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pki: Create pki_publickey_from_privatekey().

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This commit is contained in:
Andreas Schneider
2011-08-07 16:56:33 +02:00
parent f55cd7de43
commit 36ee2d3332
4 changed files with 216 additions and 185 deletions
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57
src/pki_crypto.c
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@@ -161,4 +161,61 @@ fail:
return NULL;
}
ssh_key pki_publickey_from_privatekey(ssh_key privkey) {
ssh_key pubkey = NULL;
if (privkey == NULL || !ssh_key_is_private(privkey)) {
return NULL;
}
pubkey = ssh_key_new();
if (pubkey == NULL) {
return NULL;
}
pubkey->type = privkey->type;
switch (pubkey->type) {
case SSH_KEYTYPE_DSS:
pubkey->dsa = DSA_new();
if (pubkey->dsa == NULL) {
goto fail;
}
pubkey->dsa->p = BN_dup(privkey->dsa->p);
pubkey->dsa->q = BN_dup(privkey->dsa->q);
pubkey->dsa->g = BN_dup(privkey->dsa->g);
pubkey->dsa->pub_key = BN_dup(privkey->dsa->pub_key);
if (pubkey->dsa->p == NULL ||
pubkey->dsa->q == NULL ||
pubkey->dsa->g == NULL ||
pubkey->dsa->pub_key == NULL) {
goto fail;
}
break;
case SSH_KEYTYPE_RSA:
case SSH_KEYTYPE_RSA1:
pubkey->rsa = RSA_new();
if (pubkey->rsa == NULL) {
goto fail;
}
pubkey->rsa->e = BN_dup(privkey->rsa->e);
pubkey->rsa->n = BN_dup(privkey->rsa->n);
if (pubkey->rsa->e == NULL ||
pubkey->rsa->n == NULL) {
goto fail;
}
break;
case SSH_KEYTYPE_ECDSA:
case SSH_KEYTYPE_UNKNOWN:
ssh_key_free(pubkey);
return NULL;
}
pubkey->type_c = ssh_key_type_to_char(privkey->type);
return pubkey;
fail:
ssh_key_free(pubkey);
return NULL;
}
#endif /* _PKI_CRYPTO_H */