RSA Key Generator

Category: Asymmetric & Elliptic Curve · Node Type ID: asymmetric-rsa-keygen

Generates RSA public/private keypair (1024, 2048, 3072, 4096-bit, PEM & DER)

Overview

Generates a fresh RSA public/private keypair (PKCS#1 v2.2 / RFC 8017) of the selected modulus bit length (1024, 2048, 3072, or 4096 bits) and public exponent ($e = 65537$ or $e = 3$).

For maximum convenience across downstream nodes and external tools, the node simultaneously emits the generated keypair in both ASCII PEM format (Public Key (PEM) / Private Key (PEM) as String, using SPKI and PKCS#8 wrappers) and binary DER format (Public Key (DER) / Private Key (DER) as Bytes).

When to Use

Generating RSA keypairs for RSA-OAEP Encrypt / Decrypt or RSA Sign / Verify.
Exporting standard SPKI PEM/DER public keys and PKCS#8 PEM/DER private keys for inspection or external interoperability.

Parameter Configuration

Parameter (ID)	Type & Default	Visibility Condition	Description & Options
Key Size (Modulus Bits) `modulusLength`	`select` Default: `2048`	Always visible	RSA modulus size in bits: `1024` (128B, fast test only), `2048` (256B, standard), `3072` (384B, high security), or `4096` (512B, ultra security; takes longer to generate). `1024`: 1024-bit (Legacy / Test) `2048`: 2048-bit (Standard) `3072`: 3072-bit (High Security) `4096`: 4096-bit (Ultra Security)
Public Exponent (e) `publicExponent`	`select` Default: `65537`	Always visible	RSA public exponent $e$: `65537` ($2^{16}+1$, standard Fermat prime $F_4$) or `3` (legacy/educational fast verification). `65537`: 65537 (0x10001 - Standard F4) `3`: 3 (0x03 - Fast Verification)
Intended Primary Usage `usage`	`select` Default: `encrypt`	Always visible	Documents the intended primary key usage context (`encrypt` for RSA-OAEP or `sign` for RSA-PSS / PKCS#1 v1.5); the generated key material works with both RSA encryption and RSA signature nodes in NodeCrypto. `encrypt`: Encryption / Decryption (RSA-OAEP) `sign`: Digital Signatures (RSA-PSS / PKCS#1)

Port I/O Specification

See Ports & Connections for general wiring rules, data type colors, and dynamic port creation.

Input Ports

This node has no input ports.

Output Ports

Port Nature: Fixed Output Ports (4 total).

Port Name	Port ID	Data Type	Visibility Condition	Description
`Public Key`	`publicKeyPem`	`String` (PEM)	Always visible	RSA public key formatted as a PKIX SubjectPublicKeyInfo (SPKI) PEM string (`-----BEGIN PUBLIC KEY-----`).
`Private Key`	`privateKeyPem`	`String` (PEM)	Always visible	RSA private key formatted as a PKCS#8 PrivateKeyInfo PEM string (`-----BEGIN PRIVATE KEY-----`).
`Public Key`	`publicKeyDer`	`Bytes` (DER)	Always visible	Binary ASN.1 DER encoding (`Uint8Array`) of the SPKI public key.
`Private Key`	`privateKeyDer`	`Bytes` (DER)	Always visible	Binary ASN.1 DER encoding (`Uint8Array`) of the PKCS#8 private key.

Error Cases

This node has no runtime failure cases (errorProfile: none) and always succeeds for any valid typed input.

Examples

Generating a 2048-bit RSA Keypair for Encryption or Signing

Create an RSA-2048 keypair and wire the DER or PEM outputs to downstream RSA nodes.

Leave Key Size at 2048-bit (Standard) and Public Exponent at 65537.
Connect Public Key (DER) to RSA-OAEP Encrypt and Private Key (DER) to RSA-OAEP Decrypt.