text: /*
   *  Copyright (C) 2017 - This file is part of libecc project
   *
   *  Authors:
   *      Ryad BENADJILA <ryadbenadjila@gmail.com>
   *      Arnaud EBALARD <arnaud.ebalard@ssi.gouv.fr>
   *      Jean-Pierre FLORI <jean-pierre.flori@ssi.gouv.fr>
   *
   *  Contributors:
   *      Nicolas VIVET <nicolas.vivet@ssi.gouv.fr>
   *      Karim KHALFALLAH <karim.khalfallah@ssi.gouv.fr>
   *
   *  This software is licensed under a dual BSD and GPL v2 license.
   *  See LICENSE file at the root folder of the project.
   */
  #include <libecc/lib_ecc_config.h>
  #ifdef WITH_HASH_SHA512
  
  #include <libecc/hash/sha512.h>
  
  /* Init hash function */
  void sha512_init(sha512_context *ctx)
  {
  	MUST_HAVE(ctx != NULL);
  
  	ctx->sha512_total[0] = ctx->sha512_total[1] = 0;
  	ctx->sha512_state[0] = (u64)(0x6A09E667F3BCC908);
  	ctx->sha512_state[1] = (u64)(0xBB67AE8584CAA73B);
  	ctx->sha512_state[2] = (u64)(0x3C6EF372FE94F82B);
  	ctx->sha512_state[3] = (u64)(0xA54FF53A5F1D36F1);
  	ctx->sha512_state[4] = (u64)(0x510E527FADE682D1);
  	ctx->sha512_state[5] = (u64)(0x9B05688C2B3E6C1F);
  	ctx->sha512_state[6] = (u64)(0x1F83D9ABFB41BD6B);
  	ctx->sha512_state[7] = (u64)(0x5BE0CD19137E2179);
  
  	/* Tell that we are initialized */
  	ctx->magic = SHA512_HASH_MAGIC;
  }
  
  /* Update hash function */
  void sha512_update(sha512_context *ctx, const u8 *input, u32 ilen)
  {
  	SHA512_HASH_CHECK_INITIALIZED(ctx);
  
  	sha512_core_update(ctx, input, ilen);
  
  	return;
  }
  
  /* Finalize */
  void sha512_final(sha512_context *ctx, u8 output[SHA512_DIGEST_SIZE])
  {
  	SHA512_HASH_CHECK_INITIALIZED(ctx);
  
  	sha512_core_final(ctx, output, SHA512_DIGEST_SIZE);
  
  	/* Tell that we are uninitialized */
  	ctx->magic = 0;
  
  	return;
  }
  
  void sha512_scattered(const u8 **inputs, const u32 *ilens,
  		      u8 output[SHA512_DIGEST_SIZE])
  {
  	sha512_context ctx;
  	int pos = 0;
  
  	sha512_init(&ctx);
  
  	while (inputs[pos] != NULL) {
  		sha512_update(&ctx, inputs[pos], ilens[pos]);
  		pos += 1;
  	}
  
  	sha512_final(&ctx, output);
  }
  
  void sha512(const u8 *input, u32 ilen, u8 output[SHA512_DIGEST_SIZE])
  {
  	sha512_context ctx;
  
  	sha512_init(&ctx);
  	sha512_update(&ctx, input, ilen);
  	sha512_final(&ctx, output);
  }
  
  #else /* WITH_HASH_SHA512 */
  
  /*
   * Dummy definition to avoid the empty translation unit ISO C warning
   */
  typedef int dummy;
  #endif /* WITH_HASH_SHA512 */
  