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#include "ssh_pubkey_crypto.h"
#include <stdlib.h>
struct ssh_pubkey_t*
ssh_pubkey_new(enum pubkey_type t)
{
struct ssh_pubkey_t *k = (struct ssh_pubkey_t*)
malloc(sizeof(struct ssh_pubkey_t));
k->key_type = t;
switch (t) {
case SSH_RSA:
k->key.ssh_rsa = RSA_new();
}
return k;
}
void
ssh_pubkey_free(struct ssh_pubkey_t *k)
{
switch (k->key_type) {
case SSH_RSA:
RSA_free(k->key.ssh_rsa);
}
free(k);
}
static int
ssh_pubkey_encrypt_rsa(RSA *k, BIGNUM *out, BIGNUM *in)
{
size_t len, ilen, olen;
olen = RSA_size(k);
ilen = BN_num_bytes(in);
unsigned char outbuf[olen], inbuf[ilen];
BN_bn2bin(in, inbuf);
len = RSA_public_encrypt(ilen, inbuf, outbuf, k,
RSA_PKCS1_PADDING);
if (len <= 0) {
return -1;
}
BN_bin2bn(outbuf, len, out);
return 0;
}
int
ssh_pubkey_encrypt(struct ssh_pubkey_t *k, BIGNUM *out, BIGNUM *in)
{
switch (k->key_type) {
case SSH_RSA:
return ssh_pubkey_encrypt_rsa(k->key.ssh_rsa, out, in);
}
}
#ifndef HAVE_OPAQUE_STRUCTS
int
ssh_pubkey_setrsa(struct ssh_pubkey_t *k, BIGNUM *n, BIGNUM *e, BIGNUM *d)
{
RSA *r = k->key.ssh_rsa;
r->n = n;
r->e = e;
r->d = d;
return 0;
}
int
ssh_pubkey_getrsa(struct ssh_pubkey_t *k, const BIGNUM **n, const BIGNUM **e, const BIGNUM **d)
{
RSA *r = k->key.ssh_rsa;
*n = r->n;
*e = r->e;
*d = r->d;
return 0;
}
#endif
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