diff options
Diffstat (limited to 'drivers/s390/crypto/pkey_api.c')
| -rw-r--r-- | drivers/s390/crypto/pkey_api.c | 2110 |
1 files changed, 594 insertions, 1516 deletions
diff --git a/drivers/s390/crypto/pkey_api.c b/drivers/s390/crypto/pkey_api.c index 2f92bbed4bf6..ad1cd699f53b 100644 --- a/drivers/s390/crypto/pkey_api.c +++ b/drivers/s390/crypto/pkey_api.c @@ -2,1263 +2,709 @@ /* * pkey device driver * - * Copyright IBM Corp. 2017 + * Copyright IBM Corp. 2017, 2023 + * * Author(s): Harald Freudenberger */ -#define KMSG_COMPONENT "pkey" -#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt +#define pr_fmt(fmt) "pkey: " fmt -#include <linux/fs.h> #include <linux/init.h> #include <linux/miscdevice.h> -#include <linux/module.h> +#include <linux/export.h> #include <linux/slab.h> -#include <linux/kallsyms.h> -#include <linux/debugfs.h> -#include <linux/random.h> -#include <linux/cpufeature.h> -#include <asm/zcrypt.h> -#include <asm/cpacf.h> -#include <asm/pkey.h> -#include <crypto/aes.h> #include "zcrypt_api.h" +#include "zcrypt_ccamisc.h" -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("IBM Corporation"); -MODULE_DESCRIPTION("s390 protected key interface"); - -/* 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 - -/* mask of available pckmo subfunctions, fetched once at module init */ -static cpacf_mask_t pckmo_functions; +#include "pkey_base.h" /* - * debug feature data and functions + * Helper functions */ - -static debug_info_t *debug_info; - -#define DEBUG_DBG(...) debug_sprintf_event(debug_info, 6, ##__VA_ARGS__) -#define DEBUG_INFO(...) debug_sprintf_event(debug_info, 5, ##__VA_ARGS__) -#define DEBUG_WARN(...) debug_sprintf_event(debug_info, 4, ##__VA_ARGS__) -#define DEBUG_ERR(...) debug_sprintf_event(debug_info, 3, ##__VA_ARGS__) - -static void __init pkey_debug_init(void) +static int key2protkey(const struct pkey_apqn *apqns, size_t nr_apqns, + const u8 *key, size_t keylen, + u8 *protkey, u32 *protkeylen, u32 *protkeytype, + u32 xflags) { - debug_info = debug_register("pkey", 1, 1, 4 * sizeof(long)); - debug_register_view(debug_info, &debug_sprintf_view); - debug_set_level(debug_info, 3); -} + int rc; -static void __exit pkey_debug_exit(void) -{ - debug_unregister(debug_info); -} + /* try the direct way */ + rc = pkey_handler_key_to_protkey(apqns, nr_apqns, + key, keylen, + protkey, protkeylen, + protkeytype, xflags); + + /* if this did not work, try the slowpath way */ + if (rc == -ENODEV) { + rc = pkey_handler_slowpath_key_to_protkey(apqns, nr_apqns, + key, keylen, + protkey, protkeylen, + protkeytype, xflags); + if (rc) + rc = -ENODEV; + } -/* Key token types */ -#define TOKTYPE_NON_CCA 0x00 /* Non-CCA key token */ -#define TOKTYPE_CCA_INTERNAL 0x01 /* CCA internal key token */ - -/* For TOKTYPE_NON_CCA: */ -#define TOKVER_PROTECTED_KEY 0x01 /* Protected key token */ - -/* For TOKTYPE_CCA_INTERNAL: */ -#define TOKVER_CCA_AES 0x04 /* CCA AES key token */ - -/* header part of a key token */ -struct keytoken_header { - u8 type; /* one of the TOKTYPE values */ - u8 res0[3]; - u8 version; /* one of the TOKVER values */ - u8 res1[3]; -} __packed; - -/* inside view of a secure key token (only type 0x01 version 0x04) */ -struct secaeskeytoken { - u8 type; /* 0x01 for internal key token */ - u8 res0[3]; - u8 version; /* should be 0x04 */ - u8 res1[1]; - u8 flag; /* key flags */ - u8 res2[1]; - u64 mkvp; /* master key verification pattern */ - u8 key[32]; /* key value (encrypted) */ - u8 cv[8]; /* control vector */ - u16 bitsize; /* key bit size */ - u16 keysize; /* key byte size */ - u8 tvv[4]; /* token validation value */ -} __packed; - -/* inside view of a protected key token (only type 0x00 version 0x01) */ -struct protaeskeytoken { - u8 type; /* 0x00 for PAES specific key tokens */ - u8 res0[3]; - u8 version; /* should be 0x01 for protected AES key token */ - u8 res1[3]; - u32 keytype; /* key type, one of the PKEY_KEYTYPE values */ - u32 len; /* bytes actually stored in protkey[] */ - u8 protkey[MAXPROTKEYSIZE]; /* the protected key blob */ -} __packed; + pr_debug("rc=%d\n", rc); + return rc; +} /* - * Simple check if the token is a valid CCA secure AES key - * token. If keybitsize is given, the bitsize of the key is - * also checked. Returns 0 on success or errno value on failure. + * In-Kernel function: Transform a key blob (of any type) into a protected key */ -static int check_secaeskeytoken(const u8 *token, int keybitsize) +int pkey_key2protkey(const u8 *key, u32 keylen, + u8 *protkey, u32 *protkeylen, u32 *protkeytype, u32 xflags) { - struct secaeskeytoken *t = (struct secaeskeytoken *) token; + int rc; - if (t->type != TOKTYPE_CCA_INTERNAL) { - DEBUG_ERR( - "%s secure token check failed, type mismatch 0x%02x != 0x%02x\n", - __func__, (int) t->type, TOKTYPE_CCA_INTERNAL); - return -EINVAL; - } - if (t->version != TOKVER_CCA_AES) { - DEBUG_ERR( - "%s secure token check failed, version mismatch 0x%02x != 0x%02x\n", - __func__, (int) t->version, TOKVER_CCA_AES); - return -EINVAL; - } - if (keybitsize > 0 && t->bitsize != keybitsize) { - DEBUG_ERR( - "%s secure token check failed, bitsize mismatch %d != %d\n", - __func__, (int) t->bitsize, keybitsize); - return -EINVAL; + rc = key2protkey(NULL, 0, key, keylen, + protkey, protkeylen, protkeytype, xflags); + if (rc == -ENODEV) { + pkey_handler_request_modules(); + rc = key2protkey(NULL, 0, key, keylen, + protkey, protkeylen, protkeytype, xflags); } - return 0; + return rc; } +EXPORT_SYMBOL(pkey_key2protkey); /* - * 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. + * Ioctl functions */ -static int alloc_and_prep_cprbmem(size_t paramblen, - u8 **pcprbmem, - struct CPRBX **preqCPRB, - struct CPRBX **prepCPRB) + +static void *_copy_key_from_user(void __user *ukey, size_t keylen) { - 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; + if (!ukey || keylen < MINKEYBLOBBUFSIZE || keylen > KEYBLOBBUFSIZE) + return ERR_PTR(-EINVAL); - 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 *) preqcblk) + sizeof(struct CPRBX); - preqcblk->rpl_parmb = - ((u8 *) prepcblk) + sizeof(struct CPRBX); - } + return memdup_user(ukey, keylen); +} - *pcprbmem = cprbmem; - *preqCPRB = preqcblk; - *prepCPRB = prepcblk; +static void *_copy_apqns_from_user(void __user *uapqns, size_t nr_apqns) +{ + if (!uapqns || nr_apqns == 0) + return NULL; - return 0; + return memdup_array_user(uapqns, nr_apqns, sizeof(struct pkey_apqn)); } -/* - * 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) +static int pkey_ioctl_genseck(struct pkey_genseck __user *ugs) { - if (scrub) - memzero_explicit(mem, 2 * (sizeof(struct CPRBX) + paramblen)); - kfree(mem); + struct pkey_genseck kgs; + struct pkey_apqn apqn; + u32 keybuflen; + int rc; + + if (copy_from_user(&kgs, ugs, sizeof(kgs))) + return -EFAULT; + + apqn.card = kgs.cardnr; + apqn.domain = kgs.domain; + keybuflen = sizeof(kgs.seckey.seckey); + rc = pkey_handler_gen_key(&apqn, 1, + kgs.keytype, PKEY_TYPE_CCA_DATA, 0, 0, + kgs.seckey.seckey, &keybuflen, NULL, 0); + pr_debug("gen_key()=%d\n", rc); + if (!rc && copy_to_user(ugs, &kgs, sizeof(kgs))) + rc = -EFAULT; + memzero_explicit(&kgs, sizeof(kgs)); + + return rc; } -/* - * Helper function to prepare the xcrb struct - */ -static inline void prep_xcrb(struct ica_xcRB *pxcrb, - u16 cardnr, - struct CPRBX *preqcblk, - struct CPRBX *prepcblk) +static int pkey_ioctl_clr2seck(struct pkey_clr2seck __user *ucs) { - 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; + struct pkey_clr2seck kcs; + struct pkey_apqn apqn; + u32 keybuflen; + int rc; + + if (copy_from_user(&kcs, ucs, sizeof(kcs))) + return -EFAULT; + + apqn.card = kcs.cardnr; + apqn.domain = kcs.domain; + keybuflen = sizeof(kcs.seckey.seckey); + rc = pkey_handler_clr_to_key(&apqn, 1, + kcs.keytype, PKEY_TYPE_CCA_DATA, 0, 0, + kcs.clrkey.clrkey, + pkey_keytype_aes_to_size(kcs.keytype), + kcs.seckey.seckey, &keybuflen, NULL, 0); + pr_debug("clr_to_key()=%d\n", rc); + if (!rc && copy_to_user(ucs, &kcs, sizeof(kcs))) + rc = -EFAULT; + memzero_explicit(&kcs, sizeof(kcs)); + + return rc; } -/* - * Helper function which calls zcrypt_send_cprb with - * memory management segment adjusted to kernel space - * so that the copy_from_user called within this - * function do in fact copy from kernel space. - */ -static inline int _zcrypt_send_cprb(struct ica_xcRB *xcrb) +static int pkey_ioctl_sec2protk(struct pkey_sec2protk __user *usp) { + struct pkey_sec2protk ksp; + struct pkey_apqn apqn; int rc; - mm_segment_t old_fs = get_fs(); - set_fs(KERNEL_DS); - rc = zcrypt_send_cprb(xcrb); - set_fs(old_fs); + if (copy_from_user(&ksp, usp, sizeof(ksp))) + return -EFAULT; + + apqn.card = ksp.cardnr; + apqn.domain = ksp.domain; + ksp.protkey.len = sizeof(ksp.protkey.protkey); + rc = pkey_handler_key_to_protkey(&apqn, 1, + ksp.seckey.seckey, + sizeof(ksp.seckey.seckey), + ksp.protkey.protkey, + &ksp.protkey.len, &ksp.protkey.type, + 0); + pr_debug("key_to_protkey()=%d\n", rc); + if (!rc && copy_to_user(usp, &ksp, sizeof(ksp))) + rc = -EFAULT; + memzero_explicit(&ksp, sizeof(ksp)); return rc; } -/* - * Generate (random) AES secure key. - */ -int pkey_genseckey(u16 cardnr, u16 domain, - u32 keytype, struct pkey_seckey *seckey) +static int pkey_ioctl_clr2protk(struct pkey_clr2protk __user *ucp) { - int i, rc, keysize; - int seckeysize; - u8 *mem; - 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; - } *preqparm; - struct kgrepparm { - u8 subfunc_code[2]; - u16 rule_array_len; - struct lv3 { - u16 len; - u16 keyblocklen; - struct { - u16 toklen; - u16 tokattr; - u8 tok[0]; - /* ... some more data ... */ - } keyblock; - } lv3; - } *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 *) 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 (keytype) { - case PKEY_KEYTYPE_AES_128: - keysize = 16; - memcpy(preqparm->lv1.key_length, "KEYLN16 ", 8); - break; - case PKEY_KEYTYPE_AES_192: - keysize = 24; - memcpy(preqparm->lv1.key_length, "KEYLN24 ", 8); - break; - case PKEY_KEYTYPE_AES_256: - keysize = 32; - memcpy(preqparm->lv1.key_length, "KEYLN32 ", 8); - break; - default: - DEBUG_ERR( - "%s unknown/unsupported keytype %d\n", - __func__, keytype); - 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); + struct pkey_clr2protk kcp; + struct clearkeytoken *t; + u32 keylen; + u8 *tmpbuf; + int rc; - /* fill xcrb struct */ - prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk); + if (copy_from_user(&kcp, ucp, sizeof(kcp))) + return -EFAULT; - /* 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 with errno %d\n", - __func__, (int) cardnr, (int) domain, rc); - goto out; + /* build a 'clear key token' from the clear key value */ + keylen = pkey_keytype_aes_to_size(kcp.keytype); + if (!keylen) { + PKEY_DBF_ERR("%s unknown/unsupported keytype %u\n", + __func__, kcp.keytype); + memzero_explicit(&kcp, sizeof(kcp)); + return -EINVAL; } - - /* 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; + tmpbuf = kzalloc(sizeof(*t) + keylen, GFP_KERNEL); + if (!tmpbuf) { + memzero_explicit(&kcp, sizeof(kcp)); + return -ENOMEM; } + t = (struct clearkeytoken *)tmpbuf; + t->type = TOKTYPE_NON_CCA; + t->version = TOKVER_CLEAR_KEY; + t->keytype = (keylen - 8) >> 3; + t->len = keylen; + memcpy(t->clearkey, kcp.clrkey.clrkey, keylen); + kcp.protkey.len = sizeof(kcp.protkey.protkey); - /* process response cprb param block */ - prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX); - prepparm = (struct kgrepparm *) prepcblk->rpl_parmb; - - /* 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; - } + rc = key2protkey(NULL, 0, + tmpbuf, sizeof(*t) + keylen, + kcp.protkey.protkey, + &kcp.protkey.len, &kcp.protkey.type, 0); + pr_debug("key2protkey()=%d\n", rc); - /* check secure key token */ - rc = check_secaeskeytoken(prepparm->lv3.keyblock.tok, 8*keysize); - if (rc) { - rc = -EIO; - goto out; - } + kfree_sensitive(tmpbuf); - /* copy the generated secure key token */ - memcpy(seckey->seckey, prepparm->lv3.keyblock.tok, SECKEYBLOBSIZE); + if (!rc && copy_to_user(ucp, &kcp, sizeof(kcp))) + rc = -EFAULT; + memzero_explicit(&kcp, sizeof(kcp)); -out: - free_cprbmem(mem, PARMBSIZE, 0); return rc; } -EXPORT_SYMBOL(pkey_genseckey); -/* - * Generate an AES secure key with given key value. - */ -int pkey_clr2seckey(u16 cardnr, u16 domain, u32 keytype, - const struct pkey_clrkey *clrkey, - struct pkey_seckey *seckey) +static int pkey_ioctl_findcard(struct pkey_findcard __user *ufc) { - int rc, keysize, seckeysize; - u8 *mem; - 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; - } *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[0]; - /* ... some more data ... */ - } keyblock; - } lv3; - } *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 *) 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 (keytype) { - case PKEY_KEYTYPE_AES_128: - keysize = 16; - break; - case PKEY_KEYTYPE_AES_192: - keysize = 24; - break; - case PKEY_KEYTYPE_AES_256: - keysize = 32; - break; - default: - DEBUG_ERR( - "%s unknown/unsupported keytype %d\n", - __func__, keytype); - rc = -EINVAL; - goto out; - } - preqparm->lv1.len = sizeof(struct lv1) + keysize; - memcpy(preqparm->lv1.clrkey, 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 with errno %d\n", - __func__, (int) cardnr, (int) domain, rc); - goto out; - } + struct pkey_findcard kfc; + struct pkey_apqn *apqns; + size_t nr_apqns; + int rc; - /* 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; - } + if (copy_from_user(&kfc, ufc, sizeof(kfc))) + return -EFAULT; - /* process response cprb param block */ - prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX); - prepparm = (struct cmrepparm *) prepcblk->rpl_parmb; - - /* 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; - } + nr_apqns = MAXAPQNSINLIST; + apqns = kmalloc_array(nr_apqns, sizeof(struct pkey_apqn), GFP_KERNEL); + if (!apqns) + return -ENOMEM; - /* check secure key token */ - rc = check_secaeskeytoken(prepparm->lv3.keyblock.tok, 8*keysize); + rc = pkey_handler_apqns_for_key(kfc.seckey.seckey, + sizeof(kfc.seckey.seckey), + PKEY_FLAGS_MATCH_CUR_MKVP, + apqns, &nr_apqns, 0); + if (rc == -ENODEV) + rc = pkey_handler_apqns_for_key(kfc.seckey.seckey, + sizeof(kfc.seckey.seckey), + PKEY_FLAGS_MATCH_ALT_MKVP, + apqns, &nr_apqns, 0); + pr_debug("apqns_for_key()=%d\n", rc); if (rc) { - rc = -EIO; - goto out; + kfree(apqns); + return rc; } + kfc.cardnr = apqns[0].card; + kfc.domain = apqns[0].domain; + kfree(apqns); + if (copy_to_user(ufc, &kfc, sizeof(kfc))) + return -EFAULT; - /* copy the generated secure key token */ - memcpy(seckey->seckey, prepparm->lv3.keyblock.tok, SECKEYBLOBSIZE); - -out: - free_cprbmem(mem, PARMBSIZE, 1); - return rc; + return 0; } -EXPORT_SYMBOL(pkey_clr2seckey); -/* - * Derive a proteced key from the secure key blob. - */ -int pkey_sec2protkey(u16 cardnr, u16 domain, - const struct pkey_seckey *seckey, - struct pkey_protkey *protkey) +static int pkey_ioctl_skey2pkey(struct pkey_skey2pkey __user *usp) { + struct pkey_skey2pkey ksp; int rc; - u8 *mem; - 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[0]; /* 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 keylen; - u8 key[64]; /* the key (keylen bytes) */ - u16 keyattrlen; - u8 keyattr[32]; - u8 pad2[1]; - u8 vptype; - u8 vp[32]; /* verification pattern */ - } 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 USK request */ - preqparm = (struct uskreqparm *) 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->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 with errno %d\n", - __func__, (int) cardnr, (int) domain, rc); - goto out; - } + if (copy_from_user(&ksp, usp, sizeof(ksp))) + return -EFAULT; + + ksp.protkey.len = sizeof(ksp.protkey.protkey); + rc = pkey_handler_key_to_protkey(NULL, 0, + ksp.seckey.seckey, + sizeof(ksp.seckey.seckey), + ksp.protkey.protkey, + &ksp.protkey.len, + &ksp.protkey.type, 0); + pr_debug("key_to_protkey()=%d\n", rc); + if (!rc && copy_to_user(usp, &ksp, sizeof(ksp))) + rc = -EFAULT; + memzero_explicit(&ksp, sizeof(ksp)); - /* 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; - } - 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); - } + return rc; +} - /* process response cprb param block */ - prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX); - prepparm = (struct uskrepparm *) prepcblk->rpl_parmb; - - /* check the returned keyblock */ - if (prepparm->lv3.keyblock.version != 0x01) { - DEBUG_ERR( - "%s reply param keyblock version mismatch 0x%02x != 0x01\n", - __func__, (int) prepparm->lv3.keyblock.version); - rc = -EIO; - goto out; - } +static int pkey_ioctl_verifykey(struct pkey_verifykey __user *uvk) +{ + u32 keytype, keybitsize, flags; + struct pkey_verifykey kvk; + int rc; - /* copy the tanslated protected key */ - switch (prepparm->lv3.keyblock.keylen) { - case 16+32: - protkey->type = PKEY_KEYTYPE_AES_128; - break; - case 24+32: - protkey->type = PKEY_KEYTYPE_AES_192; - break; - case 32+32: - protkey->type = PKEY_KEYTYPE_AES_256; - break; - default: - DEBUG_ERR("%s unknown/unsupported keytype %d\n", - __func__, prepparm->lv3.keyblock.keylen); - rc = -EIO; - goto out; - } - protkey->len = prepparm->lv3.keyblock.keylen; - memcpy(protkey->protkey, prepparm->lv3.keyblock.key, protkey->len); + if (copy_from_user(&kvk, uvk, sizeof(kvk))) + return -EFAULT; + + kvk.cardnr = 0xFFFF; + kvk.domain = 0xFFFF; + rc = pkey_handler_verify_key(kvk.seckey.seckey, + sizeof(kvk.seckey.seckey), + &kvk.cardnr, &kvk.domain, + &keytype, &keybitsize, &flags, 0); + pr_debug("verify_key()=%d\n", rc); + if (!rc && keytype != PKEY_TYPE_CCA_DATA) + rc = -EINVAL; + kvk.attributes = PKEY_VERIFY_ATTR_AES; + kvk.keysize = (u16)keybitsize; + if (flags & PKEY_FLAGS_MATCH_ALT_MKVP) + kvk.attributes |= PKEY_VERIFY_ATTR_OLD_MKVP; + if (!rc && copy_to_user(uvk, &kvk, sizeof(kvk))) + rc = -EFAULT; + memzero_explicit(&kvk, sizeof(kvk)); -out: - free_cprbmem(mem, PARMBSIZE, 0); return rc; } -EXPORT_SYMBOL(pkey_sec2protkey); -/* - * Create a protected key from a clear key value. - */ -int pkey_clr2protkey(u32 keytype, - const struct pkey_clrkey *clrkey, - struct pkey_protkey *protkey) +static int pkey_ioctl_genprotk(struct pkey_genprotk __user *ugp) { - long fc; - int keysize; - u8 paramblock[64]; - - switch (keytype) { - case PKEY_KEYTYPE_AES_128: - keysize = 16; - fc = CPACF_PCKMO_ENC_AES_128_KEY; - break; - case PKEY_KEYTYPE_AES_192: - keysize = 24; - fc = CPACF_PCKMO_ENC_AES_192_KEY; - break; - case PKEY_KEYTYPE_AES_256: - keysize = 32; - fc = CPACF_PCKMO_ENC_AES_256_KEY; - break; - default: - DEBUG_ERR("%s unknown/unsupported keytype %d\n", - __func__, 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. - */ - if (!cpacf_test_func(&pckmo_functions, fc)) { - DEBUG_ERR("%s pckmo functions not available\n", __func__); - return -EOPNOTSUPP; - } - - /* prepare param block */ - memset(paramblock, 0, sizeof(paramblock)); - memcpy(paramblock, clrkey->clrkey, keysize); + struct pkey_genprotk kgp; + int rc; - /* call the pckmo instruction */ - cpacf_pckmo(fc, paramblock); + if (copy_from_user(&kgp, ugp, sizeof(kgp))) + return -EFAULT; - /* copy created protected key */ - protkey->type = keytype; - protkey->len = keysize + 32; - memcpy(protkey->protkey, paramblock, keysize + 32); + kgp.protkey.len = sizeof(kgp.protkey.protkey); + rc = pkey_handler_gen_key(NULL, 0, kgp.keytype, + PKEY_TYPE_PROTKEY, 0, 0, + kgp.protkey.protkey, &kgp.protkey.len, + &kgp.protkey.type, 0); + pr_debug("gen_key()=%d\n", rc); + if (!rc && copy_to_user(ugp, &kgp, sizeof(kgp))) + rc = -EFAULT; + memzero_explicit(&kgp, sizeof(kgp)); - return 0; + return rc; } -EXPORT_SYMBOL(pkey_clr2protkey); -/* - * query cryptographic facility from adapter - */ -static int query_crypto_facility(u16 cardnr, u16 domain, - const char *keyword, - u8 *rarray, size_t *rarraylen, - u8 *varray, size_t *varraylen) +static int pkey_ioctl_verifyprotk(struct pkey_verifyprotk __user *uvp) { + struct pkey_verifyprotk kvp; + struct protaeskeytoken *t; + u32 keytype; + u8 *tmpbuf; 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; - } *preqparm; - size_t parmbsize = sizeof(struct fqreqparm); - struct fqrepparm { - u8 subfunc_code[2]; - u8 lvdata[0]; - } *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 *) 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); + if (copy_from_user(&kvp, uvp, sizeof(kvp))) + return -EFAULT; - /* 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 with errno %d\n", - __func__, (int) cardnr, (int) domain, rc); - goto out; + keytype = pkey_aes_bitsize_to_keytype(8 * kvp.protkey.len); + if (!keytype) { + PKEY_DBF_ERR("%s unknown/unsupported protkey length %u\n", + __func__, kvp.protkey.len); + memzero_explicit(&kvp, sizeof(kvp)); + return -EINVAL; } - /* 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; + /* build a 'protected key token' from the raw protected key */ + tmpbuf = kzalloc(sizeof(*t), GFP_KERNEL); + if (!tmpbuf) { + memzero_explicit(&kvp, sizeof(kvp)); + return -ENOMEM; } + t = (struct protaeskeytoken *)tmpbuf; + t->type = TOKTYPE_NON_CCA; + t->version = TOKVER_PROTECTED_KEY; + t->keytype = keytype; + t->len = kvp.protkey.len; + memcpy(t->protkey, kvp.protkey.protkey, kvp.protkey.len); - /* process response cprb param block */ - prepcblk->rpl_parmb = ((u8 *) prepcblk) + sizeof(struct CPRBX); - prepparm = (struct fqrepparm *) prepcblk->rpl_parmb; - 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; - } + rc = pkey_handler_verify_key(tmpbuf, sizeof(*t), + NULL, NULL, NULL, NULL, NULL, 0); + pr_debug("verify_key()=%d\n", rc); + + kfree_sensitive(tmpbuf); + memzero_explicit(&kvp, sizeof(kvp)); -out: - free_cprbmem(mem, parmbsize, 0); return rc; } -/* - * Fetch the current and old mkvp values via - * query_crypto_facility from adapter. - */ -static int fetch_mkvp(u16 cardnr, u16 domain, u64 mkvp[2]) +static int pkey_ioctl_kblob2protk(struct pkey_kblob2pkey __user *utp) { - int rc, found = 0; - size_t rlen, vlen; - u8 *rarray, *varray, *pg; - - pg = (u8 *) __get_free_page(GFP_KERNEL); - if (!pg) - return -ENOMEM; - rarray = pg; - varray = pg + PAGE_SIZE/2; - rlen = vlen = PAGE_SIZE/2; - - rc = query_crypto_facility(cardnr, domain, "STATICSA", - rarray, &rlen, varray, &vlen); - if (rc == 0 && rlen > 8*8 && vlen > 184+8) { - if (rarray[8*8] == '2') { - /* current master key state is valid */ - mkvp[0] = *((u64 *)(varray + 184)); - mkvp[1] = *((u64 *)(varray + 172)); - found = 1; - } - } - - free_page((unsigned long) pg); - - return found ? 0 : -ENOENT; -} - -/* struct to hold cached mkvp info for each card/domain */ -struct mkvp_info { - struct list_head list; - u16 cardnr; - u16 domain; - u64 mkvp[2]; -}; - -/* a list with mkvp_info entries */ -static LIST_HEAD(mkvp_list); -static DEFINE_SPINLOCK(mkvp_list_lock); + struct pkey_kblob2pkey ktp; + u8 *kkey; + int rc; -static int mkvp_cache_fetch(u16 cardnr, u16 domain, u64 mkvp[2]) -{ - int rc = -ENOENT; - struct mkvp_info *ptr; - - spin_lock_bh(&mkvp_list_lock); - list_for_each_entry(ptr, &mkvp_list, list) { - if (ptr->cardnr == cardnr && - ptr->domain == domain) { - memcpy(mkvp, ptr->mkvp, 2 * sizeof(u64)); - rc = 0; - break; - } - } - spin_unlock_bh(&mkvp_list_lock); + if (copy_from_user(&ktp, utp, sizeof(ktp))) + return -EFAULT; + kkey = _copy_key_from_user(ktp.key, ktp.keylen); + if (IS_ERR(kkey)) + return PTR_ERR(kkey); + ktp.protkey.len = sizeof(ktp.protkey.protkey); + rc = key2protkey(NULL, 0, kkey, ktp.keylen, + ktp.protkey.protkey, &ktp.protkey.len, + &ktp.protkey.type, 0); + pr_debug("key2protkey()=%d\n", rc); + kfree_sensitive(kkey); + if (!rc && copy_to_user(utp, &ktp, sizeof(ktp))) + rc = -EFAULT; + memzero_explicit(&ktp, sizeof(ktp)); return rc; } -static void mkvp_cache_update(u16 cardnr, u16 domain, u64 mkvp[2]) +static int pkey_ioctl_genseck2(struct pkey_genseck2 __user *ugs) { - int found = 0; - struct mkvp_info *ptr; - - spin_lock_bh(&mkvp_list_lock); - list_for_each_entry(ptr, &mkvp_list, list) { - if (ptr->cardnr == cardnr && - ptr->domain == domain) { - memcpy(ptr->mkvp, mkvp, 2 * sizeof(u64)); - found = 1; - break; - } + u32 klen = KEYBLOBBUFSIZE; + struct pkey_genseck2 kgs; + struct pkey_apqn *apqns; + u8 *kkey; + int rc; + u32 u; + + if (copy_from_user(&kgs, ugs, sizeof(kgs))) + return -EFAULT; + u = pkey_aes_bitsize_to_keytype(kgs.size); + if (!u) { + PKEY_DBF_ERR("%s unknown/unsupported keybitsize %d\n", + __func__, kgs.size); + return -EINVAL; } - if (!found) { - ptr = kmalloc(sizeof(*ptr), GFP_ATOMIC); - if (!ptr) { - spin_unlock_bh(&mkvp_list_lock); - return; - } - ptr->cardnr = cardnr; - ptr->domain = domain; - memcpy(ptr->mkvp, mkvp, 2 * sizeof(u64)); - list_add(&ptr->list, &mkvp_list); + apqns = _copy_apqns_from_user(kgs.apqns, kgs.apqn_entries); + if (IS_ERR(apqns)) + return PTR_ERR(apqns); + kkey = kzalloc(klen, GFP_KERNEL); + if (!kkey) { + kfree(apqns); + return -ENOMEM; } - spin_unlock_bh(&mkvp_list_lock); -} - -static void mkvp_cache_scrub(u16 cardnr, u16 domain) -{ - struct mkvp_info *ptr; - - spin_lock_bh(&mkvp_list_lock); - list_for_each_entry(ptr, &mkvp_list, list) { - if (ptr->cardnr == cardnr && - ptr->domain == domain) { - list_del(&ptr->list); - kfree(ptr); - break; + rc = pkey_handler_gen_key(apqns, kgs.apqn_entries, + u, kgs.type, kgs.size, kgs.keygenflags, + kkey, &klen, NULL, 0); + pr_debug("gen_key()=%d\n", rc); + kfree(apqns); + if (rc) { + kfree_sensitive(kkey); + return rc; + } + if (kgs.key) { + if (kgs.keylen < klen) { + kfree_sensitive(kkey); + return -EINVAL; + } + if (copy_to_user(kgs.key, kkey, klen)) { + kfree_sensitive(kkey); + return -EFAULT; } } - spin_unlock_bh(&mkvp_list_lock); -} + kgs.keylen = klen; + if (copy_to_user(ugs, &kgs, sizeof(kgs))) + rc = -EFAULT; + kfree_sensitive(kkey); -static void __exit mkvp_cache_free(void) -{ - struct mkvp_info *ptr, *pnext; - - spin_lock_bh(&mkvp_list_lock); - list_for_each_entry_safe(ptr, pnext, &mkvp_list, list) { - list_del(&ptr->list); - kfree(ptr); - } - spin_unlock_bh(&mkvp_list_lock); + return rc; } -/* - * Search for a matching crypto card based on the Master Key - * Verification Pattern provided inside a secure key. - */ -int pkey_findcard(const struct pkey_seckey *seckey, - u16 *pcardnr, u16 *pdomain, int verify) +static int pkey_ioctl_clr2seck2(struct pkey_clr2seck2 __user *ucs) { - struct secaeskeytoken *t = (struct secaeskeytoken *) seckey; - struct zcrypt_device_status_ext *device_status; - u16 card, dom; - u64 mkvp[2]; - int i, rc, oi = -1; - - /* mkvp must not be zero */ - if (t->mkvp == 0) + u32 klen = KEYBLOBBUFSIZE; + struct pkey_clr2seck2 kcs; + struct pkey_apqn *apqns; + u8 *kkey; + int rc; + u32 u; + + if (copy_from_user(&kcs, ucs, sizeof(kcs))) + return -EFAULT; + u = pkey_aes_bitsize_to_keytype(kcs.size); + if (!u) { + PKEY_DBF_ERR("%s unknown/unsupported keybitsize %d\n", + __func__, kcs.size); + memzero_explicit(&kcs, sizeof(kcs)); return -EINVAL; - - /* fetch status of all crypto cards */ - device_status = kmalloc_array(MAX_ZDEV_ENTRIES_EXT, - sizeof(struct zcrypt_device_status_ext), - GFP_KERNEL); - if (!device_status) + } + apqns = _copy_apqns_from_user(kcs.apqns, kcs.apqn_entries); + if (IS_ERR(apqns)) { + memzero_explicit(&kcs, sizeof(kcs)); + return PTR_ERR(apqns); + } + kkey = kzalloc(klen, GFP_KERNEL); + if (!kkey) { + kfree(apqns); + memzero_explicit(&kcs, sizeof(kcs)); 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) { - /* an enabled CCA Coprocessor card */ - /* try cached mkvp */ - if (mkvp_cache_fetch(card, dom, mkvp) == 0 && - t->mkvp == mkvp[0]) { - if (!verify) - break; - /* verify: fetch mkvp from adapter */ - if (fetch_mkvp(card, dom, mkvp) == 0) { - mkvp_cache_update(card, dom, mkvp); - if (t->mkvp == mkvp[0]) - break; - } - } - } else { - /* Card is offline and/or not a CCA card. */ - /* del mkvp entry from cache if it exists */ - mkvp_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_mkvp(card, dom, mkvp) == 0) { - mkvp_cache_update(card, dom, mkvp); - if (t->mkvp == mkvp[0]) - break; - if (t->mkvp == mkvp[1] && oi < 0) - oi = i; - } + rc = pkey_handler_clr_to_key(apqns, kcs.apqn_entries, + u, kcs.type, kcs.size, kcs.keygenflags, + kcs.clrkey.clrkey, kcs.size / 8, + kkey, &klen, NULL, 0); + pr_debug("clr_to_key()=%d\n", rc); + kfree(apqns); + if (rc) { + kfree_sensitive(kkey); + memzero_explicit(&kcs, sizeof(kcs)); + return rc; + } + if (kcs.key) { + if (kcs.keylen < klen) { + kfree_sensitive(kkey); + memzero_explicit(&kcs, sizeof(kcs)); + return -EINVAL; } - 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 (copy_to_user(kcs.key, kkey, klen)) { + kfree_sensitive(kkey); + memzero_explicit(&kcs, sizeof(kcs)); + return -EFAULT; } } - if (i < MAX_ZDEV_ENTRIES_EXT || oi >= 0) { - if (pcardnr) - *pcardnr = card; - if (pdomain) - *pdomain = dom; - rc = 0; - } else - rc = -ENODEV; - - kfree(device_status); + kcs.keylen = klen; + if (copy_to_user(ucs, &kcs, sizeof(kcs))) + rc = -EFAULT; + memzero_explicit(&kcs, sizeof(kcs)); + kfree_sensitive(kkey); + return rc; } -EXPORT_SYMBOL(pkey_findcard); -/* - * Find card and transform secure key into protected key. - */ -int pkey_skey2pkey(const struct pkey_seckey *seckey, - struct pkey_protkey *protkey) +static int pkey_ioctl_verifykey2(struct pkey_verifykey2 __user *uvk) { - u16 cardnr, domain; - int rc, verify; - - /* - * The pkey_sec2protkey call may fail when a card has been - * addressed where the master key was changed after last fetch - * of the mkvp into the cache. So first try without verify then - * with verify enabled (thus refreshing the mkvp for each card). - */ - for (verify = 0; verify < 2; verify++) { - rc = pkey_findcard(seckey, &cardnr, &domain, verify); - if (rc) - continue; - rc = pkey_sec2protkey(cardnr, domain, seckey, protkey); - if (rc == 0) - break; - } + struct pkey_verifykey2 kvk; + u8 *kkey; + int rc; - if (rc) - DEBUG_DBG("%s failed rc=%d\n", __func__, rc); + if (copy_from_user(&kvk, uvk, sizeof(kvk))) + return -EFAULT; + kkey = _copy_key_from_user(kvk.key, kvk.keylen); + if (IS_ERR(kkey)) + return PTR_ERR(kkey); + + rc = pkey_handler_verify_key(kkey, kvk.keylen, + &kvk.cardnr, &kvk.domain, + &kvk.type, &kvk.size, &kvk.flags, 0); + pr_debug("verify_key()=%d\n", rc); + + kfree_sensitive(kkey); + if (!rc && copy_to_user(uvk, &kvk, sizeof(kvk))) + return -EFAULT; return rc; } -EXPORT_SYMBOL(pkey_skey2pkey); -/* - * Verify key and give back some info about the key. - */ -int pkey_verifykey(const struct pkey_seckey *seckey, - u16 *pcardnr, u16 *pdomain, - u16 *pkeysize, u32 *pattributes) +static int pkey_ioctl_kblob2protk2(struct pkey_kblob2pkey2 __user *utp) { - struct secaeskeytoken *t = (struct secaeskeytoken *) seckey; - u16 cardnr, domain; - u64 mkvp[2]; + struct pkey_apqn *apqns = NULL; + struct pkey_kblob2pkey2 ktp; + u8 *kkey; int rc; - /* check the secure key for valid AES secure key */ - rc = check_secaeskeytoken((u8 *) seckey, 0); - if (rc) - goto out; - if (pattributes) - *pattributes = PKEY_VERIFY_ATTR_AES; - if (pkeysize) - *pkeysize = t->bitsize; - - /* try to find a card which can handle this key */ - rc = pkey_findcard(seckey, &cardnr, &domain, 1); - if (rc) - goto out; - - /* check mkvp for old mkvp match */ - rc = mkvp_cache_fetch(cardnr, domain, mkvp); - if (rc) - goto out; - if (t->mkvp == mkvp[1]) { - DEBUG_DBG("%s secure key has old mkvp\n", __func__); - if (pattributes) - *pattributes |= PKEY_VERIFY_ATTR_OLD_MKVP; - } - - if (pcardnr) - *pcardnr = cardnr; - if (pdomain) - *pdomain = domain; + 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); + } + ktp.protkey.len = sizeof(ktp.protkey.protkey); + rc = key2protkey(apqns, ktp.apqn_entries, kkey, ktp.keylen, + ktp.protkey.protkey, &ktp.protkey.len, + &ktp.protkey.type, 0); + pr_debug("key2protkey()=%d\n", rc); + kfree(apqns); + kfree_sensitive(kkey); + if (!rc && copy_to_user(utp, &ktp, sizeof(ktp))) + rc = -EFAULT; + memzero_explicit(&ktp, sizeof(ktp)); -out: - DEBUG_DBG("%s rc=%d\n", __func__, rc); return rc; } -EXPORT_SYMBOL(pkey_verifykey); -/* - * Generate a random protected key - */ -int pkey_genprotkey(__u32 keytype, struct pkey_protkey *protkey) +static int pkey_ioctl_apqns4k(struct pkey_apqns4key __user *uak) { - struct pkey_clrkey clrkey; - int keysize; + struct pkey_apqn *apqns = NULL; + struct pkey_apqns4key kak; + size_t nr_apqns, len; + u8 *kkey; int rc; - switch (keytype) { - case PKEY_KEYTYPE_AES_128: - keysize = 16; - break; - case PKEY_KEYTYPE_AES_192: - keysize = 24; - break; - case PKEY_KEYTYPE_AES_256: - keysize = 32; - break; - default: - DEBUG_ERR("%s unknown/unsupported keytype %d\n", __func__, - keytype); - return -EINVAL; + if (copy_from_user(&kak, uak, sizeof(kak))) + return -EFAULT; + nr_apqns = kak.apqn_entries; + if (nr_apqns) { + apqns = kmalloc_array(nr_apqns, + sizeof(struct pkey_apqn), + GFP_KERNEL); + if (!apqns) + return -ENOMEM; } - - /* generate a dummy random clear key */ - get_random_bytes(clrkey.clrkey, keysize); - - /* convert it to a dummy protected key */ - rc = pkey_clr2protkey(keytype, &clrkey, protkey); - if (rc) + kkey = _copy_key_from_user(kak.key, kak.keylen); + if (IS_ERR(kkey)) { + kfree(apqns); + return PTR_ERR(kkey); + } + rc = pkey_handler_apqns_for_key(kkey, kak.keylen, kak.flags, + apqns, &nr_apqns, 0); + pr_debug("apqns_for_key()=%d\n", rc); + kfree_sensitive(kkey); + if (rc && rc != -ENOSPC) { + kfree(apqns); return rc; - - /* replace the key part of the protected key with random bytes */ - get_random_bytes(protkey->protkey, keysize); - - return 0; -} -EXPORT_SYMBOL(pkey_genprotkey); - -/* - * Verify if a protected key is still valid - */ -int pkey_verifyprotkey(const struct pkey_protkey *protkey) -{ - unsigned long fc; - struct { - u8 iv[AES_BLOCK_SIZE]; - u8 key[MAXPROTKEYSIZE]; - } param; - u8 null_msg[AES_BLOCK_SIZE]; - u8 dest_buf[AES_BLOCK_SIZE]; - unsigned int k; - - switch (protkey->type) { - case PKEY_KEYTYPE_AES_128: - fc = CPACF_KMC_PAES_128; - break; - case PKEY_KEYTYPE_AES_192: - fc = CPACF_KMC_PAES_192; - break; - case PKEY_KEYTYPE_AES_256: - fc = CPACF_KMC_PAES_256; - break; - default: - DEBUG_ERR("%s unknown/unsupported keytype %d\n", __func__, - protkey->type); - return -EINVAL; } - - memset(null_msg, 0, sizeof(null_msg)); - - memset(param.iv, 0, sizeof(param.iv)); - memcpy(param.key, protkey->protkey, sizeof(param.key)); - - k = cpacf_kmc(fc | CPACF_ENCRYPT, ¶m, null_msg, dest_buf, - sizeof(null_msg)); - if (k != sizeof(null_msg)) { - DEBUG_ERR("%s protected key is not valid\n", __func__); - return -EKEYREJECTED; + if (!rc && kak.apqns) { + if (nr_apqns > kak.apqn_entries) { + kfree(apqns); + return -EINVAL; + } + len = nr_apqns * sizeof(struct pkey_apqn); + if (len) { + if (copy_to_user(kak.apqns, apqns, len)) { + kfree(apqns); + return -EFAULT; + } + } } + kak.apqn_entries = nr_apqns; + if (copy_to_user(uak, &kak, sizeof(kak))) + rc = -EFAULT; + kfree(apqns); - return 0; + return rc; } -EXPORT_SYMBOL(pkey_verifyprotkey); -/* - * Transform a non-CCA key token into a protected key - */ -static int pkey_nonccatok2pkey(const __u8 *key, __u32 keylen, - struct pkey_protkey *protkey) +static int pkey_ioctl_apqns4kt(struct pkey_apqns4keytype __user *uat) { - struct keytoken_header *hdr = (struct keytoken_header *)key; - struct protaeskeytoken *t; + struct pkey_apqn *apqns = NULL; + struct pkey_apqns4keytype kat; + size_t nr_apqns, len; + int rc; - switch (hdr->version) { - case TOKVER_PROTECTED_KEY: - if (keylen != sizeof(struct protaeskeytoken)) + if (copy_from_user(&kat, uat, sizeof(kat))) + return -EFAULT; + nr_apqns = kat.apqn_entries; + if (nr_apqns) { + apqns = kmalloc_array(nr_apqns, + sizeof(struct pkey_apqn), + GFP_KERNEL); + if (!apqns) + return -ENOMEM; + } + rc = pkey_handler_apqns_for_keytype(kat.type, + kat.cur_mkvp, kat.alt_mkvp, + kat.flags, apqns, &nr_apqns, 0); + pr_debug("apqns_for_keytype()=%d\n", rc); + if (rc && rc != -ENOSPC) { + kfree(apqns); + return rc; + } + if (!rc && kat.apqns) { + if (nr_apqns > kat.apqn_entries) { + kfree(apqns); return -EINVAL; - - t = (struct protaeskeytoken *)key; - protkey->len = t->len; - protkey->type = t->keytype; - memcpy(protkey->protkey, t->protkey, - sizeof(protkey->protkey)); - - return pkey_verifyprotkey(protkey); - default: - DEBUG_ERR("%s unknown/unsupported non-CCA token version %d\n", - __func__, hdr->version); - return -EINVAL; + } + len = nr_apqns * sizeof(struct pkey_apqn); + if (len) { + if (copy_to_user(kat.apqns, apqns, len)) { + kfree(apqns); + return -EFAULT; + } + } } + kat.apqn_entries = nr_apqns; + if (copy_to_user(uat, &kat, sizeof(kat))) + rc = -EFAULT; + kfree(apqns); + + return rc; } -/* - * Transform a CCA internal key token into a protected key - */ -static int pkey_ccainttok2pkey(const __u8 *key, __u32 keylen, - struct pkey_protkey *protkey) +static int pkey_ioctl_kblob2protk3(struct pkey_kblob2pkey3 __user *utp) { - struct keytoken_header *hdr = (struct keytoken_header *)key; + u32 protkeylen = PROTKEYBLOBBUFSIZE; + struct pkey_apqn *apqns = NULL; + struct pkey_kblob2pkey3 ktp; + u8 *kkey, *protkey; + int rc; - switch (hdr->version) { - case TOKVER_CCA_AES: - if (keylen != sizeof(struct secaeskeytoken)) + 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_sensitive(kkey); + return -ENOMEM; + } + rc = key2protkey(apqns, ktp.apqn_entries, kkey, ktp.keylen, + protkey, &protkeylen, &ktp.pkeytype, 0); + pr_debug("key2protkey()=%d\n", rc); + kfree(apqns); + kfree_sensitive(kkey); + if (rc) { + kfree_sensitive(protkey); + return rc; + } + if (ktp.pkey && ktp.pkeylen) { + if (protkeylen > ktp.pkeylen) { + kfree_sensitive(protkey); return -EINVAL; - - return pkey_skey2pkey((struct pkey_seckey *)key, - protkey); - default: - DEBUG_ERR("%s unknown/unsupported CCA internal token version %d\n", - __func__, hdr->version); - return -EINVAL; + } + if (copy_to_user(ktp.pkey, protkey, protkeylen)) { + kfree_sensitive(protkey); + return -EFAULT; + } } -} + kfree_sensitive(protkey); + ktp.pkeylen = protkeylen; + if (copy_to_user(utp, &ktp, sizeof(ktp))) + return -EFAULT; -/* - * Transform a key blob (of any type) into a protected key - */ -int pkey_keyblob2pkey(const __u8 *key, __u32 keylen, - struct pkey_protkey *protkey) -{ - struct keytoken_header *hdr = (struct keytoken_header *)key; - - if (keylen < sizeof(struct keytoken_header)) - return -EINVAL; - - switch (hdr->type) { - case TOKTYPE_NON_CCA: - return pkey_nonccatok2pkey(key, keylen, protkey); - case TOKTYPE_CCA_INTERNAL: - return pkey_ccainttok2pkey(key, keylen, protkey); - default: - DEBUG_ERR("%s unknown/unsupported blob type %d\n", __func__, - hdr->type); - return -EINVAL; - } + return 0; } -EXPORT_SYMBOL(pkey_keyblob2pkey); - -/* - * File io functions - */ static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) @@ -1266,164 +712,57 @@ static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd, int rc; switch (cmd) { - case PKEY_GENSECK: { - struct pkey_genseck __user *ugs = (void __user *) arg; - struct pkey_genseck kgs; - - if (copy_from_user(&kgs, ugs, sizeof(kgs))) - return -EFAULT; - rc = pkey_genseckey(kgs.cardnr, kgs.domain, - kgs.keytype, &kgs.seckey); - DEBUG_DBG("%s pkey_genseckey()=%d\n", __func__, rc); - if (rc) - break; - if (copy_to_user(ugs, &kgs, sizeof(kgs))) - return -EFAULT; + case PKEY_GENSECK: + rc = pkey_ioctl_genseck((struct pkey_genseck __user *)arg); break; - } - case PKEY_CLR2SECK: { - struct pkey_clr2seck __user *ucs = (void __user *) arg; - struct pkey_clr2seck kcs; - - if (copy_from_user(&kcs, ucs, sizeof(kcs))) - return -EFAULT; - rc = pkey_clr2seckey(kcs.cardnr, kcs.domain, kcs.keytype, - &kcs.clrkey, &kcs.seckey); - DEBUG_DBG("%s pkey_clr2seckey()=%d\n", __func__, rc); - if (rc) - break; - if (copy_to_user(ucs, &kcs, sizeof(kcs))) - return -EFAULT; - memzero_explicit(&kcs, sizeof(kcs)); + case PKEY_CLR2SECK: + rc = pkey_ioctl_clr2seck((struct pkey_clr2seck __user *)arg); break; - } - case PKEY_SEC2PROTK: { - struct pkey_sec2protk __user *usp = (void __user *) arg; - struct pkey_sec2protk ksp; - - if (copy_from_user(&ksp, usp, sizeof(ksp))) - return -EFAULT; - rc = pkey_sec2protkey(ksp.cardnr, ksp.domain, - &ksp.seckey, &ksp.protkey); - DEBUG_DBG("%s pkey_sec2protkey()=%d\n", __func__, rc); - if (rc) - break; - if (copy_to_user(usp, &ksp, sizeof(ksp))) - return -EFAULT; + case PKEY_SEC2PROTK: + rc = pkey_ioctl_sec2protk((struct pkey_sec2protk __user *)arg); break; - } - case PKEY_CLR2PROTK: { - struct pkey_clr2protk __user *ucp = (void __user *) arg; - struct pkey_clr2protk kcp; - - if (copy_from_user(&kcp, ucp, sizeof(kcp))) - return -EFAULT; - rc = pkey_clr2protkey(kcp.keytype, - &kcp.clrkey, &kcp.protkey); - DEBUG_DBG("%s pkey_clr2protkey()=%d\n", __func__, rc); - if (rc) - break; - if (copy_to_user(ucp, &kcp, sizeof(kcp))) - return -EFAULT; - memzero_explicit(&kcp, sizeof(kcp)); + case PKEY_CLR2PROTK: + rc = pkey_ioctl_clr2protk((struct pkey_clr2protk __user *)arg); break; - } - case PKEY_FINDCARD: { - struct pkey_findcard __user *ufc = (void __user *) arg; - struct pkey_findcard kfc; - - if (copy_from_user(&kfc, ufc, sizeof(kfc))) - return -EFAULT; - rc = pkey_findcard(&kfc.seckey, - &kfc.cardnr, &kfc.domain, 1); - DEBUG_DBG("%s pkey_findcard()=%d\n", __func__, rc); - if (rc) - break; - if (copy_to_user(ufc, &kfc, sizeof(kfc))) - return -EFAULT; + case PKEY_FINDCARD: + rc = pkey_ioctl_findcard((struct pkey_findcard __user *)arg); break; - } - case PKEY_SKEY2PKEY: { - struct pkey_skey2pkey __user *usp = (void __user *) arg; - struct pkey_skey2pkey ksp; - - if (copy_from_user(&ksp, usp, sizeof(ksp))) - return -EFAULT; - rc = pkey_skey2pkey(&ksp.seckey, &ksp.protkey); - DEBUG_DBG("%s pkey_skey2pkey()=%d\n", __func__, rc); - if (rc) - break; - if (copy_to_user(usp, &ksp, sizeof(ksp))) - return -EFAULT; + case PKEY_SKEY2PKEY: + rc = pkey_ioctl_skey2pkey((struct pkey_skey2pkey __user *)arg); break; - } - case PKEY_VERIFYKEY: { - struct pkey_verifykey __user *uvk = (void __user *) arg; - struct pkey_verifykey kvk; - - if (copy_from_user(&kvk, uvk, sizeof(kvk))) - return -EFAULT; - rc = pkey_verifykey(&kvk.seckey, &kvk.cardnr, &kvk.domain, - &kvk.keysize, &kvk.attributes); - DEBUG_DBG("%s pkey_verifykey()=%d\n", __func__, rc); - if (rc) - break; - if (copy_to_user(uvk, &kvk, sizeof(kvk))) - return -EFAULT; + case PKEY_VERIFYKEY: + rc = pkey_ioctl_verifykey((struct pkey_verifykey __user *)arg); break; - } - case PKEY_GENPROTK: { - struct pkey_genprotk __user *ugp = (void __user *) arg; - struct pkey_genprotk kgp; - - if (copy_from_user(&kgp, ugp, sizeof(kgp))) - return -EFAULT; - rc = pkey_genprotkey(kgp.keytype, &kgp.protkey); - DEBUG_DBG("%s pkey_genprotkey()=%d\n", __func__, rc); - if (rc) - break; - if (copy_to_user(ugp, &kgp, sizeof(kgp))) - return -EFAULT; + case PKEY_GENPROTK: + rc = pkey_ioctl_genprotk((struct pkey_genprotk __user *)arg); break; - } - case PKEY_VERIFYPROTK: { - struct pkey_verifyprotk __user *uvp = (void __user *) arg; - struct pkey_verifyprotk kvp; - - if (copy_from_user(&kvp, uvp, sizeof(kvp))) - return -EFAULT; - rc = pkey_verifyprotkey(&kvp.protkey); - DEBUG_DBG("%s pkey_verifyprotkey()=%d\n", __func__, rc); + case PKEY_VERIFYPROTK: + rc = pkey_ioctl_verifyprotk((struct pkey_verifyprotk __user *)arg); break; - } - case PKEY_KBLOB2PROTK: { - struct pkey_kblob2pkey __user *utp = (void __user *) arg; - struct pkey_kblob2pkey ktp; - __u8 __user *ukey; - __u8 *kkey; - - if (copy_from_user(&ktp, utp, sizeof(ktp))) - return -EFAULT; - if (ktp.keylen < MINKEYBLOBSIZE || - ktp.keylen > MAXKEYBLOBSIZE) - return -EINVAL; - ukey = ktp.key; - kkey = kmalloc(ktp.keylen, GFP_KERNEL); - if (kkey == NULL) - return -ENOMEM; - if (copy_from_user(kkey, ukey, ktp.keylen)) { - kfree(kkey); - return -EFAULT; - } - rc = pkey_keyblob2pkey(kkey, ktp.keylen, &ktp.protkey); - DEBUG_DBG("%s pkey_keyblob2pkey()=%d\n", __func__, rc); - kfree(kkey); - if (rc) - break; - if (copy_to_user(utp, &ktp, sizeof(ktp))) - return -EFAULT; + case PKEY_KBLOB2PROTK: + rc = pkey_ioctl_kblob2protk((struct pkey_kblob2pkey __user *)arg); + break; + case PKEY_GENSECK2: + rc = pkey_ioctl_genseck2((struct pkey_genseck2 __user *)arg); + break; + case PKEY_CLR2SECK2: + rc = pkey_ioctl_clr2seck2((struct pkey_clr2seck2 __user *)arg); + break; + case PKEY_VERIFYKEY2: + rc = pkey_ioctl_verifykey2((struct pkey_verifykey2 __user *)arg); + break; + case PKEY_KBLOB2PROTK2: + rc = pkey_ioctl_kblob2protk2((struct pkey_kblob2pkey2 __user *)arg); + break; + case PKEY_APQNS4K: + rc = pkey_ioctl_apqns4k((struct pkey_apqns4key __user *)arg); + break; + case PKEY_APQNS4KT: + rc = pkey_ioctl_apqns4kt((struct pkey_apqns4keytype __user *)arg); + break; + case PKEY_KBLOB2PROTK3: + rc = pkey_ioctl_kblob2protk3((struct pkey_kblob2pkey3 __user *)arg); break; - } default: /* unknown/unsupported ioctl cmd */ return -ENOTTY; @@ -1433,242 +772,12 @@ static long pkey_unlocked_ioctl(struct file *filp, unsigned int cmd, } /* - * Sysfs and file io operations - */ - -/* - * Sysfs attribute read function for all protected key binary attributes. - * The implementation can not deal with partial reads, because a new random - * protected key blob is generated with each read. In case of partial reads - * (i.e. off != 0 or count < key blob size) -EINVAL is returned. + * File io operations */ -static ssize_t pkey_protkey_aes_attr_read(u32 keytype, bool is_xts, char *buf, - loff_t off, size_t count) -{ - struct protaeskeytoken protkeytoken; - struct pkey_protkey protkey; - int rc; - - if (off != 0 || count < sizeof(protkeytoken)) - return -EINVAL; - if (is_xts) - if (count < 2 * sizeof(protkeytoken)) - return -EINVAL; - - memset(&protkeytoken, 0, sizeof(protkeytoken)); - protkeytoken.type = TOKTYPE_NON_CCA; - protkeytoken.version = TOKVER_PROTECTED_KEY; - protkeytoken.keytype = keytype; - - rc = pkey_genprotkey(protkeytoken.keytype, &protkey); - if (rc) - return rc; - - protkeytoken.len = protkey.len; - memcpy(&protkeytoken.protkey, &protkey.protkey, protkey.len); - - memcpy(buf, &protkeytoken, sizeof(protkeytoken)); - - if (is_xts) { - rc = pkey_genprotkey(protkeytoken.keytype, &protkey); - if (rc) - return rc; - - protkeytoken.len = protkey.len; - memcpy(&protkeytoken.protkey, &protkey.protkey, protkey.len); - - memcpy(buf + sizeof(protkeytoken), &protkeytoken, - sizeof(protkeytoken)); - - return 2 * sizeof(protkeytoken); - } - - return sizeof(protkeytoken); -} - -static ssize_t protkey_aes_128_read(struct file *filp, - struct kobject *kobj, - struct bin_attribute *attr, - char *buf, loff_t off, - size_t count) -{ - return pkey_protkey_aes_attr_read(PKEY_KEYTYPE_AES_128, false, buf, - off, count); -} - -static ssize_t protkey_aes_192_read(struct file *filp, - struct kobject *kobj, - struct bin_attribute *attr, - char *buf, loff_t off, - size_t count) -{ - return pkey_protkey_aes_attr_read(PKEY_KEYTYPE_AES_192, false, buf, - off, count); -} - -static ssize_t protkey_aes_256_read(struct file *filp, - struct kobject *kobj, - struct bin_attribute *attr, - char *buf, loff_t off, - size_t count) -{ - return pkey_protkey_aes_attr_read(PKEY_KEYTYPE_AES_256, false, buf, - off, count); -} - -static ssize_t protkey_aes_128_xts_read(struct file *filp, - struct kobject *kobj, - struct bin_attribute *attr, - char *buf, loff_t off, - size_t count) -{ - return pkey_protkey_aes_attr_read(PKEY_KEYTYPE_AES_128, true, buf, - off, count); -} - -static ssize_t protkey_aes_256_xts_read(struct file *filp, - struct kobject *kobj, - struct bin_attribute *attr, - char *buf, loff_t off, - size_t count) -{ - return pkey_protkey_aes_attr_read(PKEY_KEYTYPE_AES_256, true, buf, - off, count); -} - -static BIN_ATTR_RO(protkey_aes_128, sizeof(struct protaeskeytoken)); -static BIN_ATTR_RO(protkey_aes_192, sizeof(struct protaeskeytoken)); -static BIN_ATTR_RO(protkey_aes_256, sizeof(struct protaeskeytoken)); -static BIN_ATTR_RO(protkey_aes_128_xts, 2 * sizeof(struct protaeskeytoken)); -static BIN_ATTR_RO(protkey_aes_256_xts, 2 * sizeof(struct protaeskeytoken)); - -static struct bin_attribute *protkey_attrs[] = { - &bin_attr_protkey_aes_128, - &bin_attr_protkey_aes_192, - &bin_attr_protkey_aes_256, - &bin_attr_protkey_aes_128_xts, - &bin_attr_protkey_aes_256_xts, - NULL -}; - -static struct attribute_group protkey_attr_group = { - .name = "protkey", - .bin_attrs = protkey_attrs, -}; - -/* - * Sysfs attribute read function for all secure key ccadata binary attributes. - * The implementation can not deal with partial reads, because a new random - * protected key blob is generated with each read. In case of partial reads - * (i.e. off != 0 or count < key blob size) -EINVAL is returned. - */ -static ssize_t pkey_ccadata_aes_attr_read(u32 keytype, bool is_xts, char *buf, - loff_t off, size_t count) -{ - int rc; - - if (off != 0 || count < sizeof(struct secaeskeytoken)) - return -EINVAL; - if (is_xts) - if (count < 2 * sizeof(struct secaeskeytoken)) - return -EINVAL; - - rc = pkey_genseckey(-1, -1, keytype, (struct pkey_seckey *)buf); - if (rc) - return rc; - - if (is_xts) { - buf += sizeof(struct pkey_seckey); - rc = pkey_genseckey(-1, -1, keytype, (struct pkey_seckey *)buf); - if (rc) - return rc; - - return 2 * sizeof(struct secaeskeytoken); - } - - return sizeof(struct secaeskeytoken); -} - -static ssize_t ccadata_aes_128_read(struct file *filp, - struct kobject *kobj, - struct bin_attribute *attr, - char *buf, loff_t off, - size_t count) -{ - return pkey_ccadata_aes_attr_read(PKEY_KEYTYPE_AES_128, false, buf, - off, count); -} - -static ssize_t ccadata_aes_192_read(struct file *filp, - struct kobject *kobj, - struct bin_attribute *attr, - char *buf, loff_t off, - size_t count) -{ - return pkey_ccadata_aes_attr_read(PKEY_KEYTYPE_AES_192, false, buf, - off, count); -} - -static ssize_t ccadata_aes_256_read(struct file *filp, - struct kobject *kobj, - struct bin_attribute *attr, - char *buf, loff_t off, - size_t count) -{ - return pkey_ccadata_aes_attr_read(PKEY_KEYTYPE_AES_256, false, buf, - off, count); -} - -static ssize_t ccadata_aes_128_xts_read(struct file *filp, - struct kobject *kobj, - struct bin_attribute *attr, - char *buf, loff_t off, - size_t count) -{ - return pkey_ccadata_aes_attr_read(PKEY_KEYTYPE_AES_128, true, buf, - off, count); -} - -static ssize_t ccadata_aes_256_xts_read(struct file *filp, - struct kobject *kobj, - struct bin_attribute *attr, - char *buf, loff_t off, - size_t count) -{ - return pkey_ccadata_aes_attr_read(PKEY_KEYTYPE_AES_256, true, buf, - off, count); -} - -static BIN_ATTR_RO(ccadata_aes_128, sizeof(struct secaeskeytoken)); -static BIN_ATTR_RO(ccadata_aes_192, sizeof(struct secaeskeytoken)); -static BIN_ATTR_RO(ccadata_aes_256, sizeof(struct secaeskeytoken)); -static BIN_ATTR_RO(ccadata_aes_128_xts, 2 * sizeof(struct secaeskeytoken)); -static BIN_ATTR_RO(ccadata_aes_256_xts, 2 * sizeof(struct secaeskeytoken)); - -static struct bin_attribute *ccadata_attrs[] = { - &bin_attr_ccadata_aes_128, - &bin_attr_ccadata_aes_192, - &bin_attr_ccadata_aes_256, - &bin_attr_ccadata_aes_128_xts, - &bin_attr_ccadata_aes_256_xts, - NULL -}; - -static struct attribute_group ccadata_attr_group = { - .name = "ccadata", - .bin_attrs = ccadata_attrs, -}; - -static const struct attribute_group *pkey_attr_groups[] = { - &protkey_attr_group, - &ccadata_attr_group, - NULL, -}; static const struct file_operations pkey_fops = { .owner = THIS_MODULE, .open = nonseekable_open, - .llseek = no_llseek, .unlocked_ioctl = pkey_unlocked_ioctl, }; @@ -1680,44 +789,13 @@ static struct miscdevice pkey_dev = { .groups = pkey_attr_groups, }; -/* - * Module init - */ -static int __init pkey_init(void) +int __init pkey_api_init(void) { - cpacf_mask_t kmc_functions; - - /* - * The pckmo instruction should be available - even if we don't - * actually invoke it. This instruction comes with MSA 3 which - * is also the minimum level for the kmc instructions which - * are able to work with protected keys. - */ - if (!cpacf_query(CPACF_PCKMO, &pckmo_functions)) - return -EOPNOTSUPP; - - /* check for kmc instructions available */ - if (!cpacf_query(CPACF_KMC, &kmc_functions)) - return -EOPNOTSUPP; - 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)) - return -EOPNOTSUPP; - - pkey_debug_init(); - + /* register as a misc device */ return misc_register(&pkey_dev); } -/* - * Module exit - */ -static void __exit pkey_exit(void) +void __exit pkey_api_exit(void) { misc_deregister(&pkey_dev); - mkvp_cache_free(); - pkey_debug_exit(); } - -module_cpu_feature_match(MSA, pkey_init); -module_exit(pkey_exit); |