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Limit base64-encoded data to 76 chars per line 

excluding CRLF
This commit is contained in:
anon 2024-04-18 23:08:19 +02:00
parent 020dc221c8
commit dc2821ceab
1 changed files with 16 additions and 2 deletions
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18
email.d
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@ -8,6 +8,7 @@ pragma(lib, "curl");
import std.base64;
import std.string;
import std.range;
import arsd.characterencodings;
@ -211,7 +212,7 @@ class EmailMessage {
auto mimeAttachment = new MimeContainer(attachment.type ~ "; name=\""~attachment.filename~"\"");
mimeAttachment.headers ~= "Content-Transfer-Encoding: base64";
mimeAttachment.headers ~= "Content-ID: <" ~ attachment.id ~ ">";
mimeAttachment.content = Base64.encode(cast(const(ubyte)[]) attachment.content);
mimeAttachment.content = encodeBase64Mime(cast(const(ubyte)[]) attachment.content);
mimeRelated.stuff ~= mimeAttachment;
}
@ -233,7 +234,7 @@ class EmailMessage {
if(attachment.id.length)
mimeAttachment.headers ~= "Content-ID: <" ~ attachment.id ~ ">";
mimeAttachment.content = Base64.encode(cast(const(ubyte)[]) attachment.content);
mimeAttachment.content = encodeBase64Mime(cast(const(ubyte)[]) attachment.content);
mimeMixed.stuff ~= mimeAttachment;
}
@ -1152,6 +1153,19 @@ immutable(ubyte)[] decodeQuotedPrintable(string text) {
return ret;
}
/// Base64 range encoder UFCS helper.
alias base64encode = Base64.encoder;
/// Base64 encoded data with line length of 76 as mandated by RFC 2045 Section 6.8
string encodeBase64Mime(const(ubyte[]) content, string LINESEP = "\r\n") {
enum LINE_LENGTH = 76;
/// Only 6 bit of every byte are used; log2(64) = 6
enum int SOURCE_CHUNK_LENGTH = LINE_LENGTH * 6/8;
return cast(immutable(char[]))content.chunks(SOURCE_CHUNK_LENGTH).base64encode.join(LINESEP);
}
/+
void main() {
import std.file;