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zircon-guest/third_party/linux/refs/heads/linux-7.3.y/./drivers/s390/crypto/zcrypt_ccamisc.c
blob: 19909bf43dc91ffbe329b421360589b6ad773ff7 [file] [edit]
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright IBM Corp. 2019
* Author(s): Harald Freudenberger <freude@linux.ibm.com>
* Ingo Franzki <ifranzki@linux.ibm.com>
*
* Collection of CCA misc functions used by zcrypt and pkey
*/
#define pr_fmt(fmt) "zcrypt: " fmt
#include <linux/export.h>
#include <linux/init.h>
#include <linux/mempool.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/random.h>
#include <linux/align.h>
#include <asm/zcrypt.h>
#include <asm/pkey.h>
#include "ap_bus.h"
#include "zcrypt_api.h"
#include "zcrypt_debug.h"
#include "zcrypt_msgtype6.h"
#include "zcrypt_ccamisc.h"
/* Size of parameter block used for all cca requests/replies */
#define PARMBSIZE 512
/* Size of vardata block used for some of the cca requests/replies */
#define VARDATASIZE 4096
/*
* Cprb memory pool held for urgent cases where no memory
* can be allocated via kmalloc. This pool is only used
* when alloc_and_prep_cprbmem() is called with the xflag
* ZCRYPT_XFLAG_NOMEMALLOC. The cprb memory needs to hold
* space for request AND reply!
*/
#define CPRB_MEMPOOL_ITEM_SIZE (16 * 1024)
static mempool_t *cprb_mempool;
/*
* This is a pre-allocated memory for the device status array
* used within the findcard() functions. It is currently
* 128 * 128 * 4 bytes = 64 KB big. Usage of this memory is
* controlled via dev_status_mem_mutex. Needs adaption if more
* than 128 cards or domains to be are supported.
*/
#define ZCRYPT_DEV_STATUS_CARD_MAX 128
#define ZCRYPT_DEV_STATUS_QUEUE_MAX 128
#define ZCRYPT_DEV_STATUS_ENTRIES (ZCRYPT_DEV_STATUS_CARD_MAX * \
ZCRYPT_DEV_STATUS_QUEUE_MAX)
#define ZCRYPT_DEV_STATUS_EXT_SIZE (ZCRYPT_DEV_STATUS_ENTRIES * \
sizeof(struct zcrypt_device_status_ext))
static void *dev_status_mem;
static DEFINE_MUTEX(dev_status_mem_mutex);
/*
* Simple check if the token is a valid CCA secure AES data key
* token. If keybitsize is given, the bitsize of the key is
* also checked. Returns 0 on success or errno value on failure.
*/
int cca_check_secaeskeytoken(debug_info_t *dbg, int dbflvl,
const u8 *token, u32 keysize, int keybitsize)
{
struct secaeskeytoken *t = (struct secaeskeytoken *)token;
#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
if (keysize < sizeof(*t)) {
if (dbg)
DBF("%s keysize %u < min token size %zu\n",
__func__, keysize, sizeof(*t));
return -EINVAL;
}
if (t->type != TOKTYPE_CCA_INTERNAL) {
if (dbg)
DBF("%s token check failed, type 0x%02x != 0x%02x\n",
__func__, (int)t->type, TOKTYPE_CCA_INTERNAL);
return -EINVAL;
}
if (t->version != TOKVER_CCA_AES) {
if (dbg)
DBF("%s token check failed, version 0x%02x != 0x%02x\n",
__func__, (int)t->version, TOKVER_CCA_AES);
return -EINVAL;
}
if (keybitsize > 0 && t->bitsize != keybitsize) {
if (dbg)
DBF("%s token check failed, bitsize %d != %d\n",
__func__, (int)t->bitsize, keybitsize);
return -EINVAL;
}
#undef DBF
return 0;
}
EXPORT_SYMBOL(cca_check_secaeskeytoken);
/*
* Simple check if the token is a valid CCA secure AES cipher key
* token. If keybitsize is given, the bitsize of the key is
* also checked. If checkcpacfexport is enabled, the key is also
* checked for the export flag to allow CPACF export.
* Returns 0 on success or errno value on failure.
*/
int cca_check_secaescipherkey(debug_info_t *dbg, int dbflvl,
const u8 *token, u32 keysize,
int keybitsize, int checkcpacfexport)
{
struct cipherkeytoken *t = (struct cipherkeytoken *)token;
bool keybitsizeok = true;
#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
if (keysize < sizeof(*t)) {
if (dbg)
DBF("%s keysize %u < min token size %zu\n",
__func__, keysize, sizeof(*t));
return -EINVAL;
}
if (t->type != TOKTYPE_CCA_INTERNAL) {
if (dbg)
DBF("%s token check failed, type 0x%02x != 0x%02x\n",
__func__, (int)t->type, TOKTYPE_CCA_INTERNAL);
return -EINVAL;
}
if (t->version != TOKVER_CCA_VLSC) {
if (dbg)
DBF("%s token check failed, version 0x%02x != 0x%02x\n",
__func__, (int)t->version, TOKVER_CCA_VLSC);
return -EINVAL;
}
if (t->len > keysize) {
if (dbg)
DBF("%s token check failed, len %d > keysize %u\n",
__func__, (int)t->len, keysize);
return -EINVAL;
}
if (t->len < sizeof(*t)) {
if (dbg)
DBF("%s token check failed, len %d < min token size %zu\n",
__func__, (int)t->len, sizeof(*t));
return -EINVAL;
}
if (t->algtype != 0x02) {
if (dbg)
DBF("%s token check failed, algtype 0x%02x != 0x02\n",
__func__, (int)t->algtype);
return -EINVAL;
}
if (t->keytype != 0x0001) {
if (dbg)
DBF("%s token check failed, keytype 0x%04x != 0x0001\n",
__func__, (int)t->keytype);
return -EINVAL;
}
if (t->plfver != 0x00 && t->plfver != 0x01) {
if (dbg)
DBF("%s token check failed, unknown plfver 0x%02x\n",
__func__, (int)t->plfver);
return -EINVAL;
}
if (t->wpllen != 512 && t->wpllen != 576 && t->wpllen != 640) {
if (dbg)
DBF("%s token check failed, unknown wpllen %d\n",
__func__, (int)t->wpllen);
return -EINVAL;
}
if (keybitsize > 0) {
switch (keybitsize) {
case 128:
if (t->wpllen != (t->plfver ? 640 : 512))
keybitsizeok = false;
break;
case 192:
if (t->wpllen != (t->plfver ? 640 : 576))
keybitsizeok = false;
break;
case 256:
if (t->wpllen != 640)
keybitsizeok = false;
break;
default:
keybitsizeok = false;
break;
}
if (!keybitsizeok) {
if (dbg)
DBF("%s token check failed, bitsize %d\n",
__func__, keybitsize);
return -EINVAL;
}
}
if (checkcpacfexport && !(t->kmf1 & KMF1_XPRT_CPAC)) {
if (dbg)
DBF("%s token check failed, XPRT_CPAC bit is 0\n",
__func__);
return -EINVAL;
}
#undef DBF
return 0;
}
EXPORT_SYMBOL(cca_check_secaescipherkey);
/*
* Simple check if the token is a valid CCA secure ECC private
* key token. Returns 0 on success or errno value on failure.
*/
int cca_check_sececckeytoken(debug_info_t *dbg, int dbflvl,
const u8 *token, u32 keysize,
int checkcpacfexport)
{
struct eccprivkeytoken *t = (struct eccprivkeytoken *)token;
#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
if (keysize < sizeof(*t)) {
if (dbg)
DBF("%s keysize %u < min token size %zu\n",
__func__, keysize, sizeof(*t));
return -EINVAL;
}
if (t->type != TOKTYPE_CCA_INTERNAL_PKA) {
if (dbg)
DBF("%s token check failed, type 0x%02x != 0x%02x\n",
__func__, (int)t->type, TOKTYPE_CCA_INTERNAL_PKA);
return -EINVAL;
}
if (t->len > keysize) {
if (dbg)
DBF("%s token check failed, len %d > keysize %u\n",
__func__, (int)t->len, keysize);
return -EINVAL;
}
if (t->len < sizeof(*t)) {
if (dbg)
DBF("%s token check failed, len %d < min token size %zu\n",
__func__, (int)t->len, sizeof(*t));
return -EINVAL;
}
if (t->secid != 0x20) {
if (dbg)
DBF("%s token check failed, secid 0x%02x != 0x20\n",
__func__, (int)t->secid);
return -EINVAL;
}
if (checkcpacfexport && !(t->kutc & 0x01)) {
if (dbg)
DBF("%s token check failed, XPRTCPAC bit is 0\n",
__func__);
return -EINVAL;
}
#undef DBF
return 0;
}
EXPORT_SYMBOL(cca_check_sececckeytoken);
/*
* Allocate consecutive memory for request CPRB, request param
* block, reply CPRB and reply param block and fill in values
* for the common fields. Returns 0 on success or errno value
* on failure.
* It is guaranteed that request and a possible param block
* are aligned to a 4 byte boundary. Furthermore if a param
* block is used, the memory allocated for this is rounded up to
* the next multiple of 4 bytes.
*/
static int alloc_and_prep_cprbmem(size_t paramblen,
u8 **p_cprb_mem,
struct CPRBX **p_req_cprb,
struct CPRBX **p_rep_cprb,
u32 xflags)
{
u8 *cprbmem = NULL;
size_t cprbplusparamblen =
ALIGN(sizeof(struct CPRBX), 4) + ALIGN(paramblen, 4);
size_t len = 2 * cprbplusparamblen;
struct CPRBX *preqcblk, *prepcblk;
/*
* allocate consecutive memory for request CPRB, request param
* block, reply CPRB and reply param block
*/
if (xflags & ZCRYPT_XFLAG_NOMEMALLOC) {
if (len <= CPRB_MEMPOOL_ITEM_SIZE)
cprbmem = mempool_alloc_preallocated(cprb_mempool);
} else {
cprbmem = kmalloc(len, GFP_KERNEL);
}
if (!cprbmem)
return -ENOMEM;
memset(cprbmem, 0, len);
preqcblk = (struct CPRBX *)cprbmem;
prepcblk = (struct CPRBX *)(cprbmem + cprbplusparamblen);
/* fill request cprb struct */
preqcblk->cprb_len = sizeof(struct CPRBX);
preqcblk->cprb_ver_id = 0x02;
memcpy(preqcblk->func_id, "T2", 2);
preqcblk->rpl_msgbl = cprbplusparamblen;
if (paramblen) {
preqcblk->req_parmb = ((u8 __user *)preqcblk) +
ALIGN(sizeof(struct CPRBX), 4);
preqcblk->rpl_parmb = ((u8 __user *)prepcblk) +
ALIGN(sizeof(struct CPRBX), 4);
}
*p_cprb_mem = cprbmem;
*p_req_cprb = preqcblk;
*p_rep_cprb = prepcblk;
return 0;
}
/*
* Free the cprb memory allocated with the function above.
* If the scrub value is not zero, the memory is filled
* with zeros before freeing (useful if there was some
* clear key material in there).
*/
static void free_cprbmem(void *mem, size_t paramblen, bool scrub, u32 xflags)
{
size_t cprblen = ALIGN(sizeof(struct CPRBX), 4) + ALIGN(paramblen, 4);
if (mem && scrub)
memzero_explicit(mem, 2 * cprblen);
if (xflags & ZCRYPT_XFLAG_NOMEMALLOC)
mempool_free(mem, cprb_mempool);
else
kfree(mem);
}
/*
* Helper function to prepare the xcrb struct
*/
static inline void prep_xcrb(struct ica_xcRB *pxcrb,
u16 cardnr,
struct CPRBX *preqcblk,
struct CPRBX *prepcblk)
{
memset(pxcrb, 0, sizeof(*pxcrb));
memcpy(&pxcrb->agent_ID, "CA", 2);
pxcrb->user_defined = (cardnr == 0xFFFF ? AUTOSELECT : cardnr);
pxcrb->request_control_blk_length =
preqcblk->cprb_len + preqcblk->req_parml;
pxcrb->request_control_blk_addr = (void __user *)preqcblk;
pxcrb->reply_control_blk_length = preqcblk->rpl_msgbl;
pxcrb->reply_control_blk_addr = (void __user *)prepcblk;
}
/*
* Generate (random) CCA AES DATA secure key.
*/
int cca_genseckey(u16 cardnr, u16 domain,
u32 keybitsize, u8 *seckey, u32 xflags)
{
int i, rc, keysize;
int seckeysize;
u8 *mem, *ptr;
struct CPRBX *preqcblk, *prepcblk;
struct ica_xcRB xcrb;
struct kgreqparm {
u8 subfunc_code[2];
u16 rule_array_len;
struct lv1 {
u16 len;
char key_form[8];
char key_length[8];
char key_type1[8];
char key_type2[8];
} lv1;
struct lv2 {
u16 len;
struct keyid {
u16 len;
u16 attr;
u8 data[SECKEYBLOBSIZE];
} keyid[6];
} lv2;
} __packed * preqparm;
struct kgrepparm {
u8 subfunc_code[2];
u16 rule_array_len;
struct lv3 {
u16 len;
u16 keyblocklen;
struct {
u16 toklen;
u16 tokattr;
u8 tok[];
/* ... some more data ... */
} keyblock;
} lv3;
} __packed * prepparm;
/* get already prepared memory for 2 cprbs with param block each */
rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem,
&preqcblk, &prepcblk, xflags);
if (rc)
return rc;
/* fill request cprb struct */
preqcblk->domain = domain;
/* fill request cprb param block with KG request */
preqparm = (struct kgreqparm __force *)preqcblk->req_parmb;
memcpy(preqparm->subfunc_code, "KG", 2);
preqparm->rule_array_len = sizeof(preqparm->rule_array_len);
preqparm->lv1.len = sizeof(struct lv1);
memcpy(preqparm->lv1.key_form, "OP ", 8);
switch (keybitsize) {
case PKEY_SIZE_AES_128:
case PKEY_KEYTYPE_AES_128: /* older ioctls used this */
keysize = 16;
memcpy(preqparm->lv1.key_length, "KEYLN16 ", 8);
break;
case PKEY_SIZE_AES_192:
case PKEY_KEYTYPE_AES_192: /* older ioctls used this */
keysize = 24;
memcpy(preqparm->lv1.key_length, "KEYLN24 ", 8);
break;
case PKEY_SIZE_AES_256:
case PKEY_KEYTYPE_AES_256: /* older ioctls used this */
keysize = 32;
memcpy(preqparm->lv1.key_length, "KEYLN32 ", 8);
break;
default:
ZCRYPT_DBF_ERR("%s unknown/unsupported keybitsize %d\n",
__func__, keybitsize);
rc = -EINVAL;
goto out;
}
memcpy(preqparm->lv1.key_type1, "AESDATA ", 8);
preqparm->lv2.len = sizeof(struct lv2);
for (i = 0; i < 6; i++) {
preqparm->lv2.keyid[i].len = sizeof(struct keyid);
preqparm->lv2.keyid[i].attr = (i == 2 ? 0x30 : 0x10);
}
preqcblk->req_parml = sizeof(struct kgreqparm);
/* fill xcrb struct */
prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
/* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
rc = zcrypt_send_cprb(&xcrb, xflags);
if (rc) {
ZCRYPT_DBF_ERR("%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, errno %d\n",
__func__, (int)cardnr, (int)domain, rc);
goto out;
}
/* check response returncode and reasoncode */
if (prepcblk->ccp_rtcode != 0) {
ZCRYPT_DBF_ERR("%s secure key generate failure, card response %d/%d\n",
__func__,
(int)prepcblk->ccp_rtcode,
(int)prepcblk->ccp_rscode);
rc = -EIO;
goto out;
}
/* process response cprb param block */
ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX);
prepcblk->rpl_parmb = (u8 __user *)ptr;
prepparm = (struct kgrepparm *)ptr;
/* check length of the returned secure key token */
seckeysize = prepparm->lv3.keyblock.toklen
- sizeof(prepparm->lv3.keyblock.toklen)
- sizeof(prepparm->lv3.keyblock.tokattr);
if (seckeysize != SECKEYBLOBSIZE) {
ZCRYPT_DBF_ERR("%s secure token size mismatch %d != %d bytes\n",
__func__, seckeysize, SECKEYBLOBSIZE);
rc = -EIO;
goto out;
}
/* check secure key token */
rc = cca_check_secaeskeytoken(zcrypt_dbf_info, DBF_ERR,
prepparm->lv3.keyblock.tok,
seckeysize, 8 * keysize);
if (rc) {
rc = -EIO;
goto out;
}
/* copy the generated secure key token */
memcpy(seckey, prepparm->lv3.keyblock.tok, SECKEYBLOBSIZE);
out:
free_cprbmem(mem, PARMBSIZE, false, xflags);
return rc;
}
EXPORT_SYMBOL(cca_genseckey);
/*
* Generate an CCA AES DATA secure key with given key value.
*/
int cca_clr2seckey(u16 cardnr, u16 domain, u32 keybitsize,
const u8 *clrkey, u8 *seckey, u32 xflags)
{
int rc, keysize, seckeysize;
u8 *mem, *ptr;
struct CPRBX *preqcblk, *prepcblk;
struct ica_xcRB xcrb;
struct cmreqparm {
u8 subfunc_code[2];
u16 rule_array_len;
char rule_array[8];
struct lv1 {
u16 len;
u8 clrkey[];
} lv1;
/* followed by struct lv2 */
} __packed * preqparm;
struct lv2 {
u16 len;
struct keyid {
u16 len;
u16 attr;
u8 data[SECKEYBLOBSIZE];
} keyid;
} __packed * plv2;
struct cmrepparm {
u8 subfunc_code[2];
u16 rule_array_len;
struct lv3 {
u16 len;
u16 keyblocklen;
struct {
u16 toklen;
u16 tokattr;
u8 tok[];
/* ... some more data ... */
} keyblock;
} lv3;
} __packed * prepparm;
/* get already prepared memory for 2 cprbs with param block each */
rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem,
&preqcblk, &prepcblk, xflags);
if (rc)
return rc;
/* fill request cprb struct */
preqcblk->domain = domain;
/* fill request cprb param block with CM request */
preqparm = (struct cmreqparm __force *)preqcblk->req_parmb;
memcpy(preqparm->subfunc_code, "CM", 2);
memcpy(preqparm->rule_array, "AES ", 8);
preqparm->rule_array_len =
sizeof(preqparm->rule_array_len) + sizeof(preqparm->rule_array);
switch (keybitsize) {
case PKEY_SIZE_AES_128:
case PKEY_KEYTYPE_AES_128: /* older ioctls used this */
keysize = 16;
break;
case PKEY_SIZE_AES_192:
case PKEY_KEYTYPE_AES_192: /* older ioctls used this */
keysize = 24;
break;
case PKEY_SIZE_AES_256:
case PKEY_KEYTYPE_AES_256: /* older ioctls used this */
keysize = 32;
break;
default:
ZCRYPT_DBF_ERR("%s unknown/unsupported keybitsize %d\n",
__func__, keybitsize);
rc = -EINVAL;
goto out;
}
preqparm->lv1.len = sizeof(struct lv1) + keysize;
memcpy(preqparm->lv1.clrkey, clrkey, keysize);
plv2 = (struct lv2 *)(((u8 *)preqparm) + sizeof(*preqparm) + keysize);
plv2->len = sizeof(struct lv2);
plv2->keyid.len = sizeof(struct keyid);
plv2->keyid.attr = 0x30;
preqcblk->req_parml = sizeof(*preqparm) + keysize + sizeof(*plv2);
/* fill xcrb struct */
prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
/* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
rc = zcrypt_send_cprb(&xcrb, xflags);
if (rc) {
ZCRYPT_DBF_ERR("%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, rc=%d\n",
__func__, (int)cardnr, (int)domain, rc);
goto out;
}
/* check response returncode and reasoncode */
if (prepcblk->ccp_rtcode != 0) {
ZCRYPT_DBF_ERR("%s clear key import failure, card response %d/%d\n",
__func__,
(int)prepcblk->ccp_rtcode,
(int)prepcblk->ccp_rscode);
rc = -EIO;
goto out;
}
/* process response cprb param block */
ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX);
prepcblk->rpl_parmb = (u8 __user *)ptr;
prepparm = (struct cmrepparm *)ptr;
/* check length of the returned secure key token */
seckeysize = prepparm->lv3.keyblock.toklen
- sizeof(prepparm->lv3.keyblock.toklen)
- sizeof(prepparm->lv3.keyblock.tokattr);
if (seckeysize != SECKEYBLOBSIZE) {
ZCRYPT_DBF_ERR("%s secure token size mismatch %d != %d bytes\n",
__func__, seckeysize, SECKEYBLOBSIZE);
rc = -EIO;
goto out;
}
/* check secure key token */
rc = cca_check_secaeskeytoken(zcrypt_dbf_info, DBF_ERR,
prepparm->lv3.keyblock.tok,
seckeysize, 8 * keysize);
if (rc) {
rc = -EIO;
goto out;
}
/* copy the generated secure key token */
if (seckey)
memcpy(seckey, prepparm->lv3.keyblock.tok, SECKEYBLOBSIZE);
out:
free_cprbmem(mem, PARMBSIZE, true, xflags);
return rc;
}
EXPORT_SYMBOL(cca_clr2seckey);
/*
* Derive proteced key from an CCA AES DATA secure key.
*/
int cca_sec2protkey(u16 cardnr, u16 domain,
const u8 *seckey, u8 *protkey, u32 *protkeylen,
u32 *protkeytype, u32 xflags)
{
int rc;
u8 *mem, *ptr;
struct CPRBX *preqcblk, *prepcblk;
struct ica_xcRB xcrb;
struct uskreqparm {
u8 subfunc_code[2];
u16 rule_array_len;
struct lv1 {
u16 len;
u16 attr_len;
u16 attr_flags;
} lv1;
struct lv2 {
u16 len;
u16 attr_len;
u16 attr_flags;
u8 token[]; /* cca secure key token */
} lv2;
} __packed * preqparm;
struct uskrepparm {
u8 subfunc_code[2];
u16 rule_array_len;
struct lv3 {
u16 len;
u16 attr_len;
u16 attr_flags;
struct cpacfkeyblock {
u8 version; /* version of this struct */
u8 flags[2];
u8 algo;
u8 form;
u8 pad1[3];
u16 len;
u8 key[64]; /* the key (len bytes) */
u16 keyattrlen;
u8 keyattr[32];
u8 pad2[1];
u8 vptype;
u8 vp[32]; /* verification pattern */
} ckb;
} lv3;
} __packed * prepparm;
/* get already prepared memory for 2 cprbs with param block each */
rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem,
&preqcblk, &prepcblk, xflags);
if (rc)
return rc;
/* fill request cprb struct */
preqcblk->domain = domain;
/* fill request cprb param block with USK request */
preqparm = (struct uskreqparm __force *)preqcblk->req_parmb;
memcpy(preqparm->subfunc_code, "US", 2);
preqparm->rule_array_len = sizeof(preqparm->rule_array_len);
preqparm->lv1.len = sizeof(struct lv1);
preqparm->lv1.attr_len = sizeof(struct lv1) - sizeof(preqparm->lv1.len);
preqparm->lv1.attr_flags = 0x0001;
preqparm->lv2.len = sizeof(struct lv2) + SECKEYBLOBSIZE;
preqparm->lv2.attr_len = sizeof(struct lv2)
- sizeof(preqparm->lv2.len) + SECKEYBLOBSIZE;
preqparm->lv2.attr_flags = 0x0000;
memcpy(preqparm->lv2.token, seckey, SECKEYBLOBSIZE);
preqcblk->req_parml = sizeof(struct uskreqparm) + SECKEYBLOBSIZE;
/* fill xcrb struct */
prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
/* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
rc = zcrypt_send_cprb(&xcrb, xflags);
if (rc) {
ZCRYPT_DBF_ERR("%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, rc=%d\n",
__func__, (int)cardnr, (int)domain, rc);
goto out;
}
/* check response returncode and reasoncode */
if (prepcblk->ccp_rtcode != 0) {
ZCRYPT_DBF_ERR("%s unwrap secure key failure, card response %d/%d\n",
__func__,
(int)prepcblk->ccp_rtcode,
(int)prepcblk->ccp_rscode);
if (prepcblk->ccp_rtcode == 8 && prepcblk->ccp_rscode == 2290)
rc = -EBUSY;
else
rc = -EIO;
goto out;
}
if (prepcblk->ccp_rscode != 0) {
ZCRYPT_DBF_WARN("%s unwrap secure key warning, card response %d/%d\n",
__func__,
(int)prepcblk->ccp_rtcode,
(int)prepcblk->ccp_rscode);
}
/* process response cprb param block */
ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX);
prepcblk->rpl_parmb = (u8 __user *)ptr;
prepparm = (struct uskrepparm *)ptr;
/* check the returned keyblock */
if (prepparm->lv3.ckb.version != 0x01 &&
prepparm->lv3.ckb.version != 0x02) {
ZCRYPT_DBF_ERR("%s reply param keyblock version mismatch 0x%02x\n",
__func__, (int)prepparm->lv3.ckb.version);
rc = -EIO;
goto out;
}
/* copy the translated protected key */
switch (prepparm->lv3.ckb.len) {
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:
ZCRYPT_DBF_ERR("%s unknown/unsupported keylen %d\n",
__func__, prepparm->lv3.ckb.len);
rc = -EIO;
goto out;
}
memcpy(protkey, prepparm->lv3.ckb.key, prepparm->lv3.ckb.len);
if (protkeylen)
*protkeylen = prepparm->lv3.ckb.len;
out:
free_cprbmem(mem, PARMBSIZE, true, xflags);
return rc;
}
EXPORT_SYMBOL(cca_sec2protkey);
/*
* AES cipher key skeleton created with CSNBKTB2 with these flags:
* INTERNAL, NO-KEY, AES, CIPHER, ANY-MODE, NOEX-SYM, NOEXAASY,
* NOEXUASY, XPRTCPAC, NOEX-RAW, NOEX-DES, NOEX-AES, NOEX-RSA
* used by cca_gencipherkey() and cca_clr2cipherkey().
*/
static const u8 aes_cipher_key_skeleton[] = {
0x01, 0x00, 0x00, 0x38, 0x05, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
0x00, 0x1a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x02, 0x00, 0x01, 0x02, 0xc0, 0x00, 0xff,
0x00, 0x03, 0x08, 0xc8, 0x00, 0x00, 0x00, 0x00 };
#define SIZEOF_SKELETON (sizeof(aes_cipher_key_skeleton))
/*
* Generate (random) CCA AES CIPHER secure key.
*/
int cca_gencipherkey(u16 cardnr, u16 domain, u32 keybitsize, u32 keygenflags,
u8 *keybuf, u32 *keybufsize, u32 xflags)
{
int rc;
u8 *mem, *ptr;
struct CPRBX *preqcblk, *prepcblk;
struct ica_xcRB xcrb;
struct gkreqparm {
u8 subfunc_code[2];
u16 rule_array_len;
char rule_array[2 * 8];
struct {
u16 len;
u8 key_type_1[8];
u8 key_type_2[8];
u16 clear_key_bit_len;
u16 key_name_1_len;
u16 key_name_2_len;
u16 user_data_1_len;
u16 user_data_2_len;
/* u8 key_name_1[]; */
/* u8 key_name_2[]; */
/* u8 user_data_1[]; */
/* u8 user_data_2[]; */
} vud;
struct {
u16 len;
struct {
u16 len;
u16 flag;
/* u8 kek_id_1[]; */
} tlv1;
struct {
u16 len;
u16 flag;
/* u8 kek_id_2[]; */
} tlv2;
struct {
u16 len;
u16 flag;
u8 gen_key_id_1[SIZEOF_SKELETON];
} tlv3;
struct {
u16 len;
u16 flag;
/* u8 gen_key_id_1_label[]; */
} tlv4;
struct {
u16 len;
u16 flag;
/* u8 gen_key_id_2[]; */
} tlv5;
struct {
u16 len;
u16 flag;
/* u8 gen_key_id_2_label[]; */
} tlv6;
} kb;
} __packed * preqparm;
struct gkrepparm {
u8 subfunc_code[2];
u16 rule_array_len;
struct {
u16 len;
} vud;
struct {
u16 len;
struct {
u16 len;
u16 flag;
u8 gen_key[]; /* 120-136 bytes */
} tlv1;
} kb;
} __packed * prepparm;
struct cipherkeytoken *t;
u32 keybuflen;
/* get already prepared memory for 2 cprbs with param block each */
rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem,
&preqcblk, &prepcblk, xflags);
if (rc)
return rc;
/* fill request cprb struct */
preqcblk->domain = domain;
preqcblk->req_parml = sizeof(struct gkreqparm);
/* prepare request param block with GK request */
preqparm = (struct gkreqparm __force *)preqcblk->req_parmb;
memcpy(preqparm->subfunc_code, "GK", 2);
preqparm->rule_array_len = sizeof(uint16_t) + 2 * 8;
memcpy(preqparm->rule_array, "AES OP ", 2 * 8);
/* prepare vud block */
preqparm->vud.len = sizeof(preqparm->vud);
switch (keybitsize) {
case 128:
case 192:
case 256:
break;
default:
ZCRYPT_DBF_ERR("%s unknown/unsupported keybitsize %d\n",
__func__, keybitsize);
rc = -EINVAL;
goto out;
}
preqparm->vud.clear_key_bit_len = keybitsize;
memcpy(preqparm->vud.key_type_1, "TOKEN ", 8);
memset(preqparm->vud.key_type_2, ' ', sizeof(preqparm->vud.key_type_2));
/* prepare kb block */
preqparm->kb.len = sizeof(preqparm->kb);
preqparm->kb.tlv1.len = sizeof(preqparm->kb.tlv1);
preqparm->kb.tlv1.flag = 0x0030;
preqparm->kb.tlv2.len = sizeof(preqparm->kb.tlv2);
preqparm->kb.tlv2.flag = 0x0030;
preqparm->kb.tlv3.len = sizeof(preqparm->kb.tlv3);
preqparm->kb.tlv3.flag = 0x0030;
memcpy(preqparm->kb.tlv3.gen_key_id_1,
aes_cipher_key_skeleton, SIZEOF_SKELETON);
preqparm->kb.tlv4.len = sizeof(preqparm->kb.tlv4);
preqparm->kb.tlv4.flag = 0x0030;
preqparm->kb.tlv5.len = sizeof(preqparm->kb.tlv5);
preqparm->kb.tlv5.flag = 0x0030;
preqparm->kb.tlv6.len = sizeof(preqparm->kb.tlv6);
preqparm->kb.tlv6.flag = 0x0030;
/* patch the skeleton key token export flags inside the kb block */
if (keygenflags) {
t = (struct cipherkeytoken *)preqparm->kb.tlv3.gen_key_id_1;
t->kmf1 |= (u16)(keygenflags & 0x0000FF00);
t->kmf1 &= (u16)~(keygenflags & 0x000000FF);
}
/* prepare xcrb struct */
prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
/* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
rc = zcrypt_send_cprb(&xcrb, xflags);
if (rc) {
ZCRYPT_DBF_ERR("%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, rc=%d\n",
__func__, (int)cardnr, (int)domain, rc);
goto out;
}
/* check response returncode and reasoncode */
if (prepcblk->ccp_rtcode != 0) {
ZCRYPT_DBF_ERR("%s cipher key generate failure, card response %d/%d\n",
__func__,
(int)prepcblk->ccp_rtcode,
(int)prepcblk->ccp_rscode);
rc = -EIO;
goto out;
}
/* process response cprb param block */
ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX);
prepcblk->rpl_parmb = (u8 __user *)ptr;
prepparm = (struct gkrepparm *)ptr;
/* do some plausibility checks on the key block */
if (prepparm->kb.len < 120 + 5 * sizeof(uint16_t) ||
prepparm->kb.len > 136 + 5 * sizeof(uint16_t)) {
ZCRYPT_DBF_ERR("%s reply with invalid or unknown key block\n",
__func__);
rc = -EIO;
goto out;
}
/* and some checks on the generated key */
t = (struct cipherkeytoken *)prepparm->kb.tlv1.gen_key;
if (prepparm->kb.tlv1.len < 2 * sizeof(uint16_t) + sizeof(*t)) {
rc = -EIO;
goto out;
}
keybuflen = prepparm->kb.tlv1.len - 2 * sizeof(uint16_t);
rc = cca_check_secaescipherkey(zcrypt_dbf_info, DBF_ERR,
prepparm->kb.tlv1.gen_key,
keybuflen, keybitsize, 1);
if (rc) {
rc = -EIO;
goto out;
}
/* copy the generated vlsc key token */
if (keybuf) {
if (*keybufsize >= keybuflen)
memcpy(keybuf, t, keybuflen);
else
rc = -EINVAL;
}
*keybufsize = keybuflen;
out:
free_cprbmem(mem, PARMBSIZE, false, xflags);
return rc;
}
EXPORT_SYMBOL(cca_gencipherkey);
/*
* Helper function, does a the CSNBKPI2 CPRB.
*/
static int _ip_cprb_helper(u16 cardnr, u16 domain,
const char *rule_array_1,
const char *rule_array_2,
const char *rule_array_3,
const u8 *clr_key_value,
int clr_key_bit_size,
u8 *key_token,
int *key_token_size,
u32 xflags,
bool scrub)
{
int rc, n;
u8 *mem, *ptr;
struct CPRBX *preqcblk, *prepcblk;
struct ica_xcRB xcrb;
struct rule_array_block {
u8 subfunc_code[2];
u16 rule_array_len;
char rule_array[];
} __packed * preq_ra_block;
struct vud_block {
u16 len;
struct {
u16 len;
u16 flag; /* 0x0064 */
u16 clr_key_bit_len;
} tlv1;
struct {
u16 len;
u16 flag; /* 0x0063 */
u8 clr_key[]; /* clear key value bytes */
} tlv2;
} __packed * preq_vud_block;
struct key_block {
u16 len;
struct {
u16 len;
u16 flag; /* 0x0030 */
u8 key_token[]; /* key skeleton */
} tlv1;
} __packed * preq_key_block;
struct iprepparm {
u8 subfunc_code[2];
u16 rule_array_len;
struct {
u16 len;
} vud;
struct {
u16 len;
struct {
u16 len;
u16 flag; /* 0x0030 */
u8 key_token[]; /* key token */
} tlv1;
} kb;
} __packed * prepparm;
struct cipherkeytoken *t;
int complete = strncmp(rule_array_2, "COMPLETE", 8) ? 0 : 1;
/* get already prepared memory for 2 cprbs with param block each */
rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem,
&preqcblk, &prepcblk, xflags);
if (rc)
return rc;
/* fill request cprb struct */
preqcblk->domain = domain;
preqcblk->req_parml = 0;
/* prepare request param block with IP request */
preq_ra_block = (struct rule_array_block __force *)preqcblk->req_parmb;
memcpy(preq_ra_block->subfunc_code, "IP", 2);
preq_ra_block->rule_array_len = sizeof(uint16_t) + 2 * 8;
memcpy(preq_ra_block->rule_array, rule_array_1, 8);
memcpy(preq_ra_block->rule_array + 8, rule_array_2, 8);
preqcblk->req_parml = sizeof(struct rule_array_block) + 2 * 8;
if (rule_array_3) {
preq_ra_block->rule_array_len += 8;
memcpy(preq_ra_block->rule_array + 16, rule_array_3, 8);
preqcblk->req_parml += 8;
}
/* prepare vud block */
preq_vud_block = (struct vud_block __force *)
(preqcblk->req_parmb + preqcblk->req_parml);
n = complete ? 0 : (clr_key_bit_size + 7) / 8;
preq_vud_block->len = sizeof(struct vud_block) + n;
preq_vud_block->tlv1.len = sizeof(preq_vud_block->tlv1);
preq_vud_block->tlv1.flag = 0x0064;
preq_vud_block->tlv1.clr_key_bit_len = complete ? 0 : clr_key_bit_size;
preq_vud_block->tlv2.len = sizeof(preq_vud_block->tlv2) + n;
preq_vud_block->tlv2.flag = 0x0063;
if (!complete)
memcpy(preq_vud_block->tlv2.clr_key, clr_key_value, n);
preqcblk->req_parml += preq_vud_block->len;
/* prepare key block */
preq_key_block = (struct key_block __force *)
(preqcblk->req_parmb + preqcblk->req_parml);
n = *key_token_size;
preq_key_block->len = sizeof(struct key_block) + n;
preq_key_block->tlv1.len = sizeof(preq_key_block->tlv1) + n;
preq_key_block->tlv1.flag = 0x0030;
memcpy(preq_key_block->tlv1.key_token, key_token, *key_token_size);
preqcblk->req_parml += preq_key_block->len;
/* prepare xcrb struct */
prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
/* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
rc = zcrypt_send_cprb(&xcrb, xflags);
if (rc) {
ZCRYPT_DBF_ERR("%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, rc=%d\n",
__func__, (int)cardnr, (int)domain, rc);
goto out;
}
/* check response returncode and reasoncode */
if (prepcblk->ccp_rtcode != 0) {
ZCRYPT_DBF_ERR("%s CSNBKPI2 failure, card response %d/%d\n",
__func__,
(int)prepcblk->ccp_rtcode,
(int)prepcblk->ccp_rscode);
rc = -EIO;
goto out;
}
/* process response cprb param block */
ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX);
prepcblk->rpl_parmb = (u8 __user *)ptr;
prepparm = (struct iprepparm *)ptr;
/* do some plausibility checks on the key block */
if (prepparm->kb.len < 120 + 3 * sizeof(uint16_t) ||
prepparm->kb.len > 136 + 3 * sizeof(uint16_t)) {
ZCRYPT_DBF_ERR("%s reply with invalid or unknown key block\n",
__func__);
rc = -EIO;
goto out;
}
/* do not check the key here, it may be incomplete */
/*
* Copy the vlsc key token back.
* The available space in the destination (key_token) and the source
* (t) buffer is always larger as the valid range of prepparm->kb.len.
* Validate t->len by comparing it with the length information in the
* param block of the request (prepparm->kb.len)
* The value range of prepparm->kb.len has been checked above.
*/
t = (struct cipherkeytoken *)prepparm->kb.tlv1.key_token;
if (t->len != prepparm->kb.len - 3 * sizeof(uint16_t)) {
ZCRYPT_DBF_ERR("%s reply with invalid key_token length %u\n",
__func__, t->len);
rc = -EIO;
goto out;
}
memcpy(key_token, t, t->len);
*key_token_size = t->len;
out:
free_cprbmem(mem, PARMBSIZE, scrub, xflags);
return rc;
}
/*
* Build CCA AES CIPHER secure key with a given clear key value.
*/
int cca_clr2cipherkey(u16 card, u16 dom, u32 keybitsize, u32 keygenflags,
const u8 *clrkey, u8 *keybuf, u32 *keybufsize, u32 xflags)
{
int rc;
void *mem;
int tokensize;
u8 *token, exorbuf[32];
struct cipherkeytoken *t;
/* fill exorbuf with random data */
get_random_bytes(exorbuf, sizeof(exorbuf));
/*
* Allocate space for the key token to build.
* Also we only need up to MAXCCAVLSCTOKENSIZE bytes for this
* we use the already existing cprb mempool to solve this
* short term memory requirement.
*/
mem = (xflags & ZCRYPT_XFLAG_NOMEMALLOC) ?
mempool_alloc_preallocated(cprb_mempool) :
mempool_alloc(cprb_mempool, GFP_KERNEL);
if (!mem)
return -ENOMEM;
/* prepare the token with the key skeleton */
token = (u8 *)mem;
tokensize = SIZEOF_SKELETON;
memcpy(token, aes_cipher_key_skeleton, tokensize);
/* patch the skeleton key token export flags */
if (keygenflags) {
t = (struct cipherkeytoken *)token;
t->kmf1 |= (u16)(keygenflags & 0x0000FF00);
t->kmf1 &= (u16)~(keygenflags & 0x000000FF);
}
/*
* Do the key import with the clear key value in 4 steps:
* 1/4 FIRST import with only random data
* 2/4 EXOR the clear key
* 3/4 EXOR the very same random data again
* 4/4 COMPLETE the secure cipher key import
*/
rc = _ip_cprb_helper(card, dom, "AES ", "FIRST ", "MIN3PART",
exorbuf, keybitsize, token, &tokensize,
xflags, true);
if (rc) {
ZCRYPT_DBF_ERR("%s clear key import 1/4 with CSNBKPI2 failed, rc=%d\n",
__func__, rc);
goto out;
}
rc = _ip_cprb_helper(card, dom, "AES ", "ADD-PART", NULL,
clrkey, keybitsize, token, &tokensize,
xflags, true);
if (rc) {
ZCRYPT_DBF_ERR("%s clear key import 2/4 with CSNBKPI2 failed, rc=%d\n",
__func__, rc);
goto out;
}
rc = _ip_cprb_helper(card, dom, "AES ", "ADD-PART", NULL,
exorbuf, keybitsize, token, &tokensize,
xflags, true);
if (rc) {
ZCRYPT_DBF_ERR("%s clear key import 3/4 with CSNBKPI2 failed, rc=%d\n",
__func__, rc);
goto out;
}
rc = _ip_cprb_helper(card, dom, "AES ", "COMPLETE", NULL,
NULL, keybitsize, token, &tokensize,
xflags, true);
if (rc) {
ZCRYPT_DBF_ERR("%s clear key import 4/4 with CSNBKPI2 failed, rc=%d\n",
__func__, rc);
goto out;
}
/* copy the generated key token */
if (keybuf) {
if (tokensize > *keybufsize)
rc = -EINVAL;
else
memcpy(keybuf, token, tokensize);
}
*keybufsize = tokensize;
out:
memzero_explicit(exorbuf, sizeof(exorbuf));
memzero_explicit(mem, CPRB_MEMPOOL_ITEM_SIZE);
mempool_free(mem, cprb_mempool);
return rc;
}
EXPORT_SYMBOL(cca_clr2cipherkey);
/*
* Derive proteced key from CCA AES cipher secure key.
*/
int cca_cipher2protkey(u16 cardnr, u16 domain, const u8 *ckey,
u8 *protkey, u32 *protkeylen, u32 *protkeytype,
u32 xflags)
{
int rc;
u8 *mem, *ptr;
struct CPRBX *preqcblk, *prepcblk;
struct ica_xcRB xcrb;
struct aureqparm {
u8 subfunc_code[2];
u16 rule_array_len;
u8 rule_array[8];
struct {
u16 len;
u16 tk_blob_len;
u16 tk_blob_tag;
u8 tk_blob[66];
} vud;
struct {
u16 len;
u16 cca_key_token_len;
u16 cca_key_token_flags;
u8 cca_key_token[]; /* 64 or more */
} kb;
} __packed * preqparm;
struct aurepparm {
u8 subfunc_code[2];
u16 rule_array_len;
struct {
u16 len;
u16 sublen;
u16 tag;
struct cpacfkeyblock {
u8 version; /* version of this struct */
u8 flags[2];
u8 algo;
u8 form;
u8 pad1[3];
u16 keylen;
u8 key[64]; /* the key (keylen bytes) */
u16 keyattrlen;
u8 keyattr[32];
u8 pad2[1];
u8 vptype;
u8 vp[32]; /* verification pattern */
} ckb;
} vud;
struct {
u16 len;
} kb;
} __packed * prepparm;
int keytoklen = ((struct cipherkeytoken *)ckey)->len;
if (keytoklen > PARMBSIZE - sizeof(struct aureqparm))
return -EINVAL;
/* get already prepared memory for 2 cprbs with param block each */
rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem,
&preqcblk, &prepcblk, xflags);
if (rc)
return rc;
/* fill request cprb struct */
preqcblk->domain = domain;
/* fill request cprb param block with AU request */
preqparm = (struct aureqparm __force *)preqcblk->req_parmb;
memcpy(preqparm->subfunc_code, "AU", 2);
preqparm->rule_array_len =
sizeof(preqparm->rule_array_len)
+ sizeof(preqparm->rule_array);
memcpy(preqparm->rule_array, "EXPT-SK ", 8);
/* vud, tk blob */
preqparm->vud.len = sizeof(preqparm->vud);
preqparm->vud.tk_blob_len = sizeof(preqparm->vud.tk_blob)
+ 2 * sizeof(uint16_t);
preqparm->vud.tk_blob_tag = 0x00C2;
/* kb, cca token */
preqparm->kb.len = keytoklen + 3 * sizeof(uint16_t);
preqparm->kb.cca_key_token_len = keytoklen + 2 * sizeof(uint16_t);
memcpy(preqparm->kb.cca_key_token, ckey, keytoklen);
/* now fill length of param block into cprb */
preqcblk->req_parml = sizeof(struct aureqparm) + keytoklen;
/* fill xcrb struct */
prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
/* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
rc = zcrypt_send_cprb(&xcrb, xflags);
if (rc) {
ZCRYPT_DBF_ERR("%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, rc=%d\n",
__func__, (int)cardnr, (int)domain, rc);
goto out;
}
/* check response returncode and reasoncode */
if (prepcblk->ccp_rtcode != 0) {
ZCRYPT_DBF_ERR("%s unwrap secure key failure, card response %d/%d\n",
__func__,
(int)prepcblk->ccp_rtcode,
(int)prepcblk->ccp_rscode);
if (prepcblk->ccp_rtcode == 8 && prepcblk->ccp_rscode == 2290)
rc = -EBUSY;
else
rc = -EIO;
goto out;
}
if (prepcblk->ccp_rscode != 0) {
ZCRYPT_DBF_WARN("%s unwrap secure key warning, card response %d/%d\n",
__func__,
(int)prepcblk->ccp_rtcode,
(int)prepcblk->ccp_rscode);
}
/* process response cprb param block */
ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX);
prepcblk->rpl_parmb = (u8 __user *)ptr;
prepparm = (struct aurepparm *)ptr;
/* check the returned keyblock */
if (prepparm->vud.ckb.version != 0x01 &&
prepparm->vud.ckb.version != 0x02) {
ZCRYPT_DBF_ERR("%s reply param keyblock version mismatch 0x%02x\n",
__func__, (int)prepparm->vud.ckb.version);
rc = -EIO;
goto out;
}
if (prepparm->vud.ckb.algo != 0x02) {
ZCRYPT_DBF_ERR("%s reply param keyblock algo mismatch 0x%02x != 0x02\n",
__func__, (int)prepparm->vud.ckb.algo);
rc = -EIO;
goto out;
}
/* copy the translated protected key */
switch (prepparm->vud.ckb.keylen) {
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:
ZCRYPT_DBF_ERR("%s unknown/unsupported keylen %d\n",
__func__, prepparm->vud.ckb.keylen);
rc = -EIO;
goto out;
}
memcpy(protkey, prepparm->vud.ckb.key, prepparm->vud.ckb.keylen);
if (protkeylen)
*protkeylen = prepparm->vud.ckb.keylen;
out:
free_cprbmem(mem, PARMBSIZE, true, xflags);
return rc;
}
EXPORT_SYMBOL(cca_cipher2protkey);
/*
* Derive protected key from CCA ECC secure private key.
*/
int cca_ecc2protkey(u16 cardnr, u16 domain, const u8 *key,
u8 *protkey, u32 *protkeylen, u32 *protkeytype, u32 xflags)
{
int rc;
u8 *mem, *ptr;
struct CPRBX *preqcblk, *prepcblk;
struct ica_xcRB xcrb;
struct aureqparm {
u8 subfunc_code[2];
u16 rule_array_len;
u8 rule_array[8];
struct {
u16 len;
u16 tk_blob_len;
u16 tk_blob_tag;
u8 tk_blob[66];
} vud;
struct {
u16 len;
u16 cca_key_token_len;
u16 cca_key_token_flags;
u8 cca_key_token[];
} kb;
} __packed * preqparm;
struct aurepparm {
u8 subfunc_code[2];
u16 rule_array_len;
struct {
u16 len;
u16 sublen;
u16 tag;
struct cpacfkeyblock {
u8 version; /* version of this struct */
u8 flags[2];
u8 algo;
u8 form;
u8 pad1[3];
u16 keylen;
u8 key[]; /* the key (keylen bytes) */
/* u16 keyattrlen; */
/* u8 keyattr[32]; */
/* u8 pad2[1]; */
/* u8 vptype; */
/* u8 vp[32]; verification pattern */
} ckb;
} vud;
/* followed by a key block */
} __packed * prepparm;
int keylen = ((struct eccprivkeytoken *)key)->len;
if (keylen > PARMBSIZE - sizeof(struct aureqparm))
return -EINVAL;
/* get already prepared memory for 2 cprbs with param block each */
rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem,
&preqcblk, &prepcblk, xflags);
if (rc)
return rc;
/* fill request cprb struct */
preqcblk->domain = domain;
/* fill request cprb param block with AU request */
preqparm = (struct aureqparm __force *)preqcblk->req_parmb;
memcpy(preqparm->subfunc_code, "AU", 2);
preqparm->rule_array_len =
sizeof(preqparm->rule_array_len)
+ sizeof(preqparm->rule_array);
memcpy(preqparm->rule_array, "EXPT-SK ", 8);
/* vud, tk blob */
preqparm->vud.len = sizeof(preqparm->vud);
preqparm->vud.tk_blob_len = sizeof(preqparm->vud.tk_blob)
+ 2 * sizeof(uint16_t);
preqparm->vud.tk_blob_tag = 0x00C2;
/* kb, cca token */
preqparm->kb.len = keylen + 3 * sizeof(uint16_t);
preqparm->kb.cca_key_token_len = keylen + 2 * sizeof(uint16_t);
memcpy(preqparm->kb.cca_key_token, key, keylen);
/* now fill length of param block into cprb */
preqcblk->req_parml = sizeof(struct aureqparm) + keylen;
/* fill xcrb struct */
prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
/* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
rc = zcrypt_send_cprb(&xcrb, xflags);
if (rc) {
ZCRYPT_DBF_ERR("%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, rc=%d\n",
__func__, (int)cardnr, (int)domain, rc);
goto out;
}
/* check response returncode and reasoncode */
if (prepcblk->ccp_rtcode != 0) {
ZCRYPT_DBF_ERR("%s unwrap secure key failure, card response %d/%d\n",
__func__,
(int)prepcblk->ccp_rtcode,
(int)prepcblk->ccp_rscode);
if (prepcblk->ccp_rtcode == 8 && prepcblk->ccp_rscode == 2290)
rc = -EBUSY;
else
rc = -EIO;
goto out;
}
if (prepcblk->ccp_rscode != 0) {
ZCRYPT_DBF_WARN("%s unwrap secure key warning, card response %d/%d\n",
__func__,
(int)prepcblk->ccp_rtcode,
(int)prepcblk->ccp_rscode);
}
/* process response cprb param block */
ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX);
prepcblk->rpl_parmb = (u8 __user *)ptr;
prepparm = (struct aurepparm *)ptr;
/* check the returned keyblock */
if (prepparm->vud.ckb.version != 0x02) {
ZCRYPT_DBF_ERR("%s reply param keyblock version mismatch 0x%02x != 0x02\n",
__func__, (int)prepparm->vud.ckb.version);
rc = -EIO;
goto out;
}
if (prepparm->vud.ckb.algo != 0x81) {
ZCRYPT_DBF_ERR("%s reply param keyblock algo mismatch 0x%02x != 0x81\n",
__func__, (int)prepparm->vud.ckb.algo);
rc = -EIO;
goto out;
}
/* copy the translated protected key */
if (prepparm->vud.ckb.keylen > *protkeylen) {
ZCRYPT_DBF_ERR("%s prot keylen mismatch %d > buffersize %u\n",
__func__, prepparm->vud.ckb.keylen, *protkeylen);
rc = -EIO;
goto out;
}
memcpy(protkey, prepparm->vud.ckb.key, prepparm->vud.ckb.keylen);
*protkeylen = prepparm->vud.ckb.keylen;
if (protkeytype)
*protkeytype = PKEY_KEYTYPE_ECC;
out:
free_cprbmem(mem, PARMBSIZE, true, xflags);
return rc;
}
EXPORT_SYMBOL(cca_ecc2protkey);
/*
* query cryptographic facility from CCA adapter
*/
int cca_query_crypto_facility(u16 cardnr, u16 domain,
const char *keyword,
u8 *rarray, size_t *rarraylen,
u8 *varray, size_t *varraylen,
u32 xflags)
{
int rc;
u16 len;
u8 *mem, *ptr;
struct CPRBX *preqcblk, *prepcblk;
struct ica_xcRB xcrb;
struct fqreqparm {
u8 subfunc_code[2];
u16 rule_array_len;
char rule_array[8];
struct lv1 {
u16 len;
u8 data[VARDATASIZE];
} lv1;
u16 dummylen;
} __packed * preqparm;
size_t parmbsize = sizeof(struct fqreqparm);
struct fqrepparm {
u8 subfunc_code[2];
u8 lvdata[];
} __packed * prepparm;
/* get already prepared memory for 2 cprbs with param block each */
rc = alloc_and_prep_cprbmem(parmbsize, &mem,
&preqcblk, &prepcblk, xflags);
if (rc)
return rc;
/* fill request cprb struct */
preqcblk->domain = domain;
/* fill request cprb param block with FQ request */
preqparm = (struct fqreqparm __force *)preqcblk->req_parmb;
memcpy(preqparm->subfunc_code, "FQ", 2);
memcpy(preqparm->rule_array, keyword, sizeof(preqparm->rule_array));
preqparm->rule_array_len =
sizeof(preqparm->rule_array_len) + sizeof(preqparm->rule_array);
preqparm->lv1.len = sizeof(preqparm->lv1);
preqparm->dummylen = sizeof(preqparm->dummylen);
preqcblk->req_parml = parmbsize;
/* fill xcrb struct */
prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk);
/* forward xcrb with request CPRB and reply CPRB to zcrypt dd */
rc = zcrypt_send_cprb(&xcrb, xflags);
if (rc) {
ZCRYPT_DBF_ERR("%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, rc=%d\n",
__func__, (int)cardnr, (int)domain, rc);
goto out;
}
/* check response returncode and reasoncode */
if (prepcblk->ccp_rtcode != 0) {
ZCRYPT_DBF_ERR("%s unwrap secure key failure, card response %d/%d\n",
__func__,
(int)prepcblk->ccp_rtcode,
(int)prepcblk->ccp_rscode);
rc = -EIO;
goto out;
}
/* process response cprb param block */
ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX);
prepcblk->rpl_parmb = (u8 __user *)ptr;
prepparm = (struct fqrepparm *)ptr;
ptr = prepparm->lvdata;
/* check and possibly copy reply rule array */
len = *((u16 *)ptr);
if (len > sizeof(u16)) {
ptr += sizeof(u16);
len -= sizeof(u16);
if (rarray && rarraylen && *rarraylen > 0) {
*rarraylen = (len > *rarraylen ? *rarraylen : len);
memcpy(rarray, ptr, *rarraylen);
}
ptr += len;
}
/* check and possible copy reply var array */
len = *((u16 *)ptr);
if (len > sizeof(u16)) {
ptr += sizeof(u16);
len -= sizeof(u16);
if (varray && varraylen && *varraylen > 0) {
*varraylen = (len > *varraylen ? *varraylen : len);
memcpy(varray, ptr, *varraylen);
}
ptr += len;
}
out:
free_cprbmem(mem, parmbsize, false, xflags);
return rc;
}
EXPORT_SYMBOL(cca_query_crypto_facility);
/*
* Fetch cca_info values about a CCA queue via
* query_crypto_facility from adapter.
*/
int cca_get_info(u16 cardnr, u16 domain, struct cca_info *ci, u32 xflags)
{
void *mem;
int rc, found = 0;
size_t rlen, vlen;
u8 *rarray, *varray;
struct zcrypt_device_status_ext devstat;
memset(ci, 0, sizeof(*ci));
/* if specific domain given, fetch status and hw info for this apqn */
if (domain != AUTOSEL_DOM) {
rc = zcrypt_device_status_ext(cardnr, domain, &devstat);
if (rc)
return rc;
ci->hwtype = devstat.hwtype;
}
/*
* Prep memory for rule array and var array use.
* Use the cprb mempool for this.
*/
mem = (xflags & ZCRYPT_XFLAG_NOMEMALLOC) ?
mempool_alloc_preallocated(cprb_mempool) :
mempool_alloc(cprb_mempool, GFP_KERNEL);
if (!mem)
return -ENOMEM;
rarray = (u8 *)mem;
varray = (u8 *)mem + PAGE_SIZE / 2;
rlen = vlen = PAGE_SIZE / 2;
/* QF for this card/domain */
rc = cca_query_crypto_facility(cardnr, domain, "STATICSA",
rarray, &rlen, varray, &vlen, xflags);
if (rc == 0 && rlen >= 10 * 8 && vlen >= 204) {
memcpy(ci->serial, rarray, 8);
ci->new_asym_mk_state = (char)rarray[4 * 8];
ci->cur_asym_mk_state = (char)rarray[5 * 8];
ci->old_asym_mk_state = (char)rarray[6 * 8];
if (ci->old_asym_mk_state == '2')
memcpy(ci->old_asym_mkvp, varray + 64, 16);
if (ci->cur_asym_mk_state == '2')
memcpy(ci->cur_asym_mkvp, varray + 84, 16);
if (ci->new_asym_mk_state == '3')
memcpy(ci->new_asym_mkvp, varray + 104, 16);
ci->new_aes_mk_state = (char)rarray[7 * 8];
ci->cur_aes_mk_state = (char)rarray[8 * 8];
ci->old_aes_mk_state = (char)rarray[9 * 8];
if (ci->old_aes_mk_state == '2')
memcpy(&ci->old_aes_mkvp, varray + 172, 8);
if (ci->cur_aes_mk_state == '2')
memcpy(&ci->cur_aes_mkvp, varray + 184, 8);
if (ci->new_aes_mk_state == '3')
memcpy(&ci->new_aes_mkvp, varray + 196, 8);
found++;
}
if (!found)
goto out;
rlen = vlen = PAGE_SIZE / 2;
rc = cca_query_crypto_facility(cardnr, domain, "STATICSB",
rarray, &rlen, varray, &vlen, xflags);
if (rc == 0 && rlen >= 13 * 8 && vlen >= 240) {
ci->new_apka_mk_state = (char)rarray[10 * 8];
ci->cur_apka_mk_state = (char)rarray[11 * 8];
ci->old_apka_mk_state = (char)rarray[12 * 8];
if (ci->old_apka_mk_state == '2')
memcpy(&ci->old_apka_mkvp, varray + 208, 8);
if (ci->cur_apka_mk_state == '2')
memcpy(&ci->cur_apka_mkvp, varray + 220, 8);
if (ci->new_apka_mk_state == '3')
memcpy(&ci->new_apka_mkvp, varray + 232, 8);
found++;
}
out:
mempool_free(mem, cprb_mempool);
return found == 2 ? 0 : -ENOENT;
}
EXPORT_SYMBOL(cca_get_info);
int cca_findcard2(u32 *apqns, u32 *nr_apqns, u16 cardnr, u16 domain,
int minhwtype, int mktype,
const u8 *ptr_cur_mkvp, const u8 *ptr_old_mkvp, u32 xflags)
{
struct zcrypt_device_status_ext *device_status;
int i, card, dom, curmatch, oldmatch;
struct cca_info ci;
u32 _nr_apqns = 0;
/* occupy the device status memory */
mutex_lock(&dev_status_mem_mutex);
memset(dev_status_mem, 0, ZCRYPT_DEV_STATUS_EXT_SIZE);
device_status = (struct zcrypt_device_status_ext *)dev_status_mem;
/* fetch crypto device status into this struct */
zcrypt_device_status_mask_ext(device_status,
ZCRYPT_DEV_STATUS_CARD_MAX,
ZCRYPT_DEV_STATUS_QUEUE_MAX);
/* walk through all the crypto apqnss */
for (i = 0; i < ZCRYPT_DEV_STATUS_ENTRIES; 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 cca functions */
if (!(device_status[i].functions & 0x04))
continue;
/* check cardnr */
if (cardnr != 0xFFFF && card != cardnr)
continue;
/* check domain */
if (domain != 0xFFFF && dom != domain)
continue;
/* get cca info on this apqn */
if (cca_get_info(card, dom, &ci, xflags))
continue;
/* current master key needs to be valid */
if (mktype == AES_MK_SET && ci.cur_aes_mk_state != '2')
continue;
if (mktype == APKA_MK_SET && ci.cur_apka_mk_state != '2')
continue;
/* check min hardware type */
if (minhwtype > 0 && minhwtype > ci.hwtype)
continue;
if (ptr_cur_mkvp || ptr_old_mkvp) {
/* check mkvps */
curmatch = oldmatch = 0;
if (mktype == AES_MK_SET) {
if (ptr_cur_mkvp &&
!memcmp(ptr_cur_mkvp, ci.cur_aes_mkvp,
sizeof(ci.cur_aes_mkvp)))
curmatch = 1;
if (ptr_old_mkvp &&
ci.old_aes_mk_state == '2' &&
!memcmp(ptr_old_mkvp, ci.old_aes_mkvp,
sizeof(ci.old_aes_mkvp)))
oldmatch = 1;
} else {
if (ptr_cur_mkvp &&
!memcmp(ptr_cur_mkvp, ci.cur_apka_mkvp,
sizeof(ci.cur_apka_mkvp)))
curmatch = 1;
if (ptr_old_mkvp &&
ci.old_apka_mk_state == '2' &&
!memcmp(ptr_old_mkvp, ci.old_apka_mkvp,
sizeof(ci.old_apka_mkvp)))
oldmatch = 1;
}
if (curmatch + oldmatch < 1)
continue;
}
/* apqn passed all filtering criterons, add to the array */
if (_nr_apqns < *nr_apqns)
apqns[_nr_apqns++] = (((u16)card) << 16) | ((u16)dom);
}
*nr_apqns = _nr_apqns;
/* release the device status memory */
mutex_unlock(&dev_status_mem_mutex);
return _nr_apqns ? 0 : -ENODEV;
}
EXPORT_SYMBOL(cca_findcard2);
int __init zcrypt_ccamisc_init(void)
{
/* Pre-allocate a small memory pool for cca cprbs. */
cprb_mempool = mempool_create_kmalloc_pool(zcrypt_mempool_threshold,
CPRB_MEMPOOL_ITEM_SIZE);
if (!cprb_mempool)
return -ENOMEM;
/* Pre-allocate one crypto status card struct used in findcard() */
dev_status_mem = kvmalloc(ZCRYPT_DEV_STATUS_EXT_SIZE, GFP_KERNEL);
if (!dev_status_mem) {
mempool_destroy(cprb_mempool);
return -ENOMEM;
}
return 0;
}
void zcrypt_ccamisc_exit(void)
{
mutex_lock(&dev_status_mem_mutex);
kvfree(dev_status_mem);
mutex_unlock(&dev_status_mem_mutex);
mempool_destroy(cprb_mempool);
}