#include "crypto/dsa.h"
#include "dsa_local.h"
-static int dsa_builtin_keygen(OPENSSL_CTX *libctx, DSA *dsa);
+static int dsa_builtin_keygen(DSA *dsa);
int DSA_generate_key(DSA *dsa)
{
+#ifndef FIPS_MODE
if (dsa->meth->dsa_keygen != NULL)
return dsa->meth->dsa_keygen(dsa);
- return dsa_builtin_keygen(NULL, dsa);
+#endif
+ return dsa_builtin_keygen(dsa);
}
-int dsa_generate_key_ctx(OPENSSL_CTX *libctx, DSA *dsa)
+int dsa_generate_public_key(BN_CTX *ctx, const DSA *dsa, const BIGNUM *priv_key,
+ BIGNUM *pub_key)
{
-#ifndef FIPS_MODE
- if (dsa->meth->dsa_keygen != NULL)
- return dsa->meth->dsa_keygen(dsa);
-#endif
- return dsa_builtin_keygen(libctx, dsa);
+ int ret = 0;
+ BIGNUM *prk = BN_new();
+
+ if (prk == NULL)
+ return 0;
+ BN_with_flags(prk, priv_key, BN_FLG_CONSTTIME);
+
+ /* pub_key = g ^ priv_key mod p */
+ if (!BN_mod_exp(pub_key, dsa->params.g, prk, dsa->params.p, ctx))
+ goto err;
+ ret = 1;
+err:
+ BN_clear_free(prk);
+ return ret;
}
-static int dsa_builtin_keygen(OPENSSL_CTX *libctx, DSA *dsa)
+static int dsa_builtin_keygen(DSA *dsa)
{
int ok = 0;
BN_CTX *ctx = NULL;
BIGNUM *pub_key = NULL, *priv_key = NULL;
- if ((ctx = BN_CTX_new_ex(libctx)) == NULL)
+ if ((ctx = BN_CTX_new_ex(dsa->libctx)) == NULL)
goto err;
if (dsa->priv_key == NULL) {
pub_key = dsa->pub_key;
}
- {
- BIGNUM *prk = BN_new();
-
- if (prk == NULL)
- goto err;
- BN_with_flags(prk, priv_key, BN_FLG_CONSTTIME);
-
- /* pub_key = g ^ priv_key mod p */
- if (!BN_mod_exp(pub_key, dsa->params.g, prk, dsa->params.p, ctx)) {
- BN_free(prk);
- goto err;
- }
- /* We MUST free prk before any further use of priv_key */
- BN_free(prk);
- }
+ if (!dsa_generate_public_key(ctx, dsa, priv_key, pub_key))
+ goto err;
dsa->priv_key = priv_key;
dsa->pub_key = pub_key;