crypto: keywrap - remove unused keywrap algorithm

The keywrap (kw) algorithm has no in-tree user.  It has never had an
in-tree user, and the patch that added it provided no justification for
its inclusion.  Even use of it via AF_ALG is impossible, as it uses a
weird calling convention where part of the ciphertext is returned via
the IV buffer, which is not returned to userspace in AF_ALG.

It's also unclear whether any new code in the kernel that does key
wrapping would actually use this algorithm.  It is controversial in the
cryptographic community due to having no clearly stated security goal,
no security proof, poor performance, and only a 64-bit auth tag.  Later
work (https://eprint.iacr.org/2006/221) suggested that the goal is
deterministic authenticated encryption.  But there are now more modern
algorithms for this, and this is not the same as key wrapping, for which
a regular AEAD such as AES-GCM usually can be (and is) used instead.

Therefore, remove this unused code.

There were several special cases for this algorithm in the self-tests,
due to its weird calling convention.  Remove those too.

Cc: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Eric Biggers <ebiggers@google.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> # m68k
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

12 files changed, 0 insertions, 12 deletions

diff --git a/arch/m68k/configs/amiga_defconfig b/arch/m68k/configs/amiga_defconfig
index 5f9117b46867..110d26620a08 100644
--- a/arch/m68k/configs/amiga_defconfig
+++ b/arch/m68k/configs/amiga_defconfig
@@ -579,7 +579,6 @@ CONFIG_CRYPTO_ADIANTUM=m
 CONFIG_CRYPTO_ARC4=m
 CONFIG_CRYPTO_CTS=m
 CONFIG_CRYPTO_HCTR2=m
-CONFIG_CRYPTO_KEYWRAP=m
 CONFIG_CRYPTO_LRW=m
 CONFIG_CRYPTO_PCBC=m
 CONFIG_CRYPTO_XTS=m
diff --git a/arch/m68k/configs/apollo_defconfig b/arch/m68k/configs/apollo_defconfig
index eb8a0432f1fa..60cbba7a78e3 100644
--- a/arch/m68k/configs/apollo_defconfig
+++ b/arch/m68k/configs/apollo_defconfig
@@ -536,7 +536,6 @@ CONFIG_CRYPTO_ADIANTUM=m
 CONFIG_CRYPTO_ARC4=m
 CONFIG_CRYPTO_CTS=m
 CONFIG_CRYPTO_HCTR2=m
-CONFIG_CRYPTO_KEYWRAP=m
 CONFIG_CRYPTO_LRW=m
 CONFIG_CRYPTO_PCBC=m
 CONFIG_CRYPTO_XTS=m
diff --git a/arch/m68k/configs/atari_defconfig b/arch/m68k/configs/atari_defconfig
index 8ac95c1207b1..f950cfd719b4 100644
--- a/arch/m68k/configs/atari_defconfig
+++ b/arch/m68k/configs/atari_defconfig
@@ -556,7 +556,6 @@ CONFIG_CRYPTO_ADIANTUM=m
 CONFIG_CRYPTO_ARC4=m
 CONFIG_CRYPTO_CTS=m
 CONFIG_CRYPTO_HCTR2=m
-CONFIG_CRYPTO_KEYWRAP=m
 CONFIG_CRYPTO_LRW=m
 CONFIG_CRYPTO_PCBC=m
 CONFIG_CRYPTO_XTS=m
diff --git a/arch/m68k/configs/bvme6000_defconfig b/arch/m68k/configs/bvme6000_defconfig
index cf9ea62bdcbe..52f6f0fb3de7 100644
--- a/arch/m68k/configs/bvme6000_defconfig
+++ b/arch/m68k/configs/bvme6000_defconfig
@@ -528,7 +528,6 @@ CONFIG_CRYPTO_ADIANTUM=m
 CONFIG_CRYPTO_ARC4=m
 CONFIG_CRYPTO_CTS=m
 CONFIG_CRYPTO_HCTR2=m
-CONFIG_CRYPTO_KEYWRAP=m
 CONFIG_CRYPTO_LRW=m
 CONFIG_CRYPTO_PCBC=m
 CONFIG_CRYPTO_XTS=m
diff --git a/arch/m68k/configs/hp300_defconfig b/arch/m68k/configs/hp300_defconfig
index aacb040b741e..9beef3d98df3 100644
--- a/arch/m68k/configs/hp300_defconfig
+++ b/arch/m68k/configs/hp300_defconfig
@@ -538,7 +538,6 @@ CONFIG_CRYPTO_ADIANTUM=m
 CONFIG_CRYPTO_ARC4=m
 CONFIG_CRYPTO_CTS=m
 CONFIG_CRYPTO_HCTR2=m
-CONFIG_CRYPTO_KEYWRAP=m
 CONFIG_CRYPTO_LRW=m
 CONFIG_CRYPTO_PCBC=m
 CONFIG_CRYPTO_XTS=m
diff --git a/arch/m68k/configs/mac_defconfig b/arch/m68k/configs/mac_defconfig
index 2b0383580564..b1b8f523d2af 100644
--- a/arch/m68k/configs/mac_defconfig
+++ b/arch/m68k/configs/mac_defconfig
@@ -555,7 +555,6 @@ CONFIG_CRYPTO_ADIANTUM=m
 CONFIG_CRYPTO_ARC4=m
 CONFIG_CRYPTO_CTS=m
 CONFIG_CRYPTO_HCTR2=m
-CONFIG_CRYPTO_KEYWRAP=m
 CONFIG_CRYPTO_LRW=m
 CONFIG_CRYPTO_PCBC=m
 CONFIG_CRYPTO_XTS=m
diff --git a/arch/m68k/configs/multi_defconfig b/arch/m68k/configs/multi_defconfig
index 3d0b5af6bb60..777422682e4d 100644
--- a/arch/m68k/configs/multi_defconfig
+++ b/arch/m68k/configs/multi_defconfig
@@ -642,7 +642,6 @@ CONFIG_CRYPTO_ADIANTUM=m
 CONFIG_CRYPTO_ARC4=m
 CONFIG_CRYPTO_CTS=m
 CONFIG_CRYPTO_HCTR2=m
-CONFIG_CRYPTO_KEYWRAP=m
 CONFIG_CRYPTO_LRW=m
 CONFIG_CRYPTO_PCBC=m
 CONFIG_CRYPTO_XTS=m
diff --git a/arch/m68k/configs/mvme147_defconfig b/arch/m68k/configs/mvme147_defconfig
index ee0f2fbd7fbf..677db3550bd0 100644
--- a/arch/m68k/configs/mvme147_defconfig
+++ b/arch/m68k/configs/mvme147_defconfig
@@ -528,7 +528,6 @@ CONFIG_CRYPTO_ADIANTUM=m
 CONFIG_CRYPTO_ARC4=m
 CONFIG_CRYPTO_CTS=m
 CONFIG_CRYPTO_HCTR2=m
-CONFIG_CRYPTO_KEYWRAP=m
 CONFIG_CRYPTO_LRW=m
 CONFIG_CRYPTO_PCBC=m
 CONFIG_CRYPTO_XTS=m
diff --git a/arch/m68k/configs/mvme16x_defconfig b/arch/m68k/configs/mvme16x_defconfig
index cac90de4f3e7..72ecd1066614 100644
--- a/arch/m68k/configs/mvme16x_defconfig
+++ b/arch/m68k/configs/mvme16x_defconfig
@@ -529,7 +529,6 @@ CONFIG_CRYPTO_ADIANTUM=m
 CONFIG_CRYPTO_ARC4=m
 CONFIG_CRYPTO_CTS=m
 CONFIG_CRYPTO_HCTR2=m
-CONFIG_CRYPTO_KEYWRAP=m
 CONFIG_CRYPTO_LRW=m
 CONFIG_CRYPTO_PCBC=m
 CONFIG_CRYPTO_XTS=m
diff --git a/arch/m68k/configs/q40_defconfig b/arch/m68k/configs/q40_defconfig
index 5301fc6fbd37..4c5b6e0ecd42 100644
--- a/arch/m68k/configs/q40_defconfig
+++ b/arch/m68k/configs/q40_defconfig
@@ -545,7 +545,6 @@ CONFIG_CRYPTO_ADIANTUM=m
 CONFIG_CRYPTO_ARC4=m
 CONFIG_CRYPTO_CTS=m
 CONFIG_CRYPTO_HCTR2=m
-CONFIG_CRYPTO_KEYWRAP=m
 CONFIG_CRYPTO_LRW=m
 CONFIG_CRYPTO_PCBC=m
 CONFIG_CRYPTO_XTS=m
diff --git a/arch/m68k/configs/sun3_defconfig b/arch/m68k/configs/sun3_defconfig
index 1002082c0b5e..0f0f5086fc45 100644
--- a/arch/m68k/configs/sun3_defconfig
+++ b/arch/m68k/configs/sun3_defconfig
@@ -526,7 +526,6 @@ CONFIG_CRYPTO_ADIANTUM=m
 CONFIG_CRYPTO_ARC4=m
 CONFIG_CRYPTO_CTS=m
 CONFIG_CRYPTO_HCTR2=m
-CONFIG_CRYPTO_KEYWRAP=m
 CONFIG_CRYPTO_LRW=m
 CONFIG_CRYPTO_PCBC=m
 CONFIG_CRYPTO_XTS=m
diff --git a/arch/m68k/configs/sun3x_defconfig b/arch/m68k/configs/sun3x_defconfig
index 65c80b7188fd..031f2db97071 100644
--- a/arch/m68k/configs/sun3x_defconfig
+++ b/arch/m68k/configs/sun3x_defconfig
@@ -526,7 +526,6 @@ CONFIG_CRYPTO_ADIANTUM=m
 CONFIG_CRYPTO_ARC4=m
 CONFIG_CRYPTO_CTS=m
 CONFIG_CRYPTO_HCTR2=m
-CONFIG_CRYPTO_KEYWRAP=m
 CONFIG_CRYPTO_LRW=m
 CONFIG_CRYPTO_PCBC=m
 CONFIG_CRYPTO_XTS=m