Client-side encryption matching libsodium's crypto_box_seal (anonymous sealed box).
Algorithm:
The server's public key is resolved in order from:
Client-side encryption matching libsodium's crypto_box_seal (anonymous sealed box). Algorithm: 1. Generate ephemeral Curve25519 (X25519) keypair 2. Derive nonce = BLAKE2b-24(eph_pk || recipient_pk) — matches libsodium exactly 3. Encrypt with NaCl crypto_box(message, nonce, eph_sk, recipient_pk) 4. Output = eph_pk (32 bytes) || ciphertext 5. Base64url-encode without padding The server's public key is resolved in order from: 1. POCKETENV_PUBLIC_KEY environment variable 2. The default production key
(encrypt plaintext)Encrypts plaintext using the server's public key via crypto_box_seal. Returns base64url-encoded ciphertext without padding.
Encrypts plaintext using the server's public key via crypto_box_seal. Returns base64url-encoded ciphertext without padding.
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