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#pragma once
#include <openssl/bio.h>
#include <openssl/dh.h>
#include <openssl/dsa.h>
#include <openssl/dsa.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#include <openssl/pem.h>
#include <openssl/rand.h>
#include <openssl/rsa.h>
#include <openssl/ssl.h>
namespace ensuressl {
static void init_openssl(void);
static void cleanup_openssl(void);
static EVP_PKEY *create_rsa_key(void);
static void handle_openssl_error(void);
inline bool verify_openssl_key_cert(const std::string &filepath) {
bool private_key_valid = false;
bool cert_valid = false;
FILE *file = fopen(filepath.c_str(), "r");
if (file != NULL) {
EVP_PKEY *pkey = PEM_read_PrivateKey(file, NULL, NULL, NULL);
int rc;
if (pkey) {
int type = EVP_PKEY_type(pkey->type);
switch (type) {
case EVP_PKEY_RSA:
case EVP_PKEY_RSA2: {
RSA *rsa = EVP_PKEY_get1_RSA(pkey);
rc = RSA_check_key(rsa);
if (rc == 1) {
private_key_valid = true;
}
// RSA_free(rsa);
break;
}
default:
break;
}
if (private_key_valid) {
X509 *x509 = PEM_read_X509(file, NULL, NULL, NULL);
unsigned long err = ERR_get_error();
rc = X509_verify(x509, pkey);
err = ERR_get_error();
if (err == 0 && rc == 1) {
cert_valid = true;
}
}
EVP_PKEY_free(pkey);
}
fclose(file);
}
return cert_valid;
}
inline void generate_ssl_certificate(const std::string &filepath) {
EVP_PKEY *pPrivKey = NULL;
FILE *pFile = NULL;
init_openssl();
pPrivKey = create_rsa_key();
// Use this code to directly generate a certificate
X509 *x509;
x509 = X509_new();
if (x509) {
// TODO get actually random int
ASN1_INTEGER_set(X509_get_serialNumber(x509), 1584);
// not before this moment
X509_gmtime_adj(X509_get_notBefore(x509), 0);
// Cert is valid for 10 years
X509_gmtime_adj(X509_get_notAfter(x509), 60L * 60L * 24L * 365L * 10L);
// set the public key to the key we just generated
X509_set_pubkey(x509, pPrivKey);
// Get the subject name
X509_NAME *name;
name = X509_get_subject_name(x509);
X509_NAME_add_entry_by_txt(name, "C", MBSTRING_ASC, (unsigned char *)"US", -1, -1, 0);
X509_NAME_add_entry_by_txt(name, "O", MBSTRING_ASC, (unsigned char *)"Intel BMC", -1, -1, 0);
X509_NAME_add_entry_by_txt(name, "CN", MBSTRING_ASC, (unsigned char *)"testhost", -1, -1, 0);
// set the CSR options
X509_set_issuer_name(x509, name);
// Sign the certificate with our private key
X509_sign(x509, pPrivKey, EVP_sha256());
pFile = fopen(filepath.c_str(), "wt");
if (pFile) {
PEM_write_PrivateKey(pFile, pPrivKey, NULL, NULL, 0, 0, NULL);
PEM_write_X509(pFile, x509);
fclose(pFile);
pFile = NULL;
}
X509_free(x509);
}
if (pPrivKey) {
EVP_PKEY_free(pPrivKey);
pPrivKey = NULL;
}
// cleanup_openssl();
}
EVP_PKEY *create_rsa_key(void) {
RSA *pRSA = NULL;
EVP_PKEY *pKey = NULL;
pRSA = RSA_generate_key(2048, RSA_3, NULL, NULL);
pKey = EVP_PKEY_new();
if (pRSA && pKey && EVP_PKEY_assign_RSA(pKey, pRSA)) {
/* pKey owns pRSA from now */
if (RSA_check_key(pRSA) <= 0) {
fprintf(stderr, "RSA_check_key failed.\n");
handle_openssl_error();
EVP_PKEY_free(pKey);
pKey = NULL;
}
} else {
handle_openssl_error();
if (pRSA) {
RSA_free(pRSA);
pRSA = NULL;
}
if (pKey) {
EVP_PKEY_free(pKey);
pKey = NULL;
}
}
return pKey;
}
void init_openssl(void) {
if (SSL_library_init()) {
SSL_load_error_strings();
OpenSSL_add_all_algorithms();
RAND_load_file("/dev/urandom", 1024);
} else
exit(EXIT_FAILURE);
}
void cleanup_openssl(void) {
CRYPTO_cleanup_all_ex_data();
ERR_free_strings();
ERR_remove_thread_state(0);
EVP_cleanup();
}
void handle_openssl_error(void) { ERR_print_errors_fp(stderr); }
inline void ensure_openssl_key_present_and_valid(const std::string &filepath) {
bool pem_file_valid = false;
pem_file_valid = verify_openssl_key_cert(filepath);
if (!pem_file_valid) {
generate_ssl_certificate(filepath);
}
}
}
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