Passing different encodings to Cipheriv updates results in ERR_INTERNAL_ASSERTION #64689
Description
Version
v26.4.0
Platform
Linux archbtw 7.1.3-arch2-2 #1 SMP PREEMPT_DYNAMIC Thu, 16 Jul 2026 17:41:28 +0000 x86_64 GNU/Linux
Subsystem
Crypto
What steps will reproduce the bug?
let key = scryptSync('hello', 'salt', 24)
let init_vector = randomFillSync(new Uint8Array(16))
const cipher = createCipheriv('aes-192-cbc', key, init_vector);
let encrypted = cipher.update('some clear text data', 'utf8', 'hex');
encrypted += cipher.final('utf8');What is the expected behavior? Why is that the expected behavior?
The error should be handled gracefully and reported to the user.
What do you see instead?
Uncaught Error [ERR_INTERNAL_ASSERTION]: Cannot change encoding
This is caused by either a bug in Node.js or incorrect usage of Node.js internals.
Please open an issue with this stack trace at https://github.com/nodejs/node/issues
at assert.fail (node:internal/assert:17:9)
at getDecoder (node:internal/crypto/cipher:101:12)
at Cipheriv.final (node:internal/crypto/cipher:175:21) {
code: 'ERR_INTERNAL_ASSERTION'
Activity
Archkon commentedon Jul 23, 2026
[-]ERR_INTERNAL_ASSERTION[/-][+]Passing different encodings to Cipheriv updates results in ERR_INTERNAL_ASSERTION[/+]crypto: use user-facing error for output encoding changes
crypto: use user-facing error for output encoding changes
crypto: use user-facing error for output encoding changes
crypto: use user-facing error for output encoding changes