Init commit of gmssl-v3

src/hmac.c

@@ -0,0 +1,158 @@
+/*
+ * Copyright (c) 2014 - 2020 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 <string.h>
+#include <gmssl/hmac.h>
+
+
+#define IPAD	0x36
+#define OPAD	0x5C
+
+
+int hmac_ctx_init(HMAC_CTX *ctx)
+{
+	memset(ctx, 0, sizeof(HMAC_CTX));
+	return 1;
+}
+
+void hmac_ctx_cleanup(HMAC_CTX *ctx)
+{
+	memset(ctx, 0, sizeof(HMAC_CTX));
+}
+
+int hmac_init(HMAC_CTX *ctx, const DIGEST *digest, const unsigned char *key, size_t keylen)
+{
+	uint8_t i_key[DIGEST_MAX_BLOCK_SIZE] = {0};
+	uint8_t o_key[DIGEST_MAX_BLOCK_SIZE] = {0};
+	size_t blocksize;
+	int i;
+
+	if (!ctx || !digest || !key || !keylen) {
+		return 0;
+	}
+
+	ctx->digest = digest;
+
+	blocksize = digest_block_size(digest);
+	if (keylen <= blocksize) {
+		memcpy(i_key, key, keylen);
+		memcpy(o_key, key, keylen);
+	} else {
+		digest_init(&ctx->digest_ctx, digest);
+		digest_update(&ctx->digest_ctx, key, keylen);
+		digest_finish(&ctx->digest_ctx, i_key, &keylen);
+		memcpy(o_key, i_key, keylen);
+	}
+	for (i = 0; i < blocksize; i++) {
+		i_key[i] ^= IPAD;
+		o_key[i] ^= OPAD;
+	}
+
+	digest_init(&ctx->i_ctx, digest);
+	digest_update(&ctx->i_ctx, i_key, blocksize);
+	digest_init(&ctx->o_ctx, digest);
+	digest_update(&ctx->o_ctx, o_key, blocksize);
+	memcpy(&ctx->digest_ctx, &ctx->i_ctx, sizeof(DIGEST_CTX));
+
+	memset(i_key, 0, sizeof(i_key));
+	memset(o_key, 0, sizeof(o_key));
+	return 1;
+}
+
+int hmac_update(HMAC_CTX *ctx, const unsigned char *data, size_t datalen)
+{
+	if (!ctx || (!data &&  datalen != 0)) {
+		return 0;
+	}
+	return digest_update(&ctx->digest_ctx, data, datalen);
+}
+
+int hmac_finish(HMAC_CTX *ctx, unsigned char *mac, size_t *maclen)
+{
+	int ret = 0;
+	size_t i;
+	size_t blocksize;
+
+	if (!digest_finish(&ctx->digest_ctx, mac, maclen)) {
+		return -1;
+	}
+	memcpy(&ctx->digest_ctx, &ctx->o_ctx, sizeof(DIGEST_CTX));
+	if (!digest_update(&ctx->digest_ctx, mac, *maclen)
+		|| !digest_finish(&ctx->digest_ctx, mac, maclen)) {
+		goto end;
+	}
+
+	ret = 1;
+end:
+	return ret;
+}
+
+int hmac_reset(HMAC_CTX *ctx)
+{
+	memcpy(&ctx->digest_ctx, &ctx->i_ctx, sizeof(DIGEST_CTX));
+	return 1;
+}
+
+int hmac(const DIGEST *digest, const unsigned char *key, size_t keylen,
+	const unsigned char *data, size_t datalen,
+	unsigned char *mac, size_t *maclen)
+{
+	int ret = 0;
+	HMAC_CTX ctx;
+
+	if (!hmac_ctx_init(&ctx)
+		|| !hmac_init(&ctx, digest, key, keylen)
+		|| !hmac_update(&ctx, data, datalen)
+		|| !hmac_finish(&ctx, mac, maclen)) {
+		goto end;
+	}
+	ret = 1;
+end:
+	hmac_ctx_cleanup(&ctx);
+	return ret;
+}