#include <openssl/x509.h>
- X509 *d2i_X509(X509 **px, const unsigned char **in, int len);
+ X509 *d2i_X509(X509 **px, const unsigned char **in, long len);
+ X509 *d2i_X509_AUX(X509 **px, const unsigned char **in, long len);
int i2d_X509(X509 *x, unsigned char **out);
+ int i2d_X509_AUX(X509 *x, unsigned char **out);
X509 *d2i_X509_bio(BIO *bp, X509 **x);
X509 *d2i_X509_fp(FILE *fp, X509 **x);
If the call is successful B<*in> is incremented to the byte following the
parsed data.
+d2i_X509_AUX() is similar to d2i_X509() 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() encodes the structure pointed to by B<x> into DER format.
If B<out> is not B<NULL> is writes the DER encoded data to the buffer
at B<*out>, and increments it to point after the data just written.
If the return value is negative an error occurred, otherwise it
returns the length of the encoded data.
-For OpenSSL 0.9.7 and later if B<*out> is B<NULL> memory will be
+If B<*out> is B<NULL> memory will be
allocated for a buffer and the encoded data written to it. In this
case B<*out> is not incremented and it points to the start of the
data just written.
+i2d_X509_AUX() is similar to i2d_X509(), 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, this is a non-standard OpenSSL-specific data format.
+
d2i_X509_bio() is similar to d2i_X509() except it attempts
to parse data from BIO B<bp>.
The encoded data is in binary form and may contain embedded zeroes.
Therefore any FILE pointers or BIOs should be opened in binary mode.
-Functions such as B<strlen()> will B<not> return the correct length
+Functions such as strlen() will B<not> return the correct length
of the encoded structure.
The ways that B<*in> and B<*out> are incremented after the operation
Allocate and encode the DER encoding of an X509 structure:
- int len;
- unsigned char *buf, *p;
-
- len = i2d_X509(x, NULL);
-
- buf = OPENSSL_malloc(len);
-
- if (buf == NULL)
- /* error */
-
- p = buf;
-
- i2d_X509(x, &p);
-
-If you are using OpenSSL 0.9.7 or later then this can be
-simplified to:
-
-
int len;
unsigned char *buf;
buf = NULL;
-
len = i2d_X509(x, &buf);
-
if (len < 0)
/* error */
Attempt to decode a buffer:
X509 *x;
-
unsigned char *buf, *p;
-
int len;
/* Something to setup buf and len */
-
p = buf;
-
x = d2i_X509(NULL, &p, len);
if (x == NULL)
Alternative technique:
X509 *x;
-
unsigned char *buf, *p;
-
int len;
/* Something to setup buf and len */
-
p = buf;
-
x = NULL;
- if(!d2i_X509(&x, &p, len))
+ if (!d2i_X509(&x, &p, len))
/* Some error */
unsigned char *buf;
len = i2d_X509(x, NULL);
-
buf = OPENSSL_malloc(len);
-
if (buf == NULL)
/* error */
i2d_X509(x, &buf);
-
/* Other stuff ... */
-
OPENSSL_free(buf);
This code will result in B<buf> apparently containing garbage because
it was incremented after the call to point after the data just written.
-Also B<buf> will no longer contain the pointer allocated by B<OPENSSL_malloc()>
-and the subsequent call to B<OPENSSL_free()> may well crash.
+Also B<buf> will no longer contain the pointer allocated by OPENSSL_malloc()
+and the subsequent call to OPENSSL_free() may well crash.
-The auto allocation feature (setting buf to NULL) only works on OpenSSL
-0.9.7 and later. Attempts to use it on earlier versions will typically
-cause a segmentation violation.
-
-Another trap to avoid is misuse of the B<xp> argument to B<d2i_X509()>:
+Another trap to avoid is misuse of the B<xp> argument to d2i_X509():
X509 *x;
if (!d2i_X509(&x, &p, len))
/* Some error */
-This will probably crash somewhere in B<d2i_X509()>. The reason for this
+This will probably crash somewhere in d2i_X509(). The reason for this
is that the variable B<x> is uninitialized and an attempt will be made to
interpret its (invalid) value as an B<X509> structure, typically causing
a segmentation violation. If B<x> is set to NULL first then this will not
=head1 SEE ALSO
L<ERR_get_error(3)>
+L<X509_CRL_get0_by_serial(3)>,
+L<X509_get0_signature(3)>,
+L<X509_get_ext_d2i(3)>,
+L<X509_get_extension_flags(3)>,
+L<X509_get_pubkey(3)>,
+L<X509_get_subject_name(3)>,
+L<X509_get_version(3)>,
+L<X509_NAME_add_entry_by_txt(3)>,
+L<X509_NAME_ENTRY_get_object(3)>,
+L<X509_NAME_get_index_by_NID(3)>,
+L<X509_NAME_print_ex(3)>,
+L<X509_new(3)>,
+L<X509_sign(3)>,
+L<X509V3_get_d2i(3)>,
+L<X509_verify_cert(3)>
+
+=cut
+
+=head1 COPYRIGHT
-=head1 HISTORY
+Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
-d2i_X509, i2d_X509, d2i_X509_bio, d2i_X509_fp, i2d_X509_bio and i2d_X509_fp
-are available in all versions of SSLeay and OpenSSL.
+Licensed under the OpenSSL license (the "License"). You may not use
+this file except in compliance with the License. You can obtain a copy
+in the file LICENSE in the source distribution or at
+L<https://www.openssl.org/source/license.html>.
=cut
projects / openssl.git / blobdiff