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crypto: tgr192 - Switch to shash
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This patch changes tgr192, tgr160 and tgr128 to the new shash interface.

Signed-off-by: Adrian-Ken Rueegsegger <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
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@Kensan @herbertx
Kensan authored and herbertx committed Dec 25, 2008
1 parent 50e109b commit f63fbd3
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Showing 2 changed files with 72 additions and 65 deletions.
2 changes: 1 addition & 1 deletion crypto/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -381,7 +381,7 @@ config CRYPTO_SHA512

config CRYPTO_TGR192
tristate "Tiger digest algorithms"
select CRYPTO_ALGAPI
select CRYPTO_HASH
help
Tiger hash algorithm 192, 160 and 128-bit hashes

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135 changes: 71 additions & 64 deletions crypto/tgr192.c
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Original file line number Diff line number Diff line change
Expand Up @@ -21,11 +21,11 @@
* (at your option) any later version.
*
*/
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <asm/byteorder.h>
#include <linux/crypto.h>
#include <linux/types.h>

#define TGR192_DIGEST_SIZE 24
Expand Down Expand Up @@ -495,40 +495,42 @@ static void tgr192_transform(struct tgr192_ctx *tctx, const u8 * data)
tctx->c = c;
}

static void tgr192_init(struct crypto_tfm *tfm)
static int tgr192_init(struct shash_desc *desc)
{
struct tgr192_ctx *tctx = crypto_tfm_ctx(tfm);
struct tgr192_ctx *tctx = shash_desc_ctx(desc);

tctx->a = 0x0123456789abcdefULL;
tctx->b = 0xfedcba9876543210ULL;
tctx->c = 0xf096a5b4c3b2e187ULL;
tctx->nblocks = 0;
tctx->count = 0;

return 0;
}


/* Update the message digest with the contents
* of INBUF with length INLEN. */
static void tgr192_update(struct crypto_tfm *tfm, const u8 *inbuf,
static int tgr192_update(struct shash_desc *desc, const u8 *inbuf,
unsigned int len)
{
struct tgr192_ctx *tctx = crypto_tfm_ctx(tfm);
struct tgr192_ctx *tctx = shash_desc_ctx(desc);

if (tctx->count == 64) { /* flush the buffer */
tgr192_transform(tctx, tctx->hash);
tctx->count = 0;
tctx->nblocks++;
}
if (!inbuf) {
return;
return 0;
}
if (tctx->count) {
for (; len && tctx->count < 64; len--) {
tctx->hash[tctx->count++] = *inbuf++;
}
tgr192_update(tfm, NULL, 0);
tgr192_update(desc, NULL, 0);
if (!len) {
return;
return 0;
}

}
Expand All @@ -543,20 +545,22 @@ static void tgr192_update(struct crypto_tfm *tfm, const u8 *inbuf,
for (; len && tctx->count < 64; len--) {
tctx->hash[tctx->count++] = *inbuf++;
}

return 0;
}



/* The routine terminates the computation */
static void tgr192_final(struct crypto_tfm *tfm, u8 * out)
static int tgr192_final(struct shash_desc *desc, u8 * out)
{
struct tgr192_ctx *tctx = crypto_tfm_ctx(tfm);
struct tgr192_ctx *tctx = shash_desc_ctx(desc);
__be64 *dst = (__be64 *)out;
__be64 *be64p;
__le32 *le32p;
u32 t, msb, lsb;

tgr192_update(tfm, NULL, 0); /* flush */ ;
tgr192_update(desc, NULL, 0); /* flush */ ;

msb = 0;
t = tctx->nblocks;
Expand Down Expand Up @@ -584,7 +588,7 @@ static void tgr192_final(struct crypto_tfm *tfm, u8 * out)
while (tctx->count < 64) {
tctx->hash[tctx->count++] = 0;
}
tgr192_update(tfm, NULL, 0); /* flush */ ;
tgr192_update(desc, NULL, 0); /* flush */ ;
memset(tctx->hash, 0, 56); /* fill next block with zeroes */
}
/* append the 64 bit count */
Expand All @@ -598,101 +602,104 @@ static void tgr192_final(struct crypto_tfm *tfm, u8 * out)
dst[0] = be64p[0] = cpu_to_be64(tctx->a);
dst[1] = be64p[1] = cpu_to_be64(tctx->b);
dst[2] = be64p[2] = cpu_to_be64(tctx->c);

return 0;
}

static void tgr160_final(struct crypto_tfm *tfm, u8 * out)
static int tgr160_final(struct shash_desc *desc, u8 * out)
{
u8 D[64];

tgr192_final(tfm, D);
tgr192_final(desc, D);
memcpy(out, D, TGR160_DIGEST_SIZE);
memset(D, 0, TGR192_DIGEST_SIZE);

return 0;
}

static void tgr128_final(struct crypto_tfm *tfm, u8 * out)
static int tgr128_final(struct shash_desc *desc, u8 * out)
{
u8 D[64];

tgr192_final(tfm, D);
tgr192_final(desc, D);
memcpy(out, D, TGR128_DIGEST_SIZE);
memset(D, 0, TGR192_DIGEST_SIZE);

return 0;
}

static struct crypto_alg tgr192 = {
.cra_name = "tgr192",
.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
.cra_blocksize = TGR192_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct tgr192_ctx),
.cra_module = THIS_MODULE,
.cra_alignmask = 7,
.cra_list = LIST_HEAD_INIT(tgr192.cra_list),
.cra_u = {.digest = {
.dia_digestsize = TGR192_DIGEST_SIZE,
.dia_init = tgr192_init,
.dia_update = tgr192_update,
.dia_final = tgr192_final}}
static struct shash_alg tgr192 = {
.digestsize = TGR192_DIGEST_SIZE,
.init = tgr192_init,
.update = tgr192_update,
.final = tgr192_final,
.descsize = sizeof(struct tgr192_ctx),
.base = {
.cra_name = "tgr192",
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = TGR192_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};

static struct crypto_alg tgr160 = {
.cra_name = "tgr160",
.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
.cra_blocksize = TGR192_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct tgr192_ctx),
.cra_module = THIS_MODULE,
.cra_alignmask = 7,
.cra_list = LIST_HEAD_INIT(tgr160.cra_list),
.cra_u = {.digest = {
.dia_digestsize = TGR160_DIGEST_SIZE,
.dia_init = tgr192_init,
.dia_update = tgr192_update,
.dia_final = tgr160_final}}
static struct shash_alg tgr160 = {
.digestsize = TGR160_DIGEST_SIZE,
.init = tgr192_init,
.update = tgr192_update,
.final = tgr160_final,
.descsize = sizeof(struct tgr192_ctx),
.base = {
.cra_name = "tgr160",
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = TGR192_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};

static struct crypto_alg tgr128 = {
.cra_name = "tgr128",
.cra_flags = CRYPTO_ALG_TYPE_DIGEST,
.cra_blocksize = TGR192_BLOCK_SIZE,
.cra_ctxsize = sizeof(struct tgr192_ctx),
.cra_module = THIS_MODULE,
.cra_alignmask = 7,
.cra_list = LIST_HEAD_INIT(tgr128.cra_list),
.cra_u = {.digest = {
.dia_digestsize = TGR128_DIGEST_SIZE,
.dia_init = tgr192_init,
.dia_update = tgr192_update,
.dia_final = tgr128_final}}
static struct shash_alg tgr128 = {
.digestsize = TGR128_DIGEST_SIZE,
.init = tgr192_init,
.update = tgr192_update,
.final = tgr128_final,
.descsize = sizeof(struct tgr192_ctx),
.base = {
.cra_name = "tgr128",
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = TGR192_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};

static int __init tgr192_mod_init(void)
{
int ret = 0;

ret = crypto_register_alg(&tgr192);
ret = crypto_register_shash(&tgr192);

if (ret < 0) {
goto out;
}

ret = crypto_register_alg(&tgr160);
ret = crypto_register_shash(&tgr160);
if (ret < 0) {
crypto_unregister_alg(&tgr192);
crypto_unregister_shash(&tgr192);
goto out;
}

ret = crypto_register_alg(&tgr128);
ret = crypto_register_shash(&tgr128);
if (ret < 0) {
crypto_unregister_alg(&tgr192);
crypto_unregister_alg(&tgr160);
crypto_unregister_shash(&tgr192);
crypto_unregister_shash(&tgr160);
}
out:
return ret;
}

static void __exit tgr192_mod_fini(void)
{
crypto_unregister_alg(&tgr192);
crypto_unregister_alg(&tgr160);
crypto_unregister_alg(&tgr128);
crypto_unregister_shash(&tgr192);
crypto_unregister_shash(&tgr160);
crypto_unregister_shash(&tgr128);
}

MODULE_ALIAS("tgr160");
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