lcx_sha256.h

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/*******************************************************************************
 *   Ledger Nano S - Secure firmware
 *   (c) 2022 Ledger
 *
 *  Licensed 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.
 ********************************************************************************/
 
#ifndef LCX_SHA256_H
#define LCX_SHA256_H
 
#if defined(HAVE_SHA256) || defined(HAVE_SHA224)
 
#include "lcx_wrappers.h"
#include "lcx_hash.h"
#include <stddef.h>
#include <stdint.h>
 
#define CX_SHA224_SIZE 28
 
#define CX_SHA256_SIZE 32
 
struct cx_sha256_s {
    struct cx_hash_header_s header;      
    size_t                  blen;        
    uint8_t                 block[64];   
    uint8_t                 acc[8 * 4];  
};
typedef struct cx_sha256_s cx_sha256_t;
 
#if defined(HAVE_SHA224)
// No need to add WARN_UNUSED_RESULT to cx_sha224_init_no_throw(), it always returns CX_OK
cx_err_t cx_sha224_init_no_throw(cx_sha256_t *hash);
 
static inline int cx_sha224_init(cx_sha256_t *hash)
{
    cx_sha224_init_no_throw(hash);
    return CX_SHA224;
}
 
cx_err_t cx_sha224_hash_iovec(const cx_iovec_t *iovec,
                              size_t            iovec_len,
                              uint8_t           digest[static CX_SHA224_SIZE]);
 
static inline cx_err_t cx_sha224_hash(const uint8_t *in,
                                      size_t         in_len,
                                      uint8_t        digest[static CX_SHA224_SIZE])
{
    const cx_iovec_t iovec = {.iov_base = in, .iov_len = in_len};
 
    return cx_sha224_hash_iovec(&iovec, 1, digest);
}
#endif  // HAVE_SHA224
 
// No need to add WARN_UNUSED_RESULT to cx_sha256_init_no_throw(), it always returns CX_OK
cx_err_t cx_sha256_init_no_throw(cx_sha256_t *hash);
 
static inline int cx_sha256_init(cx_sha256_t *hash)
{
    cx_sha256_init_no_throw(hash);
    return CX_SHA256;
}
 
cx_err_t cx_sha256_hash_iovec(const cx_iovec_t *iovec,
                              size_t            iovec_len,
                              uint8_t           digest[static CX_SHA256_SIZE]);
 
static inline cx_err_t cx_sha256_hash(const uint8_t *in,
                                      size_t         in_len,
                                      uint8_t        digest[static CX_SHA256_SIZE])
{
    const cx_iovec_t iovec = {.iov_base = in, .iov_len = in_len};
 
    return cx_sha256_hash_iovec(&iovec, 1, digest);
}
 
size_t cx_hash_sha256(const uint8_t *in, size_t len, uint8_t *out, size_t out_len);
 
#endif  // defined(HAVE_SHA256) || defined(HAVE_SHA224)
 
#endif  // LCX_SHA256_H