# DB_ENV->set_encrypt

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    #include <db.h>

    int
    DB_ENV->set_encrypt(DB_ENV *dbenv, const char *passwd, u_int32_t flags);

# Description

Set the password used by the DB_ENV and DB methods to perform encryption and decryption.

The flags value must be set to 0 or the following value:

DB_ENCRYPT_AES
  Use the Rijndael/AES (also known as the Advanced Encryption Standard and Federal Information Processing Standard (FIPS) 197) algorithm for encryption or decryption.

The DB_ENV->set_encrypt method configures a database environment, not only operations performed using the specified DB_ENV handle.

The DB_ENV->set_encrypt interface may not be called after the DB_ENV->open interface is called. If the database environment already exists when DB_ENV->open is called, the information specified to DB_ENV->set_encrypt must be consistent with the existing environment or an error will be returned.

The DB_ENV->set_encrypt method returns a non-zero error value on failure and 0 on success.

# Errors

The DB_ENV->set_encrypt method may fail and return a non-zero error for the following conditions:

EINVAL
  An invalid flag value or parameter was specified.

  Called after DB_ENV->open was called.

EOPNOTSUPP
  Cryptography is not available in this Berkeley DB release.

The DB_ENV->set_encrypt method may fail and return a non-zero error for errors specified for other Berkeley DB and C library or system functions. If a catastrophic error has occurred, the DB_ENV->set_encrypt method may fail and return DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.

# Class

DB_ENV

# See Also

Database Environments and Related Methods`

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