From 85e7c09f260b258f372f93ac58407d75b02be49e Mon Sep 17 00:00:00 2001
From: Iván Ávalos <avalos@disroot.org>
Date: Fri, 30 Jun 2023 18:02:51 -0600
Subject: Add native QuickJS function for argon2id

---
 tart_module.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/tart_module.c b/tart_module.c
index 4dfa35a..01cd990 100644
--- a/tart_module.c
+++ b/tart_module.c
@@ -454,6 +454,75 @@ static JSValue js_talercrypto_hash(JSContext *ctx, JSValue this_val,
   return make_js_ta_copy(ctx, h, crypto_hash_BYTES);
 }
 
+static JSValue js_talercrypto_hash_argon2id(JSContext *ctx, JSValue this_val,
+                                            int argc, JSValueConst *argv)
+{
+    size_t pw_len;
+    size_t salt_len;
+    uint32_t iters;
+    uint32_t mem_size;
+    uint32_t hash_len;
+    uint8_t *pw;
+    uint8_t *salt;
+    uint8_t *hash = NULL;
+
+    JSValue ret_val;
+
+    // password: Uint8Array
+    pw = JS_GetArrayBuffer(ctx, &pw_len, argv[0]);
+    if (!pw) {
+        goto exception;
+    }
+
+    // salt: Uint8Array
+    salt = JS_GetArrayBuffer(ctx, &salt_len, argv[1]);
+    if (!salt) {
+        goto exception;
+    }
+    if (salt_len != crypto_pwhash_SALTBYTES) {
+        JS_ThrowTypeError(ctx, "invalid salt size");
+        goto exception;
+    }
+
+    // iterations: number
+    if (0 != JS_ToUint32(ctx, &iters, argv[2])) {
+        goto exception;
+    }
+
+    // memorySize: number (kibibytes)
+    if (0 != JS_ToUint32(ctx, &mem_size, argv[3])) {
+        goto exception;
+    }
+
+    // hashLength: number
+    if (0 != JS_ToUint32(ctx, &hash_len, argv[4])) {
+        goto exception;
+    }
+
+    hash = malloc(hash_len);
+
+    if (crypto_pwhash(hash,
+                      hash_len,
+                      (const char*) pw,
+                      pw_len,
+                      salt,
+                      iters,
+                      mem_size * 1024,
+                      crypto_pwhash_ALG_ARGON2ID13) != 0) {
+        JS_ThrowInternalError(ctx, "crypto_pwhash() call failed");
+        goto exception;
+    }
+    ret_val = make_js_ta_copy(ctx, hash, hash_len);
+ done:
+    if (NULL != hash) {
+        free(hash);
+    }
+    return ret_val;
+ exception:
+    ret_val = JS_EXCEPTION;
+    goto done;
+}
+
 static JSValue js_talercrypto_eddsa_key_get_public(JSContext *ctx, JSValue this_val,
                                                    int argc, JSValueConst *argv)
 {
@@ -1310,6 +1379,7 @@ static JSValue js_talercrypto_hash_state_finish(JSContext *ctx, JSValue this_val
 }
 
 
+
 static const JSCFunctionListEntry tart_talercrypto_funcs[] = {
     JS_CFUNC_DEF("structuredClone", 1, js_structured_clone),
     JS_CFUNC_DEF("encodeUtf8", 1, js_encode_utf8),
@@ -1321,6 +1391,7 @@ static const JSCFunctionListEntry tart_talercrypto_funcs[] = {
     JS_CFUNC_DEF("hashStateInit", 0, js_talercrypto_hash_state_init),
     JS_CFUNC_DEF("hashStateUpdate", 2, js_talercrypto_hash_state_update),
     JS_CFUNC_DEF("hashStateFinish", 1, js_talercrypto_hash_state_finish),
+    JS_CFUNC_DEF("hashArgon2id", 5, js_talercrypto_hash_argon2id),
     JS_CFUNC_DEF("eddsaGetPublic", 1, js_talercrypto_eddsa_key_get_public),
     JS_CFUNC_DEF("ecdheGetPublic", 1, js_talercrypto_ecdhe_key_get_public),
     JS_CFUNC_DEF("eddsaSign", 2, js_talercrypto_eddsa_sign),
-- 
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