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Get rid of hex format and some binary conversions

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This commit is contained in:
Pieter Wuille
2015-02-23 04:17:37 -08:00
parent 0bada0e2a9
commit 443cd4b8ee
5 changed files with 63 additions and 144 deletions
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41
src/field_impl.h
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@@ -21,47 +21,6 @@
#error "Please select field implementation"
#endif
static void secp256k1_fe_get_hex(char *r64, const secp256k1_fe_t *a) {
secp256k1_fe_t b;
int i;
unsigned char tmp[32];
b = *a;
secp256k1_fe_normalize(&b);
secp256k1_fe_get_b32(tmp, &b);
for (i=0; i<32; i++) {
/* Hex character table. */
static const char *c = "0123456789ABCDEF";
r64[2*i] = c[(tmp[i] >> 4) & 0xF];
r64[2*i+1] = c[(tmp[i]) & 0xF];
}
}
static int secp256k1_fe_set_hex(secp256k1_fe_t *r, const char *a64) {
int i;
unsigned char tmp[32];
/* Byte to hex value table. */
static const int cvt[256] = {0, 0, 0, 0, 0, 0, 0,0,0,0,0,0,0,0,0,0,
0, 0, 0, 0, 0, 0, 0,0,0,0,0,0,0,0,0,0,
0, 0, 0, 0, 0, 0, 0,0,0,0,0,0,0,0,0,0,
0, 1, 2, 3, 4, 5, 6,7,8,9,0,0,0,0,0,0,
0,10,11,12,13,14,15,0,0,0,0,0,0,0,0,0,
0, 0, 0, 0, 0, 0, 0,0,0,0,0,0,0,0,0,0,
0,10,11,12,13,14,15,0,0,0,0,0,0,0,0,0,
0, 0, 0, 0, 0, 0, 0,0,0,0,0,0,0,0,0,0,
0, 0, 0, 0, 0, 0, 0,0,0,0,0,0,0,0,0,0,
0, 0, 0, 0, 0, 0, 0,0,0,0,0,0,0,0,0,0,
0, 0, 0, 0, 0, 0, 0,0,0,0,0,0,0,0,0,0,
0, 0, 0, 0, 0, 0, 0,0,0,0,0,0,0,0,0,0,
0, 0, 0, 0, 0, 0, 0,0,0,0,0,0,0,0,0,0,
0, 0, 0, 0, 0, 0, 0,0,0,0,0,0,0,0,0,0,
0, 0, 0, 0, 0, 0, 0,0,0,0,0,0,0,0,0,0,
0, 0, 0, 0, 0, 0, 0,0,0,0,0,0,0,0,0,0};
for (i=0; i<32; i++) {
tmp[i] = (cvt[(unsigned char)a64[2*i]] << 4) + cvt[(unsigned char)a64[2*i+1]];
}
return secp256k1_fe_set_b32(r, tmp);
}
SECP256K1_INLINE static int secp256k1_fe_equal_var(const secp256k1_fe_t *a, const secp256k1_fe_t *b) {
secp256k1_fe_t na;
secp256k1_fe_negate(&na, a, 1);