37 lines
1019 B
C
37 lines
1019 B
C
#include <bitcoin/privkey.h>
|
|
#include <ccan/array_size/array_size.h>
|
|
#include <ccan/mem/mem.h>
|
|
#include <common/hmac.h>
|
|
#include <wire/wire.h>
|
|
|
|
void hmac(const void *src, size_t slen,
|
|
const void *key, size_t klen,
|
|
struct hmac *hmac)
|
|
{
|
|
crypto_auth_hmacsha256_state state;
|
|
|
|
crypto_auth_hmacsha256_init(&state, memcheck(key, klen), klen);
|
|
crypto_auth_hmacsha256_update(&state, memcheck(src, slen), slen);
|
|
crypto_auth_hmacsha256_final(&state, hmac->bytes);
|
|
}
|
|
|
|
void subkey_from_hmac(const char *prefix,
|
|
const struct secret *base,
|
|
struct secret *key)
|
|
{
|
|
struct hmac h;
|
|
hmac(base->data, sizeof(base->data), prefix, strlen(prefix), &h);
|
|
BUILD_ASSERT(sizeof(h.bytes) == sizeof(key->data));
|
|
memcpy(key->data, h.bytes, sizeof(key->data));
|
|
}
|
|
|
|
void towire_hmac(u8 **pptr, const struct hmac *hmac)
|
|
{
|
|
towire_u8_array(pptr, hmac->bytes, ARRAY_SIZE(hmac->bytes));
|
|
}
|
|
|
|
void fromwire_hmac(const u8 **ptr, size_t *max, struct hmac *hmac)
|
|
{
|
|
fromwire_u8_array(ptr, max, hmac->bytes, ARRAY_SIZE(hmac->bytes));
|
|
}
|