Edit File: X509_up_ref.3
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Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" X509_chain_up_ref, X509_new, X509_free, X509_up_ref \- X509 certificate ASN1 allocation functions .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 1 \& #include <openssl/x509.h> \& \& X509 *X509_new(void); \& void X509_free(X509 *a); \& int X509_up_ref(X509 *a); \& STACK_OF(X509) *X509_chain_up_ref(STACK_OF(X509) *x); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" The X509 \s-1ASN1\s0 allocation routines, allocate and free an X509 structure, which represents an X509 certificate. .PP \&\fBX509_new()\fR allocates and initializes a X509 structure with reference count \&\fB1\fR. .PP \&\fBX509_free()\fR decrements the reference count of \fBX509\fR structure \fBa\fR and frees it up if the reference count is zero. If \fBa\fR is \s-1NULL\s0 nothing is done. .PP \&\fBX509_up_ref()\fR increments the reference count of \fBa\fR. .PP \&\fBX509_chain_up_ref()\fR increases the reference count of all certificates in chain \fBx\fR and returns a copy of the stack. .SH "NOTES" .IX Header "NOTES" The function \fBX509_up_ref()\fR if useful if a certificate structure is being used by several different operations each of which will free it up after use: this avoids the need to duplicate the entire certificate structure. .PP The function \fBX509_chain_up_ref()\fR doesn't just up the reference count of each certificate it also returns a copy of the stack, using \fBsk_X509_dup()\fR, but it serves a similar purpose: the returned chain persists after the original has been freed. .SH "RETURN VALUES" .IX Header "RETURN VALUES" If the allocation fails, \fBX509_new()\fR returns \fB\s-1NULL\s0\fR and sets an error code that can be obtained by \fBERR_get_error\fR\|(3). Otherwise it returns a pointer to the newly allocated structure. .PP \&\fBX509_up_ref()\fR returns 1 for success and 0 for failure. .PP \&\fBX509_chain_up_ref()\fR returns a copy of the stack or \fB\s-1NULL\s0\fR if an error occurred. .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBd2i_X509\fR\|(3), \&\fBERR_get_error\fR\|(3), \&\fBX509_CRL_get0_by_serial\fR\|(3), \&\fBX509_get0_signature\fR\|(3), \&\fBX509_get_ext_d2i\fR\|(3), \&\fBX509_get_extension_flags\fR\|(3), \&\fBX509_get_pubkey\fR\|(3), \&\fBX509_get_subject_name\fR\|(3), \&\fBX509_get_version\fR\|(3), \&\fBX509_NAME_add_entry_by_txt\fR\|(3), \&\fBX509_NAME_ENTRY_get_object\fR\|(3), \&\fBX509_NAME_get_index_by_NID\fR\|(3), \&\fBX509_NAME_print_ex\fR\|(3), \&\fBX509_sign\fR\|(3), \&\fBX509V3_get_d2i\fR\|(3), \&\fBX509_verify_cert\fR\|(3) .SH "COPYRIGHT" .IX Header "COPYRIGHT" Copyright 2002\-2016 The OpenSSL Project Authors. All Rights Reserved. .PP Licensed under the OpenSSL license (the \*(L"License\*(R"). You may not use this file except in compliance with the License. You can obtain a copy in the file \s-1LICENSE\s0 in the source distribution or at <https://www.openssl.org/source/license.html>.