summaryrefslogtreecommitdiffstats
path: root/drivers/crypto/amcc/crypto4xx_alg.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/crypto/amcc/crypto4xx_alg.c')
-rw-r--r--drivers/crypto/amcc/crypto4xx_alg.c760
1 files changed, 760 insertions, 0 deletions
diff --git a/drivers/crypto/amcc/crypto4xx_alg.c b/drivers/crypto/amcc/crypto4xx_alg.c
new file mode 100644
index 000000000..1d87deca3
--- /dev/null
+++ b/drivers/crypto/amcc/crypto4xx_alg.c
@@ -0,0 +1,760 @@
+/**
+ * AMCC SoC PPC4xx Crypto Driver
+ *
+ * Copyright (c) 2008 Applied Micro Circuits Corporation.
+ * All rights reserved. James Hsiao <jhsiao@amcc.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * 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/sha.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) {
+ crypto_skcipher_set_flags(cipher,
+ CRYPTO_TFM_RES_BAD_KEY_LEN);
+ 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) {
+ struct skcipher_request *subreq = skcipher_request_ctx(req);
+ int ret;
+
+ skcipher_request_set_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)
+{
+ int rc;
+
+ crypto_skcipher_clear_flags(ctx->sw_cipher.cipher,
+ CRYPTO_TFM_REQ_MASK);
+ crypto_skcipher_set_flags(ctx->sw_cipher.cipher,
+ crypto_skcipher_get_flags(cipher) & CRYPTO_TFM_REQ_MASK);
+ rc = crypto_skcipher_setkey(ctx->sw_cipher.cipher, key, keylen);
+ crypto_skcipher_clear_flags(cipher, CRYPTO_TFM_RES_MASK);
+ crypto_skcipher_set_flags(cipher,
+ crypto_skcipher_get_flags(ctx->sw_cipher.cipher) &
+ CRYPTO_TFM_RES_MASK);
+
+ return rc;
+}
+
+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)
+{
+ int rc;
+
+ 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);
+ rc = crypto_aead_setkey(ctx->sw_cipher.aead, key, keylen);
+ crypto_aead_clear_flags(cipher, CRYPTO_TFM_RES_MASK);
+ crypto_aead_set_flags(cipher,
+ crypto_aead_get_flags(ctx->sw_cipher.aead) &
+ CRYPTO_TFM_RES_MASK);
+
+ return rc;
+}
+
+/**
+ * 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_cipher *aes_tfm = NULL;
+ uint8_t src[16] = { 0 };
+ int rc = 0;
+
+ aes_tfm = crypto_alloc_cipher("aes", 0, CRYPTO_ALG_ASYNC |
+ CRYPTO_ALG_NEED_FALLBACK);
+ if (IS_ERR(aes_tfm)) {
+ rc = PTR_ERR(aes_tfm);
+ pr_warn("could not load aes cipher driver: %d\n", rc);
+ return rc;
+ }
+
+ rc = crypto_cipher_setkey(aes_tfm, key, keylen);
+ if (rc) {
+ pr_err("setkey() failed: %d\n", rc);
+ goto out;
+ }
+
+ crypto_cipher_encrypt_one(aes_tfm, src, src);
+ crypto4xx_memcpy_to_le32(hash_start, src, 16);
+out:
+ crypto_free_cipher(aes_tfm);
+ return rc;
+}
+
+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) {
+ crypto_aead_set_flags(cipher, CRYPTO_TFM_RES_BAD_KEY_LEN);
+ 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);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 07:47:09 +0000