Electroneum
scalar.h
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1 /***********************************************************************
2  * Copyright (c) 2014 Pieter Wuille *
3  * Distributed under the MIT software license, see the accompanying *
4  * file COPYING or https://www.opensource.org/licenses/mit-license.php.*
5  ***********************************************************************/
6 
7 #ifndef SECP256K1_SCALAR_H
8 #define SECP256K1_SCALAR_H
9 
10 #include "util.h"
11 
12 #if defined(EXHAUSTIVE_TEST_ORDER)
13 #include "scalar_low.h"
14 #elif defined(SECP256K1_WIDEMUL_INT128)
15 #include "scalar_4x64.h"
16 #elif defined(SECP256K1_WIDEMUL_INT64)
17 #include "scalar_8x32.h"
18 #else
19 #error "Please select wide multiplication implementation"
20 #endif
21 
23 static void secp256k1_scalar_clear(secp256k1_scalar *r);
24 
26 static unsigned int secp256k1_scalar_get_bits(const secp256k1_scalar *a, unsigned int offset, unsigned int count);
27 
29 static unsigned int secp256k1_scalar_get_bits_var(const secp256k1_scalar *a, unsigned int offset, unsigned int count);
30 
36 static void secp256k1_scalar_set_b32(secp256k1_scalar *r, const unsigned char *bin, int *overflow);
37 
40 static int secp256k1_scalar_set_b32_seckey(secp256k1_scalar *r, const unsigned char *bin);
41 
43 static void secp256k1_scalar_set_int(secp256k1_scalar *r, unsigned int v);
44 
46 static void secp256k1_scalar_get_b32(unsigned char *bin, const secp256k1_scalar* a);
47 
49 static int secp256k1_scalar_add(secp256k1_scalar *r, const secp256k1_scalar *a, const secp256k1_scalar *b);
50 
52 static void secp256k1_scalar_cadd_bit(secp256k1_scalar *r, unsigned int bit, int flag);
53 
55 static void secp256k1_scalar_mul(secp256k1_scalar *r, const secp256k1_scalar *a, const secp256k1_scalar *b);
56 
59 static int secp256k1_scalar_shr_int(secp256k1_scalar *r, int n);
60 
62 static void secp256k1_scalar_inverse(secp256k1_scalar *r, const secp256k1_scalar *a);
63 
65 static void secp256k1_scalar_inverse_var(secp256k1_scalar *r, const secp256k1_scalar *a);
66 
68 static void secp256k1_scalar_negate(secp256k1_scalar *r, const secp256k1_scalar *a);
69 
71 static int secp256k1_scalar_is_zero(const secp256k1_scalar *a);
72 
74 static int secp256k1_scalar_is_one(const secp256k1_scalar *a);
75 
77 static int secp256k1_scalar_is_even(const secp256k1_scalar *a);
78 
80 static int secp256k1_scalar_is_high(const secp256k1_scalar *a);
81 
84 static int secp256k1_scalar_cond_negate(secp256k1_scalar *a, int flag);
85 
87 static int secp256k1_scalar_eq(const secp256k1_scalar *a, const secp256k1_scalar *b);
88 
90 static void secp256k1_scalar_split_128(secp256k1_scalar *r1, secp256k1_scalar *r2, const secp256k1_scalar *k);
93 static void secp256k1_scalar_split_lambda(secp256k1_scalar *r1, secp256k1_scalar *r2, const secp256k1_scalar *k);
94 
96 static void secp256k1_scalar_mul_shift_var(secp256k1_scalar *r, const secp256k1_scalar *a, const secp256k1_scalar *b, unsigned int shift);
97 
99 static void secp256k1_scalar_cmov(secp256k1_scalar *r, const secp256k1_scalar *a, int flag);
100 
101 #endif /* SECP256K1_SCALAR_H */
mdb_size_t count(MDB_cursor *cur)
const GenericPointer< typename T::ValueType > T2 T::AllocatorType & a
Definition: pointer.h:1124