thodg/libgit2/src/util/hash/builtin.c

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• Hash : b900981c
  Author :
  Date : 2021-12-12T14:25:25
  

  sha: add sha256 algorithm Add support for a SHA256 hash algorithm, and add the "builtin" SHA256 hash engine (from RFC 6234).

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• src/util/hash/builtin.c

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  
  #include "builtin.h"
  
  int git_hash_sha256_global_init(void)
  {
  	return 0;
  }
  
  int git_hash_sha256_ctx_init(git_hash_sha256_ctx *ctx)
  {
  	return git_hash_sha256_init(ctx);
  }
  
  void git_hash_sha256_ctx_cleanup(git_hash_sha256_ctx *ctx)
  {
  	GIT_UNUSED(ctx);
  }
  
  int git_hash_sha256_init(git_hash_sha256_ctx *ctx)
  {
  	GIT_ASSERT_ARG(ctx);
  	if (SHA256Reset(&ctx->c)) {
  		git_error_set(GIT_ERROR_SHA, "SHA256 error");
  		return -1;
  	}
  	return 0;
  }
  
  int git_hash_sha256_update(git_hash_sha256_ctx *ctx, const void *data, size_t len)
  {
  	GIT_ASSERT_ARG(ctx);
  	if (SHA256Input(&ctx->c, data, len)) {
  		git_error_set(GIT_ERROR_SHA, "SHA256 error");
  		return -1;
  	}
  	return 0;
  }
  
  int git_hash_sha256_final(unsigned char *out, git_hash_sha256_ctx *ctx)
  {
  	GIT_ASSERT_ARG(ctx);
  	if (SHA256Result(&ctx->c, out)) {
  		git_error_set(GIT_ERROR_SHA, "SHA256 error");
  		return -1;
  	}
  	return 0;
  }
  

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