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Add secp256k1_pubkey_sort

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Co-authored-by: Tim Ruffing <crypto@timruffing.de>
Co-authored-by: Russell O'Connor <roconnor@blockstream.io>
This commit is contained in:
Jonas Nick
2024-04-17 17:33:51 +00:00
parent da515074e3
commit 7d2591ce12
7 changed files with 437 additions and 0 deletions
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29
src/secp256k1.c
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@@ -36,6 +36,7 @@
#include "int128_impl.h"
#include "scratch_impl.h"
#include "selftest.h"
#include "hsort_impl.h"
#ifdef SECP256K1_NO_BUILD
# error "secp256k1.h processed without SECP256K1_BUILD defined while building secp256k1.c"
@@ -325,6 +326,34 @@ int secp256k1_ec_pubkey_cmp(const secp256k1_context* ctx, const secp256k1_pubkey
return secp256k1_memcmp_var(out[0], out[1], sizeof(out[0]));
}
static int secp256k1_ec_pubkey_sort_cmp(const void* pk1, const void* pk2, void *ctx) {
return secp256k1_ec_pubkey_cmp((secp256k1_context *)ctx,
*(secp256k1_pubkey **)pk1,
*(secp256k1_pubkey **)pk2);
}
int secp256k1_ec_pubkey_sort(const secp256k1_context* ctx, const secp256k1_pubkey **pubkeys, size_t n_pubkeys) {
VERIFY_CHECK(ctx != NULL);
ARG_CHECK(pubkeys != NULL);
/* Suppress wrong warning (fixed in MSVC 19.33) */
#if defined(_MSC_VER) && (_MSC_VER < 1933)
#pragma warning(push)
#pragma warning(disable: 4090)
#endif
/* Casting away const is fine because neither secp256k1_hsort nor
* secp256k1_ec_pubkey_sort_cmp modify the data pointed to by the cmp_data
* argument. */
secp256k1_hsort(pubkeys, n_pubkeys, sizeof(*pubkeys), secp256k1_ec_pubkey_sort_cmp, (void *)ctx);
#if defined(_MSC_VER) && (_MSC_VER < 1933)
#pragma warning(pop)
#endif
return 1;
}
static void secp256k1_ecdsa_signature_load(const secp256k1_context* ctx, secp256k1_scalar* r, secp256k1_scalar* s, const secp256k1_ecdsa_signature* sig) {
(void)ctx;
if (sizeof(secp256k1_scalar) == 32) {