NAME

       EVP_PBE_CipherInit, EVP_PBE_CipherInit_ex, EVP_PBE_find, EVP_PBE_find_ex,
       EVP_PBE_alg_add_type, EVP_PBE_alg_add - Password based encryption routines

SYNOPSIS

        #include <openssl/evp.h>

        int EVP_PBE_CipherInit(ASN1_OBJECT *pbe_obj, const char *pass, int passlen,
                               ASN1_TYPE *param, EVP_CIPHER_CTX *ctx, int en_de);
        int EVP_PBE_CipherInit_ex(ASN1_OBJECT *pbe_obj, const char *pass, int passlen,
                                  ASN1_TYPE *param, EVP_CIPHER_CTX *ctx, int en_de,
                                  OSSL_LIB_CTX *libctx, const char *propq);

        int EVP_PBE_find(int type, int pbe_nid, int *pcnid, int *pmnid,
                         EVP_PBE_KEYGEN **pkeygen);
        int EVP_PBE_find_ex(int type, int pbe_nid, int *pcnid, int *pmnid,
                            EVP_PBE_KEYGEN **pkeygen, EVP_PBE_KEYGEN_EX **keygen_ex);

        int EVP_PBE_alg_add_type(int pbe_type, int pbe_nid, int cipher_nid,
                                 int md_nid, EVP_PBE_KEYGEN *keygen);
        int EVP_PBE_alg_add(int nid, const EVP_CIPHER *cipher, const EVP_MD *md,
                            EVP_PBE_KEYGEN *keygen);

DESCRIPTION

   PBE operations
       EVP_PBE_CipherInit() and EVP_PBE_CipherInit_ex() initialise an EVP_CIPHER_CTX ctx for
       encryption (en_de=1) or decryption (en_de=0) using the password pass of length passlen.
       The PBE algorithm type and parameters are extracted from an OID pbe_obj and parameters
       param.

       EVP_PBE_CipherInit_ex() also allows the application to specify a library context libctx
       and property query propq to select appropriate algorithm implementations.

   PBE algorithm search
       EVP_PBE_find() and EVP_PBE_find_ex() search for a matching algorithm using two parameters:

       1. An algorithm type type which can be:

       •   EVP_PBE_TYPE_OUTER - A PBE algorithm

       •   EVP_PBE_TYPE_PRF - A pseudo-random function

       •   EVP_PBE_TYPE_KDF - A key derivation function

       2. A pbe_nid which can represent the algorithm identifier with parameters e.g.
       NID_pbeWithSHA1AndRC2_CBC or an algorithm class e.g. NID_pbes2.

       They return the algorithm's cipher ID pcnid, digest ID pmnid and a key generation function
       for the algorithm pkeygen. EVP_PBE_CipherInit_ex() also returns an extended key generation
       function keygen_ex which takes a library context and property query.

       If a NULL is supplied for any of pcnid, pmnid, pkeygen or pkeygen_ex then this parameter
       is not returned.

   PBE algorithm add
       EVP_PBE_alg_add_type() and EVP_PBE_alg_add() add an algorithm to the list of known
       algorithms. Their parameters have the same meaning as for EVP_PBE_find() and
       EVP_PBE_find_ex() functions.

NOTES

       The arguments pbe_obj and param to EVP_PBE_CipherInit() and EVP_PBE_CipherInit_ex()
       together form an X509_ALGOR and can often be extracted directly from this structure.

RETURN VALUES

       Return value is 1 for success and 0 if an error occurred.

SEE ALSO

       PKCS5_PBE_keyivgen(3), PKCS12_PBE_keyivgen_ex(3), PKCS5_v2_PBE_keyivgen_ex(3),
       PKCS12_pbe_crypt_ex(3), PKCS12_create_ex(3)

HISTORY

       EVP_PBE_CipherInit_ex() and EVP_PBE_find_ex() were added in OpenSSL 3.0.

COPYRIGHT

       Copyright 2021-2022 The OpenSSL Project Authors. All Rights Reserved.

       Licensed under the Apache License 2.0 (the "License").  You may not use this file except
       in compliance with the License.  You can obtain a copy in the file LICENSE in the source
       distribution or at <https://www.openssl.org/source/license.html>.