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-rw-r--r--arch/x86/crypto/aesni-intel_glue.c540
1 files changed, 533 insertions, 7 deletions
diff --git a/arch/x86/crypto/aesni-intel_glue.c b/arch/x86/crypto/aesni-intel_glue.c
index 2cb3dcc4490a..e1e60c7d5813 100644
--- a/arch/x86/crypto/aesni-intel_glue.c
+++ b/arch/x86/crypto/aesni-intel_glue.c
@@ -5,6 +5,14 @@
* 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
@@ -21,6 +29,10 @@
#include <crypto/ctr.h>
#include <asm/i387.h>
#include <asm/aes.h>
+#include <crypto/scatterwalk.h>
+#include <crypto/internal/aead.h>
+#include <linux/workqueue.h>
+#include <linux/spinlock.h>
#if defined(CONFIG_CRYPTO_CTR) || defined(CONFIG_CRYPTO_CTR_MODULE)
#define HAS_CTR
@@ -42,8 +54,31 @@ struct async_aes_ctx {
struct cryptd_ablkcipher *cryptd_tfm;
};
-#define AESNI_ALIGN 16
+/* 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
asmlinkage int aesni_set_key(struct crypto_aes_ctx *ctx, const u8 *in_key,
unsigned int key_len);
@@ -59,9 +94,62 @@ 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);
+#ifdef CONFIG_X86_64
asmlinkage void aesni_ctr_enc(struct crypto_aes_ctx *ctx, u8 *out,
const u8 *in, unsigned int len, 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);
+
+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;
@@ -324,6 +412,7 @@ static struct crypto_alg blk_cbc_alg = {
},
};
+#ifdef CONFIG_X86_64
static void ctr_crypt_final(struct crypto_aes_ctx *ctx,
struct blkcipher_walk *walk)
{
@@ -389,6 +478,7 @@ static struct crypto_alg blk_ctr_alg = {
},
},
};
+#endif
static int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key,
unsigned int key_len)
@@ -536,6 +626,7 @@ static struct crypto_alg ablk_cbc_alg = {
},
};
+#ifdef CONFIG_X86_64
static int ablk_ctr_init(struct crypto_tfm *tfm)
{
struct cryptd_ablkcipher *cryptd_tfm;
@@ -612,6 +703,7 @@ static struct crypto_alg ablk_rfc3686_ctr_alg = {
},
};
#endif
+#endif
#ifdef HAS_LRW
static int ablk_lrw_init(struct crypto_tfm *tfm)
@@ -730,6 +822,424 @@ static struct crypto_alg ablk_xts_alg = {
};
#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);
+ cryptd_tfm = cryptd_alloc_aead("__driver-gcm-aes-aesni", 0, 0);
+ if (IS_ERR(cryptd_tfm))
+ return PTR_ERR(cryptd_tfm);
+ 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) {
+ crypto_free_ablkcipher(ctr_tfm);
+ return ret;
+ }
+
+ req = ablkcipher_request_alloc(ctr_tfm, GFP_KERNEL);
+ if (!req) {
+ crypto_free_ablkcipher(ctr_tfm);
+ return -EINVAL;
+ }
+
+ req_data = kmalloc(sizeof(*req_data), GFP_KERNEL);
+ if (!req_data) {
+ crypto_free_ablkcipher(ctr_tfm);
+ return -ENOMEM;
+ }
+ 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;
+ }
+ ablkcipher_request_free(req);
+ kfree(req_data);
+ crypto_free_ablkcipher(ctr_tfm);
+ return ret;
+}
+
+static int rfc4106_set_key(struct crypto_aead *parent, const u8 *key,
+ unsigned int key_len)
+{
+ int ret = 0;
+ struct crypto_tfm *tfm = crypto_aead_tfm(parent);
+ struct aesni_rfc4106_gcm_ctx *ctx = aesni_rfc4106_gcm_ctx_get(parent);
+ u8 *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) {
+ 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_mem = PTR_ALIGN(new_key_mem, AESNI_ALIGN);
+ memcpy(new_key_mem, key, key_len);
+ key = new_key_mem;
+ }
+
+ 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;
+}
+
+/* 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 *cryptd_child = cryptd_aead_child(ctx->cryptd_tfm);
+
+ switch (authsize) {
+ case 8:
+ case 12:
+ case 16:
+ break;
+ default:
+ return -EINVAL;
+ }
+ crypto_aead_crt(parent)->authsize = authsize;
+ crypto_aead_crt(cryptd_child)->authsize = authsize;
+ return 0;
+}
+
+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);
+ struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_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);
+ return crypto_aead_encrypt(cryptd_req);
+ } else {
+ kernel_fpu_begin();
+ ret = cryptd_child->base.crt_aead.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);
+ struct crypto_aead *cryptd_child = cryptd_aead_child(ctx->cryptd_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);
+ return crypto_aead_decrypt(cryptd_req);
+ } else {
+ kernel_fpu_begin();
+ ret = cryptd_child->base.crt_aead.decrypt(req);
+ kernel_fpu_end();
+ return ret;
+ }
+}
+
+static struct crypto_alg rfc4106_alg = {
+ .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_list = LIST_HEAD_INIT(rfc4106_alg.cra_list),
+ .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,
+ },
+ },
+};
+
+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);
+ 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;
+ /* 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, 0);
+ assoc = scatterwalk_map(&assoc_sg_walk, 0);
+ dst = src;
+ if (unlikely(req->src != req->dst)) {
+ scatterwalk_start(&dst_sg_walk, req->dst);
+ dst = scatterwalk_map(&dst_sg_walk, 0);
+ }
+
+ } 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(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, 0);
+ scatterwalk_done(&dst_sg_walk, 0, 0);
+ }
+ scatterwalk_unmap(src, 0);
+ scatterwalk_unmap(assoc, 0);
+ 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);
+ 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;
+ /* 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, 0);
+ assoc = scatterwalk_map(&assoc_sg_walk, 0);
+ dst = src;
+ if (unlikely(req->src != req->dst)) {
+ scatterwalk_start(&dst_sg_walk, req->dst);
+ dst = scatterwalk_map(&dst_sg_walk, 0);
+ }
+
+ } else {
+ /* Allocate memory for src, dst, assoc */
+ src = kmalloc(req->cryptlen + req->assoclen, GFP_ATOMIC);
+ if (!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_dec(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 = memcmp(src + tempCipherLen, authTag, auth_tag_len) ?
+ -EBADMSG : 0;
+
+ if (one_entry_in_sg) {
+ if (unlikely(req->src != req->dst)) {
+ scatterwalk_unmap(dst, 0);
+ scatterwalk_done(&dst_sg_walk, 0, 0);
+ }
+ scatterwalk_unmap(src, 0);
+ scatterwalk_unmap(assoc, 0);
+ 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, 1);
+ kfree(src);
+ }
+ return retval;
+}
+
+static struct crypto_alg __rfc4106_alg = {
+ .cra_name = "__gcm-aes-aesni",
+ .cra_driver_name = "__driver-gcm-aes-aesni",
+ .cra_priority = 0,
+ .cra_flags = CRYPTO_ALG_TYPE_AEAD,
+ .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_list = LIST_HEAD_INIT(__rfc4106_alg.cra_list),
+ .cra_u = {
+ .aead = {
+ .encrypt = __driver_rfc4106_encrypt,
+ .decrypt = __driver_rfc4106_decrypt,
+ },
+ },
+};
+#endif
+
static int __init aesni_init(void)
{
int err;
@@ -738,6 +1248,7 @@ static int __init aesni_init(void)
printk(KERN_INFO "Intel AES-NI instructions are not detected.\n");
return -ENODEV;
}
+
if ((err = crypto_register_alg(&aesni_alg)))
goto aes_err;
if ((err = crypto_register_alg(&__aesni_alg)))
@@ -746,18 +1257,24 @@ static int __init aesni_init(void)
goto blk_ecb_err;
if ((err = crypto_register_alg(&blk_cbc_alg)))
goto blk_cbc_err;
- if ((err = crypto_register_alg(&blk_ctr_alg)))
- goto blk_ctr_err;
if ((err = crypto_register_alg(&ablk_ecb_alg)))
goto ablk_ecb_err;
if ((err = crypto_register_alg(&ablk_cbc_alg)))
goto ablk_cbc_err;
+#ifdef CONFIG_X86_64
+ if ((err = crypto_register_alg(&blk_ctr_alg)))
+ goto blk_ctr_err;
if ((err = crypto_register_alg(&ablk_ctr_alg)))
goto ablk_ctr_err;
+ if ((err = crypto_register_alg(&__rfc4106_alg)))
+ goto __aead_gcm_err;
+ if ((err = crypto_register_alg(&rfc4106_alg)))
+ goto aead_gcm_err;
#ifdef HAS_CTR
if ((err = crypto_register_alg(&ablk_rfc3686_ctr_alg)))
goto ablk_rfc3686_ctr_err;
#endif
+#endif
#ifdef HAS_LRW
if ((err = crypto_register_alg(&ablk_lrw_alg)))
goto ablk_lrw_err;
@@ -770,7 +1287,6 @@ static int __init aesni_init(void)
if ((err = crypto_register_alg(&ablk_xts_alg)))
goto ablk_xts_err;
#endif
-
return err;
#ifdef HAS_XTS
@@ -784,18 +1300,24 @@ ablk_pcbc_err:
crypto_unregister_alg(&ablk_lrw_alg);
ablk_lrw_err:
#endif
+#ifdef CONFIG_X86_64
#ifdef HAS_CTR
crypto_unregister_alg(&ablk_rfc3686_ctr_alg);
ablk_rfc3686_ctr_err:
#endif
+ crypto_unregister_alg(&rfc4106_alg);
+aead_gcm_err:
+ crypto_unregister_alg(&__rfc4106_alg);
+__aead_gcm_err:
crypto_unregister_alg(&ablk_ctr_alg);
ablk_ctr_err:
+ crypto_unregister_alg(&blk_ctr_alg);
+blk_ctr_err:
+#endif
crypto_unregister_alg(&ablk_cbc_alg);
ablk_cbc_err:
crypto_unregister_alg(&ablk_ecb_alg);
ablk_ecb_err:
- crypto_unregister_alg(&blk_ctr_alg);
-blk_ctr_err:
crypto_unregister_alg(&blk_cbc_alg);
blk_cbc_err:
crypto_unregister_alg(&blk_ecb_alg);
@@ -818,13 +1340,17 @@ static void __exit aesni_exit(void)
#ifdef HAS_LRW
crypto_unregister_alg(&ablk_lrw_alg);
#endif
+#ifdef CONFIG_X86_64
#ifdef HAS_CTR
crypto_unregister_alg(&ablk_rfc3686_ctr_alg);
#endif
+ crypto_unregister_alg(&rfc4106_alg);
+ crypto_unregister_alg(&__rfc4106_alg);
crypto_unregister_alg(&ablk_ctr_alg);
+ crypto_unregister_alg(&blk_ctr_alg);
+#endif
crypto_unregister_alg(&ablk_cbc_alg);
crypto_unregister_alg(&ablk_ecb_alg);
- crypto_unregister_alg(&blk_ctr_alg);
crypto_unregister_alg(&blk_cbc_alg);
crypto_unregister_alg(&blk_ecb_alg);
crypto_unregister_alg(&__aesni_alg);
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