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Fix PSK client callback

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This commit is contained in:
Bruno Silvestre 2023-02-16 10:28:34 -03:00
parent 9b09c93249
commit dd8ba1fc92
1 changed files with 27 additions and 23 deletions
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46
src/context.c
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@ -763,16 +763,16 @@ static int set_server_psk_cb(lua_State *L)
return 1;
}
static unsigned int client_psk_cb(
SSL *ssl, const char *hint,
char *identity, unsigned int max_identity_len,
unsigned char *psk, unsigned int max_psk_len
)
/*
* Client callback to PSK.
*/
static unsigned int client_psk_cb(SSL *ssl, const char *hint, char *identity, unsigned int max_identity_len,
unsigned char *psk, unsigned int max_psk_len)
{
int identity_len;
const char *ret_identity;
int psk_len;
size_t psk_len;
size_t identity_len;
const char *ret_psk;
const char *ret_identity;
SSL_CTX *ctx = SSL_get_SSL_CTX(ssl);
p_context pctx = (p_context)SSL_CTX_get_app_data(ctx);
lua_State *L = pctx->L;
@ -781,30 +781,34 @@ static unsigned int client_psk_cb(
lua_pushlightuserdata(L, (void*)pctx->context);
lua_gettable(L, -2);
if (hint) {
lua_pushlstring(L, hint, strlen(hint));
} else {
lua_pushlstring(L, "", 0);
}
lua_pushnumber(L, max_psk_len, max_psk_len);
if (hint)
lua_pushstring(L, hint);
else
lua_pushnil(L);
lua_call(L, 2, 2);
// Leave space to '\0'
lua_pushinteger(L, max_identity_len-1);
lua_pushinteger(L, max_psk_len);
lua_call(L, 3, 2);
if (!lua_isstring(L, -1) || !lua_isstring(L, -2)) {
lua_pop(L, 2);
return 0;
}
ret_identity = luaL_checklstring(L, -2, &identity_len);
ret_psk = luaL_checklstring(L, -1, &psk_len);
if (identity_len > max_identity_len) identity_len = max_identity_len;
if (psk_len > max_psk_len) psk_len = max_psk_len;
ret_identity = luaL_tolstring(L, -2, &identity_len);
ret_psk = luaL_tolstring(L, -1, &psk_len);
if (ret_identity >= max_identity_len || psk_len > max_psk_len)
psk_len = 0;
else {
memcpy(identity, ret_identity, identity_len);
identity[ret_identity] = 0;
memcpy(psk, ret_psk, psk_len);
}
lua_pop(L, 2);
lua_pop(L, 3);
return psk_len;
}