1ac2b96f3SHarald Freudenberger /* SPDX-License-Identifier: GPL-2.0+ */ 26684af1aSMartin Schwidefsky /* 3a53c8fabSHeiko Carstens * Copyright IBM Corp. 2001, 2006 46684af1aSMartin Schwidefsky * Author(s): Robert Burroughs 56684af1aSMartin Schwidefsky * Eric Rossman (edrossma@us.ibm.com) 66684af1aSMartin Schwidefsky * 76684af1aSMartin Schwidefsky * Hotplug & misc device support: Jochen Roehrig (roehrig@de.ibm.com) 86684af1aSMartin Schwidefsky * Major cleanup & driver split: Martin Schwidefsky <schwidefsky@de.ibm.com> 96684af1aSMartin Schwidefsky */ 106684af1aSMartin Schwidefsky 116684af1aSMartin Schwidefsky #ifndef _ZCRYPT_CCA_KEY_H_ 126684af1aSMartin Schwidefsky #define _ZCRYPT_CCA_KEY_H_ 136684af1aSMartin Schwidefsky 142004b57cSHarald Freudenberger struct t6_keyblock_hdr { 156684af1aSMartin Schwidefsky unsigned short blen; 166684af1aSMartin Schwidefsky unsigned short ulen; 176684af1aSMartin Schwidefsky unsigned short flags; 186684af1aSMartin Schwidefsky }; 196684af1aSMartin Schwidefsky 206684af1aSMartin Schwidefsky /** 216684af1aSMartin Schwidefsky * mapping for the cca private ME key token. 226684af1aSMartin Schwidefsky * Three parts of interest here: the header, the private section and 236684af1aSMartin Schwidefsky * the public section. 246684af1aSMartin Schwidefsky * 256684af1aSMartin Schwidefsky * mapping for the cca key token header 266684af1aSMartin Schwidefsky */ 276684af1aSMartin Schwidefsky struct cca_token_hdr { 286684af1aSMartin Schwidefsky unsigned char token_identifier; 296684af1aSMartin Schwidefsky unsigned char version; 306684af1aSMartin Schwidefsky unsigned short token_length; 316684af1aSMartin Schwidefsky unsigned char reserved[4]; 32ac2b96f3SHarald Freudenberger } __packed; 336684af1aSMartin Schwidefsky 346684af1aSMartin Schwidefsky #define CCA_TKN_HDR_ID_EXT 0x1E 356684af1aSMartin Schwidefsky 366684af1aSMartin Schwidefsky #define CCA_PVT_USAGE_ALL 0x80 376684af1aSMartin Schwidefsky 386684af1aSMartin Schwidefsky /** 396684af1aSMartin Schwidefsky * mapping for the cca public section 406684af1aSMartin Schwidefsky * In a private key, the modulus doesn't appear in the public 416684af1aSMartin Schwidefsky * section. So, an arbitrary public exponent of 0x010001 will be 426684af1aSMartin Schwidefsky * used, for a section length of 0x0F always. 436684af1aSMartin Schwidefsky */ 446684af1aSMartin Schwidefsky struct cca_public_sec { 456684af1aSMartin Schwidefsky unsigned char section_identifier; 466684af1aSMartin Schwidefsky unsigned char version; 476684af1aSMartin Schwidefsky unsigned short section_length; 486684af1aSMartin Schwidefsky unsigned char reserved[2]; 496684af1aSMartin Schwidefsky unsigned short exponent_len; 506684af1aSMartin Schwidefsky unsigned short modulus_bit_len; 516684af1aSMartin Schwidefsky unsigned short modulus_byte_len; /* In a private key, this is 0 */ 52ac2b96f3SHarald Freudenberger } __packed; 536684af1aSMartin Schwidefsky 546684af1aSMartin Schwidefsky /** 556684af1aSMartin Schwidefsky * mapping for the cca private CRT key 'token' 566684af1aSMartin Schwidefsky * The first three parts (the only parts considered in this release) 576684af1aSMartin Schwidefsky * are: the header, the private section and the public section. 586684af1aSMartin Schwidefsky * The header and public section are the same as for the 596684af1aSMartin Schwidefsky * struct cca_private_ext_ME 606684af1aSMartin Schwidefsky * 616684af1aSMartin Schwidefsky * Following the structure are the quantities p, q, dp, dq, u, pad, 626684af1aSMartin Schwidefsky * and modulus, in that order, where pad_len is the modulo 8 636684af1aSMartin Schwidefsky * complement of the residue modulo 8 of the sum of 646684af1aSMartin Schwidefsky * (p_len + q_len + dp_len + dq_len + u_len). 656684af1aSMartin Schwidefsky */ 662004b57cSHarald Freudenberger struct cca_pvt_ext_crt_sec { 676684af1aSMartin Schwidefsky unsigned char section_identifier; 686684af1aSMartin Schwidefsky unsigned char version; 696684af1aSMartin Schwidefsky unsigned short section_length; 706684af1aSMartin Schwidefsky unsigned char private_key_hash[20]; 716684af1aSMartin Schwidefsky unsigned char reserved1[4]; 726684af1aSMartin Schwidefsky unsigned char key_format; 736684af1aSMartin Schwidefsky unsigned char reserved2; 746684af1aSMartin Schwidefsky unsigned char key_name_hash[20]; 756684af1aSMartin Schwidefsky unsigned char key_use_flags[4]; 766684af1aSMartin Schwidefsky unsigned short p_len; 776684af1aSMartin Schwidefsky unsigned short q_len; 786684af1aSMartin Schwidefsky unsigned short dp_len; 796684af1aSMartin Schwidefsky unsigned short dq_len; 806684af1aSMartin Schwidefsky unsigned short u_len; 816684af1aSMartin Schwidefsky unsigned short mod_len; 826684af1aSMartin Schwidefsky unsigned char reserved3[4]; 836684af1aSMartin Schwidefsky unsigned short pad_len; 846684af1aSMartin Schwidefsky unsigned char reserved4[52]; 856684af1aSMartin Schwidefsky unsigned char confounder[8]; 86ac2b96f3SHarald Freudenberger } __packed; 876684af1aSMartin Schwidefsky 886684af1aSMartin Schwidefsky #define CCA_PVT_EXT_CRT_SEC_ID_PVT 0x08 896684af1aSMartin Schwidefsky #define CCA_PVT_EXT_CRT_SEC_FMT_CL 0x40 906684af1aSMartin Schwidefsky 916684af1aSMartin Schwidefsky /** 92*0f2d4feeSHarald Freudenberger * Set up private key fields of a type6 MEX message. 936684af1aSMartin Schwidefsky * 946684af1aSMartin Schwidefsky * @mex: pointer to user input data 956684af1aSMartin Schwidefsky * @p: pointer to memory area for the key 966684af1aSMartin Schwidefsky * 971fee9626SHarald Freudenberger * Returns the size of the key area or negative errno value. 986684af1aSMartin Schwidefsky */ 998ff34588SHeiko Carstens static inline int zcrypt_type6_mex_key_en(struct ica_rsa_modexpo *mex, void *p) 1006684af1aSMartin Schwidefsky { 1016684af1aSMartin Schwidefsky static struct cca_token_hdr static_pub_hdr = { 1026684af1aSMartin Schwidefsky .token_identifier = 0x1E, 1036684af1aSMartin Schwidefsky }; 1046684af1aSMartin Schwidefsky static struct cca_public_sec static_pub_sec = { 1056684af1aSMartin Schwidefsky .section_identifier = 0x04, 1066684af1aSMartin Schwidefsky }; 1076684af1aSMartin Schwidefsky struct { 1082004b57cSHarald Freudenberger struct t6_keyblock_hdr t6_hdr; 1092004b57cSHarald Freudenberger struct cca_token_hdr pubhdr; 1102004b57cSHarald Freudenberger struct cca_public_sec pubsec; 111*0f2d4feeSHarald Freudenberger char exponent[]; 112ac2b96f3SHarald Freudenberger } __packed *key = p; 113*0f2d4feeSHarald Freudenberger unsigned char *ptr; 1146684af1aSMartin Schwidefsky 1151fee9626SHarald Freudenberger /* 1161fee9626SHarald Freudenberger * The inputdatalength was a selection criteria in the dispatching 1171fee9626SHarald Freudenberger * function zcrypt_rsa_modexpo(). However, do a plausibility check 1181fee9626SHarald Freudenberger * here to make sure the following copy_from_user() can't be utilized 1191fee9626SHarald Freudenberger * to compromise the system. 1201fee9626SHarald Freudenberger */ 1211fee9626SHarald Freudenberger if (WARN_ON_ONCE(mex->inputdatalength > 512)) 1221fee9626SHarald Freudenberger return -EINVAL; 1231fee9626SHarald Freudenberger 1246684af1aSMartin Schwidefsky memset(key, 0, sizeof(*key)); 1256684af1aSMartin Schwidefsky 1262004b57cSHarald Freudenberger key->pubhdr = static_pub_hdr; 1272004b57cSHarald Freudenberger key->pubsec = static_pub_sec; 1286684af1aSMartin Schwidefsky 1296684af1aSMartin Schwidefsky /* key parameter block */ 130*0f2d4feeSHarald Freudenberger ptr = key->exponent; 131*0f2d4feeSHarald Freudenberger if (copy_from_user(ptr, mex->b_key, mex->inputdatalength)) 1326684af1aSMartin Schwidefsky return -EFAULT; 133*0f2d4feeSHarald Freudenberger ptr += mex->inputdatalength; 1346684af1aSMartin Schwidefsky /* modulus */ 135*0f2d4feeSHarald Freudenberger if (copy_from_user(ptr, mex->n_modulus, mex->inputdatalength)) 1366684af1aSMartin Schwidefsky return -EFAULT; 1376684af1aSMartin Schwidefsky 1382004b57cSHarald Freudenberger key->pubsec.modulus_bit_len = 8 * mex->inputdatalength; 1392004b57cSHarald Freudenberger key->pubsec.modulus_byte_len = mex->inputdatalength; 140*0f2d4feeSHarald Freudenberger key->pubsec.exponent_len = mex->inputdatalength; 1412004b57cSHarald Freudenberger key->pubsec.section_length = sizeof(key->pubsec) + 142*0f2d4feeSHarald Freudenberger 2 * mex->inputdatalength; 1432004b57cSHarald Freudenberger key->pubhdr.token_length = 1442004b57cSHarald Freudenberger key->pubsec.section_length + sizeof(key->pubhdr); 1452004b57cSHarald Freudenberger key->t6_hdr.ulen = key->pubhdr.token_length + 4; 1462004b57cSHarald Freudenberger key->t6_hdr.blen = key->pubhdr.token_length + 6; 147*0f2d4feeSHarald Freudenberger 148*0f2d4feeSHarald Freudenberger return sizeof(*key) + 2 * mex->inputdatalength; 1496684af1aSMartin Schwidefsky } 1506684af1aSMartin Schwidefsky 1516684af1aSMartin Schwidefsky /** 1526684af1aSMartin Schwidefsky * Set up private key fields of a type6 CRT message. 1536684af1aSMartin Schwidefsky * 1546684af1aSMartin Schwidefsky * @mex: pointer to user input data 1556684af1aSMartin Schwidefsky * @p: pointer to memory area for the key 1566684af1aSMartin Schwidefsky * 1576684af1aSMartin Schwidefsky * Returns the size of the key area or -EFAULT 1586684af1aSMartin Schwidefsky */ 1598ff34588SHeiko Carstens static inline int zcrypt_type6_crt_key(struct ica_rsa_modexpo_crt *crt, void *p) 1606684af1aSMartin Schwidefsky { 1616684af1aSMartin Schwidefsky static struct cca_public_sec static_cca_pub_sec = { 1626684af1aSMartin Schwidefsky .section_identifier = 4, 1636684af1aSMartin Schwidefsky .section_length = 0x000f, 1646684af1aSMartin Schwidefsky .exponent_len = 0x0003, 1656684af1aSMartin Schwidefsky }; 1666684af1aSMartin Schwidefsky static char pk_exponent[3] = { 0x01, 0x00, 0x01 }; 1676684af1aSMartin Schwidefsky struct { 1682004b57cSHarald Freudenberger struct t6_keyblock_hdr t6_hdr; 1696684af1aSMartin Schwidefsky struct cca_token_hdr token; 1702004b57cSHarald Freudenberger struct cca_pvt_ext_crt_sec pvt; 1716684af1aSMartin Schwidefsky char key_parts[0]; 172ac2b96f3SHarald Freudenberger } __packed *key = p; 1736684af1aSMartin Schwidefsky struct cca_public_sec *pub; 1746684af1aSMartin Schwidefsky int short_len, long_len, pad_len, key_len, size; 1756684af1aSMartin Schwidefsky 1761fee9626SHarald Freudenberger /* 1771fee9626SHarald Freudenberger * The inputdatalength was a selection criteria in the dispatching 1781fee9626SHarald Freudenberger * function zcrypt_rsa_crt(). However, do a plausibility check 1791fee9626SHarald Freudenberger * here to make sure the following copy_from_user() can't be utilized 1801fee9626SHarald Freudenberger * to compromise the system. 1811fee9626SHarald Freudenberger */ 1821fee9626SHarald Freudenberger if (WARN_ON_ONCE(crt->inputdatalength > 512)) 1831fee9626SHarald Freudenberger return -EINVAL; 1841fee9626SHarald Freudenberger 1856684af1aSMartin Schwidefsky memset(key, 0, sizeof(*key)); 1866684af1aSMartin Schwidefsky 1871330a125SIngo Tuchscherer short_len = (crt->inputdatalength + 1) / 2; 1886684af1aSMartin Schwidefsky long_len = short_len + 8; 1896684af1aSMartin Schwidefsky pad_len = -(3 * long_len + 2 * short_len) & 7; 1906684af1aSMartin Schwidefsky key_len = 3 * long_len + 2 * short_len + pad_len + crt->inputdatalength; 1916684af1aSMartin Schwidefsky size = sizeof(*key) + key_len + sizeof(*pub) + 3; 1926684af1aSMartin Schwidefsky 1936684af1aSMartin Schwidefsky /* parameter block.key block */ 1948ff34588SHeiko Carstens key->t6_hdr.blen = size; 1958ff34588SHeiko Carstens key->t6_hdr.ulen = size - 2; 1966684af1aSMartin Schwidefsky 1976684af1aSMartin Schwidefsky /* key token header */ 1986684af1aSMartin Schwidefsky key->token.token_identifier = CCA_TKN_HDR_ID_EXT; 1996684af1aSMartin Schwidefsky key->token.token_length = size - 6; 2006684af1aSMartin Schwidefsky 2016684af1aSMartin Schwidefsky /* private section */ 2026684af1aSMartin Schwidefsky key->pvt.section_identifier = CCA_PVT_EXT_CRT_SEC_ID_PVT; 2036684af1aSMartin Schwidefsky key->pvt.section_length = sizeof(key->pvt) + key_len; 2046684af1aSMartin Schwidefsky key->pvt.key_format = CCA_PVT_EXT_CRT_SEC_FMT_CL; 2056684af1aSMartin Schwidefsky key->pvt.key_use_flags[0] = CCA_PVT_USAGE_ALL; 2066684af1aSMartin Schwidefsky key->pvt.p_len = key->pvt.dp_len = key->pvt.u_len = long_len; 2076684af1aSMartin Schwidefsky key->pvt.q_len = key->pvt.dq_len = short_len; 2086684af1aSMartin Schwidefsky key->pvt.mod_len = crt->inputdatalength; 2096684af1aSMartin Schwidefsky key->pvt.pad_len = pad_len; 2106684af1aSMartin Schwidefsky 2116684af1aSMartin Schwidefsky /* key parts */ 2126684af1aSMartin Schwidefsky if (copy_from_user(key->key_parts, crt->np_prime, long_len) || 2136684af1aSMartin Schwidefsky copy_from_user(key->key_parts + long_len, 2146684af1aSMartin Schwidefsky crt->nq_prime, short_len) || 2156684af1aSMartin Schwidefsky copy_from_user(key->key_parts + long_len + short_len, 2166684af1aSMartin Schwidefsky crt->bp_key, long_len) || 2176684af1aSMartin Schwidefsky copy_from_user(key->key_parts + 2 * long_len + short_len, 2186684af1aSMartin Schwidefsky crt->bq_key, short_len) || 2196684af1aSMartin Schwidefsky copy_from_user(key->key_parts + 2 * long_len + 2 * short_len, 2206684af1aSMartin Schwidefsky crt->u_mult_inv, long_len)) 2216684af1aSMartin Schwidefsky return -EFAULT; 2226684af1aSMartin Schwidefsky memset(key->key_parts + 3 * long_len + 2 * short_len + pad_len, 2236684af1aSMartin Schwidefsky 0xff, crt->inputdatalength); 2246684af1aSMartin Schwidefsky pub = (struct cca_public_sec *)(key->key_parts + key_len); 2256684af1aSMartin Schwidefsky *pub = static_cca_pub_sec; 2266684af1aSMartin Schwidefsky pub->modulus_bit_len = 8 * crt->inputdatalength; 2271749a81dSFelix Beck /* 2286684af1aSMartin Schwidefsky * In a private key, the modulus doesn't appear in the public 2296684af1aSMartin Schwidefsky * section. So, an arbitrary public exponent of 0x010001 will be 2306684af1aSMartin Schwidefsky * used. 2316684af1aSMartin Schwidefsky */ 2326684af1aSMartin Schwidefsky memcpy((char *)(pub + 1), pk_exponent, 3); 233*0f2d4feeSHarald Freudenberger 2346684af1aSMartin Schwidefsky return size; 2356684af1aSMartin Schwidefsky } 2366684af1aSMartin Schwidefsky 2376684af1aSMartin Schwidefsky #endif /* _ZCRYPT_CCA_KEY_H_ */ 238