[CRYPTO] api: Split out low-level API

The crypto API is made up of the part facing users such as IPsec and the
low-level part which is used by cryptographic entities such as algorithms.
This patch splits out the latter so that the two APIs are more clearly
delineated.  As a bonus the low-level API can now be modularised if all
algorithms are built as modules.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 50 insertions, 34 deletions

diff --git a/crypto/Kconfig b/crypto/Kconfig
index fa927a287a1d..aabc63195222 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -9,47 +9,54 @@ config CRYPTO
         help
           This option provides the core Cryptographic API.
 
+if CRYPTO
+
+config CRYPTO_ALGAPI
+        tristate
+        help
+          This option provides the API for cryptographic algorithms.
+
 config CRYPTO_HMAC
         bool "HMAC support"
-        depends on CRYPTO
         help
           HMAC: Keyed-Hashing for Message Authentication (RFC2104).
           This is required for IPSec.
 
 config CRYPTO_NULL
         tristate "Null algorithms"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           These are 'Null' algorithms, used by IPsec, which do nothing.
 
 config CRYPTO_MD4
         tristate "MD4 digest algorithm"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           MD4 message digest algorithm (RFC1320).
 
 config CRYPTO_MD5
         tristate "MD5 digest algorithm"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           MD5 message digest algorithm (RFC1321).
 
 config CRYPTO_SHA1
         tristate "SHA1 digest algorithm"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2).
 
 config CRYPTO_SHA1_S390
         tristate "SHA1 digest algorithm (s390)"
-        depends on CRYPTO && S390
+        depends on S390
+        select CRYPTO_ALGAPI
         help
           This is the s390 hardware accelerated implementation of the
           SHA-1 secure hash standard (FIPS 180-1/DFIPS 180-2).
 
 config CRYPTO_SHA256
         tristate "SHA256 digest algorithm"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           SHA256 secure hash standard (DFIPS 180-2).
           
@@ -58,7 +65,8 @@ config CRYPTO_SHA256
 
 config CRYPTO_SHA256_S390
         tristate "SHA256 digest algorithm (s390)"
-        depends on CRYPTO && S390
+        depends on S390
+        select CRYPTO_ALGAPI
         help
           This is the s390 hardware accelerated implementation of the
           SHA256 secure hash standard (DFIPS 180-2).
@@ -68,7 +76,7 @@ config CRYPTO_SHA256_S390
 
 config CRYPTO_SHA512
         tristate "SHA384 and SHA512 digest algorithms"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           SHA512 secure hash standard (DFIPS 180-2).
           
@@ -80,7 +88,7 @@ config CRYPTO_SHA512
 
 config CRYPTO_WP512
         tristate "Whirlpool digest algorithms"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           Whirlpool hash algorithm 512, 384 and 256-bit hashes
 
@@ -92,7 +100,7 @@ config CRYPTO_WP512
 
 config CRYPTO_TGR192
         tristate "Tiger digest algorithms"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           Tiger hash algorithm 192, 160 and 128-bit hashes
 
@@ -105,19 +113,20 @@ config CRYPTO_TGR192
 
 config CRYPTO_DES
         tristate "DES and Triple DES EDE cipher algorithms"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           DES cipher algorithm (FIPS 46-2), and Triple DES EDE (FIPS 46-3).
 
 config CRYPTO_DES_S390
         tristate "DES and Triple DES cipher algorithms (s390)"
-        depends on CRYPTO && S390
+        depends on S390
+        select CRYPTO_ALGAPI
         help
           DES cipher algorithm (FIPS 46-2), and Triple DES EDE (FIPS 46-3).
 
 config CRYPTO_BLOWFISH
         tristate "Blowfish cipher algorithm"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           Blowfish cipher algorithm, by Bruce Schneier.
           
@@ -130,7 +139,7 @@ config CRYPTO_BLOWFISH
 
 config CRYPTO_TWOFISH
         tristate "Twofish cipher algorithm"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         select CRYPTO_TWOFISH_COMMON
         help
           Twofish cipher algorithm.
@@ -145,14 +154,14 @@ config CRYPTO_TWOFISH
 
 config CRYPTO_TWOFISH_COMMON
         tristate
-        depends on CRYPTO
         help
           Common parts of the Twofish cipher algorithm shared by the
           generic c and the assembler implementations.
 
 config CRYPTO_TWOFISH_586
         tristate "Twofish cipher algorithms (i586)"
-        depends on CRYPTO && ((X86 || UML_X86) && !64BIT)
+        depends on (X86 || UML_X86) && !64BIT
+        select CRYPTO_ALGAPI
         select CRYPTO_TWOFISH_COMMON
         help
           Twofish cipher algorithm.
@@ -167,7 +176,8 @@ config CRYPTO_TWOFISH_586
 
 config CRYPTO_TWOFISH_X86_64
         tristate "Twofish cipher algorithm (x86_64)"
-        depends on CRYPTO && ((X86 || UML_X86) && 64BIT)
+        depends on (X86 || UML_X86) && 64BIT
+        select CRYPTO_ALGAPI
         select CRYPTO_TWOFISH_COMMON
         help
           Twofish cipher algorithm (x86_64).
@@ -182,7 +192,7 @@ config CRYPTO_TWOFISH_X86_64
 
 config CRYPTO_SERPENT
         tristate "Serpent cipher algorithm"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           Serpent cipher algorithm, by Anderson, Biham & Knudsen.
 
@@ -195,7 +205,7 @@ config CRYPTO_SERPENT
 
 config CRYPTO_AES
         tristate "AES cipher algorithms"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           AES cipher algorithms (FIPS-197). AES uses the Rijndael 
           algorithm.
@@ -215,7 +225,8 @@ config CRYPTO_AES
 
 config CRYPTO_AES_586
         tristate "AES cipher algorithms (i586)"
-        depends on CRYPTO && ((X86 || UML_X86) && !64BIT)
+        depends on (X86 || UML_X86) && !64BIT
+        select CRYPTO_ALGAPI
         help
           AES cipher algorithms (FIPS-197). AES uses the Rijndael 
           algorithm.
@@ -235,7 +246,8 @@ config CRYPTO_AES_586
 
 config CRYPTO_AES_X86_64
         tristate "AES cipher algorithms (x86_64)"
-        depends on CRYPTO && ((X86 || UML_X86) && 64BIT)
+        depends on (X86 || UML_X86) && 64BIT
+        select CRYPTO_ALGAPI
         help
           AES cipher algorithms (FIPS-197). AES uses the Rijndael 
           algorithm.
@@ -255,7 +267,8 @@ config CRYPTO_AES_X86_64
 
 config CRYPTO_AES_S390
         tristate "AES cipher algorithms (s390)"
-        depends on CRYPTO && S390
+        depends on S390
+        select CRYPTO_ALGAPI
         help
           This is the s390 hardware accelerated implementation of the
           AES cipher algorithms (FIPS-197). AES uses the Rijndael
@@ -275,21 +288,21 @@ config CRYPTO_AES_S390
 
 config CRYPTO_CAST5
         tristate "CAST5 (CAST-128) cipher algorithm"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           The CAST5 encryption algorithm (synonymous with CAST-128) is
           described in RFC2144.
 
 config CRYPTO_CAST6
         tristate "CAST6 (CAST-256) cipher algorithm"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           The CAST6 encryption algorithm (synonymous with CAST-256) is
           described in RFC2612.
 
 config CRYPTO_TEA
         tristate "TEA, XTEA and XETA cipher algorithms"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           TEA cipher algorithm.
 
@@ -306,7 +319,7 @@ config CRYPTO_TEA
 
 config CRYPTO_ARC4
         tristate "ARC4 cipher algorithm"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           ARC4 cipher algorithm.
 
@@ -317,7 +330,7 @@ config CRYPTO_ARC4
 
 config CRYPTO_KHAZAD
         tristate "Khazad cipher algorithm"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           Khazad cipher algorithm.
 
@@ -330,7 +343,7 @@ config CRYPTO_KHAZAD
 
 config CRYPTO_ANUBIS
         tristate "Anubis cipher algorithm"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           Anubis cipher algorithm.
 
@@ -345,7 +358,7 @@ config CRYPTO_ANUBIS
 
 config CRYPTO_DEFLATE
         tristate "Deflate compression algorithm"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         select ZLIB_INFLATE
         select ZLIB_DEFLATE
         help
@@ -356,7 +369,7 @@ config CRYPTO_DEFLATE
 
 config CRYPTO_MICHAEL_MIC
         tristate "Michael MIC keyed digest algorithm"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         help
           Michael MIC is used for message integrity protection in TKIP
           (IEEE 802.11i). This algorithm is required for TKIP, but it
@@ -365,7 +378,7 @@ config CRYPTO_MICHAEL_MIC
 
 config CRYPTO_CRC32C
         tristate "CRC32c CRC algorithm"
-        depends on CRYPTO
+        select CRYPTO_ALGAPI
         select LIBCRC32C
         help
           Castagnoli, et al Cyclic Redundancy-Check Algorithm.  Used
@@ -375,10 +388,13 @@ config CRYPTO_CRC32C
 
 config CRYPTO_TEST
         tristate "Testing module"
-        depends on CRYPTO && m
+        depends on m
+        select CRYPTO_ALGAPI
         help
           Quick & dirty crypto test module.
 
 source "drivers/crypto/Kconfig"
-endmenu
 
+endif   # if CRYPTO
+
+endmenu