crypto: cfb,ofb - Remove cfb and ofb

    
Remove the unused algorithms CFB/OFB.

Signed-off-by: Herbert Xu <[email protected]>

crypto/Kconfig

@@ -661,15 +661,6 @@ config CRYPTO_CBC
 
 	  This block cipher mode is required for IPSec ESP (XFRM_ESP).
 
-config CRYPTO_CFB
-	tristate "CFB (Cipher Feedback)"
-	select CRYPTO_SKCIPHER
-	select CRYPTO_MANAGER
-	help
-	  CFB (Cipher Feedback) mode (NIST SP800-38A)
-
-	  This block cipher mode is required for TPM2 Cryptography.
-
 config CRYPTO_CTR
 	tristate "CTR (Counter)"
 	select CRYPTO_SKCIPHER
@@ -735,20 +726,6 @@ config CRYPTO_LRW
 
 	  See https://people.csail.mit.edu/rivest/pubs/LRW02.pdf
 
-config CRYPTO_OFB
-	tristate "OFB (Output Feedback)"
-	select CRYPTO_SKCIPHER
-	select CRYPTO_MANAGER
-	help
-	  OFB (Output Feedback) mode (NIST SP800-38A)
-
-	  This mode makes a block cipher into a synchronous
-	  stream cipher. It generates keystream blocks, which are then XORed
-	  with the plaintext blocks to get the ciphertext. Flipping a bit in the
-	  ciphertext produces a flipped bit in the plaintext at the same
-	  location. This property allows many error correcting codes to function
-	  normally even when applied before encryption.
-
 config CRYPTO_PCBC
 	tristate "PCBC (Propagating Cipher Block Chaining)"
 	select CRYPTO_SKCIPHER

crypto/Makefile

@@ -92,7 +92,6 @@ obj-$(CONFIG_CRYPTO_BLAKE2B) += blake2b_generic.o
 CFLAGS_blake2b_generic.o := -Wframe-larger-than=4096 #  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105930
 obj-$(CONFIG_CRYPTO_ECB) += ecb.o
 obj-$(CONFIG_CRYPTO_CBC) += cbc.o
-obj-$(CONFIG_CRYPTO_CFB) += cfb.o
 obj-$(CONFIG_CRYPTO_PCBC) += pcbc.o
 obj-$(CONFIG_CRYPTO_CTS) += cts.o
 obj-$(CONFIG_CRYPTO_LRW) += lrw.o
@@ -186,7 +185,6 @@ obj-$(CONFIG_CRYPTO_USER_API_SKCIPHER) += algif_skcipher.o
 obj-$(CONFIG_CRYPTO_USER_API_RNG) += algif_rng.o
 obj-$(CONFIG_CRYPTO_USER_API_AEAD) += algif_aead.o
 obj-$(CONFIG_CRYPTO_ZSTD) += zstd.o
-obj-$(CONFIG_CRYPTO_OFB) += ofb.o
 obj-$(CONFIG_CRYPTO_ECC) += ecc.o
 obj-$(CONFIG_CRYPTO_ESSIV) += essiv.o
 obj-$(CONFIG_CRYPTO_CURVE25519) += curve25519-generic.o