OpenSSL: Add support for HMAC functions with 0.9.8 and older

Commit d9cc4646eb added
crypto_hash_{init,update,finish}() wrappers for OpenSSL, but it
assumed the current HMAC API in OpenSSL. This was changed in 0.9.9
to return error codes from the functions while older versions used
void functions. Add support for the older versions, too.

Signed-hostap: Jouni Malinen <j@w1.fi>

src/crypto/crypto_openssl.c

@@ -572,10 +572,14 @@ struct crypto_hash * crypto_hash_init(enum crypto_hash_alg alg, const u8 *key,
 	if (ctx == NULL)
 		return NULL;
 
+#if OPENSSL_VERSION_NUMBER < 0x00909000
+	HMAC_Init_ex(&ctx->ctx, key, key_len, md, NULL);
+#else /* openssl < 0.9.9 */
 	if (HMAC_Init_ex(&ctx->ctx, key, key_len, md, NULL) != 1) {
 		os_free(ctx);
 		return NULL;
 	}
+#endif /* openssl < 0.9.9 */
 
 	return ctx;
 }
@@ -603,7 +607,12 @@ int crypto_hash_finish(struct crypto_hash *ctx, u8 *mac, size_t *len)
 	}
 
 	mdlen = *len;
+#if OPENSSL_VERSION_NUMBER < 0x00909000
+	HMAC_Final(&ctx->ctx, mac, &mdlen);
+	res = 1;
+#else /* openssl < 0.9.9 */
 	res = HMAC_Final(&ctx->ctx, mac, &mdlen);
+#endif /* openssl < 0.9.9 */
 	HMAC_CTX_cleanup(&ctx->ctx);
 	os_free(ctx);