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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /arch/x86/crypto/aesni-intel_glue.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/crypto/aesni-intel_glue.c')
-rw-r--r--arch/x86/crypto/aesni-intel_glue.c1319
1 files changed, 1319 insertions, 0 deletions
diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c
new file mode 100644
index 000000000..a5b0cb3ef
--- /dev/null
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -0,0 +1,1319 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Support for Intel AES-NI instructions. This file contains glue
+ * code, the real AES implementation is in intel-aes_asm.S.
+ *
+ * Copyright (C) 2008, Intel Corp.
+ * Author: Huang Ying <ying.huang@intel.com>
+ *
+ * Added RFC4106 AES-GCM support for 128-bit keys under the AEAD
+ * interface for 64-bit kernels.
+ * Authors: Adrian Hoban <adrian.hoban@intel.com>
+ * Gabriele Paoloni <gabriele.paoloni@intel.com>
+ * Tadeusz Struk (tadeusz.struk@intel.com)
+ * Aidan O'Mahony (aidan.o.mahony@intel.com)
+ * Copyright (c) 2010, Intel Corporation.
+ */
+
+#include <linux/hardirq.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <crypto/algapi.h>
+#include <crypto/aes.h>
+#include <crypto/ctr.h>
+#include <crypto/b128ops.h>
+#include <crypto/gcm.h>
+#include <crypto/xts.h>
+#include <asm/cpu_device_id.h>
+#include <asm/simd.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/internal/aead.h>
+#include <crypto/internal/simd.h>
+#include <crypto/internal/skcipher.h>
+#include <linux/jump_label.h>
+#include <linux/workqueue.h>
+#include <linux/spinlock.h>
+#include <linux/static_call.h>
+
+
+#define AESNI_ALIGN 16
+#define AESNI_ALIGN_ATTR __attribute__ ((__aligned__(AESNI_ALIGN)))
+#define AES_BLOCK_MASK (~(AES_BLOCK_SIZE - 1))
+#define RFC4106_HASH_SUBKEY_SIZE 16
+#define AESNI_ALIGN_EXTRA ((AESNI_ALIGN - 1) & ~(CRYPTO_MINALIGN - 1))
+#define CRYPTO_AES_CTX_SIZE (sizeof(struct crypto_aes_ctx) + AESNI_ALIGN_EXTRA)
+#define XTS_AES_CTX_SIZE (sizeof(struct aesni_xts_ctx) + AESNI_ALIGN_EXTRA)
+
+/* This data is stored at the end of the crypto_tfm struct.
+ * It's a type of per "session" data storage location.
+ * This needs to be 16 byte aligned.
+ */
+struct aesni_rfc4106_gcm_ctx {
+ u8 hash_subkey[16] AESNI_ALIGN_ATTR;
+ struct crypto_aes_ctx aes_key_expanded AESNI_ALIGN_ATTR;
+ u8 nonce[4];
+};
+
+struct generic_gcmaes_ctx {
+ u8 hash_subkey[16] AESNI_ALIGN_ATTR;
+ struct crypto_aes_ctx aes_key_expanded AESNI_ALIGN_ATTR;
+};
+
+struct aesni_xts_ctx {
+ u8 raw_tweak_ctx[sizeof(struct crypto_aes_ctx)] AESNI_ALIGN_ATTR;
+ u8 raw_crypt_ctx[sizeof(struct crypto_aes_ctx)] AESNI_ALIGN_ATTR;
+};
+
+#define GCM_BLOCK_LEN 16
+
+struct gcm_context_data {
+ /* init, update and finalize context data */
+ u8 aad_hash[GCM_BLOCK_LEN];
+ u64 aad_length;
+ u64 in_length;
+ u8 partial_block_enc_key[GCM_BLOCK_LEN];
+ u8 orig_IV[GCM_BLOCK_LEN];
+ u8 current_counter[GCM_BLOCK_LEN];
+ u64 partial_block_len;
+ u64 unused;
+ u8 hash_keys[GCM_BLOCK_LEN * 16];
+};
+
+asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
+ unsigned int key_len);
+asmlinkage void aesni_enc(const void *ctx, u8 *out, const u8 *in);
+asmlinkage void aesni_dec(const void *ctx, u8 *out, const u8 *in);
+asmlinkage void aesni_ecb_enc(struct crypto_aes_ctx *ctx, u8 *out,
+ const u8 *in, unsigned int len);
+asmlinkage void aesni_ecb_dec(struct crypto_aes_ctx *ctx, u8 *out,
+ const u8 *in, unsigned int len);
+asmlinkage void aesni_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out,
+ const u8 *in, unsigned int len, u8 *iv);
+asmlinkage void aesni_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out,
+ const u8 *in, unsigned int len, u8 *iv);
+asmlinkage void aesni_cts_cbc_enc(struct crypto_aes_ctx *ctx, u8 *out,
+ const u8 *in, unsigned int len, u8 *iv);
+asmlinkage void aesni_cts_cbc_dec(struct crypto_aes_ctx *ctx, u8 *out,
+ const u8 *in, unsigned int len, u8 *iv);
+
+#define AVX_GEN2_OPTSIZE 640
+#define AVX_GEN4_OPTSIZE 4096
+
+asmlinkage void aesni_xts_encrypt(const struct crypto_aes_ctx *ctx, u8 *out,
+ const u8 *in, unsigned int len, u8 *iv);
+
+asmlinkage void aesni_xts_decrypt(const struct crypto_aes_ctx *ctx, u8 *out,
+ const u8 *in, unsigned int len, u8 *iv);
+
+#ifdef CONFIG_X86_64
+
+asmlinkage void aesni_ctr_enc(struct crypto_aes_ctx *ctx, u8 *out,
+ const u8 *in, unsigned int len, u8 *iv);
+DEFINE_STATIC_CALL(aesni_ctr_enc_tfm, aesni_ctr_enc);
+
+/* Scatter / Gather routines, with args similar to above */
+asmlinkage void aesni_gcm_init(void *ctx,
+ struct gcm_context_data *gdata,
+ u8 *iv,
+ u8 *hash_subkey, const u8 *aad,
+ unsigned long aad_len);
+asmlinkage void aesni_gcm_enc_update(void *ctx,
+ struct gcm_context_data *gdata, u8 *out,
+ const u8 *in, unsigned long plaintext_len);
+asmlinkage void aesni_gcm_dec_update(void *ctx,
+ struct gcm_context_data *gdata, u8 *out,
+ const u8 *in,
+ unsigned long ciphertext_len);
+asmlinkage void aesni_gcm_finalize(void *ctx,
+ struct gcm_context_data *gdata,
+ u8 *auth_tag, unsigned long auth_tag_len);
+
+asmlinkage void aes_ctr_enc_128_avx_by8(const u8 *in, u8 *iv,
+ void *keys, u8 *out, unsigned int num_bytes);
+asmlinkage void aes_ctr_enc_192_avx_by8(const u8 *in, u8 *iv,
+ void *keys, u8 *out, unsigned int num_bytes);
+asmlinkage void aes_ctr_enc_256_avx_by8(const u8 *in, u8 *iv,
+ void *keys, u8 *out, unsigned int num_bytes);
+
+
+asmlinkage void aes_xctr_enc_128_avx_by8(const u8 *in, const u8 *iv,
+ const void *keys, u8 *out, unsigned int num_bytes,
+ unsigned int byte_ctr);
+
+asmlinkage void aes_xctr_enc_192_avx_by8(const u8 *in, const u8 *iv,
+ const void *keys, u8 *out, unsigned int num_bytes,
+ unsigned int byte_ctr);
+
+asmlinkage void aes_xctr_enc_256_avx_by8(const u8 *in, const u8 *iv,
+ const void *keys, u8 *out, unsigned int num_bytes,
+ unsigned int byte_ctr);
+
+/*
+ * asmlinkage void aesni_gcm_init_avx_gen2()
+ * gcm_data *my_ctx_data, context data
+ * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
+ */
+asmlinkage void aesni_gcm_init_avx_gen2(void *my_ctx_data,
+ struct gcm_context_data *gdata,
+ u8 *iv,
+ u8 *hash_subkey,
+ const u8 *aad,
+ unsigned long aad_len);
+
+asmlinkage void aesni_gcm_enc_update_avx_gen2(void *ctx,
+ struct gcm_context_data *gdata, u8 *out,
+ const u8 *in, unsigned long plaintext_len);
+asmlinkage void aesni_gcm_dec_update_avx_gen2(void *ctx,
+ struct gcm_context_data *gdata, u8 *out,
+ const u8 *in,
+ unsigned long ciphertext_len);
+asmlinkage void aesni_gcm_finalize_avx_gen2(void *ctx,
+ struct gcm_context_data *gdata,
+ u8 *auth_tag, unsigned long auth_tag_len);
+
+/*
+ * asmlinkage void aesni_gcm_init_avx_gen4()
+ * gcm_data *my_ctx_data, context data
+ * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
+ */
+asmlinkage void aesni_gcm_init_avx_gen4(void *my_ctx_data,
+ struct gcm_context_data *gdata,
+ u8 *iv,
+ u8 *hash_subkey,
+ const u8 *aad,
+ unsigned long aad_len);
+
+asmlinkage void aesni_gcm_enc_update_avx_gen4(void *ctx,
+ struct gcm_context_data *gdata, u8 *out,
+ const u8 *in, unsigned long plaintext_len);
+asmlinkage void aesni_gcm_dec_update_avx_gen4(void *ctx,
+ struct gcm_context_data *gdata, u8 *out,
+ const u8 *in,
+ unsigned long ciphertext_len);
+asmlinkage void aesni_gcm_finalize_avx_gen4(void *ctx,
+ struct gcm_context_data *gdata,
+ u8 *auth_tag, unsigned long auth_tag_len);
+
+static __ro_after_init DEFINE_STATIC_KEY_FALSE(gcm_use_avx);
+static __ro_after_init DEFINE_STATIC_KEY_FALSE(gcm_use_avx2);
+
+static inline struct
+aesni_rfc4106_gcm_ctx *aesni_rfc4106_gcm_ctx_get(struct crypto_aead *tfm)
+{
+ unsigned long align = AESNI_ALIGN;
+
+ if (align <= crypto_tfm_ctx_alignment())
+ align = 1;
+ return PTR_ALIGN(crypto_aead_ctx(tfm), align);
+}
+
+static inline struct
+generic_gcmaes_ctx *generic_gcmaes_ctx_get(struct crypto_aead *tfm)
+{
+ unsigned long align = AESNI_ALIGN;
+
+ if (align <= crypto_tfm_ctx_alignment())
+ align = 1;
+ return PTR_ALIGN(crypto_aead_ctx(tfm), align);
+}
+#endif
+
+static inline struct crypto_aes_ctx *aes_ctx(void *raw_ctx)
+{
+ unsigned long addr = (unsigned long)raw_ctx;
+ unsigned long align = AESNI_ALIGN;
+
+ if (align <= crypto_tfm_ctx_alignment())
+ align = 1;
+ return (struct crypto_aes_ctx *)ALIGN(addr, align);
+}
+
+static int aes_set_key_common(struct crypto_tfm *tfm, void *raw_ctx,
+ const u8 *in_key, unsigned int key_len)
+{
+ struct crypto_aes_ctx *ctx = aes_ctx(raw_ctx);
+ int err;
+
+ if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 &&
+ key_len != AES_KEYSIZE_256)
+ return -EINVAL;
+
+ if (!crypto_simd_usable())
+ err = aes_expandkey(ctx, in_key, key_len);
+ else {
+ kernel_fpu_begin();
+ err = aesni_set_key(ctx, in_key, key_len);
+ kernel_fpu_end();
+ }
+
+ return err;
+}
+
+static int aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
+ unsigned int key_len)
+{
+ return aes_set_key_common(tfm, crypto_tfm_ctx(tfm), in_key, key_len);
+}
+
+static void aesni_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
+
+ if (!crypto_simd_usable()) {
+ aes_encrypt(ctx, dst, src);
+ } else {
+ kernel_fpu_begin();
+ aesni_enc(ctx, dst, src);
+ kernel_fpu_end();
+ }
+}
+
+static void aesni_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
+
+ if (!crypto_simd_usable()) {
+ aes_decrypt(ctx, dst, src);
+ } else {
+ kernel_fpu_begin();
+ aesni_dec(ctx, dst, src);
+ kernel_fpu_end();
+ }
+}
+
+static int aesni_skcipher_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int len)
+{
+ return aes_set_key_common(crypto_skcipher_tfm(tfm),
+ crypto_skcipher_ctx(tfm), key, len);
+}
+
+static int ecb_encrypt(struct skcipher_request *req)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
+ struct skcipher_walk walk;
+ unsigned int nbytes;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, false);
+
+ while ((nbytes = walk.nbytes)) {
+ kernel_fpu_begin();
+ aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
+ nbytes & AES_BLOCK_MASK);
+ kernel_fpu_end();
+ nbytes &= AES_BLOCK_SIZE - 1;
+ err = skcipher_walk_done(&walk, nbytes);
+ }
+
+ return err;
+}
+
+static int ecb_decrypt(struct skcipher_request *req)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
+ struct skcipher_walk walk;
+ unsigned int nbytes;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, false);
+
+ while ((nbytes = walk.nbytes)) {
+ kernel_fpu_begin();
+ aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
+ nbytes & AES_BLOCK_MASK);
+ kernel_fpu_end();
+ nbytes &= AES_BLOCK_SIZE - 1;
+ err = skcipher_walk_done(&walk, nbytes);
+ }
+
+ return err;
+}
+
+static int cbc_encrypt(struct skcipher_request *req)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
+ struct skcipher_walk walk;
+ unsigned int nbytes;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, false);
+
+ while ((nbytes = walk.nbytes)) {
+ kernel_fpu_begin();
+ aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
+ nbytes & AES_BLOCK_MASK, walk.iv);
+ kernel_fpu_end();
+ nbytes &= AES_BLOCK_SIZE - 1;
+ err = skcipher_walk_done(&walk, nbytes);
+ }
+
+ return err;
+}
+
+static int cbc_decrypt(struct skcipher_request *req)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
+ struct skcipher_walk walk;
+ unsigned int nbytes;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, false);
+
+ while ((nbytes = walk.nbytes)) {
+ kernel_fpu_begin();
+ aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
+ nbytes & AES_BLOCK_MASK, walk.iv);
+ kernel_fpu_end();
+ nbytes &= AES_BLOCK_SIZE - 1;
+ err = skcipher_walk_done(&walk, nbytes);
+ }
+
+ return err;
+}
+
+static int cts_cbc_encrypt(struct skcipher_request *req)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
+ int cbc_blocks = DIV_ROUND_UP(req->cryptlen, AES_BLOCK_SIZE) - 2;
+ struct scatterlist *src = req->src, *dst = req->dst;
+ struct scatterlist sg_src[2], sg_dst[2];
+ struct skcipher_request subreq;
+ struct skcipher_walk walk;
+ int err;
+
+ skcipher_request_set_tfm(&subreq, tfm);
+ skcipher_request_set_callback(&subreq, skcipher_request_flags(req),
+ NULL, NULL);
+
+ if (req->cryptlen <= AES_BLOCK_SIZE) {
+ if (req->cryptlen < AES_BLOCK_SIZE)
+ return -EINVAL;
+ cbc_blocks = 1;
+ }
+
+ if (cbc_blocks > 0) {
+ skcipher_request_set_crypt(&subreq, req->src, req->dst,
+ cbc_blocks * AES_BLOCK_SIZE,
+ req->iv);
+
+ err = cbc_encrypt(&subreq);
+ if (err)
+ return err;
+
+ if (req->cryptlen == AES_BLOCK_SIZE)
+ return 0;
+
+ dst = src = scatterwalk_ffwd(sg_src, req->src, subreq.cryptlen);
+ if (req->dst != req->src)
+ dst = scatterwalk_ffwd(sg_dst, req->dst,
+ subreq.cryptlen);
+ }
+
+ /* handle ciphertext stealing */
+ skcipher_request_set_crypt(&subreq, src, dst,
+ req->cryptlen - cbc_blocks * AES_BLOCK_SIZE,
+ req->iv);
+
+ err = skcipher_walk_virt(&walk, &subreq, false);
+ if (err)
+ return err;
+
+ kernel_fpu_begin();
+ aesni_cts_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
+ walk.nbytes, walk.iv);
+ kernel_fpu_end();
+
+ return skcipher_walk_done(&walk, 0);
+}
+
+static int cts_cbc_decrypt(struct skcipher_request *req)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
+ int cbc_blocks = DIV_ROUND_UP(req->cryptlen, AES_BLOCK_SIZE) - 2;
+ struct scatterlist *src = req->src, *dst = req->dst;
+ struct scatterlist sg_src[2], sg_dst[2];
+ struct skcipher_request subreq;
+ struct skcipher_walk walk;
+ int err;
+
+ skcipher_request_set_tfm(&subreq, tfm);
+ skcipher_request_set_callback(&subreq, skcipher_request_flags(req),
+ NULL, NULL);
+
+ if (req->cryptlen <= AES_BLOCK_SIZE) {
+ if (req->cryptlen < AES_BLOCK_SIZE)
+ return -EINVAL;
+ cbc_blocks = 1;
+ }
+
+ if (cbc_blocks > 0) {
+ skcipher_request_set_crypt(&subreq, req->src, req->dst,
+ cbc_blocks * AES_BLOCK_SIZE,
+ req->iv);
+
+ err = cbc_decrypt(&subreq);
+ if (err)
+ return err;
+
+ if (req->cryptlen == AES_BLOCK_SIZE)
+ return 0;
+
+ dst = src = scatterwalk_ffwd(sg_src, req->src, subreq.cryptlen);
+ if (req->dst != req->src)
+ dst = scatterwalk_ffwd(sg_dst, req->dst,
+ subreq.cryptlen);
+ }
+
+ /* handle ciphertext stealing */
+ skcipher_request_set_crypt(&subreq, src, dst,
+ req->cryptlen - cbc_blocks * AES_BLOCK_SIZE,
+ req->iv);
+
+ err = skcipher_walk_virt(&walk, &subreq, false);
+ if (err)
+ return err;
+
+ kernel_fpu_begin();
+ aesni_cts_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
+ walk.nbytes, walk.iv);
+ kernel_fpu_end();
+
+ return skcipher_walk_done(&walk, 0);
+}
+
+#ifdef CONFIG_X86_64
+static void aesni_ctr_enc_avx_tfm(struct crypto_aes_ctx *ctx, u8 *out,
+ const u8 *in, unsigned int len, u8 *iv)
+{
+ /*
+ * based on key length, override with the by8 version
+ * of ctr mode encryption/decryption for improved performance
+ * aes_set_key_common() ensures that key length is one of
+ * {128,192,256}
+ */
+ if (ctx->key_length == AES_KEYSIZE_128)
+ aes_ctr_enc_128_avx_by8(in, iv, (void *)ctx, out, len);
+ else if (ctx->key_length == AES_KEYSIZE_192)
+ aes_ctr_enc_192_avx_by8(in, iv, (void *)ctx, out, len);
+ else
+ aes_ctr_enc_256_avx_by8(in, iv, (void *)ctx, out, len);
+}
+
+static int ctr_crypt(struct skcipher_request *req)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
+ u8 keystream[AES_BLOCK_SIZE];
+ struct skcipher_walk walk;
+ unsigned int nbytes;
+ int err;
+
+ err = skcipher_walk_virt(&walk, req, false);
+
+ while ((nbytes = walk.nbytes) > 0) {
+ kernel_fpu_begin();
+ if (nbytes & AES_BLOCK_MASK)
+ static_call(aesni_ctr_enc_tfm)(ctx, walk.dst.virt.addr,
+ walk.src.virt.addr,
+ nbytes & AES_BLOCK_MASK,
+ walk.iv);
+ nbytes &= ~AES_BLOCK_MASK;
+
+ if (walk.nbytes == walk.total && nbytes > 0) {
+ aesni_enc(ctx, keystream, walk.iv);
+ crypto_xor_cpy(walk.dst.virt.addr + walk.nbytes - nbytes,
+ walk.src.virt.addr + walk.nbytes - nbytes,
+ keystream, nbytes);
+ crypto_inc(walk.iv, AES_BLOCK_SIZE);
+ nbytes = 0;
+ }
+ kernel_fpu_end();
+ err = skcipher_walk_done(&walk, nbytes);
+ }
+ return err;
+}
+
+static void aesni_xctr_enc_avx_tfm(struct crypto_aes_ctx *ctx, u8 *out,
+ const u8 *in, unsigned int len, u8 *iv,
+ unsigned int byte_ctr)
+{
+ if (ctx->key_length == AES_KEYSIZE_128)
+ aes_xctr_enc_128_avx_by8(in, iv, (void *)ctx, out, len,
+ byte_ctr);
+ else if (ctx->key_length == AES_KEYSIZE_192)
+ aes_xctr_enc_192_avx_by8(in, iv, (void *)ctx, out, len,
+ byte_ctr);
+ else
+ aes_xctr_enc_256_avx_by8(in, iv, (void *)ctx, out, len,
+ byte_ctr);
+}
+
+static int xctr_crypt(struct skcipher_request *req)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_skcipher_ctx(tfm));
+ u8 keystream[AES_BLOCK_SIZE];
+ struct skcipher_walk walk;
+ unsigned int nbytes;
+ unsigned int byte_ctr = 0;
+ int err;
+ __le32 block[AES_BLOCK_SIZE / sizeof(__le32)];
+
+ err = skcipher_walk_virt(&walk, req, false);
+
+ while ((nbytes = walk.nbytes) > 0) {
+ kernel_fpu_begin();
+ if (nbytes & AES_BLOCK_MASK)
+ aesni_xctr_enc_avx_tfm(ctx, walk.dst.virt.addr,
+ walk.src.virt.addr, nbytes & AES_BLOCK_MASK,
+ walk.iv, byte_ctr);
+ nbytes &= ~AES_BLOCK_MASK;
+ byte_ctr += walk.nbytes - nbytes;
+
+ if (walk.nbytes == walk.total && nbytes > 0) {
+ memcpy(block, walk.iv, AES_BLOCK_SIZE);
+ block[0] ^= cpu_to_le32(1 + byte_ctr / AES_BLOCK_SIZE);
+ aesni_enc(ctx, keystream, (u8 *)block);
+ crypto_xor_cpy(walk.dst.virt.addr + walk.nbytes -
+ nbytes, walk.src.virt.addr + walk.nbytes
+ - nbytes, keystream, nbytes);
+ byte_ctr += nbytes;
+ nbytes = 0;
+ }
+ kernel_fpu_end();
+ err = skcipher_walk_done(&walk, nbytes);
+ }
+ return err;
+}
+
+static int
+rfc4106_set_hash_subkey(u8 *hash_subkey, const u8 *key, unsigned int key_len)
+{
+ struct crypto_aes_ctx ctx;
+ int ret;
+
+ ret = aes_expandkey(&ctx, key, key_len);
+ if (ret)
+ return ret;
+
+ /* Clear the data in the hash sub key container to zero.*/
+ /* We want to cipher all zeros to create the hash sub key. */
+ memset(hash_subkey, 0, RFC4106_HASH_SUBKEY_SIZE);
+
+ aes_encrypt(&ctx, hash_subkey, hash_subkey);
+
+ memzero_explicit(&ctx, sizeof(ctx));
+ return 0;
+}
+
+static int common_rfc4106_set_key(struct crypto_aead *aead, const u8 *key,
+ unsigned int key_len)
+{
+ struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(aead);
+
+ if (key_len < 4)
+ return -EINVAL;
+
+ /*Account for 4 byte nonce at the end.*/
+ key_len -= 4;
+
+ memcpy(ctx->nonce, key + key_len, sizeof(ctx->nonce));
+
+ return aes_set_key_common(crypto_aead_tfm(aead),
+ &ctx->aes_key_expanded, key, key_len) ?:
+ rfc4106_set_hash_subkey(ctx->hash_subkey, key, key_len);
+}
+
+/* This is the Integrity Check Value (aka the authentication tag) length and can
+ * be 8, 12 or 16 bytes long. */
+static int common_rfc4106_set_authsize(struct crypto_aead *aead,
+ unsigned int authsize)
+{
+ switch (authsize) {
+ case 8:
+ case 12:
+ case 16:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int generic_gcmaes_set_authsize(struct crypto_aead *tfm,
+ unsigned int authsize)
+{
+ switch (authsize) {
+ case 4:
+ case 8:
+ case 12:
+ case 13:
+ case 14:
+ case 15:
+ case 16:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int gcmaes_crypt_by_sg(bool enc, struct aead_request *req,
+ unsigned int assoclen, u8 *hash_subkey,
+ u8 *iv, void *aes_ctx, u8 *auth_tag,
+ unsigned long auth_tag_len)
+{
+ u8 databuf[sizeof(struct gcm_context_data) + (AESNI_ALIGN - 8)] __aligned(8);
+ struct gcm_context_data *data = PTR_ALIGN((void *)databuf, AESNI_ALIGN);
+ unsigned long left = req->cryptlen;
+ struct scatter_walk assoc_sg_walk;
+ struct skcipher_walk walk;
+ bool do_avx, do_avx2;
+ u8 *assocmem = NULL;
+ u8 *assoc;
+ int err;
+
+ if (!enc)
+ left -= auth_tag_len;
+
+ do_avx = (left >= AVX_GEN2_OPTSIZE);
+ do_avx2 = (left >= AVX_GEN4_OPTSIZE);
+
+ /* Linearize assoc, if not already linear */
+ if (req->src->length >= assoclen && req->src->length) {
+ scatterwalk_start(&assoc_sg_walk, req->src);
+ assoc = scatterwalk_map(&assoc_sg_walk);
+ } else {
+ gfp_t flags = (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP) ?
+ GFP_KERNEL : GFP_ATOMIC;
+
+ /* assoc can be any length, so must be on heap */
+ assocmem = kmalloc(assoclen, flags);
+ if (unlikely(!assocmem))
+ return -ENOMEM;
+ assoc = assocmem;
+
+ scatterwalk_map_and_copy(assoc, req->src, 0, assoclen, 0);
+ }
+
+ kernel_fpu_begin();
+ if (static_branch_likely(&gcm_use_avx2) && do_avx2)
+ aesni_gcm_init_avx_gen4(aes_ctx, data, iv, hash_subkey, assoc,
+ assoclen);
+ else if (static_branch_likely(&gcm_use_avx) && do_avx)
+ aesni_gcm_init_avx_gen2(aes_ctx, data, iv, hash_subkey, assoc,
+ assoclen);
+ else
+ aesni_gcm_init(aes_ctx, data, iv, hash_subkey, assoc, assoclen);
+ kernel_fpu_end();
+
+ if (!assocmem)
+ scatterwalk_unmap(assoc);
+ else
+ kfree(assocmem);
+
+ err = enc ? skcipher_walk_aead_encrypt(&walk, req, false)
+ : skcipher_walk_aead_decrypt(&walk, req, false);
+
+ while (walk.nbytes > 0) {
+ kernel_fpu_begin();
+ if (static_branch_likely(&gcm_use_avx2) && do_avx2) {
+ if (enc)
+ aesni_gcm_enc_update_avx_gen4(aes_ctx, data,
+ walk.dst.virt.addr,
+ walk.src.virt.addr,
+ walk.nbytes);
+ else
+ aesni_gcm_dec_update_avx_gen4(aes_ctx, data,
+ walk.dst.virt.addr,
+ walk.src.virt.addr,
+ walk.nbytes);
+ } else if (static_branch_likely(&gcm_use_avx) && do_avx) {
+ if (enc)
+ aesni_gcm_enc_update_avx_gen2(aes_ctx, data,
+ walk.dst.virt.addr,
+ walk.src.virt.addr,
+ walk.nbytes);
+ else
+ aesni_gcm_dec_update_avx_gen2(aes_ctx, data,
+ walk.dst.virt.addr,
+ walk.src.virt.addr,
+ walk.nbytes);
+ } else if (enc) {
+ aesni_gcm_enc_update(aes_ctx, data, walk.dst.virt.addr,
+ walk.src.virt.addr, walk.nbytes);
+ } else {
+ aesni_gcm_dec_update(aes_ctx, data, walk.dst.virt.addr,
+ walk.src.virt.addr, walk.nbytes);
+ }
+ kernel_fpu_end();
+
+ err = skcipher_walk_done(&walk, 0);
+ }
+
+ if (err)
+ return err;
+
+ kernel_fpu_begin();
+ if (static_branch_likely(&gcm_use_avx2) && do_avx2)
+ aesni_gcm_finalize_avx_gen4(aes_ctx, data, auth_tag,
+ auth_tag_len);
+ else if (static_branch_likely(&gcm_use_avx) && do_avx)
+ aesni_gcm_finalize_avx_gen2(aes_ctx, data, auth_tag,
+ auth_tag_len);
+ else
+ aesni_gcm_finalize(aes_ctx, data, auth_tag, auth_tag_len);
+ kernel_fpu_end();
+
+ return 0;
+}
+
+static int gcmaes_encrypt(struct aead_request *req, unsigned int assoclen,
+ u8 *hash_subkey, u8 *iv, void *aes_ctx)
+{
+ struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+ unsigned long auth_tag_len = crypto_aead_authsize(tfm);
+ u8 auth_tag[16];
+ int err;
+
+ err = gcmaes_crypt_by_sg(true, req, assoclen, hash_subkey, iv, aes_ctx,
+ auth_tag, auth_tag_len);
+ if (err)
+ return err;
+
+ scatterwalk_map_and_copy(auth_tag, req->dst,
+ req->assoclen + req->cryptlen,
+ auth_tag_len, 1);
+ return 0;
+}
+
+static int gcmaes_decrypt(struct aead_request *req, unsigned int assoclen,
+ u8 *hash_subkey, u8 *iv, void *aes_ctx)
+{
+ struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+ unsigned long auth_tag_len = crypto_aead_authsize(tfm);
+ u8 auth_tag_msg[16];
+ u8 auth_tag[16];
+ int err;
+
+ err = gcmaes_crypt_by_sg(false, req, assoclen, hash_subkey, iv, aes_ctx,
+ auth_tag, auth_tag_len);
+ if (err)
+ return err;
+
+ /* Copy out original auth_tag */
+ scatterwalk_map_and_copy(auth_tag_msg, req->src,
+ req->assoclen + req->cryptlen - auth_tag_len,
+ auth_tag_len, 0);
+
+ /* Compare generated tag with passed in tag. */
+ if (crypto_memneq(auth_tag_msg, auth_tag, auth_tag_len)) {
+ memzero_explicit(auth_tag, sizeof(auth_tag));
+ return -EBADMSG;
+ }
+ return 0;
+}
+
+static int helper_rfc4106_encrypt(struct aead_request *req)
+{
+ struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+ struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
+ void *aes_ctx = &(ctx->aes_key_expanded);
+ u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8);
+ u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN);
+ unsigned int i;
+ __be32 counter = cpu_to_be32(1);
+
+ /* Assuming we are supporting rfc4106 64-bit extended */
+ /* sequence numbers We need to have the AAD length equal */
+ /* to 16 or 20 bytes */
+ if (unlikely(req->assoclen != 16 && req->assoclen != 20))
+ return -EINVAL;
+
+ /* IV below built */
+ for (i = 0; i < 4; i++)
+ *(iv+i) = ctx->nonce[i];
+ for (i = 0; i < 8; i++)
+ *(iv+4+i) = req->iv[i];
+ *((__be32 *)(iv+12)) = counter;
+
+ return gcmaes_encrypt(req, req->assoclen - 8, ctx->hash_subkey, iv,
+ aes_ctx);
+}
+
+static int helper_rfc4106_decrypt(struct aead_request *req)
+{
+ __be32 counter = cpu_to_be32(1);
+ struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+ struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
+ void *aes_ctx = &(ctx->aes_key_expanded);
+ u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8);
+ u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN);
+ unsigned int i;
+
+ if (unlikely(req->assoclen != 16 && req->assoclen != 20))
+ return -EINVAL;
+
+ /* Assuming we are supporting rfc4106 64-bit extended */
+ /* sequence numbers We need to have the AAD length */
+ /* equal to 16 or 20 bytes */
+
+ /* IV below built */
+ for (i = 0; i < 4; i++)
+ *(iv+i) = ctx->nonce[i];
+ for (i = 0; i < 8; i++)
+ *(iv+4+i) = req->iv[i];
+ *((__be32 *)(iv+12)) = counter;
+
+ return gcmaes_decrypt(req, req->assoclen - 8, ctx->hash_subkey, iv,
+ aes_ctx);
+}
+#endif
+
+static int xts_aesni_setkey(struct crypto_skcipher *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
+ int err;
+
+ err = xts_verify_key(tfm, key, keylen);
+ if (err)
+ return err;
+
+ keylen /= 2;
+
+ /* first half of xts-key is for crypt */
+ err = aes_set_key_common(crypto_skcipher_tfm(tfm), ctx->raw_crypt_ctx,
+ key, keylen);
+ if (err)
+ return err;
+
+ /* second half of xts-key is for tweak */
+ return aes_set_key_common(crypto_skcipher_tfm(tfm), ctx->raw_tweak_ctx,
+ key + keylen, keylen);
+}
+
+static int xts_crypt(struct skcipher_request *req, bool encrypt)
+{
+ struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+ struct aesni_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
+ int tail = req->cryptlen % AES_BLOCK_SIZE;
+ struct skcipher_request subreq;
+ struct skcipher_walk walk;
+ int err;
+
+ if (req->cryptlen < AES_BLOCK_SIZE)
+ return -EINVAL;
+
+ err = skcipher_walk_virt(&walk, req, false);
+ if (!walk.nbytes)
+ return err;
+
+ if (unlikely(tail > 0 && walk.nbytes < walk.total)) {
+ int blocks = DIV_ROUND_UP(req->cryptlen, AES_BLOCK_SIZE) - 2;
+
+ skcipher_walk_abort(&walk);
+
+ skcipher_request_set_tfm(&subreq, tfm);
+ skcipher_request_set_callback(&subreq,
+ skcipher_request_flags(req),
+ NULL, NULL);
+ skcipher_request_set_crypt(&subreq, req->src, req->dst,
+ blocks * AES_BLOCK_SIZE, req->iv);
+ req = &subreq;
+
+ err = skcipher_walk_virt(&walk, req, false);
+ if (!walk.nbytes)
+ return err;
+ } else {
+ tail = 0;
+ }
+
+ kernel_fpu_begin();
+
+ /* calculate first value of T */
+ aesni_enc(aes_ctx(ctx->raw_tweak_ctx), walk.iv, walk.iv);
+
+ while (walk.nbytes > 0) {
+ int nbytes = walk.nbytes;
+
+ if (nbytes < walk.total)
+ nbytes &= ~(AES_BLOCK_SIZE - 1);
+
+ if (encrypt)
+ aesni_xts_encrypt(aes_ctx(ctx->raw_crypt_ctx),
+ walk.dst.virt.addr, walk.src.virt.addr,
+ nbytes, walk.iv);
+ else
+ aesni_xts_decrypt(aes_ctx(ctx->raw_crypt_ctx),
+ walk.dst.virt.addr, walk.src.virt.addr,
+ nbytes, walk.iv);
+ kernel_fpu_end();
+
+ err = skcipher_walk_done(&walk, walk.nbytes - nbytes);
+
+ if (walk.nbytes > 0)
+ kernel_fpu_begin();
+ }
+
+ if (unlikely(tail > 0 && !err)) {
+ struct scatterlist sg_src[2], sg_dst[2];
+ struct scatterlist *src, *dst;
+
+ dst = src = scatterwalk_ffwd(sg_src, req->src, req->cryptlen);
+ if (req->dst != req->src)
+ dst = scatterwalk_ffwd(sg_dst, req->dst, req->cryptlen);
+
+ skcipher_request_set_crypt(req, src, dst, AES_BLOCK_SIZE + tail,
+ req->iv);
+
+ err = skcipher_walk_virt(&walk, &subreq, false);
+ if (err)
+ return err;
+
+ kernel_fpu_begin();
+ if (encrypt)
+ aesni_xts_encrypt(aes_ctx(ctx->raw_crypt_ctx),
+ walk.dst.virt.addr, walk.src.virt.addr,
+ walk.nbytes, walk.iv);
+ else
+ aesni_xts_decrypt(aes_ctx(ctx->raw_crypt_ctx),
+ walk.dst.virt.addr, walk.src.virt.addr,
+ walk.nbytes, walk.iv);
+ kernel_fpu_end();
+
+ err = skcipher_walk_done(&walk, 0);
+ }
+ return err;
+}
+
+static int xts_encrypt(struct skcipher_request *req)
+{
+ return xts_crypt(req, true);
+}
+
+static int xts_decrypt(struct skcipher_request *req)
+{
+ return xts_crypt(req, false);
+}
+
+static struct crypto_alg aesni_cipher_alg = {
+ .cra_name = "aes",
+ .cra_driver_name = "aes-aesni",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = CRYPTO_AES_CTX_SIZE,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .cipher = {
+ .cia_min_keysize = AES_MIN_KEY_SIZE,
+ .cia_max_keysize = AES_MAX_KEY_SIZE,
+ .cia_setkey = aes_set_key,
+ .cia_encrypt = aesni_encrypt,
+ .cia_decrypt = aesni_decrypt
+ }
+ }
+};
+
+static struct skcipher_alg aesni_skciphers[] = {
+ {
+ .base = {
+ .cra_name = "__ecb(aes)",
+ .cra_driver_name = "__ecb-aes-aesni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_INTERNAL,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = CRYPTO_AES_CTX_SIZE,
+ .cra_module = THIS_MODULE,
+ },
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = aesni_skcipher_setkey,
+ .encrypt = ecb_encrypt,
+ .decrypt = ecb_decrypt,
+ }, {
+ .base = {
+ .cra_name = "__cbc(aes)",
+ .cra_driver_name = "__cbc-aes-aesni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_INTERNAL,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = CRYPTO_AES_CTX_SIZE,
+ .cra_module = THIS_MODULE,
+ },
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = aesni_skcipher_setkey,
+ .encrypt = cbc_encrypt,
+ .decrypt = cbc_decrypt,
+ }, {
+ .base = {
+ .cra_name = "__cts(cbc(aes))",
+ .cra_driver_name = "__cts-cbc-aes-aesni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_INTERNAL,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = CRYPTO_AES_CTX_SIZE,
+ .cra_module = THIS_MODULE,
+ },
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .walksize = 2 * AES_BLOCK_SIZE,
+ .setkey = aesni_skcipher_setkey,
+ .encrypt = cts_cbc_encrypt,
+ .decrypt = cts_cbc_decrypt,
+#ifdef CONFIG_X86_64
+ }, {
+ .base = {
+ .cra_name = "__ctr(aes)",
+ .cra_driver_name = "__ctr-aes-aesni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_INTERNAL,
+ .cra_blocksize = 1,
+ .cra_ctxsize = CRYPTO_AES_CTX_SIZE,
+ .cra_module = THIS_MODULE,
+ },
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .chunksize = AES_BLOCK_SIZE,
+ .setkey = aesni_skcipher_setkey,
+ .encrypt = ctr_crypt,
+ .decrypt = ctr_crypt,
+#endif
+ }, {
+ .base = {
+ .cra_name = "__xts(aes)",
+ .cra_driver_name = "__xts-aes-aesni",
+ .cra_priority = 401,
+ .cra_flags = CRYPTO_ALG_INTERNAL,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = XTS_AES_CTX_SIZE,
+ .cra_module = THIS_MODULE,
+ },
+ .min_keysize = 2 * AES_MIN_KEY_SIZE,
+ .max_keysize = 2 * AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .walksize = 2 * AES_BLOCK_SIZE,
+ .setkey = xts_aesni_setkey,
+ .encrypt = xts_encrypt,
+ .decrypt = xts_decrypt,
+ }
+};
+
+static
+struct simd_skcipher_alg *aesni_simd_skciphers[ARRAY_SIZE(aesni_skciphers)];
+
+#ifdef CONFIG_X86_64
+/*
+ * XCTR does not have a non-AVX implementation, so it must be enabled
+ * conditionally.
+ */
+static struct skcipher_alg aesni_xctr = {
+ .base = {
+ .cra_name = "__xctr(aes)",
+ .cra_driver_name = "__xctr-aes-aesni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_INTERNAL,
+ .cra_blocksize = 1,
+ .cra_ctxsize = CRYPTO_AES_CTX_SIZE,
+ .cra_module = THIS_MODULE,
+ },
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .chunksize = AES_BLOCK_SIZE,
+ .setkey = aesni_skcipher_setkey,
+ .encrypt = xctr_crypt,
+ .decrypt = xctr_crypt,
+};
+
+static struct simd_skcipher_alg *aesni_simd_xctr;
+#endif /* CONFIG_X86_64 */
+
+#ifdef CONFIG_X86_64
+static int generic_gcmaes_set_key(struct crypto_aead *aead, const u8 *key,
+ unsigned int key_len)
+{
+ struct generic_gcmaes_ctx *ctx = generic_gcmaes_ctx_get(aead);
+
+ return aes_set_key_common(crypto_aead_tfm(aead),
+ &ctx->aes_key_expanded, key, key_len) ?:
+ rfc4106_set_hash_subkey(ctx->hash_subkey, key, key_len);
+}
+
+static int generic_gcmaes_encrypt(struct aead_request *req)
+{
+ struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+ struct generic_gcmaes_ctx *ctx = generic_gcmaes_ctx_get(tfm);
+ void *aes_ctx = &(ctx->aes_key_expanded);
+ u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8);
+ u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN);
+ __be32 counter = cpu_to_be32(1);
+
+ memcpy(iv, req->iv, 12);
+ *((__be32 *)(iv+12)) = counter;
+
+ return gcmaes_encrypt(req, req->assoclen, ctx->hash_subkey, iv,
+ aes_ctx);
+}
+
+static int generic_gcmaes_decrypt(struct aead_request *req)
+{
+ __be32 counter = cpu_to_be32(1);
+ struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+ struct generic_gcmaes_ctx *ctx = generic_gcmaes_ctx_get(tfm);
+ void *aes_ctx = &(ctx->aes_key_expanded);
+ u8 ivbuf[16 + (AESNI_ALIGN - 8)] __aligned(8);
+ u8 *iv = PTR_ALIGN(&ivbuf[0], AESNI_ALIGN);
+
+ memcpy(iv, req->iv, 12);
+ *((__be32 *)(iv+12)) = counter;
+
+ return gcmaes_decrypt(req, req->assoclen, ctx->hash_subkey, iv,
+ aes_ctx);
+}
+
+static struct aead_alg aesni_aeads[] = { {
+ .setkey = common_rfc4106_set_key,
+ .setauthsize = common_rfc4106_set_authsize,
+ .encrypt = helper_rfc4106_encrypt,
+ .decrypt = helper_rfc4106_decrypt,
+ .ivsize = GCM_RFC4106_IV_SIZE,
+ .maxauthsize = 16,
+ .base = {
+ .cra_name = "__rfc4106(gcm(aes))",
+ .cra_driver_name = "__rfc4106-gcm-aesni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_INTERNAL,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct aesni_rfc4106_gcm_ctx),
+ .cra_alignmask = 0,
+ .cra_module = THIS_MODULE,
+ },
+}, {
+ .setkey = generic_gcmaes_set_key,
+ .setauthsize = generic_gcmaes_set_authsize,
+ .encrypt = generic_gcmaes_encrypt,
+ .decrypt = generic_gcmaes_decrypt,
+ .ivsize = GCM_AES_IV_SIZE,
+ .maxauthsize = 16,
+ .base = {
+ .cra_name = "__gcm(aes)",
+ .cra_driver_name = "__generic-gcm-aesni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_INTERNAL,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct generic_gcmaes_ctx),
+ .cra_alignmask = 0,
+ .cra_module = THIS_MODULE,
+ },
+} };
+#else
+static struct aead_alg aesni_aeads[0];
+#endif
+
+static struct simd_aead_alg *aesni_simd_aeads[ARRAY_SIZE(aesni_aeads)];
+
+static const struct x86_cpu_id aesni_cpu_id[] = {
+ X86_MATCH_FEATURE(X86_FEATURE_AES, NULL),
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, aesni_cpu_id);
+
+static int __init aesni_init(void)
+{
+ int err;
+
+ if (!x86_match_cpu(aesni_cpu_id))
+ return -ENODEV;
+#ifdef CONFIG_X86_64
+ if (boot_cpu_has(X86_FEATURE_AVX2)) {
+ pr_info("AVX2 version of gcm_enc/dec engaged.\n");
+ static_branch_enable(&gcm_use_avx);
+ static_branch_enable(&gcm_use_avx2);
+ } else
+ if (boot_cpu_has(X86_FEATURE_AVX)) {
+ pr_info("AVX version of gcm_enc/dec engaged.\n");
+ static_branch_enable(&gcm_use_avx);
+ } else {
+ pr_info("SSE version of gcm_enc/dec engaged.\n");
+ }
+ if (boot_cpu_has(X86_FEATURE_AVX)) {
+ /* optimize performance of ctr mode encryption transform */
+ static_call_update(aesni_ctr_enc_tfm, aesni_ctr_enc_avx_tfm);
+ pr_info("AES CTR mode by8 optimization enabled\n");
+ }
+#endif /* CONFIG_X86_64 */
+
+ err = crypto_register_alg(&aesni_cipher_alg);
+ if (err)
+ return err;
+
+ err = simd_register_skciphers_compat(aesni_skciphers,
+ ARRAY_SIZE(aesni_skciphers),
+ aesni_simd_skciphers);
+ if (err)
+ goto unregister_cipher;
+
+ err = simd_register_aeads_compat(aesni_aeads, ARRAY_SIZE(aesni_aeads),
+ aesni_simd_aeads);
+ if (err)
+ goto unregister_skciphers;
+
+#ifdef CONFIG_X86_64
+ if (boot_cpu_has(X86_FEATURE_AVX))
+ err = simd_register_skciphers_compat(&aesni_xctr, 1,
+ &aesni_simd_xctr);
+ if (err)
+ goto unregister_aeads;
+#endif /* CONFIG_X86_64 */
+
+ return 0;
+
+#ifdef CONFIG_X86_64
+unregister_aeads:
+ simd_unregister_aeads(aesni_aeads, ARRAY_SIZE(aesni_aeads),
+ aesni_simd_aeads);
+#endif /* CONFIG_X86_64 */
+
+unregister_skciphers:
+ simd_unregister_skciphers(aesni_skciphers, ARRAY_SIZE(aesni_skciphers),
+ aesni_simd_skciphers);
+unregister_cipher:
+ crypto_unregister_alg(&aesni_cipher_alg);
+ return err;
+}
+
+static void __exit aesni_exit(void)
+{
+ simd_unregister_aeads(aesni_aeads, ARRAY_SIZE(aesni_aeads),
+ aesni_simd_aeads);
+ simd_unregister_skciphers(aesni_skciphers, ARRAY_SIZE(aesni_skciphers),
+ aesni_simd_skciphers);
+ crypto_unregister_alg(&aesni_cipher_alg);
+#ifdef CONFIG_X86_64
+ if (boot_cpu_has(X86_FEATURE_AVX))
+ simd_unregister_skciphers(&aesni_xctr, 1, &aesni_simd_xctr);
+#endif /* CONFIG_X86_64 */
+}
+
+late_initcall(aesni_init);
+module_exit(aesni_exit);
+
+MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_CRYPTO("aes");