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sparc64: Add ctr mode support to AES driver. 

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2012-08-29 14:49:23 -07:00
parent 0bdcaf7495
commit 9fd130ecbe
2 changed files with 157 additions and 0 deletions
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95
arch/sparc/crypto/aes_asm.S
View File

@ -44,6 +44,8 @@
.word 0x85b02307;
#define MOVXTOD_O0_F0 \
.word 0x81b02308;
#define MOVXTOD_O5_F0 \
.word 0x81b0230d;
#define MOVXTOD_O5_F2 \
.word 0x85b0230d;
@ -1137,3 +1139,96 @@ ENTRY(aes_sparc64_cbc_decrypt_256)
retl
nop
ENDPROC(aes_sparc64_cbc_decrypt_256)
.align 32
ENTRY(aes_sparc64_ctr_crypt_128)
/* %o0=key, %o1=input, %o2=output, %o3=len, %o4=IV */
ldx [%o4 + 0x00], %g3
ldx [%o4 + 0x08], %g7
ldx [%o0 + 0x00], %g1
ldx [%o0 + 0x08], %g2
1: xor %g1, %g3, %o5
MOVXTOD_O5_F0
xor %g2, %g7, %o5
MOVXTOD_O5_F2
add %g7, 1, %g7
add %g3, 1, %o5
movrz %g7, %o5, %g3
ENCRYPT_128(8, 0, 2, 4, 6)
ldd [%o1 + 0x00], %f4
ldd [%o1 + 0x08], %f6
fxor %f4, %f0, %f4
fxor %f6, %f2, %f6
std %f4, [%o2 + 0x00]
std %f6, [%o2 + 0x08]
subcc %o3, 0x10, %o3
add %o1, 0x10, %o1
bne,pt %xcc, 1b
add %o2, 0x10, %o2
stx %g3, [%o4 + 0x00]
stx %g7, [%o4 + 0x08]
retl
nop
ENDPROC(aes_sparc64_ctr_crypt_128)
.align 32
ENTRY(aes_sparc64_ctr_crypt_192)
/* %o0=key, %o1=input, %o2=output, %o3=len, %o4=IV */
ldx [%o4 + 0x00], %g3
ldx [%o4 + 0x08], %g7
ldx [%o0 + 0x00], %g1
ldx [%o0 + 0x08], %g2
1: xor %g1, %g3, %o5
MOVXTOD_O5_F0
xor %g2, %g7, %o5
MOVXTOD_O5_F2
add %g7, 1, %g7
add %g3, 1, %o5
movrz %g7, %o5, %g3
ENCRYPT_192(8, 0, 2, 4, 6)
ldd [%o1 + 0x00], %f4
ldd [%o1 + 0x08], %f6
fxor %f4, %f0, %f4
fxor %f6, %f2, %f6
std %f4, [%o2 + 0x00]
std %f6, [%o2 + 0x08]
subcc %o3, 0x10, %o3
add %o1, 0x10, %o1
bne,pt %xcc, 1b
add %o2, 0x10, %o2
stx %g3, [%o4 + 0x00]
stx %g7, [%o4 + 0x08]
retl
nop
ENDPROC(aes_sparc64_ctr_crypt_192)
.align 32
ENTRY(aes_sparc64_ctr_crypt_256)
/* %o0=key, %o1=input, %o2=output, %o3=len, %o4=IV */
ldx [%o4 + 0x00], %g3
ldx [%o4 + 0x08], %g7
ldx [%o0 + 0x00], %g1
ldx [%o0 + 0x08], %g2
1: xor %g1, %g3, %o5
MOVXTOD_O5_F0
xor %g2, %g7, %o5
MOVXTOD_O5_F2
add %g7, 1, %g7
add %g3, 1, %o5
movrz %g7, %o5, %g3
ENCRYPT_256(8, 0, 2, 4, 6)
ldd [%o1 + 0x00], %f4
ldd [%o1 + 0x08], %f6
fxor %f4, %f0, %f4
fxor %f6, %f2, %f6
std %f4, [%o2 + 0x00]
std %f6, [%o2 + 0x08]
subcc %o3, 0x10, %o3
add %o1, 0x10, %o1
bne,pt %xcc, 1b
add %o2, 0x10, %o2
stx %g3, [%o4 + 0x00]
stx %g7, [%o4 + 0x08]
retl
nop
ENDPROC(aes_sparc64_ctr_crypt_256)

62
arch/sparc/crypto/aes_glue.c
View File

@ -39,6 +39,8 @@ struct aes_ops {
unsigned int len, u64 *iv);
void (*cbc_decrypt)(const u64 *key, const u64 *input, u64 *output,
unsigned int len, u64 *iv);
void (*ctr_crypt)(const u64 *key, const u64 *input, u64 *output,
unsigned int len, u64 *iv);
};
struct crypto_sparc64_aes_ctx {
@ -108,6 +110,16 @@ extern void aes_sparc64_cbc_decrypt_256(const u64 *key, const u64 *input,
u64 *output, unsigned int len,
u64 *iv);
extern void aes_sparc64_ctr_crypt_128(const u64 *key, const u64 *input,
u64 *output, unsigned int len,
u64 *iv);
extern void aes_sparc64_ctr_crypt_192(const u64 *key, const u64 *input,
u64 *output, unsigned int len,
u64 *iv);
extern void aes_sparc64_ctr_crypt_256(const u64 *key, const u64 *input,
u64 *output, unsigned int len,
u64 *iv);
struct aes_ops aes128_ops = {
.encrypt = aes_sparc64_encrypt_128,
.decrypt = aes_sparc64_decrypt_128,
@ -117,6 +129,7 @@ struct aes_ops aes128_ops = {
.ecb_decrypt = aes_sparc64_ecb_decrypt_128,
.cbc_encrypt = aes_sparc64_cbc_encrypt_128,
.cbc_decrypt = aes_sparc64_cbc_decrypt_128,
.ctr_crypt = aes_sparc64_ctr_crypt_128,
};
struct aes_ops aes192_ops = {
@ -128,6 +141,7 @@ struct aes_ops aes192_ops = {
.ecb_decrypt = aes_sparc64_ecb_decrypt_192,
.cbc_encrypt = aes_sparc64_cbc_encrypt_192,
.cbc_decrypt = aes_sparc64_cbc_decrypt_192,
.ctr_crypt = aes_sparc64_ctr_crypt_192,
};
struct aes_ops aes256_ops = {
@ -139,6 +153,7 @@ struct aes_ops aes256_ops = {
.ecb_decrypt = aes_sparc64_ecb_decrypt_256,
.cbc_encrypt = aes_sparc64_cbc_encrypt_256,
.cbc_decrypt = aes_sparc64_cbc_decrypt_256,
.ctr_crypt = aes_sparc64_ctr_crypt_256,
};
extern void aes_sparc64_key_expand(const u32 *in_key, u64 *output_key,
@ -310,6 +325,34 @@ static int cbc_decrypt(struct blkcipher_desc *desc,
return err;
}
static int ctr_crypt(struct blkcipher_desc *desc,
struct scatterlist *dst, struct scatterlist *src,
unsigned int nbytes)
{
struct crypto_sparc64_aes_ctx *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);
ctx->ops->load_encrypt_keys(&ctx->key[0]);
while ((nbytes = walk.nbytes)) {
unsigned int block_len = nbytes & AES_BLOCK_MASK;
if (likely(block_len)) {
ctx->ops->ctr_crypt(&ctx->key[0],
(const u64 *)walk.src.virt.addr,
(u64 *) walk.dst.virt.addr,
block_len, (u64 *) walk.iv);
}
nbytes &= AES_BLOCK_SIZE - 1;
err = blkcipher_walk_done(desc, &walk, nbytes);
}
fprs_write(0);
return err;
}
static struct crypto_alg algs[] = { {
.cra_name = "aes",
.cra_driver_name = "aes-sparc64",
@ -366,6 +409,25 @@ static struct crypto_alg algs[] = { {
.decrypt = cbc_decrypt,
},
},
}, {
.cra_name = "ctr(aes)",
.cra_driver_name = "ctr-aes-sparc64",
.cra_priority = 150,
.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER,
.cra_blocksize = AES_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct crypto_sparc64_aes_ctx),
.cra_alignmask = 7,
.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 = ctr_crypt,
.decrypt = ctr_crypt,
},
},
} };
static bool __init sparc64_has_aes_opcode(void)