openssl: Make sure to release the functional ENGINE reference
The functional reference created by ENGINE_init() was never released, only the structural one created by ENGINE_by_id(). The functional reference includes an implicit structural reference, which is also released by ENGINE_finish(). Closes strongswan/strongswan#119.
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@@ -436,21 +436,21 @@ static private_key_t *openssl_private_key_connect(key_type_t type,
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ENGINE_free(engine);
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return NULL;
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}
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ENGINE_free(engine);
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if (!login(engine, keyid))
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{
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DBG1(DBG_LIB, "login to engine '%s' failed", engine_id);
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ENGINE_free(engine);
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ENGINE_finish(engine);
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return NULL;
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}
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key = ENGINE_load_private_key(engine, keyname, NULL, NULL);
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ENGINE_finish(engine);
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if (!key)
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{
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DBG1(DBG_LIB, "failed to load private key with ID '%s' from "
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"engine '%s'", keyname, engine_id);
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ENGINE_free(engine);
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return NULL;
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}
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ENGINE_free(engine);
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switch (EVP_PKEY_base_id(key))
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{
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