sparc64: Add MD5 driver making use of the 'md5' instruction.
Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
David S. Miller
parent
775e0c6998
commit
fa4dfedcc2
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@ -5,7 +5,9 @@
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obj-$(CONFIG_CRYPTO_SHA1_SPARC64) += sha1-sparc64.o
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obj-$(CONFIG_CRYPTO_SHA256_SPARC64) += sha256-sparc64.o
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obj-$(CONFIG_CRYPTO_SHA512_SPARC64) += sha512-sparc64.o
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obj-$(CONFIG_CRYPTO_MD5_SPARC64) += md5-sparc64.o
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sha1-sparc64-y := sha1_asm.o sha1_glue.o
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sha256-sparc64-y := sha256_asm.o sha256_glue.o
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sha512-sparc64-y := sha512_asm.o sha512_glue.o
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md5-sparc64-y := md5_asm.o md5_glue.o
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@ -0,0 +1,70 @@
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#include <linux/linkage.h>
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#include <asm/visasm.h>
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ENTRY(md5_sparc64_transform)
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/* %o0 = digest, %o1 = data, %o2 = rounds */
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VISEntryHalf
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ld [%o0 + 0x00], %f0
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ld [%o0 + 0x04], %f1
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andcc %o1, 0x7, %g0
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ld [%o0 + 0x08], %f2
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bne,pn %xcc, 10f
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ld [%o0 + 0x0c], %f3
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1:
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ldd [%o1 + 0x00], %f8
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ldd [%o1 + 0x08], %f10
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ldd [%o1 + 0x10], %f12
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ldd [%o1 + 0x18], %f14
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ldd [%o1 + 0x20], %f16
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ldd [%o1 + 0x28], %f18
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ldd [%o1 + 0x30], %f20
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ldd [%o1 + 0x38], %f22
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/* md5 */
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.word 0x81b02800
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subcc %o2, 1, %o2
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bne,pt %xcc, 1b
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add %o1, 0x40, %o1
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5:
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st %f0, [%o0 + 0x00]
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st %f1, [%o0 + 0x04]
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st %f2, [%o0 + 0x08]
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st %f3, [%o0 + 0x0c]
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retl
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VISExitHalf
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10:
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alignaddr %o1, %g0, %o1
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ldd [%o1 + 0x00], %f10
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1:
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ldd [%o1 + 0x08], %f12
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ldd [%o1 + 0x10], %f14
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ldd [%o1 + 0x18], %f16
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ldd [%o1 + 0x20], %f18
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ldd [%o1 + 0x28], %f20
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ldd [%o1 + 0x30], %f22
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ldd [%o1 + 0x38], %f24
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ldd [%o1 + 0x40], %f26
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faligndata %f10, %f12, %f8
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faligndata %f12, %f14, %f10
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faligndata %f14, %f16, %f12
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faligndata %f16, %f18, %f14
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faligndata %f18, %f20, %f16
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faligndata %f20, %f22, %f18
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faligndata %f22, %f24, %f20
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faligndata %f24, %f26, %f22
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/* md5 */
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.word 0x81b02800
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subcc %o2, 1, %o2
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fsrc1 %f26, %f10
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bne,pt %xcc, 1b
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add %o1, 0x40, %o1
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ba,a,pt %xcc, 5b
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ENDPROC(md5_sparc64_transform)
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@ -0,0 +1,186 @@
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/* Glue code for MD5 hashing optimized for sparc64 crypto opcodes.
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*
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* This is based largely upon arch/x86/crypto/sha1_ssse3_glue.c
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* and crypto/md5.c which are:
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*
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* Copyright (c) Alan Smithee.
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* Copyright (c) Andrew McDonald <andrew@mcdonald.org.uk>
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* Copyright (c) Jean-Francois Dive <jef@linuxbe.org>
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* Copyright (c) Mathias Krause <minipli@googlemail.com>
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* Copyright (c) Cryptoapi developers.
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* Copyright (c) 2002 James Morris <jmorris@intercode.com.au>
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <crypto/internal/hash.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/mm.h>
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#include <linux/cryptohash.h>
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#include <linux/types.h>
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#include <crypto/md5.h>
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#include <asm/pstate.h>
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#include <asm/elf.h>
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asmlinkage void md5_sparc64_transform(u32 *digest, const char *data,
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unsigned int rounds);
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static int md5_sparc64_init(struct shash_desc *desc)
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{
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struct md5_state *mctx = shash_desc_ctx(desc);
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mctx->hash[0] = cpu_to_le32(0x67452301);
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mctx->hash[1] = cpu_to_le32(0xefcdab89);
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mctx->hash[2] = cpu_to_le32(0x98badcfe);
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mctx->hash[3] = cpu_to_le32(0x10325476);
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mctx->byte_count = 0;
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return 0;
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}
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static void __md5_sparc64_update(struct md5_state *sctx, const u8 *data,
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unsigned int len, unsigned int partial)
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{
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unsigned int done = 0;
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sctx->byte_count += len;
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if (partial) {
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done = MD5_HMAC_BLOCK_SIZE - partial;
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memcpy((u8 *)sctx->block + partial, data, done);
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md5_sparc64_transform(sctx->hash, (u8 *)sctx->block, 1);
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}
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if (len - done >= MD5_HMAC_BLOCK_SIZE) {
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const unsigned int rounds = (len - done) / MD5_HMAC_BLOCK_SIZE;
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md5_sparc64_transform(sctx->hash, data + done, rounds);
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done += rounds * MD5_HMAC_BLOCK_SIZE;
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}
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memcpy(sctx->block, data + done, len - done);
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}
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static int md5_sparc64_update(struct shash_desc *desc, const u8 *data,
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unsigned int len)
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{
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struct md5_state *sctx = shash_desc_ctx(desc);
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unsigned int partial = sctx->byte_count % MD5_HMAC_BLOCK_SIZE;
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/* Handle the fast case right here */
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if (partial + len < MD5_HMAC_BLOCK_SIZE) {
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sctx->byte_count += len;
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memcpy((u8 *)sctx->block + partial, data, len);
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} else
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__md5_sparc64_update(sctx, data, len, partial);
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return 0;
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}
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/* Add padding and return the message digest. */
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static int md5_sparc64_final(struct shash_desc *desc, u8 *out)
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{
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struct md5_state *sctx = shash_desc_ctx(desc);
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unsigned int i, index, padlen;
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u32 *dst = (u32 *)out;
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__le64 bits;
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static const u8 padding[MD5_HMAC_BLOCK_SIZE] = { 0x80, };
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bits = cpu_to_le64(sctx->byte_count << 3);
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/* Pad out to 56 mod 64 and append length */
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index = sctx->byte_count % MD5_HMAC_BLOCK_SIZE;
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padlen = (index < 56) ? (56 - index) : ((MD5_HMAC_BLOCK_SIZE+56) - index);
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/* We need to fill a whole block for __md5_sparc64_update() */
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if (padlen <= 56) {
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sctx->byte_count += padlen;
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memcpy((u8 *)sctx->block + index, padding, padlen);
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} else {
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__md5_sparc64_update(sctx, padding, padlen, index);
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}
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__md5_sparc64_update(sctx, (const u8 *)&bits, sizeof(bits), 56);
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/* Store state in digest */
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for (i = 0; i < MD5_HASH_WORDS; i++)
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dst[i] = sctx->hash[i];
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/* Wipe context */
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memset(sctx, 0, sizeof(*sctx));
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return 0;
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}
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static int md5_sparc64_export(struct shash_desc *desc, void *out)
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{
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struct md5_state *sctx = shash_desc_ctx(desc);
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memcpy(out, sctx, sizeof(*sctx));
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return 0;
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}
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static int md5_sparc64_import(struct shash_desc *desc, const void *in)
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{
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struct md5_state *sctx = shash_desc_ctx(desc);
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memcpy(sctx, in, sizeof(*sctx));
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return 0;
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}
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static struct shash_alg alg = {
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.digestsize = MD5_DIGEST_SIZE,
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.init = md5_sparc64_init,
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.update = md5_sparc64_update,
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.final = md5_sparc64_final,
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.export = md5_sparc64_export,
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.import = md5_sparc64_import,
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.descsize = sizeof(struct md5_state),
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.statesize = sizeof(struct md5_state),
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.base = {
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.cra_name = "md5",
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.cra_driver_name= "md5-sparc64",
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.cra_priority = 150,
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.cra_flags = CRYPTO_ALG_TYPE_SHASH,
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.cra_blocksize = MD5_HMAC_BLOCK_SIZE,
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.cra_module = THIS_MODULE,
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}
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};
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static bool __init sparc64_has_md5_opcode(void)
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{
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unsigned long cfr;
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if (!(sparc64_elf_hwcap & HWCAP_SPARC_CRYPTO))
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return false;
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__asm__ __volatile__("rd %%asr26, %0" : "=r" (cfr));
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if (!(cfr & CFR_MD5))
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return false;
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return true;
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}
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static int __init md5_sparc64_mod_init(void)
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{
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if (sparc64_has_md5_opcode()) {
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pr_info("Using sparc64 md5 opcode optimized MD5 implementation\n");
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return crypto_register_shash(&alg);
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}
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pr_info("sparc64 md5 opcode not available.\n");
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return -ENODEV;
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}
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static void __exit md5_sparc64_mod_fini(void)
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{
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crypto_unregister_shash(&alg);
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}
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module_init(md5_sparc64_mod_init);
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module_exit(md5_sparc64_mod_fini);
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("MD5 Secure Hash Algorithm, sparc64 md5 opcode accelerated");
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MODULE_ALIAS("md5");
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@ -354,6 +354,15 @@ config CRYPTO_MD5
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help
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MD5 message digest algorithm (RFC1321).
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config CRYPTO_MD5_SPARC64
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tristate "MD5 digest algorithm (SPARC64)"
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depends on SPARC64
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select CRYPTO_MD5
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select CRYPTO_HASH
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help
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MD5 message digest algorithm (RFC1321) implemented
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using sparc64 crypto instructions, when available.
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config CRYPTO_MICHAEL_MIC
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tristate "Michael MIC keyed digest algorithm"
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select CRYPTO_HASH
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