Added files.

2025-12-08 06:42:29 +02:00
commit a65a31fdac
109 changed files with 16539 additions and 0 deletions
--- a/internal/utf7/decoder_test.go
+++ b/internal/utf7/decoder_test.go
@@ -0,0 +1,115 @@
+package utf7_test
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/emersion/go-imap/v2/internal/utf7"
+)
+
+var decode = []struct {
+	in  string
+	out string
+	ok  bool
+}{
+	// Basics (the inverse test on encode checks other valid inputs)
+	{"", "", true},
+	{"abc", "abc", true},
+	{"&-abc", "&abc", true},
+	{"abc&-", "abc&", true},
+	{"a&-b&-c", "a&b&c", true},
+	{"&ABk-", "\x19", true},
+	{"&AB8-", "\x1F", true},
+	{"ABk-", "ABk-", true},
+	{"&-,&-&AP8-&-", "&,&\u00FF&", true},
+	{"&-&-,&AP8-&-", "&&,\u00FF&", true},
+	{"abc &- &AP8A,wD,- &- xyz", "abc & \u00FF\u00FF\u00FF & xyz", true},
+
+	// Illegal code point in ASCII
+	{"\x00", "", false},
+	{"\x1F", "", false},
+	{"abc\n", "", false},
+	{"abc\x7Fxyz", "", false},
+
+	// Invalid UTF-8
+	{"\xc3\x28", "", false},
+	{"\xe2\x82\x28", "", false},
+
+	// Invalid Base64 alphabet
+	{"&/+8-", "", false},
+	{"&*-", "", false},
+	{"&ZeVnLIqe -", "", false},
+
+	// CR and LF in Base64
+	{"&ZeVnLIqe\r\n-", "", false},
+	{"&ZeVnLIqe\r\n\r\n-", "", false},
+	{"&ZeVn\r\n\r\nLIqe-", "", false},
+
+	// Padding not stripped
+	{"&AAAAHw=-", "", false},
+	{"&AAAAHw==-", "", false},
+	{"&AAAAHwB,AIA=-", "", false},
+	{"&AAAAHwB,AIA==-", "", false},
+
+	// One byte short
+	{"&2A-", "", false},
+	{"&2ADc-", "", false},
+	{"&AAAAHwB,A-", "", false},
+	{"&AAAAHwB,A=-", "", false},
+	{"&AAAAHwB,A==-", "", false},
+	{"&AAAAHwB,A===-", "", false},
+	{"&AAAAHwB,AI-", "", false},
+	{"&AAAAHwB,AI=-", "", false},
+	{"&AAAAHwB,AI==-", "", false},
+
+	// Implicit shift
+	{"&", "", false},
+	{"&Jjo", "", false},
+	{"Jjo&", "", false},
+	{"&Jjo&", "", false},
+	{"&Jjo!", "", false},
+	{"&Jjo+", "", false},
+	{"abc&Jjo", "", false},
+
+	// Null shift
+	{"&AGE-&Jjo-", "", false},
+	{"&U,BTFw-&ZeVnLIqe-", "", false},
+
+	// Long input with Base64 at the end
+	{"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa &2D3eCg- &2D3eCw- &2D3eDg-",
+		"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa \U0001f60a \U0001f60b \U0001f60e", true},
+
+	// Long input in Base64 between short ASCII
+	{"00000000000000000000 &MEIwQjBCMEIwQjBCMEIwQjBCMEIwQjBCMEIwQjBCMEIwQjBCMEIwQjBCMEIwQjBCMEIwQjBCMEIwQjBCMEIwQjBCMEIwQjBCMEI- 00000000000000000000",
+		"00000000000000000000 " + strings.Repeat("\U00003042", 37) + " 00000000000000000000", true},
+
+	// ASCII in Base64
+	{"&AGE-", "", false},            // "a"
+	{"&ACY-", "", false},            // "&"
+	{"&AGgAZQBsAGwAbw-", "", false}, // "hello"
+	{"&JjoAIQ-", "", false},         // "\u263a!"
+
+	// Bad surrogate
+	{"&2AA-", "", false},    // U+D800
+	{"&2AD-", "", false},    // U+D800
+	{"&3AA-", "", false},    // U+DC00
+	{"&2AAAQQ-", "", false}, // U+D800 'A'
+	{"&2AD,,w-", "", false}, // U+D800 U+FFFF
+	{"&3ADYAA-", "", false}, // U+DC00 U+D800
+}
+
+func TestDecoder(t *testing.T) {
+	for _, test := range decode {
+		out, err := utf7.Decode(test.in)
+		if out != test.out {
+			t.Errorf("UTF7Decode(%+q) expected %+q; got %+q", test.in, test.out, out)
+		}
+		if test.ok {
+			if err != nil {
+				t.Errorf("UTF7Decode(%+q) unexpected error; %v", test.in, err)
+			}
+		} else if err == nil {
+			t.Errorf("UTF7Decode(%+q) expected error", test.in)
+		}
+	}
+}