diff options
Diffstat (limited to 'drivers/crypto/amcc/crypto4xx_alg.c')
| -rw-r--r-- | drivers/crypto/amcc/crypto4xx_alg.c | 721 |
1 files changed, 721 insertions, 0 deletions
diff --git a/drivers/crypto/amcc/crypto4xx_alg.c b/drivers/crypto/amcc/crypto4xx_alg.c new file mode 100644 index 0000000000..ded7322427 --- /dev/null +++ b/drivers/crypto/amcc/crypto4xx_alg.c @@ -0,0 +1,721 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * AMCC SoC PPC4xx Crypto Driver + * + * Copyright (c) 2008 Applied Micro Circuits Corporation. + * All rights reserved. James Hsiao <jhsiao@amcc.com> + * + * This file implements the Linux crypto algorithms. + */ + +#include <linux/kernel.h> +#include <linux/interrupt.h> +#include <linux/spinlock_types.h> +#include <linux/scatterlist.h> +#include <linux/crypto.h> +#include <linux/hash.h> +#include <crypto/internal/hash.h> +#include <linux/dma-mapping.h> +#include <crypto/algapi.h> +#include <crypto/aead.h> +#include <crypto/aes.h> +#include <crypto/gcm.h> +#include <crypto/sha1.h> +#include <crypto/ctr.h> +#include <crypto/skcipher.h> +#include "crypto4xx_reg_def.h" +#include "crypto4xx_core.h" +#include "crypto4xx_sa.h" + +static void set_dynamic_sa_command_0(struct dynamic_sa_ctl *sa, u32 save_h, + u32 save_iv, u32 ld_h, u32 ld_iv, + u32 hdr_proc, u32 h, u32 c, u32 pad_type, + u32 op_grp, u32 op, u32 dir) +{ + sa->sa_command_0.w = 0; + sa->sa_command_0.bf.save_hash_state = save_h; + sa->sa_command_0.bf.save_iv = save_iv; + sa->sa_command_0.bf.load_hash_state = ld_h; + sa->sa_command_0.bf.load_iv = ld_iv; + sa->sa_command_0.bf.hdr_proc = hdr_proc; + sa->sa_command_0.bf.hash_alg = h; + sa->sa_command_0.bf.cipher_alg = c; + sa->sa_command_0.bf.pad_type = pad_type & 3; + sa->sa_command_0.bf.extend_pad = pad_type >> 2; + sa->sa_command_0.bf.op_group = op_grp; + sa->sa_command_0.bf.opcode = op; + sa->sa_command_0.bf.dir = dir; +} + +static void set_dynamic_sa_command_1(struct dynamic_sa_ctl *sa, u32 cm, + u32 hmac_mc, u32 cfb, u32 esn, + u32 sn_mask, u32 mute, u32 cp_pad, + u32 cp_pay, u32 cp_hdr) +{ + sa->sa_command_1.w = 0; + sa->sa_command_1.bf.crypto_mode31 = (cm & 4) >> 2; + sa->sa_command_1.bf.crypto_mode9_8 = cm & 3; + sa->sa_command_1.bf.feedback_mode = cfb; + sa->sa_command_1.bf.sa_rev = 1; + sa->sa_command_1.bf.hmac_muting = hmac_mc; + sa->sa_command_1.bf.extended_seq_num = esn; + sa->sa_command_1.bf.seq_num_mask = sn_mask; + sa->sa_command_1.bf.mutable_bit_proc = mute; + sa->sa_command_1.bf.copy_pad = cp_pad; + sa->sa_command_1.bf.copy_payload = cp_pay; + sa->sa_command_1.bf.copy_hdr = cp_hdr; +} + +static inline int crypto4xx_crypt(struct skcipher_request *req, + const unsigned int ivlen, bool decrypt, + bool check_blocksize) +{ + struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req); + struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); + __le32 iv[AES_IV_SIZE]; + + if (check_blocksize && !IS_ALIGNED(req->cryptlen, AES_BLOCK_SIZE)) + return -EINVAL; + + if (ivlen) + crypto4xx_memcpy_to_le32(iv, req->iv, ivlen); + + return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, + req->cryptlen, iv, ivlen, decrypt ? ctx->sa_in : ctx->sa_out, + ctx->sa_len, 0, NULL); +} + +int crypto4xx_encrypt_noiv_block(struct skcipher_request *req) +{ + return crypto4xx_crypt(req, 0, false, true); +} + +int crypto4xx_encrypt_iv_stream(struct skcipher_request *req) +{ + return crypto4xx_crypt(req, AES_IV_SIZE, false, false); +} + +int crypto4xx_decrypt_noiv_block(struct skcipher_request *req) +{ + return crypto4xx_crypt(req, 0, true, true); +} + +int crypto4xx_decrypt_iv_stream(struct skcipher_request *req) +{ + return crypto4xx_crypt(req, AES_IV_SIZE, true, false); +} + +int crypto4xx_encrypt_iv_block(struct skcipher_request *req) +{ + return crypto4xx_crypt(req, AES_IV_SIZE, false, true); +} + +int crypto4xx_decrypt_iv_block(struct skcipher_request *req) +{ + return crypto4xx_crypt(req, AES_IV_SIZE, true, true); +} + +/* + * AES Functions + */ +static int crypto4xx_setkey_aes(struct crypto_skcipher *cipher, + const u8 *key, + unsigned int keylen, + unsigned char cm, + u8 fb) +{ + struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); + struct dynamic_sa_ctl *sa; + int rc; + + if (keylen != AES_KEYSIZE_256 && keylen != AES_KEYSIZE_192 && + keylen != AES_KEYSIZE_128) + return -EINVAL; + + /* Create SA */ + if (ctx->sa_in || ctx->sa_out) + crypto4xx_free_sa(ctx); + + rc = crypto4xx_alloc_sa(ctx, SA_AES128_LEN + (keylen-16) / 4); + if (rc) + return rc; + + /* Setup SA */ + sa = ctx->sa_in; + + set_dynamic_sa_command_0(sa, SA_NOT_SAVE_HASH, (cm == CRYPTO_MODE_ECB ? + SA_NOT_SAVE_IV : SA_SAVE_IV), + SA_NOT_LOAD_HASH, (cm == CRYPTO_MODE_ECB ? + SA_LOAD_IV_FROM_SA : SA_LOAD_IV_FROM_STATE), + SA_NO_HEADER_PROC, SA_HASH_ALG_NULL, + SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO, + SA_OP_GROUP_BASIC, SA_OPCODE_DECRYPT, + DIR_INBOUND); + + set_dynamic_sa_command_1(sa, cm, SA_HASH_MODE_HASH, + fb, SA_EXTENDED_SN_OFF, + SA_SEQ_MASK_OFF, SA_MC_ENABLE, + SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD, + SA_NOT_COPY_HDR); + crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), + key, keylen); + sa->sa_contents.w = SA_AES_CONTENTS | (keylen << 2); + sa->sa_command_1.bf.key_len = keylen >> 3; + + memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4); + sa = ctx->sa_out; + sa->sa_command_0.bf.dir = DIR_OUTBOUND; + /* + * SA_OPCODE_ENCRYPT is the same value as SA_OPCODE_DECRYPT. + * it's the DIR_(IN|OUT)BOUND that matters + */ + sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT; + + return 0; +} + +int crypto4xx_setkey_aes_cbc(struct crypto_skcipher *cipher, + const u8 *key, unsigned int keylen) +{ + return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CBC, + CRYPTO_FEEDBACK_MODE_NO_FB); +} + +int crypto4xx_setkey_aes_cfb(struct crypto_skcipher *cipher, + const u8 *key, unsigned int keylen) +{ + return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_CFB, + CRYPTO_FEEDBACK_MODE_128BIT_CFB); +} + +int crypto4xx_setkey_aes_ecb(struct crypto_skcipher *cipher, + const u8 *key, unsigned int keylen) +{ + return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_ECB, + CRYPTO_FEEDBACK_MODE_NO_FB); +} + +int crypto4xx_setkey_aes_ofb(struct crypto_skcipher *cipher, + const u8 *key, unsigned int keylen) +{ + return crypto4xx_setkey_aes(cipher, key, keylen, CRYPTO_MODE_OFB, + CRYPTO_FEEDBACK_MODE_64BIT_OFB); +} + +int crypto4xx_setkey_rfc3686(struct crypto_skcipher *cipher, + const u8 *key, unsigned int keylen) +{ + struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); + int rc; + + rc = crypto4xx_setkey_aes(cipher, key, keylen - CTR_RFC3686_NONCE_SIZE, + CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB); + if (rc) + return rc; + + ctx->iv_nonce = cpu_to_le32p((u32 *)&key[keylen - + CTR_RFC3686_NONCE_SIZE]); + + return 0; +} + +int crypto4xx_rfc3686_encrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req); + struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); + __le32 iv[AES_IV_SIZE / 4] = { + ctx->iv_nonce, + cpu_to_le32p((u32 *) req->iv), + cpu_to_le32p((u32 *) (req->iv + 4)), + cpu_to_le32(1) }; + + return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, + req->cryptlen, iv, AES_IV_SIZE, + ctx->sa_out, ctx->sa_len, 0, NULL); +} + +int crypto4xx_rfc3686_decrypt(struct skcipher_request *req) +{ + struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req); + struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); + __le32 iv[AES_IV_SIZE / 4] = { + ctx->iv_nonce, + cpu_to_le32p((u32 *) req->iv), + cpu_to_le32p((u32 *) (req->iv + 4)), + cpu_to_le32(1) }; + + return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, + req->cryptlen, iv, AES_IV_SIZE, + ctx->sa_out, ctx->sa_len, 0, NULL); +} + +static int +crypto4xx_ctr_crypt(struct skcipher_request *req, bool encrypt) +{ + struct crypto_skcipher *cipher = crypto_skcipher_reqtfm(req); + struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); + size_t iv_len = crypto_skcipher_ivsize(cipher); + unsigned int counter = be32_to_cpup((__be32 *)(req->iv + iv_len - 4)); + unsigned int nblks = ALIGN(req->cryptlen, AES_BLOCK_SIZE) / + AES_BLOCK_SIZE; + + /* + * The hardware uses only the last 32-bits as the counter while the + * kernel tests (aes_ctr_enc_tv_template[4] for example) expect that + * the whole IV is a counter. So fallback if the counter is going to + * overlow. + */ + if (counter + nblks < counter) { + SYNC_SKCIPHER_REQUEST_ON_STACK(subreq, ctx->sw_cipher.cipher); + int ret; + + skcipher_request_set_sync_tfm(subreq, ctx->sw_cipher.cipher); + skcipher_request_set_callback(subreq, req->base.flags, + NULL, NULL); + skcipher_request_set_crypt(subreq, req->src, req->dst, + req->cryptlen, req->iv); + ret = encrypt ? crypto_skcipher_encrypt(subreq) + : crypto_skcipher_decrypt(subreq); + skcipher_request_zero(subreq); + return ret; + } + + return encrypt ? crypto4xx_encrypt_iv_stream(req) + : crypto4xx_decrypt_iv_stream(req); +} + +static int crypto4xx_sk_setup_fallback(struct crypto4xx_ctx *ctx, + struct crypto_skcipher *cipher, + const u8 *key, + unsigned int keylen) +{ + crypto_sync_skcipher_clear_flags(ctx->sw_cipher.cipher, + CRYPTO_TFM_REQ_MASK); + crypto_sync_skcipher_set_flags(ctx->sw_cipher.cipher, + crypto_skcipher_get_flags(cipher) & CRYPTO_TFM_REQ_MASK); + return crypto_sync_skcipher_setkey(ctx->sw_cipher.cipher, key, keylen); +} + +int crypto4xx_setkey_aes_ctr(struct crypto_skcipher *cipher, + const u8 *key, unsigned int keylen) +{ + struct crypto4xx_ctx *ctx = crypto_skcipher_ctx(cipher); + int rc; + + rc = crypto4xx_sk_setup_fallback(ctx, cipher, key, keylen); + if (rc) + return rc; + + return crypto4xx_setkey_aes(cipher, key, keylen, + CRYPTO_MODE_CTR, CRYPTO_FEEDBACK_MODE_NO_FB); +} + +int crypto4xx_encrypt_ctr(struct skcipher_request *req) +{ + return crypto4xx_ctr_crypt(req, true); +} + +int crypto4xx_decrypt_ctr(struct skcipher_request *req) +{ + return crypto4xx_ctr_crypt(req, false); +} + +static inline bool crypto4xx_aead_need_fallback(struct aead_request *req, + unsigned int len, + bool is_ccm, bool decrypt) +{ + struct crypto_aead *aead = crypto_aead_reqtfm(req); + + /* authsize has to be a multiple of 4 */ + if (aead->authsize & 3) + return true; + + /* + * hardware does not handle cases where plaintext + * is less than a block. + */ + if (len < AES_BLOCK_SIZE) + return true; + + /* assoc len needs to be a multiple of 4 and <= 1020 */ + if (req->assoclen & 0x3 || req->assoclen > 1020) + return true; + + /* CCM supports only counter field length of 2 and 4 bytes */ + if (is_ccm && !(req->iv[0] == 1 || req->iv[0] == 3)) + return true; + + return false; +} + +static int crypto4xx_aead_fallback(struct aead_request *req, + struct crypto4xx_ctx *ctx, bool do_decrypt) +{ + struct aead_request *subreq = aead_request_ctx(req); + + aead_request_set_tfm(subreq, ctx->sw_cipher.aead); + aead_request_set_callback(subreq, req->base.flags, + req->base.complete, req->base.data); + aead_request_set_crypt(subreq, req->src, req->dst, req->cryptlen, + req->iv); + aead_request_set_ad(subreq, req->assoclen); + return do_decrypt ? crypto_aead_decrypt(subreq) : + crypto_aead_encrypt(subreq); +} + +static int crypto4xx_aead_setup_fallback(struct crypto4xx_ctx *ctx, + struct crypto_aead *cipher, + const u8 *key, + unsigned int keylen) +{ + crypto_aead_clear_flags(ctx->sw_cipher.aead, CRYPTO_TFM_REQ_MASK); + crypto_aead_set_flags(ctx->sw_cipher.aead, + crypto_aead_get_flags(cipher) & CRYPTO_TFM_REQ_MASK); + return crypto_aead_setkey(ctx->sw_cipher.aead, key, keylen); +} + +/* + * AES-CCM Functions + */ + +int crypto4xx_setkey_aes_ccm(struct crypto_aead *cipher, const u8 *key, + unsigned int keylen) +{ + struct crypto_tfm *tfm = crypto_aead_tfm(cipher); + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); + struct dynamic_sa_ctl *sa; + int rc = 0; + + rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen); + if (rc) + return rc; + + if (ctx->sa_in || ctx->sa_out) + crypto4xx_free_sa(ctx); + + rc = crypto4xx_alloc_sa(ctx, SA_AES128_CCM_LEN + (keylen - 16) / 4); + if (rc) + return rc; + + /* Setup SA */ + sa = (struct dynamic_sa_ctl *) ctx->sa_in; + sa->sa_contents.w = SA_AES_CCM_CONTENTS | (keylen << 2); + + set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV, + SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE, + SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC, + SA_CIPHER_ALG_AES, + SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC, + SA_OPCODE_HASH_DECRYPT, DIR_INBOUND); + + set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH, + CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF, + SA_SEQ_MASK_OFF, SA_MC_ENABLE, + SA_NOT_COPY_PAD, SA_COPY_PAYLOAD, + SA_NOT_COPY_HDR); + + sa->sa_command_1.bf.key_len = keylen >> 3; + + crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), key, keylen); + + memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4); + sa = (struct dynamic_sa_ctl *) ctx->sa_out; + + set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV, + SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE, + SA_NO_HEADER_PROC, SA_HASH_ALG_CBC_MAC, + SA_CIPHER_ALG_AES, + SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC, + SA_OPCODE_ENCRYPT_HASH, DIR_OUTBOUND); + + set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH, + CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF, + SA_SEQ_MASK_OFF, SA_MC_ENABLE, + SA_COPY_PAD, SA_COPY_PAYLOAD, + SA_NOT_COPY_HDR); + + sa->sa_command_1.bf.key_len = keylen >> 3; + return 0; +} + +static int crypto4xx_crypt_aes_ccm(struct aead_request *req, bool decrypt) +{ + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); + struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req); + struct crypto_aead *aead = crypto_aead_reqtfm(req); + __le32 iv[16]; + u32 tmp_sa[SA_AES128_CCM_LEN + 4]; + struct dynamic_sa_ctl *sa = (struct dynamic_sa_ctl *)tmp_sa; + unsigned int len = req->cryptlen; + + if (decrypt) + len -= crypto_aead_authsize(aead); + + if (crypto4xx_aead_need_fallback(req, len, true, decrypt)) + return crypto4xx_aead_fallback(req, ctx, decrypt); + + memcpy(tmp_sa, decrypt ? ctx->sa_in : ctx->sa_out, ctx->sa_len * 4); + sa->sa_command_0.bf.digest_len = crypto_aead_authsize(aead) >> 2; + + if (req->iv[0] == 1) { + /* CRYPTO_MODE_AES_ICM */ + sa->sa_command_1.bf.crypto_mode9_8 = 1; + } + + iv[3] = cpu_to_le32(0); + crypto4xx_memcpy_to_le32(iv, req->iv, 16 - (req->iv[0] + 1)); + + return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, + len, iv, sizeof(iv), + sa, ctx->sa_len, req->assoclen, rctx->dst); +} + +int crypto4xx_encrypt_aes_ccm(struct aead_request *req) +{ + return crypto4xx_crypt_aes_ccm(req, false); +} + +int crypto4xx_decrypt_aes_ccm(struct aead_request *req) +{ + return crypto4xx_crypt_aes_ccm(req, true); +} + +int crypto4xx_setauthsize_aead(struct crypto_aead *cipher, + unsigned int authsize) +{ + struct crypto_tfm *tfm = crypto_aead_tfm(cipher); + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); + + return crypto_aead_setauthsize(ctx->sw_cipher.aead, authsize); +} + +/* + * AES-GCM Functions + */ + +static int crypto4xx_aes_gcm_validate_keylen(unsigned int keylen) +{ + switch (keylen) { + case 16: + case 24: + case 32: + return 0; + default: + return -EINVAL; + } +} + +static int crypto4xx_compute_gcm_hash_key_sw(__le32 *hash_start, const u8 *key, + unsigned int keylen) +{ + struct crypto_aes_ctx ctx; + uint8_t src[16] = { 0 }; + int rc; + + rc = aes_expandkey(&ctx, key, keylen); + if (rc) { + pr_err("aes_expandkey() failed: %d\n", rc); + return rc; + } + + aes_encrypt(&ctx, src, src); + crypto4xx_memcpy_to_le32(hash_start, src, 16); + memzero_explicit(&ctx, sizeof(ctx)); + return 0; +} + +int crypto4xx_setkey_aes_gcm(struct crypto_aead *cipher, + const u8 *key, unsigned int keylen) +{ + struct crypto_tfm *tfm = crypto_aead_tfm(cipher); + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); + struct dynamic_sa_ctl *sa; + int rc = 0; + + if (crypto4xx_aes_gcm_validate_keylen(keylen) != 0) + return -EINVAL; + + rc = crypto4xx_aead_setup_fallback(ctx, cipher, key, keylen); + if (rc) + return rc; + + if (ctx->sa_in || ctx->sa_out) + crypto4xx_free_sa(ctx); + + rc = crypto4xx_alloc_sa(ctx, SA_AES128_GCM_LEN + (keylen - 16) / 4); + if (rc) + return rc; + + sa = (struct dynamic_sa_ctl *) ctx->sa_in; + + sa->sa_contents.w = SA_AES_GCM_CONTENTS | (keylen << 2); + set_dynamic_sa_command_0(sa, SA_SAVE_HASH, SA_NOT_SAVE_IV, + SA_LOAD_HASH_FROM_SA, SA_LOAD_IV_FROM_STATE, + SA_NO_HEADER_PROC, SA_HASH_ALG_GHASH, + SA_CIPHER_ALG_AES, SA_PAD_TYPE_ZERO, + SA_OP_GROUP_BASIC, SA_OPCODE_HASH_DECRYPT, + DIR_INBOUND); + set_dynamic_sa_command_1(sa, CRYPTO_MODE_CTR, SA_HASH_MODE_HASH, + CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF, + SA_SEQ_MASK_ON, SA_MC_DISABLE, + SA_NOT_COPY_PAD, SA_COPY_PAYLOAD, + SA_NOT_COPY_HDR); + + sa->sa_command_1.bf.key_len = keylen >> 3; + + crypto4xx_memcpy_to_le32(get_dynamic_sa_key_field(sa), + key, keylen); + + rc = crypto4xx_compute_gcm_hash_key_sw(get_dynamic_sa_inner_digest(sa), + key, keylen); + if (rc) { + pr_err("GCM hash key setting failed = %d\n", rc); + goto err; + } + + memcpy(ctx->sa_out, ctx->sa_in, ctx->sa_len * 4); + sa = (struct dynamic_sa_ctl *) ctx->sa_out; + sa->sa_command_0.bf.dir = DIR_OUTBOUND; + sa->sa_command_0.bf.opcode = SA_OPCODE_ENCRYPT_HASH; + + return 0; +err: + crypto4xx_free_sa(ctx); + return rc; +} + +static inline int crypto4xx_crypt_aes_gcm(struct aead_request *req, + bool decrypt) +{ + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); + struct crypto4xx_aead_reqctx *rctx = aead_request_ctx(req); + __le32 iv[4]; + unsigned int len = req->cryptlen; + + if (decrypt) + len -= crypto_aead_authsize(crypto_aead_reqtfm(req)); + + if (crypto4xx_aead_need_fallback(req, len, false, decrypt)) + return crypto4xx_aead_fallback(req, ctx, decrypt); + + crypto4xx_memcpy_to_le32(iv, req->iv, GCM_AES_IV_SIZE); + iv[3] = cpu_to_le32(1); + + return crypto4xx_build_pd(&req->base, ctx, req->src, req->dst, + len, iv, sizeof(iv), + decrypt ? ctx->sa_in : ctx->sa_out, + ctx->sa_len, req->assoclen, rctx->dst); +} + +int crypto4xx_encrypt_aes_gcm(struct aead_request *req) +{ + return crypto4xx_crypt_aes_gcm(req, false); +} + +int crypto4xx_decrypt_aes_gcm(struct aead_request *req) +{ + return crypto4xx_crypt_aes_gcm(req, true); +} + +/* + * HASH SHA1 Functions + */ +static int crypto4xx_hash_alg_init(struct crypto_tfm *tfm, + unsigned int sa_len, + unsigned char ha, + unsigned char hm) +{ + struct crypto_alg *alg = tfm->__crt_alg; + struct crypto4xx_alg *my_alg; + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(tfm); + struct dynamic_sa_hash160 *sa; + int rc; + + my_alg = container_of(__crypto_ahash_alg(alg), struct crypto4xx_alg, + alg.u.hash); + ctx->dev = my_alg->dev; + + /* Create SA */ + if (ctx->sa_in || ctx->sa_out) + crypto4xx_free_sa(ctx); + + rc = crypto4xx_alloc_sa(ctx, sa_len); + if (rc) + return rc; + + crypto_ahash_set_reqsize(__crypto_ahash_cast(tfm), + sizeof(struct crypto4xx_ctx)); + sa = (struct dynamic_sa_hash160 *)ctx->sa_in; + set_dynamic_sa_command_0(&sa->ctrl, SA_SAVE_HASH, SA_NOT_SAVE_IV, + SA_NOT_LOAD_HASH, SA_LOAD_IV_FROM_SA, + SA_NO_HEADER_PROC, ha, SA_CIPHER_ALG_NULL, + SA_PAD_TYPE_ZERO, SA_OP_GROUP_BASIC, + SA_OPCODE_HASH, DIR_INBOUND); + set_dynamic_sa_command_1(&sa->ctrl, 0, SA_HASH_MODE_HASH, + CRYPTO_FEEDBACK_MODE_NO_FB, SA_EXTENDED_SN_OFF, + SA_SEQ_MASK_OFF, SA_MC_ENABLE, + SA_NOT_COPY_PAD, SA_NOT_COPY_PAYLOAD, + SA_NOT_COPY_HDR); + /* Need to zero hash digest in SA */ + memset(sa->inner_digest, 0, sizeof(sa->inner_digest)); + memset(sa->outer_digest, 0, sizeof(sa->outer_digest)); + + return 0; +} + +int crypto4xx_hash_init(struct ahash_request *req) +{ + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); + int ds; + struct dynamic_sa_ctl *sa; + + sa = ctx->sa_in; + ds = crypto_ahash_digestsize( + __crypto_ahash_cast(req->base.tfm)); + sa->sa_command_0.bf.digest_len = ds >> 2; + sa->sa_command_0.bf.load_hash_state = SA_LOAD_HASH_FROM_SA; + + return 0; +} + +int crypto4xx_hash_update(struct ahash_request *req) +{ + struct crypto_ahash *ahash = crypto_ahash_reqtfm(req); + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); + struct scatterlist dst; + unsigned int ds = crypto_ahash_digestsize(ahash); + + sg_init_one(&dst, req->result, ds); + + return crypto4xx_build_pd(&req->base, ctx, req->src, &dst, + req->nbytes, NULL, 0, ctx->sa_in, + ctx->sa_len, 0, NULL); +} + +int crypto4xx_hash_final(struct ahash_request *req) +{ + return 0; +} + +int crypto4xx_hash_digest(struct ahash_request *req) +{ + struct crypto_ahash *ahash = crypto_ahash_reqtfm(req); + struct crypto4xx_ctx *ctx = crypto_tfm_ctx(req->base.tfm); + struct scatterlist dst; + unsigned int ds = crypto_ahash_digestsize(ahash); + + sg_init_one(&dst, req->result, ds); + + return crypto4xx_build_pd(&req->base, ctx, req->src, &dst, + req->nbytes, NULL, 0, ctx->sa_in, + ctx->sa_len, 0, NULL); +} + +/* + * SHA1 Algorithm + */ +int crypto4xx_sha1_alg_init(struct crypto_tfm *tfm) +{ + return crypto4xx_hash_alg_init(tfm, SA_HASH160_LEN, SA_HASH_ALG_SHA1, + SA_HASH_MODE_HASH); +} |