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Expose bip39 to script, and fix some things around base64 so that I can round trip it properly.

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git-svn-id: https://www.unprompted.com/svn/projects/tildefriends/trunk@4729 ed5197a5-7fde-0310-b194-c3ffbd925b24
This commit is contained in:
Cory McWilliams 2024-01-03 17:25:34 +00:00
parent 34a87d8b3b
commit c78753f3ff
3 changed files with 62 additions and 7 deletions
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4
core/auth.js
View File

@ -45,12 +45,12 @@ function readSession(session) {
let jwt_parts = session?.split('.');
if (jwt_parts?.length === 3) {
let [header, payload, signature] = jwt_parts;
header = JSON.parse(base64Decode(unb64url(header)));
header = JSON.parse(utf8Decode(base64Decode(unb64url(header))));
if (header.typ === 'JWT' && header.alg === 'HS256') {
signature = unb64url(signature);
let id = ssb.getIdentities(':auth');
if (id?.length && ssb.hmacsha256verify(id[0], payload, signature)) {
let result = JSON.parse(base64Decode(unb64url(payload)));
let result = JSON.parse(utf8Decode(base64Decode(unb64url(payload))));
let now = new Date().valueOf()
if (now < result.exp) {
print(`JWT valid for another ${(result.exp - now) / 1000} seconds.`);

2
src/tests.c
View File

@ -653,7 +653,7 @@ static void _test_b64(const tf_test_options_t* options)
fprintf(file,
"'use strict';\n"
"print(base64Encode('hello'));\n"
"let x = base64Decode(base64Encode('hello'));\n"
"let x = utf8Decode(base64Decode(base64Encode('hello')));\n"
"if (x !== 'hello') {\n"
" print(x);\n"
" exit(1);\n"

63
src/util.js.c
View File

@ -1,5 +1,6 @@
#include "util.js.h"
#include "bip39.h"
#include "log.h"
#include "mem.h"
#include "task.h"
@ -71,8 +72,20 @@ JSValue tf_util_utf8_decode(JSContext* context, JSValue value)
static JSValue _util_base64_encode(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)
{
JSValue result = JS_UNDEFINED;
JSValue buffer = JS_UNDEFINED;
size_t length = 0;
uint8_t* array = tf_util_try_get_array_buffer(context, &length, argv[0]);
if (!array)
{
size_t offset;
size_t element_size;
buffer = tf_util_try_get_typed_array_buffer(context, argv[0], &offset, &length, &element_size);
if (!JS_IsException(buffer))
{
array = tf_util_try_get_array_buffer(context, &length, buffer);
}
}
if (array)
{
char* encoded = tf_malloc(length * 4);
@ -95,6 +108,7 @@ static JSValue _util_base64_encode(JSContext* context, JSValueConst this_val, in
tf_free(encoded);
JS_FreeCString(context, value);
}
JS_FreeValue(context, buffer);
return result;
}
@ -103,19 +117,58 @@ static JSValue _util_base64_decode(JSContext* context, JSValueConst this_val, in
JSValue result = JS_UNDEFINED;
size_t length = 0;
const char* value = JS_ToCStringLen(context, &length, argv[0]);
uint8_t* encoded = tf_malloc(length);
uint8_t* decoded = tf_malloc(length);
int r = tf_base64_decode(value, length, encoded, length);
int r = tf_base64_decode(value, length, decoded, length);
if (r >= 0)
{
result = JS_NewStringLen(context, (const char*)encoded, r);
result = tf_util_new_uint8_array(context, decoded, r);
}
tf_free(encoded);
tf_free(decoded);
JS_FreeCString(context, value);
return result;
}
static JSValue _util_bip39_words(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)
{
JSValue result = JS_UNDEFINED;
JSValue buffer = JS_UNDEFINED;
size_t length;
uint8_t* array = tf_util_try_get_array_buffer(context, &length, argv[0]);
if (!array)
{
size_t offset;
size_t element_size;
buffer = tf_util_try_get_typed_array_buffer(context, argv[0], &offset, &length, &element_size);
if (!JS_IsException(buffer))
{
array = tf_util_try_get_array_buffer(context, &length, buffer);
}
}
char words[2048] = "";
if (array && tf_bip39_bytes_to_words(array, length, words, sizeof(words)))
{
result = JS_NewString(context, words);
}
JS_FreeValue(context, buffer);
return result;
}
static JSValue _util_bip39_bytes(JSContext* context, JSValueConst this_val, int argc, JSValueConst* argv)
{
const char* words = JS_ToCString(context, argv[0]);
uint8_t bytes[33] = { 0 };
bool success = tf_bip39_words_to_bytes(words, bytes, sizeof(bytes));
JS_FreeCString(context, words);
if (success)
{
return tf_util_new_uint8_array(context, bytes, sizeof(bytes));
}
return JS_UNDEFINED;
}
uint8_t* tf_util_try_get_array_buffer(JSContext* context, size_t* psize, JSValueConst obj)
{
uint8_t* result = JS_GetArrayBuffer(context, psize, obj);
@ -434,6 +487,8 @@ void tf_util_register(JSContext* context)
JS_SetPropertyStr(context, global, "utf8Encode", JS_NewCFunction(context, _util_utf8_encode, "utf8Encode", 1));
JS_SetPropertyStr(context, global, "base64Decode", JS_NewCFunction(context, _util_base64_decode, "base64Decode", 1));
JS_SetPropertyStr(context, global, "base64Encode", JS_NewCFunction(context, _util_base64_encode, "base64Encode", 1));
JS_SetPropertyStr(context, global, "bip39Words", JS_NewCFunction(context, _util_bip39_words, "bip39Words", 1));
JS_SetPropertyStr(context, global, "bip39Bytes", JS_NewCFunction(context, _util_bip39_bytes, "bip39Bytes", 1));
JS_SetPropertyStr(context, global, "print", JS_NewCFunction(context, _util_print, "print", 1));
JS_SetPropertyStr(context, global, "setTimeout", JS_NewCFunction(context, _util_setTimeout, "setTimeout", 2));
JS_SetPropertyStr(context, global, "parseHttpRequest", JS_NewCFunction(context, _util_parseHttpRequest, "parseHttpRequest", 2));