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|
// SPDX-License-Identifier: GPL-2.0
/*
* pkey cca specific code
*
* Copyright IBM Corp. 2024
*/
#define KMSG_COMPONENT "pkey"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include "zcrypt_api.h"
#include "zcrypt_ccamisc.h"
#include "pkey_base.h"
/*
* Check key blob for known and supported CCA key.
*/
bool pkey_is_cca_key(const u8 *key, u32 keylen)
{
struct keytoken_header *hdr = (struct keytoken_header *)key;
if (keylen < sizeof(*hdr))
return false;
switch (hdr->type) {
case TOKTYPE_CCA_INTERNAL:
switch (hdr->version) {
case TOKVER_CCA_AES:
case TOKVER_CCA_VLSC:
return true;
default:
return false;
}
case TOKTYPE_CCA_INTERNAL_PKA:
return true;
default:
return false;
}
}
bool pkey_is_cca_keytype(enum pkey_key_type key_type)
{
switch (key_type) {
case PKEY_TYPE_CCA_DATA:
case PKEY_TYPE_CCA_CIPHER:
case PKEY_TYPE_CCA_ECC:
return true;
default:
return false;
}
}
int pkey_cca_key2protkey(u16 card, u16 dom,
const u8 *key, u32 keylen,
u8 *protkey, u32 *protkeylen, u32 *protkeytype)
{
struct keytoken_header *hdr = (struct keytoken_header *)key;
int rc;
if (keylen < sizeof(*hdr))
return -EINVAL;
zcrypt_wait_api_operational();
if (hdr->type == TOKTYPE_CCA_INTERNAL &&
hdr->version == TOKVER_CCA_AES) {
/* CCA AES data key */
if (keylen != sizeof(struct secaeskeytoken))
return -EINVAL;
if (cca_check_secaeskeytoken(pkey_dbf_info, 3, key, 0))
return -EINVAL;
rc = cca_sec2protkey(card, dom, key, protkey,
protkeylen, protkeytype);
} else if (hdr->type == TOKTYPE_CCA_INTERNAL &&
hdr->version == TOKVER_CCA_VLSC) {
/* CCA AES cipher key */
if (keylen < hdr->len || keylen > MAXCCAVLSCTOKENSIZE)
return -EINVAL;
if (cca_check_secaescipherkey(pkey_dbf_info,
3, key, 0, 1))
return -EINVAL;
rc = cca_cipher2protkey(card, dom, key, protkey,
protkeylen, protkeytype);
} else if (hdr->type == TOKTYPE_CCA_INTERNAL_PKA) {
/* CCA ECC (private) key */
if (keylen < sizeof(struct eccprivkeytoken))
return -EINVAL;
if (cca_check_sececckeytoken(pkey_dbf_info, 3, key, keylen, 1))
return -EINVAL;
rc = cca_ecc2protkey(card, dom, key, protkey,
protkeylen, protkeytype);
} else {
PKEY_DBF_ERR("%s unknown/unsupported blob type %d version %d\n",
__func__, hdr->type, hdr->version);
rc = -EINVAL;
}
pr_debug("card=%d dom=%d rc=%d\n", card, dom, rc);
return rc;
}
/*
* Generate CCA secure key.
* As of now only CCA AES Data or Cipher secure keys are
* supported.
* keytype is one of the PKEY_KEYTYPE_* constants,
* subtype may be 0 or PKEY_TYPE_CCA_DATA or PKEY_TYPE_CCA_CIPHER,
* keybitsize is the bit size of the key (may be 0 for
* keytype PKEY_KEYTYPE_AES_*).
*/
int pkey_cca_gen_key(u16 card, u16 dom,
u32 keytype, u32 subtype,
u32 keybitsize, u32 flags,
u8 *keybuf, u32 *keybuflen)
{
int len, rc;
/* check keytype, subtype, keybitsize */
switch (keytype) {
case PKEY_KEYTYPE_AES_128:
case PKEY_KEYTYPE_AES_192:
case PKEY_KEYTYPE_AES_256:
len = pkey_keytype_aes_to_size(keytype);
if (keybitsize && keybitsize != 8 * len) {
PKEY_DBF_ERR("%s unknown/unsupported keybitsize %d\n",
__func__, keybitsize);
return -EINVAL;
}
keybitsize = 8 * len;
switch (subtype) {
case 0:
case PKEY_TYPE_CCA_DATA:
case PKEY_TYPE_CCA_CIPHER:
break;
default:
PKEY_DBF_ERR("%s unknown/unsupported subtype %d\n",
__func__, subtype);
return -EINVAL;
}
break;
default:
PKEY_DBF_ERR("%s unknown/unsupported keytype %d\n",
__func__, keytype);
return -EINVAL;
}
zcrypt_wait_api_operational();
if (subtype == PKEY_TYPE_CCA_CIPHER) {
rc = cca_gencipherkey(card, dom, keybitsize, flags,
keybuf, keybuflen);
} else {
/* 0 or PKEY_TYPE_CCA_DATA */
rc = cca_genseckey(card, dom, keybitsize, keybuf);
*keybuflen = (rc ? 0 : SECKEYBLOBSIZE);
}
pr_debug("card=%d dom=%d rc=%d\n", card, dom, rc);
return rc;
}
/*
* Generate CCA secure key with given clear key value.
* As of now only CCA AES Data or Cipher secure keys are
* supported.
* keytype is one of the PKEY_KEYTYPE_* constants,
* subtype may be 0 or PKEY_TYPE_CCA_DATA or PKEY_TYPE_CCA_CIPHER,
* keybitsize is the bit size of the key (may be 0 for
* keytype PKEY_KEYTYPE_AES_*).
*/
int pkey_cca_clr2key(u16 card, u16 dom,
u32 keytype, u32 subtype,
u32 keybitsize, u32 flags,
const u8 *clrkey, u32 clrkeylen,
u8 *keybuf, u32 *keybuflen)
{
int len, rc;
/* check keytype, subtype, clrkeylen, keybitsize */
switch (keytype) {
case PKEY_KEYTYPE_AES_128:
case PKEY_KEYTYPE_AES_192:
case PKEY_KEYTYPE_AES_256:
len = pkey_keytype_aes_to_size(keytype);
if (keybitsize && keybitsize != 8 * len) {
PKEY_DBF_ERR("%s unknown/unsupported keybitsize %d\n",
__func__, keybitsize);
return -EINVAL;
}
keybitsize = 8 * len;
if (clrkeylen != len) {
PKEY_DBF_ERR("%s invalid clear key len %d != %d\n",
__func__, clrkeylen, len);
return -EINVAL;
}
switch (subtype) {
case 0:
case PKEY_TYPE_CCA_DATA:
case PKEY_TYPE_CCA_CIPHER:
break;
default:
PKEY_DBF_ERR("%s unknown/unsupported subtype %d\n",
__func__, subtype);
return -EINVAL;
}
break;
default:
PKEY_DBF_ERR("%s unknown/unsupported keytype %d\n",
__func__, keytype);
return -EINVAL;
}
zcrypt_wait_api_operational();
if (subtype == PKEY_TYPE_CCA_CIPHER) {
rc = cca_clr2cipherkey(card, dom, keybitsize,
flags, clrkey, keybuf, keybuflen);
} else {
/* 0 or PKEY_TYPE_CCA_DATA */
rc = cca_clr2seckey(card, dom, keybitsize,
clrkey, keybuf);
*keybuflen = (rc ? 0 : SECKEYBLOBSIZE);
}
pr_debug("card=%d dom=%d rc=%d\n", card, dom, rc);
return rc;
}
int pkey_cca_verifykey(const u8 *key, u32 keylen,
u16 *card, u16 *dom,
u32 *keytype, u32 *keybitsize, u32 *flags)
{
struct keytoken_header *hdr = (struct keytoken_header *)key;
u32 nr_apqns, *apqns = NULL;
int rc;
if (keylen < sizeof(*hdr))
return -EINVAL;
zcrypt_wait_api_operational();
if (hdr->type == TOKTYPE_CCA_INTERNAL &&
hdr->version == TOKVER_CCA_AES) {
struct secaeskeytoken *t = (struct secaeskeytoken *)key;
rc = cca_check_secaeskeytoken(pkey_dbf_info, 3, key, 0);
if (rc)
goto out;
*keytype = PKEY_TYPE_CCA_DATA;
*keybitsize = t->bitsize;
rc = cca_findcard2(&apqns, &nr_apqns, *card, *dom,
ZCRYPT_CEX3C, AES_MK_SET,
t->mkvp, 0, 1);
if (!rc)
*flags = PKEY_FLAGS_MATCH_CUR_MKVP;
if (rc == -ENODEV) {
rc = cca_findcard2(&apqns, &nr_apqns, *card, *dom,
ZCRYPT_CEX3C, AES_MK_SET,
0, t->mkvp, 1);
if (!rc)
*flags = PKEY_FLAGS_MATCH_ALT_MKVP;
}
if (rc)
goto out;
*card = ((struct pkey_apqn *)apqns)->card;
*dom = ((struct pkey_apqn *)apqns)->domain;
} else if (hdr->type == TOKTYPE_CCA_INTERNAL &&
hdr->version == TOKVER_CCA_VLSC) {
struct cipherkeytoken *t = (struct cipherkeytoken *)key;
rc = cca_check_secaescipherkey(pkey_dbf_info, 3, key, 0, 1);
if (rc)
goto out;
*keytype = PKEY_TYPE_CCA_CIPHER;
*keybitsize = PKEY_SIZE_UNKNOWN;
if (!t->plfver && t->wpllen == 512)
*keybitsize = PKEY_SIZE_AES_128;
else if (!t->plfver && t->wpllen == 576)
*keybitsize = PKEY_SIZE_AES_192;
else if (!t->plfver && t->wpllen == 640)
*keybitsize = PKEY_SIZE_AES_256;
rc = cca_findcard2(&apqns, &nr_apqns, *card, *dom,
ZCRYPT_CEX6, AES_MK_SET,
t->mkvp0, 0, 1);
if (!rc)
*flags = PKEY_FLAGS_MATCH_CUR_MKVP;
if (rc == -ENODEV) {
rc = cca_findcard2(&apqns, &nr_apqns, *card, *dom,
ZCRYPT_CEX6, AES_MK_SET,
0, t->mkvp0, 1);
if (!rc)
*flags = PKEY_FLAGS_MATCH_ALT_MKVP;
}
if (rc)
goto out;
*card = ((struct pkey_apqn *)apqns)->card;
*dom = ((struct pkey_apqn *)apqns)->domain;
} else {
/* unknown/unsupported key blob */
rc = -EINVAL;
}
out:
kfree(apqns);
pr_debug("rc=%d\n", rc);
return rc;
}
int pkey_cca_apqns4key(const u8 *key, u32 keylen, u32 flags,
struct pkey_apqn *apqns, size_t *nr_apqns)
{
struct keytoken_header *hdr = (struct keytoken_header *)key;
u32 _nr_apqns, *_apqns = NULL;
int rc;
if (!flags)
flags = PKEY_FLAGS_MATCH_CUR_MKVP | PKEY_FLAGS_MATCH_ALT_MKVP;
if (keylen < sizeof(struct keytoken_header))
return -EINVAL;
zcrypt_wait_api_operational();
if (hdr->type == TOKTYPE_CCA_INTERNAL) {
u64 cur_mkvp = 0, old_mkvp = 0;
int minhwtype = ZCRYPT_CEX3C;
if (hdr->version == TOKVER_CCA_AES) {
struct secaeskeytoken *t = (struct secaeskeytoken *)key;
if (flags & PKEY_FLAGS_MATCH_CUR_MKVP)
cur_mkvp = t->mkvp;
if (flags & PKEY_FLAGS_MATCH_ALT_MKVP)
old_mkvp = t->mkvp;
} else if (hdr->version == TOKVER_CCA_VLSC) {
struct cipherkeytoken *t = (struct cipherkeytoken *)key;
minhwtype = ZCRYPT_CEX6;
if (flags & PKEY_FLAGS_MATCH_CUR_MKVP)
cur_mkvp = t->mkvp0;
if (flags & PKEY_FLAGS_MATCH_ALT_MKVP)
old_mkvp = t->mkvp0;
} else {
/* unknown CCA internal token type */
return -EINVAL;
}
rc = cca_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF,
minhwtype, AES_MK_SET,
cur_mkvp, old_mkvp, 1);
if (rc)
goto out;
} else if (hdr->type == TOKTYPE_CCA_INTERNAL_PKA) {
struct eccprivkeytoken *t = (struct eccprivkeytoken *)key;
u64 cur_mkvp = 0, old_mkvp = 0;
if (t->secid == 0x20) {
if (flags & PKEY_FLAGS_MATCH_CUR_MKVP)
cur_mkvp = t->mkvp;
if (flags & PKEY_FLAGS_MATCH_ALT_MKVP)
old_mkvp = t->mkvp;
} else {
/* unknown CCA internal 2 token type */
return -EINVAL;
}
rc = cca_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF,
ZCRYPT_CEX7, APKA_MK_SET,
cur_mkvp, old_mkvp, 1);
if (rc)
goto out;
} else {
PKEY_DBF_ERR("%s unknown/unsupported blob type %d version %d\n",
__func__, hdr->type, hdr->version);
return -EINVAL;
}
if (apqns) {
if (*nr_apqns < _nr_apqns)
rc = -ENOSPC;
else
memcpy(apqns, _apqns, _nr_apqns * sizeof(u32));
}
*nr_apqns = _nr_apqns;
out:
kfree(_apqns);
pr_debug("rc=%d\n", rc);
return rc;
}
int pkey_cca_apqns4type(enum pkey_key_type ktype,
u8 cur_mkvp[32], u8 alt_mkvp[32], u32 flags,
struct pkey_apqn *apqns, size_t *nr_apqns)
{
u32 _nr_apqns, *_apqns = NULL;
int rc;
zcrypt_wait_api_operational();
if (ktype == PKEY_TYPE_CCA_DATA || ktype == PKEY_TYPE_CCA_CIPHER) {
u64 cur_mkvp = 0, old_mkvp = 0;
int minhwtype = ZCRYPT_CEX3C;
if (flags & PKEY_FLAGS_MATCH_CUR_MKVP)
cur_mkvp = *((u64 *)cur_mkvp);
if (flags & PKEY_FLAGS_MATCH_ALT_MKVP)
old_mkvp = *((u64 *)alt_mkvp);
if (ktype == PKEY_TYPE_CCA_CIPHER)
minhwtype = ZCRYPT_CEX6;
rc = cca_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF,
minhwtype, AES_MK_SET,
cur_mkvp, old_mkvp, 1);
if (rc)
goto out;
} else if (ktype == PKEY_TYPE_CCA_ECC) {
u64 cur_mkvp = 0, old_mkvp = 0;
if (flags & PKEY_FLAGS_MATCH_CUR_MKVP)
cur_mkvp = *((u64 *)cur_mkvp);
if (flags & PKEY_FLAGS_MATCH_ALT_MKVP)
old_mkvp = *((u64 *)alt_mkvp);
rc = cca_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF,
ZCRYPT_CEX7, APKA_MK_SET,
cur_mkvp, old_mkvp, 1);
if (rc)
goto out;
} else {
PKEY_DBF_ERR("%s unknown/unsupported key type %d",
__func__, (int)ktype);
return -EINVAL;
}
if (apqns) {
if (*nr_apqns < _nr_apqns)
rc = -ENOSPC;
else
memcpy(apqns, _apqns, _nr_apqns * sizeof(u32));
}
*nr_apqns = _nr_apqns;
out:
kfree(_apqns);
pr_debug("rc=%d\n", rc);
return rc;
}
|
