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| author | Tobias Brunner <tobias@strongswan.org> | 2012-05-23 17:37:53 +0200 |
|---|---|---|
| committer | Tobias Brunner <tobias@strongswan.org> | 2012-05-23 17:50:05 +0200 |
| commit | a9cfd29c10c7a9c16167023c9470255eb1eecbb4 (patch) | |
| tree | 9bb0d80e48b702e48900bb9f0c882f12d6208ad1 | |
| parent | 31c83b973e2081c791b5ef1391913135660ca6b8 (diff) | |
| download | strongswan-a9cfd29c10c7a9c16167023c9470255eb1eecbb4.tar.bz2 strongswan-a9cfd29c10c7a9c16167023c9470255eb1eecbb4.tar.xz | |
Hash function for plugin features added.
| -rw-r--r-- | src/libstrongswan/plugins/plugin_feature.c | 53 | ||||
| -rw-r--r-- | src/libstrongswan/plugins/plugin_feature.h | 15 |
2 files changed, 68 insertions, 0 deletions
diff --git a/src/libstrongswan/plugins/plugin_feature.c b/src/libstrongswan/plugins/plugin_feature.c index 7239e512b..eed3a31b8 100644 --- a/src/libstrongswan/plugins/plugin_feature.c +++ b/src/libstrongswan/plugins/plugin_feature.c @@ -1,4 +1,7 @@ /* + * Copyright (C) 2012 Tobias Brunner + * Hochschule fuer Technik Rapperswil + * * Copyright (C) 2011 Martin Willi * Copyright (C) 2011 revosec AG * @@ -51,6 +54,56 @@ ENUM(plugin_feature_names, FEATURE_NONE, FEATURE_CUSTOM, /** * See header. */ +u_int32_t plugin_feature_hash(plugin_feature_t *feature) +{ + chunk_t data; + + switch (feature->type) + { + case FEATURE_NONE: + case FEATURE_RNG: + case FEATURE_NONCE_GEN: + case FEATURE_DATABASE: + case FEATURE_FETCHER: + /* put these special cases in their (type-specific) buckets */ + data = chunk_empty; + break; + case FEATURE_CRYPTER: + case FEATURE_AEAD: + case FEATURE_SIGNER: + case FEATURE_HASHER: + case FEATURE_PRF: + case FEATURE_DH: + case FEATURE_PRIVKEY: + case FEATURE_PRIVKEY_GEN: + case FEATURE_PUBKEY: + case FEATURE_PRIVKEY_SIGN: + case FEATURE_PUBKEY_VERIFY: + case FEATURE_PRIVKEY_DECRYPT: + case FEATURE_PUBKEY_ENCRYPT: + case FEATURE_CERT_DECODE: + case FEATURE_CERT_ENCODE: + case FEATURE_EAP_SERVER: + case FEATURE_EAP_PEER: + data = chunk_from_thing(feature->arg); + break; + case FEATURE_CUSTOM: + data = chunk_create(feature->arg.custom, + strlen(feature->arg.custom)); + break; + case FEATURE_XAUTH_SERVER: + case FEATURE_XAUTH_PEER: + data = chunk_create(feature->arg.xauth, + strlen(feature->arg.xauth)); + break; + } + return chunk_hash_inc(chunk_from_thing(feature->type), + chunk_hash(data)); +} + +/** + * See header. + */ bool plugin_feature_matches(plugin_feature_t *a, plugin_feature_t *b) { if (a->type == b->type) diff --git a/src/libstrongswan/plugins/plugin_feature.h b/src/libstrongswan/plugins/plugin_feature.h index 25a58a4b5..10a316e4a 100644 --- a/src/libstrongswan/plugins/plugin_feature.h +++ b/src/libstrongswan/plugins/plugin_feature.h @@ -1,4 +1,7 @@ /* + * Copyright (C) 2012 Tobias Brunner + * Hochschule fuer Technik Rapperswil + * * Copyright (C) 2011 Martin Willi * Copyright (C) 2011 revosec AG * @@ -304,6 +307,18 @@ struct plugin_feature_t { extern enum_name_t *plugin_feature_names; /** + * Calculates a hash value for the given feature. + * + * Since this is intended to be used with the plugin_features_matches function + * the hash is not really unique for all types of features (e.g. RNGs are all + * mapped to the same value because they are loosely matched by said function). + * + * @param feature feature to hash + * @return hash value of the feature + */ +u_int32_t plugin_feature_hash(plugin_feature_t *feature); + +/** * Check if feature a matches to feature b. * * @param a feature to check |