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D2I_X509_NAME(3) Library Functions Manual D2I_X509_NAME(3)

d2i_X509_NAME, i2d_X509_NAME, X509_NAME_get0_der, X509_NAME_dup, X509_NAME_hash, d2i_X509_NAME_ENTRY, i2d_X509_NAME_ENTRY, X509_NAME_ENTRY_dupdecode and encode X.501 Name objects

#include <openssl/x509.h>

X509_NAME *
d2i_X509_NAME(X509_NAME **val_out, unsigned char **der_in, long length);

int
i2d_X509_NAME(X509_NAME *val_in, unsigned char **der_out);

int
X509_NAME_get0_der(X509_NAME *val_in, const unsigned char **der_out, size_t *out_len);

X509_NAME *
X509_NAME_dup(X509_NAME *val_in);

unsigned long
X509_NAME_hash(X509_NAME *val_in);

X509_NAME_ENTRY *
d2i_X509_NAME_ENTRY(X509_NAME_ENTRY **val_out, unsigned char **der_in, long length);

int
i2d_X509_NAME_ENTRY(X509_NAME_ENTRY *val_in, unsigned char **der_out);

X509_NAME_ENTRY *
X509_NAME_ENTRY_dup(X509_NAME_ENTRY *val_in);

These functions decode and encode X.501 Name objects using DER format. For details about the semantics, examples, caveats, and bugs, see ASN1_item_d2i(3).

d2i_X509_NAME() and i2d_X509_NAME() decode and encode an ASN.1 Name structure defined in RFC 5280 section 4.1.2.4.

X509_NAME_get0_der() is a variant of i2d_X509_NAME() that does not copy the encoded output but instead returns a pointer to the internally cached DER-encoded version of the name. Also, it does not return the length of the output in bytes, but instead stores it in out_len. If the cached encoded form happens to be out of date, both functions update it before copying it or returning a pointer to it.

X509_NAME_dup() copies val_in by calling i2d_X509_NAME() and d2i_X509_NAME().

X509_NAME_hash() calculates a SHA1(3) hash of the DER-encoded form of the name *val_in. It is for example used by X509_LOOKUP_hash_dir(3) to locate certificate files in the file system.

d2i_X509_NAME_ENTRY() and i2d_X509_NAME_ENTRY() decode and encode an ASN.1 RelativeDistinguishedName structure defined in RFC 5280 section 4.1.2.4.

X509_NAME_ENTRY_dup() copies val_in by calling i2d_X509_NAME_ENTRY() and d2i_X509_NAME_ENTRY().

d2i_X509_NAME() and X509_NAME_dup() return the new X509_NAME object or NULL if an error occurs.

X509_NAME_get0_der() returns 1 on success or 0 if an error occurs.

X509_NAME_hash() returns the hash value or 0 if an error occurs.

d2i_X509_NAME_ENTRY() and X509_NAME_ENTRY_dup() return the new X509_NAME_ENTRY object or NULL if an error occurs.

i2d_X509_NAME() and i2d_X509_NAME_ENTRY() return the number of bytes successfully encoded or a negative value if an error occurs.

ASN1_item_d2i(3), X509_NAME_ENTRY_new(3), X509_NAME_new(3), X509_NAME_print_ex(3)

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

ITU-T Recommendation X.690, also known as ISO/IEC 8825-1: Information technology - ASN.1 encoding rules: Specification of Basic Encoding Rules (BER), Canonical Encoding Rules (CER) and Distinguished Encoding Rules (DER).

X509_NAME_dup() first appeared in SSLeay 0.4.4. d2i_X509_NAME(), i2d_X509_NAME(), d2i_X509_NAME_ENTRY(), i2d_X509_NAME_ENTRY(), and X509_NAME_ENTRY_dup() first appeared in SSLeay 0.5.1. X509_NAME_hash() first appeared in SSLeay 0.8.0. These functions have been available since OpenBSD 2.4.

X509_NAME_get0_der() first appeared in OpenSSL 1.1.0 and has been available since OpenBSD 6.3.

March 27, 2018 OpenBSD-current