key check failed, keybitlen %d invalid\n",
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__func__, (int) kb->head.keybitlen);
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return -EINVAL;
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}
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if (keybitsize > 0 && keybitsize != (int) kb->head.keybitlen) {
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DBF("%s key check failed, keybitsize %d\n",
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__func__, keybitsize);
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return -EINVAL;
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}
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if (checkcpacfexport && !(kb->attr & EP11_BLOB_PKEY_EXTRACTABLE)) {
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if (dbg)
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DBF("%s key check failed, PKEY_EXTRACTABLE is 0\n",
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__func__);
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return -EINVAL;
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}
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#undef DBF
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return 0;
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}
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EXPORT_SYMBOL(ep11_check_aeskeyblob);
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/*
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* Helper function which calls zcrypt_send_ep11_cprb with
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* memory management segment adjusted to kernel space
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* so that the copy_from_user called within this
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* function do in fact copy from kernel space.
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*/
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static inline int _zcrypt_send_ep11_cprb(struct ep11_urb *urb)
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{
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int rc;
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mm_segment_t old_fs = get_fs();
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set_fs(KERNEL_DS);
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rc = zcrypt_send_ep11_cprb(urb);
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set_fs(old_fs);
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return rc;
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}
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/*
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* Allocate and prepare ep11 cprb plus additional payload.
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*/
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static inline struct ep11_cprb *alloc_cprb(size_t payload_len)
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{
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size_t len = sizeof(struct ep11_cprb) + payload_len;
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struct ep11_cprb *cprb;
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cprb = kzalloc(len, GFP_KERNEL);
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if (!cprb)
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return NULL;
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cprb->cprb_len = sizeof(struct ep11_cprb);
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cprb->cprb_ver_id = 0x04;
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memcpy(cprb->func_id, "T4", 2);
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cprb->ret_code = 0xFFFFFFFF;
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cprb->payload_len = payload_len;
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return cprb;
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}
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/*
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* Some helper functions related to ASN1 encoding.
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* Limited to length info <= 2 byte.
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*/
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#define ASN1TAGLEN(x) (2 + (x) + ((x) > 127 ? 1 : 0) + ((x) > 255 ? 1 : 0))
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static int asn1tag_write(u8 *ptr, u8 tag, const u8 *pvalue, u16 valuelen)
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{
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ptr[0] = tag;
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if (valuelen > 255) {
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ptr[1] = 0x82;
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*((u16 *)(ptr + 2)) = valuelen;
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memcpy(ptr + 4, pvalue, valuelen);
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return 4 + valuelen;
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}
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if (valuelen > 127) {
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ptr[1] = 0x81;
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ptr[2] = (u8) valuelen;
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memcpy(ptr + 3, pvalue, valuelen);
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return 3 + valuelen;
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}
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ptr[1] = (u8) valuelen;
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memcpy(ptr + 2, pvalue, valuelen);
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return 2 + valuelen;
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}
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/* EP11 payload > 127 bytes starts with this struct */
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struct pl_head {
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u8 tag;
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u8 lenfmt;
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u16 len;
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u8 func_tag;
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u8 func_len;
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u32 func;
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u8 dom_tag;
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u8 dom_len;
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u32 dom;
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} __packed;
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/* prep ep11 payload head helper function */
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static inline void prep_head(struct pl_head *h,
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size_t pl_size, int api, int func)
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{
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h->tag = 0x30;
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h->lenfmt = 0x82;
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h->len = pl_size - 4;
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h->func_tag = 0x04;
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h->func_len = sizeof(u32);
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h->func = (api << 16) + func;
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h->dom_tag = 0x04;
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h->dom_len = sizeof(u32);
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}
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/* prep urb helper function */
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static inline void prep_urb(struct ep11_urb *u,
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struct ep11_target_dev *t, int nt,
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struct ep11_cprb *req, size_t req_len,
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struct ep11_cprb *rep, size_t rep_len)
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{
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u->targets = (u8 __user *) t;
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u->targets_num = nt;
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u->req = (u8 __user *) req;
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u->req_len = req_len;
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u->resp = (u8 __user *) rep;
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u->resp_len = rep_len;
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}
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/* Check ep11 reply payload, return 0 or suggested errno value. */
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static int check_reply_pl(const u8 *pl, const char *func)
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{
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int len;
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u32 ret;
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/* start tag */
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if (*pl++ != 0x30) {
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DEBUG_ERR("%s reply start tag mismatch\n", func);
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return -EIO;
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}
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/* payload length format */
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if (*pl < 127) {
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len = *pl;
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pl++;
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} else if (*pl == 0x81) {
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pl++;
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len = *pl;
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pl++;
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} else if (*pl == 0x82) {
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pl++;
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len = *((u16 *)pl);
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pl += 2;
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} else {
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DEBUG_ERR("%s reply start tag lenfmt mismatch 0x%02hhx\n",
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func, *pl);
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return -EIO;
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}
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/* len should cover at least 3 fields with 32 bit value each */
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if (len < 3 * 6) {
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DEBUG_ERR("%s reply length %d too small\n", func, len);
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return -EIO;
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}
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/* function tag, length and value */
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if (pl[0] != 0x04 || pl[1] != 0x04) {
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DEBUG_ERR("%s function tag or length mismatch\n", func);
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return -EIO;
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}
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pl += 6;
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/* dom tag, length and value */
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if (pl[0] != 0x04 || pl[1] != 0x04) {
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DEBUG_ERR("%s dom tag or length mismatch\n", func);
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return -EIO;
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}
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pl += 6;
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/* return value tag, length and value */
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if (pl[0] != 0x04 || pl[1] != 0x04) {
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DEBUG_ERR("%s return value tag or length mismatch\n", func);
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return -EIO;
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}
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pl += 2;
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ret = *((u32 *)pl);
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if (ret != 0) {
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DEBUG_ERR("%s return value 0x%04x != 0\n", func, ret);
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return -EIO;
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}
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return 0;
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}
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/*
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* Helper function which does an ep11 query with given query type.
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*/
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static int ep11_query_info(u16 cardnr, u16 domain, u32 query_type,
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size_t buflen, u8 *buf)
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{
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struct ep11_info_req_pl {
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struct pl_head head;
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u8 query_type_tag;
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u8 query_type_len;
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u32 query_type;
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u8 query_subtype_tag;
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u8 query_subtype_len;
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u32 query_subtype;
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} __packed * req_pl;
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struct ep11_info_rep_pl {
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struct pl_head head;
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u8 rc_tag;
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u8 rc_len;
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u32 rc;
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u8 data_tag;
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u8 data_lenfmt;
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u16 data_len;
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} __packed * rep_pl;
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struct ep11_cprb *req = NULL, *rep = NULL;
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struct ep11_target_dev target;
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struct ep11_urb *urb = NULL;
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int api = 1, rc = -ENOMEM;
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/* request cprb and payload */
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req = alloc_cprb(sizeof(struct ep11_info_req_pl));
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if (!req)
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goto out;
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req_pl = (struct ep11_info_req_pl *) (((u8 *) req) + sizeof(*req));
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prep_head(&req_pl->head, sizeof(*req_pl), api, 38); /* get xcp info */
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req_pl->query_type_tag = 0x04;
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req_pl->query_type_len = sizeof(u32);
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req_pl->query_type = query_type;
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req_pl->query_subtype_tag = 0x04;
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req_pl->query_subtype_len = sizeof(u32);
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/* reply cprb and payload */
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rep = alloc_cprb(sizeof(struct ep11_info_rep_pl) + buflen);
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if (!rep)
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goto out;
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rep_pl = (struct ep11_info_rep_pl *) (((u8 *) rep) + sizeof(*rep));
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/* urb and target */
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urb = kmalloc(sizeof(struct ep11_urb), GFP_KERNEL);
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if (!urb)
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goto out;
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target.ap_id = cardnr;
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target.dom_id = domain;
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prep_urb(urb, &target, 1,
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req, sizeof(*req) + sizeof(*req_pl),
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rep, sizeof(*rep) + sizeof(*rep_pl) + buflen);
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rc = _zcrypt_send_ep11_cprb(urb);
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if (rc) {
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DEBUG_ERR(
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"%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
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__func__, (int) cardnr, (int) domain, rc);
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goto out;
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}
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rc = check_reply_pl((u8 *)rep_pl, __func__);
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if (rc)
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goto out;
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if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
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DEBUG_ERR("%s unknown reply data format\n", __func__);
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rc = -EIO;
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goto out;
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}
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if (rep_pl->data_len > buflen) {
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DEBUG_ERR("%s mismatch between reply data len and buffer len\n",
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__func__);
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rc = -ENOSPC;
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goto out;
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}
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memcpy(buf, ((u8 *) rep_pl) + sizeof(*rep_pl), rep_pl->data_len);
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out:
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kfree(req);
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kfree(rep);
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kfree(urb);
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return rc;
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}
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/*
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* Provide information about an EP11 card.
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*/
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int ep11_get_card_info(u16 card, struct ep11_card_info *info, int verify)
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{
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int rc;
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struct ep11_module_query_info {
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u32 API_ord_nr;
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u32 firmware_id;
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u8 FW_major_vers;
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u8 FW_minor_vers;
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u8 CSP_major_vers;
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u8 CSP_minor_vers;
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u8 fwid[32];
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u8 xcp_config_hash[32];
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u8 CSP_config_hash[32];
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u8 serial[16];
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u8 module_date_time[16];
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u64 op_mode;
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u32 PKCS11_flags;
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u32 ext_flags;
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u32 domains;
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u32 sym_state_bytes;
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u32 digest_state_bytes;
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u32 pin_blob_bytes;
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u32 SPKI_bytes;
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u32 priv_key_blob_bytes;
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u32 sym_blob_bytes;
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u32 max_payload_bytes;
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u32 CP_profile_bytes;
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u32 max_CP_index;
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} __packed * pmqi = NULL;
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rc = card_cache_fetch(card, info);
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if (rc || verify) {
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pmqi = kmalloc(sizeof(*pmqi), GFP_KERNEL);
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if (!pmqi)
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return -ENOMEM;
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rc = ep11_query_info(card, AUTOSEL_DOM,
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0x01 /* module info query */,
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sizeof(*pmqi), (u8 *) pmqi);
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if (rc) {
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if (rc == -ENODEV)
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card_cache_scrub(card);
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goto out;
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}
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memset(info, 0, sizeof(*info));
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info->API_ord_nr = pmqi->API_ord_nr;
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info->FW_version =
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(pmqi->FW_major_vers << 8) + pmqi->FW_minor_vers;
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memcpy(info->serial, pmqi->serial, sizeof(info->serial));
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info->op_mode = pmqi->op_mode;
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card_cache_update(card, info);
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}
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out:
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kfree(pmqi);
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return rc;
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}
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EXPORT_SYMBOL(ep11_get_card_info);
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/*
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* Provide information about a domain within an EP11 card.
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*/
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int ep11_get_domain_info(u16 card, u16 domain, struct ep11_domain_info *info)
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{
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int rc;
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struct ep11_domain_query_info {
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u32 dom_index;
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u8 cur_WK_VP[32];
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u8 new_WK_VP[32];
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u32 dom_flags;
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u64 op_mode;
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} __packed * p_dom_info;
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p_dom_info = kmalloc(sizeof(*p_dom_info), GFP_KERNEL);
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if (!p_dom_info)
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return -ENOMEM;
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|
|
rc = ep11_query_info(card, domain, 0x03 /* domain info query */,
|
|
sizeof(*p_dom_info), (u8 *) p_dom_info);
|
|
if (rc)
|
|
goto out;
|
|
|
|
memset(info, 0, sizeof(*info));
|
|
info->cur_wk_state = '0';
|
|
info->new_wk_state = '0';
|
|
if (p_dom_info->dom_flags & 0x10 /* left imprint mode */) {
|
|
if (p_dom_info->dom_flags & 0x02 /* cur wk valid */) {
|
|
info->cur_wk_state = '1';
|
|
memcpy(info->cur_wkvp, p_dom_info->cur_WK_VP, 32);
|
|
}
|
|
if (p_dom_info->dom_flags & 0x04 /* new wk present */
|
|
|| p_dom_info->dom_flags & 0x08 /* new wk committed */) {
|
|
info->new_wk_state =
|
|
p_dom_info->dom_flags & 0x08 ? '2' : '1';
|
|
memcpy(info->new_wkvp, p_dom_info->new_WK_VP, 32);
|
|
}
|
|
}
|
|
info->op_mode = p_dom_info->op_mode;
|
|
|
|
out:
|
|
kfree(p_dom_info);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(ep11_get_domain_info);
|
|
|
|
/*
|
|
* Default EP11 AES key generate attributes, used when no keygenflags given:
|
|
* XCP_BLOB_ENCRYPT | XCP_BLOB_DECRYPT | XCP_BLOB_PROTKEY_EXTRACTABLE
|
|
*/
|
|
#define KEY_ATTR_DEFAULTS 0x00200c00
|
|
|
|
int ep11_genaeskey(u16 card, u16 domain, u32 keybitsize, u32 keygenflags,
|
|
u8 *keybuf, size_t *keybufsize)
|
|
{
|
|
struct keygen_req_pl {
|
|
struct pl_head head;
|
|
u8 var_tag;
|
|
u8 var_len;
|
|
u32 var;
|
|
u8 keybytes_tag;
|
|
u8 keybytes_len;
|
|
u32 keybytes;
|
|
u8 mech_tag;
|
|
u8 mech_len;
|
|
u32 mech;
|
|
u8 attr_tag;
|
|
u8 attr_len;
|
|
u32 attr_header;
|
|
u32 attr_bool_mask;
|
|
u32 attr_bool_bits;
|
|
u32 attr_val_len_type;
|
|
u32 attr_val_len_value;
|
|
u8 pin_tag;
|
|
u8 pin_len;
|
|
} __packed * req_pl;
|
|
struct keygen_rep_pl {
|
|
struct pl_head head;
|
|
u8 rc_tag;
|
|
u8 rc_len;
|
|
u32 rc;
|
|
u8 data_tag;
|
|
u8 data_lenfmt;
|
|
u16 data_len;
|
|
u8 data[512];
|
|
} __packed * rep_pl;
|
|
struct ep11_cprb *req = NULL, *rep = NULL;
|
|
struct ep11_target_dev target;
|
|
struct ep11_urb *urb = NULL;
|
|
struct ep11keyblob *kb;
|
|
int api, rc = -ENOMEM;
|
|
|
|
switch (keybitsize) {
|
|
case 128:
|
|
case 192:
|
|
case 256:
|
|
break;
|
|
default:
|
|
DEBUG_ERR(
|
|
"%s unknown/unsupported keybitsize %d\n",
|
|
__func__, keybitsize);
|
|
rc = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* request cprb and payload */
|
|
req = alloc_cprb(sizeof(struct keygen_req_pl));
|
|
if (!req)
|
|
goto out;
|
|
req_pl = (struct keygen_req_pl *) (((u8 *) req) + sizeof(*req));
|
|
api = (!keygenflags || keygenflags & 0x00200000) ? 4 : 1;
|
|
prep_head(&req_pl->head, sizeof(*req_pl), api, 21); /* GenerateKey */
|
|
req_pl->var_tag = 0x04;
|
|
req_pl->var_len = sizeof(u32);
|
|
req_pl->keybytes_tag = 0x04;
|
|
req_pl->keybytes_len = sizeof(u32);
|
|
req_pl->keybytes = keybitsize / 8;
|
|
req_pl->mech_tag = 0x04;
|
|
req_pl->mech_len = sizeof(u32);
|
|
req_pl->mech = 0x00001080; /* CKM_AES_KEY_GEN */
|
|
req_pl->attr_tag = 0x04;
|
|
req_pl->attr_len = 5 * sizeof(u32);
|
|
req_pl->attr_header = 0x10010000;
|
|
req_pl->attr_bool_mask = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
|
|
req_pl->attr_bool_bits = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
|
|
req_pl->attr_val_len_type = 0x00000161; /* CKA_VALUE_LEN */
|
|
req_pl->attr_val_len_value = keybitsize / 8;
|
|
req_pl->pin_tag = 0x04;
|
|
|
|
/* reply cprb and payload */
|
|
rep = alloc_cprb(sizeof(struct keygen_rep_pl));
|
|
if (!rep)
|
|
goto out;
|
|
rep_pl = (struct keygen_rep_pl *) (((u8 *) rep) + sizeof(*rep));
|
|
|
|
/* urb and target */
|
|
urb = kmalloc(sizeof(struct ep11_urb), GFP_KERNEL);
|
|
if (!urb)
|
|
goto out;
|
|
target.ap_id = card;
|
|
target.dom_id = domain;
|
|
prep_urb(urb, &target, 1,
|
|
req, sizeof(*req) + sizeof(*req_pl),
|
|
rep, sizeof(*rep) + sizeof(*rep_pl));
|
|
|
|
rc = _zcrypt_send_ep11_cprb(urb);
|
|
if (rc) {
|
|
DEBUG_ERR(
|
|
"%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
|
|
__func__, (int) card, (int) domain, rc);
|
|
goto out;
|
|
}
|
|
|
|
rc = check_reply_pl((u8 *)rep_pl, __func__);
|
|
if (rc)
|
|
goto out;
|
|
if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
|
|
DEBUG_ERR("%s unknown reply data format\n", __func__);
|
|
rc = -EIO;
|
|
goto out;
|
|
}
|
|
if (rep_pl->data_len > *keybufsize) {
|
|
DEBUG_ERR("%s mismatch reply data len / key buffer len\n",
|
|
__func__);
|
|
rc = -ENOSPC;
|
|
goto out;
|
|
}
|
|
|
|
/* copy key blob and set header values */
|
|
memcpy(keybuf, rep_pl->data, rep_pl->data_len);
|
|
*keybufsize = rep_pl->data_len;
|
|
kb = (struct ep11keyblob *) keybuf;
|
|
kb->head.type = TOKTYPE_NON_CCA;
|
|
kb->head.len = rep_pl->data_len;
|
|
kb->head.version = TOKVER_EP11_AES;
|
|
kb->head.keybitlen = keybitsize;
|
|
|
|
out:
|
|
kfree(req);
|
|
kfree(rep);
|
|
kfree(urb);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(ep11_genaeskey);
|
|
|
|
static int ep11_cryptsingle(u16 card, u16 domain,
|
|
u16 mode, u32 mech, const u8 *iv,
|
|
const u8 *key, size_t keysize,
|
|
const u8 *inbuf, size_t inbufsize,
|
|
u8 *outbuf, size_t *outbufsize)
|
|
{
|
|
struct crypt_req_pl {
|
|
struct pl_head head;
|
|
u8 var_tag;
|
|
u8 var_len;
|
|
u32 var;
|
|
u8 mech_tag;
|
|
u8 mech_len;
|
|
u32 mech;
|
|
/*
|
|
* maybe followed by iv data
|
|
* followed by key tag + key blob
|
|
* followed by plaintext tag + plaintext
|
|
*/
|
|
} __packed * req_pl;
|
|
struct crypt_rep_pl {
|
|
struct pl_head head;
|
|
u8 rc_tag;
|
|
u8 rc_len;
|
|
u32 rc;
|
|
u8 data_tag;
|
|
u8 data_lenfmt;
|
|
/* data follows */
|
|
} __packed * rep_pl;
|
|
struct ep11_cprb *req = NULL, *rep = NULL;
|
|
struct ep11_target_dev target;
|
|
struct ep11_urb *urb = NULL;
|
|
size_t req_pl_size, rep_pl_size;
|
|
int n, api = 1, rc = -ENOMEM;
|
|
u8 *p;
|
|
|
|
/* the simple asn1 coding used has length limits */
|
|
if (keysize > 0xFFFF || inbufsize > 0xFFFF)
|
|
return -EINVAL;
|
|
|
|
/* request cprb and payload */
|
|
req_pl_size = sizeof(struct crypt_req_pl) + (iv ? 16 : 0)
|
|
+ ASN1TAGLEN(keysize) + ASN1TAGLEN(inbufsize);
|
|
req = alloc_cprb(req_pl_size);
|
|
if (!req)
|
|
goto out;
|
|
req_pl = (struct crypt_req_pl *) (((u8 *) req) + sizeof(*req));
|
|
prep_head(&req_pl->head, req_pl_size, api, (mode ? 20 : 19));
|
|
req_pl->var_tag = 0x04;
|
|
req_pl->var_len = sizeof(u32);
|
|
/* mech is mech + mech params (iv here) */
|
|
req_pl->mech_tag = 0x04;
|
|
req_pl->mech_len = sizeof(u32) + (iv ? 16 : 0);
|
|
req_pl->mech = (mech ? mech : 0x00001085); /* CKM_AES_CBC_PAD */
|
|
p = ((u8 *) req_pl) + sizeof(*req_pl);
|
|
if (iv) {
|
|
memcpy(p, iv, 16);
|
|
p += 16;
|
|
}
|
|
/* key and input data */
|
|
p += asn1tag_write(p, 0x04, key, keysize);
|
|
p += asn1tag_write(p, 0x04, inbuf, inbufsize);
|
|
|
|
/* reply cprb and payload, assume out data size <= in data size + 32 */
|
|
rep_pl_size = sizeof(struct crypt_rep_pl) + ASN1TAGLEN(inbufsize + 32);
|
|
rep = alloc_cprb(rep_pl_size);
|
|
if (!rep)
|
|
goto out;
|
|
rep_pl = (struct crypt_rep_pl *) (((u8 *) rep) + sizeof(*rep));
|
|
|
|
/* urb and target */
|
|
urb = kmalloc(sizeof(struct ep11_urb), GFP_KERNEL);
|
|
if (!urb)
|
|
goto out;
|
|
target.ap_id = card;
|
|
target.dom_id = domain;
|
|
prep_urb(urb, &target, 1,
|
|
req, sizeof(*req) + req_pl_size,
|
|
rep, sizeof(*rep) + rep_pl_size);
|
|
|
|
rc = _zcrypt_send_ep11_cprb(urb);
|
|
if (rc) {
|
|
DEBUG_ERR(
|
|
"%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
|
|
__func__, (int) card, (int) domain, rc);
|
|
goto out;
|
|
}
|
|
|
|
rc = check_reply_pl((u8 *)rep_pl, __func__);
|
|
if (rc)
|
|
goto out;
|
|
if (rep_pl->data_tag != 0x04) {
|
|
DEBUG_ERR("%s unknown reply data format\n", __func__);
|
|
rc = -EIO;
|
|
goto out;
|
|
}
|
|
p = ((u8 *) rep_pl) + sizeof(*rep_pl);
|
|
if (rep_pl->data_lenfmt <= 127)
|
|
n = rep_pl->data_lenfmt;
|
|
else if (rep_pl->data_lenfmt == 0x81)
|
|
n = *p++;
|
|
else if (rep_pl->data_lenfmt == 0x82) {
|
|
n = *((u16 *) p);
|
|
p += 2;
|
|
} else {
|
|
DEBUG_ERR("%s unknown reply data length format 0x%02hhx\n",
|
|
__func__, rep_pl->data_lenfmt);
|
|
rc = -EIO;
|
|
goto out;
|
|
}
|
|
if (n > *outbufsize) {
|
|
DEBUG_ERR("%s mismatch reply data len %d / output buffer %zu\n",
|
|
__func__, n, *outbufsize);
|
|
rc = -ENOSPC;
|
|
goto out;
|
|
}
|
|
|
|
memcpy(outbuf, p, n);
|
|
*outbufsize = n;
|
|
|
|
out:
|
|
kfree(req);
|
|
kfree(rep);
|
|
kfree(urb);
|
|
return rc;
|
|
}
|
|
|
|
static int ep11_unwrapkey(u16 card, u16 domain,
|
|
const u8 *kek, size_t keksize,
|
|
const u8 *enckey, size_t enckeysize,
|
|
u32 mech, const u8 *iv,
|
|
u32 keybitsize, u32 keygenflags,
|
|
u8 *keybuf, size_t *keybufsize)
|
|
{
|
|
struct uw_req_pl {
|
|
struct pl_head head;
|
|
u8 attr_tag;
|
|
u8 attr_len;
|
|
u32 attr_header;
|
|
u32 attr_bool_mask;
|
|
u32 attr_bool_bits;
|
|
u32 attr_key_type;
|
|
u32 attr_key_type_value;
|
|
u32 attr_val_len;
|
|
u32 attr_val_len_value;
|
|
u8 mech_tag;
|
|
u8 mech_len;
|
|
u32 mech;
|
|
/*
|
|
* maybe followed by iv data
|
|
* followed by kek tag + kek blob
|
|
* followed by empty mac tag
|
|
* followed by empty pin tag
|
|
* followed by encryted key tag + bytes
|
|
*/
|
|
} __packed * req_pl;
|
|
struct uw_rep_pl {
|
|
struct pl_head head;
|
|
u8 rc_tag;
|
|
u8 rc_len;
|
|
u32 rc;
|
|
u8 data_tag;
|
|
u8 data_lenfmt;
|
|
u16 data_len;
|
|
u8 data[512];
|
|
} __packed * rep_pl;
|
|
struct ep11_cprb *req = NULL, *rep = NULL;
|
|
struct ep11_target_dev target;
|
|
struct ep11_urb *urb = NULL;
|
|
struct ep11keyblob *kb;
|
|
size_t req_pl_size;
|
|
int api, rc = -ENOMEM;
|
|
u8 *p;
|
|
|
|
/* request cprb and payload */
|
|
req_pl_size = sizeof(struct uw_req_pl) + (iv ? 16 : 0)
|
|
+ ASN1TAGLEN(keksize) + 4 + ASN1TAGLEN(enckeysize);
|
|
req = alloc_cprb(req_pl_size);
|
|
if (!req)
|
|
goto out;
|
|
req_pl = (struct uw_req_pl *) (((u8 *) req) + sizeof(*req));
|
|
api = (!keygenflags || keygenflags & 0x00200000) ? 4 : 1;
|
|
prep_head(&req_pl->head, req_pl_size, api, 34); /* UnwrapKey */
|
|
req_pl->attr_tag = 0x04;
|
|
req_pl->attr_len = 7 * sizeof(u32);
|
|
req_pl->attr_header = 0x10020000;
|
|
req_pl->attr_bool_mask = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
|
|
req_pl->attr_bool_bits = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS;
|
|
req_pl->attr_key_type = 0x00000100; /* CKA_KEY_TYPE */
|
|
req_pl->attr_key_type_value = 0x0000001f; /* CKK_AES */
|
|
req_pl->attr_val_len = 0x00000161; /* CKA_VALUE_LEN */
|
|
req_pl->attr_val_len_value = keybitsize / 8;
|
|
/* mech is mech + mech params (iv here) */
|
|
req_pl->mech_tag = 0x04;
|
|
req_pl->mech_len = sizeof(u32) + (iv ? 16 : 0);
|
|
req_pl->mech = (mech ? mech : 0x00001085); /* CKM_AES_CBC_PAD */
|
|
p = ((u8 *) req_pl) + sizeof(*req_pl);
|
|
if (iv) {
|
|
memcpy(p, iv, 16);
|
|
p += 16;
|
|
}
|
|
/* kek */
|
|
p += asn1tag_write(p, 0x04, kek, keksize);
|
|
/* empty mac key tag */
|
|
*p++ = 0x04;
|
|
*p++ = 0;
|
|
/* empty pin tag */
|
|
*p++ = 0x04;
|
|
*p++ = 0;
|
|
/* encrypted key value tag and bytes */
|
|
p += asn1tag_write(p, 0x04, enckey, enckeysize);
|
|
|
|
/* reply cprb and payload */
|
|
rep = alloc_cprb(sizeof(struct uw_rep_pl));
|
|
if (!rep)
|
|
goto out;
|
|
rep_pl = (struct uw_rep_pl *) (((u8 *) rep) + sizeof(*rep));
|
|
|
|
/* urb and target */
|
|
urb = kmalloc(sizeof(struct ep11_urb), GFP_KERNEL);
|
|
if (!urb)
|
|
goto out;
|
|
target.ap_id = card;
|
|
target.dom_id = domain;
|
|
prep_urb(urb, &target, 1,
|
|
req, sizeof(*req) + req_pl_size,
|
|
rep, sizeof(*rep) + sizeof(*rep_pl));
|
|
|
|
rc = _zcrypt_send_ep11_cprb(urb);
|
|
if (rc) {
|
|
DEBUG_ERR(
|
|
"%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
|
|
__func__, (int) card, (int) domain, rc);
|
|
goto out;
|
|
}
|
|
|
|
rc = check_reply_pl((u8 *)rep_pl, __func__);
|
|
if (rc)
|
|
goto out;
|
|
if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
|
|
DEBUG_ERR("%s unknown reply data format\n", __func__);
|
|
rc = -EIO;
|
|
goto out;
|
|
}
|
|
if (rep_pl->data_len > *keybufsize) {
|
|
DEBUG_ERR("%s mismatch reply data len / key buffer len\n",
|
|
__func__);
|
|
rc = -ENOSPC;
|
|
goto out;
|
|
}
|
|
|
|
/* copy key blob and set header values */
|
|
memcpy(keybuf, rep_pl->data, rep_pl->data_len);
|
|
*keybufsize = rep_pl->data_len;
|
|
kb = (struct ep11keyblob *) keybuf;
|
|
kb->head.type = TOKTYPE_NON_CCA;
|
|
kb->head.len = rep_pl->data_len;
|
|
kb->head.version = TOKVER_EP11_AES;
|
|
kb->head.keybitlen = keybitsize;
|
|
|
|
out:
|
|
kfree(req);
|
|
kfree(rep);
|
|
kfree(urb);
|
|
return rc;
|
|
}
|
|
|
|
static int ep11_wrapkey(u16 card, u16 domain,
|
|
const u8 *key, size_t keysize,
|
|
u32 mech, const u8 *iv,
|
|
u8 *databuf, size_t *datasize)
|
|
{
|
|
struct wk_req_pl {
|
|
struct pl_head head;
|
|
u8 var_tag;
|
|
u8 var_len;
|
|
u32 var;
|
|
u8 mech_tag;
|
|
u8 mech_len;
|
|
u32 mech;
|
|
/*
|
|
* followed by iv data
|
|
* followed by key tag + key blob
|
|
* followed by dummy kek param
|
|
* followed by dummy mac param
|
|
*/
|
|
} __packed * req_pl;
|
|
struct wk_rep_pl {
|
|
struct pl_head head;
|
|
u8 rc_tag;
|
|
u8 rc_len;
|
|
u32 rc;
|
|
u8 data_tag;
|
|
u8 data_lenfmt;
|
|
u16 data_len;
|
|
u8 data[512];
|
|
} __packed * rep_pl;
|
|
struct ep11_cprb *req = NULL, *rep = NULL;
|
|
struct ep11_target_dev target;
|
|
struct ep11_urb *urb = NULL;
|
|
struct ep11keyblob *kb;
|
|
size_t req_pl_size;
|
|
int api, rc = -ENOMEM;
|
|
u8 *p;
|
|
|
|
/* request cprb and payload */
|
|
req_pl_size = sizeof(struct wk_req_pl) + (iv ? 16 : 0)
|
|
+ ASN1TAGLEN(keysize) + 4;
|
|
req = alloc_cprb(req_pl_size);
|
|
if (!req)
|
|
goto out;
|
|
if (!mech || mech == 0x80060001)
|
|
req->flags |= 0x20; /* CPACF_WRAP needs special bit */
|
|
req_pl = (struct wk_req_pl *) (((u8 *) req) + sizeof(*req));
|
|
api = (!mech || mech == 0x80060001) ? 4 : 1; /* CKM_IBM_CPACF_WRAP */
|
|
prep_head(&req_pl->head, req_pl_size, api, 33); /* WrapKey */
|
|
req_pl->var_tag = 0x04;
|
|
req_pl->var_len = sizeof(u32);
|
|
/* mech is mech + mech params (iv here) */
|
|
req_pl->mech_tag = 0x04;
|
|
req_pl->mech_len = sizeof(u32) + (iv ? 16 : 0);
|
|
req_pl->mech = (mech ? mech : 0x80060001); /* CKM_IBM_CPACF_WRAP */
|
|
p = ((u8 *) req_pl) + sizeof(*req_pl);
|
|
if (iv) {
|
|
memcpy(p, iv, 16);
|
|
p += 16;
|
|
}
|
|
/* key blob */
|
|
p += asn1tag_write(p, 0x04, key, keysize);
|
|
/* maybe the key argument needs the head data cleaned out */
|
|
kb = (struct ep11keyblob *)(p - keysize);
|
|
if (kb->head.version == TOKVER_EP11_AES)
|
|
memset(&kb->head, 0, sizeof(kb->head));
|
|
/* empty kek tag */
|
|
*p++ = 0x04;
|
|
*p++ = 0;
|
|
/* empty mac tag */
|
|
*p++ = 0x04;
|
|
*p++ = 0;
|
|
|
|
/* reply cprb and payload */
|
|
rep = alloc_cprb(sizeof(struct wk_rep_pl));
|
|
if (!rep)
|
|
goto out;
|
|
rep_pl = (struct wk_rep_pl *) (((u8 *) rep) + sizeof(*rep));
|
|
|
|
/* urb and target */
|
|
urb = kmalloc(sizeof(struct ep11_urb), GFP_KERNEL);
|
|
if (!urb)
|
|
goto out;
|
|
target.ap_id = card;
|
|
target.dom_id = domain;
|
|
prep_urb(urb, &target, 1,
|
|
req, sizeof(*req) + req_pl_size,
|
|
rep, sizeof(*rep) + sizeof(*rep_pl));
|
|
|
|
rc = _zcrypt_send_ep11_cprb(urb);
|
|
if (rc) {
|
|
DEBUG_ERR(
|
|
"%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n",
|
|
__func__, (int) card, (int) domain, rc);
|
|
goto out;
|
|
}
|
|
|
|
rc = check_reply_pl((u8 *)rep_pl, __func__);
|
|
if (rc)
|
|
goto out;
|
|
if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) {
|
|
DEBUG_ERR("%s unknown reply data format\n", __func__);
|
|
rc = -EIO;
|
|
goto out;
|
|
}
|
|
if (rep_pl->data_len > *datasize) {
|
|
DEBUG_ERR("%s mismatch reply data len / data buffer len\n",
|
|
__func__);
|
|
rc = -ENOSPC;
|
|
goto out;
|
|
}
|
|
|
|
/* copy the data from the cprb to the data buffer */
|
|
memcpy(databuf, rep_pl->data, rep_pl->data_len);
|
|
*datasize = rep_pl->data_len;
|
|
|
|
out:
|
|
kfree(req);
|
|
kfree(rep);
|
|
kfree(urb);
|
|
return rc;
|
|
}
|
|
|
|
int ep11_clr2keyblob(u16 card, u16 domain, u32 keybitsize, u32 keygenflags,
|
|
const u8 *clrkey, u8 *keybuf, size_t *keybufsize)
|
|
{
|
|
int rc;
|
|
struct ep11keyblob *kb;
|
|
u8 encbuf[64], *kek = NULL;
|
|
size_t clrkeylen, keklen, encbuflen = sizeof(encbuf);
|
|
|
|
if (keybitsize == 128 || keybitsize == 192 || keybitsize == 256)
|
|
clrkeylen = keybitsize / 8;
|
|
else {
|
|
DEBUG_ERR(
|
|
"%s unknown/unsupported keybitsize %d\n",
|
|
__func__, keybitsize);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* allocate memory for the temp kek */
|
|
keklen = MAXEP11AESKEYBLOBSIZE;
|
|
kek = kmalloc(keklen, GFP_ATOMIC);
|
|
if (!kek) {
|
|
rc = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
/* Step 1: generate AES 256 bit random kek key */
|
|
rc = ep11_genaeskey(card, domain, 256,
|
|
0x00006c00, /* EN/DECRYPT, WRAP/UNWRAP */
|
|
kek, &keklen);
|
|
if (rc) {
|
|
DEBUG_ERR(
|
|
"%s generate kek key failed, rc=%d\n",
|
|
__func__, rc);
|
|
goto out;
|
|
}
|
|
kb = (struct ep11keyblob *) kek;
|
|
memset(&kb->head, 0, sizeof(kb->head));
|
|
|
|
/* Step 2: encrypt clear key value with the kek key */
|
|
rc = ep11_cryptsingle(card, domain, 0, 0, def_iv, kek, keklen,
|
|
clrkey, clrkeylen, encbuf, &encbuflen);
|
|
if (rc) {
|
|
DEBUG_ERR(
|
|
"%s encrypting key value with kek key failed, rc=%d\n",
|
|
__func__, rc);
|
|
goto out;
|
|
}
|
|
|
|
/* Step 3: import the encrypted key value as a new key */
|
|
rc = ep11_unwrapkey(card, domain, kek, keklen,
|
|
encbuf, encbuflen, 0, def_iv,
|
|
keybitsize, 0, keybuf, keybufsize);
|
|
if (rc) {
|
|
DEBUG_ERR(
|
|
"%s importing key value as new key failed,, rc=%d\n",
|
|
__func__, rc);
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
kfree(kek);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(ep11_clr2keyblob);
|
|
|
|
int ep11_key2protkey(u16 card, u16 dom, const u8 *key, size_t keylen,
|
|
u8 *protkey, u32 *protkeylen, u32 *protkeytype)
|
|
{
|
|
int rc = -EIO;
|
|
u8 *wkbuf = NULL;
|
|
size_t wkbuflen = 256;
|
|
struct wk_info {
|
|
u16 version;
|
|
u8 res1[16];
|
|
u32 pkeytype;
|
|
u32 pkeybitsize;
|
|
u64 pkeysize;
|
|
u8 res2[8];
|
|
u8 pkey[0];
|
|
} __packed * wki;
|
|
|
|
/* alloc temp working buffer */
|
|
wkbuf = kmalloc(wkbuflen, GFP_ATOMIC);
|
|
if (!wkbuf)
|
|
return -ENOMEM;
|
|
|
|
/* ep11 secure key -> protected key + info */
|
|
rc = ep11_wrapkey(card, dom, key, keylen,
|
|
0, def_iv, wkbuf, &wkbuflen);
|
|
if (rc) {
|
|
DEBUG_ERR(
|
|
"%s rewrapping ep11 key to pkey failed, rc=%d\n",
|
|
__func__, rc);
|
|
goto out;
|
|
}
|
|
wki = (struct wk_info *) wkbuf;
|
|
|
|
/* check struct version and pkey type */
|
|
if (wki->version != 1 || wki->pkeytype != 1) {
|
|
DEBUG_ERR("%s wk info version %d or pkeytype %d mismatch.\n",
|
|
__func__, (int) wki->version, (int) wki->pkeytype);
|
|
rc = -EIO;
|
|
goto out;
|
|
}
|
|
|
|
/* copy the tanslated protected key */
|
|
switch (wki->pkeysize) {
|
|
case 16+32:
|
|
/* AES 128 protected key */
|
|
if (protkeytype)
|
|
*protkeytype = PKEY_KEYTYPE_AES_128;
|
|
break;
|
|
case 24+32:
|
|
/* AES 192 protected key */
|
|
if (protkeytype)
|
|
*protkeytype = PKEY_KEYTYPE_AES_192;
|
|
break;
|
|
case 32+32:
|
|
/* AES 256 protected key */
|
|
if (protkeytype)
|
|
*protkeytype = PKEY_KEYTYPE_AES_256;
|
|
break;
|
|
default:
|
|
DEBUG_ERR("%s unknown/unsupported pkeysize %d\n",
|
|
__func__, (int) wki->pkeysize);
|
|
rc = -EIO;
|
|
goto out;
|
|
}
|
|
memcpy(protkey, wki->pkey, wki->pkeysize);
|
|
if (protkeylen)
|
|
*protkeylen = (u32) wki->pkeysize;
|
|
rc = 0;
|
|
|
|
out:
|
|
kfree(wkbuf);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(ep11_key2protkey);
|
|
|
|
int ep11_findcard2(u32 **apqns, u32 *nr_apqns, u16 cardnr, u16 domain,
|
|
int minhwtype, int minapi, const u8 *wkvp)
|
|
{
|
|
struct zcrypt_device_status_ext *device_status;
|
|
u32 *_apqns = NULL, _nr_apqns = 0;
|
|
int i, card, dom, rc = -ENOMEM;
|
|
struct ep11_domain_info edi;
|
|
struct ep11_card_info eci;
|
|
|
|
/* fetch status of all crypto cards */
|
|
device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT,
|
|
sizeof(struct zcrypt_device_status_ext),
|
|
GFP_KERNEL);
|
|
if (!device_status)
|
|
return -ENOMEM;
|
|
zcrypt_device_status_mask_ext(device_status);
|
|
|
|
/* allocate 1k space for up to 256 apqns */
|
|
_apqns = kmalloc_array(256, sizeof(u32), GFP_KERNEL);
|
|
if (!_apqns) {
|
|
kvfree(device_status);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* walk through all the crypto apqnss */
|
|
for (i = 0; i < MAX_ZDEV_ENTRIES_EXT; i++) {
|
|
card = AP_QID_CARD(device_status[i].qid);
|
|
dom = AP_QID_QUEUE(device_status[i].qid);
|
|
/* check online state */
|
|
if (!device_status[i].online)
|
|
continue;
|
|
/* check for ep11 functions */
|
|
if (!(device_status[i].functions & 0x01))
|
|
continue;
|
|
/* check cardnr */
|
|
if (cardnr != 0xFFFF && card != cardnr)
|
|
continue;
|
|
/* check domain */
|
|
if (domain != 0xFFFF && dom != domain)
|
|
continue;
|
|
/* check min hardware type */
|
|
if (minhwtype && device_status[i].hwtype < minhwtype)
|
|
continue;
|
|
/* check min api version if given */
|
|
if (minapi > 0) {
|
|
if (ep11_get_card_info(card, &eci, 0))
|
|
continue;
|
|
if (minapi > eci.API_ord_nr)
|
|
continue;
|
|
}
|
|
/* check wkvp if given */
|
|
if (wkvp) {
|
|
if (ep11_get_domain_info(card, dom, &edi))
|
|
continue;
|
|
if (edi.cur_wk_state != '1')
|
|
continue;
|
|
if (memcmp(wkvp, edi.cur_wkvp, 16))
|
|
continue;
|
|
}
|
|
/* apqn passed all filtering criterons, add to the array */
|
|
if (_nr_apqns < 256)
|
|
_apqns[_nr_apqns++] = (((u16)card) << 16) | ((u16) dom);
|
|
}
|
|
|
|
/* nothing found ? */
|
|
if (!_nr_apqns) {
|
|
kfree(_apqns);
|
|
rc = -ENODEV;
|
|
} else {
|
|
/* no re-allocation, simple return the _apqns array */
|
|
*apqns = _apqns;
|
|
*nr_apqns = _nr_apqns;
|
|
rc = 0;
|
|
}
|
|
|
|
kvfree(device_status);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL(ep11_findcard2);
|
|
|
|
void __exit zcrypt_ep11misc_exit(void)
|
|
{
|
|
card_cache_free();
|
|
}
|