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crypto: sha256 - Make lib/crypto/sha256.c suitable for generic use

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Before this commit lib/crypto/sha256.c has only been used in the s390 and
x86 purgatory code, make it suitable for generic use:

* Export interesting symbols
* Add  -D__DISABLE_EXPORTS to CFLAGS_sha256.o for purgatory builds to
  avoid the exports for the purgatory builds
* Add to lib/crypto/Makefile and crypto/Kconfig

Signed-off-by: Hans de Goede <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Hans de Goede 2019-08-17 16:24:33 +02:00 • committed by Herbert Xu
commit 01d3aee866
6 changed files with 17 additions and 2 deletions
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3
crypto/Kconfig
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@ -849,6 +849,9 @@ config CRYPTO_SHA1_PPC_SPE
SHA-1 secure hash standard (DFIPS 180-4) implemented
using powerpc SPE SIMD instruction set.
config CRYPTO_LIB_SHA256
tristate
config CRYPTO_SHA256
tristate "SHA224 and SHA256 digest algorithm"
select CRYPTO_HASH