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| author | Niels Möller <nisse@lysator.liu.se> | 2014-08-02 21:28:08 +0200 |
|---|---|---|
| committer | Niels Möller <nisse@lysator.liu.se> | 2014-08-02 21:28:08 +0200 |
| commit | 98333dcd3a154ca5fffae044d594a338749ef96a (patch) | |
| tree | cad273d73727810d3e5694ce5d004e6858e06b50 | |
| parent | 7fa54ac583030a6a68b0c5bd12d1cdfddd0ee45c (diff) | |
| download | nettle-98333dcd3a154ca5fffae044d594a338749ef96a.tar.gz | |
Fixed window-based ecc_mul_a_eh.
| -rw-r--r-- | ChangeLog | 8 | ||||
| -rw-r--r-- | ecc-internal.h | 5 | ||||
| -rw-r--r-- | ecc-mul-a-eh.c | 3 |
3 files changed, 11 insertions, 5 deletions
@@ -1,3 +1,11 @@ +2014-08-02 Niels Möller <nisse@lysator.liu.se> + + * ecc-internal.h (ECC_MUL_A_EH_WBITS): Set to 4, to enable + window-based scalar multiplication. + + * ecc-mul-a-eh.c (table_init) [ECC_MUL_A_EH_WBITS > 0]: Fixed + initialization of TABLE(1). + 2014-07-29 Niels Möller <nisse@lysator.liu.se> * ecc-internal.h (ECC_MUL_A_EH_WBITS): New constant. diff --git a/ecc-internal.h b/ecc-internal.h index e233b64f..2ed15ca7 100644 --- a/ecc-internal.h +++ b/ecc-internal.h @@ -68,11 +68,12 @@ /* Window size for ecc_mul_a. Using 4 bits seems like a good choice, for both Intel x86_64 and ARM Cortex A9. For the larger curves, of - 384 and 521 bits, we could improve seepd by a few percent if we go + 384 and 521 bits, we could improve speed by a few percent if we go up to 5 bits, but I don't think that's worth doubling the storage. */ #define ECC_MUL_A_WBITS 4 -#define ECC_MUL_A_EH_WBITS 0 +/* And for ecc_mul_a_eh */ +#define ECC_MUL_A_EH_WBITS 4 /* Reduces from 2*ecc->size to ecc->size. */ diff --git a/ecc-mul-a-eh.c b/ecc-mul-a-eh.c index ad017565..1e9f4fc7 100644 --- a/ecc-mul-a-eh.c +++ b/ecc-mul-a-eh.c @@ -91,8 +91,6 @@ ecc_mul_a_eh (const struct ecc_curve *ecc, } #else /* ECC_MUL_A_EH_WBITS > 1 */ -#error Not yet working - #define TABLE_SIZE (1U << ECC_MUL_A_EH_WBITS) #define TABLE_MASK (TABLE_SIZE - 1) @@ -111,7 +109,6 @@ table_init (const struct ecc_curve *ecc, TABLE(0)[ecc->size] = TABLE(0)[2*ecc->size] = 1; ecc_a_to_eh (ecc, TABLE(1), p, scratch); - mpn_copyi (TABLE(1), p, 3*ecc->size); for (j = 2; j < size; j += 2) { |