1 /* SPDX-License-Identifier: GPL-2.0+ */
21  * mapping for the cca private ME key token.
25  * mapping for the cca key token header
40  * In a private key, the modulus doesn't appear in the public
51 	unsigned short modulus_byte_len;    /* In a private key, this is 0 */
55  * mapping for the cca private CRT key 'token'
92  * Set up private key fields of a type6 MEX message.
95  * @p: pointer to memory area for the key
97  * Returns the size of the key area or negative errno value.
112 	} __packed *key = p;  in zcrypt_type6_mex_key_en()  local
121 	if (WARN_ON_ONCE(mex->inputdatalength > 512))  in zcrypt_type6_mex_key_en()
122 		return -EINVAL;  in zcrypt_type6_mex_key_en()
124 	memset(key, 0, sizeof(*key));  in zcrypt_type6_mex_key_en()
126 	key->pubhdr = static_pub_hdr;  in zcrypt_type6_mex_key_en()
127 	key->pubsec = static_pub_sec;  in zcrypt_type6_mex_key_en()
129 	/* key parameter block */  in zcrypt_type6_mex_key_en()
130 	ptr = key->exponent;  in zcrypt_type6_mex_key_en()
131 	if (copy_from_user(ptr, mex->b_key, mex->inputdatalength))  in zcrypt_type6_mex_key_en()
132 		return -EFAULT;  in zcrypt_type6_mex_key_en()
133 	ptr += mex->inputdatalength;  in zcrypt_type6_mex_key_en()
135 	if (copy_from_user(ptr, mex->n_modulus, mex->inputdatalength))  in zcrypt_type6_mex_key_en()
136 		return -EFAULT;  in zcrypt_type6_mex_key_en()
138 	key->pubsec.modulus_bit_len = 8 * mex->inputdatalength;  in zcrypt_type6_mex_key_en()
139 	key->pubsec.modulus_byte_len = mex->inputdatalength;  in zcrypt_type6_mex_key_en()
140 	key->pubsec.exponent_len = mex->inputdatalength;  in zcrypt_type6_mex_key_en()
141 	key->pubsec.section_length = sizeof(key->pubsec) +  in zcrypt_type6_mex_key_en()
142 					2 * mex->inputdatalength;  in zcrypt_type6_mex_key_en()
143 	key->pubhdr.token_length =  in zcrypt_type6_mex_key_en()
144 		key->pubsec.section_length + sizeof(key->pubhdr);  in zcrypt_type6_mex_key_en()
145 	key->t6_hdr.ulen = key->pubhdr.token_length + 4;  in zcrypt_type6_mex_key_en()
146 	key->t6_hdr.blen = key->pubhdr.token_length + 6;  in zcrypt_type6_mex_key_en()
148 	return sizeof(*key) + 2 * mex->inputdatalength;  in zcrypt_type6_mex_key_en()
152  * Set up private key fields of a type6 CRT message.
155  * @p: pointer to memory area for the key
157  * Returns the size of the key area or -EFAULT
172 	} __packed *key = p;  in zcrypt_type6_crt_key()  local
182 	if (WARN_ON_ONCE(crt->inputdatalength > 512))  in zcrypt_type6_crt_key()
183 		return -EINVAL;  in zcrypt_type6_crt_key()
185 	memset(key, 0, sizeof(*key));  in zcrypt_type6_crt_key()
187 	short_len = (crt->inputdatalength + 1) / 2;  in zcrypt_type6_crt_key()
189 	pad_len = -(3 * long_len + 2 * short_len) & 7;  in zcrypt_type6_crt_key()
190 	key_len = 3 * long_len + 2 * short_len + pad_len + crt->inputdatalength;  in zcrypt_type6_crt_key()
191 	size = sizeof(*key) + key_len + sizeof(*pub) + 3;  in zcrypt_type6_crt_key()
193 	/* parameter block.key block */  in zcrypt_type6_crt_key()
194 	key->t6_hdr.blen = size;  in zcrypt_type6_crt_key()
195 	key->t6_hdr.ulen = size - 2;  in zcrypt_type6_crt_key()
197 	/* key token header */  in zcrypt_type6_crt_key()
198 	key->token.token_identifier = CCA_TKN_HDR_ID_EXT;  in zcrypt_type6_crt_key()
199 	key->token.token_length = size - 6;  in zcrypt_type6_crt_key()
202 	key->pvt.section_identifier = CCA_PVT_EXT_CRT_SEC_ID_PVT;  in zcrypt_type6_crt_key()
203 	key->pvt.section_length = sizeof(key->pvt) + key_len;  in zcrypt_type6_crt_key()
204 	key->pvt.key_format = CCA_PVT_EXT_CRT_SEC_FMT_CL;  in zcrypt_type6_crt_key()
205 	key->pvt.key_use_flags[0] = CCA_PVT_USAGE_ALL;  in zcrypt_type6_crt_key()
206 	key->pvt.p_len = key->pvt.dp_len = key->pvt.u_len = long_len;  in zcrypt_type6_crt_key()
207 	key->pvt.q_len = key->pvt.dq_len = short_len;  in zcrypt_type6_crt_key()
208 	key->pvt.mod_len = crt->inputdatalength;  in zcrypt_type6_crt_key()
209 	key->pvt.pad_len = pad_len;  in zcrypt_type6_crt_key()
211 	/* key parts */  in zcrypt_type6_crt_key()
212 	if (copy_from_user(key->key_parts, crt->np_prime, long_len) ||  in zcrypt_type6_crt_key()
213 	    copy_from_user(key->key_parts + long_len,  in zcrypt_type6_crt_key()
214 			   crt->nq_prime, short_len) ||  in zcrypt_type6_crt_key()
215 	    copy_from_user(key->key_parts + long_len + short_len,  in zcrypt_type6_crt_key()
216 			   crt->bp_key, long_len) ||  in zcrypt_type6_crt_key()
217 	    copy_from_user(key->key_parts + 2 * long_len + short_len,  in zcrypt_type6_crt_key()
218 			   crt->bq_key, short_len) ||  in zcrypt_type6_crt_key()
219 	    copy_from_user(key->key_parts + 2 * long_len + 2 * short_len,  in zcrypt_type6_crt_key()
220 			   crt->u_mult_inv, long_len))  in zcrypt_type6_crt_key()
221 		return -EFAULT;  in zcrypt_type6_crt_key()
222 	memset(key->key_parts + 3 * long_len + 2 * short_len + pad_len,  in zcrypt_type6_crt_key()
223 	       0xff, crt->inputdatalength);  in zcrypt_type6_crt_key()
224 	pub = (struct cca_public_sec *)(key->key_parts + key_len);  in zcrypt_type6_crt_key()
226 	pub->modulus_bit_len = 8 * crt->inputdatalength;  in zcrypt_type6_crt_key()
228 	 * In a private key, the modulus doesn't appear in the public  in zcrypt_type6_crt_key()