Exemplos de aead_tls_cleanup em C++ (Cpp)

Exemplo n.º 1

Arquivo: e_tls.c Projeto: gotomypc/tiny-webrtc-gw

static int aead_tls_init(EVP_AEAD_CTX *ctx, const uint8_t *key, size_t key_len,
                         size_t tag_len, enum evp_aead_direction_t dir,
                         const EVP_CIPHER *cipher, const EVP_MD *md,
                         char implicit_iv) {
  if (tag_len != EVP_AEAD_DEFAULT_TAG_LENGTH &&
      tag_len != EVP_MD_size(md)) {
    OPENSSL_PUT_ERROR(CIPHER, aead_tls_init, CIPHER_R_UNSUPPORTED_TAG_SIZE);
    return 0;
  }

  if (key_len != EVP_AEAD_key_length(ctx->aead)) {
    OPENSSL_PUT_ERROR(CIPHER, aead_tls_init, CIPHER_R_BAD_KEY_LENGTH);
    return 0;
  }

  size_t mac_key_len = EVP_MD_size(md);
  size_t enc_key_len = EVP_CIPHER_key_length(cipher);
  assert(mac_key_len + enc_key_len +
         (implicit_iv ? EVP_CIPHER_iv_length(cipher) : 0) == key_len);
  /* Although EVP_rc4() is a variable-length cipher, the default key size is
   * correct for TLS. */

  AEAD_TLS_CTX *tls_ctx = OPENSSL_malloc(sizeof(AEAD_TLS_CTX));
  if (tls_ctx == NULL) {
    OPENSSL_PUT_ERROR(CIPHER, aead_tls_init, ERR_R_MALLOC_FAILURE);
    return 0;
  }
  EVP_CIPHER_CTX_init(&tls_ctx->cipher_ctx);
  HMAC_CTX_init(&tls_ctx->hmac_ctx);
  assert(mac_key_len <= EVP_MAX_MD_SIZE);
  memcpy(tls_ctx->mac_key, key, mac_key_len);
  tls_ctx->mac_key_len = (uint8_t)mac_key_len;
  tls_ctx->implicit_iv = implicit_iv;

  ctx->aead_state = tls_ctx;
  if (!EVP_CipherInit_ex(&tls_ctx->cipher_ctx, cipher, NULL, &key[mac_key_len],
                         implicit_iv ? &key[mac_key_len + enc_key_len] : NULL,
                         dir == evp_aead_seal) ||
      !HMAC_Init_ex(&tls_ctx->hmac_ctx, key, mac_key_len, md, NULL)) {
    aead_tls_cleanup(ctx);
    ctx->aead_state = NULL;
    return 0;
  }
  EVP_CIPHER_CTX_set_padding(&tls_ctx->cipher_ctx, 0);

  return 1;
}

Exemplo n.º 2

Arquivo: e_tls.c Projeto: wolfviking0/webcl-webkit

static int aead_tls_init(EVP_AEAD_CTX *ctx, const uint8_t *key, size_t key_len,
                         size_t tag_len, enum evp_aead_direction_t dir,
                         const EVP_CIPHER *cipher, const EVP_MD *md,
                         char implicit_iv) {
  if (tag_len != EVP_AEAD_DEFAULT_TAG_LENGTH &&
      tag_len != EVP_MD_size(md)) {
    OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_UNSUPPORTED_TAG_SIZE);
    return 0;
  }

  if (key_len != EVP_AEAD_key_length(ctx->aead)) {
    OPENSSL_PUT_ERROR(CIPHER, CIPHER_R_BAD_KEY_LENGTH);
    return 0;
  }

  size_t mac_key_len = EVP_MD_size(md);
  size_t enc_key_len = EVP_CIPHER_key_length(cipher);
  assert(mac_key_len + enc_key_len +
         (implicit_iv ? EVP_CIPHER_iv_length(cipher) : 0) == key_len);

  AEAD_TLS_CTX *tls_ctx = (AEAD_TLS_CTX *)&ctx->state;
  EVP_CIPHER_CTX_init(&tls_ctx->cipher_ctx);
  HMAC_CTX_init(&tls_ctx->hmac_ctx);
  assert(mac_key_len <= EVP_MAX_MD_SIZE);
  OPENSSL_memcpy(tls_ctx->mac_key, key, mac_key_len);
  tls_ctx->mac_key_len = (uint8_t)mac_key_len;
  tls_ctx->implicit_iv = implicit_iv;

  if (!EVP_CipherInit_ex(&tls_ctx->cipher_ctx, cipher, NULL, &key[mac_key_len],
                         implicit_iv ? &key[mac_key_len + enc_key_len] : NULL,
                         dir == evp_aead_seal) ||
      !HMAC_Init_ex(&tls_ctx->hmac_ctx, key, mac_key_len, md, NULL)) {
    aead_tls_cleanup(ctx);
    return 0;
  }
  EVP_CIPHER_CTX_set_padding(&tls_ctx->cipher_ctx, 0);

  return 1;
}