crypt.encrypt - Real Function Reference

crypt.encrypt(data: string, key: string, iv?: string, mode?: "CBC" | "ECB" | "CTR" | "AES-CBC" | "AES-ECB" | "AES-CTR"): string | string | nil

Arguments

string

required

Plaintext bytes read from a Lua string.

string

required

Base64 key decoded before it is passed to AES.

string

Optional Base64 IV for CBC or CTR. When omitted for CBC or CTR, a new AES block-size IV is generated.

"CBC" | "ECB" | "CTR" | "AES-CBC" | "AES-ECB" | "AES-CTR"

AES mode. The AES- prefix is removed when present. Defaults to AES-CBC. CBC and ECB use crypto library DEFAULT_PADDING; CTR uses no padding.

Returns

string

Base64-encoded ciphertext.

string | nil

Base64-encoded IV for CBC and CTR; nil for ECB.

Example

Encrypt a Lua string and decrypt the returned ciphertext with the returned IV.

local key = crypt.generatekey()
local ciphertext, iv = crypt.encrypt("hello world", key)

local plaintext = crypt.decrypt(ciphertext, key, iv)

print(ciphertext)
print(iv)
print(plaintext)

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​Example

Arguments

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Example