import { type SQL, type AnyColumn } from "drizzle-orm";
/**
 * TiDB / MySQL encryption and compression expressions for Drizzle `sql` fragments.
 * @see https://docs.pingcap.com/tidb/stable/encryption-and-compression-functions
 *
 * TiDB does not support the `kdf_name`, `salt`, and `iterations` arguments for `AES_ENCRYPT` /
 * `AES_DECRYPT` that MySQL 8.0.30+ added. `SM3()` is a TiDB extension (not in MySQL).
 */
export type EncryptSqlInput = SQL | AnyColumn | string | number | boolean;
/** `AES_DECRYPT(data, key [, iv])` */
export declare function aesDecrypt(data: EncryptSqlInput, key: EncryptSqlInput, iv?: EncryptSqlInput): SQL;
/** `AES_ENCRYPT(data, key [, iv])` */
export declare function aesEncrypt(data: EncryptSqlInput, key: EncryptSqlInput, iv?: EncryptSqlInput): SQL;
/** `COMPRESS(expr)` */
export declare function compress(expr: EncryptSqlInput): SQL;
/** `MD5(expr)` */
export declare function md5(expr: EncryptSqlInput): SQL;
/**
 * `PASSWORD(str)` — deprecated; prefer proper key derivation outside SQL.
 * @deprecated In MySQL 8.0 removed; deprecated in TiDB.
 */
export declare function sqlPassword(str: EncryptSqlInput): SQL;
/** `RANDOM_BYTES(n)` */
export declare function randomBytes(n: EncryptSqlInput): SQL;
/** `SHA(expr)` — alias of `SHA1` */
export declare function sha(expr: EncryptSqlInput): SQL;
/** `SHA1(expr)` */
export declare function sha1(expr: EncryptSqlInput): SQL;
/** Second argument to `SHA2(str, n)` per TiDB / MySQL. */
export type Sha2Bits = 0 | 224 | 256 | 384 | 512;
/** `SHA2(str, n)` */
export declare function sha2(str: EncryptSqlInput, n: Sha2Bits): SQL;
/** `SM3(str)` — TiDB extension (SM3-256 digest as hex string). */
export declare function sm3(str: EncryptSqlInput): SQL;
/** `UNCOMPRESS(data)` */
export declare function uncompress(data: EncryptSqlInput): SQL;
/** `UNCOMPRESSED_LENGTH(data)` */
export declare function uncompressedLength(data: EncryptSqlInput): SQL;
/** `VALIDATE_PASSWORD_STRENGTH(str)` — depends on `validate_password.*` system variables. */
export declare function validatePasswordStrength(str: EncryptSqlInput): SQL;
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