+/* $OpenBSD: rsa.c,v 1.29 2006/11/06 21:25:28 markus Exp $ */
/*
* Author: Tatu Ylonen <ylo@cs.hut.fi>
* Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
*/
#include "includes.h"
-RCSID("$OpenBSD: rsa.c,v 1.23 2001/06/27 05:42:24 markus Exp $");
+#include <sys/types.h>
+
+#include <stdarg.h>
+#include <string.h>
+
+#include "xmalloc.h"
#include "rsa.h"
#include "log.h"
-#include "xmalloc.h"
void
rsa_public_encrypt(BIGNUM *out, BIGNUM *in, RSA *key)
RSA_PKCS1_PADDING)) <= 0)
fatal("rsa_public_encrypt() failed");
- BN_bin2bn(outbuf, len, out);
+ if (BN_bin2bn(outbuf, len, out) == NULL)
+ fatal("rsa_public_encrypt: BN_bin2bn failed");
memset(outbuf, 0, olen);
memset(inbuf, 0, ilen);
RSA_PKCS1_PADDING)) <= 0) {
error("rsa_private_decrypt() failed");
} else {
- BN_bin2bn(outbuf, len, out);
+ if (BN_bin2bn(outbuf, len, out) == NULL)
+ fatal("rsa_private_decrypt: BN_bin2bn failed");
}
memset(outbuf, 0, olen);
memset(inbuf, 0, ilen);
return len;
}
+/* calculate p-1 and q-1 */
void
rsa_generate_additional_parameters(RSA *rsa)
{
BIGNUM *aux;
BN_CTX *ctx;
- /* Generate additional parameters */
- aux = BN_new();
- ctx = BN_CTX_new();
- BN_sub(aux, rsa->q, BN_value_one());
- BN_mod(rsa->dmq1, rsa->d, aux, 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->p, BN_value_one());
- BN_mod(rsa->dmp1, rsa->d, aux, ctx);
+ if ((BN_sub(aux, rsa->q, BN_value_one()) == 0) ||
+ (BN_mod(rsa->dmq1, rsa->d, aux, ctx) == 0) ||
+ (BN_sub(aux, rsa->p, BN_value_one()) == 0) ||
+ (BN_mod(rsa->dmp1, rsa->d, aux, ctx) == 0))
+ fatal("rsa_generate_additional_parameters: BN_sub/mod failed");
BN_clear_free(aux);
BN_CTX_free(ctx);