add otp

crypto/otp/build.info

@@ -0,0 +1,2 @@
+LIBS=../../libcrypto
+SOURCE[../../libcrypto]=otp_err.c otp_lib.c

crypto/otp/otp_err.c

@@ -0,0 +1,44 @@
+/*
+ * Generated by util/mkerr.pl DO NOT EDIT
+ * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include <openssl/err.h>
+#include <openssl/otp.h>
+
+/* BEGIN ERROR CODES */
+#ifndef OPENSSL_NO_ERR
+
+# define ERR_FUNC(func) ERR_PACK(ERR_LIB_OTP,func,0)
+# define ERR_REASON(reason) ERR_PACK(ERR_LIB_OTP,0,reason)
+
+static ERR_STRING_DATA OTP_str_functs[] = {
+    {ERR_FUNC(OTP_F_OTP_GENERATE), "OTP_generate"},
+    {0, NULL}
+};
+
+static ERR_STRING_DATA OTP_str_reasons[] = {
+    {ERR_REASON(OTP_R_CMAC_FAILURE), "cmac failure"},
+    {ERR_REASON(OTP_R_INVALID_PARAMS), "invalid params"},
+    {0, NULL}
+};
+
+#endif
+
+int ERR_load_OTP_strings(void)
+{
+#ifndef OPENSSL_NO_ERR
+
+    if (ERR_func_error_string(OTP_str_functs[0].error) == NULL) {
+        ERR_load_strings(0, OTP_str_functs);
+        ERR_load_strings(0, OTP_str_reasons);
+    }
+#endif
+    return 1;
+}

crypto/otp/otp_lib.c

@@ -0,0 +1,187 @@
+/* ====================================================================
+ * Copyright (c) 2015 - 2016 The GmSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the GmSSL Project.
+ *    (http://gmssl.org/)"
+ *
+ * 4. The name "GmSSL Project" must not be used to endorse or promote
+ *    products derived from this software without prior written
+ *    permission. For written permission, please contact
+ *    guanzhi1980@gmail.com.
+ *
+ * 5. Products derived from this software may not be called "GmSSL"
+ *    nor may "GmSSL" appear in their names without prior written
+ *    permission of the GmSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the GmSSL Project
+ *    (http://gmssl.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE GmSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE GmSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ */
+
+#include <time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <openssl/evp.h>
+#include <openssl/err.h>
+#include <openssl/crypto.h>
+#include <openssl/cmac.h>
+#include <openssl/kdf2.h>
+#include <openssl/otp.h>
+#include "../modes/modes_lcl.h"
+
+static int pow_table[] = {
+	1,
+	10,
+	100,
+	1000,
+	10000,
+	100000,
+	1000000,
+	10000000,
+	100000000,
+};
+
+static int check_params(const OTP_PARAMS *params)
+{
+	if ((params->te < 1 || params->te > 60) ||
+		(params->type != NID_sm3 && params->type != NID_sms4_ecb) || /* about to change */
+		(params->otp_digits >= sizeof(pow_table) || params->otp_digits < 4)) {
+		return 0;
+	}
+	return 1;
+}
+
+int OTP_generate(const OTP_PARAMS *params, const void *event, size_t eventlen,
+	unsigned int *otp, const unsigned char *key, size_t keylen)
+{
+	int ret = 0;
+	time_t t = 0;
+	unsigned char *id = NULL;
+	size_t idlen;
+	const EVP_MD *md;
+	const EVP_CIPHER *cipher;
+	EVP_MD_CTX *mdctx = NULL;
+	CMAC_CTX *cmctx = NULL;
+	unsigned char s[EVP_MAX_MD_SIZE];
+	size_t slen;
+	uint32_t od;
+	int i, n;
+
+	OPENSSL_assert(sizeof(time_t) == 8);
+
+	if (!check_params(params)) {
+		OTPerr(OTP_F_OTP_GENERATE, OTP_R_INVALID_PARAMS);
+		return 0;
+	}
+
+	idlen = sizeof(uint64_t) + eventlen + params->option_size;
+	if (idlen < 16) {
+		idlen = 16;
+	}
+	if (!(id = OPENSSL_malloc(idlen))) {
+		OTPerr(OTP_F_OTP_GENERATE, ERR_R_MALLOC_FAILURE);
+		goto end;
+	}
+	memset(id, 0, idlen);
+
+	t = time(NULL) + params->offset;
+	t /= params->te;
+
+	memcpy(id, &t, sizeof(t));
+	memcpy(id + sizeof(t), event, eventlen);
+	memcpy(id + sizeof(t) + eventlen, params->option, params->option_size);
+
+
+	/* FIXME: try to get md and cipher, and check if cipher is ECB */
+	if (params->type == NID_sm3) {
+		md = EVP_get_digestbynid(params->type);
+		if (!(mdctx = EVP_MD_CTX_new())) {
+			OTPerr(OTP_F_OTP_GENERATE, ERR_R_MALLOC_FAILURE);
+			goto end;
+		}
+		if (!EVP_DigestInit_ex(mdctx, md, NULL)) {
+			OTPerr(OTP_F_OTP_GENERATE, ERR_R_EVP_LIB);
+			goto end;
+		}
+		if (!EVP_DigestUpdate(mdctx, key, keylen)) {
+			OTPerr(OTP_F_OTP_GENERATE, ERR_R_EVP_LIB);
+			goto end;
+		}
+		if (!EVP_DigestUpdate(mdctx, id, idlen)) {
+			OTPerr(OTP_F_OTP_GENERATE, ERR_R_EVP_LIB);
+			goto end;
+		}
+		if (!EVP_DigestFinal_ex(mdctx, s, (unsigned int *)&slen)) {
+			OTPerr(OTP_F_OTP_GENERATE, ERR_R_EVP_LIB);
+			goto end;
+		}
+	} else if (params->type == NID_sms4_ecb) {
+		cipher = EVP_get_cipherbynid(params->type);
+		if (!(cmctx = CMAC_CTX_new())) {
+			OTPerr(OTP_F_OTP_GENERATE, ERR_R_MALLOC_FAILURE);
+			goto end;
+		}
+		if (!CMAC_Init(cmctx, key, keylen, cipher, NULL)) {
+			OTPerr(OTP_F_OTP_GENERATE, OTP_R_CMAC_FAILURE);
+			goto end;
+		}
+		if (!CMAC_Update(cmctx, id, idlen)) {
+			OTPerr(OTP_F_OTP_GENERATE, OTP_R_CMAC_FAILURE);
+			goto end;
+		}
+		if (!CMAC_Final(cmctx, s, &slen)) {
+			OTPerr(OTP_F_OTP_GENERATE, OTP_R_CMAC_FAILURE);
+			goto end;
+		}
+	} else {
+		goto end;
+	}
+	OPENSSL_assert(slen % 4 == 0);
+
+	od = 0;
+
+	n = (int)slen;
+	for (i = 0; i < n/4; i++) {
+		od += GETU32(&s[i * 4]);
+	}
+
+	*otp = od % pow_table[params->otp_digits];
+	ret = 1;
+end:
+	OPENSSL_free(id);
+	EVP_MD_CTX_free(mdctx);
+	CMAC_CTX_free(cmctx);
+	return ret;
+}
+