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Title "I2D_RE_X509_TBS 3"
I2D_RE_X509_TBS 3 "2023-02-07" "1.1.1t" "OpenSSL"
For nroff, turn off justification. Always turn off hyphenation; it makes
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"NAME"
d2i_X509_AUX, i2d_X509_AUX, i2d_re_X509_tbs, i2d_re_X509_CRL_tbs, i2d_re_X509_REQ_tbs \- X509 encode and decode functions
"SYNOPSIS"
Header "SYNOPSIS" .Vb 1 #include <openssl/x509.h> \& X509 *d2i_X509_AUX(X509 **px, const unsigned char **in, long len); int i2d_X509_AUX(X509 *x, unsigned char **out); int i2d_re_X509_tbs(X509 *x, unsigned char **out); int i2d_re_X509_CRL_tbs(X509_CRL *crl, unsigned char **pp); int i2d_re_X509_REQ_tbs(X509_REQ *req, unsigned char **pp); .Ve
"DESCRIPTION"
Header "DESCRIPTION" The X509 encode and decode routines encode and parse an \fBX509 structure, which represents an X509 certificate.

\fBd2i_X509_AUX() is similar to d2i_X509\|(3) but the input is expected to consist of an X509 certificate followed by auxiliary trust information. This is used by the \s-1PEM\s0 routines to read \*(L"\s-1TRUSTED CERTIFICATE\*(R"\s0 objects. This function should not be called on untrusted input.

\fBi2d_X509_AUX() is similar to i2d_X509\|(3), but the encoded output contains both the certificate and any auxiliary trust information. This is used by the \s-1PEM\s0 routines to write \*(L"\s-1TRUSTED CERTIFICATE\*(R"\s0 objects. Note that this is a non-standard OpenSSL-specific data format.

\fBi2d_re_X509_tbs() is similar to i2d_X509\|(3) except it encodes only the TBSCertificate portion of the certificate. i2d_re_X509_CRL_tbs() and i2d_re_X509_REQ_tbs() are analogous for \s-1CRL\s0 and certificate request, respectively. The \*(L"re\*(R" in i2d_re_X509_tbs stands for \*(L"re-encode\*(R", and ensures that a fresh encoding is generated in case the object has been modified after creation (see the \s-1BUGS\s0 section).

The encoding of the TBSCertificate portion of a certificate is cached in the X509 structure internally to improve encoding performance and to ensure certificate signatures are verified correctly in some certificates with broken (non-DER) encodings.

If, after modification, the X509 object is re-signed with X509_sign(), the encoding is automatically renewed. Otherwise, the encoding of the TBSCertificate portion of the X509 can be manually renewed by calling \fBi2d_re_X509_tbs().

"RETURN VALUES"
Header "RETURN VALUES" \fBd2i_X509_AUX() returns a valid X509 structure or \s-1NULL\s0 if an error occurred.

\fBi2d_X509_AUX() returns the length of encoded data or -1 on error.

\fBi2d_re_X509_tbs(), i2d_re_X509_CRL_tbs() and i2d_re_X509_REQ_tbs() return the length of encoded data or 0 on error.

"SEE ALSO"
Header "SEE ALSO" \fBERR_get_error\|(3) \fBX509_CRL_get0_by_serial\|(3), \fBX509_get0_signature\|(3), \fBX509_get_ext_d2i\|(3), \fBX509_get_extension_flags\|(3), \fBX509_get_pubkey\|(3), \fBX509_get_subject_name\|(3), \fBX509_get_version\|(3), \fBX509_NAME_add_entry_by_txt\|(3), \fBX509_NAME_ENTRY_get_object\|(3), \fBX509_NAME_get_index_by_NID\|(3), \fBX509_NAME_print_ex\|(3), \fBX509_new\|(3), \fBX509_sign\|(3), \fBX509V3_get_d2i\|(3), \fBX509_verify_cert\|(3)
"COPYRIGHT"
Header "COPYRIGHT" Copyright 2002-2018 The OpenSSL Project Authors. All Rights Reserved.

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>.