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60 lines
2.2 KiB
Diff
60 lines
2.2 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Kunal Malhotra <malhk@google.com>
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Date: Fri, 2 Jun 2023 23:32:02 +0000
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Subject: [PATCH] Fixing DatabaseUtils to detect malformed UTF-16 strings
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Test: tested with POC in bug, also using atest
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Bug: 224771621
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(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:fb4a72e3943d166088407e61aa4439ac349f3f12)
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Merged-In: Ide65205b83063801971c5778af3154bcf3f0e530
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Change-Id: Ide65205b83063801971c5778af3154bcf3f0e530
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---
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core/java/android/database/DatabaseUtils.java | 32 +++++++++++++------
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1 file changed, 23 insertions(+), 9 deletions(-)
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diff --git a/core/java/android/database/DatabaseUtils.java b/core/java/android/database/DatabaseUtils.java
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index 8cd3d7b5bc68..534adcd0a37f 100644
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--- a/core/java/android/database/DatabaseUtils.java
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+++ b/core/java/android/database/DatabaseUtils.java
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@@ -337,17 +337,31 @@ public class DatabaseUtils {
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*/
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public static void appendEscapedSQLString(StringBuilder sb, String sqlString) {
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sb.append('\'');
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- if (sqlString.indexOf('\'') != -1) {
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- int length = sqlString.length();
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- for (int i = 0; i < length; i++) {
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- char c = sqlString.charAt(i);
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- if (c == '\'') {
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- sb.append('\'');
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+ int length = sqlString.length();
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+ for (int i = 0; i < length; i++) {
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+ char c = sqlString.charAt(i);
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+ if (Character.isHighSurrogate(c)) {
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+ if (i == length - 1) {
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+ continue;
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+ }
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+ if (Character.isLowSurrogate(sqlString.charAt(i + 1))) {
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+ // add them both
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+ sb.append(c);
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+ sb.append(sqlString.charAt(i + 1));
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+ continue;
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+ } else {
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+ // this is a lone surrogate, skip it
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+ continue;
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}
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- sb.append(c);
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}
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- } else
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- sb.append(sqlString);
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+ if (Character.isLowSurrogate(c)) {
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+ continue;
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+ }
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+ if (c == '\'') {
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+ sb.append('\'');
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+ }
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+ sb.append(c);
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+ }
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sb.append('\'');
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}
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