diff options
Diffstat (limited to 'drivers/s390/crypto/zcrypt_ccamisc.c')
| -rw-r--r-- | drivers/s390/crypto/zcrypt_ccamisc.c | 1989 |
1 files changed, 1989 insertions, 0 deletions
diff --git a/drivers/s390/crypto/zcrypt_ccamisc.c b/drivers/s390/crypto/zcrypt_ccamisc.c new file mode 100644 index 000000000..60ba20a13 --- /dev/null +++ b/drivers/s390/crypto/zcrypt_ccamisc.c @@ -0,0 +1,1989 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright IBM Corp. 2019 + * Author(s): Harald Freudenberger <freude@linux.ibm.com> + * Ingo Franzki <ifranzki@linux.ibm.com> + * + * Collection of CCA misc functions used by zcrypt and pkey + */ + +#define KMSG_COMPONENT "zcrypt" +#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/random.h> +#include <asm/zcrypt.h> +#include <asm/pkey.h> + +#include "ap_bus.h" +#include "zcrypt_api.h" +#include "zcrypt_debug.h" +#include "zcrypt_msgtype6.h" +#include "zcrypt_ccamisc.h" + +#define DEBUG_DBG(...) ZCRYPT_DBF(DBF_DEBUG, ##__VA_ARGS__) +#define DEBUG_INFO(...) ZCRYPT_DBF(DBF_INFO, ##__VA_ARGS__) +#define DEBUG_WARN(...) ZCRYPT_DBF(DBF_WARN, ##__VA_ARGS__) +#define DEBUG_ERR(...) ZCRYPT_DBF(DBF_ERR, ##__VA_ARGS__) + +/* Size of parameter block used for all cca requests/replies */ +#define PARMBSIZE 512 + +/* Size of vardata block used for some of the cca requests/replies */ +#define VARDATASIZE 4096 + +struct cca_info_list_entry { + struct list_head list; + u16 cardnr; + u16 domain; + struct cca_info info; +}; + +/* a list with cca_info_list_entry entries */ +static LIST_HEAD(cca_info_list); +static DEFINE_SPINLOCK(cca_info_list_lock); + +/* + * Simple check if the token is a valid CCA secure AES data key + * token. If keybitsize is given, the bitsize of the key is + * also checked. Returns 0 on success or errno value on failure. + */ +int cca_check_secaeskeytoken(debug_info_t *dbg, int dbflvl, + const u8 *token, int keybitsize) +{ + struct secaeskeytoken *t = (struct secaeskeytoken *)token; + +#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__) + + if (t->type != TOKTYPE_CCA_INTERNAL) { + if (dbg) + DBF("%s token check failed, type 0x%02x != 0x%02x\n", + __func__, (int)t->type, TOKTYPE_CCA_INTERNAL); + return -EINVAL; + } + if (t->version != TOKVER_CCA_AES) { + if (dbg) + DBF("%s token check failed, version 0x%02x != 0x%02x\n", + __func__, (int)t->version, TOKVER_CCA_AES); + return -EINVAL; + } + if (keybitsize > 0 && t->bitsize != keybitsize) { + if (dbg) + DBF("%s token check failed, bitsize %d != %d\n", + __func__, (int)t->bitsize, keybitsize); + return -EINVAL; + } + +#undef DBF + + return 0; +} +EXPORT_SYMBOL(cca_check_secaeskeytoken); + +/* + * Simple check if the token is a valid CCA secure AES cipher key + * token. If keybitsize is given, the bitsize of the key is + * also checked. If checkcpacfexport is enabled, the key is also + * checked for the export flag to allow CPACF export. + * Returns 0 on success or errno value on failure. + */ +int cca_check_secaescipherkey(debug_info_t *dbg, int dbflvl, + const u8 *token, int keybitsize, + int checkcpacfexport) +{ + struct cipherkeytoken *t = (struct cipherkeytoken *)token; + bool keybitsizeok = true; + +#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__) + + if (t->type != TOKTYPE_CCA_INTERNAL) { + if (dbg) + DBF("%s token check failed, type 0x%02x != 0x%02x\n", + __func__, (int)t->type, TOKTYPE_CCA_INTERNAL); + return -EINVAL; + } + if (t->version != TOKVER_CCA_VLSC) { + if (dbg) + DBF("%s token check failed, version 0x%02x != 0x%02x\n", + __func__, (int)t->version, TOKVER_CCA_VLSC); + return -EINVAL; + } + if (t->algtype != 0x02) { + if (dbg) + DBF("%s token check failed, algtype 0x%02x != 0x02\n", + __func__, (int)t->algtype); + return -EINVAL; + } + if (t->keytype != 0x0001) { + if (dbg) + DBF("%s token check failed, keytype 0x%04x != 0x0001\n", + __func__, (int)t->keytype); + return -EINVAL; + } + if (t->plfver != 0x00 && t->plfver != 0x01) { + if (dbg) + DBF("%s token check failed, unknown plfver 0x%02x\n", + __func__, (int)t->plfver); + return -EINVAL; + } + if (t->wpllen != 512 && t->wpllen != 576 && t->wpllen != 640) { + if (dbg) + DBF("%s token check failed, unknown wpllen %d\n", + __func__, (int)t->wpllen); + return -EINVAL; + } + if (keybitsize > 0) { + switch (keybitsize) { + case 128: + if (t->wpllen != (t->plfver ? 640 : 512)) + keybitsizeok = false; + break; + case 192: + if (t->wpllen != (t->plfver ? 640 : 576)) + keybitsizeok = false; + break; + case 256: + if (t->wpllen != 640) + keybitsizeok = false; + break; + default: + keybitsizeok = false; + break; + } + if (!keybitsizeok) { + if (dbg) + DBF("%s token check failed, bitsize %d\n", + __func__, keybitsize); + return -EINVAL; + } + } + if (checkcpacfexport && !(t->kmf1 & KMF1_XPRT_CPAC)) { + if (dbg) + DBF("%s token check failed, XPRT_CPAC bit is 0\n", + __func__); + return -EINVAL; + } + +#undef DBF + + return 0; +} +EXPORT_SYMBOL(cca_check_secaescipherkey); + +/* + * Simple check if the token is a valid CCA secure ECC private + * key token. Returns 0 on success or errno value on failure. + */ +int cca_check_sececckeytoken(debug_info_t *dbg, int dbflvl, + const u8 *token, size_t keysize, + int checkcpacfexport) +{ + struct eccprivkeytoken *t = (struct eccprivkeytoken *)token; + +#define DBF(...) debug_sprintf_event(dbg, dbflvl, ##__VA_ARGS__) + + if (t->type != TOKTYPE_CCA_INTERNAL_PKA) { + if (dbg) + DBF("%s token check failed, type 0x%02x != 0x%02x\n", + __func__, (int)t->type, TOKTYPE_CCA_INTERNAL_PKA); + return -EINVAL; + } + if (t->len > keysize) { + if (dbg) + DBF("%s token check failed, len %d > keysize %zu\n", + __func__, (int)t->len, keysize); + return -EINVAL; + } + if (t->secid != 0x20) { + if (dbg) + DBF("%s token check failed, secid 0x%02x != 0x20\n", + __func__, (int)t->secid); + return -EINVAL; + } + if (checkcpacfexport && !(t->kutc & 0x01)) { + if (dbg) + DBF("%s token check failed, XPRTCPAC bit is 0\n", + __func__); + return -EINVAL; + } + +#undef DBF + + return 0; +} +EXPORT_SYMBOL(cca_check_sececckeytoken); + +/* + * Allocate consecutive memory for request CPRB, request param + * block, reply CPRB and reply param block and fill in values + * for the common fields. Returns 0 on success or errno value + * on failure. + */ +static int alloc_and_prep_cprbmem(size_t paramblen, + u8 **p_cprb_mem, + struct CPRBX **p_req_cprb, + struct CPRBX **p_rep_cprb) +{ + u8 *cprbmem; + size_t cprbplusparamblen = sizeof(struct CPRBX) + paramblen; + struct CPRBX *preqcblk, *prepcblk; + + /* + * allocate consecutive memory for request CPRB, request param + * block, reply CPRB and reply param block + */ + cprbmem = kcalloc(2, cprbplusparamblen, GFP_KERNEL); + if (!cprbmem) + return -ENOMEM; + + preqcblk = (struct CPRBX *)cprbmem; + prepcblk = (struct CPRBX *)(cprbmem + cprbplusparamblen); + + /* fill request cprb struct */ + preqcblk->cprb_len = sizeof(struct CPRBX); + preqcblk->cprb_ver_id = 0x02; + memcpy(preqcblk->func_id, "T2", 2); + preqcblk->rpl_msgbl = cprbplusparamblen; + if (paramblen) { + preqcblk->req_parmb = + ((u8 __user *)preqcblk) + sizeof(struct CPRBX); + preqcblk->rpl_parmb = + ((u8 __user *)prepcblk) + sizeof(struct CPRBX); + } + + *p_cprb_mem = cprbmem; + *p_req_cprb = preqcblk; + *p_rep_cprb = prepcblk; + + return 0; +} + +/* + * Free the cprb memory allocated with the function above. + * If the scrub value is not zero, the memory is filled + * with zeros before freeing (useful if there was some + * clear key material in there). + */ +static void free_cprbmem(void *mem, size_t paramblen, int scrub) +{ + if (scrub) + memzero_explicit(mem, 2 * (sizeof(struct CPRBX) + paramblen)); + kfree(mem); +} + +/* + * Helper function to prepare the xcrb struct + */ +static inline void prep_xcrb(struct ica_xcRB *pxcrb, + u16 cardnr, + struct CPRBX *preqcblk, + struct CPRBX *prepcblk) +{ + memset(pxcrb, 0, sizeof(*pxcrb)); + pxcrb->agent_ID = 0x4341; /* 'CA' */ + pxcrb->user_defined = (cardnr == 0xFFFF ? AUTOSELECT : cardnr); + pxcrb->request_control_blk_length = + preqcblk->cprb_len + preqcblk->req_parml; + pxcrb->request_control_blk_addr = (void __user *)preqcblk; + pxcrb->reply_control_blk_length = preqcblk->rpl_msgbl; + pxcrb->reply_control_blk_addr = (void __user *)prepcblk; +} + +/* + * Generate (random) CCA AES DATA secure key. + */ +int cca_genseckey(u16 cardnr, u16 domain, + u32 keybitsize, u8 *seckey) +{ + int i, rc, keysize; + int seckeysize; + u8 *mem, *ptr; + struct CPRBX *preqcblk, *prepcblk; + struct ica_xcRB xcrb; + struct kgreqparm { + u8 subfunc_code[2]; + u16 rule_array_len; + struct lv1 { + u16 len; + char key_form[8]; + char key_length[8]; + char key_type1[8]; + char key_type2[8]; + } lv1; + struct lv2 { + u16 len; + struct keyid { + u16 len; + u16 attr; + u8 data[SECKEYBLOBSIZE]; + } keyid[6]; + } lv2; + } __packed * preqparm; + struct kgrepparm { + u8 subfunc_code[2]; + u16 rule_array_len; + struct lv3 { + u16 len; + u16 keyblocklen; + struct { + u16 toklen; + u16 tokattr; + u8 tok[]; + /* ... some more data ... */ + } keyblock; + } lv3; + } __packed * prepparm; + + /* get already prepared memory for 2 cprbs with param block each */ + rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk); + if (rc) + return rc; + + /* fill request cprb struct */ + preqcblk->domain = domain; + + /* fill request cprb param block with KG request */ + preqparm = (struct kgreqparm __force *)preqcblk->req_parmb; + memcpy(preqparm->subfunc_code, "KG", 2); + preqparm->rule_array_len = sizeof(preqparm->rule_array_len); + preqparm->lv1.len = sizeof(struct lv1); + memcpy(preqparm->lv1.key_form, "OP ", 8); + switch (keybitsize) { + case PKEY_SIZE_AES_128: + case PKEY_KEYTYPE_AES_128: /* older ioctls used this */ + keysize = 16; + memcpy(preqparm->lv1.key_length, "KEYLN16 ", 8); + break; + case PKEY_SIZE_AES_192: + case PKEY_KEYTYPE_AES_192: /* older ioctls used this */ + keysize = 24; + memcpy(preqparm->lv1.key_length, "KEYLN24 ", 8); + break; + case PKEY_SIZE_AES_256: + case PKEY_KEYTYPE_AES_256: /* older ioctls used this */ + keysize = 32; + memcpy(preqparm->lv1.key_length, "KEYLN32 ", 8); + break; + default: + DEBUG_ERR("%s unknown/unsupported keybitsize %d\n", + __func__, keybitsize); + rc = -EINVAL; + goto out; + } + memcpy(preqparm->lv1.key_type1, "AESDATA ", 8); + preqparm->lv2.len = sizeof(struct lv2); + for (i = 0; i < 6; i++) { + preqparm->lv2.keyid[i].len = sizeof(struct keyid); + preqparm->lv2.keyid[i].attr = (i == 2 ? 0x30 : 0x10); + } + preqcblk->req_parml = sizeof(struct kgreqparm); + + /* fill xcrb struct */ + prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk); + + /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */ + rc = zcrypt_send_cprb(&xcrb); + if (rc) { + DEBUG_ERR("%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, errno %d\n", + __func__, (int)cardnr, (int)domain, rc); + goto out; + } + + /* check response returncode and reasoncode */ + if (prepcblk->ccp_rtcode != 0) { + DEBUG_ERR("%s secure key generate failure, card response %d/%d\n", + __func__, + (int)prepcblk->ccp_rtcode, + (int)prepcblk->ccp_rscode); + rc = -EIO; + goto out; + } + + /* process response cprb param block */ + ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX); + prepcblk->rpl_parmb = (u8 __user *)ptr; + prepparm = (struct kgrepparm *)ptr; + + /* check length of the returned secure key token */ + seckeysize = prepparm->lv3.keyblock.toklen + - sizeof(prepparm->lv3.keyblock.toklen) + - sizeof(prepparm->lv3.keyblock.tokattr); + if (seckeysize != SECKEYBLOBSIZE) { + DEBUG_ERR("%s secure token size mismatch %d != %d bytes\n", + __func__, seckeysize, SECKEYBLOBSIZE); + rc = -EIO; + goto out; + } + + /* check secure key token */ + rc = cca_check_secaeskeytoken(zcrypt_dbf_info, DBF_ERR, + prepparm->lv3.keyblock.tok, 8 * keysize); + if (rc) { + rc = -EIO; + goto out; + } + + /* copy the generated secure key token */ + memcpy(seckey, prepparm->lv3.keyblock.tok, SECKEYBLOBSIZE); + +out: + free_cprbmem(mem, PARMBSIZE, 0); + return rc; +} +EXPORT_SYMBOL(cca_genseckey); + +/* + * Generate an CCA AES DATA secure key with given key value. + */ +int cca_clr2seckey(u16 cardnr, u16 domain, u32 keybitsize, + const u8 *clrkey, u8 *seckey) +{ + int rc, keysize, seckeysize; + u8 *mem, *ptr; + struct CPRBX *preqcblk, *prepcblk; + struct ica_xcRB xcrb; + struct cmreqparm { + u8 subfunc_code[2]; + u16 rule_array_len; + char rule_array[8]; + struct lv1 { + u16 len; + u8 clrkey[0]; + } lv1; + struct lv2 { + u16 len; + struct keyid { + u16 len; + u16 attr; + u8 data[SECKEYBLOBSIZE]; + } keyid; + } lv2; + } __packed * preqparm; + struct lv2 *plv2; + struct cmrepparm { + u8 subfunc_code[2]; + u16 rule_array_len; + struct lv3 { + u16 len; + u16 keyblocklen; + struct { + u16 toklen; + u16 tokattr; + u8 tok[]; + /* ... some more data ... */ + } keyblock; + } lv3; + } __packed * prepparm; + + /* get already prepared memory for 2 cprbs with param block each */ + rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk); + if (rc) + return rc; + + /* fill request cprb struct */ + preqcblk->domain = domain; + + /* fill request cprb param block with CM request */ + preqparm = (struct cmreqparm __force *)preqcblk->req_parmb; + memcpy(preqparm->subfunc_code, "CM", 2); + memcpy(preqparm->rule_array, "AES ", 8); + preqparm->rule_array_len = + sizeof(preqparm->rule_array_len) + sizeof(preqparm->rule_array); + switch (keybitsize) { + case PKEY_SIZE_AES_128: + case PKEY_KEYTYPE_AES_128: /* older ioctls used this */ + keysize = 16; + break; + case PKEY_SIZE_AES_192: + case PKEY_KEYTYPE_AES_192: /* older ioctls used this */ + keysize = 24; + break; + case PKEY_SIZE_AES_256: + case PKEY_KEYTYPE_AES_256: /* older ioctls used this */ + keysize = 32; + break; + default: + DEBUG_ERR("%s unknown/unsupported keybitsize %d\n", + __func__, keybitsize); + rc = -EINVAL; + goto out; + } + preqparm->lv1.len = sizeof(struct lv1) + keysize; + memcpy(preqparm->lv1.clrkey, clrkey, keysize); + plv2 = (struct lv2 *)(((u8 *)&preqparm->lv2) + keysize); + plv2->len = sizeof(struct lv2); + plv2->keyid.len = sizeof(struct keyid); + plv2->keyid.attr = 0x30; + preqcblk->req_parml = sizeof(struct cmreqparm) + keysize; + + /* fill xcrb struct */ + prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk); + + /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */ + rc = zcrypt_send_cprb(&xcrb); + if (rc) { + DEBUG_ERR("%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, rc=%d\n", + __func__, (int)cardnr, (int)domain, rc); + goto out; + } + + /* check response returncode and reasoncode */ + if (prepcblk->ccp_rtcode != 0) { + DEBUG_ERR("%s clear key import failure, card response %d/%d\n", + __func__, + (int)prepcblk->ccp_rtcode, + (int)prepcblk->ccp_rscode); + rc = -EIO; + goto out; + } + + /* process response cprb param block */ + ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX); + prepcblk->rpl_parmb = (u8 __user *)ptr; + prepparm = (struct cmrepparm *)ptr; + + /* check length of the returned secure key token */ + seckeysize = prepparm->lv3.keyblock.toklen + - sizeof(prepparm->lv3.keyblock.toklen) + - sizeof(prepparm->lv3.keyblock.tokattr); + if (seckeysize != SECKEYBLOBSIZE) { + DEBUG_ERR("%s secure token size mismatch %d != %d bytes\n", + __func__, seckeysize, SECKEYBLOBSIZE); + rc = -EIO; + goto out; + } + + /* check secure key token */ + rc = cca_check_secaeskeytoken(zcrypt_dbf_info, DBF_ERR, + prepparm->lv3.keyblock.tok, 8 * keysize); + if (rc) { + rc = -EIO; + goto out; + } + + /* copy the generated secure key token */ + if (seckey) + memcpy(seckey, prepparm->lv3.keyblock.tok, SECKEYBLOBSIZE); + +out: + free_cprbmem(mem, PARMBSIZE, 1); + return rc; +} +EXPORT_SYMBOL(cca_clr2seckey); + +/* + * Derive proteced key from an CCA AES DATA secure key. + */ +int cca_sec2protkey(u16 cardnr, u16 domain, + const u8 *seckey, u8 *protkey, u32 *protkeylen, + u32 *protkeytype) +{ + int rc; + u8 *mem, *ptr; + struct CPRBX *preqcblk, *prepcblk; + struct ica_xcRB xcrb; + struct uskreqparm { + u8 subfunc_code[2]; + u16 rule_array_len; + struct lv1 { + u16 len; + u16 attr_len; + u16 attr_flags; + } lv1; + struct lv2 { + u16 len; + u16 attr_len; + u16 attr_flags; + u8 token[]; /* cca secure key token */ + } lv2; + } __packed * preqparm; + struct uskrepparm { + u8 subfunc_code[2]; + u16 rule_array_len; + struct lv3 { + u16 len; + u16 attr_len; + u16 attr_flags; + struct cpacfkeyblock { + u8 version; /* version of this struct */ + u8 flags[2]; + u8 algo; + u8 form; + u8 pad1[3]; + u16 len; + u8 key[64]; /* the key (len bytes) */ + u16 keyattrlen; + u8 keyattr[32]; + u8 pad2[1]; + u8 vptype; + u8 vp[32]; /* verification pattern */ + } ckb; + } lv3; + } __packed * prepparm; + + /* get already prepared memory for 2 cprbs with param block each */ + rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk); + if (rc) + return rc; + + /* fill request cprb struct */ + preqcblk->domain = domain; + + /* fill request cprb param block with USK request */ + preqparm = (struct uskreqparm __force *)preqcblk->req_parmb; + memcpy(preqparm->subfunc_code, "US", 2); + preqparm->rule_array_len = sizeof(preqparm->rule_array_len); + preqparm->lv1.len = sizeof(struct lv1); + preqparm->lv1.attr_len = sizeof(struct lv1) - sizeof(preqparm->lv1.len); + preqparm->lv1.attr_flags = 0x0001; + preqparm->lv2.len = sizeof(struct lv2) + SECKEYBLOBSIZE; + preqparm->lv2.attr_len = sizeof(struct lv2) + - sizeof(preqparm->lv2.len) + SECKEYBLOBSIZE; + preqparm->lv2.attr_flags = 0x0000; + memcpy(preqparm->lv2.token, seckey, SECKEYBLOBSIZE); + preqcblk->req_parml = sizeof(struct uskreqparm) + SECKEYBLOBSIZE; + + /* fill xcrb struct */ + prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk); + + /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */ + rc = zcrypt_send_cprb(&xcrb); + if (rc) { + DEBUG_ERR("%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, rc=%d\n", + __func__, (int)cardnr, (int)domain, rc); + goto out; + } + + /* check response returncode and reasoncode */ + if (prepcblk->ccp_rtcode != 0) { + DEBUG_ERR("%s unwrap secure key failure, card response %d/%d\n", + __func__, + (int)prepcblk->ccp_rtcode, + (int)prepcblk->ccp_rscode); + if (prepcblk->ccp_rtcode == 8 && prepcblk->ccp_rscode == 2290) + rc = -EAGAIN; + else + rc = -EIO; + goto out; + } + if (prepcblk->ccp_rscode != 0) { + DEBUG_WARN("%s unwrap secure key warning, card response %d/%d\n", + __func__, + (int)prepcblk->ccp_rtcode, + (int)prepcblk->ccp_rscode); + } + + /* process response cprb param block */ + ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX); + prepcblk->rpl_parmb = (u8 __user *)ptr; + prepparm = (struct uskrepparm *)ptr; + + /* check the returned keyblock */ + if (prepparm->lv3.ckb.version != 0x01 && + prepparm->lv3.ckb.version != 0x02) { + DEBUG_ERR("%s reply param keyblock version mismatch 0x%02x\n", + __func__, (int)prepparm->lv3.ckb.version); + rc = -EIO; + goto out; + } + + /* copy the tanslated protected key */ + switch (prepparm->lv3.ckb.len) { + case 16 + 32: + /* AES 128 protected key */ + if (protkeytype) + *protkeytype = PKEY_KEYTYPE_AES_128; + break; + case 24 + 32: + /* AES 192 protected key */ + if (protkeytype) + *protkeytype = PKEY_KEYTYPE_AES_192; + break; + case 32 + 32: + /* AES 256 protected key */ + if (protkeytype) + *protkeytype = PKEY_KEYTYPE_AES_256; + break; + default: + DEBUG_ERR("%s unknown/unsupported keylen %d\n", + __func__, prepparm->lv3.ckb.len); + rc = -EIO; + goto out; + } + memcpy(protkey, prepparm->lv3.ckb.key, prepparm->lv3.ckb.len); + if (protkeylen) + *protkeylen = prepparm->lv3.ckb.len; + +out: + free_cprbmem(mem, PARMBSIZE, 0); + return rc; +} +EXPORT_SYMBOL(cca_sec2protkey); + +/* + * AES cipher key skeleton created with CSNBKTB2 with these flags: + * INTERNAL, NO-KEY, AES, CIPHER, ANY-MODE, NOEX-SYM, NOEXAASY, + * NOEXUASY, XPRTCPAC, NOEX-RAW, NOEX-DES, NOEX-AES, NOEX-RSA + * used by cca_gencipherkey() and cca_clr2cipherkey(). + */ +static const u8 aes_cipher_key_skeleton[] = { + 0x01, 0x00, 0x00, 0x38, 0x05, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, + 0x00, 0x1a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x02, 0x00, 0x01, 0x02, 0xc0, 0x00, 0xff, + 0x00, 0x03, 0x08, 0xc8, 0x00, 0x00, 0x00, 0x00 }; +#define SIZEOF_SKELETON (sizeof(aes_cipher_key_skeleton)) + +/* + * Generate (random) CCA AES CIPHER secure key. + */ +int cca_gencipherkey(u16 cardnr, u16 domain, u32 keybitsize, u32 keygenflags, + u8 *keybuf, size_t *keybufsize) +{ + int rc; + u8 *mem, *ptr; + struct CPRBX *preqcblk, *prepcblk; + struct ica_xcRB xcrb; + struct gkreqparm { + u8 subfunc_code[2]; + u16 rule_array_len; + char rule_array[2 * 8]; + struct { + u16 len; + u8 key_type_1[8]; + u8 key_type_2[8]; + u16 clear_key_bit_len; + u16 key_name_1_len; + u16 key_name_2_len; + u16 user_data_1_len; + u16 user_data_2_len; + u8 key_name_1[0]; + u8 key_name_2[0]; + u8 user_data_1[0]; + u8 user_data_2[0]; + } vud; + struct { + u16 len; + struct { + u16 len; + u16 flag; + u8 kek_id_1[0]; + } tlv1; + struct { + u16 len; + u16 flag; + u8 kek_id_2[0]; + } tlv2; + struct { + u16 len; + u16 flag; + u8 gen_key_id_1[SIZEOF_SKELETON]; + } tlv3; + struct { + u16 len; + u16 flag; + u8 gen_key_id_1_label[0]; + } tlv4; + struct { + u16 len; + u16 flag; + u8 gen_key_id_2[0]; + } tlv5; + struct { + u16 len; + u16 flag; + u8 gen_key_id_2_label[0]; + } tlv6; + } kb; + } __packed * preqparm; + struct gkrepparm { + u8 subfunc_code[2]; + u16 rule_array_len; + struct { + u16 len; + } vud; + struct { + u16 len; + struct { + u16 len; + u16 flag; + u8 gen_key[0]; /* 120-136 bytes */ + } tlv1; + } kb; + } __packed * prepparm; + struct cipherkeytoken *t; + + /* get already prepared memory for 2 cprbs with param block each */ + rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk); + if (rc) + return rc; + + /* fill request cprb struct */ + preqcblk->domain = domain; + preqcblk->req_parml = sizeof(struct gkreqparm); + + /* prepare request param block with GK request */ + preqparm = (struct gkreqparm __force *)preqcblk->req_parmb; + memcpy(preqparm->subfunc_code, "GK", 2); + preqparm->rule_array_len = sizeof(uint16_t) + 2 * 8; + memcpy(preqparm->rule_array, "AES OP ", 2 * 8); + + /* prepare vud block */ + preqparm->vud.len = sizeof(preqparm->vud); + switch (keybitsize) { + case 128: + case 192: + case 256: + break; + default: + DEBUG_ERR( + "%s unknown/unsupported keybitsize %d\n", + __func__, keybitsize); + rc = -EINVAL; + goto out; + } + preqparm->vud.clear_key_bit_len = keybitsize; + memcpy(preqparm->vud.key_type_1, "TOKEN ", 8); + memset(preqparm->vud.key_type_2, ' ', sizeof(preqparm->vud.key_type_2)); + + /* prepare kb block */ + preqparm->kb.len = sizeof(preqparm->kb); + preqparm->kb.tlv1.len = sizeof(preqparm->kb.tlv1); + preqparm->kb.tlv1.flag = 0x0030; + preqparm->kb.tlv2.len = sizeof(preqparm->kb.tlv2); + preqparm->kb.tlv2.flag = 0x0030; + preqparm->kb.tlv3.len = sizeof(preqparm->kb.tlv3); + preqparm->kb.tlv3.flag = 0x0030; + memcpy(preqparm->kb.tlv3.gen_key_id_1, + aes_cipher_key_skeleton, SIZEOF_SKELETON); + preqparm->kb.tlv4.len = sizeof(preqparm->kb.tlv4); + preqparm->kb.tlv4.flag = 0x0030; + preqparm->kb.tlv5.len = sizeof(preqparm->kb.tlv5); + preqparm->kb.tlv5.flag = 0x0030; + preqparm->kb.tlv6.len = sizeof(preqparm->kb.tlv6); + preqparm->kb.tlv6.flag = 0x0030; + + /* patch the skeleton key token export flags inside the kb block */ + if (keygenflags) { + t = (struct cipherkeytoken *)preqparm->kb.tlv3.gen_key_id_1; + t->kmf1 |= (u16)(keygenflags & 0x0000FF00); + t->kmf1 &= (u16)~(keygenflags & 0x000000FF); + } + + /* prepare xcrb struct */ + prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk); + + /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */ + rc = zcrypt_send_cprb(&xcrb); + if (rc) { + DEBUG_ERR( + "%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, rc=%d\n", + __func__, (int)cardnr, (int)domain, rc); + goto out; + } + + /* check response returncode and reasoncode */ + if (prepcblk->ccp_rtcode != 0) { + DEBUG_ERR( + "%s cipher key generate failure, card response %d/%d\n", + __func__, + (int)prepcblk->ccp_rtcode, + (int)prepcblk->ccp_rscode); + rc = -EIO; + goto out; + } + + /* process response cprb param block */ + ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX); + prepcblk->rpl_parmb = (u8 __user *)ptr; + prepparm = (struct gkrepparm *)ptr; + + /* do some plausibility checks on the key block */ + if (prepparm->kb.len < 120 + 5 * sizeof(uint16_t) || + prepparm->kb.len > 136 + 5 * sizeof(uint16_t)) { + DEBUG_ERR("%s reply with invalid or unknown key block\n", + __func__); + rc = -EIO; + goto out; + } + + /* and some checks on the generated key */ + rc = cca_check_secaescipherkey(zcrypt_dbf_info, DBF_ERR, + prepparm->kb.tlv1.gen_key, + keybitsize, 1); + if (rc) { + rc = -EIO; + goto out; + } + + /* copy the generated vlsc key token */ + t = (struct cipherkeytoken *)prepparm->kb.tlv1.gen_key; + if (keybuf) { + if (*keybufsize >= t->len) + memcpy(keybuf, t, t->len); + else + rc = -EINVAL; + } + *keybufsize = t->len; + +out: + free_cprbmem(mem, PARMBSIZE, 0); + return rc; +} +EXPORT_SYMBOL(cca_gencipherkey); + +/* + * Helper function, does a the CSNBKPI2 CPRB. + */ +static int _ip_cprb_helper(u16 cardnr, u16 domain, + const char *rule_array_1, + const char *rule_array_2, + const char *rule_array_3, + const u8 *clr_key_value, + int clr_key_bit_size, + u8 *key_token, + int *key_token_size) +{ + int rc, n; + u8 *mem, *ptr; + struct CPRBX *preqcblk, *prepcblk; + struct ica_xcRB xcrb; + struct rule_array_block { + u8 subfunc_code[2]; + u16 rule_array_len; + char rule_array[0]; + } __packed * preq_ra_block; + struct vud_block { + u16 len; + struct { + u16 len; + u16 flag; /* 0x0064 */ + u16 clr_key_bit_len; + } tlv1; + struct { + u16 len; + u16 flag; /* 0x0063 */ + u8 clr_key[0]; /* clear key value bytes */ + } tlv2; + } __packed * preq_vud_block; + struct key_block { + u16 len; + struct { + u16 len; + u16 flag; /* 0x0030 */ + u8 key_token[0]; /* key skeleton */ + } tlv1; + } __packed * preq_key_block; + struct iprepparm { + u8 subfunc_code[2]; + u16 rule_array_len; + struct { + u16 len; + } vud; + struct { + u16 len; + struct { + u16 len; + u16 flag; /* 0x0030 */ + u8 key_token[0]; /* key token */ + } tlv1; + } kb; + } __packed * prepparm; + struct cipherkeytoken *t; + int complete = strncmp(rule_array_2, "COMPLETE", 8) ? 0 : 1; + + /* get already prepared memory for 2 cprbs with param block each */ + rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk); + if (rc) + return rc; + + /* fill request cprb struct */ + preqcblk->domain = domain; + preqcblk->req_parml = 0; + + /* prepare request param block with IP request */ + preq_ra_block = (struct rule_array_block __force *)preqcblk->req_parmb; + memcpy(preq_ra_block->subfunc_code, "IP", 2); + preq_ra_block->rule_array_len = sizeof(uint16_t) + 2 * 8; + memcpy(preq_ra_block->rule_array, rule_array_1, 8); + memcpy(preq_ra_block->rule_array + 8, rule_array_2, 8); + preqcblk->req_parml = sizeof(struct rule_array_block) + 2 * 8; + if (rule_array_3) { + preq_ra_block->rule_array_len += 8; + memcpy(preq_ra_block->rule_array + 16, rule_array_3, 8); + preqcblk->req_parml += 8; + } + + /* prepare vud block */ + preq_vud_block = (struct vud_block __force *) + (preqcblk->req_parmb + preqcblk->req_parml); + n = complete ? 0 : (clr_key_bit_size + 7) / 8; + preq_vud_block->len = sizeof(struct vud_block) + n; + preq_vud_block->tlv1.len = sizeof(preq_vud_block->tlv1); + preq_vud_block->tlv1.flag = 0x0064; + preq_vud_block->tlv1.clr_key_bit_len = complete ? 0 : clr_key_bit_size; + preq_vud_block->tlv2.len = sizeof(preq_vud_block->tlv2) + n; + preq_vud_block->tlv2.flag = 0x0063; + if (!complete) + memcpy(preq_vud_block->tlv2.clr_key, clr_key_value, n); + preqcblk->req_parml += preq_vud_block->len; + + /* prepare key block */ + preq_key_block = (struct key_block __force *) + (preqcblk->req_parmb + preqcblk->req_parml); + n = *key_token_size; + preq_key_block->len = sizeof(struct key_block) + n; + preq_key_block->tlv1.len = sizeof(preq_key_block->tlv1) + n; + preq_key_block->tlv1.flag = 0x0030; + memcpy(preq_key_block->tlv1.key_token, key_token, *key_token_size); + preqcblk->req_parml += preq_key_block->len; + + /* prepare xcrb struct */ + prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk); + + /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */ + rc = zcrypt_send_cprb(&xcrb); + if (rc) { + DEBUG_ERR( + "%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, rc=%d\n", + __func__, (int)cardnr, (int)domain, rc); + goto out; + } + + /* check response returncode and reasoncode */ + if (prepcblk->ccp_rtcode != 0) { + DEBUG_ERR( + "%s CSNBKPI2 failure, card response %d/%d\n", + __func__, + (int)prepcblk->ccp_rtcode, + (int)prepcblk->ccp_rscode); + rc = -EIO; + goto out; + } + + /* process response cprb param block */ + ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX); + prepcblk->rpl_parmb = (u8 __user *)ptr; + prepparm = (struct iprepparm *)ptr; + + /* do some plausibility checks on the key block */ + if (prepparm->kb.len < 120 + 3 * sizeof(uint16_t) || + prepparm->kb.len > 136 + 3 * sizeof(uint16_t)) { + DEBUG_ERR("%s reply with invalid or unknown key block\n", + __func__); + rc = -EIO; + goto out; + } + + /* do not check the key here, it may be incomplete */ + + /* copy the vlsc key token back */ + t = (struct cipherkeytoken *)prepparm->kb.tlv1.key_token; + memcpy(key_token, t, t->len); + *key_token_size = t->len; + +out: + free_cprbmem(mem, PARMBSIZE, 0); + return rc; +} + +/* + * Build CCA AES CIPHER secure key with a given clear key value. + */ +int cca_clr2cipherkey(u16 card, u16 dom, u32 keybitsize, u32 keygenflags, + const u8 *clrkey, u8 *keybuf, size_t *keybufsize) +{ + int rc; + u8 *token; + int tokensize; + u8 exorbuf[32]; + struct cipherkeytoken *t; + + /* fill exorbuf with random data */ + get_random_bytes(exorbuf, sizeof(exorbuf)); + + /* allocate space for the key token to build */ + token = kmalloc(MAXCCAVLSCTOKENSIZE, GFP_KERNEL); + if (!token) + return -ENOMEM; + + /* prepare the token with the key skeleton */ + tokensize = SIZEOF_SKELETON; + memcpy(token, aes_cipher_key_skeleton, tokensize); + + /* patch the skeleton key token export flags */ + if (keygenflags) { + t = (struct cipherkeytoken *)token; + t->kmf1 |= (u16)(keygenflags & 0x0000FF00); + t->kmf1 &= (u16)~(keygenflags & 0x000000FF); + } + + /* + * Do the key import with the clear key value in 4 steps: + * 1/4 FIRST import with only random data + * 2/4 EXOR the clear key + * 3/4 EXOR the very same random data again + * 4/4 COMPLETE the secure cipher key import + */ + rc = _ip_cprb_helper(card, dom, "AES ", "FIRST ", "MIN3PART", + exorbuf, keybitsize, token, &tokensize); + if (rc) { + DEBUG_ERR( + "%s clear key import 1/4 with CSNBKPI2 failed, rc=%d\n", + __func__, rc); + goto out; + } + rc = _ip_cprb_helper(card, dom, "AES ", "ADD-PART", NULL, + clrkey, keybitsize, token, &tokensize); + if (rc) { + DEBUG_ERR( + "%s clear key import 2/4 with CSNBKPI2 failed, rc=%d\n", + __func__, rc); + goto out; + } + rc = _ip_cprb_helper(card, dom, "AES ", "ADD-PART", NULL, + exorbuf, keybitsize, token, &tokensize); + if (rc) { + DEBUG_ERR( + "%s clear key import 3/4 with CSNBKPI2 failed, rc=%d\n", + __func__, rc); + goto out; + } + rc = _ip_cprb_helper(card, dom, "AES ", "COMPLETE", NULL, + NULL, keybitsize, token, &tokensize); + if (rc) { + DEBUG_ERR( + "%s clear key import 4/4 with CSNBKPI2 failed, rc=%d\n", + __func__, rc); + goto out; + } + + /* copy the generated key token */ + if (keybuf) { + if (tokensize > *keybufsize) + rc = -EINVAL; + else + memcpy(keybuf, token, tokensize); + } + *keybufsize = tokensize; + +out: + kfree(token); + return rc; +} +EXPORT_SYMBOL(cca_clr2cipherkey); + +/* + * Derive proteced key from CCA AES cipher secure key. + */ +int cca_cipher2protkey(u16 cardnr, u16 domain, const u8 *ckey, + u8 *protkey, u32 *protkeylen, u32 *protkeytype) +{ + int rc; + u8 *mem, *ptr; + struct CPRBX *preqcblk, *prepcblk; + struct ica_xcRB xcrb; + struct aureqparm { + u8 subfunc_code[2]; + u16 rule_array_len; + u8 rule_array[8]; + struct { + u16 len; + u16 tk_blob_len; + u16 tk_blob_tag; + u8 tk_blob[66]; + } vud; + struct { + u16 len; + u16 cca_key_token_len; + u16 cca_key_token_flags; + u8 cca_key_token[0]; // 64 or more + } kb; + } __packed * preqparm; + struct aurepparm { + u8 subfunc_code[2]; + u16 rule_array_len; + struct { + u16 len; + u16 sublen; + u16 tag; + struct cpacfkeyblock { + u8 version; /* version of this struct */ + u8 flags[2]; + u8 algo; + u8 form; + u8 pad1[3]; + u16 keylen; + u8 key[64]; /* the key (keylen bytes) */ + u16 keyattrlen; + u8 keyattr[32]; + u8 pad2[1]; + u8 vptype; + u8 vp[32]; /* verification pattern */ + } ckb; + } vud; + struct { + u16 len; + } kb; + } __packed * prepparm; + int keytoklen = ((struct cipherkeytoken *)ckey)->len; + + /* get already prepared memory for 2 cprbs with param block each */ + rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk); + if (rc) + return rc; + + /* fill request cprb struct */ + preqcblk->domain = domain; + + /* fill request cprb param block with AU request */ + preqparm = (struct aureqparm __force *)preqcblk->req_parmb; + memcpy(preqparm->subfunc_code, "AU", 2); + preqparm->rule_array_len = + sizeof(preqparm->rule_array_len) + + sizeof(preqparm->rule_array); + memcpy(preqparm->rule_array, "EXPT-SK ", 8); + /* vud, tk blob */ + preqparm->vud.len = sizeof(preqparm->vud); + preqparm->vud.tk_blob_len = sizeof(preqparm->vud.tk_blob) + + 2 * sizeof(uint16_t); + preqparm->vud.tk_blob_tag = 0x00C2; + /* kb, cca token */ + preqparm->kb.len = keytoklen + 3 * sizeof(uint16_t); + preqparm->kb.cca_key_token_len = keytoklen + 2 * sizeof(uint16_t); + memcpy(preqparm->kb.cca_key_token, ckey, keytoklen); + /* now fill length of param block into cprb */ + preqcblk->req_parml = sizeof(struct aureqparm) + keytoklen; + + /* fill xcrb struct */ + prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk); + + /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */ + rc = zcrypt_send_cprb(&xcrb); + if (rc) { + DEBUG_ERR( + "%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, rc=%d\n", + __func__, (int)cardnr, (int)domain, rc); + goto out; + } + + /* check response returncode and reasoncode */ + if (prepcblk->ccp_rtcode != 0) { + DEBUG_ERR( + "%s unwrap secure key failure, card response %d/%d\n", + __func__, + (int)prepcblk->ccp_rtcode, + (int)prepcblk->ccp_rscode); + if (prepcblk->ccp_rtcode == 8 && prepcblk->ccp_rscode == 2290) + rc = -EAGAIN; + else + rc = -EIO; + goto out; + } + if (prepcblk->ccp_rscode != 0) { + DEBUG_WARN( + "%s unwrap secure key warning, card response %d/%d\n", + __func__, + (int)prepcblk->ccp_rtcode, + (int)prepcblk->ccp_rscode); + } + + /* process response cprb param block */ + ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX); + prepcblk->rpl_parmb = (u8 __user *)ptr; + prepparm = (struct aurepparm *)ptr; + + /* check the returned keyblock */ + if (prepparm->vud.ckb.version != 0x01 && + prepparm->vud.ckb.version != 0x02) { + DEBUG_ERR("%s reply param keyblock version mismatch 0x%02x\n", + __func__, (int)prepparm->vud.ckb.version); + rc = -EIO; + goto out; + } + if (prepparm->vud.ckb.algo != 0x02) { + DEBUG_ERR( + "%s reply param keyblock algo mismatch 0x%02x != 0x02\n", + __func__, (int)prepparm->vud.ckb.algo); + rc = -EIO; + goto out; + } + + /* copy the translated protected key */ + switch (prepparm->vud.ckb.keylen) { + case 16 + 32: + /* AES 128 protected key */ + if (protkeytype) + *protkeytype = PKEY_KEYTYPE_AES_128; + break; + case 24 + 32: + /* AES 192 protected key */ + if (protkeytype) + *protkeytype = PKEY_KEYTYPE_AES_192; + break; + case 32 + 32: + /* AES 256 protected key */ + if (protkeytype) + *protkeytype = PKEY_KEYTYPE_AES_256; + break; + default: + DEBUG_ERR("%s unknown/unsupported keylen %d\n", + __func__, prepparm->vud.ckb.keylen); + rc = -EIO; + goto out; + } + memcpy(protkey, prepparm->vud.ckb.key, prepparm->vud.ckb.keylen); + if (protkeylen) + *protkeylen = prepparm->vud.ckb.keylen; + +out: + free_cprbmem(mem, PARMBSIZE, 0); + return rc; +} +EXPORT_SYMBOL(cca_cipher2protkey); + +/* + * Derive protected key from CCA ECC secure private key. + */ +int cca_ecc2protkey(u16 cardnr, u16 domain, const u8 *key, + u8 *protkey, u32 *protkeylen, u32 *protkeytype) +{ + int rc; + u8 *mem, *ptr; + struct CPRBX *preqcblk, *prepcblk; + struct ica_xcRB xcrb; + struct aureqparm { + u8 subfunc_code[2]; + u16 rule_array_len; + u8 rule_array[8]; + struct { + u16 len; + u16 tk_blob_len; + u16 tk_blob_tag; + u8 tk_blob[66]; + } vud; + struct { + u16 len; + u16 cca_key_token_len; + u16 cca_key_token_flags; + u8 cca_key_token[0]; + } kb; + } __packed * preqparm; + struct aurepparm { + u8 subfunc_code[2]; + u16 rule_array_len; + struct { + u16 len; + u16 sublen; + u16 tag; + struct cpacfkeyblock { + u8 version; /* version of this struct */ + u8 flags[2]; + u8 algo; + u8 form; + u8 pad1[3]; + u16 keylen; + u8 key[0]; /* the key (keylen bytes) */ + u16 keyattrlen; + u8 keyattr[32]; + u8 pad2[1]; + u8 vptype; + u8 vp[32]; /* verification pattern */ + } ckb; + } vud; + struct { + u16 len; + } kb; + } __packed * prepparm; + int keylen = ((struct eccprivkeytoken *)key)->len; + + /* get already prepared memory for 2 cprbs with param block each */ + rc = alloc_and_prep_cprbmem(PARMBSIZE, &mem, &preqcblk, &prepcblk); + if (rc) + return rc; + + /* fill request cprb struct */ + preqcblk->domain = domain; + + /* fill request cprb param block with AU request */ + preqparm = (struct aureqparm __force *)preqcblk->req_parmb; + memcpy(preqparm->subfunc_code, "AU", 2); + preqparm->rule_array_len = + sizeof(preqparm->rule_array_len) + + sizeof(preqparm->rule_array); + memcpy(preqparm->rule_array, "EXPT-SK ", 8); + /* vud, tk blob */ + preqparm->vud.len = sizeof(preqparm->vud); + preqparm->vud.tk_blob_len = sizeof(preqparm->vud.tk_blob) + + 2 * sizeof(uint16_t); + preqparm->vud.tk_blob_tag = 0x00C2; + /* kb, cca token */ + preqparm->kb.len = keylen + 3 * sizeof(uint16_t); + preqparm->kb.cca_key_token_len = keylen + 2 * sizeof(uint16_t); + memcpy(preqparm->kb.cca_key_token, key, keylen); + /* now fill length of param block into cprb */ + preqcblk->req_parml = sizeof(struct aureqparm) + keylen; + + /* fill xcrb struct */ + prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk); + + /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */ + rc = zcrypt_send_cprb(&xcrb); + if (rc) { + DEBUG_ERR( + "%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, rc=%d\n", + __func__, (int)cardnr, (int)domain, rc); + goto out; + } + + /* check response returncode and reasoncode */ + if (prepcblk->ccp_rtcode != 0) { + DEBUG_ERR( + "%s unwrap secure key failure, card response %d/%d\n", + __func__, + (int)prepcblk->ccp_rtcode, + (int)prepcblk->ccp_rscode); + if (prepcblk->ccp_rtcode == 8 && prepcblk->ccp_rscode == 2290) + rc = -EAGAIN; + else + rc = -EIO; + goto out; + } + if (prepcblk->ccp_rscode != 0) { + DEBUG_WARN( + "%s unwrap secure key warning, card response %d/%d\n", + __func__, + (int)prepcblk->ccp_rtcode, + (int)prepcblk->ccp_rscode); + } + + /* process response cprb param block */ + ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX); + prepcblk->rpl_parmb = (u8 __user *)ptr; + prepparm = (struct aurepparm *)ptr; + + /* check the returned keyblock */ + if (prepparm->vud.ckb.version != 0x02) { + DEBUG_ERR("%s reply param keyblock version mismatch 0x%02x != 0x02\n", + __func__, (int)prepparm->vud.ckb.version); + rc = -EIO; + goto out; + } + if (prepparm->vud.ckb.algo != 0x81) { + DEBUG_ERR( + "%s reply param keyblock algo mismatch 0x%02x != 0x81\n", + __func__, (int)prepparm->vud.ckb.algo); + rc = -EIO; + goto out; + } + + /* copy the translated protected key */ + if (prepparm->vud.ckb.keylen > *protkeylen) { + DEBUG_ERR("%s prot keylen mismatch %d > buffersize %u\n", + __func__, prepparm->vud.ckb.keylen, *protkeylen); + rc = -EIO; + goto out; + } + memcpy(protkey, prepparm->vud.ckb.key, prepparm->vud.ckb.keylen); + *protkeylen = prepparm->vud.ckb.keylen; + if (protkeytype) + *protkeytype = PKEY_KEYTYPE_ECC; + +out: + free_cprbmem(mem, PARMBSIZE, 0); + return rc; +} +EXPORT_SYMBOL(cca_ecc2protkey); + +/* + * query cryptographic facility from CCA adapter + */ +int cca_query_crypto_facility(u16 cardnr, u16 domain, + const char *keyword, + u8 *rarray, size_t *rarraylen, + u8 *varray, size_t *varraylen) +{ + int rc; + u16 len; + u8 *mem, *ptr; + struct CPRBX *preqcblk, *prepcblk; + struct ica_xcRB xcrb; + struct fqreqparm { + u8 subfunc_code[2]; + u16 rule_array_len; + char rule_array[8]; + struct lv1 { + u16 len; + u8 data[VARDATASIZE]; + } lv1; + u16 dummylen; + } __packed * preqparm; + size_t parmbsize = sizeof(struct fqreqparm); + struct fqrepparm { + u8 subfunc_code[2]; + u8 lvdata[0]; + } __packed * prepparm; + + /* get already prepared memory for 2 cprbs with param block each */ + rc = alloc_and_prep_cprbmem(parmbsize, &mem, &preqcblk, &prepcblk); + if (rc) + return rc; + + /* fill request cprb struct */ + preqcblk->domain = domain; + + /* fill request cprb param block with FQ request */ + preqparm = (struct fqreqparm __force *)preqcblk->req_parmb; + memcpy(preqparm->subfunc_code, "FQ", 2); + memcpy(preqparm->rule_array, keyword, sizeof(preqparm->rule_array)); + preqparm->rule_array_len = + sizeof(preqparm->rule_array_len) + sizeof(preqparm->rule_array); + preqparm->lv1.len = sizeof(preqparm->lv1); + preqparm->dummylen = sizeof(preqparm->dummylen); + preqcblk->req_parml = parmbsize; + + /* fill xcrb struct */ + prep_xcrb(&xcrb, cardnr, preqcblk, prepcblk); + + /* forward xcrb with request CPRB and reply CPRB to zcrypt dd */ + rc = zcrypt_send_cprb(&xcrb); + if (rc) { + DEBUG_ERR("%s zcrypt_send_cprb (cardnr=%d domain=%d) failed, rc=%d\n", + __func__, (int)cardnr, (int)domain, rc); + goto out; + } + + /* check response returncode and reasoncode */ + if (prepcblk->ccp_rtcode != 0) { + DEBUG_ERR("%s unwrap secure key failure, card response %d/%d\n", + __func__, + (int)prepcblk->ccp_rtcode, + (int)prepcblk->ccp_rscode); + rc = -EIO; + goto out; + } + + /* process response cprb param block */ + ptr = ((u8 *)prepcblk) + sizeof(struct CPRBX); + prepcblk->rpl_parmb = (u8 __user *)ptr; + prepparm = (struct fqrepparm *)ptr; + ptr = prepparm->lvdata; + + /* check and possibly copy reply rule array */ + len = *((u16 *)ptr); + if (len > sizeof(u16)) { + ptr += sizeof(u16); + len -= sizeof(u16); + if (rarray && rarraylen && *rarraylen > 0) { + *rarraylen = (len > *rarraylen ? *rarraylen : len); + memcpy(rarray, ptr, *rarraylen); + } + ptr += len; + } + /* check and possible copy reply var array */ + len = *((u16 *)ptr); + if (len > sizeof(u16)) { + ptr += sizeof(u16); + len -= sizeof(u16); + if (varray && varraylen && *varraylen > 0) { + *varraylen = (len > *varraylen ? *varraylen : len); + memcpy(varray, ptr, *varraylen); + } + ptr += len; + } + +out: + free_cprbmem(mem, parmbsize, 0); + return rc; +} +EXPORT_SYMBOL(cca_query_crypto_facility); + +static int cca_info_cache_fetch(u16 cardnr, u16 domain, struct cca_info *ci) +{ + int rc = -ENOENT; + struct cca_info_list_entry *ptr; + + spin_lock_bh(&cca_info_list_lock); + list_for_each_entry(ptr, &cca_info_list, list) { + if (ptr->cardnr == cardnr && ptr->domain == domain) { + memcpy(ci, &ptr->info, sizeof(*ci)); + rc = 0; + break; + } + } + spin_unlock_bh(&cca_info_list_lock); + + return rc; +} + +static void cca_info_cache_update(u16 cardnr, u16 domain, + const struct cca_info *ci) +{ + int found = 0; + struct cca_info_list_entry *ptr; + + spin_lock_bh(&cca_info_list_lock); + list_for_each_entry(ptr, &cca_info_list, list) { + if (ptr->cardnr == cardnr && + ptr->domain == domain) { + memcpy(&ptr->info, ci, sizeof(*ci)); + found = 1; + break; + } + } + if (!found) { + ptr = kmalloc(sizeof(*ptr), GFP_ATOMIC); + if (!ptr) { + spin_unlock_bh(&cca_info_list_lock); + return; + } + ptr->cardnr = cardnr; + ptr->domain = domain; + memcpy(&ptr->info, ci, sizeof(*ci)); + list_add(&ptr->list, &cca_info_list); + } + spin_unlock_bh(&cca_info_list_lock); +} + +static void cca_info_cache_scrub(u16 cardnr, u16 domain) +{ + struct cca_info_list_entry *ptr; + + spin_lock_bh(&cca_info_list_lock); + list_for_each_entry(ptr, &cca_info_list, list) { + if (ptr->cardnr == cardnr && + ptr->domain == domain) { + list_del(&ptr->list); + kfree(ptr); + break; + } + } + spin_unlock_bh(&cca_info_list_lock); +} + +static void __exit mkvp_cache_free(void) +{ + struct cca_info_list_entry *ptr, *pnext; + + spin_lock_bh(&cca_info_list_lock); + list_for_each_entry_safe(ptr, pnext, &cca_info_list, list) { + list_del(&ptr->list); + kfree(ptr); + } + spin_unlock_bh(&cca_info_list_lock); +} + +/* + * Fetch cca_info values via query_crypto_facility from adapter. + */ +static int fetch_cca_info(u16 cardnr, u16 domain, struct cca_info *ci) +{ + int rc, found = 0; + size_t rlen, vlen; + u8 *rarray, *varray, *pg; + struct zcrypt_device_status_ext devstat; + + memset(ci, 0, sizeof(*ci)); + + /* get first info from zcrypt device driver about this apqn */ + rc = zcrypt_device_status_ext(cardnr, domain, &devstat); + if (rc) + return rc; + ci->hwtype = devstat.hwtype; + + /* prep page for rule array and var array use */ + pg = (u8 *)__get_free_page(GFP_KERNEL); + if (!pg) + return -ENOMEM; + rarray = pg; + varray = pg + PAGE_SIZE / 2; + rlen = vlen = PAGE_SIZE / 2; + + /* QF for this card/domain */ + rc = cca_query_crypto_facility(cardnr, domain, "STATICSA", + rarray, &rlen, varray, &vlen); + if (rc == 0 && rlen >= 10 * 8 && vlen >= 204) { + memcpy(ci->serial, rarray, 8); + ci->new_asym_mk_state = (char)rarray[4 * 8]; + ci->cur_asym_mk_state = (char)rarray[5 * 8]; + ci->old_asym_mk_state = (char)rarray[6 * 8]; + if (ci->old_asym_mk_state == '2') + memcpy(ci->old_asym_mkvp, varray + 64, 16); + if (ci->cur_asym_mk_state == '2') + memcpy(ci->cur_asym_mkvp, varray + 84, 16); + if (ci->new_asym_mk_state == '3') + memcpy(ci->new_asym_mkvp, varray + 104, 16); + ci->new_aes_mk_state = (char)rarray[7 * 8]; + ci->cur_aes_mk_state = (char)rarray[8 * 8]; + ci->old_aes_mk_state = (char)rarray[9 * 8]; + if (ci->old_aes_mk_state == '2') + memcpy(&ci->old_aes_mkvp, varray + 172, 8); + if (ci->cur_aes_mk_state == '2') + memcpy(&ci->cur_aes_mkvp, varray + 184, 8); + if (ci->new_aes_mk_state == '3') + memcpy(&ci->new_aes_mkvp, varray + 196, 8); + found++; + } + if (!found) + goto out; + rlen = vlen = PAGE_SIZE / 2; + rc = cca_query_crypto_facility(cardnr, domain, "STATICSB", + rarray, &rlen, varray, &vlen); + if (rc == 0 && rlen >= 13 * 8 && vlen >= 240) { + ci->new_apka_mk_state = (char)rarray[10 * 8]; + ci->cur_apka_mk_state = (char)rarray[11 * 8]; + ci->old_apka_mk_state = (char)rarray[12 * 8]; + if (ci->old_apka_mk_state == '2') + memcpy(&ci->old_apka_mkvp, varray + 208, 8); + if (ci->cur_apka_mk_state == '2') + memcpy(&ci->cur_apka_mkvp, varray + 220, 8); + if (ci->new_apka_mk_state == '3') + memcpy(&ci->new_apka_mkvp, varray + 232, 8); + found++; + } + +out: + free_page((unsigned long)pg); + return found == 2 ? 0 : -ENOENT; +} + +/* + * Fetch cca information about a CCA queue. + */ +int cca_get_info(u16 card, u16 dom, struct cca_info *ci, int verify) +{ + int rc; + + rc = cca_info_cache_fetch(card, dom, ci); + if (rc || verify) { + rc = fetch_cca_info(card, dom, ci); + if (rc == 0) + cca_info_cache_update(card, dom, ci); + } + + return rc; +} +EXPORT_SYMBOL(cca_get_info); + +/* + * Search for a matching crypto card based on the + * Master Key Verification Pattern given. + */ +static int findcard(u64 mkvp, u16 *pcardnr, u16 *pdomain, + int verify, int minhwtype) +{ + struct zcrypt_device_status_ext *device_status; + u16 card, dom; + struct cca_info ci; + int i, rc, oi = -1; + + /* mkvp must not be zero, minhwtype needs to be >= 0 */ + if (mkvp == 0 || minhwtype < 0) + return -EINVAL; + + /* fetch status of all crypto cards */ + device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT, + sizeof(struct zcrypt_device_status_ext), + GFP_KERNEL); + if (!device_status) + return -ENOMEM; + zcrypt_device_status_mask_ext(device_status); + + /* walk through all crypto cards */ + for (i = 0; i < MAX_ZDEV_ENTRIES_EXT; i++) { + card = AP_QID_CARD(device_status[i].qid); + dom = AP_QID_QUEUE(device_status[i].qid); + if (device_status[i].online && + device_status[i].functions & 0x04) { + /* enabled CCA card, check current mkvp from cache */ + if (cca_info_cache_fetch(card, dom, &ci) == 0 && + ci.hwtype >= minhwtype && + ci.cur_aes_mk_state == '2' && + ci.cur_aes_mkvp == mkvp) { + if (!verify) + break; + /* verify: refresh card info */ + if (fetch_cca_info(card, dom, &ci) == 0) { + cca_info_cache_update(card, dom, &ci); + if (ci.hwtype >= minhwtype && + ci.cur_aes_mk_state == '2' && + ci.cur_aes_mkvp == mkvp) + break; + } + } + } else { + /* Card is offline and/or not a CCA card. */ + /* del mkvp entry from cache if it exists */ + cca_info_cache_scrub(card, dom); + } + } + if (i >= MAX_ZDEV_ENTRIES_EXT) { + /* nothing found, so this time without cache */ + for (i = 0; i < MAX_ZDEV_ENTRIES_EXT; i++) { + if (!(device_status[i].online && + device_status[i].functions & 0x04)) + continue; + card = AP_QID_CARD(device_status[i].qid); + dom = AP_QID_QUEUE(device_status[i].qid); + /* fresh fetch mkvp from adapter */ + if (fetch_cca_info(card, dom, &ci) == 0) { + cca_info_cache_update(card, dom, &ci); + if (ci.hwtype >= minhwtype && + ci.cur_aes_mk_state == '2' && + ci.cur_aes_mkvp == mkvp) + break; + if (ci.hwtype >= minhwtype && + ci.old_aes_mk_state == '2' && + ci.old_aes_mkvp == mkvp && + oi < 0) + oi = i; + } + } + if (i >= MAX_ZDEV_ENTRIES_EXT && oi >= 0) { + /* old mkvp matched, use this card then */ + card = AP_QID_CARD(device_status[oi].qid); + dom = AP_QID_QUEUE(device_status[oi].qid); + } + } + if (i < MAX_ZDEV_ENTRIES_EXT || oi >= 0) { + if (pcardnr) + *pcardnr = card; + if (pdomain) + *pdomain = dom; + rc = (i < MAX_ZDEV_ENTRIES_EXT ? 0 : 1); + } else { + rc = -ENODEV; + } + + kvfree(device_status); + return rc; +} + +/* + * Search for a matching crypto card based on the Master Key + * Verification Pattern provided inside a secure key token. + */ +int cca_findcard(const u8 *key, u16 *pcardnr, u16 *pdomain, int verify) +{ + u64 mkvp; + int minhwtype = 0; + const struct keytoken_header *hdr = (struct keytoken_header *)key; + + if (hdr->type != TOKTYPE_CCA_INTERNAL) + return -EINVAL; + + switch (hdr->version) { + case TOKVER_CCA_AES: + mkvp = ((struct secaeskeytoken *)key)->mkvp; + break; + case TOKVER_CCA_VLSC: + mkvp = ((struct cipherkeytoken *)key)->mkvp0; + minhwtype = AP_DEVICE_TYPE_CEX6; + break; + default: + return -EINVAL; + } + + return findcard(mkvp, pcardnr, pdomain, verify, minhwtype); +} +EXPORT_SYMBOL(cca_findcard); + +int cca_findcard2(u32 **apqns, u32 *nr_apqns, u16 cardnr, u16 domain, + int minhwtype, int mktype, u64 cur_mkvp, u64 old_mkvp, + int verify) +{ + struct zcrypt_device_status_ext *device_status; + u32 *_apqns = NULL, _nr_apqns = 0; + int i, card, dom, curmatch, oldmatch, rc = 0; + struct cca_info ci; + + /* fetch status of all crypto cards */ + device_status = kvmalloc_array(MAX_ZDEV_ENTRIES_EXT, + sizeof(struct zcrypt_device_status_ext), + GFP_KERNEL); + if (!device_status) + return -ENOMEM; + zcrypt_device_status_mask_ext(device_status); + + /* allocate 1k space for up to 256 apqns */ + _apqns = kmalloc_array(256, sizeof(u32), GFP_KERNEL); + if (!_apqns) { + kvfree(device_status); + return -ENOMEM; + } + + /* walk through all the crypto apqnss */ + for (i = 0; i < MAX_ZDEV_ENTRIES_EXT; i++) { + card = AP_QID_CARD(device_status[i].qid); + dom = AP_QID_QUEUE(device_status[i].qid); + /* check online state */ + if (!device_status[i].online) + continue; + /* check for cca functions */ + if (!(device_status[i].functions & 0x04)) + continue; + /* check cardnr */ + if (cardnr != 0xFFFF && card != cardnr) + continue; + /* check domain */ + if (domain != 0xFFFF && dom != domain) + continue; + /* get cca info on this apqn */ + if (cca_get_info(card, dom, &ci, verify)) + continue; + /* current master key needs to be valid */ + if (mktype == AES_MK_SET && ci.cur_aes_mk_state != '2') + continue; + if (mktype == APKA_MK_SET && ci.cur_apka_mk_state != '2') + continue; + /* check min hardware type */ + if (minhwtype > 0 && minhwtype > ci.hwtype) + continue; + if (cur_mkvp || old_mkvp) { + /* check mkvps */ + curmatch = oldmatch = 0; + if (mktype == AES_MK_SET) { + if (cur_mkvp && cur_mkvp == ci.cur_aes_mkvp) + curmatch = 1; + if (old_mkvp && ci.old_aes_mk_state == '2' && + old_mkvp == ci.old_aes_mkvp) + oldmatch = 1; + } else { + if (cur_mkvp && cur_mkvp == ci.cur_apka_mkvp) + curmatch = 1; + if (old_mkvp && ci.old_apka_mk_state == '2' && + old_mkvp == ci.old_apka_mkvp) + oldmatch = 1; + } + if (curmatch + oldmatch < 1) + continue; + } + /* apqn passed all filtering criterons, add to the array */ + if (_nr_apqns < 256) + _apqns[_nr_apqns++] = (((u16)card) << 16) | ((u16)dom); + } + + /* nothing found ? */ + if (!_nr_apqns) { + kfree(_apqns); + rc = -ENODEV; + } else { + /* no re-allocation, simple return the _apqns array */ + *apqns = _apqns; + *nr_apqns = _nr_apqns; + rc = 0; + } + + kvfree(device_status); + return rc; +} +EXPORT_SYMBOL(cca_findcard2); + +void __exit zcrypt_ccamisc_exit(void) +{ + mkvp_cache_free(); +} |