+ last->next->file_buf = NULL;
+
+ ret = mbedtls_pem_write_buffer(PEM_BEGIN_CRT, PEM_END_CRT, crt->raw.p,
+ crt->raw.len, NULL, 0, &olen);
+ if (MBEDTLS_ERR_BASE64_BUFFER_TOO_SMALL != ret)
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Failed to figure out the required X509 PEM certificate buffer size");
+ return -1;
+ }
+ pem_buffer_length = olen;
+
+ last->file_buf = malloc(pem_buffer_length);
+ if (last->file_buf == NULL)
+ {
+ log_error(LOG_LEVEL_ERROR,
+ "Failed to allocate %lu bytes to store the X509 PEM certificate",
+ pem_buffer_length);
+ return -1;
+ }