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crypto: make crypto ctx initialization an array

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Make it trivial to add handlers for new protocols without duplicating
code. No functional changes.
This commit is contained in:
Jani Nikula 2015-12-14 09:38:51 -04:00 committed by David Bremner
parent 4419069472
commit cb494f72f3
1 changed files with 21 additions and 6 deletions
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27
crypto.c
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@ -43,12 +43,27 @@ create_gpg_context (notmuch_crypto_t *crypto)
return gpgctx;
}
static const struct {
const char *protocol;
notmuch_crypto_context_t *(*get_context) (notmuch_crypto_t *crypto);
} protocols[] = {
{
.protocol = "application/pgp-signature",
.get_context = create_gpg_context,
},
{
.protocol = "application/pgp-encrypted",
.get_context = create_gpg_context,
},
};
/* for the specified protocol return the context pointer (initializing
* if needed) */
notmuch_crypto_context_t *
notmuch_crypto_get_context (notmuch_crypto_t *crypto, const char *protocol)
{
notmuch_crypto_context_t *cryptoctx = NULL;
size_t i;
if (! protocol) {
fprintf (stderr, "Cryptographic protocol is empty.\n");
@ -61,14 +76,14 @@ notmuch_crypto_get_context (notmuch_crypto_t *crypto, const char *protocol)
* parameter names as defined in this document are
* case-insensitive." Thus, we use strcasecmp for the protocol.
*/
if (strcasecmp (protocol, "application/pgp-signature") == 0 ||
strcasecmp (protocol, "application/pgp-encrypted") == 0) {
cryptoctx = create_gpg_context (crypto);
} else {
fprintf (stderr, "Unknown or unsupported cryptographic protocol.\n");
for (i = 0; i < ARRAY_SIZE (protocols); i++) {
if (strcasecmp (protocol, protocols[i].protocol) == 0)
return protocols[i].get_context (crypto);
}
return cryptoctx;
fprintf (stderr, "Unknown or unsupported cryptographic protocol.\n");
return NULL;
}
int