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X509_NAME_HASH(3)      FreeBSD Library Functions Manual	     X509_NAME_HASH(3)

NAME
     X509_NAME_hash, X509_issuer_name_hash, X509_subject_name_hash,
     X509_NAME_hash_old, X509_issuer_name_hash_old, X509_subject_name_hash_old
     --	calculate SHA-1	or MD5 hashes of X.501 Name objects

SYNOPSIS
     #include <openssl/x509.h>

     unsigned long
     X509_NAME_hash(X509_NAME *name);

     unsigned long
     X509_issuer_name_hash(X509	*x);

     unsigned long
     X509_subject_name_hash(X509 *x);

     unsigned long
     X509_NAME_hash_old(X509_NAME *name);

     unsigned long
     X509_issuer_name_hash_old(X509 *x);

     unsigned long
     X509_subject_name_hash_old(X509 *x);

DESCRIPTION
     X509_NAME_hash() calculates an SHA1(3) hash of the	DER-encoded form of
     name.  It is for example used by X509_LOOKUP_hash_dir(3) to locate	cer-
     tificate files in the file	system.

     X509_issuer_name_hash() and X509_subject_name_hash() are wrappers to cal-
     culate this hash of the issuer or subject name of x, respectively.

     X509_NAME_hash_old(), X509_issuer_name_hash_old(),	and
     X509_subject_name_hash_old() are variants that use	MD5 instead of SHA-1.

RETURN VALUES
     These functions return the	hash value or 0	if an error occurs.

SEE ALSO
     i2d_X509_NAME(3), X509_get_subject_name(3), X509_LOOKUP_new(3),
     X509_NAME_digest(3), X509_NAME_new(3)

HISTORY
     X509_subject_name_hash() first appeared in	SSLeay 0.4.0,
     X509_issuer_name_hash() in	SSLeay 0.5.1, and X509_NAME_hash() in SSLeay
     0.8.0.  They were switched	to hashing the DER representation of the name
     rather than an ASCII rendering in SSLeay 0.9.0 and	have all been avail-
     able since	OpenBSD	2.4.

     They were switched	to using SHA1 instead of MD5 in	OpenSSL	1.0.0 and in
     OpenBSD 4.9.

     X509_NAME_hash_old(), X509_issuer_name_hash_old(),	and
     X509_subject_name_hash_old() first	appeared in OpenSSL 1.0.0 and have
     been available since OpenBSD 4.9.

FreeBSD	13.0			 July 31, 2021			  FreeBSD 13.0
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUES | SEE ALSO | HISTORY

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