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base64:To improve compatibility, there may not be enough equal signs (#1561)

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This commit is contained in:
liaodaiguo123
2022-03-31 18:57:03 +08:00
committed by GitHub
parent bee8a0e731
commit f72573a2aa
1 changed files with 5 additions and 3 deletions
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8
lualib-src/lua-crypt.c
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@@ -961,10 +961,12 @@ lb64decode(lua_State *L) {
int padding = 0; int padding = 0;
int c[4]; int c[4];
for (j=0;j<4;) { for (j=0;j<4;) {
if (i>=sz) { if (i>=sz && 4>j){
return luaL_error(L, "Invalid base64 text"); /*To improve compatibility, there may not be enough equal signs */
c[j] = -2;
}else{
c[j] = b64index(text[i]);
} }
c[j] = b64index(text[i]);
if (c[j] == -1) { if (c[j] == -1) {
++i; ++i;
continue; continue;