Nid_x9_62_prime256v1

Low-level operations on elliptic curves.

Source code for pycoin.ecdsa.secp256r1. From.Generator import Generator from.native.openssl import createOpenSSLOptimizations, NIDX962prime256v1 p. Enable perfect forward secrecy with NIDX962prime256v1. Patch Instructions: To install this SUSE Recommended Update use the SUSE recommended installation methods like YaST onlineupdate or 'zypper patch'. Alternatively you can run the command listed for your product: SUSE Linux Enterprise Software Development Kit 12-SP3.

NIDX962prime256v1 curve. Writes the public key into a file (let the user choose the name). Then loads the peer public key from a file (let the user choose the name) 3. Derives a shared secret from the generated private key and the peer public key. Write a single source file and then try it by launching two different processes from the. NIDX962prime256v1 (aka NIST P-256) is default curve used in SecureMessage.Themis also can be re-compiled manually with p384 and p521 (need to change default curve in code and re-compile). prev in list next in list prev in thread next in thread List: openssl-dev Subject: Re: EVP and Elliptic curve From: Matt Caswell.

point_conversion_form_t enumerates forms, as defined in X9.62 (ECDSA), for the encoding of a elliptic curve point (x,y)

Nid_x9_62_prime256v1

EC_GROUP_new_by_curve_name returns a fresh EC_GROUP object for the elliptic curve specified by nid, or NULL on unsupported NID or allocation failure.

The supported NIDs are:
NID_secp224r1 (P-224),
NID_X9_62_prime256v1 (P-256),
NID_secp384r1 (P-384),
NID_secp521r1 (P-521)

If in doubt, use NID_X9_62_prime256v1, or see the curve25519.h header for more modern primitives.

EC_GROUP_dup takes a reference to a and returns it.

EC_GROUP_cmp returns zero if a and b are the same group and non-zero otherwise.

EC_GROUP_get0_generator returns a pointer to the internal EC_POINT object in group that specifies the generator for the group.

EC_GROUP_get0_order returns a pointer to the internal BIGNUM object in group that specifies the order of the group.

EC_GROUP_order_bits returns the number of bits of the order of group.

EC_GROUP_get_cofactor sets *cofactor to the cofactor of group using ctx, if it's not NULL. It returns one on success and zero otherwise.

EC_GROUP_get_curve_GFp gets various parameters about a group. It sets *out_p to the order of the coordinate field and *out_a and *out_b to the parameters of the curve when expressed as y² = x³ + ax + b. Any of the output parameters can be NULL. It returns one on success and zero on error.

EC_GROUP_get_curve_name returns a NID that identifies group.

EC_GROUP_get_degree returns the number of bits needed to represent an element of the field underlying group.

EC_curve_nid2nist returns the NIST name of the elliptic curve specified by nid, or NULL if nid is not a NIST curve. For example, it returns 'P-256' for NID_X9_62_prime256v1.

Nid_x9_62_prime256v1

EC_curve_nist2nid returns the NID of the elliptic curve specified by the NIST name name, or NID_undef if name is not a recognized name. For example, it returns NID_X9_62_prime256v1 for 'P-256'.

EC_POINT_new returns a fresh EC_POINT object in the given group, or NULL on error.

EC_POINT_free frees point and the data that it points to.

EC_POINT_copy sets *dest equal to *src. It returns one on success and zero otherwise.

EC_POINT_dup returns a fresh EC_POINT that contains the same values as src, or NULL on error.

Nid_x9_62_prime256v1 Openssl

EC_POINT_set_to_infinity sets point to be the 'point at infinity' for the given group.

EC_POINT_is_at_infinity returns one iff point is the point at infinity and zero otherwise.

EC_POINT_is_on_curve returns one if point is an element of group and and zero otherwise or when an error occurs. This is different from OpenSSL, which returns -1 on error. If ctx is non-NULL, it may be used.

EC_POINT_cmp returns zero if a is equal to b, greater than zero if not equal and -1 on error. If ctx is not NULL, it may be used.

EC_POINT_get_affine_coordinates_GFp sets x and y to the affine value of point using ctx, if it's not NULL. It returns one on success and zero otherwise.

Eitherx or y may be NULL to skip computing that coordinate. This is slightly faster in the common case where only the x-coordinate is needed.

EC_POINT_get_affine_coordinates is an alias of EC_POINT_get_affine_coordinates_GFp.

EC_POINT_set_affine_coordinates_GFp sets the value of point to be (x, y). The ctx argument may be used if not NULL. It returns one on success or zero on error. It's considered an error if the point is not on the curve.

Note that the corresponding function in OpenSSL versions prior to 1.0.2s does not check if the point is on the curve. This is a security-critical check, so code additionally supporting OpenSSL should repeat the check with EC_POINT_is_on_curve or check for older OpenSSL versions with OPENSSL_VERSION_NUMBER.

EC_POINT_set_affine_coordinates is an alias of EC_POINT_set_affine_coordinates_GFp.

EC_POINT_point2oct serialises point into the X9.62 form given by form into, at most, len bytes at buf. It returns the number of bytes written or zero on error if buf is non-NULL, else the number of bytes needed. The ctx argument may be used if not NULL.

EC_POINT_point2cbb behaves like EC_POINT_point2oct but appends the serialised point to cbb. It returns one on success and zero on error.

EC_POINT_oct2point sets point from len bytes of X9.62 format serialisation in buf. It returns one on success and zero on error. The ctx argument may be used if not NULL. It's considered an error if buf does not represent a point on the curve.

EC_POINT_set_compressed_coordinates_GFp sets point to equal the point with the given x coordinate and the y coordinate specified by y_bit (see X9.62). It returns one on success and zero otherwise.

Nid_x9_62_prime256v1

EC_POINT_add sets r equal to a plus b. It returns one on success and zero otherwise. If ctx is not NULL, it may be used.

EC_POINT_dbl sets r equal to a plus a. It returns one on success and zero otherwise. If ctx is not NULL, it may be used.

EC_POINT_invert sets a equal to minus a. It returns one on success and zero otherwise. If ctx is not NULL, it may be used.

EC_POINT_mul sets r = generator*n + q*m. It returns one on success and zero otherwise. If ctx is not NULL, it may be used.

EC_GROUP_new_curve_GFp creates a new, arbitrary elliptic curve group based on the equation y² = x³ + a·x + b. It returns the new group or NULL on error.

This new group has no generator. It is an error to use a generator-less group with any functions except for EC_GROUP_free, EC_POINT_new, EC_POINT_set_affine_coordinates_GFp, and EC_GROUP_set_generator.

EC_GROUPs returned by this function will always compare as unequal via EC_GROUP_cmp (even to themselves). EC_GROUP_get_curve_name will always return NID_undef.

Avoid using arbitrary curves and use EC_GROUP_new_by_curve_name instead.

EC_GROUP_set_generator sets the generator for group to generator, which must have the given order and cofactor. It may only be used with EC_GROUP objects returned by EC_GROUP_new_curve_GFp and may only be used once on each group. generator must have been created using group.

EC_GROUP_get_order sets *order to the order of group, if it's not NULL. It returns one on success and zero otherwise. ctx is ignored. Use EC_GROUP_get0_order instead.

EC_GROUP_get_asn1_flag returns OPENSSL_EC_NAMED_CURVE.

EC_GROUP_method_of returns a dummy non-NULL pointer.

Nid_x9_62_prime256v1

EC_METHOD_get_field_type returns NID_X9_62_prime_field.

EC_GROUP_set_point_conversion_form aborts the process if form is not POINT_CONVERSION_UNCOMPRESSED and otherwise does nothing.

EC_builtin_curve describes a supported elliptic curve.

Nid_x9_62_prime256v1

EC_get_builtin_curves writes at most max_num_curves elements to out_curves and returns the total number that it would have written, had max_num_curves been large enough.

Nid_x9_62_prime256v1

The EC_builtin_curve items describe the supported elliptic curves.