crypto: asymmetric_keys - Remove unused functions

encrypt_blob(), decrypt_blob() and create_signature() were some of the
functions added in 2018 by
commit 5a30771832aa ("KEYS: Provide missing asymmetric key subops for new
key type ops [ver #2]")
however, they've not been used.

Remove them.

Signed-off-by: Dr. David Alan Gilbert <[e-mail]>
Reviewed-by: Jarkko Sakkinen <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

crypto/asymmetric_keys/signature.c

···
 EXPORT_SYMBOL_GPL(query_asymmetric_key);
 
 /**
- * encrypt_blob - Encrypt data using an asymmetric key
- * @params: Various parameters
- * @data: Data blob to be encrypted, length params->data_len
- * @enc: Encrypted data buffer, length params->enc_len
- *
- * Encrypt the specified data blob using the private key specified by
- * params->key.  The encrypted data is wrapped in an encoding if
- * params->encoding is specified (eg. "pkcs1").
- *
- * Returns the length of the data placed in the encrypted data buffer or an
- * error.
- */
-int encrypt_blob(struct kernel_pkey_params *params,
-		 const void *data, void *enc)
-{
-	params->op = kernel_pkey_encrypt;
-	return asymmetric_key_eds_op(params, data, enc);
-}
-EXPORT_SYMBOL_GPL(encrypt_blob);
-
-/**
- * decrypt_blob - Decrypt data using an asymmetric key
- * @params: Various parameters
- * @enc: Encrypted data to be decrypted, length params->enc_len
- * @data: Decrypted data buffer, length params->data_len
- *
- * Decrypt the specified data blob using the private key specified by
- * params->key.  The decrypted data is wrapped in an encoding if
- * params->encoding is specified (eg. "pkcs1").
- *
- * Returns the length of the data placed in the decrypted data buffer or an
- * error.
- */
-int decrypt_blob(struct kernel_pkey_params *params,
-		 const void *enc, void *data)
-{
-	params->op = kernel_pkey_decrypt;
-	return asymmetric_key_eds_op(params, enc, data);
-}
-EXPORT_SYMBOL_GPL(decrypt_blob);
-
-/**
- * create_signature - Sign some data using an asymmetric key
- * @params: Various parameters
- * @data: Data blob to be signed, length params->data_len
- * @enc: Signature buffer, length params->enc_len
- *
- * Sign the specified data blob using the private key specified by params->key.
- * The signature is wrapped in an encoding if params->encoding is specified
- * (eg. "pkcs1").  If the encoding needs to know the digest type, this can be
- * passed through params->hash_algo (eg. "sha1").
- *
- * Returns the length of the data placed in the signature buffer or an error.
- */
-int create_signature(struct kernel_pkey_params *params,
-		     const void *data, void *enc)
-{
-	params->op = kernel_pkey_sign;
-	return asymmetric_key_eds_op(params, data, enc);
-}
-EXPORT_SYMBOL_GPL(create_signature);
-
-/**
  * verify_signature - Initiate the use of an asymmetric key to verify a signature
  * @key: The asymmetric key to verify against
  * @sig: The signature to check

include/crypto/public_key.h

···
 extern int query_asymmetric_key(const struct kernel_pkey_params *,
 				struct kernel_pkey_query *);
 
-extern int encrypt_blob(struct kernel_pkey_params *, const void *, void *);
-extern int decrypt_blob(struct kernel_pkey_params *, const void *, void *);
-extern int create_signature(struct kernel_pkey_params *, const void *, void *);
 extern int verify_signature(const struct key *,
 			    const struct public_key_signature *);