+/* $OpenBSD: rsa.c,v 1.28 2006/08/03 03:34:42 deraadt Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
* software must be clearly marked as such, and if the derived work is
* incompatible with the protocol description in the RFC file, it must be
* called by a name other than "ssh" or "Secure Shell".
- *
+ *
*
* Copyright (c) 1999 Niels Provos. All rights reserved.
*
*/
#include "includes.h"
-RCSID("$OpenBSD: rsa.c,v 1.16 2000/09/07 20:27:53 deraadt Exp $");
-
-#include "rsa.h"
-#include "ssh.h"
-#include "xmalloc.h"
-#include "entropy.h"
-
-int rsa_verbose = 1;
-
-int
-rsa_alive()
-{
- RSA *key;
-
- seed_rng();
- key = RSA_generate_key(32, 3, NULL, NULL);
- if (key == NULL)
- return (0);
- RSA_free(key);
- return (1);
-}
-
-/*
- * Key generation progress meter callback
- */
-void
-keygen_progress(int p, int n, void *arg)
-{
- const char progress_chars[] = ".o+O?";
-
- if ((p < 0) || (p > (sizeof(progress_chars) - 2)))
- p = sizeof(progress_chars) - 2;
- putchar(progress_chars[p]);
- fflush(stdout);
-}
+#include <sys/types.h>
-/*
- * Generates RSA public and private keys. This initializes the data
- * structures; they should be freed with rsa_clear_private_key and
- * rsa_clear_public_key.
- */
+#include <string.h>
-void
-rsa_generate_key(RSA *prv, RSA *pub, unsigned int bits)
-{
- RSA *key;
-
- seed_rng();
-
- if (rsa_verbose) {
- printf("Generating RSA keys: ");
- fflush(stdout);
- key = RSA_generate_key(bits, 35, keygen_progress, NULL);
- printf("\n");
- } else {
- key = RSA_generate_key(bits, 35, NULL, NULL);
- }
- if (key == NULL)
- fatal("rsa_generate_key: key generation failed.");
-
- /* Copy public key parameters */
- pub->n = BN_new();
- BN_copy(pub->n, key->n);
- pub->e = BN_new();
- BN_copy(pub->e, key->e);
-
- /* Copy private key parameters */
- prv->n = BN_new();
- BN_copy(prv->n, key->n);
- prv->e = BN_new();
- BN_copy(prv->e, key->e);
- prv->d = BN_new();
- BN_copy(prv->d, key->d);
- prv->p = BN_new();
- BN_copy(prv->p, key->p);
- prv->q = BN_new();
- BN_copy(prv->q, key->q);
-
- prv->dmp1 = BN_new();
- BN_copy(prv->dmp1, key->dmp1);
-
- prv->dmq1 = BN_new();
- BN_copy(prv->dmq1, key->dmq1);
-
- prv->iqmp = BN_new();
- BN_copy(prv->iqmp, key->iqmp);
-
- RSA_free(key);
-
- if (rsa_verbose)
- printf("Key generation complete.\n");
-}
+#include "xmalloc.h"
+#include "rsa.h"
+#include "log.h"
void
rsa_public_encrypt(BIGNUM *out, BIGNUM *in, RSA *key)
{
- unsigned char *inbuf, *outbuf;
+ u_char *inbuf, *outbuf;
int len, ilen, olen;
if (BN_num_bits(key->e) < 2 || !BN_is_odd(key->e))
xfree(inbuf);
}
-void
+int
rsa_private_decrypt(BIGNUM *out, BIGNUM *in, RSA *key)
{
- unsigned char *inbuf, *outbuf;
+ u_char *inbuf, *outbuf;
int len, ilen, olen;
olen = BN_num_bytes(key->n);
BN_bn2bin(in, inbuf);
if ((len = RSA_private_decrypt(ilen, inbuf, outbuf, key,
- RSA_PKCS1_PADDING)) <= 0)
- fatal("rsa_private_decrypt() failed");
-
- BN_bin2bn(outbuf, len, out);
-
+ RSA_PKCS1_PADDING)) <= 0) {
+ error("rsa_private_decrypt() failed");
+ } else {
+ BN_bin2bn(outbuf, len, out);
+ }
memset(outbuf, 0, olen);
memset(inbuf, 0, ilen);
xfree(outbuf);
xfree(inbuf);
+ return len;
}
-/* Set whether to output verbose messages during key generation. */
-
+/* calculate p-1 and q-1 */
void
-rsa_set_verbose(int verbose)
+rsa_generate_additional_parameters(RSA *rsa)
{
- rsa_verbose = verbose;
+ BIGNUM *aux;
+ BN_CTX *ctx;
+
+ if ((aux = BN_new()) == NULL)
+ fatal("rsa_generate_additional_parameters: BN_new failed");
+ if ((ctx = BN_CTX_new()) == NULL)
+ fatal("rsa_generate_additional_parameters: BN_CTX_new failed");
+
+ BN_sub(aux, rsa->q, BN_value_one());
+ BN_mod(rsa->dmq1, rsa->d, aux, ctx);
+
+ BN_sub(aux, rsa->p, BN_value_one());
+ BN_mod(rsa->dmp1, rsa->d, aux, ctx);
+
+ BN_clear_free(aux);
+ BN_CTX_free(ctx);
}
+