D7net
Home
Console
Upload
information
Create File
Create Folder
About
Tools
:
/
proc
/
self
/
root
/
opt
/
alt
/
openssl
/
share
/
man
/
man3
/
Filename :
EC_KEY_get0_group.3ssl
back
Copy
.\" Automatically generated by Pod::Man 4.11 (Pod::Simple 3.35) .\" .\" 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++. Capital omega is used to do unbreakable dashes and .\" therefore won't be available. \*(C` and \*(C' expand to `' in nroff, .\" nothing in troff, for use with C<>. .tr \(*W- .ds C+ C\v'-.1v'\h'-1p'\s-2+\h'-1p'+\s0\v'.1v'\h'-1p' .ie n \{\ . ds -- \(*W- . ds PI pi . if (\n(.H=4u)&(1m=24u) .ds -- \(*W\h'-12u'\(*W\h'-12u'-\" diablo 10 pitch . if (\n(.H=4u)&(1m=20u) .ds -- \(*W\h'-12u'\(*W\h'-8u'-\" diablo 12 pitch . ds L" "" . ds R" "" . ds C` "" . ds C' "" 'br\} .el\{\ . ds -- \|\(em\| . ds PI \(*p . ds L" `` . ds R" '' . ds C` . ds C' 'br\} .\" .\" Escape single quotes in literal strings from groff's Unicode transform. .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" .\" If the F register is >0, we'll generate index entries on stderr for .\" titles (.TH), headers (.SH), subsections (.SS), items (.Ip), and index .\" entries marked with X<> in POD. Of course, you'll have to process the .\" output yourself in some meaningful fashion. .\" .\" Avoid warning from groff about undefined register 'F'. .de IX .. .nr rF 0 .if \n(.g .if rF .nr rF 1 .if (\n(rF:(\n(.g==0)) \{\ . if \nF \{\ . de IX . tm Index:\\$1\t\\n%\t"\\$2" .. . if !\nF==2 \{\ . nr % 0 . nr F 2 . \} . \} .\} .rr rF .\" .\" Accent mark definitions (@(#)ms.acc 1.5 88/02/08 SMI; from UCB 4.2). .\" Fear. Run. Save yourself. No user-serviceable parts. . \" fudge factors for nroff and troff .if n \{\ . ds #H 0 . ds #V .8m . ds #F .3m . ds #[ \f1 . ds #] \fP .\} .if t \{\ . ds #H ((1u-(\\\\n(.fu%2u))*.13m) . ds #V .6m . ds #F 0 . ds #[ \& . ds #] \& .\} . \" simple accents for nroff and troff .if n \{\ . ds ' \& . ds ` \& . ds ^ \& . ds , \& . ds ~ ~ . ds / .\} .if t \{\ . ds ' \\k:\h'-(\\n(.wu*8/10-\*(#H)'\'\h"|\\n:u" . ds ` \\k:\h'-(\\n(.wu*8/10-\*(#H)'\`\h'|\\n:u' . ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'^\h'|\\n:u' . ds , \\k:\h'-(\\n(.wu*8/10)',\h'|\\n:u' . ds ~ \\k:\h'-(\\n(.wu-\*(#H-.1m)'~\h'|\\n:u' . ds / \\k:\h'-(\\n(.wu*8/10-\*(#H)'\z\(sl\h'|\\n:u' .\} . \" troff and (daisy-wheel) nroff accents .ds : \\k:\h'-(\\n(.wu*8/10-\*(#H+.1m+\*(#F)'\v'-\*(#V'\z.\h'.2m+\*(#F'.\h'|\\n:u'\v'\*(#V' .ds 8 \h'\*(#H'\(*b\h'-\*(#H' .ds o \\k:\h'-(\\n(.wu+\w'\(de'u-\*(#H)/2u'\v'-.3n'\*(#[\z\(de\v'.3n'\h'|\\n:u'\*(#] .ds d- \h'\*(#H'\(pd\h'-\w'~'u'\v'-.25m'\f2\(hy\fP\v'.25m'\h'-\*(#H' .ds D- D\\k:\h'-\w'D'u'\v'-.11m'\z\(hy\v'.11m'\h'|\\n:u' .ds th \*(#[\v'.3m'\s+1I\s-1\v'-.3m'\h'-(\w'I'u*2/3)'\s-1o\s+1\*(#] .ds Th \*(#[\s+2I\s-2\h'-\w'I'u*3/5'\v'-.3m'o\v'.3m'\*(#] .ds ae a\h'-(\w'a'u*4/10)'e .ds Ae A\h'-(\w'A'u*4/10)'E . \" corrections for vroff .if v .ds ~ \\k:\h'-(\\n(.wu*9/10-\*(#H)'\s-2\u~\d\s+2\h'|\\n:u' .if v .ds ^ \\k:\h'-(\\n(.wu*10/11-\*(#H)'\v'-.4m'^\v'.4m'\h'|\\n:u' . \" for low resolution devices (crt and lpr) .if \n(.H>23 .if \n(.V>19 \ \{\ . ds : e . ds 8 ss . ds o a . ds d- d\h'-1'\(ga . ds D- D\h'-1'\(hy . ds th \o'bp' . ds Th \o'LP' . ds ae ae . ds Ae AE .\} .rm #[ #] #H #V #F C .\" ======================================================================== .\" .IX Title "EC_KEY_new 3" .TH EC_KEY_new 3 "2019-12-20" "1.0.2u" "OpenSSL" .\" For nroff, turn off justification. Always turn off hyphenation; it makes .\" way too many mistakes in technical documents. .if n .ad l .nh .SH "NAME" EC_KEY_new, EC_KEY_get_flags, EC_KEY_set_flags, EC_KEY_clear_flags, EC_KEY_new_by_curve_name, EC_KEY_free, EC_KEY_copy, EC_KEY_dup, EC_KEY_up_ref, EC_KEY_get0_group, EC_KEY_set_group, EC_KEY_get0_private_key, EC_KEY_set_private_key, EC_KEY_get0_public_key, EC_KEY_set_public_key, EC_KEY_get_enc_flags, EC_KEY_set_enc_flags, EC_KEY_get_conv_form, EC_KEY_set_conv_form, EC_KEY_get_key_method_data, EC_KEY_insert_key_method_data, EC_KEY_set_asn1_flag, EC_KEY_precompute_mult, EC_KEY_generate_key, EC_KEY_check_key, EC_KEY_set_public_key_affine_coordinates \- Functions for creating, destroying and manipulating EC_KEY objects. .SH "SYNOPSIS" .IX Header "SYNOPSIS" .Vb 2 \& #include <openssl/ec.h> \& #include <openssl/bn.h> \& \& EC_KEY *EC_KEY_new(void); \& int EC_KEY_get_flags(const EC_KEY *key); \& void EC_KEY_set_flags(EC_KEY *key, int flags); \& void EC_KEY_clear_flags(EC_KEY *key, int flags); \& EC_KEY *EC_KEY_new_by_curve_name(int nid); \& void EC_KEY_free(EC_KEY *key); \& EC_KEY *EC_KEY_copy(EC_KEY *dst, const EC_KEY *src); \& EC_KEY *EC_KEY_dup(const EC_KEY *src); \& int EC_KEY_up_ref(EC_KEY *key); \& const EC_GROUP *EC_KEY_get0_group(const EC_KEY *key); \& int EC_KEY_set_group(EC_KEY *key, const EC_GROUP *group); \& const BIGNUM *EC_KEY_get0_private_key(const EC_KEY *key); \& int EC_KEY_set_private_key(EC_KEY *key, const BIGNUM *prv); \& const EC_POINT *EC_KEY_get0_public_key(const EC_KEY *key); \& int EC_KEY_set_public_key(EC_KEY *key, const EC_POINT *pub); \& point_conversion_form_t EC_KEY_get_conv_form(const EC_KEY *key); \& void EC_KEY_set_conv_form(EC_KEY *eckey, point_conversion_form_t cform); \& void *EC_KEY_get_key_method_data(EC_KEY *key, \& void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)); \& void EC_KEY_insert_key_method_data(EC_KEY *key, void *data, \& void *(*dup_func)(void *), void (*free_func)(void *), void (*clear_free_func)(void *)); \& void EC_KEY_set_asn1_flag(EC_KEY *eckey, int asn1_flag); \& int EC_KEY_precompute_mult(EC_KEY *key, BN_CTX *ctx); \& int EC_KEY_generate_key(EC_KEY *key); \& int EC_KEY_check_key(const EC_KEY *key); \& int EC_KEY_set_public_key_affine_coordinates(EC_KEY *key, BIGNUM *x, BIGNUM *y); .Ve .SH "DESCRIPTION" .IX Header "DESCRIPTION" An \s-1EC_KEY\s0 represents a public key and (optionaly) an associated private key. A new \s-1EC_KEY\s0 (with no associated curve) can be constructed by calling EC_KEY_new. The reference count for the newly created \s-1EC_KEY\s0 is initially set to 1. A curve can be associated with the \s-1EC_KEY\s0 by calling EC_KEY_set_group. .PP Alternatively a new \s-1EC_KEY\s0 can be constructed by calling EC_KEY_new_by_curve_name and supplying the nid of the associated curve. Refer to \fBEC_GROUP_new\fR\|(3) for a description of curve names. This function simply wraps calls to EC_KEY_new and EC_GROUP_new_by_curve_name. .PP Calling EC_KEY_free decrements the reference count for the \s-1EC_KEY\s0 object, and if it has dropped to zero then frees the memory associated with it. .PP EC_KEY_copy copies the contents of the \s-1EC_KEY\s0 in \fBsrc\fR into \fBdest\fR. .PP EC_KEY_dup creates a new \s-1EC_KEY\s0 object and copies \fBec_key\fR into it. .PP EC_KEY_up_ref increments the reference count associated with the \s-1EC_KEY\s0 object. .PP EC_KEY_generate_key generates a new public and private key for the supplied \fBeckey\fR object. \fBeckey\fR must have an \s-1EC_GROUP\s0 object associated with it before calling this function. The private key is a random integer (0 < priv_key < order, where order is the order of the \s-1EC_GROUP\s0 object). The public key is an \s-1EC_POINT\s0 on the curve calculated by multiplying the generator for the curve by the private key. .PP EC_KEY_check_key performs various sanity checks on the \s-1EC_KEY\s0 object to confirm that it is valid. .PP EC_KEY_set_public_key_affine_coordinates sets the public key for \fBkey\fR based on its affine co-ordinates, i.e. it constructs an \s-1EC_POINT\s0 object based on the supplied \fBx\fR and \fBy\fR values and sets the public key to be this \s-1EC_POINT.\s0 It will also performs certain sanity checks on the key to confirm that it is valid. .PP The functions EC_KEY_get0_group, EC_KEY_set_group, EC_KEY_get0_private_key, EC_KEY_set_private_key, EC_KEY_get0_public_key, and EC_KEY_set_public_key get and set the \s-1EC_GROUP\s0 object, the private key and the \s-1EC_POINT\s0 public key for the \fBkey\fR respectively. .PP The functions EC_KEY_get_conv_form and EC_KEY_set_conv_form get and set the point_conversion_form for the \fBkey\fR. For a description of point_conversion_forms please refer to \fBEC_POINT_new\fR\|(3). .PP EC_KEY_insert_key_method_data and EC_KEY_get_key_method_data enable the caller to associate arbitrary additional data specific to the elliptic curve scheme being used with the \s-1EC_KEY\s0 object. This data is treated as a \*(L"black box\*(R" by the ec library. The data to be stored by EC_KEY_insert_key_method_data is provided in the \fBdata\fR parameter, which must have associated functions for duplicating, freeing and \*(L"clear_freeing\*(R" the data item. If a subsequent EC_KEY_get_key_method_data call is issued, the functions for duplicating, freeing and \*(L"clear_freeing\*(R" the data item must be provided again, and they must be the same as they were when the data item was inserted. .PP EC_KEY_set_flags sets the flags in the \fBflags\fR parameter on the \s-1EC_KEY\s0 object. Any flags that are already set are left set. The currently defined standard flags are \s-1EC_FLAG_NON_FIPS_ALLOW\s0 and \s-1EC_FLAG_FIPS_CHECKED.\s0 In addition there is the flag \s-1EC_FLAG_COFACTOR_ECDH\s0 which is specific to \s-1ECDH\s0 and is defined in ecdh.h. EC_KEY_get_flags returns the current flags that are set for this \s-1EC_KEY.\s0 EC_KEY_clear_flags clears the flags indicated by the \fBflags\fR parameter. All other flags are left in their existing state. .PP EC_KEY_set_asn1_flag sets the asn1_flag on the underlying \s-1EC_GROUP\s0 object (if set). Refer to \fBEC_GROUP_copy\fR\|(3) for further information on the asn1_flag. .PP EC_KEY_precompute_mult stores multiples of the underlying \s-1EC_GROUP\s0 generator for faster point multiplication. See also \fBEC_POINT_add\fR\|(3). .SH "RETURN VALUES" .IX Header "RETURN VALUES" EC_KEY_new, EC_KEY_new_by_curve_name and EC_KEY_dup return a pointer to the newly created \s-1EC_KEY\s0 object, or \s-1NULL\s0 on error. .PP EC_KEY_get_flags returns the flags associated with the \s-1EC_KEY\s0 object as an integer. .PP EC_KEY_copy returns a pointer to the destination key, or \s-1NULL\s0 on error. .PP EC_KEY_up_ref, EC_KEY_set_group, EC_KEY_set_private_key, EC_KEY_set_public_key, EC_KEY_precompute_mult, EC_KEY_generate_key, EC_KEY_check_key and EC_KEY_set_public_key_affine_coordinates return 1 on success or 0 on error. .PP EC_KEY_get0_group returns the \s-1EC_GROUP\s0 associated with the \s-1EC_KEY.\s0 .PP EC_KEY_get0_private_key returns the private key associated with the \s-1EC_KEY.\s0 .PP EC_KEY_get_conv_form return the point_conversion_form for the \s-1EC_KEY.\s0 .SH "SEE ALSO" .IX Header "SEE ALSO" \&\fBcrypto\fR\|(3), \fBec\fR\|(3), \fBEC_GROUP_new\fR\|(3), \&\fBEC_GROUP_copy\fR\|(3), \fBEC_POINT_new\fR\|(3), \&\fBEC_POINT_add\fR\|(3), \&\fBEC_GFp_simple_method\fR\|(3), \&\fBd2i_ECPKParameters\fR\|(3)