1 // SPDX-License-Identifier: GPL-2.0-or-later
17 	if (!dst || size > end - dst)  in dh_pack_data()
31 	return p->key_size + p->p_size + p->q_size + p->g_size;  in dh_data_size()
50 		return -EINVAL;  in crypto_dh_encode_key()
53 	ptr = dh_pack_data(ptr, end, &params->key_size,  in crypto_dh_encode_key()
54 			   sizeof(params->key_size));  in crypto_dh_encode_key()
55 	ptr = dh_pack_data(ptr, end, &params->p_size, sizeof(params->p_size));  in crypto_dh_encode_key()
56 	ptr = dh_pack_data(ptr, end, &params->q_size, sizeof(params->q_size));  in crypto_dh_encode_key()
57 	ptr = dh_pack_data(ptr, end, &params->g_size, sizeof(params->g_size));  in crypto_dh_encode_key()
58 	ptr = dh_pack_data(ptr, end, params->key, params->key_size);  in crypto_dh_encode_key()
59 	ptr = dh_pack_data(ptr, end, params->p, params->p_size);  in crypto_dh_encode_key()
60 	ptr = dh_pack_data(ptr, end, params->q, params->q_size);  in crypto_dh_encode_key()
61 	ptr = dh_pack_data(ptr, end, params->g, params->g_size);  in crypto_dh_encode_key()
63 		return -EINVAL;  in crypto_dh_encode_key()
74 		return -EINVAL;  in crypto_dh_decode_key()
78 		return -EINVAL;  in crypto_dh_decode_key()
80 	ptr = dh_unpack_data(&params->key_size, ptr, sizeof(params->key_size));  in crypto_dh_decode_key()
81 	ptr = dh_unpack_data(&params->p_size, ptr, sizeof(params->p_size));  in crypto_dh_decode_key()
82 	ptr = dh_unpack_data(&params->q_size, ptr, sizeof(params->q_size));  in crypto_dh_decode_key()
83 	ptr = dh_unpack_data(&params->g_size, ptr, sizeof(params->g_size));  in crypto_dh_decode_key()
85 		return -EINVAL;  in crypto_dh_decode_key()
88 	 * Don't permit the buffer for 'key' or 'g' to be larger than 'p', since  in crypto_dh_decode_key()
91 	if (params->key_size > params->p_size ||  in crypto_dh_decode_key()
92 	    params->g_size > params->p_size || params->q_size > params->p_size)  in crypto_dh_decode_key()
93 		return -EINVAL;  in crypto_dh_decode_key()
98 	params->key = (void *)ptr;  in crypto_dh_decode_key()
99 	params->p = (void *)(ptr + params->key_size);  in crypto_dh_decode_key()
100 	params->q = (void *)(ptr + params->key_size + params->p_size);  in crypto_dh_decode_key()
101 	params->g = (void *)(ptr + params->key_size + params->p_size +  in crypto_dh_decode_key()
102 			     params->q_size);  in crypto_dh_decode_key()
105 	 * Don't permit 'p' to be 0.  It's not a prime number, and it's subject  in crypto_dh_decode_key()
109 	if (memchr_inv(params->p, 0, params->p_size) == NULL)  in crypto_dh_decode_key()
110 		return -EINVAL;  in crypto_dh_decode_key()
113 	if (params->q_size == 0)  in crypto_dh_decode_key()
114 		params->q = NULL;  in crypto_dh_decode_key()