1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2018 Intel Corporation
10 * Contains crypto specific functions/structures/macros used internally
15 * AES-CTR counter block format.
18 struct aesctr_cnt_blk {
25 * AES-GCM devices have some specific requirements for IV and AAD formats.
26 * Ideally that to be done by the driver itself.
38 * RFC 4106, section 5:
39 * Two formats of the AAD are defined:
40 * one for 32-bit sequence numbers, and one for 64-bit ESN.
46 uint32_t align0; /* align to 16B boundary */
50 struct rte_esp_hdr esph;
55 aes_ctr_cnt_blk_fill(struct aesctr_cnt_blk *ctr, uint64_t iv, uint32_t nonce)
59 ctr->cnt = rte_cpu_to_be_32(1);
63 aead_gcm_iv_fill(struct aead_gcm_iv *gcm, uint64_t iv, uint32_t salt)
67 gcm->cnt = rte_cpu_to_be_32(1);
71 * RFC 4106, 5 AAD Construction
72 * spi and sqn should already be converted into network byte order.
73 * Make sure that not used bytes are zeroed.
76 aead_gcm_aad_fill(struct aead_gcm_aad *aad, rte_be32_t spi, rte_be64_t sqn,
83 aad->sqn.u32[0] = sqn_low32(sqn);
90 gen_iv(uint64_t iv[IPSEC_MAX_IV_QWORD], rte_be64_t sqn)
97 * Helper routine to copy IV
98 * Right now we support only algorithms with IV length equals 0/8/16 bytes.
101 copy_iv(uint64_t dst[IPSEC_MAX_IV_QWORD],
102 const uint64_t src[IPSEC_MAX_IV_QWORD], uint32_t len)
104 RTE_BUILD_BUG_ON(IPSEC_MAX_IV_SIZE != 2 * sizeof(uint64_t));
107 case IPSEC_MAX_IV_SIZE:
110 case sizeof(uint64_t):
116 /* should never happen */
122 * from RFC 4303 3.3.2.1.4:
123 * If the ESN option is enabled for the SA, the high-order 32
124 * bits of the sequence number are appended after the Next Header field
125 * for purposes of this computation, but are not transmitted.
129 * Helper function that moves ICV by 4B below, and inserts SQN.hibits.
130 * icv parameter points to the new start of ICV.
133 insert_sqh(uint32_t sqh, void *picv, uint32_t icv_len)
138 RTE_ASSERT(icv_len % sizeof(uint32_t) == 0);
141 icv_len = icv_len / sizeof(uint32_t);
142 for (i = icv_len; i-- != 0; icv[i] = icv[i - 1])
149 * Helper function that moves ICV by 4B up, and removes SQN.hibits.
150 * icv parameter points to the new start of ICV.
153 remove_sqh(void *picv, uint32_t icv_len)
157 RTE_ASSERT(icv_len % sizeof(uint32_t) == 0);
160 icv_len = icv_len / sizeof(uint32_t);
161 for (i = 0; i != icv_len; i++)
166 * setup crypto ops for LOOKASIDE_NONE (pure crypto) type of devices.
169 lksd_none_cop_prepare(struct rte_crypto_op *cop,
170 struct rte_cryptodev_sym_session *cs, struct rte_mbuf *mb)
172 struct rte_crypto_sym_op *sop;
175 cop->type = RTE_CRYPTO_OP_TYPE_SYMMETRIC;
176 cop->status = RTE_CRYPTO_OP_STATUS_NOT_PROCESSED;
177 cop->sess_type = RTE_CRYPTO_OP_WITH_SESSION;
179 __rte_crypto_sym_op_attach_sym_session(sop, cs);
182 #endif /* _CRYPTO_H_ */