Bug #80870 [Opn->Fbk]: base64_decode: Concatenated base64 blocks are corrupted

Edit report at https://bugs.php.net/bug.php?id=80870&edit=1 ID: 80870 Updated by: requinix@php.net Reported by: bugs at jth dot net Summary: base64_decode: Concatenated base64 blocks are corrupted -Status: Open +Status: Feedback Type: Bug -Package: Unknown/Other Function +Package: Strings related Operating System: Linux PHP Version: 7.4.16 Block user comment: N Private report: N New Comment: = is not valid for Base64 when located in the middle of an input string. As such it will be ignored (since $strict is not being used) and PHP will attempt to decode "TGluZSBuciAxIGJjZGVmZwoTGluZSBuciAyIAo=". The line feed is irrelevant. What is this "may occur as input from an email"? Previous Comments: ------------------------------------------------------------------------ [2021-03-15 20:28:36] bugs at jth dot net Description: ------------ When decoding a string containing two or more base64 blocks with line feeds in the base64 text the latter blocks are corrupted. This may occur as input from an email generated by some mail programs. Test script: --------------- $s1 = base64_encode("Line nr 1 bcdefg\n"); $s2 = base64_encode("Line nr 2 \n"); $str = $s1."\n".$s2; echo $str echo base64_decode($str); Expected result: ---------------- TGluZSBuciAxIGJjZGVmZwo= TGluZSBuciAyIAo= Line nr 1 bcdefg Line nr 2 Actual result: -------------- Result: TGluZSBuciAxIGJjZGVmZwo= TGluZSBuciAyIAo= Line nr 1 bcdefg (corrupted text) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=80870&edit=1