EVP_PKEY *d2i_PUBKEY(EVP_PKEY **a, const unsigned char **pp, long length)
{
X509_PUBKEY *xpk;
EVP_PKEY *pktmp;
const unsigned char *q;
q = *pp;
xpk = d2i_X509_PUBKEY(NULL, &q, length);
if (!xpk)
return NULL;
pktmp = X509_PUBKEY_get(xpk);
X509_PUBKEY_free(xpk);
if (!pktmp)
return NULL;
*pp = q;
if (a) {
EVP_PKEY_free(*a);
*a = pktmp;
}
return pktmp;
}
EVP_PKEY *
cga_der2key(uint8_t *dk, int klen)
{
EVP_PKEY *k;
X509_PUBKEY *xpk;
if ((xpk = d2i_X509_PUBKEY(NULL,
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
(const unsigned char **)
#endif
&dk, klen))
== NULL) {
applog(LOG_ERR, "%s: d2i failed", __FUNCTION__);
return (NULL);
}
k = X509_PUBKEY_get(xpk);
X509_PUBKEY_free(xpk);
return (k);
}
OP_STATUS CryptoSignature_impl::SetPublicKey(const UINT8* public_key, int key_length)
{
if (!public_key || key_length <= 0)
return OpStatus::ERR_OUT_OF_RANGE;
// This function supports public keys in different formats, such as
// X509_PUBKEY and EVP_PKEY-with-RSA-key-only objects.
// It should be made more generic, simple and straightforward:
// only EVP_PKEY objects should be supported.
// This function tries to decode data at "public_key" pointer as X509_PUBKEY,
// if fails - as EVP_PKEY_RSA.
// Clear the existing key, if any.
if (m_keyspec)
{
EVP_PKEY_free(m_keyspec);
m_keyspec = NULL;
}
// Try hypothesis: public key is X509_PUBKEY.
// Temporary variable as recommended by "man d2i_X509".
const unsigned char* public_key_tmp = public_key;
// Construct X509_PUBKEY object. We own it.
X509_PUBKEY* pubkey = d2i_X509_PUBKEY(NULL, &public_key_tmp, key_length);
if (pubkey)
{
m_keyspec = X509_PUBKEY_get(pubkey);
// X509_PUBKEY_get allocates new EVP_PKEY, so it's safe
// to deallocate pubkey now.
X509_PUBKEY_free(pubkey);
}
ERR_clear_error();
// Try hypothesis: public key is EVP_PKEY_RSA.
if (m_keyspec == NULL)
{
switch (m_cipher_algorithm )
{
case CRYPTO_CIPHER_TYPE_RSA:
// Temporary variable my have changed its value, resetting.
public_key_tmp = public_key;
m_keyspec = d2i_PublicKey(EVP_PKEY_RSA, NULL, &public_key_tmp, key_length);
ERR_clear_error();
break;
default:
return OpStatus::ERR_NOT_SUPPORTED;
}
}
if (m_keyspec)
return OpStatus::OK;
return OpStatus::ERR;
}
