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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/x86/crypto/aesni-intel_glue.c
Initial import
Diffstat (limited to 'arch/x86/crypto/aesni-intel_glue.c')
-rw-r--r--arch/x86/crypto/aesni-intel_glue.c1634
1 files changed, 1634 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..112cefacf
--- /dev/null
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -0,0 +1,1634 @@
+/*
+ * 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.
+ *
+ * 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.
+ */
+
+#include <linux/hardirq.h>
+#include <linux/types.h>
+#include <linux/crypto.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <crypto/algapi.h>
+#include <crypto/aes.h>
+#include <crypto/cryptd.h>
+#include <crypto/ctr.h>
+#include <crypto/b128ops.h>
+#include <crypto/lrw.h>
+#include <crypto/xts.h>
+#include <asm/cpu_device_id.h>
+#include <asm/i387.h>
+#include <asm/crypto/aes.h>
+#include <crypto/ablk_helper.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/internal/aead.h>
+#include <linux/workqueue.h>
+#include <linux/spinlock.h>
+#ifdef CONFIG_X86_64
+#include <asm/crypto/glue_helper.h>
+#endif
+
+
+/* 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];
+ struct crypto_aes_ctx aes_key_expanded;
+ u8 nonce[4];
+ struct cryptd_aead *cryptd_tfm;
+};
+
+struct aesni_gcm_set_hash_subkey_result {
+ int err;
+ struct completion completion;
+};
+
+struct aesni_hash_subkey_req_data {
+ u8 iv[16];
+ struct aesni_gcm_set_hash_subkey_result result;
+ struct scatterlist sg;
+};
+
+#define AESNI_ALIGN (16)
+#define AES_BLOCK_MASK (~(AES_BLOCK_SIZE-1))
+#define RFC4106_HASH_SUBKEY_SIZE 16
+
+struct aesni_lrw_ctx {
+ struct lrw_table_ctx lrw_table;
+ u8 raw_aes_ctx[sizeof(struct crypto_aes_ctx) + AESNI_ALIGN - 1];
+};
+
+struct aesni_xts_ctx {
+ u8 raw_tweak_ctx[sizeof(struct crypto_aes_ctx) + AESNI_ALIGN - 1];
+ u8 raw_crypt_ctx[sizeof(struct crypto_aes_ctx) + AESNI_ALIGN - 1];
+};
+
+asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
+ unsigned int key_len);
+asmlinkage void aesni_enc(struct crypto_aes_ctx *ctx, u8 *out,
+ const u8 *in);
+asmlinkage void aesni_dec(struct crypto_aes_ctx *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);
+
+int crypto_fpu_init(void);
+void crypto_fpu_exit(void);
+
+#define AVX_GEN2_OPTSIZE 640
+#define AVX_GEN4_OPTSIZE 4096
+
+#ifdef CONFIG_X86_64
+
+static void (*aesni_ctr_enc_tfm)(struct crypto_aes_ctx *ctx, u8 *out,
+ const u8 *in, unsigned int len, u8 *iv);
+asmlinkage void aesni_ctr_enc(struct crypto_aes_ctx *ctx, u8 *out,
+ const u8 *in, unsigned int len, u8 *iv);
+
+asmlinkage void aesni_xts_crypt8(struct crypto_aes_ctx *ctx, u8 *out,
+ const u8 *in, bool enc, u8 *iv);
+
+/* asmlinkage void aesni_gcm_enc()
+ * void *ctx, AES Key schedule. Starts on a 16 byte boundary.
+ * u8 *out, Ciphertext output. Encrypt in-place is allowed.
+ * const u8 *in, Plaintext input
+ * unsigned long plaintext_len, Length of data in bytes for encryption.
+ * u8 *iv, Pre-counter block j0: 4 byte salt (from Security Association)
+ * concatenated with 8 byte Initialisation Vector (from IPSec ESP
+ * Payload) concatenated with 0x00000001. 16-byte aligned pointer.
+ * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
+ * const u8 *aad, Additional Authentication Data (AAD)
+ * unsigned long aad_len, Length of AAD in bytes. With RFC4106 this
+ * is going to be 8 or 12 bytes
+ * u8 *auth_tag, Authenticated Tag output.
+ * unsigned long auth_tag_len), Authenticated Tag Length in bytes.
+ * Valid values are 16 (most likely), 12 or 8.
+ */
+asmlinkage void aesni_gcm_enc(void *ctx, u8 *out,
+ const u8 *in, unsigned long plaintext_len, u8 *iv,
+ u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
+ u8 *auth_tag, unsigned long auth_tag_len);
+
+/* asmlinkage void aesni_gcm_dec()
+ * void *ctx, AES Key schedule. Starts on a 16 byte boundary.
+ * u8 *out, Plaintext output. Decrypt in-place is allowed.
+ * const u8 *in, Ciphertext input
+ * unsigned long ciphertext_len, Length of data in bytes for decryption.
+ * u8 *iv, Pre-counter block j0: 4 byte salt (from Security Association)
+ * concatenated with 8 byte Initialisation Vector (from IPSec ESP
+ * Payload) concatenated with 0x00000001. 16-byte aligned pointer.
+ * u8 *hash_subkey, the Hash sub key input. Data starts on a 16-byte boundary.
+ * const u8 *aad, Additional Authentication Data (AAD)
+ * unsigned long aad_len, Length of AAD in bytes. With RFC4106 this is going
+ * to be 8 or 12 bytes
+ * u8 *auth_tag, Authenticated Tag output.
+ * unsigned long auth_tag_len) Authenticated Tag Length in bytes.
+ * Valid values are 16 (most likely), 12 or 8.
+ */
+asmlinkage void aesni_gcm_dec(void *ctx, u8 *out,
+ const u8 *in, unsigned long ciphertext_len, u8 *iv,
+ u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
+ u8 *auth_tag, unsigned long auth_tag_len);
+
+
+#ifdef CONFIG_AS_AVX
+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 aesni_gcm_precomp_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_precomp_avx_gen2(void *my_ctx_data, u8 *hash_subkey);
+
+asmlinkage void aesni_gcm_enc_avx_gen2(void *ctx, u8 *out,
+ const u8 *in, unsigned long plaintext_len, u8 *iv,
+ const u8 *aad, unsigned long aad_len,
+ u8 *auth_tag, unsigned long auth_tag_len);
+
+asmlinkage void aesni_gcm_dec_avx_gen2(void *ctx, u8 *out,
+ const u8 *in, unsigned long ciphertext_len, u8 *iv,
+ const u8 *aad, unsigned long aad_len,
+ u8 *auth_tag, unsigned long auth_tag_len);
+
+static void aesni_gcm_enc_avx(void *ctx, u8 *out,
+ const u8 *in, unsigned long plaintext_len, u8 *iv,
+ u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
+ u8 *auth_tag, unsigned long auth_tag_len)
+{
+ struct crypto_aes_ctx *aes_ctx = (struct crypto_aes_ctx*)ctx;
+ if ((plaintext_len < AVX_GEN2_OPTSIZE) || (aes_ctx-> key_length != AES_KEYSIZE_128)){
+ aesni_gcm_enc(ctx, out, in, plaintext_len, iv, hash_subkey, aad,
+ aad_len, auth_tag, auth_tag_len);
+ } else {
+ aesni_gcm_precomp_avx_gen2(ctx, hash_subkey);
+ aesni_gcm_enc_avx_gen2(ctx, out, in, plaintext_len, iv, aad,
+ aad_len, auth_tag, auth_tag_len);
+ }
+}
+
+static void aesni_gcm_dec_avx(void *ctx, u8 *out,
+ const u8 *in, unsigned long ciphertext_len, u8 *iv,
+ u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
+ u8 *auth_tag, unsigned long auth_tag_len)
+{
+ struct crypto_aes_ctx *aes_ctx = (struct crypto_aes_ctx*)ctx;
+ if ((ciphertext_len < AVX_GEN2_OPTSIZE) || (aes_ctx-> key_length != AES_KEYSIZE_128)) {
+ aesni_gcm_dec(ctx, out, in, ciphertext_len, iv, hash_subkey, aad,
+ aad_len, auth_tag, auth_tag_len);
+ } else {
+ aesni_gcm_precomp_avx_gen2(ctx, hash_subkey);
+ aesni_gcm_dec_avx_gen2(ctx, out, in, ciphertext_len, iv, aad,
+ aad_len, auth_tag, auth_tag_len);
+ }
+}
+#endif
+
+#ifdef CONFIG_AS_AVX2
+/*
+ * asmlinkage void aesni_gcm_precomp_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_precomp_avx_gen4(void *my_ctx_data, u8 *hash_subkey);
+
+asmlinkage void aesni_gcm_enc_avx_gen4(void *ctx, u8 *out,
+ const u8 *in, unsigned long plaintext_len, u8 *iv,
+ const u8 *aad, unsigned long aad_len,
+ u8 *auth_tag, unsigned long auth_tag_len);
+
+asmlinkage void aesni_gcm_dec_avx_gen4(void *ctx, u8 *out,
+ const u8 *in, unsigned long ciphertext_len, u8 *iv,
+ const u8 *aad, unsigned long aad_len,
+ u8 *auth_tag, unsigned long auth_tag_len);
+
+static void aesni_gcm_enc_avx2(void *ctx, u8 *out,
+ const u8 *in, unsigned long plaintext_len, u8 *iv,
+ u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
+ u8 *auth_tag, unsigned long auth_tag_len)
+{
+ struct crypto_aes_ctx *aes_ctx = (struct crypto_aes_ctx*)ctx;
+ if ((plaintext_len < AVX_GEN2_OPTSIZE) || (aes_ctx-> key_length != AES_KEYSIZE_128)) {
+ aesni_gcm_enc(ctx, out, in, plaintext_len, iv, hash_subkey, aad,
+ aad_len, auth_tag, auth_tag_len);
+ } else if (plaintext_len < AVX_GEN4_OPTSIZE) {
+ aesni_gcm_precomp_avx_gen2(ctx, hash_subkey);
+ aesni_gcm_enc_avx_gen2(ctx, out, in, plaintext_len, iv, aad,
+ aad_len, auth_tag, auth_tag_len);
+ } else {
+ aesni_gcm_precomp_avx_gen4(ctx, hash_subkey);
+ aesni_gcm_enc_avx_gen4(ctx, out, in, plaintext_len, iv, aad,
+ aad_len, auth_tag, auth_tag_len);
+ }
+}
+
+static void aesni_gcm_dec_avx2(void *ctx, u8 *out,
+ const u8 *in, unsigned long ciphertext_len, u8 *iv,
+ u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
+ u8 *auth_tag, unsigned long auth_tag_len)
+{
+ struct crypto_aes_ctx *aes_ctx = (struct crypto_aes_ctx*)ctx;
+ if ((ciphertext_len < AVX_GEN2_OPTSIZE) || (aes_ctx-> key_length != AES_KEYSIZE_128)) {
+ aesni_gcm_dec(ctx, out, in, ciphertext_len, iv, hash_subkey,
+ aad, aad_len, auth_tag, auth_tag_len);
+ } else if (ciphertext_len < AVX_GEN4_OPTSIZE) {
+ aesni_gcm_precomp_avx_gen2(ctx, hash_subkey);
+ aesni_gcm_dec_avx_gen2(ctx, out, in, ciphertext_len, iv, aad,
+ aad_len, auth_tag, auth_tag_len);
+ } else {
+ aesni_gcm_precomp_avx_gen4(ctx, hash_subkey);
+ aesni_gcm_dec_avx_gen4(ctx, out, in, ciphertext_len, iv, aad,
+ aad_len, auth_tag, auth_tag_len);
+ }
+}
+#endif
+
+static void (*aesni_gcm_enc_tfm)(void *ctx, u8 *out,
+ const u8 *in, unsigned long plaintext_len, u8 *iv,
+ u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
+ u8 *auth_tag, unsigned long auth_tag_len);
+
+static void (*aesni_gcm_dec_tfm)(void *ctx, u8 *out,
+ const u8 *in, unsigned long ciphertext_len, u8 *iv,
+ u8 *hash_subkey, const u8 *aad, unsigned long aad_len,
+ u8 *auth_tag, unsigned long auth_tag_len);
+
+static inline struct
+aesni_rfc4106_gcm_ctx *aesni_rfc4106_gcm_ctx_get(struct crypto_aead *tfm)
+{
+ return
+ (struct aesni_rfc4106_gcm_ctx *)
+ PTR_ALIGN((u8 *)
+ crypto_tfm_ctx(crypto_aead_tfm(tfm)), AESNI_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);
+ u32 *flags = &tfm->crt_flags;
+ int err;
+
+ if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 &&
+ key_len != AES_KEYSIZE_256) {
+ *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+ return -EINVAL;
+ }
+
+ if (!irq_fpu_usable())
+ err = crypto_aes_expand_key(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 aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
+
+ if (!irq_fpu_usable())
+ crypto_aes_encrypt_x86(ctx, dst, src);
+ else {
+ kernel_fpu_begin();
+ aesni_enc(ctx, dst, src);
+ kernel_fpu_end();
+ }
+}
+
+static void aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
+
+ if (!irq_fpu_usable())
+ crypto_aes_decrypt_x86(ctx, dst, src);
+ else {
+ kernel_fpu_begin();
+ aesni_dec(ctx, dst, src);
+ kernel_fpu_end();
+ }
+}
+
+static void __aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
+
+ aesni_enc(ctx, dst, src);
+}
+
+static void __aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src)
+{
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_tfm_ctx(tfm));
+
+ aesni_dec(ctx, dst, src);
+}
+
+static int ecb_encrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
+{
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
+ struct blkcipher_walk walk;
+ int err;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ err = blkcipher_walk_virt(desc, &walk);
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ kernel_fpu_begin();
+ while ((nbytes = walk.nbytes)) {
+ aesni_ecb_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
+ nbytes & AES_BLOCK_MASK);
+ nbytes &= AES_BLOCK_SIZE - 1;
+ err = blkcipher_walk_done(desc, &walk, nbytes);
+ }
+ kernel_fpu_end();
+
+ return err;
+}
+
+static int ecb_decrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
+{
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
+ struct blkcipher_walk walk;
+ int err;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ err = blkcipher_walk_virt(desc, &walk);
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ kernel_fpu_begin();
+ while ((nbytes = walk.nbytes)) {
+ aesni_ecb_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
+ nbytes & AES_BLOCK_MASK);
+ nbytes &= AES_BLOCK_SIZE - 1;
+ err = blkcipher_walk_done(desc, &walk, nbytes);
+ }
+ kernel_fpu_end();
+
+ return err;
+}
+
+static int cbc_encrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
+{
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
+ struct blkcipher_walk walk;
+ int err;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ err = blkcipher_walk_virt(desc, &walk);
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ kernel_fpu_begin();
+ while ((nbytes = walk.nbytes)) {
+ aesni_cbc_enc(ctx, walk.dst.virt.addr, walk.src.virt.addr,
+ nbytes & AES_BLOCK_MASK, walk.iv);
+ nbytes &= AES_BLOCK_SIZE - 1;
+ err = blkcipher_walk_done(desc, &walk, nbytes);
+ }
+ kernel_fpu_end();
+
+ return err;
+}
+
+static int cbc_decrypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
+{
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
+ struct blkcipher_walk walk;
+ int err;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ err = blkcipher_walk_virt(desc, &walk);
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ kernel_fpu_begin();
+ while ((nbytes = walk.nbytes)) {
+ aesni_cbc_dec(ctx, walk.dst.virt.addr, walk.src.virt.addr,
+ nbytes & AES_BLOCK_MASK, walk.iv);
+ nbytes &= AES_BLOCK_SIZE - 1;
+ err = blkcipher_walk_done(desc, &walk, nbytes);
+ }
+ kernel_fpu_end();
+
+ return err;
+}
+
+#ifdef CONFIG_X86_64
+static void ctr_crypt_final(struct crypto_aes_ctx *ctx,
+ struct blkcipher_walk *walk)
+{
+ u8 *ctrblk = walk->iv;
+ u8 keystream[AES_BLOCK_SIZE];
+ u8 *src = walk->src.virt.addr;
+ u8 *dst = walk->dst.virt.addr;
+ unsigned int nbytes = walk->nbytes;
+
+ aesni_enc(ctx, keystream, ctrblk);
+ crypto_xor(keystream, src, nbytes);
+ memcpy(dst, keystream, nbytes);
+ crypto_inc(ctrblk, AES_BLOCK_SIZE);
+}
+
+#ifdef CONFIG_AS_AVX
+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);
+}
+#endif
+
+static int ctr_crypt(struct blkcipher_desc *desc,
+ struct scatterlist *dst, struct scatterlist *src,
+ unsigned int nbytes)
+{
+ struct crypto_aes_ctx *ctx = aes_ctx(crypto_blkcipher_ctx(desc->tfm));
+ struct blkcipher_walk walk;
+ int err;
+
+ blkcipher_walk_init(&walk, dst, src, nbytes);
+ err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE);
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ kernel_fpu_begin();
+ while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) {
+ aesni_ctr_enc_tfm(ctx, walk.dst.virt.addr, walk.src.virt.addr,
+ nbytes & AES_BLOCK_MASK, walk.iv);
+ nbytes &= AES_BLOCK_SIZE - 1;
+ err = blkcipher_walk_done(desc, &walk, nbytes);
+ }
+ if (walk.nbytes) {
+ ctr_crypt_final(ctx, &walk);
+ err = blkcipher_walk_done(desc, &walk, 0);
+ }
+ kernel_fpu_end();
+
+ return err;
+}
+#endif
+
+static int ablk_ecb_init(struct crypto_tfm *tfm)
+{
+ return ablk_init_common(tfm, "__driver-ecb-aes-aesni");
+}
+
+static int ablk_cbc_init(struct crypto_tfm *tfm)
+{
+ return ablk_init_common(tfm, "__driver-cbc-aes-aesni");
+}
+
+#ifdef CONFIG_X86_64
+static int ablk_ctr_init(struct crypto_tfm *tfm)
+{
+ return ablk_init_common(tfm, "__driver-ctr-aes-aesni");
+}
+
+#endif
+
+#if IS_ENABLED(CONFIG_CRYPTO_PCBC)
+static int ablk_pcbc_init(struct crypto_tfm *tfm)
+{
+ return ablk_init_common(tfm, "fpu(pcbc(__driver-aes-aesni))");
+}
+#endif
+
+static void lrw_xts_encrypt_callback(void *ctx, u8 *blks, unsigned int nbytes)
+{
+ aesni_ecb_enc(ctx, blks, blks, nbytes);
+}
+
+static void lrw_xts_decrypt_callback(void *ctx, u8 *blks, unsigned int nbytes)
+{
+ aesni_ecb_dec(ctx, blks, blks, nbytes);
+}
+
+static int lrw_aesni_setkey(struct crypto_tfm *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct aesni_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
+ int err;
+
+ err = aes_set_key_common(tfm, ctx->raw_aes_ctx, key,
+ keylen - AES_BLOCK_SIZE);
+ if (err)
+ return err;
+
+ return lrw_init_table(&ctx->lrw_table, key + keylen - AES_BLOCK_SIZE);
+}
+
+static void lrw_aesni_exit_tfm(struct crypto_tfm *tfm)
+{
+ struct aesni_lrw_ctx *ctx = crypto_tfm_ctx(tfm);
+
+ lrw_free_table(&ctx->lrw_table);
+}
+
+static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct aesni_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ be128 buf[8];
+ struct lrw_crypt_req req = {
+ .tbuf = buf,
+ .tbuflen = sizeof(buf),
+
+ .table_ctx = &ctx->lrw_table,
+ .crypt_ctx = aes_ctx(ctx->raw_aes_ctx),
+ .crypt_fn = lrw_xts_encrypt_callback,
+ };
+ int ret;
+
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ kernel_fpu_begin();
+ ret = lrw_crypt(desc, dst, src, nbytes, &req);
+ kernel_fpu_end();
+
+ return ret;
+}
+
+static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct aesni_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ be128 buf[8];
+ struct lrw_crypt_req req = {
+ .tbuf = buf,
+ .tbuflen = sizeof(buf),
+
+ .table_ctx = &ctx->lrw_table,
+ .crypt_ctx = aes_ctx(ctx->raw_aes_ctx),
+ .crypt_fn = lrw_xts_decrypt_callback,
+ };
+ int ret;
+
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ kernel_fpu_begin();
+ ret = lrw_crypt(desc, dst, src, nbytes, &req);
+ kernel_fpu_end();
+
+ return ret;
+}
+
+static int xts_aesni_setkey(struct crypto_tfm *tfm, const u8 *key,
+ unsigned int keylen)
+{
+ struct aesni_xts_ctx *ctx = crypto_tfm_ctx(tfm);
+ u32 *flags = &tfm->crt_flags;
+ int err;
+
+ /* key consists of keys of equal size concatenated, therefore
+ * the length must be even
+ */
+ if (keylen % 2) {
+ *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN;
+ return -EINVAL;
+ }
+
+ /* first half of xts-key is for crypt */
+ err = aes_set_key_common(tfm, ctx->raw_crypt_ctx, key, keylen / 2);
+ if (err)
+ return err;
+
+ /* second half of xts-key is for tweak */
+ return aes_set_key_common(tfm, ctx->raw_tweak_ctx, key + keylen / 2,
+ keylen / 2);
+}
+
+
+static void aesni_xts_tweak(void *ctx, u8 *out, const u8 *in)
+{
+ aesni_enc(ctx, out, in);
+}
+
+#ifdef CONFIG_X86_64
+
+static void aesni_xts_enc(void *ctx, u128 *dst, const u128 *src, le128 *iv)
+{
+ glue_xts_crypt_128bit_one(ctx, dst, src, iv, GLUE_FUNC_CAST(aesni_enc));
+}
+
+static void aesni_xts_dec(void *ctx, u128 *dst, const u128 *src, le128 *iv)
+{
+ glue_xts_crypt_128bit_one(ctx, dst, src, iv, GLUE_FUNC_CAST(aesni_dec));
+}
+
+static void aesni_xts_enc8(void *ctx, u128 *dst, const u128 *src, le128 *iv)
+{
+ aesni_xts_crypt8(ctx, (u8 *)dst, (const u8 *)src, true, (u8 *)iv);
+}
+
+static void aesni_xts_dec8(void *ctx, u128 *dst, const u128 *src, le128 *iv)
+{
+ aesni_xts_crypt8(ctx, (u8 *)dst, (const u8 *)src, false, (u8 *)iv);
+}
+
+static const struct common_glue_ctx aesni_enc_xts = {
+ .num_funcs = 2,
+ .fpu_blocks_limit = 1,
+
+ .funcs = { {
+ .num_blocks = 8,
+ .fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_enc8) }
+ }, {
+ .num_blocks = 1,
+ .fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_enc) }
+ } }
+};
+
+static const struct common_glue_ctx aesni_dec_xts = {
+ .num_funcs = 2,
+ .fpu_blocks_limit = 1,
+
+ .funcs = { {
+ .num_blocks = 8,
+ .fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_dec8) }
+ }, {
+ .num_blocks = 1,
+ .fn_u = { .xts = GLUE_XTS_FUNC_CAST(aesni_xts_dec) }
+ } }
+};
+
+static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct aesni_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+
+ return glue_xts_crypt_128bit(&aesni_enc_xts, desc, dst, src, nbytes,
+ XTS_TWEAK_CAST(aesni_xts_tweak),
+ aes_ctx(ctx->raw_tweak_ctx),
+ aes_ctx(ctx->raw_crypt_ctx));
+}
+
+static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct aesni_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+
+ return glue_xts_crypt_128bit(&aesni_dec_xts, desc, dst, src, nbytes,
+ XTS_TWEAK_CAST(aesni_xts_tweak),
+ aes_ctx(ctx->raw_tweak_ctx),
+ aes_ctx(ctx->raw_crypt_ctx));
+}
+
+#else
+
+static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct aesni_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ be128 buf[8];
+ struct xts_crypt_req req = {
+ .tbuf = buf,
+ .tbuflen = sizeof(buf),
+
+ .tweak_ctx = aes_ctx(ctx->raw_tweak_ctx),
+ .tweak_fn = aesni_xts_tweak,
+ .crypt_ctx = aes_ctx(ctx->raw_crypt_ctx),
+ .crypt_fn = lrw_xts_encrypt_callback,
+ };
+ int ret;
+
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ kernel_fpu_begin();
+ ret = xts_crypt(desc, dst, src, nbytes, &req);
+ kernel_fpu_end();
+
+ return ret;
+}
+
+static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
+ struct scatterlist *src, unsigned int nbytes)
+{
+ struct aesni_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
+ be128 buf[8];
+ struct xts_crypt_req req = {
+ .tbuf = buf,
+ .tbuflen = sizeof(buf),
+
+ .tweak_ctx = aes_ctx(ctx->raw_tweak_ctx),
+ .tweak_fn = aesni_xts_tweak,
+ .crypt_ctx = aes_ctx(ctx->raw_crypt_ctx),
+ .crypt_fn = lrw_xts_decrypt_callback,
+ };
+ int ret;
+
+ desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ kernel_fpu_begin();
+ ret = xts_crypt(desc, dst, src, nbytes, &req);
+ kernel_fpu_end();
+
+ return ret;
+}
+
+#endif
+
+#ifdef CONFIG_X86_64
+static int rfc4106_init(struct crypto_tfm *tfm)
+{
+ struct cryptd_aead *cryptd_tfm;
+ struct aesni_rfc4106_gcm_ctx *ctx = (struct aesni_rfc4106_gcm_ctx *)
+ PTR_ALIGN((u8 *)crypto_tfm_ctx(tfm), AESNI_ALIGN);
+ struct crypto_aead *cryptd_child;
+ struct aesni_rfc4106_gcm_ctx *child_ctx;
+ cryptd_tfm = cryptd_alloc_aead("__driver-gcm-aes-aesni",
+ CRYPTO_ALG_INTERNAL,
+ CRYPTO_ALG_INTERNAL);
+ if (IS_ERR(cryptd_tfm))
+ return PTR_ERR(cryptd_tfm);
+
+ cryptd_child = cryptd_aead_child(cryptd_tfm);
+ child_ctx = aesni_rfc4106_gcm_ctx_get(cryptd_child);
+ memcpy(child_ctx, ctx, sizeof(*ctx));
+ ctx->cryptd_tfm = cryptd_tfm;
+ tfm->crt_aead.reqsize = sizeof(struct aead_request)
+ + crypto_aead_reqsize(&cryptd_tfm->base);
+ return 0;
+}
+
+static void rfc4106_exit(struct crypto_tfm *tfm)
+{
+ struct aesni_rfc4106_gcm_ctx *ctx =
+ (struct aesni_rfc4106_gcm_ctx *)
+ PTR_ALIGN((u8 *)crypto_tfm_ctx(tfm), AESNI_ALIGN);
+ if (!IS_ERR(ctx->cryptd_tfm))
+ cryptd_free_aead(ctx->cryptd_tfm);
+ return;
+}
+
+static void
+rfc4106_set_hash_subkey_done(struct crypto_async_request *req, int err)
+{
+ struct aesni_gcm_set_hash_subkey_result *result = req->data;
+
+ if (err == -EINPROGRESS)
+ return;
+ result->err = err;
+ complete(&result->completion);
+}
+
+static int
+rfc4106_set_hash_subkey(u8 *hash_subkey, const u8 *key, unsigned int key_len)
+{
+ struct crypto_ablkcipher *ctr_tfm;
+ struct ablkcipher_request *req;
+ int ret = -EINVAL;
+ struct aesni_hash_subkey_req_data *req_data;
+
+ ctr_tfm = crypto_alloc_ablkcipher("ctr(aes)", 0, 0);
+ if (IS_ERR(ctr_tfm))
+ return PTR_ERR(ctr_tfm);
+
+ crypto_ablkcipher_clear_flags(ctr_tfm, ~0);
+
+ ret = crypto_ablkcipher_setkey(ctr_tfm, key, key_len);
+ if (ret)
+ goto out_free_ablkcipher;
+
+ ret = -ENOMEM;
+ req = ablkcipher_request_alloc(ctr_tfm, GFP_KERNEL);
+ if (!req)
+ goto out_free_ablkcipher;
+
+ req_data = kmalloc(sizeof(*req_data), GFP_KERNEL);
+ if (!req_data)
+ goto out_free_request;
+
+ memset(req_data->iv, 0, sizeof(req_data->iv));
+
+ /* 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);
+
+ init_completion(&req_data->result.completion);
+ sg_init_one(&req_data->sg, hash_subkey, RFC4106_HASH_SUBKEY_SIZE);
+ ablkcipher_request_set_tfm(req, ctr_tfm);
+ ablkcipher_request_set_callback(req, CRYPTO_TFM_REQ_MAY_SLEEP |
+ CRYPTO_TFM_REQ_MAY_BACKLOG,
+ rfc4106_set_hash_subkey_done,
+ &req_data->result);
+
+ ablkcipher_request_set_crypt(req, &req_data->sg,
+ &req_data->sg, RFC4106_HASH_SUBKEY_SIZE, req_data->iv);
+
+ ret = crypto_ablkcipher_encrypt(req);
+ if (ret == -EINPROGRESS || ret == -EBUSY) {
+ ret = wait_for_completion_interruptible
+ (&req_data->result.completion);
+ if (!ret)
+ ret = req_data->result.err;
+ }
+ kfree(req_data);
+out_free_request:
+ ablkcipher_request_free(req);
+out_free_ablkcipher:
+ crypto_free_ablkcipher(ctr_tfm);
+ return ret;
+}
+
+static int common_rfc4106_set_key(struct crypto_aead *aead, const u8 *key,
+ unsigned int key_len)
+{
+ int ret = 0;
+ struct crypto_tfm *tfm = crypto_aead_tfm(aead);
+ struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(aead);
+ u8 *new_key_align, *new_key_mem = NULL;
+
+ if (key_len < 4) {
+ crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+ return -EINVAL;
+ }
+ /*Account for 4 byte nonce at the end.*/
+ key_len -= 4;
+ if (key_len != AES_KEYSIZE_128 && key_len != AES_KEYSIZE_192 &&
+ key_len != AES_KEYSIZE_256) {
+ crypto_tfm_set_flags(tfm, CRYPTO_TFM_RES_BAD_KEY_LEN);
+ return -EINVAL;
+ }
+
+ memcpy(ctx->nonce, key + key_len, sizeof(ctx->nonce));
+ /*This must be on a 16 byte boundary!*/
+ if ((unsigned long)(&(ctx->aes_key_expanded.key_enc[0])) % AESNI_ALIGN)
+ return -EINVAL;
+
+ if ((unsigned long)key % AESNI_ALIGN) {
+ /*key is not aligned: use an auxuliar aligned pointer*/
+ new_key_mem = kmalloc(key_len+AESNI_ALIGN, GFP_KERNEL);
+ if (!new_key_mem)
+ return -ENOMEM;
+
+ new_key_align = PTR_ALIGN(new_key_mem, AESNI_ALIGN);
+ memcpy(new_key_align, key, key_len);
+ key = new_key_align;
+ }
+
+ if (!irq_fpu_usable())
+ ret = crypto_aes_expand_key(&(ctx->aes_key_expanded),
+ key, key_len);
+ else {
+ kernel_fpu_begin();
+ ret = aesni_set_key(&(ctx->aes_key_expanded), key, key_len);
+ kernel_fpu_end();
+ }
+ /*This must be on a 16 byte boundary!*/
+ if ((unsigned long)(&(ctx->hash_subkey[0])) % AESNI_ALIGN) {
+ ret = -EINVAL;
+ goto exit;
+ }
+ ret = rfc4106_set_hash_subkey(ctx->hash_subkey, key, key_len);
+exit:
+ kfree(new_key_mem);
+ return ret;
+}
+
+static int rfc4106_set_key(struct crypto_aead *parent, const u8 *key,
+ unsigned int key_len)
+{
+ struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(parent);
+ struct crypto_aead *child = cryptd_aead_child(ctx->cryptd_tfm);
+ struct aesni_rfc4106_gcm_ctx *c_ctx = aesni_rfc4106_gcm_ctx_get(child);
+ struct cryptd_aead *cryptd_tfm = ctx->cryptd_tfm;
+ int ret;
+
+ ret = crypto_aead_setkey(child, key, key_len);
+ if (!ret) {
+ memcpy(ctx, c_ctx, sizeof(*ctx));
+ ctx->cryptd_tfm = cryptd_tfm;
+ }
+ return ret;
+}
+
+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;
+ }
+ crypto_aead_crt(aead)->authsize = authsize;
+ return 0;
+}
+
+/* This is the Integrity Check Value (aka the authentication tag length and can
+ * be 8, 12 or 16 bytes long. */
+static int rfc4106_set_authsize(struct crypto_aead *parent,
+ unsigned int authsize)
+{
+ struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(parent);
+ struct crypto_aead *child = cryptd_aead_child(ctx->cryptd_tfm);
+ int ret;
+
+ ret = crypto_aead_setauthsize(child, authsize);
+ if (!ret)
+ crypto_aead_crt(parent)->authsize = authsize;
+ return ret;
+}
+
+static int __driver_rfc4106_encrypt(struct aead_request *req)
+{
+ u8 one_entry_in_sg = 0;
+ u8 *src, *dst, *assoc;
+ __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);
+ u32 key_len = ctx->aes_key_expanded.key_length;
+ void *aes_ctx = &(ctx->aes_key_expanded);
+ unsigned long auth_tag_len = crypto_aead_authsize(tfm);
+ u8 iv_tab[16+AESNI_ALIGN];
+ u8* iv = (u8 *) PTR_ALIGN((u8 *)iv_tab, AESNI_ALIGN);
+ struct scatter_walk src_sg_walk;
+ struct scatter_walk assoc_sg_walk;
+ struct scatter_walk dst_sg_walk;
+ unsigned int i;
+
+ /* Assuming we are supporting rfc4106 64-bit extended */
+ /* sequence numbers We need to have the AAD length equal */
+ /* to 8 or 12 bytes */
+ if (unlikely(req->assoclen != 8 && req->assoclen != 12))
+ return -EINVAL;
+ if (unlikely(auth_tag_len != 8 && auth_tag_len != 12 && auth_tag_len != 16))
+ return -EINVAL;
+ if (unlikely(key_len != AES_KEYSIZE_128 &&
+ key_len != AES_KEYSIZE_192 &&
+ key_len != AES_KEYSIZE_256))
+ 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;
+
+ if ((sg_is_last(req->src)) && (sg_is_last(req->assoc))) {
+ one_entry_in_sg = 1;
+ scatterwalk_start(&src_sg_walk, req->src);
+ scatterwalk_start(&assoc_sg_walk, req->assoc);
+ src = scatterwalk_map(&src_sg_walk);
+ assoc = scatterwalk_map(&assoc_sg_walk);
+ dst = src;
+ if (unlikely(req->src != req->dst)) {
+ scatterwalk_start(&dst_sg_walk, req->dst);
+ dst = scatterwalk_map(&dst_sg_walk);
+ }
+
+ } else {
+ /* Allocate memory for src, dst, assoc */
+ src = kmalloc(req->cryptlen + auth_tag_len + req->assoclen,
+ GFP_ATOMIC);
+ if (unlikely(!src))
+ return -ENOMEM;
+ assoc = (src + req->cryptlen + auth_tag_len);
+ scatterwalk_map_and_copy(src, req->src, 0, req->cryptlen, 0);
+ scatterwalk_map_and_copy(assoc, req->assoc, 0,
+ req->assoclen, 0);
+ dst = src;
+ }
+
+ aesni_gcm_enc_tfm(aes_ctx, dst, src, (unsigned long)req->cryptlen, iv,
+ ctx->hash_subkey, assoc, (unsigned long)req->assoclen, dst
+ + ((unsigned long)req->cryptlen), auth_tag_len);
+
+ /* The authTag (aka the Integrity Check Value) needs to be written
+ * back to the packet. */
+ if (one_entry_in_sg) {
+ if (unlikely(req->src != req->dst)) {
+ scatterwalk_unmap(dst);
+ scatterwalk_done(&dst_sg_walk, 0, 0);
+ }
+ scatterwalk_unmap(src);
+ scatterwalk_unmap(assoc);
+ scatterwalk_done(&src_sg_walk, 0, 0);
+ scatterwalk_done(&assoc_sg_walk, 0, 0);
+ } else {
+ scatterwalk_map_and_copy(dst, req->dst, 0,
+ req->cryptlen + auth_tag_len, 1);
+ kfree(src);
+ }
+ return 0;
+}
+
+static int __driver_rfc4106_decrypt(struct aead_request *req)
+{
+ u8 one_entry_in_sg = 0;
+ u8 *src, *dst, *assoc;
+ unsigned long tempCipherLen = 0;
+ __be32 counter = cpu_to_be32(1);
+ int retval = 0;
+ struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+ struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
+ u32 key_len = ctx->aes_key_expanded.key_length;
+ void *aes_ctx = &(ctx->aes_key_expanded);
+ unsigned long auth_tag_len = crypto_aead_authsize(tfm);
+ u8 iv_and_authTag[32+AESNI_ALIGN];
+ u8 *iv = (u8 *) PTR_ALIGN((u8 *)iv_and_authTag, AESNI_ALIGN);
+ u8 *authTag = iv + 16;
+ struct scatter_walk src_sg_walk;
+ struct scatter_walk assoc_sg_walk;
+ struct scatter_walk dst_sg_walk;
+ unsigned int i;
+
+ if (unlikely((req->cryptlen < auth_tag_len) ||
+ (req->assoclen != 8 && req->assoclen != 12)))
+ return -EINVAL;
+ if (unlikely(auth_tag_len != 8 && auth_tag_len != 12 && auth_tag_len != 16))
+ return -EINVAL;
+ if (unlikely(key_len != AES_KEYSIZE_128 &&
+ key_len != AES_KEYSIZE_192 &&
+ key_len != AES_KEYSIZE_256))
+ return -EINVAL;
+
+ /* Assuming we are supporting rfc4106 64-bit extended */
+ /* sequence numbers We need to have the AAD length */
+ /* equal to 8 or 12 bytes */
+
+ tempCipherLen = (unsigned long)(req->cryptlen - auth_tag_len);
+ /* 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;
+
+ if ((sg_is_last(req->src)) && (sg_is_last(req->assoc))) {
+ one_entry_in_sg = 1;
+ scatterwalk_start(&src_sg_walk, req->src);
+ scatterwalk_start(&assoc_sg_walk, req->assoc);
+ src = scatterwalk_map(&src_sg_walk);
+ assoc = scatterwalk_map(&assoc_sg_walk);
+ dst = src;
+ if (unlikely(req->src != req->dst)) {
+ scatterwalk_start(&dst_sg_walk, req->dst);
+ dst = scatterwalk_map(&dst_sg_walk);
+ }
+
+ } else {
+ /* Allocate memory for src, dst, assoc */
+ src = kmalloc(req->cryptlen + req->assoclen, GFP_ATOMIC);
+ if (!src)
+ return -ENOMEM;
+ assoc = (src + req->cryptlen);
+ scatterwalk_map_and_copy(src, req->src, 0, req->cryptlen, 0);
+ scatterwalk_map_and_copy(assoc, req->assoc, 0,
+ req->assoclen, 0);
+ dst = src;
+ }
+
+ aesni_gcm_dec_tfm(aes_ctx, dst, src, tempCipherLen, iv,
+ ctx->hash_subkey, assoc, (unsigned long)req->assoclen,
+ authTag, auth_tag_len);
+
+ /* Compare generated tag with passed in tag. */
+ retval = crypto_memneq(src + tempCipherLen, authTag, auth_tag_len) ?
+ -EBADMSG : 0;
+
+ if (one_entry_in_sg) {
+ if (unlikely(req->src != req->dst)) {
+ scatterwalk_unmap(dst);
+ scatterwalk_done(&dst_sg_walk, 0, 0);
+ }
+ scatterwalk_unmap(src);
+ scatterwalk_unmap(assoc);
+ scatterwalk_done(&src_sg_walk, 0, 0);
+ scatterwalk_done(&assoc_sg_walk, 0, 0);
+ } else {
+ scatterwalk_map_and_copy(dst, req->dst, 0, tempCipherLen, 1);
+ kfree(src);
+ }
+ return retval;
+}
+
+static int rfc4106_encrypt(struct aead_request *req)
+{
+ int ret;
+ struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+ struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
+
+ if (!irq_fpu_usable()) {
+ struct aead_request *cryptd_req =
+ (struct aead_request *) aead_request_ctx(req);
+
+ memcpy(cryptd_req, req, sizeof(*req));
+ aead_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
+ ret = crypto_aead_encrypt(cryptd_req);
+ } else {
+ kernel_fpu_begin();
+ ret = __driver_rfc4106_encrypt(req);
+ kernel_fpu_end();
+ }
+ return ret;
+}
+
+static int rfc4106_decrypt(struct aead_request *req)
+{
+ int ret;
+ struct crypto_aead *tfm = crypto_aead_reqtfm(req);
+ struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(tfm);
+
+ if (!irq_fpu_usable()) {
+ struct aead_request *cryptd_req =
+ (struct aead_request *) aead_request_ctx(req);
+
+ memcpy(cryptd_req, req, sizeof(*req));
+ aead_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base);
+ ret = crypto_aead_decrypt(cryptd_req);
+ } else {
+ kernel_fpu_begin();
+ ret = __driver_rfc4106_decrypt(req);
+ kernel_fpu_end();
+ }
+ return ret;
+}
+
+static int helper_rfc4106_encrypt(struct aead_request *req)
+{
+ int ret;
+
+ if (unlikely(!irq_fpu_usable())) {
+ WARN_ONCE(1, "__gcm-aes-aesni alg used in invalid context");
+ ret = -EINVAL;
+ } else {
+ kernel_fpu_begin();
+ ret = __driver_rfc4106_encrypt(req);
+ kernel_fpu_end();
+ }
+ return ret;
+}
+
+static int helper_rfc4106_decrypt(struct aead_request *req)
+{
+ int ret;
+
+ if (unlikely(!irq_fpu_usable())) {
+ WARN_ONCE(1, "__gcm-aes-aesni alg used in invalid context");
+ ret = -EINVAL;
+ } else {
+ kernel_fpu_begin();
+ ret = __driver_rfc4106_decrypt(req);
+ kernel_fpu_end();
+ }
+ return ret;
+}
+#endif
+
+static struct crypto_alg aesni_algs[] = { {
+ .cra_name = "aes",
+ .cra_driver_name = "aes-aesni",
+ .cra_priority = 300,
+ .cra_flags = CRYPTO_ALG_TYPE_CIPHER,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct crypto_aes_ctx) +
+ AESNI_ALIGN - 1,
+ .cra_alignmask = 0,
+ .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 = aes_encrypt,
+ .cia_decrypt = aes_decrypt
+ }
+ }
+}, {
+ .cra_name = "__aes-aesni",
+ .cra_driver_name = "__driver-aes-aesni",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_CIPHER | CRYPTO_ALG_INTERNAL,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct crypto_aes_ctx) +
+ AESNI_ALIGN - 1,
+ .cra_alignmask = 0,
+ .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 = __aes_encrypt,
+ .cia_decrypt = __aes_decrypt
+ }
+ }
+}, {
+ .cra_name = "__ecb-aes-aesni",
+ .cra_driver_name = "__driver-ecb-aes-aesni",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
+ CRYPTO_ALG_INTERNAL,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct crypto_aes_ctx) +
+ AESNI_ALIGN - 1,
+ .cra_alignmask = 0,
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = aes_set_key,
+ .encrypt = ecb_encrypt,
+ .decrypt = ecb_decrypt,
+ },
+ },
+}, {
+ .cra_name = "__cbc-aes-aesni",
+ .cra_driver_name = "__driver-cbc-aes-aesni",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
+ CRYPTO_ALG_INTERNAL,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct crypto_aes_ctx) +
+ AESNI_ALIGN - 1,
+ .cra_alignmask = 0,
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = aes_set_key,
+ .encrypt = cbc_encrypt,
+ .decrypt = cbc_decrypt,
+ },
+ },
+}, {
+ .cra_name = "ecb(aes)",
+ .cra_driver_name = "ecb-aes-aesni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = ablk_ecb_init,
+ .cra_exit = ablk_exit,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .setkey = ablk_set_key,
+ .encrypt = ablk_encrypt,
+ .decrypt = ablk_decrypt,
+ },
+ },
+}, {
+ .cra_name = "cbc(aes)",
+ .cra_driver_name = "cbc-aes-aesni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = ablk_cbc_init,
+ .cra_exit = ablk_exit,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = ablk_set_key,
+ .encrypt = ablk_encrypt,
+ .decrypt = ablk_decrypt,
+ },
+ },
+#ifdef CONFIG_X86_64
+}, {
+ .cra_name = "__ctr-aes-aesni",
+ .cra_driver_name = "__driver-ctr-aes-aesni",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
+ CRYPTO_ALG_INTERNAL,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct crypto_aes_ctx) +
+ AESNI_ALIGN - 1,
+ .cra_alignmask = 0,
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = aes_set_key,
+ .encrypt = ctr_crypt,
+ .decrypt = ctr_crypt,
+ },
+ },
+}, {
+ .cra_name = "ctr(aes)",
+ .cra_driver_name = "ctr-aes-aesni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = ablk_ctr_init,
+ .cra_exit = ablk_exit,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = ablk_set_key,
+ .encrypt = ablk_encrypt,
+ .decrypt = ablk_encrypt,
+ .geniv = "chainiv",
+ },
+ },
+}, {
+ .cra_name = "__gcm-aes-aesni",
+ .cra_driver_name = "__driver-gcm-aes-aesni",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_INTERNAL,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct aesni_rfc4106_gcm_ctx) +
+ AESNI_ALIGN,
+ .cra_alignmask = 0,
+ .cra_type = &crypto_aead_type,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .aead = {
+ .setkey = common_rfc4106_set_key,
+ .setauthsize = common_rfc4106_set_authsize,
+ .encrypt = helper_rfc4106_encrypt,
+ .decrypt = helper_rfc4106_decrypt,
+ .ivsize = 8,
+ .maxauthsize = 16,
+ },
+ },
+}, {
+ .cra_name = "rfc4106(gcm(aes))",
+ .cra_driver_name = "rfc4106-gcm-aesni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_AEAD | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = 1,
+ .cra_ctxsize = sizeof(struct aesni_rfc4106_gcm_ctx) +
+ AESNI_ALIGN,
+ .cra_alignmask = 0,
+ .cra_type = &crypto_nivaead_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = rfc4106_init,
+ .cra_exit = rfc4106_exit,
+ .cra_u = {
+ .aead = {
+ .setkey = rfc4106_set_key,
+ .setauthsize = rfc4106_set_authsize,
+ .encrypt = rfc4106_encrypt,
+ .decrypt = rfc4106_decrypt,
+ .geniv = "seqiv",
+ .ivsize = 8,
+ .maxauthsize = 16,
+ },
+ },
+#endif
+#if IS_ENABLED(CONFIG_CRYPTO_PCBC)
+}, {
+ .cra_name = "pcbc(aes)",
+ .cra_driver_name = "pcbc-aes-aesni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = ablk_pcbc_init,
+ .cra_exit = ablk_exit,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = ablk_set_key,
+ .encrypt = ablk_encrypt,
+ .decrypt = ablk_decrypt,
+ },
+ },
+#endif
+}, {
+ .cra_name = "__lrw-aes-aesni",
+ .cra_driver_name = "__driver-lrw-aes-aesni",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
+ CRYPTO_ALG_INTERNAL,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct aesni_lrw_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_exit = lrw_aesni_exit_tfm,
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE + AES_BLOCK_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE + AES_BLOCK_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = lrw_aesni_setkey,
+ .encrypt = lrw_encrypt,
+ .decrypt = lrw_decrypt,
+ },
+ },
+}, {
+ .cra_name = "__xts-aes-aesni",
+ .cra_driver_name = "__driver-xts-aes-aesni",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER |
+ CRYPTO_ALG_INTERNAL,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct aesni_xts_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_blkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_u = {
+ .blkcipher = {
+ .min_keysize = 2 * AES_MIN_KEY_SIZE,
+ .max_keysize = 2 * AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = xts_aesni_setkey,
+ .encrypt = xts_encrypt,
+ .decrypt = xts_decrypt,
+ },
+ },
+}, {
+ .cra_name = "lrw(aes)",
+ .cra_driver_name = "lrw-aes-aesni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = ablk_init,
+ .cra_exit = ablk_exit,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = AES_MIN_KEY_SIZE + AES_BLOCK_SIZE,
+ .max_keysize = AES_MAX_KEY_SIZE + AES_BLOCK_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = ablk_set_key,
+ .encrypt = ablk_encrypt,
+ .decrypt = ablk_decrypt,
+ },
+ },
+}, {
+ .cra_name = "xts(aes)",
+ .cra_driver_name = "xts-aes-aesni",
+ .cra_priority = 400,
+ .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC,
+ .cra_blocksize = AES_BLOCK_SIZE,
+ .cra_ctxsize = sizeof(struct async_helper_ctx),
+ .cra_alignmask = 0,
+ .cra_type = &crypto_ablkcipher_type,
+ .cra_module = THIS_MODULE,
+ .cra_init = ablk_init,
+ .cra_exit = ablk_exit,
+ .cra_u = {
+ .ablkcipher = {
+ .min_keysize = 2 * AES_MIN_KEY_SIZE,
+ .max_keysize = 2 * AES_MAX_KEY_SIZE,
+ .ivsize = AES_BLOCK_SIZE,
+ .setkey = ablk_set_key,
+ .encrypt = ablk_encrypt,
+ .decrypt = ablk_decrypt,
+ },
+ },
+} };
+
+
+static const struct x86_cpu_id aesni_cpu_id[] = {
+ X86_FEATURE_MATCH(X86_FEATURE_AES),
+ {}
+};
+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
+#ifdef CONFIG_AS_AVX2
+ if (boot_cpu_has(X86_FEATURE_AVX2)) {
+ pr_info("AVX2 version of gcm_enc/dec engaged.\n");
+ aesni_gcm_enc_tfm = aesni_gcm_enc_avx2;
+ aesni_gcm_dec_tfm = aesni_gcm_dec_avx2;
+ } else
+#endif
+#ifdef CONFIG_AS_AVX
+ if (boot_cpu_has(X86_FEATURE_AVX)) {
+ pr_info("AVX version of gcm_enc/dec engaged.\n");
+ aesni_gcm_enc_tfm = aesni_gcm_enc_avx;
+ aesni_gcm_dec_tfm = aesni_gcm_dec_avx;
+ } else
+#endif
+ {
+ pr_info("SSE version of gcm_enc/dec engaged.\n");
+ aesni_gcm_enc_tfm = aesni_gcm_enc;
+ aesni_gcm_dec_tfm = aesni_gcm_dec;
+ }
+ aesni_ctr_enc_tfm = aesni_ctr_enc;
+#ifdef CONFIG_AS_AVX
+ if (cpu_has_avx) {
+ /* optimize performance of ctr mode encryption transform */
+ aesni_ctr_enc_tfm = aesni_ctr_enc_avx_tfm;
+ pr_info("AES CTR mode by8 optimization enabled\n");
+ }
+#endif
+#endif
+
+ err = crypto_fpu_init();
+ if (err)
+ return err;
+
+ return crypto_register_algs(aesni_algs, ARRAY_SIZE(aesni_algs));
+}
+
+static void __exit aesni_exit(void)
+{
+ crypto_unregister_algs(aesni_algs, ARRAY_SIZE(aesni_algs));
+
+ crypto_fpu_exit();
+}
+
+module_init(aesni_init);
+module_exit(aesni_exit);
+
+MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_CRYPTO("aes");