/*

 * 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 "collisiondetect.h"

int git_hash_sha1_global_init(void)

{

  return 0;

}

int git_hash_sha1_ctx_init(git_hash_sha1_ctx *ctx)

{

  return git_hash_sha1_init(ctx);

}

void git_hash_sha1_ctx_cleanup(git_hash_sha1_ctx *ctx)

{

  GIT_UNUSED(ctx);

}

int git_hash_sha1_init(git_hash_sha1_ctx *ctx)

{

  GIT_ASSERT_ARG(ctx);

  SHA1DCInit(&ctx->c);

  return 0;

}

int git_hash_sha1_update(git_hash_sha1_ctx *ctx, const void *data, size_t len)

{

  GIT_ASSERT_ARG(ctx);

  SHA1DCUpdate(&ctx->c, data, len);

  return 0;

}

int git_hash_sha1_final(unsigned char *out, git_hash_sha1_ctx *ctx)

{

  GIT_ASSERT_ARG(ctx);

  if (SHA1DCFinal(out, &ctx->c)) {

    git_error_set(GIT_ERROR_SHA, "SHA1 collision attack detected");

    return -1;

  }

  return 0;

}