frost/secp256k1-zkp
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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.
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Tim Ruffing committed 2020-02-14 16:18:00 +01:00
1 parent 856a01d6ad
commit eb45ef3384
2 files changed
+18 -14
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src/modules/ecdh/main_impl.h
+3 -3
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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;