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/*
* This file is from the Apache Portable Runtime Library.
* The full upstream copyright and license statement is included below.
* Modifications copyright (c) 2009 Nicira, Inc.
*/
/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* NIST Secure Hash Algorithm
* heavily modified by Uwe Hollerbach uh@alumni.caltech edu
* from Peter C. Gutmann's implementation as found in
* Applied Cryptography by Bruce Schneier
* This code is hereby placed in the public domain
*/
#ifndef SHA1_H
#define SHA1_H
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#ifdef HAVE_OPENSSL
#include <openssl/evp.h>
#endif
#define SHA1_DIGEST_SIZE 20 /* Size of the SHA1 digest. */
#define SHA1_HEX_DIGEST_LEN 40 /* Length of SHA1 digest as hex in ASCII. */
/* SHA1 context structure. */
struct sha1_ctx {
union {
#ifdef HAVE_OPENSSL
EVP_MD_CTX *ctx; /* OpenSSL context. */
#endif
struct {
uint32_t digest[5]; /* Message digest. */
uint32_t count_lo, count_hi; /* 64-bit bit counts. */
uint32_t data[16]; /* SHA data buffer */
int local; /* Unprocessed amount in data. */
};
};
};
void sha1_init(struct sha1_ctx *);
void sha1_update(struct sha1_ctx *, const void *, uint32_t size);
void sha1_final(struct sha1_ctx *, uint8_t digest[SHA1_DIGEST_SIZE]);
void sha1_bytes(const void *, uint32_t size, uint8_t digest[SHA1_DIGEST_SIZE]);
#define SHA1_FMT \
"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x" \
"%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x"
#define SHA1_ARGS(DIGEST) \
((DIGEST)[0]), ((DIGEST)[1]), ((DIGEST)[2]), ((DIGEST)[3]), \
((DIGEST)[4]), ((DIGEST)[5]), ((DIGEST)[6]), ((DIGEST)[7]), \
((DIGEST)[8]), ((DIGEST)[9]), ((DIGEST)[10]), ((DIGEST)[11]), \
((DIGEST)[12]), ((DIGEST)[13]), ((DIGEST)[14]), ((DIGEST)[15]), \
((DIGEST)[16]), ((DIGEST)[17]), ((DIGEST)[18]), ((DIGEST)[19])
void sha1_to_hex(const uint8_t digest[SHA1_DIGEST_SIZE],
char hex[SHA1_HEX_DIGEST_LEN + 1]);
bool sha1_from_hex(uint8_t digest[SHA1_DIGEST_SIZE], const char *hex);
/* Generic implementation for the case where OpenSSL is not available.
* This API should not be used directly. Exposed for unit testing. */
void ovs_sha1_init(struct sha1_ctx *);
void ovs_sha1_update(struct sha1_ctx *, const void *, uint32_t size);
void ovs_sha1_final(struct sha1_ctx *, uint8_t digest[SHA1_DIGEST_SIZE]);
void ovs_sha1_bytes(const void *, uint32_t size,
uint8_t digest[SHA1_DIGEST_SIZE]);
#endif /* sha1.h */
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