1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Copyright IBM Corp. 2019 4 * Author(s): Harald Freudenberger <freude@linux.ibm.com> 5 * Ingo Franzki <ifranzki@linux.ibm.com> 6 * 7 * Collection of CCA misc functions used by zcrypt and pkey 8 */ 9 10 #ifndef _ZCRYPT_CCAMISC_H_ 11 #define _ZCRYPT_CCAMISC_H_ 12 13 #include <asm/zcrypt.h> 14 #include <asm/pkey.h> 15 16 /* Key token types */ 17 #define TOKTYPE_NON_CCA 0x00 /* Non-CCA key token */ 18 #define TOKTYPE_CCA_INTERNAL 0x01 /* CCA internal sym key token */ 19 #define TOKTYPE_CCA_INTERNAL_PKA 0x1f /* CCA internal asym key token */ 20 21 /* For TOKTYPE_NON_CCA: */ 22 #define TOKVER_PROTECTED_KEY 0x01 /* Protected key token */ 23 #define TOKVER_CLEAR_KEY 0x02 /* Clear key token */ 24 25 /* For TOKTYPE_CCA_INTERNAL: */ 26 #define TOKVER_CCA_AES 0x04 /* CCA AES key token */ 27 #define TOKVER_CCA_VLSC 0x05 /* var length sym cipher key token */ 28 29 /* Max size of a cca variable length cipher key token */ 30 #define MAXCCAVLSCTOKENSIZE 725 31 32 /* header part of a CCA key token */ 33 struct keytoken_header { 34 u8 type; /* one of the TOKTYPE values */ 35 u8 res0[1]; 36 u16 len; /* vlsc token: total length in bytes */ 37 u8 version; /* one of the TOKVER values */ 38 u8 res1[3]; 39 } __packed; 40 41 /* inside view of a CCA secure key token (only type 0x01 version 0x04) */ 42 struct secaeskeytoken { 43 u8 type; /* 0x01 for internal key token */ 44 u8 res0[3]; 45 u8 version; /* should be 0x04 */ 46 u8 res1[1]; 47 u8 flag; /* key flags */ 48 u8 res2[1]; 49 u64 mkvp; /* master key verification pattern */ 50 u8 key[32]; /* key value (encrypted) */ 51 u8 cv[8]; /* control vector */ 52 u16 bitsize; /* key bit size */ 53 u16 keysize; /* key byte size */ 54 u8 tvv[4]; /* token validation value */ 55 } __packed; 56 57 /* inside view of a variable length symmetric cipher AES key token */ 58 struct cipherkeytoken { 59 u8 type; /* 0x01 for internal key token */ 60 u8 res0[1]; 61 u16 len; /* total key token length in bytes */ 62 u8 version; /* should be 0x05 */ 63 u8 res1[3]; 64 u8 kms; /* key material state, 0x03 means wrapped with MK */ 65 u8 kvpt; /* key verification pattern type, should be 0x01 */ 66 u64 mkvp0; /* master key verification pattern, lo part */ 67 u64 mkvp1; /* master key verification pattern, hi part (unused) */ 68 u8 eskwm; /* encrypted section key wrapping method */ 69 u8 hashalg; /* hash algorithmus used for wrapping key */ 70 u8 plfver; /* pay load format version */ 71 u8 res2[1]; 72 u8 adsver; /* associated data section version */ 73 u8 res3[1]; 74 u16 adslen; /* associated data section length */ 75 u8 kllen; /* optional key label length */ 76 u8 ieaslen; /* optional extended associated data length */ 77 u8 uadlen; /* optional user definable associated data length */ 78 u8 res4[1]; 79 u16 wpllen; /* wrapped payload length in bits: */ 80 /* plfver 0x00 0x01 */ 81 /* AES-128 512 640 */ 82 /* AES-192 576 640 */ 83 /* AES-256 640 640 */ 84 u8 res5[1]; 85 u8 algtype; /* 0x02 for AES cipher */ 86 u16 keytype; /* 0x0001 for 'cipher' */ 87 u8 kufc; /* key usage field count */ 88 u16 kuf1; /* key usage field 1 */ 89 u16 kuf2; /* key usage field 2 */ 90 u8 kmfc; /* key management field count */ 91 u16 kmf1; /* key management field 1 */ 92 u16 kmf2; /* key management field 2 */ 93 u16 kmf3; /* key management field 3 */ 94 u8 vdata[]; /* variable part data follows */ 95 } __packed; 96 97 /* inside view of an CCA secure ECC private key */ 98 struct eccprivkeytoken { 99 u8 type; /* 0x1f for internal asym key token */ 100 u8 version; /* should be 0x00 */ 101 u16 len; /* total key token length in bytes */ 102 u8 res1[4]; 103 u8 secid; /* 0x20 for ECC priv key section marker */ 104 u8 secver; /* section version */ 105 u16 seclen; /* section length */ 106 u8 wtype; /* wrapping method, 0x00 clear, 0x01 AES */ 107 u8 htype; /* hash method, 0x02 for SHA-256 */ 108 u8 res2[2]; 109 u8 kutc; /* key usage and translation control */ 110 u8 ctype; /* curve type */ 111 u8 kfs; /* key format and security */ 112 u8 ksrc; /* key source */ 113 u16 pbitlen; /* length of prime p in bits */ 114 u16 ibmadlen; /* IBM associated data length in bytes */ 115 u64 mkvp; /* master key verification pattern */ 116 u8 opk[48]; /* encrypted object protection key data */ 117 u16 adatalen; /* associated data length in bytes */ 118 u16 fseclen; /* formatted section length in bytes */ 119 u8 more_data[]; /* more data follows */ 120 } __packed; 121 122 /* Some defines for the CCA AES cipherkeytoken kmf1 field */ 123 #define KMF1_XPRT_SYM 0x8000 124 #define KMF1_XPRT_UASY 0x4000 125 #define KMF1_XPRT_AASY 0x2000 126 #define KMF1_XPRT_RAW 0x1000 127 #define KMF1_XPRT_CPAC 0x0800 128 #define KMF1_XPRT_DES 0x0080 129 #define KMF1_XPRT_AES 0x0040 130 #define KMF1_XPRT_RSA 0x0008 131 132 /* 133 * Simple check if the token is a valid CCA secure AES data key 134 * token. If keybitsize is given, the bitsize of the key is 135 * also checked. Returns 0 on success or errno value on failure. 136 */ 137 int cca_check_secaeskeytoken(debug_info_t *dbg, int dbflvl, 138 const u8 *token, int keybitsize); 139 140 /* 141 * Simple check if the token is a valid CCA secure AES cipher key 142 * token. If keybitsize is given, the bitsize of the key is 143 * also checked. If checkcpacfexport is enabled, the key is also 144 * checked for the export flag to allow CPACF export. 145 * Returns 0 on success or errno value on failure. 146 */ 147 int cca_check_secaescipherkey(debug_info_t *dbg, int dbflvl, 148 const u8 *token, int keybitsize, 149 int checkcpacfexport); 150 151 /* 152 * Simple check if the token is a valid CCA secure ECC private 153 * key token. Returns 0 on success or errno value on failure. 154 */ 155 int cca_check_sececckeytoken(debug_info_t *dbg, int dbflvl, 156 const u8 *token, size_t keysize, 157 int checkcpacfexport); 158 159 /* 160 * Generate (random) CCA AES DATA secure key. 161 */ 162 int cca_genseckey(u16 cardnr, u16 domain, u32 keybitsize, u8 *seckey); 163 164 /* 165 * Generate CCA AES DATA secure key with given clear key value. 166 */ 167 int cca_clr2seckey(u16 cardnr, u16 domain, u32 keybitsize, 168 const u8 *clrkey, u8 *seckey); 169 170 /* 171 * Derive proteced key from an CCA AES DATA secure key. 172 */ 173 int cca_sec2protkey(u16 cardnr, u16 domain, 174 const u8 *seckey, u8 *protkey, u32 *protkeylen, 175 u32 *protkeytype); 176 177 /* 178 * Generate (random) CCA AES CIPHER secure key. 179 */ 180 int cca_gencipherkey(u16 cardnr, u16 domain, u32 keybitsize, u32 keygenflags, 181 u8 *keybuf, size_t *keybufsize); 182 183 /* 184 * Derive proteced key from CCA AES cipher secure key. 185 */ 186 int cca_cipher2protkey(u16 cardnr, u16 domain, const u8 *ckey, 187 u8 *protkey, u32 *protkeylen, u32 *protkeytype); 188 189 /* 190 * Build CCA AES CIPHER secure key with a given clear key value. 191 */ 192 int cca_clr2cipherkey(u16 cardnr, u16 domain, u32 keybitsize, u32 keygenflags, 193 const u8 *clrkey, u8 *keybuf, size_t *keybufsize); 194 195 /* 196 * Derive proteced key from CCA ECC secure private key. 197 */ 198 int cca_ecc2protkey(u16 cardnr, u16 domain, const u8 *key, 199 u8 *protkey, u32 *protkeylen, u32 *protkeytype); 200 201 /* 202 * Query cryptographic facility from CCA adapter 203 */ 204 int cca_query_crypto_facility(u16 cardnr, u16 domain, 205 const char *keyword, 206 u8 *rarray, size_t *rarraylen, 207 u8 *varray, size_t *varraylen); 208 209 /* 210 * Search for a matching crypto card based on the Master Key 211 * Verification Pattern provided inside a secure key. 212 * Works with CCA AES data and cipher keys. 213 * Returns < 0 on failure, 0 if CURRENT MKVP matches and 214 * 1 if OLD MKVP matches. 215 */ 216 int cca_findcard(const u8 *key, u16 *pcardnr, u16 *pdomain, int verify); 217 218 /* 219 * Build a list of cca apqns meeting the following constrains: 220 * - apqn is online and is in fact a CCA apqn 221 * - if cardnr is not FFFF only apqns with this cardnr 222 * - if domain is not FFFF only apqns with this domainnr 223 * - if minhwtype > 0 only apqns with hwtype >= minhwtype 224 * - if cur_mkvp != 0 only apqns where cur_mkvp == mkvp 225 * - if old_mkvp != 0 only apqns where old_mkvp == mkvp 226 * - if verify is enabled and a cur_mkvp and/or old_mkvp 227 * value is given, then refetch the cca_info and make sure the current 228 * cur_mkvp or old_mkvp values of the apqn are used. 229 * The mktype determines which set of master keys to use: 230 * 0 = AES_MK_SET - AES MK set, 1 = APKA MK_SET - APKA MK set 231 * The array of apqn entries is allocated with kmalloc and returned in *apqns; 232 * the number of apqns stored into the list is returned in *nr_apqns. One apqn 233 * entry is simple a 32 bit value with 16 bit cardnr and 16 bit domain nr and 234 * may be casted to struct pkey_apqn. The return value is either 0 for success 235 * or a negative errno value. If no apqn meeting the criteria is found, 236 * -ENODEV is returned. 237 */ 238 int cca_findcard2(u32 **apqns, u32 *nr_apqns, u16 cardnr, u16 domain, 239 int minhwtype, int mktype, u64 cur_mkvp, u64 old_mkvp, 240 int verify); 241 242 #define AES_MK_SET 0 243 #define APKA_MK_SET 1 244 245 /* struct to hold info for each CCA queue */ 246 struct cca_info { 247 int hwtype; /* one of the defined AP_DEVICE_TYPE_* */ 248 char new_aes_mk_state; /* '1' empty, '2' partially full, '3' full */ 249 char cur_aes_mk_state; /* '1' invalid, '2' valid */ 250 char old_aes_mk_state; /* '1' invalid, '2' valid */ 251 char new_apka_mk_state; /* '1' empty, '2' partially full, '3' full */ 252 char cur_apka_mk_state; /* '1' invalid, '2' valid */ 253 char old_apka_mk_state; /* '1' invalid, '2' valid */ 254 char new_asym_mk_state; /* '1' empty, '2' partially full, '3' full */ 255 char cur_asym_mk_state; /* '1' invalid, '2' valid */ 256 char old_asym_mk_state; /* '1' invalid, '2' valid */ 257 u64 new_aes_mkvp; /* truncated sha256 of new aes master key */ 258 u64 cur_aes_mkvp; /* truncated sha256 of current aes master key */ 259 u64 old_aes_mkvp; /* truncated sha256 of old aes master key */ 260 u64 new_apka_mkvp; /* truncated sha256 of new apka master key */ 261 u64 cur_apka_mkvp; /* truncated sha256 of current apka mk */ 262 u64 old_apka_mkvp; /* truncated sha256 of old apka mk */ 263 u8 new_asym_mkvp[16]; /* verify pattern of new asym master key */ 264 u8 cur_asym_mkvp[16]; /* verify pattern of current asym master key */ 265 u8 old_asym_mkvp[16]; /* verify pattern of old asym master key */ 266 char serial[9]; /* serial number (8 ascii numbers + 0x00) */ 267 }; 268 269 /* 270 * Fetch cca information about an CCA queue. 271 */ 272 int cca_get_info(u16 card, u16 dom, struct cca_info *ci, int verify); 273 274 void zcrypt_ccamisc_exit(void); 275 276 #endif /* _ZCRYPT_CCAMISC_H_ */ 277