static int vb2_make_keypair()
{
struct vb2_private_key *privkey = 0;
struct vb2_public_key *pubkey = 0;
RSA *rsa_key = 0;
uint8_t *keyb_data = 0;
uint32_t keyb_size;
enum vb2_signature_algorithm sig_alg;
uint8_t *pubkey_buf = 0;
int has_priv = 0;
FILE *fp;
int ret = 1;
fp = fopen(infile, "rb");
if (!fp) {
fprintf(stderr, "Unable to open %s\n", infile);
goto done;
}
rsa_key = PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
if (!rsa_key) {
/* Check if the PEM contains only a public key */
fseek(fp, 0, SEEK_SET);
rsa_key = PEM_read_RSA_PUBKEY(fp, NULL, NULL, NULL);
}
fclose(fp);
if (!rsa_key) {
fprintf(stderr, "Unable to read RSA key from %s\n", infile);
goto done;
}
/* Public keys doesn't have the private exponent */
has_priv = !!rsa_key->d;
if (!has_priv)
fprintf(stderr, "%s has a public key only.\n", infile);
sig_alg = vb2_rsa_sig_alg(rsa_key);
if (sig_alg == VB2_SIG_INVALID) {
fprintf(stderr, "Unsupported sig algorithm in RSA key\n");
goto done;
}
if (has_priv) {
/* Create the private key */
privkey = calloc(1, sizeof(*privkey));
if (!privkey) {
fprintf(stderr, "Unable to allocate the private key\n");
goto done;
}
privkey->rsa_private_key = rsa_key;
privkey->sig_alg = sig_alg;
privkey->hash_alg = opt_hash_alg;
if (opt_desc && vb2_private_key_set_desc(privkey, opt_desc)) {
fprintf(stderr, "Unable to set the private key description\n");
goto done;
}
}
/* Create the public key */
if (vb2_public_key_alloc(&pubkey, sig_alg)) {
fprintf(stderr, "Unable to allocate the public key\n");
goto done;
}
/* Extract the keyb blob */
if (vb_keyb_from_rsa(rsa_key, &keyb_data, &keyb_size)) {
fprintf(stderr, "Couldn't extract the public key\n");
goto done;
}
/*
* Copy the keyb blob to the public key's buffer, because that's where
* vb2_unpack_key_data() and vb2_public_key_pack() expect to find it.
*/
pubkey_buf = vb2_public_key_packed_data(pubkey);
memcpy(pubkey_buf, keyb_data, keyb_size);
/* Fill in the internal struct pointers */
if (vb2_unpack_key_data(pubkey, pubkey_buf, keyb_size)) {
fprintf(stderr, "Unable to unpack the public key blob\n");
goto done;
}
pubkey->hash_alg = opt_hash_alg;
pubkey->version = opt_version;
if (opt_desc && vb2_public_key_set_desc(pubkey, opt_desc)) {
fprintf(stderr, "Unable to set pubkey description\n");
goto done;
}
/* Update the IDs */
if (!force_id) {
uint8_t *digest = DigestBuf(keyb_data, keyb_size,
SHA1_DIGEST_ALGORITHM);
memcpy(&opt_id, digest, sizeof(opt_id));
free(digest);
}
memcpy((struct vb2_id *)pubkey->id, &opt_id, sizeof(opt_id));
/* Write them out */
if (has_priv) {
privkey->id = opt_id;
strcpy(outext, ".vbprik2");
if (vb2_private_key_write(privkey, outfile)) {
fprintf(stderr, "unable to write private key\n");
goto done;
}
fprintf(stderr, "wrote %s\n", outfile);
}
strcpy(outext, ".vbpubk2");
if (vb2_public_key_write(pubkey, outfile)) {
fprintf(stderr, "unable to write public key\n");
goto done;
}
fprintf(stderr, "wrote %s\n", outfile);
ret = 0;
done:
RSA_free(rsa_key);
if (privkey) /* prevent double-free */
privkey->rsa_private_key = 0;
vb2_private_key_free(privkey);
vb2_public_key_free(pubkey);
free(keyb_data);
return ret;
}
static int vb2_make_keypair()
{
struct vb2_private_key *privkey = 0;
struct vb2_public_key *pubkey = 0;
RSA *rsa_key = 0;
uint8_t *keyb_data = 0;
uint32_t keyb_size;
enum vb2_signature_algorithm sig_alg;
uint8_t *pubkey_buf = 0;
FILE *fp;
int ret = 1;
fp = fopen(infile, "rb");
if (!fp) {
fprintf(stderr, "Unable to open %s\n", infile);
goto done;
}
rsa_key = PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
fclose(fp);
if (!rsa_key) {
fprintf(stderr, "Unable to read RSA key from %s\n", infile);
goto done;
}
sig_alg = vb2_rsa_sig_alg(rsa_key);
if (sig_alg == VB2_SIG_INVALID) {
fprintf(stderr, "Unsupported sig algorithm in RSA key\n");
goto done;
}
/* Create the private key */
privkey = calloc(1, sizeof(*privkey));
if (!privkey) {
fprintf(stderr, "Unable to allocate the private key\n");
goto done;
}
privkey->rsa_private_key = rsa_key;
privkey->sig_alg = sig_alg;
privkey->hash_alg = opt_hash_alg;
privkey->guid = opt_guid;
if (opt_desc && vb2_private_key_set_desc(privkey, opt_desc)) {
fprintf(stderr, "Unable to set the private key description\n");
goto done;
}
/* Write it out */
strcpy(outext, ".vbprik2");
if (vb2_private_key_write(privkey, outfile)) {
fprintf(stderr, "unable to write private key\n");
goto done;
}
fprintf(stderr, "wrote %s\n", outfile);
/* Create the public key */
if (vb2_public_key_alloc(&pubkey, sig_alg)) {
fprintf(stderr, "Unable to allocate the public key\n");
goto done;
}
/* Extract the keyb blob */
if (vb_keyb_from_rsa(rsa_key, &keyb_data, &keyb_size)) {
fprintf(stderr, "Couldn't extract the public key\n");
goto done;
}
/*
* Copy the keyb blob to the public key's buffer, because that's where
* vb2_unpack_key_data() and vb2_public_key_pack() expect to find it.
*/
pubkey_buf = vb2_public_key_packed_data(pubkey);
memcpy(pubkey_buf, keyb_data, keyb_size);
/* Fill in the internal struct pointers */
if (vb2_unpack_key_data(pubkey, pubkey_buf, keyb_size)) {
fprintf(stderr, "Unable to unpack the public key blob\n");
goto done;
}
pubkey->hash_alg = opt_hash_alg;
pubkey->version = opt_version;
memcpy((struct vb2_guid *)pubkey->guid, &opt_guid, sizeof(opt_guid));
if (opt_desc && vb2_public_key_set_desc(pubkey, opt_desc)) {
fprintf(stderr, "Unable to set pubkey description\n");
goto done;
}
/* Write it out */
strcpy(outext, ".vbpubk2");
if (vb2_public_key_write(pubkey, outfile)) {
fprintf(stderr, "unable to write public key\n");
goto done;
}
fprintf(stderr, "wrote %s\n", outfile);
ret = 0;
done:
RSA_free(rsa_key);
if (privkey) /* prevent double-free */
privkey->rsa_private_key = 0;
vb2_private_key_free(privkey);
vb2_public_key_free(pubkey);
free(keyb_data);
return ret;
}