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[CRYPTO] digest: Remove old HMAC implementation

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This patch removes the old HMAC implementation now that nobody uses it
anymore.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Herbert Xu 2006-08-20 15:25:22 +10:00
parent 878b901466
commit 8425165dfe
5 changed files with 2 additions and 133 deletions
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2
crypto/Kconfig
View File

@ -33,7 +33,7 @@ config CRYPTO_MANAGER
cbc(aes).
config CRYPTO_HMAC
bool "HMAC support"
tristate "HMAC support"
select CRYPTO_HASH
help
HMAC: Keyed-Hashing for Message Authentication (RFC2104).

3
crypto/digest.c
View File

@ -191,10 +191,9 @@ int crypto_init_digest_ops(struct crypto_tfm *tfm)
ops->setkey = dalg->dia_setkey ? setkey : nosetkey;
ops->digestsize = dalg->dia_digestsize;
return crypto_alloc_hmac_block(tfm);
return 0;
}
void crypto_exit_digest_ops(struct crypto_tfm *tfm)
{
crypto_free_hmac_block(tfm);
}

101
crypto/hmac.c
View File

@ -29,107 +29,6 @@ struct hmac_ctx {
struct crypto_hash *child;
};
static void hash_key(struct crypto_tfm *tfm, u8 *key, unsigned int keylen)
{
struct scatterlist tmp;
sg_set_buf(&tmp, key, keylen);
crypto_digest_digest(tfm, &tmp, 1, key);
}
int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
{
int ret = 0;
BUG_ON(!crypto_tfm_alg_blocksize(tfm));
tfm->crt_hash.hmac_block = kmalloc(crypto_tfm_alg_blocksize(tfm),
GFP_KERNEL);
if (tfm->crt_hash.hmac_block == NULL)
ret = -ENOMEM;
return ret;
}
void crypto_free_hmac_block(struct crypto_tfm *tfm)
{
kfree(tfm->crt_hash.hmac_block);
}
void crypto_hmac_init(struct crypto_tfm *tfm, u8 *key, unsigned int *keylen)
{
unsigned int i;
struct scatterlist tmp;
char *ipad = tfm->crt_hash.hmac_block;
if (*keylen > crypto_tfm_alg_blocksize(tfm)) {
hash_key(tfm, key, *keylen);
*keylen = crypto_tfm_alg_digestsize(tfm);
}
memset(ipad, 0, crypto_tfm_alg_blocksize(tfm));
memcpy(ipad, key, *keylen);
for (i = 0; i < crypto_tfm_alg_blocksize(tfm); i++)
ipad[i] ^= 0x36;
sg_set_buf(&tmp, ipad, crypto_tfm_alg_blocksize(tfm));
crypto_digest_init(tfm);
crypto_digest_update(tfm, &tmp, 1);
}
void crypto_hmac_update(struct crypto_tfm *tfm,
struct scatterlist *sg, unsigned int nsg)
{
crypto_digest_update(tfm, sg, nsg);
}
void crypto_hmac_final(struct crypto_tfm *tfm, u8 *key,
unsigned int *keylen, u8 *out)
{
unsigned int i;
struct scatterlist tmp;
char *opad = tfm->crt_hash.hmac_block;
if (*keylen > crypto_tfm_alg_blocksize(tfm)) {
hash_key(tfm, key, *keylen);
*keylen = crypto_tfm_alg_digestsize(tfm);
}
crypto_digest_final(tfm, out);
memset(opad, 0, crypto_tfm_alg_blocksize(tfm));
memcpy(opad, key, *keylen);
for (i = 0; i < crypto_tfm_alg_blocksize(tfm); i++)
opad[i] ^= 0x5c;
sg_set_buf(&tmp, opad, crypto_tfm_alg_blocksize(tfm));
crypto_digest_init(tfm);
crypto_digest_update(tfm, &tmp, 1);
sg_set_buf(&tmp, out, crypto_tfm_alg_digestsize(tfm));
crypto_digest_update(tfm, &tmp, 1);
crypto_digest_final(tfm, out);
}
void crypto_hmac(struct crypto_tfm *tfm, u8 *key, unsigned int *keylen,
struct scatterlist *sg, unsigned int nsg, u8 *out)
{
crypto_hmac_init(tfm, key, keylen);
crypto_hmac_update(tfm, sg, nsg);
crypto_hmac_final(tfm, key, keylen, out);
}
EXPORT_SYMBOL_GPL(crypto_hmac_init);
EXPORT_SYMBOL_GPL(crypto_hmac_update);
EXPORT_SYMBOL_GPL(crypto_hmac_final);
EXPORT_SYMBOL_GPL(crypto_hmac);
static inline void *align_ptr(void *p, unsigned int align)
{
return (void *)ALIGN((unsigned long)p, align);

13
crypto/internal.h
View File

@ -73,19 +73,6 @@ static inline void crypto_yield(u32 flags)
cond_resched();
}
#ifdef CONFIG_CRYPTO_HMAC
int crypto_alloc_hmac_block(struct crypto_tfm *tfm);
void crypto_free_hmac_block(struct crypto_tfm *tfm);
#else
static inline int crypto_alloc_hmac_block(struct crypto_tfm *tfm)
{
return 0;
}
static inline void crypto_free_hmac_block(struct crypto_tfm *tfm)
{ }
#endif
#ifdef CONFIG_PROC_FS
void __init crypto_init_proc(void);
void __exit crypto_exit_proc(void);

16
include/linux/crypto.h
View File

@ -295,9 +295,6 @@ struct hash_tfm {
unsigned int nsg, u8 *out);
int (*setkey)(struct crypto_hash *tfm, const u8 *key,
unsigned int keylen);
#ifdef CONFIG_CRYPTO_HMAC
void *hmac_block;
#endif
unsigned int digestsize;
};
@ -872,18 +869,5 @@ static inline int crypto_comp_decompress(struct crypto_tfm *tfm,
return tfm->crt_compress.cot_decompress(tfm, src, slen, dst, dlen);
}
/*
* HMAC support.
*/
#ifdef CONFIG_CRYPTO_HMAC
void crypto_hmac_init(struct crypto_tfm *tfm, u8 *key, unsigned int *keylen);
void crypto_hmac_update(struct crypto_tfm *tfm,
struct scatterlist *sg, unsigned int nsg);
void crypto_hmac_final(struct crypto_tfm *tfm, u8 *key,
unsigned int *keylen, u8 *out);
void crypto_hmac(struct crypto_tfm *tfm, u8 *key, unsigned int *keylen,
struct scatterlist *sg, unsigned int nsg, u8 *out);
#endif /* CONFIG_CRYPTO_HMAC */
#endif /* _LINUX_CRYPTO_H */