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Add test for S/MIME signed multipart message with attachments
This test ensures correct handling of S/MIME signed messages containing plain text, HTML alternatives, embedded files, and attachments. It validates the message structure and content, covering scenarios with comprehensive MIME types and signing mechanisms.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -6107,6 +6107,86 @@ func TestMsg_WriteTo(t *testing.T) { | |
| } | ||
| checkMessageContent(t, buffer, wants) | ||
| }) | ||
| t.Run("WriteTo Multipart plain body, alternative html, attachment, embed and S/MIME signed", func(t *testing.T) { | ||
| message := testMessage(t) | ||
| message.AddAlternativeString(TypeTextHTML, "<p>HTML alternative part</p>") | ||
| message.AttachFile("testdata/attachment.txt") | ||
| message.EmbedFile("testdata/embed.txt") | ||
| keypair, err := getDummyKeyPairTLS() | ||
| if err != nil { | ||
| t.Fatalf("failed to load dummy key material: %s", err) | ||
| } | ||
| if err = message.SignWithTLSCertificate(keypair); err != nil { | ||
| t.Fatalf("failed to initialize S/MIME signing: %s", err) | ||
| } | ||
| buffer := bytes.NewBuffer(nil) | ||
| if _, err := message.WriteTo(buffer); err != nil { | ||
| t.Fatalf("failed to write message to buffer: %s", err) | ||
| } | ||
| wants := []msgContentTest{ | ||
| {0, "Date:", false, true, false}, | ||
| {1, "MIME-Version: 1.0", true, true, false}, | ||
| {2, "Message-ID: <", false, true, false}, | ||
| {2, ">", false, false, true}, | ||
| {6, "From: <[email protected]>", true, true, false}, | ||
| {7, "To: <[email protected]>", true, true, false}, | ||
| {8, `Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256;`, true, | ||
| true, false}, | ||
| {9, ` boundary=`, false, true, false}, | ||
| {10, "", true, false, false}, | ||
| {11, "--", false, true, false}, | ||
| {12, `Content-Type: multipart/mixed;`, true, true, false}, | ||
| {13, ` boundary=`, false, true, false}, | ||
| {14, "", true, false, false}, | ||
| {15, "--", false, true, false}, | ||
| {16, `Content-Type: multipart/related;`, true, true, false}, | ||
| {17, ` boundary=`, false, true, false}, | ||
| {18, "", true, false, false}, | ||
| {19, "--", false, true, false}, | ||
| {20, `Content-Type: multipart/alternative;`, true, true, false}, | ||
| {21, ` boundary=`, false, true, false}, | ||
| {22, "", true, false, false}, | ||
| {23, "--", false, true, false}, | ||
| {24, "Content-Transfer-Encoding: quoted-printable", true, true, false}, | ||
| {25, "Content-Type: text/plain; charset=UTF-8", true, true, false}, | ||
| {26, "", true, false, false}, | ||
| {27, "Testmail", true, true, false}, | ||
| {28, "--", false, true, false}, | ||
| {29, "Content-Transfer-Encoding: quoted-printable", true, true, false}, | ||
| {30, "Content-Type: text/html; charset=UTF-8", true, true, false}, | ||
| {31, "", true, false, false}, | ||
| {32, `<p>HTML alternative part</p>`, true, true, false}, | ||
| {33, "--", false, true, true}, | ||
| {34, "", true, false, false}, | ||
| {35, "--", false, true, false}, | ||
| {36, `Content-Disposition: inline; filename="embed.txt"`, true, true, false}, | ||
| {37, "Content-Id: <embed.txt>", true, true, false}, | ||
| {38, "Content-Transfer-Encoding: base64", true, true, false}, | ||
| {39, `Content-Type: text/plain; charset=utf-8; name="embed.txt"`, true, true, false}, | ||
| {40, "", true, false, false}, | ||
| {41, "VGhp", false, true, false}, | ||
| {42, "", true, false, false}, | ||
| {43, "--", false, true, true}, | ||
| {44, "", true, false, false}, | ||
| {45, "--", false, true, false}, | ||
| {46, `Content-Disposition: attachment; filename="attachment.txt"`, true, true, false}, | ||
| {47, "Content-Transfer-Encoding: base64", true, true, false}, | ||
| {48, `Content-Type: text/plain; charset=utf-8; name="attachment.txt"`, true, true, false}, | ||
| {49, "", true, false, false}, | ||
| {50, "VGhp", false, true, false}, | ||
| {51, "", true, false, false}, | ||
| {52, "--", false, true, true}, | ||
| {53, "", true, false, false}, | ||
| {54, "--", false, true, false}, | ||
| {55, "Content-Transfer-Encoding: base64", true, true, false}, | ||
| {56, `Content-Type: application/pkcs7-signature; name="smime.p7s"`, true, true, false}, | ||
| {57, "", true, false, false}, | ||
| {58, "MII", false, true, false}, | ||
| {121, "", true, false, false}, | ||
| {122, "--", false, true, true}, | ||
| } | ||
| checkMessageContent(t, buffer, wants) | ||
| }) | ||
| } | ||
|
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||
| func TestMsg_WriteToFile(t *testing.T) { | ||
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