EVP_EC_gen¶

NAME¶

EVP_EC_gen, EVP_EC_affine2oct - EVP routines for EC keys

SYNOPSIS¶

#include <openssl/evp.h>

EVP_PKEY *EVP_EC_gen(const char *curve);
int EVP_EC_affine2oct(const BIGNUM *x, const BIGNUM *y, size_t field_len,
                      unsigned char **pbuf, size_t *pbsize);

DESCRIPTION¶

EVP_EC_gen() generates a new EC key pair on the given curve.

EVP_EC_affine2oct() converts affine coordinates x and y of an EC point to an octet string conforming to Sec. 2.3.4 of the SECG SEC 1 ("Elliptic Curve Cryptography") standard. This octet string can further be passed to OSSL_PARAM_BLD_push_octet_string(). The length of the field degree representation (in bytes) must be passed to field_len. The function allocates a buffer for octet string and places a pointer to *pbuf. It's the caller's responsibility to free this buffer with OPENSSL_free().

RETURN VALUES¶

EVP_EC_gen() returns the EC key pair generated or NULL on error.

EVP_EC_affine2oct() returns 1 on success or 0 on error.

HISTORY¶

EVP_EC_gen() was added in OpenSSL 3.0.

EVP_EC_affine2oct() was added in OpenSSL 4.1.

COPYRIGHT¶

Licensed under the Apache License 2.0 (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 https://www.openssl.org/source/license.html.