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
#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);
The X509 encode and decode routines encode and parse an X509 structure, which represents an X509 certificate.
d2i_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 PEM routines to read " TRUSTED CERTIFICATE" objects. This function should not be called on untrusted input.
i2d_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 PEM routines to write " TRUSTED CERTIFICATE" objects. Note that this is a non-standard OpenSSL-specific data format.
i2d_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 CRL and certificate request, respectively. The "re" in i2d_re_X509_tbs stands for "re-encode", and ensures that a fresh encoding is generated in case the object has been modified after creation (see the BUGS 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 i2d_re_X509_tbs().
d2i_X509_AUX() returns a valid X509 structure or NULL if an error occurred.
i2d_X509_AUX() returns the length of encoded data or -1 on error.
i2d_re_X509_tbs(), i2d_re_X509_CRL_tbs() and i2d_re_X509_REQ_tbs() return the length of encoded data or 0 on error.
ERR_get_error(3) X509_CRL_get0_by_serial(3), X509_get0_signature(3), X509_get_ext_d2i(3), X509_get_extension_flags(3), X509_get_pubkey(3), X509_get_subject_name(3), X509_get_version(3), X509_NAME_add_entry_by_txt(3), X509_NAME_ENTRY_get_object(3), X509_NAME_get_index_by_NID(3), X509_NAME_print_ex(3), X509_new(3), X509_sign(3), X509V3_get_d2i(3), X509_verify_cert(3)
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