+ return RSA_meth_get_finish(RSA_PKCS1_OpenSSL())(rsa);
+}
+
+/* Cipher helper functions */
+
+static int dasync_cipher_ctrl_helper(EVP_CIPHER_CTX *ctx, int type, int arg,
+ void *ptr, int aeadcapable)
+{
+ int ret;
+ struct dasync_pipeline_ctx *pipe_ctx =
+ (struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
+
+ if (pipe_ctx == NULL)
+ return 0;
+
+ switch (type) {
+ case EVP_CTRL_SET_PIPELINE_OUTPUT_BUFS:
+ pipe_ctx->numpipes = arg;
+ pipe_ctx->outbufs = (unsigned char **)ptr;
+ break;
+
+ case EVP_CTRL_SET_PIPELINE_INPUT_BUFS:
+ pipe_ctx->numpipes = arg;
+ pipe_ctx->inbufs = (unsigned char **)ptr;
+ break;
+
+ case EVP_CTRL_SET_PIPELINE_INPUT_LENS:
+ pipe_ctx->numpipes = arg;
+ pipe_ctx->lens = (size_t *)ptr;
+ break;
+
+ case EVP_CTRL_AEAD_SET_MAC_KEY:
+ if (!aeadcapable)
+ return -1;
+ EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx->inner_cipher_data);
+ ret = EVP_CIPHER_meth_get_ctrl(EVP_aes_128_cbc_hmac_sha1())
+ (ctx, type, arg, ptr);
+ EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx);
+ return ret;
+
+ case EVP_CTRL_AEAD_TLS1_AAD:
+ {
+ unsigned char *p = ptr;
+ unsigned int len;
+
+ if (!aeadcapable || arg != EVP_AEAD_TLS1_AAD_LEN)
+ return -1;
+
+ if (pipe_ctx->aadctr >= SSL_MAX_PIPELINES)
+ return -1;
+
+ memcpy(pipe_ctx->tlsaad[pipe_ctx->aadctr], ptr,
+ EVP_AEAD_TLS1_AAD_LEN);
+ pipe_ctx->aadctr++;
+
+ len = p[arg - 2] << 8 | p[arg - 1];
+
+ if (EVP_CIPHER_CTX_encrypting(ctx)) {
+ if ((p[arg - 4] << 8 | p[arg - 3]) >= TLS1_1_VERSION) {
+ if (len < AES_BLOCK_SIZE)
+ return 0;
+ len -= AES_BLOCK_SIZE;
+ }
+
+ return ((len + SHA_DIGEST_LENGTH + AES_BLOCK_SIZE)
+ & -AES_BLOCK_SIZE) - len;
+ } else {
+ return SHA_DIGEST_LENGTH;
+ }
+ }
+
+ default:
+ return 0;
+ }
+
+ return 1;
+}
+
+static int dasync_cipher_init_key_helper(EVP_CIPHER_CTX *ctx,
+ const unsigned char *key,
+ const unsigned char *iv, int enc,
+ const EVP_CIPHER *cipher)
+{
+ int ret;
+ struct dasync_pipeline_ctx *pipe_ctx =
+ (struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
+
+ if (pipe_ctx->inner_cipher_data == NULL
+ && EVP_CIPHER_impl_ctx_size(cipher) != 0) {
+ pipe_ctx->inner_cipher_data = OPENSSL_zalloc(
+ EVP_CIPHER_impl_ctx_size(cipher));
+ if (pipe_ctx->inner_cipher_data == NULL) {
+ DASYNCerr(DASYNC_F_DASYNC_CIPHER_INIT_KEY_HELPER,
+ ERR_R_MALLOC_FAILURE);
+ return 0;
+ }
+ }
+
+ pipe_ctx->numpipes = 0;
+ pipe_ctx->aadctr = 0;
+
+ EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx->inner_cipher_data);
+ ret = EVP_CIPHER_meth_get_init(cipher)(ctx, key, iv, enc);
+ EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx);
+
+ return ret;
+}
+
+static int dasync_cipher_helper(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl,
+ const EVP_CIPHER *cipher)
+{
+ int ret = 1;
+ unsigned int i, pipes;
+ struct dasync_pipeline_ctx *pipe_ctx =
+ (struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
+
+ pipes = pipe_ctx->numpipes;
+ EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx->inner_cipher_data);
+ if (pipes == 0) {
+ if (pipe_ctx->aadctr != 0) {
+ if (pipe_ctx->aadctr != 1)
+ return -1;
+ EVP_CIPHER_meth_get_ctrl(cipher)
+ (ctx, EVP_CTRL_AEAD_TLS1_AAD,
+ EVP_AEAD_TLS1_AAD_LEN,
+ pipe_ctx->tlsaad[0]);
+ }
+ ret = EVP_CIPHER_meth_get_do_cipher(cipher)
+ (ctx, out, in, inl);
+ } else {
+ if (pipe_ctx->aadctr > 0 && pipe_ctx->aadctr != pipes)
+ return -1;
+ for (i = 0; i < pipes; i++) {
+ if (pipe_ctx->aadctr > 0) {
+ EVP_CIPHER_meth_get_ctrl(cipher)
+ (ctx, EVP_CTRL_AEAD_TLS1_AAD,
+ EVP_AEAD_TLS1_AAD_LEN,
+ pipe_ctx->tlsaad[i]);
+ }
+ ret = ret && EVP_CIPHER_meth_get_do_cipher(cipher)
+ (ctx, pipe_ctx->outbufs[i], pipe_ctx->inbufs[i],
+ pipe_ctx->lens[i]);
+ }
+ pipe_ctx->numpipes = 0;
+ }
+ pipe_ctx->aadctr = 0;
+ EVP_CIPHER_CTX_set_cipher_data(ctx, pipe_ctx);
+ return ret;
+}
+
+static int dasync_cipher_cleanup_helper(EVP_CIPHER_CTX *ctx,
+ const EVP_CIPHER *cipher)
+{
+ struct dasync_pipeline_ctx *pipe_ctx =
+ (struct dasync_pipeline_ctx *)EVP_CIPHER_CTX_get_cipher_data(ctx);
+
+ OPENSSL_clear_free(pipe_ctx->inner_cipher_data,
+ EVP_CIPHER_impl_ctx_size(cipher));
+
+ return 1;
+}
+
+/*
+ * AES128 CBC Implementation
+ */
+
+static int dasync_aes128_cbc_ctrl(EVP_CIPHER_CTX *ctx, int type, int arg,
+ void *ptr)
+{
+ return dasync_cipher_ctrl_helper(ctx, type, arg, ptr, 0);
+}
+
+static int dasync_aes128_init_key(EVP_CIPHER_CTX *ctx, const unsigned char *key,
+ const unsigned char *iv, int enc)
+{
+ return dasync_cipher_init_key_helper(ctx, key, iv, enc, EVP_aes_128_cbc());
+}
+
+static int dasync_aes128_cbc_cipher(EVP_CIPHER_CTX *ctx, unsigned char *out,
+ const unsigned char *in, size_t inl)
+{
+ return dasync_cipher_helper(ctx, out, in, inl, EVP_aes_128_cbc());
+}
+
+static int dasync_aes128_cbc_cleanup(EVP_CIPHER_CTX *ctx)
+{
+ return dasync_cipher_cleanup_helper(ctx, EVP_aes_128_cbc());
+}
+
+
+/*
+ * AES128 CBC HMAC SHA1 Implementation
+ */
+
+static int dasync_aes128_cbc_hmac_sha1_ctrl(EVP_CIPHER_CTX *ctx, int type,
+ int arg, void *ptr)
+{
+ return dasync_cipher_ctrl_helper(ctx, type, arg, ptr, 1);
+}
+
+static int dasync_aes128_cbc_hmac_sha1_init_key(EVP_CIPHER_CTX *ctx,
+ const unsigned char *key,
+ const unsigned char *iv,
+ int enc)
+{
+ /*
+ * We can safely assume that EVP_aes_128_cbc_hmac_sha1() != NULL,
+ * see comment before the definition of dasync_aes_128_cbc_hmac_sha1().
+ */
+ return dasync_cipher_init_key_helper(ctx, key, iv, enc,
+ EVP_aes_128_cbc_hmac_sha1());
+}
+
+static int dasync_aes128_cbc_hmac_sha1_cipher(EVP_CIPHER_CTX *ctx,
+ unsigned char *out,
+ const unsigned char *in,
+ size_t inl)
+{
+ return dasync_cipher_helper(ctx, out, in, inl, EVP_aes_128_cbc_hmac_sha1());
+}
+
+static int dasync_aes128_cbc_hmac_sha1_cleanup(EVP_CIPHER_CTX *ctx)
+{
+ /*
+ * We can safely assume that EVP_aes_128_cbc_hmac_sha1() != NULL,
+ * see comment before the definition of dasync_aes_128_cbc_hmac_sha1().
+ */
+ return dasync_cipher_cleanup_helper(ctx, EVP_aes_128_cbc_hmac_sha1());