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linux/drivers/s390/crypto/zcrypt_ccamisc.c
Harald Freudenberger 8617bb7400 s390/zcrypt: fix wrong offset index for APKA master key valid state 
Tests showed a mismatch between what the CCA tool reports about
the APKA master key state and what's displayed by the zcrypt dd
in sysfs. After some investigation, we found out that the
documentation which was the source for the zcrypt dd implementation
lacks the listing of 3 fields. So this patch now moves the
evaluation of the APKA master key state to the correct offset.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
2021-08-18 10:01:28 +02:00

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// 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 KMSG_COMPONENT "zcrypt"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/init.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/random.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"
#define DEBUG_DBG(...) ZCRYPT_DBF(DBF_DEBUG, ##__VA_ARGS__)
#define DEBUG_INFO(...) ZCRYPT_DBF(DBF_INFO, ##__VA_ARGS__)
#define DEBUG_WARN(...) ZCRYPT_DBF(DBF_WARN, ##__VA_ARGS__)
#define DEBUG_ERR(...) ZCRYPT_DBF(DBF_ERR, ##__VA_ARGS__)
/* 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
struct cca_info_list_entry {
struct list_head list;
u16 cardnr;
u16 domain;
struct cca_info info;
};
/* a list with cca_info_list_entry entries */
static LIST_HEAD(cca_info_list);
static DEFINE_SPINLOCK(cca_info_list_lock);
/*
* 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, int keybitsize)
{
struct secaeskeytoken *t = (struct secaeskeytoken *) token;
#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
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, int keybitsize,
int checkcpacfexport)
{
struct cipherkeytoken *t = (struct cipherkeytoken *) token;
bool keybitsizeok = true;
#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
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->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, size_t keysize,
int checkcpacfexport)
{
struct eccprivkeytoken *t = (struct eccprivkeytoken *) token;
#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__)
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 %zu\n",
__func__, (int) t->len, keysize);
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.
*/
static int alloc_and_prep_cprbmem(size_t paramblen,
u8 **pcprbmem,
struct CPRBX **preqCPRB,
struct CPRBX **prepCPRB)
{
u8 *cprbmem;
size_t cprbplusparamblen = sizeof(struct CPRBX) + paramblen;
struct CPRBX *preqcblk, *prepcblk;
/*
* allocate consecutive memory for request CPRB, request param
* block, reply CPRB and reply param block
*/
cprbmem = kcalloc(2, cprbplusparamblen, GFP_KERNEL);
if (!cprbmem)
return -ENOMEM;
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) + sizeof(struct CPRBX);
preqcblk->rpl_parmb =
((u8 __user *) prepcblk) + sizeof(struct CPRBX);
}
*pcprbmem = cprbmem;
*preqCPRB = preqcblk;
*prepCPRB = 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, int scrub)
{
if (scrub)
memzero_explicit(mem, 2 * (sizeof(struct CPRBX) + paramblen));
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));
pxcrb->agent_ID = 0x4341; /* 'CA' */
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)
{
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);
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:
DEBUG_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);
if (rc) {
DEBUG_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) {
DEBUG_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) {
DEBUG_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, 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, 0);
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)
{
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[0];
} lv1;
struct lv2 {
u16 len;
struct keyid {
u16 len;
u16 attr;
u8 data[SECKEYBLOBSIZE];
} keyid;
} lv2;
} __packed * preqparm;
struct lv2 *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);
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:
DEBUG_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->lv2) + keysize);
plv2->len = sizeof(struct lv2);
plv2->keyid.len = sizeof(struct keyid);
plv2->keyid.attr = 0x30;
preqcblk->req_parml = sizeof(struct cmreqparm) + keysize;
/* 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);
if (rc) {
DEBUG_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) {
DEBUG_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) {
DEBUG_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, 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, 1);
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)
{
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);
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);
if (rc) {
DEBUG_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) {
DEBUG_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 = -EAGAIN;
else
rc = -EIO;
goto out;
}
if (prepcblk->ccp_rscode != 0) {
DEBUG_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) {
DEBUG_ERR("%s reply param keyblock version mismatch 0x%02x\n",
__func__, (int) prepparm->lv3.ckb.version);
rc = -EIO;
goto out;
}
/* copy the tanslated 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:
DEBUG_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, 0);
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, size_t *keybufsize)
{
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[0];
u8 key_name_2[0];
u8 user_data_1[0];
u8 user_data_2[0];
} vud;
struct {
u16 len;
struct {
u16 len;
u16 flag;
u8 kek_id_1[0];
} tlv1;
struct {
u16 len;
u16 flag;
u8 kek_id_2[0];
} 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[0];
} tlv4;
struct {
u16 len;
u16 flag;
u8 gen_key_id_2[0];
} tlv5;
struct {
u16 len;
u16 flag;
u8 gen_key_id_2_label[0];
} 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[0]; /* 120-136 bytes */
} tlv1;
} kb;
} __packed * prepparm;
struct cipherkeytoken *t;
/* get already prepared memory for 2 cprbs with param block each */
rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk);
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:
DEBUG_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);
if (rc) {
DEBUG_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) {
DEBUG_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)) {
DEBUG_ERR("%s reply with invalid or unknown key block\n",
__func__);
rc = -EIO;
goto out;
}
/* and some checks on the generated key */
rc = cca_check_secaescipherkey(zcrypt_dbf_info, DBF_ERR,
prepparm->kb.tlv1.gen_key,
keybitsize, 1);
if (rc) {
rc = -EIO;
goto out;
}
/* copy the generated vlsc key token */
t = (struct cipherkeytoken *) prepparm->kb.tlv1.gen_key;
if (keybuf) {
if (*keybufsize >= t->len)
memcpy(keybuf, t, t->len);
else
rc = -EINVAL;
}
*keybufsize = t->len;
out:
free_cprbmem(mem, PARMBSIZE, 0);
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)
{
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[0];
} __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[0]; /* clear key value bytes */
} tlv2;
} __packed * preq_vud_block;
struct key_block {
u16 len;
struct {
u16 len;
u16 flag; /* 0x0030 */
u8 key_token[0]; /* 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[0]; /* 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);
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);
if (rc) {
DEBUG_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) {
DEBUG_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)) {
DEBUG_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 */
t = (struct cipherkeytoken *) prepparm->kb.tlv1.key_token;
memcpy(key_token, t, t->len);
*key_token_size = t->len;
out:
free_cprbmem(mem, PARMBSIZE, 0);
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, size_t *keybufsize)
{
int rc;
u8 *token;
int tokensize;
u8 exorbuf[32];
struct cipherkeytoken *t;
/* fill exorbuf with random data */
get_random_bytes(exorbuf, sizeof(exorbuf));
/* allocate space for the key token to build */
token = kmalloc(MAXCCAVLSCTOKENSIZE, GFP_KERNEL);
if (!token)
return -ENOMEM;
/* prepare the token with the key skeleton */
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);
if (rc) {
DEBUG_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);
if (rc) {
DEBUG_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);
if (rc) {
DEBUG_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);
if (rc) {
DEBUG_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:
kfree(token);
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)
{
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[0]; // 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;
/* get already prepared memory for 2 cprbs with param block each */
rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk);
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);
if (rc) {
DEBUG_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) {
DEBUG_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 = -EAGAIN;
else
rc = -EIO;
goto out;
}
if (prepcblk->ccp_rscode != 0) {
DEBUG_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) {
DEBUG_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) {
DEBUG_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:
DEBUG_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, 0);
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)
{
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[0];
} 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[0]; /* 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 keylen = ((struct eccprivkeytoken *)key)->len;
/* get already prepared memory for 2 cprbs with param block each */
rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk);
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);
if (rc) {
DEBUG_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) {
DEBUG_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 = -EAGAIN;
else
rc = -EIO;
goto out;
}
if (prepcblk->ccp_rscode != 0) {
DEBUG_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) {
DEBUG_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) {
DEBUG_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) {
DEBUG_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, 0);
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)
{
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[0];
} __packed * prepparm;
/* get already prepared memory for 2 cprbs with param block each */
rc = alloc_and_prep_cprbmem(parmbsize, &mem, &preqcblk, &prepcblk);
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);
if (rc) {
DEBUG_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) {
DEBUG_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, 0);
return rc;
}
EXPORT_SYMBOL(cca_query_crypto_facility);
static int cca_info_cache_fetch(u16 cardnr, u16 domain, struct cca_info *ci)
{
int rc = -ENOENT;
struct cca_info_list_entry *ptr;
spin_lock_bh(&cca_info_list_lock);
list_for_each_entry(ptr, &cca_info_list, list) {
if (ptr->cardnr == cardnr && ptr->domain == domain) {
memcpy(ci, &ptr->info, sizeof(*ci));
rc = 0;
break;
}
}
spin_unlock_bh(&cca_info_list_lock);
return rc;
}
static void cca_info_cache_update(u16 cardnr, u16 domain,
const struct cca_info *ci)
{
int found = 0;
struct cca_info_list_entry *ptr;
spin_lock_bh(&cca_info_list_lock);
list_for_each_entry(ptr, &cca_info_list, list) {
if (ptr->cardnr == cardnr &&
ptr->domain == domain) {
memcpy(&ptr->info, ci, sizeof(*ci));
found = 1;
break;
}
}
if (!found) {
ptr = kmalloc(sizeof(*ptr), GFP_ATOMIC);
if (!ptr) {
spin_unlock_bh(&cca_info_list_lock);
return;
}
ptr->cardnr = cardnr;
ptr->domain = domain;
memcpy(&ptr->info, ci, sizeof(*ci));
list_add(&ptr->list, &cca_info_list);
}
spin_unlock_bh(&cca_info_list_lock);
}
static void cca_info_cache_scrub(u16 cardnr, u16 domain)
{
struct cca_info_list_entry *ptr;
spin_lock_bh(&cca_info_list_lock);
list_for_each_entry(ptr, &cca_info_list, list) {
if (ptr->cardnr == cardnr &&
ptr->domain == domain) {
list_del(&ptr->list);
kfree(ptr);
break;
}
}
spin_unlock_bh(&cca_info_list_lock);
}
static void __exit mkvp_cache_free(void)
{
struct cca_info_list_entry *ptr, *pnext;
spin_lock_bh(&cca_info_list_lock);
list_for_each_entry_safe(ptr, pnext, &cca_info_list, list) {
list_del(&ptr->list);
kfree(ptr);
}
spin_unlock_bh(&cca_info_list_lock);
}
/*
* Fetch cca_info values via query_crypto_facility from adapter.
*/
static int fetch_cca_info(u16 cardnr, u16 domain, struct cca_info *ci)
{
int rc, found = 0;
size_t rlen, vlen;
u8 *rarray, *varray, *pg;
struct zcrypt_device_status_ext devstat;
memset(ci, 0, sizeof(*ci));
/* get first info from zcrypt device driver about this apqn */
rc = zcrypt_device_status_ext(cardnr, domain, &devstat);
if (rc)
return rc;
ci->hwtype = devstat.hwtype;
/* prep page for rule array and var array use */
pg = (u8 *) __get_free_page(GFP_KERNEL);
if (!pg)
return -ENOMEM;
rarray = pg;
varray = pg + 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);
if (rc == 0 && rlen >= 10*8 && vlen >= 204) {
memcpy(ci->serial, rarray, 8);
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);
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:
free_page((unsigned long) pg);
return found == 2 ? 0 : -ENOENT;
}
/*
* Fetch cca information about a CCA queue.
*/
int cca_get_info(u16 card, u16 dom, struct cca_info *ci, int verify)
{
int rc;
rc = cca_info_cache_fetch(card, dom, ci);
if (rc || verify) {
rc = fetch_cca_info(card, dom, ci);
if (rc == 0)
cca_info_cache_update(card, dom, ci);
}
return rc;
}
EXPORT_SYMBOL(cca_get_info);
/*
* Search for a matching crypto card based on the
* Master Key Verification Pattern given.
*/
static int findcard(u64 mkvp, u16 *pcardnr, u16 *pdomain,
int verify, int minhwtype)
{
struct zcrypt_device_status_ext *device_status;
u16 card, dom;
struct cca_info ci;
int i, rc, oi = -1;
/* mkvp must not be zero, minhwtype needs to be >= 0 */
if (mkvp == 0 || minhwtype < 0)
return -EINVAL;
/* 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);
/* walk through all crypto cards */
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);
if (device_status[i].online &&
device_status[i].functions & 0x04) {
/* enabled CCA card, check current mkvp from cache */
if (cca_info_cache_fetch(card, dom, &ci) == 0 &&
ci.hwtype >= minhwtype &&
ci.cur_aes_mk_state == '2' &&
ci.cur_aes_mkvp == mkvp) {
if (!verify)
break;
/* verify: refresh card info */
if (fetch_cca_info(card, dom, &ci) == 0) {
cca_info_cache_update(card, dom, &ci);
if (ci.hwtype >= minhwtype &&
ci.cur_aes_mk_state == '2' &&
ci.cur_aes_mkvp == mkvp)
break;
}
}
} else {
/* Card is offline and/or not a CCA card. */
/* del mkvp entry from cache if it exists */
cca_info_cache_scrub(card, dom);
}
}
if (i >= MAX_ZDEV_ENTRIES_EXT) {
/* nothing found, so this time without cache */
for (i = 0; i < MAX_ZDEV_ENTRIES_EXT; i++) {
if (!(device_status[i].online &&
device_status[i].functions & 0x04))
continue;
card = AP_QID_CARD(device_status[i].qid);
dom = AP_QID_QUEUE(device_status[i].qid);
/* fresh fetch mkvp from adapter */
if (fetch_cca_info(card, dom, &ci) == 0) {
cca_info_cache_update(card, dom, &ci);
if (ci.hwtype >= minhwtype &&
ci.cur_aes_mk_state == '2' &&
ci.cur_aes_mkvp == mkvp)
break;
if (ci.hwtype >= minhwtype &&
ci.old_aes_mk_state == '2' &&
ci.old_aes_mkvp == mkvp &&
oi < 0)
oi = i;
}
}
if (i >= MAX_ZDEV_ENTRIES_EXT && oi >= 0) {
/* old mkvp matched, use this card then */
card = AP_QID_CARD(device_status[oi].qid);
dom = AP_QID_QUEUE(device_status[oi].qid);
}
}
if (i < MAX_ZDEV_ENTRIES_EXT || oi >= 0) {
if (pcardnr)
*pcardnr = card;
if (pdomain)
*pdomain = dom;
rc = (i < MAX_ZDEV_ENTRIES_EXT ? 0 : 1);
} else
rc = -ENODEV;
kvfree(device_status);
return rc;
}
/*
* Search for a matching crypto card based on the Master Key
* Verification Pattern provided inside a secure key token.
*/
int cca_findcard(const u8 *key, u16 *pcardnr, u16 *pdomain, int verify)
{
u64 mkvp;
int minhwtype = 0;
const struct keytoken_header *hdr = (struct keytoken_header *) key;
if (hdr->type != TOKTYPE_CCA_INTERNAL)
return -EINVAL;
switch (hdr->version) {
case TOKVER_CCA_AES:
mkvp = ((struct secaeskeytoken *)key)->mkvp;
break;
case TOKVER_CCA_VLSC:
mkvp = ((struct cipherkeytoken *)key)->mkvp0;
minhwtype = AP_DEVICE_TYPE_CEX6;
break;
default:
return -EINVAL;
}
return findcard(mkvp, pcardnr, pdomain, verify, minhwtype);
}
EXPORT_SYMBOL(cca_findcard);
int cca_findcard2(u32 **apqns, u32 *nr_apqns, u16 cardnr, u16 domain,
int minhwtype, int mktype, u64 cur_mkvp, u64 old_mkvp,
int verify)
{
struct zcrypt_device_status_ext *device_status;
u32 *_apqns = NULL, _nr_apqns = 0;
int i, card, dom, curmatch, oldmatch, rc = 0;
struct cca_info ci;
/* 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 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, verify))
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 (cur_mkvp || old_mkvp) {
/* check mkvps */
curmatch = oldmatch = 0;
if (mktype == AES_MK_SET) {
if (cur_mkvp && cur_mkvp == ci.cur_aes_mkvp)
curmatch = 1;
if (old_mkvp && ci.old_aes_mk_state == '2' &&
old_mkvp == ci.old_aes_mkvp)
oldmatch = 1;
} else {
if (cur_mkvp && cur_mkvp == ci.cur_apka_mkvp)
curmatch = 1;
if (old_mkvp && ci.old_apka_mk_state == '2' &&
old_mkvp == ci.old_apka_mkvp)
oldmatch = 1;
}
if (curmatch + oldmatch < 1)
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(cca_findcard2);
void __exit zcrypt_ccamisc_exit(void)
{
mkvp_cache_free();
}
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