RSASSA-PKCS1-v1_5 Signature and Verification
This example demonstrates RSA signature and verification using Deno's built-in SubtleCrypto API.
Convert the text to a Uint8Array using TextEncoder (required for signing)
const data = new TextEncoder().encode("Hello, Deno 2.0!");
const { publicKey, privateKey } = await crypto.subtle.generateKey(
{
name: "RSASSA-PKCS1-v1_5",
modulusLength: 2048, // 2048-bit key for strong security
publicExponent: new Uint8Array([1, 0, 1]), // Public exponent: 65537
hash: { name: "SHA-256" },
},
true,
["verify", "sign"],
);Sign the data using the private key
const signature = await crypto.subtle.sign(
{ name: "RSASSA-PKCS1-v1_5" },
privateKey,
data,
);Log the signature as a byte array
console.log("Signature:", new Uint8Array(signature));Verify the signature using the public key
const verification = await crypto.subtle.verify(
{ name: "RSASSA-PKCS1-v1_5" },
publicKey,
signature,
data,
);
console.log("Verification:", verification);Run this example locally using the Deno CLI:
deno run https://docs.deno.com/examples/scripts/rsa_signature.ts