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authorDavid S. Miller <davem@davemloft.net>2012-08-29 14:49:23 -0700
committerDavid S. Miller <davem@davemloft.net>2012-08-29 14:49:23 -0700
commit9fd130ecbe97f3440d14d3d0c6660413e69ac532 (patch)
tree4f9c108e6a4c305e61e4d7d7044af6822741a15e /arch/sparc/crypto
parent0bdcaf7495726688a93a2f7226e9b4beaeabd2ec (diff)
downloadlinux-9fd130ecbe97f3440d14d3d0c6660413e69ac532.tar.gz
sparc64: Add ctr mode support to AES driver.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/crypto')
-rw-r--r--arch/sparc/crypto/aes_asm.S95
-rw-r--r--arch/sparc/crypto/aes_glue.c62
2 files changed, 157 insertions, 0 deletions
diff --git a/arch/sparc/crypto/aes_asm.S b/arch/sparc/crypto/aes_asm.S
index 50faae03c592..7a975d689919 100644
--- a/arch/sparc/crypto/aes_asm.S
+++ b/arch/sparc/crypto/aes_asm.S
@@ -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)
diff --git a/arch/sparc/crypto/aes_glue.c b/arch/sparc/crypto/aes_glue.c
index 0b1de0b470a2..f457fc69edeb 100644
--- a/arch/sparc/crypto/aes_glue.c
+++ b/arch/sparc/crypto/aes_glue.c
@@ -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)