D2I_X509_ATTRIBUTE(3)

NAME
d2i_X509_ATTRIBUTE, i2d_X509_ATTRIBUTE - decode and encode generic X.501 Attribute

SYNOPSIS
#include <openssl/x509.h>
X509_ATTRIBUTE *
d2i_X509_ATTRIBUTE(X509_ATTRIBUTE **val_out, const unsigned char **der_in, long length);
int
i2d_X509_ATTRIBUTE(X509_ATTRIBUTE *val_in, unsigned char **der_out);

DESCRIPTION
d2i_X509_ATTRIBUTE() and i2d_X509_ATTRIBUTE() decode and encode a generic ASN.1 Attribute structure defined in X.501 section 8.2. For details about the semantics, examples, caveats, and bugs, see ASN1_item_d2i(3).

RETURN VALUES
d2i_X509_ATTRIBUTE() returns an X509_ATTRIBUTE object or NULL if an error occurs.

i2d_X509_ATTRIBUTE() returns the number of bytes successfully encoded or a negative value if an error occurs.

SEE ALSO
ASN1_item_d2i(3), d2i_PKCS12(3), d2i_PKCS8_PRIV_KEY_INFO(3), d2i_X509_EXTENSION(3), d2i_X509_REQ(3), X509_ATTRIBUTE_new(3)

STANDARDS
ITU-T Recommendation X.501, also known as ISO/IEC 9594-2: Information Technology Open Systems Interconnection The Directory: Models, section 8.2: Overall structure

HISTORY
d2i_X509_ATTRIBUTE() and i2d_X509_ATTRIBUTE() first appeared in SSLeay 0.5.1 and have been available since OpenBSD 2.4.