Android_verify/third_party/android-libs/share/man/man3/EVP_PBE_CipherInit.3ossl

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.\"
.IX Title "EVP_PBE_CIPHERINIT 3ossl"
.TH EVP_PBE_CIPHERINIT 3ossl "2024-09-03" "3.3.2" "OpenSSL"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "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
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 1
\& #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);
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
.SS "\s-1PBE\s0 operations"
.IX Subsection "PBE operations"
\&\fBEVP_PBE_CipherInit()\fR and \fBEVP_PBE_CipherInit_ex()\fR initialise an \fB\s-1EVP_CIPHER_CTX\s0\fR
\&\fIctx\fR for encryption (\fIen_de\fR=1) or decryption (\fIen_de\fR=0) using the password
\&\fIpass\fR of length \fIpasslen\fR. The \s-1PBE\s0 algorithm type and parameters are extracted
from an \s-1OID\s0 \fIpbe_obj\fR and parameters \fIparam\fR.
.PP
\&\fBEVP_PBE_CipherInit_ex()\fR also allows the application to specify a library context
\&\fIlibctx\fR and property query \fIpropq\fR to select appropriate algorithm
implementations.
.SS "\s-1PBE\s0 algorithm search"
.IX Subsection "PBE algorithm search"
\&\fBEVP_PBE_find()\fR and \fBEVP_PBE_find_ex()\fR search for a matching algorithm using two parameters:
.PP
1. An algorithm type \fItype\fR which can be:
.IP "\(bu" 4
\&\s-1EVP_PBE_TYPE_OUTER\s0 \- A \s-1PBE\s0 algorithm
.IP "\(bu" 4
\&\s-1EVP_PBE_TYPE_PRF\s0 \- A pseudo-random function
.IP "\(bu" 4
\&\s-1EVP_PBE_TYPE_KDF\s0 \- A key derivation function
.PP
2. A \fIpbe_nid\fR which can represent the algorithm identifier with parameters e.g.
\&\fBNID_pbeWithSHA1AndRC2_CBC\fR or an algorithm class e.g. \fBNID_pbes2\fR.
.PP
They return the algorithm's cipher \s-1ID\s0 \fIpcnid\fR, digest \s-1ID\s0 \fIpmnid\fR and a key
generation function for the algorithm \fIpkeygen\fR. \fBEVP_PBE_CipherInit_ex()\fR also
returns an extended key generation function \fIkeygen_ex\fR which takes a library
context and property query.
.PP
If a \s-1NULL\s0 is supplied for any of \fIpcnid\fR, \fIpmnid\fR, \fIpkeygen\fR or \fIpkeygen_ex\fR
then this parameter is not returned.
.SS "\s-1PBE\s0 algorithm add"
.IX Subsection "PBE algorithm add"
\&\fBEVP_PBE_alg_add_type()\fR and \fBEVP_PBE_alg_add()\fR add an algorithm to the list
of known algorithms. Their parameters have the same meaning as for
\&\fBEVP_PBE_find()\fR and \fBEVP_PBE_find_ex()\fR functions.
.SH "NOTES"
.IX Header "NOTES"
The arguments \fIpbe_obj\fR and \fIparam\fR to \fBEVP_PBE_CipherInit()\fR and \fBEVP_PBE_CipherInit_ex()\fR
together form an \fBX509_ALGOR\fR and can often be extracted directly from this structure.
.SH "RETURN VALUES"
.IX Header "RETURN VALUES"
Return value is 1 for success and 0 if an error occurred.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fBPKCS5_PBE_keyivgen\fR\|(3),
\&\fBPKCS12_PBE_keyivgen_ex\fR\|(3),
\&\fBPKCS5_v2_PBE_keyivgen_ex\fR\|(3),
\&\fBPKCS12_pbe_crypt_ex\fR\|(3),
\&\fBPKCS12_create_ex\fR\|(3)
.SH "HISTORY"
.IX Header "HISTORY"
\&\fBEVP_PBE_CipherInit_ex()\fR and \fBEVP_PBE_find_ex()\fR were added in OpenSSL 3.0.
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
Copyright 2021 The OpenSSL Project Authors. All Rights Reserved.
.PP
Licensed under the Apache License 2.0 (the \*(L"License\*(R").  You may not use
this file except in compliance with the License.  You can obtain a copy
in the file \s-1LICENSE\s0 in the source distribution or at
<https://www.openssl.org/source/license.html>.