Mailing List Archive

* cipher/rijndael.c (do_setkey): Reduce number of ifdefs by using
function pointer for accelerated key-setup.
--

Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
---
cipher/rijndael.c | 26 ++++++++------------------
1 file changed, 8 insertions(+), 18 deletions(-)

diff --git a/cipher/rijndael.c b/cipher/rijndael.c
index 3e9bae55..d81ed809 100644
--- a/cipher/rijndael.c
+++ b/cipher/rijndael.c
@@ -353,6 +353,7 @@ do_setkey (RIJNDAEL_context *ctx, const byte *key, const unsigned keylen,
{
static int initialized = 0;
static const char *selftest_failed = 0;
+ void (*hw_setkey)(RIJNDAEL_context *ctx, const byte *key) = NULL;
int rounds;
int i,j, r, t, rconpointer = 0;
int KC;
@@ -432,6 +433,7 @@ do_setkey (RIJNDAEL_context *ctx, const byte *key, const unsigned keylen,
#ifdef USE_AESNI
else if (hwfeatures & HWF_INTEL_AESNI)
{
+ hw_setkey = _gcry_aes_aesni_do_setkey;
ctx->encrypt_fn = _gcry_aes_aesni_encrypt;
ctx->decrypt_fn = _gcry_aes_aesni_decrypt;
ctx->prefetch_enc_fn = NULL;
@@ -466,6 +468,7 @@ do_setkey (RIJNDAEL_context *ctx, const byte *key, const unsigned keylen,
#ifdef USE_SSSE3
else if (hwfeatures & HWF_INTEL_SSSE3)
{
+ hw_setkey = _gcry_aes_ssse3_do_setkey;
ctx->encrypt_fn = _gcry_aes_ssse3_encrypt;
ctx->decrypt_fn = _gcry_aes_ssse3_decrypt;
ctx->prefetch_enc_fn = NULL;
@@ -486,6 +489,7 @@ do_setkey (RIJNDAEL_context *ctx, const byte *key, const unsigned keylen,
#ifdef USE_ARM_CE
else if (hwfeatures & HWF_ARM_AES)
{
+ hw_setkey = _gcry_aes_armv8_ce_setkey;
ctx->encrypt_fn = _gcry_aes_armv8_ce_encrypt;
ctx->decrypt_fn = _gcry_aes_armv8_ce_decrypt;
ctx->prefetch_enc_fn = NULL;
@@ -507,6 +511,7 @@ do_setkey (RIJNDAEL_context *ctx, const byte *key, const unsigned keylen,
#ifdef USE_PPC_CRYPTO_WITH_PPC9LE
else if ((hwfeatures & HWF_PPC_VCRYPTO) && (hwfeatures & HWF_PPC_ARCH_3_00))
{
+ hw_setkey = _gcry_aes_ppc8_setkey;
ctx->encrypt_fn = _gcry_aes_ppc9le_encrypt;
ctx->decrypt_fn = _gcry_aes_ppc9le_decrypt;
ctx->prefetch_enc_fn = NULL;
@@ -529,6 +534,7 @@ do_setkey (RIJNDAEL_context *ctx, const byte *key, const unsigned keylen,
#ifdef USE_PPC_CRYPTO
else if (hwfeatures & HWF_PPC_VCRYPTO)
{
+ hw_setkey = _gcry_aes_ppc8_setkey;
ctx->encrypt_fn = _gcry_aes_ppc8_encrypt;
ctx->decrypt_fn = _gcry_aes_ppc8_decrypt;
ctx->prefetch_enc_fn = NULL;
@@ -557,26 +563,10 @@ do_setkey (RIJNDAEL_context *ctx, const byte *key, const unsigned keylen,

/* NB: We don't yet support Padlock hardware key generation. */

- if (0)
+ if (hw_setkey)
{
- ;
+ hw_setkey (ctx, key);
}
-#ifdef USE_AESNI
- else if (ctx->use_aesni)
- _gcry_aes_aesni_do_setkey (ctx, key);
-#endif
-#ifdef USE_SSSE3
- else if (ctx->use_ssse3)
- _gcry_aes_ssse3_do_setkey (ctx, key);
-#endif
-#ifdef USE_ARM_CE
- else if (ctx->use_arm_ce)
- _gcry_aes_armv8_ce_setkey (ctx, key);
-#endif
-#ifdef USE_PPC_CRYPTO
- else if (ctx->use_ppc_crypto)
- _gcry_aes_ppc8_setkey (ctx, key);
-#endif
else
{
const byte *sbox = ((const byte *)encT) + 1;
--
2.25.1


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