D2I_X509_EXTENSION(3)

NAME
d2i_X509_EXTENSION, i2d_X509_EXTENSION, d2i_X509_EXTENSIONS, i2d_X509_EXTENSIONS - decode and encode X.509 Extensions

SYNOPSIS
libcrypto
#include <openssl/x509.h>
X509_EXTENSION *
d2i_X509_EXTENSION(X509_EXTENSION **val_out, const unsigned char **der_in, long length);
int
i2d_X509_EXTENSION(X509_EXTENSION *val_in, unsigned char **der_out);
X509_EXTENSIONS *
d2i_X509_EXTENSIONS(X509_EXTENSIONS **val_out, const unsigned char **der_in, long length);
int
i2d_X509_EXTENSIONS(X509_EXTENSIONS *val_in, unsigned char **der_out);

DESCRIPTION
d2i_X509_EXTENSION() and i2d_X509_EXTENSION() decode and encode an ASN.1 Extension structure defined in RFC 5280 section 4.1.

d2i_X509_EXTENSIONS() and i2d_X509_EXTENSIONS() decode and encode an ASN.1 Extensions structure defined in RFC 5280 section 4.1, which is a SEQUENCE OF Extension.

RETURN VALUES
d2i_X509_EXTENSION() and d2i_X509_EXTENSIONS() return an X509_EXTENSION or X509_EXTENSIONS object, respectively, or NULL if an error occurs.

i2d_X509_EXTENSION() and i2d_X509_EXTENSIONS() return the number of bytes successfully encoded or a negative value if an error occurs.

SEE ALSO
ASN1_item_d2i(3), X509_EXTENSION_new(3), X509V3_get_d2i(3), X509v3_get_ext_by_NID(3)

STANDARDS
RFC 5280: Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile

HISTORY
d2i_X509_EXTENSION() and i2d_X509_EXTENSION() first appeared in SSLeay 0.6.2 and have been available since OpenBSD 2.4.

d2i_X509_EXTENSIONS() and i2d_X509_EXTENSIONS() first appeared in OpenSSL 0.9.8h and have been available since OpenBSD 4.5.