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Fix GPGME >= 2.0.0 compatibility issue #2048

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Replace deprecated gpgme_key_get_string_attr with modern API

This commit fixes the build failure against GPGME >= 2.0.0 where
gpgme_key_get_string_attr and GPGME_ATTR_EMAIL were removed.

Changes made:
- Replaced direct call to gpgme_key_get_string_attr(key, GPGME_ATTR_EMAIL, NULL, 0)
- Added new helper function _gpgme_key_get_email() with backwards compatibility
- Function uses conditional compilation to support both old and new GPGME versions

Backwards Compatibility:
- GPGME < 2.0.0: Uses gpgme_key_get_string_attr() if GPGME_ATTR_EMAIL is available
- GPGME >= 2.0.0: Uses modern key->uids->email API

Forward Compatibility:
- Code compiles successfully with GPGME 2.0.0+ where deprecated functions are removed
- Uses modern GPGME API that iterates through key user IDs to find email addresses

Testing:
- Tested with GPGME 1.18.0 (backwards compatibility confirmed)
- Tested compilation compatibility for both old and new GPGME versions
- Verified the exact error from issue #2048 is resolved
- Confirmed no regression in functionality

Fixes: #2048
Resolves compilation error: 'gpgme_key_get_string_attr' undeclared
Resolves compilation error: 'GPGME_ATTR_EMAIL' undeclared
This commit is contained in:
Quaylyn Rimer
2025-07-22 20:27:43 -06:00
parent 359a086287
commit 606eaac31d
1 changed files with 36 additions and 1 deletions
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37
src/pgp/gpg.c
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@@ -76,6 +76,7 @@ static char* _add_header_footer(const char* const str, const char* const header,
static char* _gpgme_data_to_char(gpgme_data_t data);
static void _save_pubkeys(void);
static ProfPGPKey* _gpgme_key_to_ProfPGPKey(gpgme_key_t key);
static const char* _gpgme_key_get_email(gpgme_key_t key);
void
_p_gpg_free_pubkeyid(ProfPGPPubKeyId* pubkeyid)
@@ -656,7 +657,7 @@ p_gpg_decrypt(const char* const cipher)
error = gpgme_get_key(ctx, recipient->keyid, &key, 1);
if (!error && key) {
const char* addr = gpgme_key_get_string_attr(key, GPGME_ATTR_EMAIL, NULL, 0);
const char* addr = _gpgme_key_get_email(key);
if (addr) {
g_string_append(recipients_str, addr);
}
@@ -888,6 +889,40 @@ _gpgme_key_to_ProfPGPKey(gpgme_key_t key)
return p_pgpkey;
}
/**
* Extract the first email address from a gpgme_key_t object.
* This function provides backwards compatibility for both old and new GPGME versions.
* - GPGME < 2.0.0: Uses gpgme_key_get_string_attr (if available)
* - GPGME >= 2.0.0: Uses modern key->uids->email API
*
* @param key The gpgme_key_t object to extract email from.
* @return The first email address found in the key's user IDs, or NULL if none found.
* The returned string should not be freed as it points to internal gpgme memory.
*/
static const char*
_gpgme_key_get_email(gpgme_key_t key)
{
if (!key) {
return NULL;
}
#ifdef GPGME_ATTR_EMAIL
/* Use deprecated function if available (GPGME < 2.0.0) */
return gpgme_key_get_string_attr(key, GPGME_ATTR_EMAIL, NULL, 0);
#else
/* Use modern API for GPGME >= 2.0.0 */
gpgme_user_id_t uid = key->uids;
while (uid) {
if (uid->email && strlen(uid->email) > 0) {
return uid->email;
}
uid = uid->next;
}
return NULL;
#endif
}
/**
* Convert a gpgme_data_t object to a null-terminated char* string.
*