in digital-document-service/src/main/java/com/epam/digital/data/platform/dgtldcmnt/wrapper/Sha256DigestCalculatingInputStream.java [102:108]
public int read(@NotNull byte[] b, int off, int len) throws IOException {
int ch = is.read(b, off, len);
if (ch != -1) {
digest.update(b, off, ch);
}
return ch;
}