doc: simple doc typo fix

[platform/upstream/nodejs.git] / doc / api / crypto.markdown

diff --git a/doc/api/crypto.markdown b/doc/api/crypto.markdown
index 22f4f54..29fd956 100644 (file)
--- a/doc/api/crypto.markdown
+++ b/doc/api/crypto.markdown
@@ -286,7 +286,7 @@ cipher text should be discarded due to failed authentication.
 ### decipher.setAutoPadding(auto_padding=true)
 
 When data has been encrypted without standard block padding, calling
-`decipher.setAuthPadding(false)` will disable automatic padding to prevent
+`decipher.setAutoPadding(false)` will disable automatic padding to prevent
 [`decipher.final()`][] from checking for and removing padding.
 
 Turning auto padding off will only work if the input data's length is a
@@ -325,19 +325,19 @@ const crypto = require('crypto');
 const assert = require('assert');
 
 // Generate Alice's keys...
-const alice = crypto.createDiffieHellman(11);
+const alice = crypto.createDiffieHellman(2048);
 const alice_key = alice.generateKeys();
 
 // Generate Bob's keys...
-const bob = crypto.createDiffieHellman(11);
+const bob = crypto.createDiffieHellman(alice.getPrime(), alice.getGenerator());
 const bob_key = bob.generateKeys();
 
 // Exchange and generate the secret...
 const alice_secret = alice.computeSecret(bob_key);
 const bob_secret = bob.computeSecret(alice_key);
 
-assert(alice_secret, bob_secret);
-  // OK
+// OK
+assert.equal(alice_secret.toString('hex'), bob_secret.toString('hex'));
 ```
 
 ### diffieHellman.computeSecret(other_public_key[, input_encoding][, output_encoding])
@@ -719,6 +719,28 @@ console.log(sign.sign(private_key, 'hex'));
   // Prints the calculated signature
 ```
 
+A [`sign`][] instance can also be created by just passing in the digest
+algorithm name, in which case OpenSSL will infer the full signature algorithm
+from the type of the PEM-formatted private key, including algorithms that
+do not have directly exposed name constants, e.g. 'ecdsa-with-SHA256'.
+
+Example: signing using ECDSA with SHA256
+
+```js
+const crypto = require('crypto');
+const sign = crypto.createSign('sha256');
+
+sign.update('some data to sign');
+
+const private_key = '-----BEGIN EC PRIVATE KEY-----\n' +
+        'MHcCAQEEIF+jnWY1D5kbVYDNvxxo/Y+ku2uJPDwS0r/VuPZQrjjVoAoGCCqGSM49\n' +
+        'AwEHoUQDQgAEurOxfSxmqIRYzJVagdZfMMSjRNNhB8i3mXyIMq704m2m52FdfKZ2\n' +
+        'pQhByd5eyj3lgZ7m7jbchtdgyOF8Io/1ng==\n' +
+        '-----END EC PRIVATE KEY-----\n';
+
+console.log(sign.sign(private_key).toString('hex'));
+```
+
 ### sign.sign(private_key[, output_format])
 
 Calculates the signature on all the data passed through using either