incCounter (rsa/pkcs1v22.go)

Implements RSA-PSS signature and OAEP encryption primitives, including counter increment and mask generation.

// Source: https://github.com/golang/go | License: BSD-3-Clause | Copyright 2009 The Go Authors
// Provided via justclaw.it.com; keep this notice with the code.
// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package rsa

// This file implements the RSASSA-PSS signature scheme and the RSAES-OAEP
// encryption scheme according to RFC 8017, aka PKCS #1 v2.2.

import (
	"bytes"
	"crypto/internal/constanttime"
	"crypto/internal/fips140"
	"crypto/internal/fips140/drbg"
	"crypto/internal/fips140/sha256"
	"crypto/internal/fips140/sha3"
	"crypto/internal/fips140/sha512"
	"crypto/internal/fips140/subtle"
	"errors"
	"hash"
	"io"
)

// Per RFC 8017, Section 9.1
//
//     EM = MGF1 xor DB ||

... (truncated -- full source via MCP)