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Diffstat (limited to 'secure/lib/libcrypto/man/man3/EC_GFp_simple_method.3')
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diff --git a/secure/lib/libcrypto/man/man3/EC_GFp_simple_method.3 b/secure/lib/libcrypto/man/man3/EC_GFp_simple_method.3 new file mode 100644 index 000000000000..be5f0668c35c --- /dev/null +++ b/secure/lib/libcrypto/man/man3/EC_GFp_simple_method.3 @@ -0,0 +1,201 @@ +.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.39) +.\" +.\" Standard preamble: +.\" ======================================================================== +.de Sp \" Vertical space (when we can't use .PP) +.if t .sp .5v +.if n .sp +.. +.de Vb \" Begin verbatim text +.ft CW +.nf +.ne \\$1 +.. +.de Ve \" End verbatim text +.ft R +.fi +.. +.\" Set up some character translations and predefined strings. \*(-- will +.\" give an unbreakable dash, \*(PI will give pi, \*(L" will give a left +.\" double quote, and \*(R" will give a right double quote. \*(C+ will +.\" give a nicer C++. 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Always turn off hyphenation; it makes +.\" way too many mistakes in technical documents. +.if n .ad l +.nh +.SH "NAME" +EC_GFp_simple_method, EC_GFp_mont_method, EC_GFp_nist_method, EC_GFp_nistp224_method, EC_GFp_nistp256_method, EC_GFp_nistp521_method, EC_GF2m_simple_method, EC_METHOD_get_field_type \- Functions for obtaining EC_METHOD objects +.SH "SYNOPSIS" +.IX Header "SYNOPSIS" +.Vb 1 +\& #include <openssl/ec.h> +\& +\& const EC_METHOD *EC_GFp_simple_method(void); +\& const EC_METHOD *EC_GFp_mont_method(void); +\& const EC_METHOD *EC_GFp_nist_method(void); +\& const EC_METHOD *EC_GFp_nistp224_method(void); +\& const EC_METHOD *EC_GFp_nistp256_method(void); +\& const EC_METHOD *EC_GFp_nistp521_method(void); +\& +\& const EC_METHOD *EC_GF2m_simple_method(void); +\& +\& int EC_METHOD_get_field_type(const EC_METHOD *meth); +.Ve +.SH "DESCRIPTION" +.IX Header "DESCRIPTION" +The Elliptic Curve library provides a number of different implementations through a single common interface. +When constructing a curve using EC_GROUP_new (see \fBEC_GROUP_new\fR\|(3)) an +implementation method must be provided. The functions described here all return a const pointer to an +\&\fB\s-1EC_METHOD\s0\fR structure that can be passed to \s-1EC_GROUP_NEW.\s0 It is important that the correct implementation +type for the form of curve selected is used. +.PP +For F2^m curves there is only one implementation choice, i.e. EC_GF2_simple_method. +.PP +For Fp curves the lowest common denominator implementation is the EC_GFp_simple_method implementation. All +other implementations are based on this one. EC_GFp_mont_method builds on EC_GFp_simple_method but adds the +use of montgomery multiplication (see \fBBN_mod_mul_montgomery\fR\|(3)). EC_GFp_nist_method +offers an implementation optimised for use with \s-1NIST\s0 recommended curves (\s-1NIST\s0 curves are available through +EC_GROUP_new_by_curve_name as described in \fBEC_GROUP_new\fR\|(3)). +.PP +The functions EC_GFp_nistp224_method, EC_GFp_nistp256_method and EC_GFp_nistp521_method offer 64 bit +optimised implementations for the \s-1NIST P224, P256\s0 and P521 curves respectively. Note, however, that these +implementations are not available on all platforms. +.PP +EC_METHOD_get_field_type identifies what type of field the \s-1EC_METHOD\s0 structure supports, which will be either +F2^m or Fp. If the field type is Fp then the value \fBNID_X9_62_prime_field\fR is returned. If the field type is +F2^m then the value \fBNID_X9_62_characteristic_two_field\fR is returned. These values are defined in the +obj_mac.h header file. +.SH "RETURN VALUES" +.IX Header "RETURN VALUES" +All EC_GFp* functions and EC_GF2m_simple_method always return a const pointer to an \s-1EC_METHOD\s0 structure. +.PP +EC_METHOD_get_field_type returns an integer that identifies the type of field the \s-1EC_METHOD\s0 structure supports. +.SH "SEE ALSO" +.IX Header "SEE ALSO" +\&\fBcrypto\fR\|(7), \fBEC_GROUP_new\fR\|(3), \fBEC_GROUP_copy\fR\|(3), +\&\fBEC_POINT_new\fR\|(3), \fBEC_POINT_add\fR\|(3), \fBEC_KEY_new\fR\|(3), +\&\fBd2i_ECPKParameters\fR\|(3), +\&\fBBN_mod_mul_montgomery\fR\|(3) +.SH "COPYRIGHT" +.IX Header "COPYRIGHT" +Copyright 2013\-2017 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>. |