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.\" Copyright (c) 2016, 2021 Ingo Schwarze <schwarze@openbsd.org>
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.Dd $Mdocdate: October 30 2021 $
.Dt D2I_X509_CRL 3
.Os
.Sh NAME
.Nm d2i_X509_CRL ,
.Nm i2d_X509_CRL ,
.Nm d2i_X509_CRL_bio ,
.Nm d2i_X509_CRL_fp ,
.Nm i2d_X509_CRL_bio ,
.Nm i2d_X509_CRL_fp ,
.Nm d2i_X509_CRL_INFO ,
.Nm i2d_X509_CRL_INFO ,
.Nm d2i_X509_REVOKED ,
.Nm i2d_X509_REVOKED
.Nd decode and encode X.509 certificate revocation lists
.Sh SYNOPSIS
.In openssl/x509.h
.Ft X509_CRL *
.Fo d2i_X509_CRL
.Fa "X509_CRL **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_X509_CRL
.Fa "X509_CRL *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft X509_CRL *
.Fo d2i_X509_CRL_bio
.Fa "BIO *in_bio"
.Fa "X509_CRL **der_out"
.Fc
.Ft X509_CRL *
.Fo d2i_X509_CRL_fp
.Fa "FILE *in_fp"
.Fa "X509_CRL **der_out"
.Fc
.Ft int
.Fo i2d_X509_CRL_bio
.Fa "BIO *out_bio"
.Fa "X509_CRL *der_in"
.Fc
.Ft int
.Fo i2d_X509_CRL_fp
.Fa "FILE *out_fp"
.Fa "X509_CRL *der_in"
.Fc
.Ft X509_CRL_INFO *
.Fo d2i_X509_CRL_INFO
.Fa "X509_CRL_INFO **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_X509_CRL_INFO
.Fa "X509_CRL_INFO *val_in"
.Fa "unsigned char **der_out"
.Fc
.Ft X509_REVOKED *
.Fo d2i_X509_REVOKED
.Fa "X509_REVOKED **val_out"
.Fa "const unsigned char **der_in"
.Fa "long length"
.Fc
.Ft int
.Fo i2d_X509_REVOKED
.Fa "X509_REVOKED *val_in"
.Fa "unsigned char **der_out"
.Fc
.Sh DESCRIPTION
These functions decode and encode X.509 certificate revocation lists.
For details about the semantics, examples, caveats, and bugs, see
.Xr ASN1_item_d2i 3 .
.Pp
.Fn d2i_X509_CRL
and
.Fn i2d_X509_CRL
decode and encode an ASN.1
.Vt CertificateList
structure defined in RFC 5280 section 5.1.
.Pp
If
.Xr X509_CRL_set_default_method 3
is in effect and the
.Fn crl_init
callback is not
.Dv NULL ,
that callback is invoked at the end of
.Fn d2i_X509_CRL .
.Pp
.Fn d2i_X509_CRL_bio ,
.Fn d2i_X509_CRL_fp ,
.Fn i2d_X509_CRL_bio ,
and
.Fn i2d_X509_CRL_fp
are similar except that they decode or encode using a
.Vt BIO
or
.Vt FILE
pointer.
.Pp
.Fn d2i_X509_CRL_INFO
and
.Fn i2d_X509_CRL_INFO
decode and encode an ASN.1
.Vt TBSCertList
structure defined in RFC 5280 section 5.1.
.Pp
.Fn d2i_X509_REVOKED
and
.Fn i2d_X509_REVOKED
decode and encode an ASN.1 structure representing one element of
the revokedCertificates field of the ASN.1
.Vt TBSCertList
structure.
.Sh SEE ALSO
.Xr ASN1_item_d2i 3 ,
.Xr X509_CRL_METHOD_new 3 ,
.Xr X509_CRL_new 3 ,
.Xr X509_REVOKED_new 3
.Sh STANDARDS
RFC 5280: Internet X.509 Public Key Infrastructure Certificate and
Certificate Revocation List (CRL) Profile,
section 5: CRL and CRL Extensions Profile
.Sh HISTORY
.Fn d2i_X509_CRL ,
.Fn i2d_X509_CRL ,
.Fn d2i_X509_CRL_fp ,
.Fn i2d_X509_CRL_fp ,
.Fn d2i_X509_CRL_INFO ,
.Fn i2d_X509_CRL_INFO ,
.Fn d2i_X509_REVOKED ,
and
.Fn i2d_X509_REVOKED
first appeared in SSLeay 0.5.1.
.Fn d2i_X509_CRL_bio
and
.Fn i2d_X509_CRL_bio
first appeared in SSLeay 0.6.0.
These functions have been available since
.Ox 2.4 .