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136 lines
5.3 KiB
136 lines
5.3 KiB
diff --git a/openpgp/read.go b/openpgp/read.go
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index a6cecc5..0c9397b 100644
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--- a/openpgp/read.go
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+++ b/openpgp/read.go
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@@ -56,8 +56,9 @@ type MessageDetails struct {
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// been consumed. Once EOF has been seen, the following fields are
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// valid. (An authentication code failure is reported as a
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// SignatureError error when reading from UnverifiedBody.)
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- SignatureError error // nil if the signature is good.
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- Signature *packet.Signature // the signature packet itself.
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+ SignatureError error // nil if the signature is good.
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+ Signature *packet.Signature // the signature packet itself, if v4 (default)
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+ SignatureV3 *packet.SignatureV3 // the signature packet if it is a v2 or v3 signature
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decrypted io.ReadCloser
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}
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@@ -334,13 +335,15 @@ func (scr *signatureCheckReader) Read(buf []byte) (n int, err error) {
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}
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var ok bool
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- if scr.md.Signature, ok = p.(*packet.Signature); !ok {
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+ if scr.md.Signature, ok = p.(*packet.Signature); ok {
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+ scr.md.SignatureError = scr.md.SignedBy.PublicKey.VerifySignature(scr.h, scr.md.Signature)
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+ } else if scr.md.SignatureV3, ok = p.(*packet.SignatureV3); ok {
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+ scr.md.SignatureError = scr.md.SignedBy.PublicKey.VerifySignatureV3(scr.h, scr.md.SignatureV3)
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+ } else {
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scr.md.SignatureError = errors.StructuralError("LiteralData not followed by Signature")
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return
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}
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- scr.md.SignatureError = scr.md.SignedBy.PublicKey.VerifySignature(scr.h, scr.md.Signature)
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-
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// The SymmetricallyEncrypted packet, if any, might have an
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// unsigned hash of its own. In order to check this we need to
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// close that Reader.
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diff --git a/openpgp/read_test.go b/openpgp/read_test.go
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index 52f942c..abe8d7b 100644
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--- a/openpgp/read_test.go
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+++ b/openpgp/read_test.go
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@@ -13,6 +13,7 @@ import (
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"strings"
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"testing"
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+ "golang.org/x/crypto/openpgp/armor"
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"golang.org/x/crypto/openpgp/errors"
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)
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@@ -411,6 +412,50 @@ func TestIssue11504(t *testing.T) {
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testReadMessageError(t, "9303000130303030303030303030983002303030303030030000000130")
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}
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+// TestSignatureV3Message tests the verification of V3 signature, generated
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+// with a modern V4-style key. Some people have their clients set to generate
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+// V3 signatures, so it's useful to be able to verify them.
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+func TestSignatureV3Message(t *testing.T) {
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+ sig, err := armor.Decode(strings.NewReader(signedMessageV3))
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+ if err != nil {
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+ t.Error(err)
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+ return
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+ }
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+ key, err := ReadArmoredKeyRing(strings.NewReader(keyV4forVerifyingSignedMessageV3))
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+ if err != nil {
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+ t.Error(err)
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+ return
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+ }
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+ md, err := ReadMessage(sig.Body, key, nil, nil)
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+ if err != nil {
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+ t.Error(err)
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+ return
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+ }
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+
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+ _, err = ioutil.ReadAll(md.UnverifiedBody)
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+ if err != nil {
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+ t.Error(err)
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+ return
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+ }
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+
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+ // We'll see a sig error here after reading in the UnverifiedBody above,
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+ // if there was one to see.
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+ if err = md.SignatureError; err != nil {
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+ t.Error(err)
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+ return
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+ }
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+
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+ if md.SignatureV3 == nil {
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+ t.Errorf("No available signature after checking signature")
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+ return
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+ }
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+ if md.Signature != nil {
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+ t.Errorf("Did not expect a signature V4 back")
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+ return
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+ }
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+ return
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+}
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+
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const testKey1KeyId = 0xA34D7E18C20C31BB
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const testKey3KeyId = 0x338934250CCC0360
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@@ -504,3 +549,36 @@ const unknownHashFunctionHex = `8a00000040040001990006050253863c24000a09103b4fe6
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const missingHashFunctionHex = `8a00000040040001030006050253863c24000a09103b4fe6acc0b21f32ffff0101010101010101010101010101010101010101010101010101010101010101010101010101`
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const campbellQuine = `a0b001000300fcffa0b001000d00f2ff000300fcffa0b001000d00f2ff8270a01c00000500faff8270a01c00000500faff000500faff001400ebff8270a01c00000500faff000500faff001400ebff428821c400001400ebff428821c400001400ebff428821c400001400ebff428821c400001400ebff428821c400000000ffff000000ffff000b00f4ff428821c400000000ffff000000ffff000b00f4ff0233214c40000100feff000233214c40000100feff0000`
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+
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+const keyV4forVerifyingSignedMessageV3 = `-----BEGIN PGP PUBLIC KEY BLOCK-----
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+Comment: GPGTools - https://gpgtools.org
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+
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+mI0EVfxoFQEEAMBIqmbDfYygcvP6Phr1wr1XI41IF7Qixqybs/foBF8qqblD9gIY
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+BKpXjnBOtbkcVOJ0nljd3/sQIfH4E0vQwK5/4YRQSI59eKOqd6Fx+fWQOLG+uu6z
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+tewpeCj9LLHvibx/Sc7VWRnrznia6ftrXxJ/wHMezSab3tnGC0YPVdGNABEBAAG0
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+JEdvY3J5cHRvIFRlc3QgS2V5IDx0aGVtYXhAZ21haWwuY29tPoi5BBMBCgAjBQJV
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+/GgVAhsDBwsJCAcDAgEGFQgCCQoLBBYCAwECHgECF4AACgkQeXnQmhdGW9PFVAP+
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+K7TU0qX5ArvIONIxh/WAweyOk884c5cE8f+3NOPOOCRGyVy0FId5A7MmD5GOQh4H
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+JseOZVEVCqlmngEvtHZb3U1VYtVGE5WZ+6rQhGsMcWP5qaT4soYwMBlSYxgYwQcx
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+YhN9qOr292f9j2Y//TTIJmZT4Oa+lMxhWdqTfX+qMgG4jQRV/GgVAQQArhFSiij1
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+b+hT3dnapbEU+23Z1yTu1DfF6zsxQ4XQWEV3eR8v+8mEDDNcz8oyyF56k6UQ3rXi
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+UMTIwRDg4V6SbZmaFbZYCOwp/EmXJ3rfhm7z7yzXj2OFN22luuqbyVhuL7LRdB0M
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+pxgmjXb4tTvfgKd26x34S+QqUJ7W6uprY4sAEQEAAYifBBgBCgAJBQJV/GgVAhsM
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+AAoJEHl50JoXRlvT7y8D/02ckx4OMkKBZo7viyrBw0MLG92i+DC2bs35PooHR6zz
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+786mitjOp5z2QWNLBvxC70S0qVfCIz8jKupO1J6rq6Z8CcbLF3qjm6h1omUBf8Nd
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+EfXKD2/2HV6zMKVknnKzIEzauh+eCKS2CeJUSSSryap/QLVAjRnckaES/OsEWhNB
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+=RZia
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+-----END PGP PUBLIC KEY BLOCK-----
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+`
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+
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+const signedMessageV3 = `-----BEGIN PGP MESSAGE-----
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+Comment: GPGTools - https://gpgtools.org
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+
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+owGbwMvMwMVYWXlhlrhb9GXG03JJDKF/MtxDMjKLFYAoUaEktbhEITe1uDgxPVWP
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+q5NhKjMrWAVcC9evD8z/bF/uWNjqtk/X3y5/38XGRQHm/57rrDRYuGnTw597Xqka
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+uM3137/hH3Os+Jf2dc0fXOITKwJvXJvecPVs0ta+Vg7ZO1MLn8w58Xx+6L58mbka
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+DGHyU9yTueZE8D+QF/Tz28Y78dqtF56R1VPn9Xw4uJqrWYdd7b3vIZ1V6R4Nh05d
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+iT57d/OhWwA=
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+=hG7R
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+-----END PGP MESSAGE-----
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+`
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