diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/s390/crypto/zcrypt_ep11misc.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/s390/crypto/zcrypt_ep11misc.c')
-rw-r--r-- | drivers/s390/crypto/zcrypt_ep11misc.c | 1633 |
1 files changed, 1633 insertions, 0 deletions
diff --git a/drivers/s390/crypto/zcrypt_ep11misc.c b/drivers/s390/crypto/zcrypt_ep11misc.c new file mode 100644 index 0000000000..0a877f9792 --- /dev/null +++ b/drivers/s390/crypto/zcrypt_ep11misc.c @@ -0,0 +1,1633 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright IBM Corp. 2019 + * Author(s): Harald Freudenberger <freude@linux.ibm.com> + * + * Collection of EP11 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 <crypto/aes.h> + +#include "ap_bus.h" +#include "zcrypt_api.h" +#include "zcrypt_debug.h" +#include "zcrypt_msgtype6.h" +#include "zcrypt_ep11misc.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__) + +#define EP11_PINBLOB_V1_BYTES 56 + +/* default iv used here */ +static const u8 def_iv[16] = { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, + 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff }; + +/* ep11 card info cache */ +struct card_list_entry { + struct list_head list; + u16 cardnr; + struct ep11_card_info info; +}; +static LIST_HEAD(card_list); +static DEFINE_SPINLOCK(card_list_lock); + +static int card_cache_fetch(u16 cardnr, struct ep11_card_info *ci) +{ + int rc = -ENOENT; + struct card_list_entry *ptr; + + spin_lock_bh(&card_list_lock); + list_for_each_entry(ptr, &card_list, list) { + if (ptr->cardnr == cardnr) { + memcpy(ci, &ptr->info, sizeof(*ci)); + rc = 0; + break; + } + } + spin_unlock_bh(&card_list_lock); + + return rc; +} + +static void card_cache_update(u16 cardnr, const struct ep11_card_info *ci) +{ + int found = 0; + struct card_list_entry *ptr; + + spin_lock_bh(&card_list_lock); + list_for_each_entry(ptr, &card_list, list) { + if (ptr->cardnr == cardnr) { + memcpy(&ptr->info, ci, sizeof(*ci)); + found = 1; + break; + } + } + if (!found) { + ptr = kmalloc(sizeof(*ptr), GFP_ATOMIC); + if (!ptr) { + spin_unlock_bh(&card_list_lock); + return; + } + ptr->cardnr = cardnr; + memcpy(&ptr->info, ci, sizeof(*ci)); + list_add(&ptr->list, &card_list); + } + spin_unlock_bh(&card_list_lock); +} + +static void card_cache_scrub(u16 cardnr) +{ + struct card_list_entry *ptr; + + spin_lock_bh(&card_list_lock); + list_for_each_entry(ptr, &card_list, list) { + if (ptr->cardnr == cardnr) { + list_del(&ptr->list); + kfree(ptr); + break; + } + } + spin_unlock_bh(&card_list_lock); +} + +static void __exit card_cache_free(void) +{ + struct card_list_entry *ptr, *pnext; + + spin_lock_bh(&card_list_lock); + list_for_each_entry_safe(ptr, pnext, &card_list, list) { + list_del(&ptr->list); + kfree(ptr); + } + spin_unlock_bh(&card_list_lock); +} + +static int ep11_kb_split(const u8 *kb, size_t kblen, u32 kbver, + struct ep11kblob_header **kbhdr, size_t *kbhdrsize, + u8 **kbpl, size_t *kbplsize) +{ + struct ep11kblob_header *hdr = NULL; + size_t hdrsize, plsize = 0; + int rc = -EINVAL; + u8 *pl = NULL; + + if (kblen < sizeof(struct ep11kblob_header)) + goto out; + hdr = (struct ep11kblob_header *)kb; + + switch (kbver) { + case TOKVER_EP11_AES: + /* header overlays the payload */ + hdrsize = 0; + break; + case TOKVER_EP11_ECC_WITH_HEADER: + case TOKVER_EP11_AES_WITH_HEADER: + /* payload starts after the header */ + hdrsize = sizeof(struct ep11kblob_header); + break; + default: + goto out; + } + + plsize = kblen - hdrsize; + pl = (u8 *)kb + hdrsize; + + if (kbhdr) + *kbhdr = hdr; + if (kbhdrsize) + *kbhdrsize = hdrsize; + if (kbpl) + *kbpl = pl; + if (kbplsize) + *kbplsize = plsize; + + rc = 0; +out: + return rc; +} + +static int ep11_kb_decode(const u8 *kb, size_t kblen, + struct ep11kblob_header **kbhdr, size_t *kbhdrsize, + struct ep11keyblob **kbpl, size_t *kbplsize) +{ + struct ep11kblob_header *tmph, *hdr = NULL; + size_t hdrsize = 0, plsize = 0; + struct ep11keyblob *pl = NULL; + int rc = -EINVAL; + u8 *tmpp; + + if (kblen < sizeof(struct ep11kblob_header)) + goto out; + tmph = (struct ep11kblob_header *)kb; + + if (tmph->type != TOKTYPE_NON_CCA && + tmph->len > kblen) + goto out; + + if (ep11_kb_split(kb, kblen, tmph->version, + &hdr, &hdrsize, &tmpp, &plsize)) + goto out; + + if (plsize < sizeof(struct ep11keyblob)) + goto out; + + if (!is_ep11_keyblob(tmpp)) + goto out; + + pl = (struct ep11keyblob *)tmpp; + plsize = hdr->len - hdrsize; + + if (kbhdr) + *kbhdr = hdr; + if (kbhdrsize) + *kbhdrsize = hdrsize; + if (kbpl) + *kbpl = pl; + if (kbplsize) + *kbplsize = plsize; + + rc = 0; +out: + return rc; +} + +/* + * For valid ep11 keyblobs, returns a reference to the wrappingkey verification + * pattern. Otherwise NULL. + */ +const u8 *ep11_kb_wkvp(const u8 *keyblob, size_t keybloblen) +{ + struct ep11keyblob *kb; + + if (ep11_kb_decode(keyblob, keybloblen, NULL, NULL, &kb, NULL)) + return NULL; + return kb->wkvp; +} +EXPORT_SYMBOL(ep11_kb_wkvp); + +/* + * Simple check if the key blob is a valid EP11 AES key blob with header. + */ +int ep11_check_aes_key_with_hdr(debug_info_t *dbg, int dbflvl, + const u8 *key, size_t keylen, int checkcpacfexp) +{ + struct ep11kblob_header *hdr = (struct ep11kblob_header *)key; + struct ep11keyblob *kb = (struct ep11keyblob *)(key + sizeof(*hdr)); + +#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__) + + if (keylen < sizeof(*hdr) + sizeof(*kb)) { + DBF("%s key check failed, keylen %zu < %zu\n", + __func__, keylen, sizeof(*hdr) + sizeof(*kb)); + return -EINVAL; + } + + if (hdr->type != TOKTYPE_NON_CCA) { + if (dbg) + DBF("%s key check failed, type 0x%02x != 0x%02x\n", + __func__, (int)hdr->type, TOKTYPE_NON_CCA); + return -EINVAL; + } + if (hdr->hver != 0x00) { + if (dbg) + DBF("%s key check failed, header version 0x%02x != 0x00\n", + __func__, (int)hdr->hver); + return -EINVAL; + } + if (hdr->version != TOKVER_EP11_AES_WITH_HEADER) { + if (dbg) + DBF("%s key check failed, version 0x%02x != 0x%02x\n", + __func__, (int)hdr->version, TOKVER_EP11_AES_WITH_HEADER); + return -EINVAL; + } + if (hdr->len > keylen) { + if (dbg) + DBF("%s key check failed, header len %d keylen %zu mismatch\n", + __func__, (int)hdr->len, keylen); + return -EINVAL; + } + if (hdr->len < sizeof(*hdr) + sizeof(*kb)) { + if (dbg) + DBF("%s key check failed, header len %d < %zu\n", + __func__, (int)hdr->len, sizeof(*hdr) + sizeof(*kb)); + return -EINVAL; + } + + if (kb->version != EP11_STRUCT_MAGIC) { + if (dbg) + DBF("%s key check failed, blob magic 0x%04x != 0x%04x\n", + __func__, (int)kb->version, EP11_STRUCT_MAGIC); + return -EINVAL; + } + if (checkcpacfexp && !(kb->attr & EP11_BLOB_PKEY_EXTRACTABLE)) { + if (dbg) + DBF("%s key check failed, PKEY_EXTRACTABLE is off\n", + __func__); + return -EINVAL; + } + +#undef DBF + + return 0; +} +EXPORT_SYMBOL(ep11_check_aes_key_with_hdr); + +/* + * Simple check if the key blob is a valid EP11 ECC key blob with header. + */ +int ep11_check_ecc_key_with_hdr(debug_info_t *dbg, int dbflvl, + const u8 *key, size_t keylen, int checkcpacfexp) +{ + struct ep11kblob_header *hdr = (struct ep11kblob_header *)key; + struct ep11keyblob *kb = (struct ep11keyblob *)(key + sizeof(*hdr)); + +#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__) + + if (keylen < sizeof(*hdr) + sizeof(*kb)) { + DBF("%s key check failed, keylen %zu < %zu\n", + __func__, keylen, sizeof(*hdr) + sizeof(*kb)); + return -EINVAL; + } + + if (hdr->type != TOKTYPE_NON_CCA) { + if (dbg) + DBF("%s key check failed, type 0x%02x != 0x%02x\n", + __func__, (int)hdr->type, TOKTYPE_NON_CCA); + return -EINVAL; + } + if (hdr->hver != 0x00) { + if (dbg) + DBF("%s key check failed, header version 0x%02x != 0x00\n", + __func__, (int)hdr->hver); + return -EINVAL; + } + if (hdr->version != TOKVER_EP11_ECC_WITH_HEADER) { + if (dbg) + DBF("%s key check failed, version 0x%02x != 0x%02x\n", + __func__, (int)hdr->version, TOKVER_EP11_ECC_WITH_HEADER); + return -EINVAL; + } + if (hdr->len > keylen) { + if (dbg) + DBF("%s key check failed, header len %d keylen %zu mismatch\n", + __func__, (int)hdr->len, keylen); + return -EINVAL; + } + if (hdr->len < sizeof(*hdr) + sizeof(*kb)) { + if (dbg) + DBF("%s key check failed, header len %d < %zu\n", + __func__, (int)hdr->len, sizeof(*hdr) + sizeof(*kb)); + return -EINVAL; + } + + if (kb->version != EP11_STRUCT_MAGIC) { + if (dbg) + DBF("%s key check failed, blob magic 0x%04x != 0x%04x\n", + __func__, (int)kb->version, EP11_STRUCT_MAGIC); + return -EINVAL; + } + if (checkcpacfexp && !(kb->attr & EP11_BLOB_PKEY_EXTRACTABLE)) { + if (dbg) + DBF("%s key check failed, PKEY_EXTRACTABLE is off\n", + __func__); + return -EINVAL; + } + +#undef DBF + + return 0; +} +EXPORT_SYMBOL(ep11_check_ecc_key_with_hdr); + +/* + * Simple check if the key blob is a valid EP11 AES key blob with + * the header in the session field (old style EP11 AES key). + */ +int ep11_check_aes_key(debug_info_t *dbg, int dbflvl, + const u8 *key, size_t keylen, int checkcpacfexp) +{ + struct ep11keyblob *kb = (struct ep11keyblob *)key; + +#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__) + + if (keylen < sizeof(*kb)) { + DBF("%s key check failed, keylen %zu < %zu\n", + __func__, keylen, sizeof(*kb)); + return -EINVAL; + } + + if (kb->head.type != TOKTYPE_NON_CCA) { + if (dbg) + DBF("%s key check failed, type 0x%02x != 0x%02x\n", + __func__, (int)kb->head.type, TOKTYPE_NON_CCA); + return -EINVAL; + } + if (kb->head.version != TOKVER_EP11_AES) { + if (dbg) + DBF("%s key check failed, version 0x%02x != 0x%02x\n", + __func__, (int)kb->head.version, TOKVER_EP11_AES); + return -EINVAL; + } + if (kb->head.len > keylen) { + if (dbg) + DBF("%s key check failed, header len %d keylen %zu mismatch\n", + __func__, (int)kb->head.len, keylen); + return -EINVAL; + } + if (kb->head.len < sizeof(*kb)) { + if (dbg) + DBF("%s key check failed, header len %d < %zu\n", + __func__, (int)kb->head.len, sizeof(*kb)); + return -EINVAL; + } + + if (kb->version != EP11_STRUCT_MAGIC) { + if (dbg) + DBF("%s key check failed, blob magic 0x%04x != 0x%04x\n", + __func__, (int)kb->version, EP11_STRUCT_MAGIC); + return -EINVAL; + } + if (checkcpacfexp && !(kb->attr & EP11_BLOB_PKEY_EXTRACTABLE)) { + if (dbg) + DBF("%s key check failed, PKEY_EXTRACTABLE is off\n", + __func__); + return -EINVAL; + } + +#undef DBF + + return 0; +} +EXPORT_SYMBOL(ep11_check_aes_key); + +/* + * Allocate and prepare ep11 cprb plus additional payload. + */ +static inline struct ep11_cprb *alloc_cprb(size_t payload_len) +{ + size_t len = sizeof(struct ep11_cprb) + payload_len; + struct ep11_cprb *cprb; + + cprb = kzalloc(len, GFP_KERNEL); + if (!cprb) + return NULL; + + cprb->cprb_len = sizeof(struct ep11_cprb); + cprb->cprb_ver_id = 0x04; + memcpy(cprb->func_id, "T4", 2); + cprb->ret_code = 0xFFFFFFFF; + cprb->payload_len = payload_len; + + return cprb; +} + +/* + * Some helper functions related to ASN1 encoding. + * Limited to length info <= 2 byte. + */ + +#define ASN1TAGLEN(x) (2 + (x) + ((x) > 127 ? 1 : 0) + ((x) > 255 ? 1 : 0)) + +static int asn1tag_write(u8 *ptr, u8 tag, const u8 *pvalue, u16 valuelen) +{ + ptr[0] = tag; + if (valuelen > 255) { + ptr[1] = 0x82; + *((u16 *)(ptr + 2)) = valuelen; + memcpy(ptr + 4, pvalue, valuelen); + return 4 + valuelen; + } + if (valuelen > 127) { + ptr[1] = 0x81; + ptr[2] = (u8)valuelen; + memcpy(ptr + 3, pvalue, valuelen); + return 3 + valuelen; + } + ptr[1] = (u8)valuelen; + memcpy(ptr + 2, pvalue, valuelen); + return 2 + valuelen; +} + +/* EP11 payload > 127 bytes starts with this struct */ +struct pl_head { + u8 tag; + u8 lenfmt; + u16 len; + u8 func_tag; + u8 func_len; + u32 func; + u8 dom_tag; + u8 dom_len; + u32 dom; +} __packed; + +/* prep ep11 payload head helper function */ +static inline void prep_head(struct pl_head *h, + size_t pl_size, int api, int func) +{ + h->tag = 0x30; + h->lenfmt = 0x82; + h->len = pl_size - 4; + h->func_tag = 0x04; + h->func_len = sizeof(u32); + h->func = (api << 16) + func; + h->dom_tag = 0x04; + h->dom_len = sizeof(u32); +} + +/* prep urb helper function */ +static inline void prep_urb(struct ep11_urb *u, + struct ep11_target_dev *t, int nt, + struct ep11_cprb *req, size_t req_len, + struct ep11_cprb *rep, size_t rep_len) +{ + u->targets = (u8 __user *)t; + u->targets_num = nt; + u->req = (u8 __user *)req; + u->req_len = req_len; + u->resp = (u8 __user *)rep; + u->resp_len = rep_len; +} + +/* Check ep11 reply payload, return 0 or suggested errno value. */ +static int check_reply_pl(const u8 *pl, const char *func) +{ + int len; + u32 ret; + + /* start tag */ + if (*pl++ != 0x30) { + DEBUG_ERR("%s reply start tag mismatch\n", func); + return -EIO; + } + + /* payload length format */ + if (*pl < 127) { + len = *pl; + pl++; + } else if (*pl == 0x81) { + pl++; + len = *pl; + pl++; + } else if (*pl == 0x82) { + pl++; + len = *((u16 *)pl); + pl += 2; + } else { + DEBUG_ERR("%s reply start tag lenfmt mismatch 0x%02hhx\n", + func, *pl); + return -EIO; + } + + /* len should cover at least 3 fields with 32 bit value each */ + if (len < 3 * 6) { + DEBUG_ERR("%s reply length %d too small\n", func, len); + return -EIO; + } + + /* function tag, length and value */ + if (pl[0] != 0x04 || pl[1] != 0x04) { + DEBUG_ERR("%s function tag or length mismatch\n", func); + return -EIO; + } + pl += 6; + + /* dom tag, length and value */ + if (pl[0] != 0x04 || pl[1] != 0x04) { + DEBUG_ERR("%s dom tag or length mismatch\n", func); + return -EIO; + } + pl += 6; + + /* return value tag, length and value */ + if (pl[0] != 0x04 || pl[1] != 0x04) { + DEBUG_ERR("%s return value tag or length mismatch\n", func); + return -EIO; + } + pl += 2; + ret = *((u32 *)pl); + if (ret != 0) { + DEBUG_ERR("%s return value 0x%04x != 0\n", func, ret); + return -EIO; + } + + return 0; +} + +/* + * Helper function which does an ep11 query with given query type. + */ +static int ep11_query_info(u16 cardnr, u16 domain, u32 query_type, + size_t buflen, u8 *buf) +{ + struct ep11_info_req_pl { + struct pl_head head; + u8 query_type_tag; + u8 query_type_len; + u32 query_type; + u8 query_subtype_tag; + u8 query_subtype_len; + u32 query_subtype; + } __packed * req_pl; + struct ep11_info_rep_pl { + struct pl_head head; + u8 rc_tag; + u8 rc_len; + u32 rc; + u8 data_tag; + u8 data_lenfmt; + u16 data_len; + } __packed * rep_pl; + struct ep11_cprb *req = NULL, *rep = NULL; + struct ep11_target_dev target; + struct ep11_urb *urb = NULL; + int api = EP11_API_V1, rc = -ENOMEM; + + /* request cprb and payload */ + req = alloc_cprb(sizeof(struct ep11_info_req_pl)); + if (!req) + goto out; + req_pl = (struct ep11_info_req_pl *)(((u8 *)req) + sizeof(*req)); + prep_head(&req_pl->head, sizeof(*req_pl), api, 38); /* get xcp info */ + req_pl->query_type_tag = 0x04; + req_pl->query_type_len = sizeof(u32); + req_pl->query_type = query_type; + req_pl->query_subtype_tag = 0x04; + req_pl->query_subtype_len = sizeof(u32); + + /* reply cprb and payload */ + rep = alloc_cprb(sizeof(struct ep11_info_rep_pl) + buflen); + if (!rep) + goto out; + rep_pl = (struct ep11_info_rep_pl *)(((u8 *)rep) + sizeof(*rep)); + + /* urb and target */ + urb = kmalloc(sizeof(*urb), GFP_KERNEL); + if (!urb) + goto out; + target.ap_id = cardnr; + target.dom_id = domain; + prep_urb(urb, &target, 1, + req, sizeof(*req) + sizeof(*req_pl), + rep, sizeof(*rep) + sizeof(*rep_pl) + buflen); + + rc = zcrypt_send_ep11_cprb(urb); + if (rc) { + DEBUG_ERR( + "%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n", + __func__, (int)cardnr, (int)domain, rc); + goto out; + } + + rc = check_reply_pl((u8 *)rep_pl, __func__); + if (rc) + goto out; + if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) { + DEBUG_ERR("%s unknown reply data format\n", __func__); + rc = -EIO; + goto out; + } + if (rep_pl->data_len > buflen) { + DEBUG_ERR("%s mismatch between reply data len and buffer len\n", + __func__); + rc = -ENOSPC; + goto out; + } + + memcpy(buf, ((u8 *)rep_pl) + sizeof(*rep_pl), rep_pl->data_len); + +out: + kfree(req); + kfree(rep); + kfree(urb); + return rc; +} + +/* + * Provide information about an EP11 card. + */ +int ep11_get_card_info(u16 card, struct ep11_card_info *info, int verify) +{ + int rc; + struct ep11_module_query_info { + u32 API_ord_nr; + u32 firmware_id; + u8 FW_major_vers; + u8 FW_minor_vers; + u8 CSP_major_vers; + u8 CSP_minor_vers; + u8 fwid[32]; + u8 xcp_config_hash[32]; + u8 CSP_config_hash[32]; + u8 serial[16]; + u8 module_date_time[16]; + u64 op_mode; + u32 PKCS11_flags; + u32 ext_flags; + u32 domains; + u32 sym_state_bytes; + u32 digest_state_bytes; + u32 pin_blob_bytes; + u32 SPKI_bytes; + u32 priv_key_blob_bytes; + u32 sym_blob_bytes; + u32 max_payload_bytes; + u32 CP_profile_bytes; + u32 max_CP_index; + } __packed * pmqi = NULL; + + rc = card_cache_fetch(card, info); + if (rc || verify) { + pmqi = kmalloc(sizeof(*pmqi), GFP_KERNEL); + if (!pmqi) + return -ENOMEM; + rc = ep11_query_info(card, AUTOSEL_DOM, + 0x01 /* module info query */, + sizeof(*pmqi), (u8 *)pmqi); + if (rc) { + if (rc == -ENODEV) + card_cache_scrub(card); + goto out; + } + memset(info, 0, sizeof(*info)); + info->API_ord_nr = pmqi->API_ord_nr; + info->FW_version = + (pmqi->FW_major_vers << 8) + pmqi->FW_minor_vers; + memcpy(info->serial, pmqi->serial, sizeof(info->serial)); + info->op_mode = pmqi->op_mode; + card_cache_update(card, info); + } + +out: + kfree(pmqi); + return rc; +} +EXPORT_SYMBOL(ep11_get_card_info); + +/* + * Provide information about a domain within an EP11 card. + */ +int ep11_get_domain_info(u16 card, u16 domain, struct ep11_domain_info *info) +{ + int rc; + struct ep11_domain_query_info { + u32 dom_index; + u8 cur_WK_VP[32]; + u8 new_WK_VP[32]; + u32 dom_flags; + u64 op_mode; + } __packed * p_dom_info; + + p_dom_info = kmalloc(sizeof(*p_dom_info), GFP_KERNEL); + if (!p_dom_info) + return -ENOMEM; + + rc = ep11_query_info(card, domain, 0x03 /* domain info query */, + sizeof(*p_dom_info), (u8 *)p_dom_info); + if (rc) + goto out; + + memset(info, 0, sizeof(*info)); + info->cur_wk_state = '0'; + info->new_wk_state = '0'; + if (p_dom_info->dom_flags & 0x10 /* left imprint mode */) { + if (p_dom_info->dom_flags & 0x02 /* cur wk valid */) { + info->cur_wk_state = '1'; + memcpy(info->cur_wkvp, p_dom_info->cur_WK_VP, 32); + } + if (p_dom_info->dom_flags & 0x04 || /* new wk present */ + p_dom_info->dom_flags & 0x08 /* new wk committed */) { + info->new_wk_state = + p_dom_info->dom_flags & 0x08 ? '2' : '1'; + memcpy(info->new_wkvp, p_dom_info->new_WK_VP, 32); + } + } + info->op_mode = p_dom_info->op_mode; + +out: + kfree(p_dom_info); + return rc; +} +EXPORT_SYMBOL(ep11_get_domain_info); + +/* + * Default EP11 AES key generate attributes, used when no keygenflags given: + * XCP_BLOB_ENCRYPT | XCP_BLOB_DECRYPT | XCP_BLOB_PROTKEY_EXTRACTABLE + */ +#define KEY_ATTR_DEFAULTS 0x00200c00 + +static int _ep11_genaeskey(u16 card, u16 domain, + u32 keybitsize, u32 keygenflags, + u8 *keybuf, size_t *keybufsize) +{ + struct keygen_req_pl { + struct pl_head head; + u8 var_tag; + u8 var_len; + u32 var; + u8 keybytes_tag; + u8 keybytes_len; + u32 keybytes; + u8 mech_tag; + u8 mech_len; + u32 mech; + u8 attr_tag; + u8 attr_len; + u32 attr_header; + u32 attr_bool_mask; + u32 attr_bool_bits; + u32 attr_val_len_type; + u32 attr_val_len_value; + /* followed by empty pin tag or empty pinblob tag */ + } __packed * req_pl; + struct keygen_rep_pl { + struct pl_head head; + u8 rc_tag; + u8 rc_len; + u32 rc; + u8 data_tag; + u8 data_lenfmt; + u16 data_len; + u8 data[512]; + } __packed * rep_pl; + struct ep11_cprb *req = NULL, *rep = NULL; + size_t req_pl_size, pinblob_size = 0; + struct ep11_target_dev target; + struct ep11_urb *urb = NULL; + int api, rc = -ENOMEM; + u8 *p; + + switch (keybitsize) { + case 128: + case 192: + case 256: + break; + default: + DEBUG_ERR( + "%s unknown/unsupported keybitsize %d\n", + __func__, keybitsize); + rc = -EINVAL; + goto out; + } + + /* request cprb and payload */ + api = (!keygenflags || keygenflags & 0x00200000) ? + EP11_API_V4 : EP11_API_V1; + if (ap_is_se_guest()) { + /* + * genkey within SE environment requires API ordinal 6 + * with empty pinblob + */ + api = EP11_API_V6; + pinblob_size = EP11_PINBLOB_V1_BYTES; + } + req_pl_size = sizeof(struct keygen_req_pl) + ASN1TAGLEN(pinblob_size); + req = alloc_cprb(req_pl_size); + if (!req) + goto out; + req_pl = (struct keygen_req_pl *)(((u8 *)req) + sizeof(*req)); + prep_head(&req_pl->head, req_pl_size, api, 21); /* GenerateKey */ + req_pl->var_tag = 0x04; + req_pl->var_len = sizeof(u32); + req_pl->keybytes_tag = 0x04; + req_pl->keybytes_len = sizeof(u32); + req_pl->keybytes = keybitsize / 8; + req_pl->mech_tag = 0x04; + req_pl->mech_len = sizeof(u32); + req_pl->mech = 0x00001080; /* CKM_AES_KEY_GEN */ + req_pl->attr_tag = 0x04; + req_pl->attr_len = 5 * sizeof(u32); + req_pl->attr_header = 0x10010000; + req_pl->attr_bool_mask = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS; + req_pl->attr_bool_bits = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS; + req_pl->attr_val_len_type = 0x00000161; /* CKA_VALUE_LEN */ + req_pl->attr_val_len_value = keybitsize / 8; + p = ((u8 *)req_pl) + sizeof(*req_pl); + /* pin tag */ + *p++ = 0x04; + *p++ = pinblob_size; + + /* reply cprb and payload */ + rep = alloc_cprb(sizeof(struct keygen_rep_pl)); + if (!rep) + goto out; + rep_pl = (struct keygen_rep_pl *)(((u8 *)rep) + sizeof(*rep)); + + /* urb and target */ + urb = kmalloc(sizeof(*urb), GFP_KERNEL); + if (!urb) + goto out; + target.ap_id = card; + target.dom_id = domain; + prep_urb(urb, &target, 1, + req, sizeof(*req) + req_pl_size, + rep, sizeof(*rep) + sizeof(*rep_pl)); + + rc = zcrypt_send_ep11_cprb(urb); + if (rc) { + DEBUG_ERR( + "%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n", + __func__, (int)card, (int)domain, rc); + goto out; + } + + rc = check_reply_pl((u8 *)rep_pl, __func__); + if (rc) + goto out; + if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) { + DEBUG_ERR("%s unknown reply data format\n", __func__); + rc = -EIO; + goto out; + } + if (rep_pl->data_len > *keybufsize) { + DEBUG_ERR("%s mismatch reply data len / key buffer len\n", + __func__); + rc = -ENOSPC; + goto out; + } + + /* copy key blob */ + memcpy(keybuf, rep_pl->data, rep_pl->data_len); + *keybufsize = rep_pl->data_len; + +out: + kfree(req); + kfree(rep); + kfree(urb); + return rc; +} + +int ep11_genaeskey(u16 card, u16 domain, u32 keybitsize, u32 keygenflags, + u8 *keybuf, size_t *keybufsize, u32 keybufver) +{ + struct ep11kblob_header *hdr; + size_t hdr_size, pl_size; + u8 *pl; + int rc; + + switch (keybufver) { + case TOKVER_EP11_AES: + case TOKVER_EP11_AES_WITH_HEADER: + break; + default: + return -EINVAL; + } + + rc = ep11_kb_split(keybuf, *keybufsize, keybufver, + &hdr, &hdr_size, &pl, &pl_size); + if (rc) + return rc; + + rc = _ep11_genaeskey(card, domain, keybitsize, keygenflags, + pl, &pl_size); + if (rc) + return rc; + + *keybufsize = hdr_size + pl_size; + + /* update header information */ + hdr->type = TOKTYPE_NON_CCA; + hdr->len = *keybufsize; + hdr->version = keybufver; + hdr->bitlen = keybitsize; + + return 0; +} +EXPORT_SYMBOL(ep11_genaeskey); + +static int ep11_cryptsingle(u16 card, u16 domain, + u16 mode, u32 mech, const u8 *iv, + const u8 *key, size_t keysize, + const u8 *inbuf, size_t inbufsize, + u8 *outbuf, size_t *outbufsize) +{ + struct crypt_req_pl { + struct pl_head head; + u8 var_tag; + u8 var_len; + u32 var; + u8 mech_tag; + u8 mech_len; + u32 mech; + /* + * maybe followed by iv data + * followed by key tag + key blob + * followed by plaintext tag + plaintext + */ + } __packed * req_pl; + struct crypt_rep_pl { + struct pl_head head; + u8 rc_tag; + u8 rc_len; + u32 rc; + u8 data_tag; + u8 data_lenfmt; + /* data follows */ + } __packed * rep_pl; + struct ep11_cprb *req = NULL, *rep = NULL; + struct ep11_target_dev target; + struct ep11_urb *urb = NULL; + size_t req_pl_size, rep_pl_size; + int n, api = EP11_API_V1, rc = -ENOMEM; + u8 *p; + + /* the simple asn1 coding used has length limits */ + if (keysize > 0xFFFF || inbufsize > 0xFFFF) + return -EINVAL; + + /* request cprb and payload */ + req_pl_size = sizeof(struct crypt_req_pl) + (iv ? 16 : 0) + + ASN1TAGLEN(keysize) + ASN1TAGLEN(inbufsize); + req = alloc_cprb(req_pl_size); + if (!req) + goto out; + req_pl = (struct crypt_req_pl *)(((u8 *)req) + sizeof(*req)); + prep_head(&req_pl->head, req_pl_size, api, (mode ? 20 : 19)); + req_pl->var_tag = 0x04; + req_pl->var_len = sizeof(u32); + /* mech is mech + mech params (iv here) */ + req_pl->mech_tag = 0x04; + req_pl->mech_len = sizeof(u32) + (iv ? 16 : 0); + req_pl->mech = (mech ? mech : 0x00001085); /* CKM_AES_CBC_PAD */ + p = ((u8 *)req_pl) + sizeof(*req_pl); + if (iv) { + memcpy(p, iv, 16); + p += 16; + } + /* key and input data */ + p += asn1tag_write(p, 0x04, key, keysize); + p += asn1tag_write(p, 0x04, inbuf, inbufsize); + + /* reply cprb and payload, assume out data size <= in data size + 32 */ + rep_pl_size = sizeof(struct crypt_rep_pl) + ASN1TAGLEN(inbufsize + 32); + rep = alloc_cprb(rep_pl_size); + if (!rep) + goto out; + rep_pl = (struct crypt_rep_pl *)(((u8 *)rep) + sizeof(*rep)); + + /* urb and target */ + urb = kmalloc(sizeof(*urb), GFP_KERNEL); + if (!urb) + goto out; + target.ap_id = card; + target.dom_id = domain; + prep_urb(urb, &target, 1, + req, sizeof(*req) + req_pl_size, + rep, sizeof(*rep) + rep_pl_size); + + rc = zcrypt_send_ep11_cprb(urb); + if (rc) { + DEBUG_ERR( + "%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n", + __func__, (int)card, (int)domain, rc); + goto out; + } + + rc = check_reply_pl((u8 *)rep_pl, __func__); + if (rc) + goto out; + if (rep_pl->data_tag != 0x04) { + DEBUG_ERR("%s unknown reply data format\n", __func__); + rc = -EIO; + goto out; + } + p = ((u8 *)rep_pl) + sizeof(*rep_pl); + if (rep_pl->data_lenfmt <= 127) { + n = rep_pl->data_lenfmt; + } else if (rep_pl->data_lenfmt == 0x81) { + n = *p++; + } else if (rep_pl->data_lenfmt == 0x82) { + n = *((u16 *)p); + p += 2; + } else { + DEBUG_ERR("%s unknown reply data length format 0x%02hhx\n", + __func__, rep_pl->data_lenfmt); + rc = -EIO; + goto out; + } + if (n > *outbufsize) { + DEBUG_ERR("%s mismatch reply data len %d / output buffer %zu\n", + __func__, n, *outbufsize); + rc = -ENOSPC; + goto out; + } + + memcpy(outbuf, p, n); + *outbufsize = n; + +out: + kfree(req); + kfree(rep); + kfree(urb); + return rc; +} + +static int _ep11_unwrapkey(u16 card, u16 domain, + const u8 *kek, size_t keksize, + const u8 *enckey, size_t enckeysize, + u32 mech, const u8 *iv, + u32 keybitsize, u32 keygenflags, + u8 *keybuf, size_t *keybufsize) +{ + struct uw_req_pl { + struct pl_head head; + u8 attr_tag; + u8 attr_len; + u32 attr_header; + u32 attr_bool_mask; + u32 attr_bool_bits; + u32 attr_key_type; + u32 attr_key_type_value; + u32 attr_val_len; + u32 attr_val_len_value; + u8 mech_tag; + u8 mech_len; + u32 mech; + /* + * maybe followed by iv data + * followed by kek tag + kek blob + * followed by empty mac tag + * followed by empty pin tag or empty pinblob tag + * followed by encryted key tag + bytes + */ + } __packed * req_pl; + struct uw_rep_pl { + struct pl_head head; + u8 rc_tag; + u8 rc_len; + u32 rc; + u8 data_tag; + u8 data_lenfmt; + u16 data_len; + u8 data[512]; + } __packed * rep_pl; + struct ep11_cprb *req = NULL, *rep = NULL; + size_t req_pl_size, pinblob_size = 0; + struct ep11_target_dev target; + struct ep11_urb *urb = NULL; + int api, rc = -ENOMEM; + u8 *p; + + /* request cprb and payload */ + api = (!keygenflags || keygenflags & 0x00200000) ? + EP11_API_V4 : EP11_API_V1; + if (ap_is_se_guest()) { + /* + * unwrap within SE environment requires API ordinal 6 + * with empty pinblob + */ + api = EP11_API_V6; + pinblob_size = EP11_PINBLOB_V1_BYTES; + } + req_pl_size = sizeof(struct uw_req_pl) + (iv ? 16 : 0) + + ASN1TAGLEN(keksize) + ASN1TAGLEN(0) + + ASN1TAGLEN(pinblob_size) + ASN1TAGLEN(enckeysize); + req = alloc_cprb(req_pl_size); + if (!req) + goto out; + req_pl = (struct uw_req_pl *)(((u8 *)req) + sizeof(*req)); + prep_head(&req_pl->head, req_pl_size, api, 34); /* UnwrapKey */ + req_pl->attr_tag = 0x04; + req_pl->attr_len = 7 * sizeof(u32); + req_pl->attr_header = 0x10020000; + req_pl->attr_bool_mask = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS; + req_pl->attr_bool_bits = keygenflags ? keygenflags : KEY_ATTR_DEFAULTS; + req_pl->attr_key_type = 0x00000100; /* CKA_KEY_TYPE */ + req_pl->attr_key_type_value = 0x0000001f; /* CKK_AES */ + req_pl->attr_val_len = 0x00000161; /* CKA_VALUE_LEN */ + req_pl->attr_val_len_value = keybitsize / 8; + /* mech is mech + mech params (iv here) */ + req_pl->mech_tag = 0x04; + req_pl->mech_len = sizeof(u32) + (iv ? 16 : 0); + req_pl->mech = (mech ? mech : 0x00001085); /* CKM_AES_CBC_PAD */ + p = ((u8 *)req_pl) + sizeof(*req_pl); + if (iv) { + memcpy(p, iv, 16); + p += 16; + } + /* kek */ + p += asn1tag_write(p, 0x04, kek, keksize); + /* empty mac key tag */ + *p++ = 0x04; + *p++ = 0; + /* pin tag */ + *p++ = 0x04; + *p++ = pinblob_size; + p += pinblob_size; + /* encrypted key value tag and bytes */ + p += asn1tag_write(p, 0x04, enckey, enckeysize); + + /* reply cprb and payload */ + rep = alloc_cprb(sizeof(struct uw_rep_pl)); + if (!rep) + goto out; + rep_pl = (struct uw_rep_pl *)(((u8 *)rep) + sizeof(*rep)); + + /* urb and target */ + urb = kmalloc(sizeof(*urb), GFP_KERNEL); + if (!urb) + goto out; + target.ap_id = card; + target.dom_id = domain; + prep_urb(urb, &target, 1, + req, sizeof(*req) + req_pl_size, + rep, sizeof(*rep) + sizeof(*rep_pl)); + + rc = zcrypt_send_ep11_cprb(urb); + if (rc) { + DEBUG_ERR( + "%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n", + __func__, (int)card, (int)domain, rc); + goto out; + } + + rc = check_reply_pl((u8 *)rep_pl, __func__); + if (rc) + goto out; + if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) { + DEBUG_ERR("%s unknown reply data format\n", __func__); + rc = -EIO; + goto out; + } + if (rep_pl->data_len > *keybufsize) { + DEBUG_ERR("%s mismatch reply data len / key buffer len\n", + __func__); + rc = -ENOSPC; + goto out; + } + + /* copy key blob */ + memcpy(keybuf, rep_pl->data, rep_pl->data_len); + *keybufsize = rep_pl->data_len; + +out: + kfree(req); + kfree(rep); + kfree(urb); + return rc; +} + +static int ep11_unwrapkey(u16 card, u16 domain, + const u8 *kek, size_t keksize, + const u8 *enckey, size_t enckeysize, + u32 mech, const u8 *iv, + u32 keybitsize, u32 keygenflags, + u8 *keybuf, size_t *keybufsize, + u8 keybufver) +{ + struct ep11kblob_header *hdr; + size_t hdr_size, pl_size; + u8 *pl; + int rc; + + rc = ep11_kb_split(keybuf, *keybufsize, keybufver, + &hdr, &hdr_size, &pl, &pl_size); + if (rc) + return rc; + + rc = _ep11_unwrapkey(card, domain, kek, keksize, enckey, enckeysize, + mech, iv, keybitsize, keygenflags, + pl, &pl_size); + if (rc) + return rc; + + *keybufsize = hdr_size + pl_size; + + /* update header information */ + hdr = (struct ep11kblob_header *)keybuf; + hdr->type = TOKTYPE_NON_CCA; + hdr->len = *keybufsize; + hdr->version = keybufver; + hdr->bitlen = keybitsize; + + return 0; +} + +static int _ep11_wrapkey(u16 card, u16 domain, + const u8 *key, size_t keysize, + u32 mech, const u8 *iv, + u8 *databuf, size_t *datasize) +{ + struct wk_req_pl { + struct pl_head head; + u8 var_tag; + u8 var_len; + u32 var; + u8 mech_tag; + u8 mech_len; + u32 mech; + /* + * followed by iv data + * followed by key tag + key blob + * followed by dummy kek param + * followed by dummy mac param + */ + } __packed * req_pl; + struct wk_rep_pl { + struct pl_head head; + u8 rc_tag; + u8 rc_len; + u32 rc; + u8 data_tag; + u8 data_lenfmt; + u16 data_len; + u8 data[1024]; + } __packed * rep_pl; + struct ep11_cprb *req = NULL, *rep = NULL; + struct ep11_target_dev target; + struct ep11_urb *urb = NULL; + size_t req_pl_size; + int api, rc = -ENOMEM; + u8 *p; + + /* request cprb and payload */ + req_pl_size = sizeof(struct wk_req_pl) + (iv ? 16 : 0) + + ASN1TAGLEN(keysize) + 4; + req = alloc_cprb(req_pl_size); + if (!req) + goto out; + if (!mech || mech == 0x80060001) + req->flags |= 0x20; /* CPACF_WRAP needs special bit */ + req_pl = (struct wk_req_pl *)(((u8 *)req) + sizeof(*req)); + api = (!mech || mech == 0x80060001) ? /* CKM_IBM_CPACF_WRAP */ + EP11_API_V4 : EP11_API_V1; + prep_head(&req_pl->head, req_pl_size, api, 33); /* WrapKey */ + req_pl->var_tag = 0x04; + req_pl->var_len = sizeof(u32); + /* mech is mech + mech params (iv here) */ + req_pl->mech_tag = 0x04; + req_pl->mech_len = sizeof(u32) + (iv ? 16 : 0); + req_pl->mech = (mech ? mech : 0x80060001); /* CKM_IBM_CPACF_WRAP */ + p = ((u8 *)req_pl) + sizeof(*req_pl); + if (iv) { + memcpy(p, iv, 16); + p += 16; + } + /* key blob */ + p += asn1tag_write(p, 0x04, key, keysize); + /* empty kek tag */ + *p++ = 0x04; + *p++ = 0; + /* empty mac tag */ + *p++ = 0x04; + *p++ = 0; + + /* reply cprb and payload */ + rep = alloc_cprb(sizeof(struct wk_rep_pl)); + if (!rep) + goto out; + rep_pl = (struct wk_rep_pl *)(((u8 *)rep) + sizeof(*rep)); + + /* urb and target */ + urb = kmalloc(sizeof(*urb), GFP_KERNEL); + if (!urb) + goto out; + target.ap_id = card; + target.dom_id = domain; + prep_urb(urb, &target, 1, + req, sizeof(*req) + req_pl_size, + rep, sizeof(*rep) + sizeof(*rep_pl)); + + rc = zcrypt_send_ep11_cprb(urb); + if (rc) { + DEBUG_ERR( + "%s zcrypt_send_ep11_cprb(card=%d dom=%d) failed, rc=%d\n", + __func__, (int)card, (int)domain, rc); + goto out; + } + + rc = check_reply_pl((u8 *)rep_pl, __func__); + if (rc) + goto out; + if (rep_pl->data_tag != 0x04 || rep_pl->data_lenfmt != 0x82) { + DEBUG_ERR("%s unknown reply data format\n", __func__); + rc = -EIO; + goto out; + } + if (rep_pl->data_len > *datasize) { + DEBUG_ERR("%s mismatch reply data len / data buffer len\n", + __func__); + rc = -ENOSPC; + goto out; + } + + /* copy the data from the cprb to the data buffer */ + memcpy(databuf, rep_pl->data, rep_pl->data_len); + *datasize = rep_pl->data_len; + +out: + kfree(req); + kfree(rep); + kfree(urb); + return rc; +} + +int ep11_clr2keyblob(u16 card, u16 domain, u32 keybitsize, u32 keygenflags, + const u8 *clrkey, u8 *keybuf, size_t *keybufsize, + u32 keytype) +{ + int rc; + u8 encbuf[64], *kek = NULL; + size_t clrkeylen, keklen, encbuflen = sizeof(encbuf); + + if (keybitsize == 128 || keybitsize == 192 || keybitsize == 256) { + clrkeylen = keybitsize / 8; + } else { + DEBUG_ERR( + "%s unknown/unsupported keybitsize %d\n", + __func__, keybitsize); + return -EINVAL; + } + + /* allocate memory for the temp kek */ + keklen = MAXEP11AESKEYBLOBSIZE; + kek = kmalloc(keklen, GFP_ATOMIC); + if (!kek) { + rc = -ENOMEM; + goto out; + } + + /* Step 1: generate AES 256 bit random kek key */ + rc = _ep11_genaeskey(card, domain, 256, + 0x00006c00, /* EN/DECRYPT, WRAP/UNWRAP */ + kek, &keklen); + if (rc) { + DEBUG_ERR( + "%s generate kek key failed, rc=%d\n", + __func__, rc); + goto out; + } + + /* Step 2: encrypt clear key value with the kek key */ + rc = ep11_cryptsingle(card, domain, 0, 0, def_iv, kek, keklen, + clrkey, clrkeylen, encbuf, &encbuflen); + if (rc) { + DEBUG_ERR( + "%s encrypting key value with kek key failed, rc=%d\n", + __func__, rc); + goto out; + } + + /* Step 3: import the encrypted key value as a new key */ + rc = ep11_unwrapkey(card, domain, kek, keklen, + encbuf, encbuflen, 0, def_iv, + keybitsize, 0, keybuf, keybufsize, keytype); + if (rc) { + DEBUG_ERR( + "%s importing key value as new key failed,, rc=%d\n", + __func__, rc); + goto out; + } + +out: + kfree(kek); + return rc; +} +EXPORT_SYMBOL(ep11_clr2keyblob); + +int ep11_kblob2protkey(u16 card, u16 dom, + const u8 *keyblob, size_t keybloblen, + u8 *protkey, u32 *protkeylen, u32 *protkeytype) +{ + struct ep11kblob_header *hdr; + struct ep11keyblob *key; + size_t wkbuflen, keylen; + struct wk_info { + u16 version; + u8 res1[16]; + u32 pkeytype; + u32 pkeybitsize; + u64 pkeysize; + u8 res2[8]; + u8 pkey[]; + } __packed * wki; + u8 *wkbuf = NULL; + int rc = -EIO; + + if (ep11_kb_decode((u8 *)keyblob, keybloblen, &hdr, NULL, &key, &keylen)) + return -EINVAL; + + if (hdr->version == TOKVER_EP11_AES) { + /* wipe overlayed header */ + memset(hdr, 0, sizeof(*hdr)); + } + /* !!! hdr is no longer a valid header !!! */ + + /* alloc temp working buffer */ + wkbuflen = (keylen + AES_BLOCK_SIZE) & (~(AES_BLOCK_SIZE - 1)); + wkbuf = kmalloc(wkbuflen, GFP_ATOMIC); + if (!wkbuf) + return -ENOMEM; + + /* ep11 secure key -> protected key + info */ + rc = _ep11_wrapkey(card, dom, (u8 *)key, keylen, + 0, def_iv, wkbuf, &wkbuflen); + if (rc) { + DEBUG_ERR( + "%s rewrapping ep11 key to pkey failed, rc=%d\n", + __func__, rc); + goto out; + } + wki = (struct wk_info *)wkbuf; + + /* check struct version and pkey type */ + if (wki->version != 1 || wki->pkeytype < 1 || wki->pkeytype > 5) { + DEBUG_ERR("%s wk info version %d or pkeytype %d mismatch.\n", + __func__, (int)wki->version, (int)wki->pkeytype); + rc = -EIO; + goto out; + } + + /* check protected key type field */ + switch (wki->pkeytype) { + case 1: /* AES */ + switch (wki->pkeysize) { + case 16 + 32: + /* AES 128 protected key */ + if (protkeytype) + *protkeytype = PKEY_KEYTYPE_AES_128; + break; + case 24 + 32: + /* AES 192 protected key */ + if (protkeytype) + *protkeytype = PKEY_KEYTYPE_AES_192; + break; + case 32 + 32: + /* AES 256 protected key */ + if (protkeytype) + *protkeytype = PKEY_KEYTYPE_AES_256; + break; + default: + DEBUG_ERR("%s unknown/unsupported AES pkeysize %d\n", + __func__, (int)wki->pkeysize); + rc = -EIO; + goto out; + } + break; + case 3: /* EC-P */ + case 4: /* EC-ED */ + case 5: /* EC-BP */ + if (protkeytype) + *protkeytype = PKEY_KEYTYPE_ECC; + break; + case 2: /* TDES */ + default: + DEBUG_ERR("%s unknown/unsupported key type %d\n", + __func__, (int)wki->pkeytype); + rc = -EIO; + goto out; + } + + /* copy the translated protected key */ + if (wki->pkeysize > *protkeylen) { + DEBUG_ERR("%s wk info pkeysize %llu > protkeysize %u\n", + __func__, wki->pkeysize, *protkeylen); + rc = -EINVAL; + goto out; + } + memcpy(protkey, wki->pkey, wki->pkeysize); + *protkeylen = wki->pkeysize; + +out: + kfree(wkbuf); + return rc; +} +EXPORT_SYMBOL(ep11_kblob2protkey); + +int ep11_findcard2(u32 **apqns, u32 *nr_apqns, u16 cardnr, u16 domain, + int minhwtype, int minapi, const u8 *wkvp) +{ + struct zcrypt_device_status_ext *device_status; + u32 *_apqns = NULL, _nr_apqns = 0; + int i, card, dom, rc = -ENOMEM; + struct ep11_domain_info edi; + struct ep11_card_info eci; + + /* fetch status of all crypto cards */ + device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT, + sizeof(struct zcrypt_device_status_ext), + GFP_KERNEL); + if (!device_status) + return -ENOMEM; + zcrypt_device_status_mask_ext(device_status); + + /* allocate 1k space for up to 256 apqns */ + _apqns = kmalloc_array(256, sizeof(u32), GFP_KERNEL); + if (!_apqns) { + kvfree(device_status); + return -ENOMEM; + } + + /* walk through all the crypto apqnss */ + for (i = 0; i < MAX_ZDEV_ENTRIES_EXT; i++) { + card = AP_QID_CARD(device_status[i].qid); + dom = AP_QID_QUEUE(device_status[i].qid); + /* check online state */ + if (!device_status[i].online) + continue; + /* check for ep11 functions */ + if (!(device_status[i].functions & 0x01)) + continue; + /* check cardnr */ + if (cardnr != 0xFFFF && card != cardnr) + continue; + /* check domain */ + if (domain != 0xFFFF && dom != domain) + continue; + /* check min hardware type */ + if (minhwtype && device_status[i].hwtype < minhwtype) + continue; + /* check min api version if given */ + if (minapi > 0) { + if (ep11_get_card_info(card, &eci, 0)) + continue; + if (minapi > eci.API_ord_nr) + continue; + } + /* check wkvp if given */ + if (wkvp) { + if (ep11_get_domain_info(card, dom, &edi)) + continue; + if (edi.cur_wk_state != '1') + continue; + if (memcmp(wkvp, edi.cur_wkvp, 16)) + continue; + } + /* apqn passed all filtering criterons, add to the array */ + if (_nr_apqns < 256) + _apqns[_nr_apqns++] = (((u16)card) << 16) | ((u16)dom); + } + + /* nothing found ? */ + if (!_nr_apqns) { + kfree(_apqns); + rc = -ENODEV; + } else { + /* no re-allocation, simple return the _apqns array */ + *apqns = _apqns; + *nr_apqns = _nr_apqns; + rc = 0; + } + + kvfree(device_status); + return rc; +} +EXPORT_SYMBOL(ep11_findcard2); + +void __exit zcrypt_ep11misc_exit(void) +{ + card_cache_free(); +} |