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Simon Ser 32fdcd7ca5 mime/quotedprintable: accept LWSP-char after =
SP and HTAB are allowed after a = before the following CRLF.

RFC 2045 section 6.7 describes the ABNF for the quoted-printable encoding:

    qp-line := *(qp-segment transport-padding CRLF)
               qp-part transport-padding
    qp-segment := qp-section *(SPACE / TAB) "="
    transport-padding := *LWSP-char
                          ; Composers MUST NOT generate
                          ; non-zero length transport
                          ; padding, but receivers MUST
                          ; be able to handle padding
                          ; added by message transports.

RFC 822 defines LWSP-char as:

    LWSP-char   =  SPACE / HTAB

Dovecot's imaptest contains such a message in
src/tests/fetch-binary-mime-qp.mbox.

Fixes #70952

Change-Id: Ie05921088d7e4d6c92c4bf79b0f4a13586230753
GitHub-Last-Rev: e6e6eee8eb
GitHub-Pull-Request: golang/go#70951
Reviewed-on: https://go-review.googlesource.com/c/go/+/638276
Reviewed-by: Sean Liao <sean@liao.dev>
Reviewed-by: Damien Neil <dneil@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Auto-Submit: Sean Liao <sean@liao.dev>
2025-03-04 05:00:10 -08:00
.github .github: update language change proposal template 2024-08-08 19:02:29 +00:00
api go/parser: deprecate parser.ParseDir 2025-02-19 11:49:13 -08:00
doc crypto/tls: require EMS in FIPS 140-3 mode 2025-02-25 11:50:05 -08:00
lib lib/time: build with Ubuntu backward compatibility options 2025-02-06 17:10:15 -08:00
misc misc/wasm: move wasm runtime files to lib/wasm 2024-08-30 19:15:21 +00:00
src mime/quotedprintable: accept LWSP-char after = 2025-03-04 05:00:10 -08:00
test cmd/compile: fix out of memory when inlining closure 2025-03-04 03:10:17 -08:00
.gitattributes
.gitignore runtime,internal: move runtime/internal/sys to internal/runtime/sys 2024-07-23 19:05:35 +00:00
CONTRIBUTING.md doc: normalize proposal-process links 2023-03-29 22:00:27 +00:00
LICENSE LICENSE: update per Google Legal 2024-08-09 14:54:31 +00:00
PATENTS
README.md README: fix CC BY license name 2024-07-22 17:45:27 +00:00
SECURITY.md SECURITY.md: update the Reporting a Vulnerability link 2023-09-22 21:17:24 +00:00
codereview.cfg
go.env cmd/go: additional doc-inspired tests and bug fixes 2023-06-06 19:18:46 +00:00

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The Go Programming Language

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