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crypto: aesni - Introduce gcm_context_data

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Introduce a gcm_context_data struct that will be used to pass
context data between scatter/gather update calls.  It is passed
as the second argument (after crypto keys), other args are
renumbered.

Signed-off-by: Dave Watson <davejwatson@fb.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Dave Watson
2018-02-14 09:39:23 -08:00
committed by Herbert Xu
parent ba45833e3e
commit 9ee4a5df22
2 changed files with 121 additions and 75 deletions
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81
arch/x86/crypto/aesni-intel_glue.c
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@@ -72,6 +72,21 @@ struct aesni_xts_ctx {
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 * 8];
};
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,
@@ -105,6 +120,7 @@ asmlinkage void aesni_xts_crypt8(struct crypto_aes_ctx *ctx, u8 *out,
/* asmlinkage void aesni_gcm_enc()
* void *ctx, AES Key schedule. Starts on a 16 byte boundary.
* struct gcm_context_data. May be uninitialized.
* 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.
@@ -117,13 +133,15 @@ asmlinkage void aesni_xts_crypt8(struct crypto_aes_ctx *ctx, u8 *out,
* 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,
asmlinkage void aesni_gcm_enc(void *ctx,
struct gcm_context_data *gdata, 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.
* struct gcm_context_data. May be uninitialized.
* 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.
@@ -137,7 +155,8 @@ asmlinkage void aesni_gcm_enc(void *ctx, u8 *out,
* 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,
asmlinkage void aesni_gcm_dec(void *ctx,
struct gcm_context_data *gdata, 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);
@@ -167,15 +186,17 @@ asmlinkage void aesni_gcm_dec_avx_gen2(void *ctx, u8 *out,
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,
static void aesni_gcm_enc_avx(void *ctx,
struct gcm_context_data *data, 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);
aesni_gcm_enc(ctx, data, 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,
@@ -183,15 +204,17 @@ static void aesni_gcm_enc_avx(void *ctx, u8 *out,
}
}
static void aesni_gcm_dec_avx(void *ctx, u8 *out,
static void aesni_gcm_dec_avx(void *ctx,
struct gcm_context_data *data, 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);
aesni_gcm_dec(ctx, data, 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,
@@ -218,15 +241,17 @@ asmlinkage void aesni_gcm_dec_avx_gen4(void *ctx, u8 *out,
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,
static void aesni_gcm_enc_avx2(void *ctx,
struct gcm_context_data *data, 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);
aesni_gcm_enc(ctx, data, 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,
@@ -238,15 +263,17 @@ static void aesni_gcm_enc_avx2(void *ctx, u8 *out,
}
}
static void aesni_gcm_dec_avx2(void *ctx, u8 *out,
static void aesni_gcm_dec_avx2(void *ctx,
struct gcm_context_data *data, 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);
aesni_gcm_dec(ctx, data, 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,
@@ -259,15 +286,19 @@ static void aesni_gcm_dec_avx2(void *ctx, u8 *out,
}
#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_enc_tfm)(void *ctx,
struct gcm_context_data *data, 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 void (*aesni_gcm_dec_tfm)(void *ctx,
struct gcm_context_data *data, 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)
@@ -753,6 +784,7 @@ static int gcmaes_encrypt(struct aead_request *req, unsigned int assoclen,
unsigned long auth_tag_len = crypto_aead_authsize(tfm);
struct scatter_walk src_sg_walk;
struct scatter_walk dst_sg_walk = {};
struct gcm_context_data data AESNI_ALIGN_ATTR;
if (sg_is_last(req->src) &&
(!PageHighMem(sg_page(req->src)) ||
@@ -782,7 +814,7 @@ static int gcmaes_encrypt(struct aead_request *req, unsigned int assoclen,
}
kernel_fpu_begin();
aesni_gcm_enc_tfm(aes_ctx, dst, src, req->cryptlen, iv,
aesni_gcm_enc_tfm(aes_ctx, &data, dst, src, req->cryptlen, iv,
hash_subkey, assoc, assoclen,
dst + req->cryptlen, auth_tag_len);
kernel_fpu_end();
@@ -817,6 +849,7 @@ static int gcmaes_decrypt(struct aead_request *req, unsigned int assoclen,
u8 authTag[16];
struct scatter_walk src_sg_walk;
struct scatter_walk dst_sg_walk = {};
struct gcm_context_data data AESNI_ALIGN_ATTR;
int retval = 0;
tempCipherLen = (unsigned long)(req->cryptlen - auth_tag_len);
@@ -849,7 +882,7 @@ static int gcmaes_decrypt(struct aead_request *req, unsigned int assoclen,
kernel_fpu_begin();
aesni_gcm_dec_tfm(aes_ctx, dst, src, tempCipherLen, iv,
aesni_gcm_dec_tfm(aes_ctx, &data, dst, src, tempCipherLen, iv,
hash_subkey, assoc, assoclen,
authTag, auth_tag_len);
kernel_fpu_end();