[PATCH v4] lib/crypto: add prompts back to crypto libraries

[Jason A. Donenfeld]

From: "Justin M. Forbes" <jforbes@xxxxxxxxxxxxxxxxx>

Commit 6048fdcc5f269 ("lib/crypto: blake2s: include as built-in") took
away a number of prompt texts from other crypto libraries. This makes
values flip from built-in to module when oldconfig runs, and causes
problems when these crypto libs need to be built in for thingslike
BIG_KEYS.

Fixes: 6048fdcc5f269 ("lib/crypto: blake2s: include as built-in")
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: linux-crypto@xxxxxxxxxxxxxxx
Signed-off-by: Justin M. Forbes <jforbes@xxxxxxxxxxxxxxxxx>
[Jason: - moved menu into submenu of lib/ instead of root menu
        - fixed chacha sub-dependencies for CONFIG_CRYPTO]
Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx>
---
 crypto/Kconfig     |  2 --
 lib/Kconfig        |  2 ++
 lib/crypto/Kconfig | 17 ++++++++++++-----
 3 files changed, 14 insertions(+), 7 deletions(-)

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 55718de56137..a346b6f74bb3 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1924,5 +1924,3 @@ source "crypto/asymmetric_keys/Kconfig"
 source "certs/Kconfig"
 
 endif	# if CRYPTO
-
-source "lib/crypto/Kconfig"
diff --git a/lib/Kconfig b/lib/Kconfig
index 5e7165e6a346..9534698ce890 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -122,6 +122,8 @@ config INDIRECT_IOMEM_FALLBACK
 	  mmio accesses when the IO memory address is not a registered
 	  emulated region.
 
+source "lib/crypto/Kconfig"
+
 config CRC_CCITT
 	tristate "CRC-CCITT functions"
 	help
diff --git a/lib/crypto/Kconfig b/lib/crypto/Kconfig
index 8620f38e117c..e8e525650cf2 100644
--- a/lib/crypto/Kconfig
+++ b/lib/crypto/Kconfig
@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 
+menu "Crypto library routines"
+
 config CRYPTO_LIB_AES
 	tristate
 
@@ -31,7 +33,7 @@ config CRYPTO_ARCH_HAVE_LIB_CHACHA
 
 config CRYPTO_LIB_CHACHA_GENERIC
 	tristate
-	select CRYPTO_ALGAPI
+	select XOR_BLOCKS
 	help
 	  This symbol can be depended upon by arch implementations of the
 	  ChaCha library interface that require the generic code as a
@@ -40,7 +42,8 @@ config CRYPTO_LIB_CHACHA_GENERIC
 	  of CRYPTO_LIB_CHACHA.
 
 config CRYPTO_LIB_CHACHA
-	tristate
+	tristate "ChaCha library interface"
+	depends on CRYPTO
 	depends on CRYPTO_ARCH_HAVE_LIB_CHACHA || !CRYPTO_ARCH_HAVE_LIB_CHACHA
 	select CRYPTO_LIB_CHACHA_GENERIC if CRYPTO_ARCH_HAVE_LIB_CHACHA=n
 	help
@@ -65,7 +68,7 @@ config CRYPTO_LIB_CURVE25519_GENERIC
 	  of CRYPTO_LIB_CURVE25519.
 
 config CRYPTO_LIB_CURVE25519
-	tristate
+	tristate "Curve25519 scalar multiplication library"
 	depends on CRYPTO_ARCH_HAVE_LIB_CURVE25519 || !CRYPTO_ARCH_HAVE_LIB_CURVE25519
 	select CRYPTO_LIB_CURVE25519_GENERIC if CRYPTO_ARCH_HAVE_LIB_CURVE25519=n
 	help
@@ -100,7 +103,7 @@ config CRYPTO_LIB_POLY1305_GENERIC
 	  of CRYPTO_LIB_POLY1305.
 
 config CRYPTO_LIB_POLY1305
-	tristate
+	tristate "Poly1305 library interface"
 	depends on CRYPTO_ARCH_HAVE_LIB_POLY1305 || !CRYPTO_ARCH_HAVE_LIB_POLY1305
 	select CRYPTO_LIB_POLY1305_GENERIC if CRYPTO_ARCH_HAVE_LIB_POLY1305=n
 	help
@@ -109,14 +112,18 @@ config CRYPTO_LIB_POLY1305
 	  is available and enabled.
 
 config CRYPTO_LIB_CHACHA20POLY1305
-	tristate
+	tristate "ChaCha20-Poly1305 AEAD support (8-byte nonce library version)"
 	depends on CRYPTO_ARCH_HAVE_LIB_CHACHA || !CRYPTO_ARCH_HAVE_LIB_CHACHA
 	depends on CRYPTO_ARCH_HAVE_LIB_POLY1305 || !CRYPTO_ARCH_HAVE_LIB_POLY1305
+	depends on CRYPTO
 	select CRYPTO_LIB_CHACHA
 	select CRYPTO_LIB_POLY1305
+	select CRYPTO_ALGAPI
 
 config CRYPTO_LIB_SHA256
 	tristate
 
 config CRYPTO_LIB_SM4
 	tristate
+
+endmenu
-- 
2.34.1