diff options
Diffstat (limited to 'drivers/s390/crypto/pkey_api.c')
| -rw-r--r-- | drivers/s390/crypto/pkey_api.c | 292 |
1 files changed, 257 insertions, 35 deletions
diff --git a/drivers/s390/crypto/pkey_api.c b/drivers/s390/crypto/pkey_api.c index 5896e5282a4e..dd84995049b9 100644 --- a/drivers/s390/crypto/pkey_api.c +++ b/drivers/s390/crypto/pkey_api.c @@ -31,11 +31,9 @@ MODULE_LICENSE("GPL"); MODULE_AUTHOR("IBM Corporation"); MODULE_DESCRIPTION("s390 protected key interface"); -#define KEYBLOBBUFSIZE 8192 /* key buffer size used for internal processing */ -#define MAXAPQNSINLIST 64 /* max 64 apqns within a apqn list */ - -/* mask of available pckmo subfunctions, fetched once at module init */ -static cpacf_mask_t pckmo_functions; +#define KEYBLOBBUFSIZE 8192 /* key buffer size used for internal processing */ +#define PROTKEYBLOBBUFSIZE 256 /* protected key buffer size used internal */ +#define MAXAPQNSINLIST 64 /* max 64 apqns within a apqn list */ /* * debug feature data and functions @@ -90,6 +88,9 @@ static int pkey_clr2protkey(u32 keytype, const struct pkey_clrkey *clrkey, struct pkey_protkey *protkey) { + /* mask of available pckmo subfunctions */ + static cpacf_mask_t pckmo_functions; + long fc; int keysize; u8 paramblock[64]; @@ -113,11 +114,13 @@ static int pkey_clr2protkey(u32 keytype, return -EINVAL; } - /* - * Check if the needed pckmo subfunction is available. - * These subfunctions can be enabled/disabled by customers - * in the LPAR profile or may even change on the fly. - */ + /* Did we already check for PCKMO ? */ + if (!pckmo_functions.bytes[0]) { + /* no, so check now */ + if (!cpacf_query(CPACF_PCKMO, &pckmo_functions)) + return -ENODEV; + } + /* check for the pckmo subfunction we need now */ if (!cpacf_test_func(&pckmo_functions, fc)) { DEBUG_ERR("%s pckmo functions not available\n", __func__); return -ENODEV; @@ -237,8 +240,9 @@ static int pkey_ep11key2pkey(const u8 *key, struct pkey_protkey *pkey) for (rc = -ENODEV, i = 0; i < nr_apqns; i++) { card = apqns[i] >> 16; dom = apqns[i] & 0xFFFF; - rc = ep11_key2protkey(card, dom, key, kb->head.len, - pkey->protkey, &pkey->len, &pkey->type); + pkey->len = sizeof(pkey->protkey); + rc = ep11_kblob2protkey(card, dom, key, kb->head.len, + pkey->protkey, &pkey->len, &pkey->type); if (rc == 0) break; } @@ -449,15 +453,21 @@ static int pkey_nonccatok2pkey(const u8 *key, u32 keylen, break; } case TOKVER_EP11_AES: { - if (keylen < MINEP11AESKEYBLOBSIZE) - goto out; /* check ep11 key for exportable as protected key */ - rc = ep11_check_aeskeyblob(debug_info, 3, key, 0, 1); + rc = ep11_check_aes_key(debug_info, 3, key, keylen, 1); if (rc) goto out; rc = pkey_ep11key2pkey(key, protkey); break; } + case TOKVER_EP11_AES_WITH_HEADER: + /* check ep11 key with header for exportable as protected key */ + rc = ep11_check_aes_key_with_hdr(debug_info, 3, key, keylen, 1); + if (rc) + goto out; + rc = pkey_ep11key2pkey(key + sizeof(struct ep11kblob_header), + protkey); + break; default: DEBUG_ERR("%s unknown/unsupported non-CCA token version %d\n", __func__, hdr->version); @@ -661,13 +671,14 @@ static int pkey_verifykey2(const u8 *key, size_t keylen, *ksize = (enum pkey_key_size) t->bitsize; rc = cca_findcard2(&_apqns, &_nr_apqns, *cardnr, *domain, - ZCRYPT_CEX3C, t->mkvp, 0, 1); + ZCRYPT_CEX3C, AES_MK_SET, t->mkvp, 0, 1); if (rc == 0 && flags) *flags = PKEY_FLAGS_MATCH_CUR_MKVP; if (rc == -ENODEV) { rc = cca_findcard2(&_apqns, &_nr_apqns, *cardnr, *domain, - ZCRYPT_CEX3C, 0, t->mkvp, 1); + ZCRYPT_CEX3C, AES_MK_SET, + 0, t->mkvp, 1); if (rc == 0 && flags) *flags = PKEY_FLAGS_MATCH_ALT_MKVP; } @@ -697,13 +708,14 @@ static int pkey_verifykey2(const u8 *key, size_t keylen, } rc = cca_findcard2(&_apqns, &_nr_apqns, *cardnr, *domain, - ZCRYPT_CEX6, t->mkvp0, 0, 1); + ZCRYPT_CEX6, AES_MK_SET, t->mkvp0, 0, 1); if (rc == 0 && flags) *flags = PKEY_FLAGS_MATCH_CUR_MKVP; if (rc == -ENODEV) { rc = cca_findcard2(&_apqns, &_nr_apqns, *cardnr, *domain, - ZCRYPT_CEX6, 0, t->mkvp0, 1); + ZCRYPT_CEX6, AES_MK_SET, + 0, t->mkvp0, 1); if (rc == 0 && flags) *flags = PKEY_FLAGS_MATCH_ALT_MKVP; } @@ -717,7 +729,7 @@ static int pkey_verifykey2(const u8 *key, size_t keylen, && hdr->version == TOKVER_EP11_AES) { struct ep11keyblob *kb = (struct ep11keyblob *)key; - rc = ep11_check_aeskeyblob(debug_info, 3, key, 0, 1); + rc = ep11_check_aes_key(debug_info, 3, key, keylen, 1); if (rc) goto out; if (ktype) @@ -778,7 +790,7 @@ static int pkey_keyblob2pkey2(const struct pkey_apqn *apqns, size_t nr_apqns, if (hdr->version == TOKVER_EP11_AES) { if (keylen < sizeof(struct ep11keyblob)) return -EINVAL; - if (ep11_check_aeskeyblob(debug_info, 3, key, 0, 1)) + if (ep11_check_aes_key(debug_info, 3, key, keylen, 1)) return -EINVAL; } else { return pkey_nonccatok2pkey(key, keylen, pkey); @@ -804,9 +816,10 @@ static int pkey_keyblob2pkey2(const struct pkey_apqn *apqns, size_t nr_apqns, else { /* EP11 AES secure key blob */ struct ep11keyblob *kb = (struct ep11keyblob *) key; - rc = ep11_key2protkey(card, dom, key, kb->head.len, - pkey->protkey, &pkey->len, - &pkey->type); + pkey->len = sizeof(pkey->protkey); + rc = ep11_kblob2protkey(card, dom, key, kb->head.len, + pkey->protkey, &pkey->len, + &pkey->type); } if (rc == 0) break; @@ -825,7 +838,27 @@ static int pkey_apqns4key(const u8 *key, size_t keylen, u32 flags, if (keylen < sizeof(struct keytoken_header) || flags == 0) return -EINVAL; - if (hdr->type == TOKTYPE_NON_CCA && hdr->version == TOKVER_EP11_AES) { + if (hdr->type == TOKTYPE_NON_CCA + && (hdr->version == TOKVER_EP11_AES_WITH_HEADER + || hdr->version == TOKVER_EP11_ECC_WITH_HEADER) + && is_ep11_keyblob(key + sizeof(struct ep11kblob_header))) { + int minhwtype = 0, api = 0; + struct ep11keyblob *kb = (struct ep11keyblob *) + (key + sizeof(struct ep11kblob_header)); + + if (flags != PKEY_FLAGS_MATCH_CUR_MKVP) + return -EINVAL; + if (kb->attr & EP11_BLOB_PKEY_EXTRACTABLE) { + minhwtype = ZCRYPT_CEX7; + api = EP11_API_V; + } + rc = ep11_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF, + minhwtype, api, kb->wkvp); + if (rc) + goto out; + } else if (hdr->type == TOKTYPE_NON_CCA + && hdr->version == TOKVER_EP11_AES + && is_ep11_keyblob(key)) { int minhwtype = 0, api = 0; struct ep11keyblob *kb = (struct ep11keyblob *) key; @@ -863,7 +896,26 @@ static int pkey_apqns4key(const u8 *key, size_t keylen, u32 flags, return -EINVAL; } rc = cca_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF, - minhwtype, cur_mkvp, old_mkvp, 1); + minhwtype, AES_MK_SET, + cur_mkvp, old_mkvp, 1); + if (rc) + goto out; + } else if (hdr->type == TOKTYPE_CCA_INTERNAL_PKA) { + u64 cur_mkvp = 0, old_mkvp = 0; + struct eccprivkeytoken *t = (struct eccprivkeytoken *)key; + + 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 @@ -900,10 +952,26 @@ static int pkey_apqns4keytype(enum pkey_key_type ktype, if (ktype == PKEY_TYPE_CCA_CIPHER) minhwtype = ZCRYPT_CEX6; rc = cca_findcard2(&_apqns, &_nr_apqns, 0xFFFF, 0xFFFF, - minhwtype, cur_mkvp, old_mkvp, 1); + 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 if (ktype == PKEY_TYPE_EP11) { + + } else if (ktype == PKEY_TYPE_EP11 || + ktype == PKEY_TYPE_EP11_AES || + ktype == PKEY_TYPE_EP11_ECC) { u8 *wkvp = NULL; if (flags & PKEY_FLAGS_MATCH_CUR_MKVP) @@ -929,6 +997,111 @@ out: return rc; } +static int pkey_keyblob2pkey3(const struct pkey_apqn *apqns, size_t nr_apqns, + const u8 *key, size_t keylen, u32 *protkeytype, + u8 *protkey, u32 *protkeylen) +{ + int i, card, dom, rc; + struct keytoken_header *hdr = (struct keytoken_header *)key; + + /* check for at least one apqn given */ + if (!apqns || !nr_apqns) + return -EINVAL; + + if (keylen < sizeof(struct keytoken_header)) + return -EINVAL; + + if (hdr->type == TOKTYPE_NON_CCA + && hdr->version == TOKVER_EP11_AES_WITH_HEADER + && is_ep11_keyblob(key + sizeof(struct ep11kblob_header))) { + /* EP11 AES key blob with header */ + if (ep11_check_aes_key_with_hdr(debug_info, 3, key, keylen, 1)) + return -EINVAL; + } else if (hdr->type == TOKTYPE_NON_CCA + && hdr->version == TOKVER_EP11_ECC_WITH_HEADER + && is_ep11_keyblob(key + sizeof(struct ep11kblob_header))) { + /* EP11 ECC key blob with header */ + if (ep11_check_ecc_key_with_hdr(debug_info, 3, key, keylen, 1)) + return -EINVAL; + } else if (hdr->type == TOKTYPE_NON_CCA + && hdr->version == TOKVER_EP11_AES + && is_ep11_keyblob(key)) { + /* EP11 AES key blob with header in session field */ + if (ep11_check_aes_key(debug_info, 3, key, keylen, 1)) + return -EINVAL; + } else if (hdr->type == TOKTYPE_CCA_INTERNAL) { + if (hdr->version == TOKVER_CCA_AES) { + /* CCA AES data key */ + if (keylen != sizeof(struct secaeskeytoken)) + return -EINVAL; + if (cca_check_secaeskeytoken(debug_info, 3, key, 0)) + return -EINVAL; + } else if (hdr->version == TOKVER_CCA_VLSC) { + /* CCA AES cipher key */ + if (keylen < hdr->len || keylen > MAXCCAVLSCTOKENSIZE) + return -EINVAL; + if (cca_check_secaescipherkey(debug_info, 3, key, 0, 1)) + return -EINVAL; + } else { + DEBUG_ERR("%s unknown CCA internal token version %d\n", + __func__, hdr->version); + return -EINVAL; + } + } else if (hdr->type == TOKTYPE_CCA_INTERNAL_PKA) { + /* CCA ECC (private) key */ + if (keylen < sizeof(struct eccprivkeytoken)) + return -EINVAL; + if (cca_check_sececckeytoken(debug_info, 3, key, keylen, 1)) + return -EINVAL; + } else if (hdr->type == TOKTYPE_NON_CCA) { + struct pkey_protkey pkey; + + rc = pkey_nonccatok2pkey(key, keylen, &pkey); + if (rc) + return rc; + memcpy(protkey, pkey.protkey, pkey.len); + *protkeylen = pkey.len; + *protkeytype = pkey.type; + return 0; + } else { + DEBUG_ERR("%s unknown/unsupported blob type %d\n", + __func__, hdr->type); + return -EINVAL; + } + + /* simple try all apqns from the list */ + for (rc = -ENODEV, i = 0; rc && i < nr_apqns; i++) { + card = apqns[i].card; + dom = apqns[i].domain; + if (hdr->type == TOKTYPE_NON_CCA + && (hdr->version == TOKVER_EP11_AES_WITH_HEADER + || hdr->version == TOKVER_EP11_ECC_WITH_HEADER) + && is_ep11_keyblob(key + sizeof(struct ep11kblob_header))) + rc = ep11_kblob2protkey(card, dom, key, hdr->len, + protkey, protkeylen, protkeytype); + else if (hdr->type == TOKTYPE_NON_CCA + && hdr->version == TOKVER_EP11_AES + && is_ep11_keyblob(key)) + rc = ep11_kblob2protkey(card, dom, key, hdr->len, + protkey, protkeylen, protkeytype); + else if (hdr->type == TOKTYPE_CCA_INTERNAL && + hdr->version == TOKVER_CCA_AES) + rc = cca_sec2protkey(card, dom, key, protkey, + protkeylen, protkeytype); + else if (hdr->type == TOKTYPE_CCA_INTERNAL && + hdr->version == TOKVER_CCA_VLSC) + rc = cca_cipher2protkey(card, dom, key, protkey, + protkeylen, protkeytype); + else if (hdr->type == TOKTYPE_CCA_INTERNAL_PKA) + rc = cca_ecc2protkey(card, dom, key, protkey, + protkeylen, protkeytype); + else + return -EINVAL; + } + + return rc; +} + /* * File io functions */ @@ -1329,6 +1502,55 @@ static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd, kfree(apqns); break; } + case PKEY_KBLOB2PROTK3: { + struct pkey_kblob2pkey3 __user *utp = (void __user *) arg; + struct pkey_kblob2pkey3 ktp; + struct pkey_apqn *apqns = NULL; + u32 protkeylen = PROTKEYBLOBBUFSIZE; + u8 *kkey, *protkey; + + if (copy_from_user(&ktp, utp, sizeof(ktp))) + return -EFAULT; + apqns = _copy_apqns_from_user(ktp.apqns, ktp.apqn_entries); + if (IS_ERR(apqns)) + return PTR_ERR(apqns); + kkey = _copy_key_from_user(ktp.key, ktp.keylen); + if (IS_ERR(kkey)) { + kfree(apqns); + return PTR_ERR(kkey); + } + protkey = kmalloc(protkeylen, GFP_KERNEL); + if (!protkey) { + kfree(apqns); + kfree(kkey); + return -ENOMEM; + } + rc = pkey_keyblob2pkey3(apqns, ktp.apqn_entries, kkey, + ktp.keylen, &ktp.pkeytype, + protkey, &protkeylen); + DEBUG_DBG("%s pkey_keyblob2pkey3()=%d\n", __func__, rc); + kfree(apqns); + kfree(kkey); + if (rc) { + kfree(protkey); + break; + } + if (ktp.pkey && ktp.pkeylen) { + if (protkeylen > ktp.pkeylen) { + kfree(protkey); + return -EINVAL; + } + if (copy_to_user(ktp.pkey, protkey, protkeylen)) { + kfree(protkey); + return -EFAULT; + } + } + kfree(protkey); + ktp.pkeylen = protkeylen; + if (copy_to_user(utp, &ktp, sizeof(ktp))) + return -EFAULT; + break; + } default: /* unknown/unsupported ioctl cmd */ return -ENOTTY; @@ -1589,7 +1811,7 @@ static ssize_t pkey_ccacipher_aes_attr_read(enum pkey_key_size keybits, /* build a list of apqns able to generate an cipher key */ rc = cca_findcard2(&apqns, &nr_apqns, 0xFFFF, 0xFFFF, - ZCRYPT_CEX6, 0, 0, 0); + ZCRYPT_CEX6, 0, 0, 0, 0); if (rc) return rc; @@ -1838,7 +2060,7 @@ static struct miscdevice pkey_dev = { */ static int __init pkey_init(void) { - cpacf_mask_t kmc_functions; + cpacf_mask_t func_mask; /* * The pckmo instruction should be available - even if we don't @@ -1846,15 +2068,15 @@ static int __init pkey_init(void) * is also the minimum level for the kmc instructions which * are able to work with protected keys. */ - if (!cpacf_query(CPACF_PCKMO, &pckmo_functions)) + if (!cpacf_query(CPACF_PCKMO, &func_mask)) return -ENODEV; /* check for kmc instructions available */ - if (!cpacf_query(CPACF_KMC, &kmc_functions)) + if (!cpacf_query(CPACF_KMC, &func_mask)) return -ENODEV; - if (!cpacf_test_func(&kmc_functions, CPACF_KMC_PAES_128) || - !cpacf_test_func(&kmc_functions, CPACF_KMC_PAES_192) || - !cpacf_test_func(&kmc_functions, CPACF_KMC_PAES_256)) + if (!cpacf_test_func(&func_mask, CPACF_KMC_PAES_128) || + !cpacf_test_func(&func_mask, CPACF_KMC_PAES_192) || + !cpacf_test_func(&func_mask, CPACF_KMC_PAES_256)) return -ENODEV; pkey_debug_init(); |