/* add a key to a secret keyring */
int
__ops_add_to_secring(__ops_keyring_t *keyring, const __ops_seckey_t *seckey)
{
const __ops_pubkey_t *pubkey;
__ops_key_t *key;
if (__ops_get_debug_level(__FILE__)) {
fprintf(stderr, "__ops_add_to_secring\n");
}
if (keyring->keyc > 0) {
key = &keyring->keys[keyring->keyc - 1];
if (__ops_get_debug_level(__FILE__) &&
key->key.pubkey.alg == OPS_PKA_DSA &&
seckey->pubkey.alg == OPS_PKA_ELGAMAL) {
fprintf(stderr, "__ops_add_to_secring: found elgamal seckey\n");
}
}
EXPAND_ARRAY(keyring, key);
key = &keyring->keys[keyring->keyc++];
(void) memset(key, 0x0, sizeof(*key));
pubkey = &seckey->pubkey;
__ops_keyid(key->sigid, OPS_KEY_ID_SIZE, pubkey, keyring->hashtype);
__ops_fingerprint(&key->sigfingerprint, pubkey, keyring->hashtype);
key->type = OPS_PTAG_CT_SECRET_KEY;
key->key.seckey = *seckey;
if (__ops_get_debug_level(__FILE__)) {
fprintf(stderr, "__ops_add_to_secring: keyc %u\n", keyring->keyc);
}
return 1;
}
/* add a key to a public keyring */
int
__ops_add_to_pubring(__ops_keyring_t *keyring, const __ops_pubkey_t *pubkey, __ops_content_enum tag)
{
__ops_key_t *key;
time_t duration;
if (__ops_get_debug_level(__FILE__)) {
fprintf(stderr, "__ops_add_to_pubring (type %u)\n", tag);
}
switch(tag) {
case OPS_PTAG_CT_PUBLIC_KEY:
EXPAND_ARRAY(keyring, key);
key = &keyring->keys[keyring->keyc++];
duration = key->key.pubkey.duration;
(void) memset(key, 0x0, sizeof(*key));
key->type = tag;
__ops_keyid(key->sigid, OPS_KEY_ID_SIZE, pubkey, keyring->hashtype);
__ops_fingerprint(&key->sigfingerprint, pubkey, keyring->hashtype);
key->key.pubkey = *pubkey;
key->key.pubkey.duration = duration;
return 1;
case OPS_PTAG_CT_PUBLIC_SUBKEY:
/* subkey is not the first */
key = &keyring->keys[keyring->keyc - 1];
__ops_keyid(key->encid, OPS_KEY_ID_SIZE, pubkey, keyring->hashtype);
duration = key->key.pubkey.duration;
(void) memcpy(&key->enckey, pubkey, sizeof(key->enckey));
key->enckey.duration = duration;
return 1;
default:
return 0;
}
}
/**
\ingroup HighLevel_KeyGenerate
\brief Generates an RSA keypair
\param numbits Modulus size
\param e Public Exponent
\param keydata Pointer to keydata struct to hold new key
\return 1 if key generated successfully; otherwise 0
\note It is the caller's responsibility to call __ops_keydata_free(keydata)
*/
static unsigned
rsa_generate_keypair(__ops_key_t *keydata,
const int numbits,
const unsigned long e,
const char *hashalg,
const char *cipher)
{
__ops_seckey_t *seckey;
RSA *rsa;
BN_CTX *ctx;
__ops_output_t *output;
__ops_memory_t *mem;
ctx = BN_CTX_new();
__ops_keydata_init(keydata, OPS_PTAG_CT_SECRET_KEY);
seckey = __ops_get_writable_seckey(keydata);
/* generate the key pair */
rsa = RSA_generate_key(numbits, e, NULL, NULL);
/* populate __ops key from ssl key */
seckey->pubkey.version = OPS_V4;
seckey->pubkey.birthtime = time(NULL);
seckey->pubkey.days_valid = 0;
seckey->pubkey.alg = OPS_PKA_RSA;
seckey->pubkey.key.rsa.n = BN_dup(rsa->n);
seckey->pubkey.key.rsa.e = BN_dup(rsa->e);
seckey->s2k_usage = OPS_S2KU_ENCRYPTED_AND_HASHED;
seckey->s2k_specifier = OPS_S2KS_SALTED;
/* seckey->s2k_specifier=OPS_S2KS_SIMPLE; */
if ((seckey->hash_alg = __ops_str_to_hash_alg(hashalg)) == OPS_HASH_UNKNOWN) {
seckey->hash_alg = OPS_HASH_SHA1;
}
seckey->alg = __ops_str_to_cipher(cipher);
seckey->octetc = 0;
seckey->checksum = 0;
seckey->key.rsa.d = BN_dup(rsa->d);
seckey->key.rsa.p = BN_dup(rsa->p);
seckey->key.rsa.q = BN_dup(rsa->q);
seckey->key.rsa.u = BN_mod_inverse(NULL, rsa->p, rsa->q, ctx);
if (seckey->key.rsa.u == NULL) {
(void) fprintf(stderr, "seckey->key.rsa.u is NULL\n");
return 0;
}
BN_CTX_free(ctx);
RSA_free(rsa);
__ops_keyid(keydata->sigid, OPS_KEY_ID_SIZE, &keydata->key.seckey.pubkey, seckey->hash_alg);
__ops_fingerprint(&keydata->sigfingerprint, &keydata->key.seckey.pubkey, seckey->hash_alg);
/* Generate checksum */
output = NULL;
mem = NULL;
__ops_setup_memory_write(&output, &mem, 128);
__ops_push_checksum_writer(output, seckey);
switch (seckey->pubkey.alg) {
case OPS_PKA_DSA:
return __ops_write_mpi(output, seckey->key.dsa.x);
case OPS_PKA_RSA:
case OPS_PKA_RSA_ENCRYPT_ONLY:
case OPS_PKA_RSA_SIGN_ONLY:
if (!__ops_write_mpi(output, seckey->key.rsa.d) ||
!__ops_write_mpi(output, seckey->key.rsa.p) ||
!__ops_write_mpi(output, seckey->key.rsa.q) ||
!__ops_write_mpi(output, seckey->key.rsa.u)) {
return 0;
}
break;
case OPS_PKA_ELGAMAL:
return __ops_write_mpi(output, seckey->key.elgamal.x);
default:
(void) fprintf(stderr, "Bad seckey->pubkey.alg\n");
return 0;
}
/* close rather than pop, since its the only one on the stack */
__ops_writer_close(output);
__ops_teardown_memory_write(output, mem);
/* should now have checksum in seckey struct */
/* test */
if (__ops_get_debug_level(__FILE__)) {
test_seckey(seckey);
}
return 1;
}