As we prepare to handle S/MIME-encrypted PKCS#7 EnvelopedData (which
is not multipart), we don't want to be limited to passing only
GMimeMultipartEncrypted MIME parts to _notmuch_crypto_decrypt.

There is no functional change here, just a matter of adjusting how we
pass arguments internally.

Signed-off-by: Daniel Kahn Gillmor <d...@fifthhorseman.net>
---
 lib/index.cc  | 8 ++++----
 mime-node.c   | 3 +--
 util/crypto.c | 6 +++---
 util/crypto.h | 2 +-
 4 files changed, 9 insertions(+), 10 deletions(-)

diff --git a/lib/index.cc b/lib/index.cc
index f029b334..da9a3abe 100644
--- a/lib/index.cc
+++ b/lib/index.cc
@@ -369,7 +369,7 @@ _index_content_type (notmuch_message_t *message, 
GMimeObject *part)
 
 static void
 _index_encrypted_mime_part (notmuch_message_t *message, notmuch_indexopts_t 
*indexopts,
-                           GMimeMultipartEncrypted *part,
+                           GMimeObject *part,
                            _notmuch_message_crypto_t *msg_crypto);
 
 static void
@@ -439,7 +439,7 @@ _index_mime_part (notmuch_message_t *message,
                                     g_mime_multipart_get_part (multipart, i));
                if (i == GMIME_MULTIPART_ENCRYPTED_CONTENT) {
                    _index_encrypted_mime_part (message, indexopts,
-                                               GMIME_MULTIPART_ENCRYPTED 
(part),
+                                               part,
                                                msg_crypto);
                } else {
                    if (i != GMIME_MULTIPART_ENCRYPTED_VERSION) {
@@ -551,7 +551,7 @@ _index_mime_part (notmuch_message_t *message,
 static void
 _index_encrypted_mime_part (notmuch_message_t *message,
                            notmuch_indexopts_t *indexopts,
-                           GMimeMultipartEncrypted *encrypted_data,
+                           GMimeObject *encrypted_data,
                            _notmuch_message_crypto_t *msg_crypto)
 {
     notmuch_status_t status;
@@ -603,7 +603,7 @@ _index_encrypted_mime_part (notmuch_message_t *message,
        g_object_unref (decrypt_result);
     }
     GMimeObject *toindex = clear;
-    if (_notmuch_message_crypto_potential_payload (msg_crypto, clear, 
GMIME_OBJECT (encrypted_data), GMIME_MULTIPART_ENCRYPTED_CONTENT) &&
+    if (_notmuch_message_crypto_potential_payload (msg_crypto, clear, 
encrypted_data, GMIME_MULTIPART_ENCRYPTED_CONTENT) &&
        msg_crypto->decryption_status == NOTMUCH_MESSAGE_DECRYPTED_FULL) {
        toindex = _notmuch_repair_crypto_payload_skip_legacy_display (clear);
        if (toindex != clear)
diff --git a/mime-node.c b/mime-node.c
index b6431e3b..c2ee858d 100644
--- a/mime-node.c
+++ b/mime-node.c
@@ -253,7 +253,6 @@ node_decrypt_and_verify (mime_node_t *node, GMimeObject 
*part)
     GError *err = NULL;
     GMimeDecryptResult *decrypt_result = NULL;
     notmuch_status_t status;
-    GMimeMultipartEncrypted *encrypteddata = GMIME_MULTIPART_ENCRYPTED (part);
     notmuch_message_t *message = NULL;
 
     if (! node->unwrapped_child) {
@@ -266,7 +265,7 @@ node_decrypt_and_verify (mime_node_t *node, GMimeObject 
*part)
        node->unwrapped_child = _notmuch_crypto_decrypt 
(&node->decrypt_attempted,
                                                         
node->ctx->crypto->decrypt,
                                                         message,
-                                                        encrypteddata, 
&decrypt_result, &err);
+                                                        part, &decrypt_result, 
&err);
        if (node->unwrapped_child)
            set_unwrapped_child_destructor (node);
     }
diff --git a/util/crypto.c b/util/crypto.c
index 0bb6f526..fbd5f011 100644
--- a/util/crypto.c
+++ b/util/crypto.c
@@ -34,7 +34,7 @@ GMimeObject *
 _notmuch_crypto_decrypt (bool *attempted,
                         notmuch_decryption_policy_t decrypt,
                         notmuch_message_t *message,
-                        GMimeMultipartEncrypted *part,
+                        GMimeObject *part,
                         GMimeDecryptResult **decrypt_result,
                         GError **err)
 {
@@ -55,7 +55,7 @@ _notmuch_crypto_decrypt (bool *attempted,
            }
            if (attempted)
                *attempted = true;
-           ret = g_mime_multipart_encrypted_decrypt (part,
+           ret = g_mime_multipart_encrypted_decrypt (GMIME_MULTIPART_ENCRYPTED 
(part),
                                                      GMIME_DECRYPT_NONE,
                                                      
notmuch_message_properties_value (list),
                                                      decrypt_result, err);
@@ -81,7 +81,7 @@ _notmuch_crypto_decrypt (bool *attempted,
     GMimeDecryptFlags flags = GMIME_DECRYPT_NONE;
     if (decrypt == NOTMUCH_DECRYPT_TRUE && decrypt_result)
        flags |= GMIME_DECRYPT_EXPORT_SESSION_KEY;
-    ret = g_mime_multipart_encrypted_decrypt (part, flags, NULL,
+    ret = g_mime_multipart_encrypted_decrypt (GMIME_MULTIPART_ENCRYPTED 
(part), flags, NULL,
                                              decrypt_result, err);
     return ret;
 }
diff --git a/util/crypto.h b/util/crypto.h
index f8bda0d1..4fa5599c 100644
--- a/util/crypto.h
+++ b/util/crypto.h
@@ -18,7 +18,7 @@ GMimeObject *
 _notmuch_crypto_decrypt (bool *attempted,
                         notmuch_decryption_policy_t decrypt,
                         notmuch_message_t *message,
-                        GMimeMultipartEncrypted *part,
+                        GMimeObject *part,
                         GMimeDecryptResult **decrypt_result,
                         GError **err);
 
-- 
2.26.2

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