For key searches only, gpg2 will fail to lookup any and all keys that
are not prefixed with 0x.

Signed-off-by: Dave Reisner <dreis...@archlinux.org>
---
 lib/libalpm/signing.c |   17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/lib/libalpm/signing.c b/lib/libalpm/signing.c
index 3ec957d..ef9f080 100644
--- a/lib/libalpm/signing.c
+++ b/lib/libalpm/signing.c
@@ -234,6 +234,8 @@ static int key_search(alpm_handle_t *handle, const char 
*fpr,
        gpgme_keylist_mode_t mode;
        gpgme_key_t key;
        int ret = -1;
+       size_t fpr_len;
+       char *full_fpr;
 
        memset(&ctx, 0, sizeof(ctx));
        err = gpgme_new(&ctx);
@@ -248,14 +250,21 @@ static int key_search(alpm_handle_t *handle, const char 
*fpr,
 
        _alpm_log(handle, ALPM_LOG_DEBUG, "looking up key %s remotely\n", fpr);
 
-       err = gpgme_get_key(ctx, fpr, &key, 0);
+       /* gpg2 goes full retard here. For key searches ONLY, we need to prefix 
the
+        * key fingerprint with 0x, or the lookup will fail. */
+       fpr_len = strlen(fpr);
+       MALLOC(full_fpr, fpr_len + 3, RET_ERR(handle, ALPM_ERR_MEMORY, -1));
+       sprintf(full_fpr, "0x%s", fpr);
+
+       err = gpgme_get_key(ctx, full_fpr, &key, 0);
+
        if(gpg_err_code(err) == GPG_ERR_EOF) {
                _alpm_log(handle, ALPM_LOG_DEBUG, "key lookup failed, unknown 
key\n");
                /* Try an alternate lookup using the 8 character fingerprint 
value, since
                 * busted-ass keyservers can't support lookups using subkeys 
with the full
                 * value as of now. This is why 2012 is not the year of PGP 
encryption. */
-               if(strlen(fpr) > 8) {
-                       const char *short_fpr = fpr + strlen(fpr) - 8;
+               if(fpr_len - 2 > 8) {
+                       const char *short_fpr = memcpy(&full_fpr[fpr_len - 8], 
"0x", 2);
                        _alpm_log(handle, ALPM_LOG_DEBUG,
                                        "looking up key %s remotely\n", 
short_fpr);
                        err = gpgme_get_key(ctx, short_fpr, &key, 0);
@@ -268,6 +277,8 @@ static int key_search(alpm_handle_t *handle, const char 
*fpr,
                }
        }
 
+       free(full_fpr);
+
        if(gpg_err_code(err) != GPG_ERR_NO_ERROR) {
                goto error;
        }
-- 
1.7.9.5


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