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Clarify that a secp256k1_ecdh_hash_function must return 0 or 1

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and improve style of the ECDH docs.
This commit is contained in:
Tim Ruffing
2020-02-10 12:55:30 +01:00
parent 856a01d6ad
commit eb45ef3384
2 changed files with 18 additions and 14 deletions
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6
src/modules/ecdh/main_impl.h
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@@ -10,14 +10,14 @@
#include "include/secp256k1_ecdh.h"
#include "ecmult_const_impl.h"
static int ecdh_hash_function_sha256(unsigned char *output, const unsigned char *x, const unsigned char *y, void *data) {
unsigned char version = (y[31] & 0x01) | 0x02;
static int ecdh_hash_function_sha256(unsigned char *output, const unsigned char *x32, const unsigned char *y32, void *data) {
unsigned char version = (y32[31] & 0x01) | 0x02;
secp256k1_sha256 sha;
(void)data;
secp256k1_sha256_initialize(&sha);
secp256k1_sha256_write(&sha, &version, 1);
secp256k1_sha256_write(&sha, x, 32);
secp256k1_sha256_write(&sha, x32, 32);
secp256k1_sha256_finalize(&sha, output);
return 1;