crypto: sig - Move crypto_sig_*() API calls to include file

The crypto_sig_*() API calls lived in sig.c so far because they needed
access to struct crypto_sig_type: This was necessary to differentiate
between signature algorithms that had already been migrated from
crypto_akcipher to crypto_sig and those that hadn't yet.

Now that all algorithms have been migrated, the API calls can become
static inlines in <crypto/sig.h> to mimic what <crypto/akcipher.h> is
doing.

Signed-off-by: Lukas Wunner <[e-mail]>
Reviewed-by: Stefan Berger <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

crypto/sig.c

···
 }
 EXPORT_SYMBOL_GPL(crypto_alloc_sig);
 
-int crypto_sig_maxsize(struct crypto_sig *tfm)
-{
-	struct sig_alg *alg = crypto_sig_alg(tfm);
-
-	return alg->max_size(tfm);
-}
-EXPORT_SYMBOL_GPL(crypto_sig_maxsize);
-
-int crypto_sig_sign(struct crypto_sig *tfm,
-		    const void *src, unsigned int slen,
-		    void *dst, unsigned int dlen)
-{
-	struct sig_alg *alg = crypto_sig_alg(tfm);
-
-	return alg->sign(tfm, src, slen, dst, dlen);
-}
-EXPORT_SYMBOL_GPL(crypto_sig_sign);
-
-int crypto_sig_verify(struct crypto_sig *tfm,
-		      const void *src, unsigned int slen,
-		      const void *digest, unsigned int dlen)
-{
-	struct sig_alg *alg = crypto_sig_alg(tfm);
-
-	return alg->verify(tfm, src, slen, digest, dlen);
-}
-EXPORT_SYMBOL_GPL(crypto_sig_verify);
-
-int crypto_sig_set_pubkey(struct crypto_sig *tfm,
-			  const void *key, unsigned int keylen)
-{
-	struct sig_alg *alg = crypto_sig_alg(tfm);
-
-	return alg->set_pub_key(tfm, key, keylen);
-}
-EXPORT_SYMBOL_GPL(crypto_sig_set_pubkey);
-
-int crypto_sig_set_privkey(struct crypto_sig *tfm,
-			  const void *key, unsigned int keylen)
-{
-	struct sig_alg *alg = crypto_sig_alg(tfm);
-
-	return alg->set_priv_key(tfm, key, keylen);
-}
-EXPORT_SYMBOL_GPL(crypto_sig_set_privkey);
-
 static void sig_prepare_alg(struct sig_alg *alg)
 {
 	struct crypto_alg *base = &alg->base;

include/crypto/sig.h

···
  *
  * @tfm:	signature tfm handle allocated with crypto_alloc_sig()
  */
-int crypto_sig_maxsize(struct crypto_sig *tfm);
+static inline int crypto_sig_maxsize(struct crypto_sig *tfm)
+{
+	struct sig_alg *alg = crypto_sig_alg(tfm);
+
+	return alg->max_size(tfm);
+}
 
 /**
  * crypto_sig_sign() - Invoke signing operation
···
  *
  * Return: zero on success; error code in case of error
  */
-int crypto_sig_sign(struct crypto_sig *tfm,
-		    const void *src, unsigned int slen,
-		    void *dst, unsigned int dlen);
+static inline int crypto_sig_sign(struct crypto_sig *tfm,
+				  const void *src, unsigned int slen,
+				  void *dst, unsigned int dlen)
+{
+	struct sig_alg *alg = crypto_sig_alg(tfm);
+
+	return alg->sign(tfm, src, slen, dst, dlen);
+}
 
 /**
  * crypto_sig_verify() - Invoke signature verification
···
  *
  * Return: zero on verification success; error code in case of error.
  */
-int crypto_sig_verify(struct crypto_sig *tfm,
-		      const void *src, unsigned int slen,
-		      const void *digest, unsigned int dlen);
+static inline int crypto_sig_verify(struct crypto_sig *tfm,
+				    const void *src, unsigned int slen,
+				    const void *digest, unsigned int dlen)
+{
+	struct sig_alg *alg = crypto_sig_alg(tfm);
+
+	return alg->verify(tfm, src, slen, digest, dlen);
+}
 
 /**
  * crypto_sig_set_pubkey() - Invoke set public key operation
···
  *
  * Return: zero on success; error code in case of error
  */
-int crypto_sig_set_pubkey(struct crypto_sig *tfm,
-			  const void *key, unsigned int keylen);
+static inline int crypto_sig_set_pubkey(struct crypto_sig *tfm,
+					const void *key, unsigned int keylen)
+{
+	struct sig_alg *alg = crypto_sig_alg(tfm);
+
+	return alg->set_pub_key(tfm, key, keylen);
+}
 
 /**
  * crypto_sig_set_privkey() - Invoke set private key operation
···
  *
  * Return: zero on success; error code in case of error
  */
-int crypto_sig_set_privkey(struct crypto_sig *tfm,
-			   const void *key, unsigned int keylen);
+static inline int crypto_sig_set_privkey(struct crypto_sig *tfm,
+					 const void *key, unsigned int keylen)
+{
+	struct sig_alg *alg = crypto_sig_alg(tfm);
+
+	return alg->set_priv_key(tfm, key, keylen);
+}
 #endif