from small one page howto to huge articles all in one place
 

search text in:





Poll
Which screen resolution do you use?










poll results

Last additions:
using iotop to find disk usage hogs

using iotop to find disk usage hogs

words:

887

views:

101608

userrating:

average rating: 1.7 (84 votes) (1=very good 6=terrible)


May 25th. 2007:
Words

486

Views

216580

why adblockers are bad


Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

Workaround and fixes for the current Core Dump Handling vulnerability affected kernels

words:

161

views:

97422

userrating:

average rating: 1.3 (28 votes) (1=very good 6=terrible)


April, 26th. 2006:

Druckversion
You are here: manpages





d2i_ECPKParameters

Section: OpenSSL (3)
Updated: 2015-01-22
Index Return to Main Contents
 

NAME

d2i_ECPKParameters, i2d_ECPKParameters, d2i_ECPKParameters_bio, i2d_ECPKParameters_bio, d2i_ECPKParameters_fp, i2d_ECPKParameters_fp(fp,x), ECPKParameters_print, ECPKParameters_print_fp - Functions for decoding and encoding ASN1 representations of elliptic curve entities  

SYNOPSIS

 #include <openssl/ec.h>

 EC_GROUP *d2i_ECPKParameters(EC_GROUP **px, const unsigned char **in, long len);
 int i2d_ECPKParameters(const EC_GROUP *x, unsigned char **out);
 #define d2i_ECPKParameters_bio(bp,x) ASN1_d2i_bio_of(EC_GROUP,NULL,d2i_ECPKParameters,bp,x)
 #define i2d_ECPKParameters_bio(bp,x) ASN1_i2d_bio_of_const(EC_GROUP,i2d_ECPKParameters,bp,x)
 #define d2i_ECPKParameters_fp(fp,x) (EC_GROUP *)ASN1_d2i_fp(NULL, \
                (char *(*)())d2i_ECPKParameters,(fp),(unsigned char **)(x))
 #define i2d_ECPKParameters_fp(fp,x) ASN1_i2d_fp(i2d_ECPKParameters,(fp), \
                (unsigned char *)(x))
 int     ECPKParameters_print(BIO *bp, const EC_GROUP *x, int off);
 int     ECPKParameters_print_fp(FILE *fp, const EC_GROUP *x, int off);

 

DESCRIPTION

The ECPKParameters encode and decode routines encode and parse the public parameters for an EC_GROUP structure, which represents a curve.

d2i_ECPKParameters() attempts to decode len bytes at *in. If successful a pointer to the EC_GROUP structure is returned. If an error occurred then NULL is returned. If px is not NULL then the returned structure is written to *px. If *px is not NULL then it is assumed that *px contains a valid EC_GROUP structure and an attempt is made to reuse it. If the call is successful *in is incremented to the byte following the parsed data.

i2d_ECPKParameters() encodes the structure pointed to by x into DER format. If out is not NULL is writes the DER encoded data to the buffer at *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.

If *out is NULL memory will be allocated for a buffer and the encoded data written to it. In this case *out is not incremented and it points to the start of the data just written.

d2i_ECPKParameters_bio() is similar to d2i_ECPKParameters() except it attempts to parse data from BIO bp.

d2i_ECPKParameters_fp() is similar to d2i_ECPKParameters() except it attempts to parse data from FILE pointer fp.

i2d_ECPKParameters_bio() is similar to i2d_ECPKParameters() except it writes the encoding of the structure x to BIO bp and it returns 1 for success and 0 for failure.

i2d_ECPKParameters_fp() is similar to i2d_ECPKParameters() except it writes the encoding of the structure x to BIO bp and it returns 1 for success and 0 for failure.

These functions are very similar to the X509 functions described in d2i_X509(3), where further notes and examples are available.

The ECPKParameters_print and ECPKParameters_print_fp functions print a human-readable output of the public parameters of the EC_GROUP to bp or fp. The output lines are indented by off spaces.  

RETURN VALUES

d2i_ECPKParameters(), d2i_ECPKParameters_bio() and d2i_ECPKParameters_fp() return a valid EC_GROUP structure or NULL if an error occurs.

i2d_ECPKParameters() returns the number of bytes successfully encoded or a negative value if an error occurs.

i2d_ECPKParameters_bio(), i2d_ECPKParameters_fp(), ECPKParameters_print and ECPKParameters_print_fp return 1 for success and 0 if an error occurs.  

SEE ALSO

crypto(3), ec(3), EC_GROUP_new(3), EC_GROUP_copy(3), EC_POINT_new(3), EC_POINT_add(3), EC_KEY_new(3), EC_GFp_simple_method(3), d2i_X509(3)


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUES
SEE ALSO


Please read "Why adblockers are bad".



Other free services
toURL.org
Shorten long
URLs to short
links like
http://tourl.org/2
tourl.org
.
Reverse DNS lookup
Find out which hostname(s)
resolve to a
given IP or other hostnames for the server
www.reversednslookup.org
rdf newsfeed | rss newsfeed | Atom newsfeed
- Powered by LeopardCMS - Running on Gentoo -
Copyright 2004-2017 Sascha Nitsch Unternehmensberatung UG(haftungsbeschränkt)
Valid XHTML1.1 : Valid CSS : buttonmaker
- Level Triple-A Conformance to Web Content Accessibility Guidelines 1.0 -
- Copyright and legal notices -
Time to create this page: 44.7 ms