[CRYPTO] digest: Remove old HMAC implementation

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>

4 files changed, 2 insertions, 117 deletions

diff --git a/crypto/Kconfig b/crypto/Kconfig
index f07d9237950f..1e2f39c21180 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -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).
diff --git a/crypto/digest.c b/crypto/digest.c
index 5873063db840..0155a94e4b15 100644
--- a/crypto/digest.c
+++ b/crypto/digest.c
@@ -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);
 }
diff --git a/crypto/hmac.c b/crypto/hmac.c
index eac77e294740..f403b6946047 100644
--- a/crypto/hmac.c
+++ b/crypto/hmac.c
@@ -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);
diff --git a/crypto/internal.h b/crypto/internal.h
index 93d9b10ff914..2da6ad4f3593 100644
--- a/crypto/internal.h
+++ b/crypto/internal.h
@@ -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);