#include <openssl/evp.h> int EVP_PKEY_set1_encoded_public_key(EVP_PKEY *pkey, const unsigned char *pub, size_t publen); size_t EVP_PKEY_get1_encoded_public_key(EVP_PKEY *pkey, unsigned char **ppub);
The following functions have been deprecated since OpenSSL 3.0, and can be hidden entirely by defining OPENSSL_API_COMPAT with a suitable version value, see openssl_user_macros(7):
int EVP_PKEY_set1_tls_encodedpoint(EVP_PKEY *pkey, const unsigned char *pt, size_t ptlen); size_t EVP_PKEY_get1_tls_encodedpoint(EVP_PKEY *pkey, unsigned char **ppt);
The format for the encoded public key will depend on the algorithm in use. For DH it should be encoded as a positive integer in big-endian form. For EC is should be a point conforming to Sec. 2.3.4 of the SECG SEC 1 (``Elliptic Curve Cryptography'') standard. For X25519 and X448 it should be encoded in a format as defined by RFC7748.
The key to be updated is supplied in pkey. The buffer containing the encoded key is pointed to be pub. The length of the buffer is supplied in publen.
EVP_PKEY_get1_encoded_public_key() does the equivalent operation except that the encoded public key is returned to the application. The key containing the public key data is supplied in pkey. A buffer containing the encoded key will be allocated and stored in *ppub. The length of the encoded public key is returned by the function. The application is responsible for freeing the allocated buffer.
The macro EVP_PKEY_set1_tls_encodedpoint() is deprecated and simply calls EVP_PKEY_set1_encoded_public_key() with all the same arguments. New applications should use EVP_PKEY_set1_encoded_public_key() instead.
The macro EVP_PKEY_get1_tls_encodedpoint() is deprecated and simply calls EVP_PKEY_get1_encoded_public_key() with all the same arguments. New applications should use EVP_PKEY_get1_encoded_public_key() instead.
EVP_PKEY_get1_encoded_public_key() returns the length of the encoded key or 0 for failure.
#include <openssl/evp.h> int exchange(EVP_PKEY *ourkey, unsigned char *peer_pub, size_t peer_pub_len) { EVP_PKEY *peerkey = EVP_PKEY_new(); if (peerkey == NULL || EVP_PKEY_copy_parameters(peerkey, ourkey) <= 0) return 0; if (EVP_PKEY_set1_encoded_public_key(peerkey, peer_pub, peer_pub_len) <= 0) return 0; /* Do the key exchange here */ EVP_PKEY_free(peerkey); return 1; }
#include <openssl/evp.h> int get_encoded_pub_key(EVP_PKEY *ourkey) { unsigned char *pubkey; size_t pubkey_len; pubkey_len = EVP_PKEY_get1_encoded_public_key(ourkey, &pubkey); if (pubkey_len == 0) return 0; /* * Send the encoded public key stored in the buffer at "pubkey" and of * length pubkey_len, to the peer. */ OPENSSL_free(pubkey); return 1; }
EVP_PKEY_set1_tls_encodedpoint() and EVP_PKEY_get1_tls_encodedpoint() were deprecated in OpenSSL 3.0.
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>.