Vendor import of OpenSSH.

1 files changed, 169 insertions, 0 deletions

diff --git a/crypto/openssh/rsa.c b/crypto/openssh/rsa.c
new file mode 100644
index 0000000..5cab804
--- /dev/null
+++ b/crypto/openssh/rsa.c
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+/*
+ * 
+ * rsa.c
+ * 
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ * 
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ *                    All rights reserved
+ * 
+ * Created: Fri Mar  3 22:07:06 1995 ylo
+ * 
+ * Description of the RSA algorithm can be found e.g. from the following sources:
+ * 
+ *   Bruce Schneier: Applied Cryptography.  John Wiley & Sons, 1994.
+ * 
+ *   Jennifer Seberry and Josed Pieprzyk: Cryptography: An Introduction to
+ *   Computer Security.  Prentice-Hall, 1989.
+ * 
+ *   Man Young Rhee: Cryptography and Secure Data Communications.  McGraw-Hill,
+ *   1994.
+ * 
+ *   R. Rivest, A. Shamir, and L. M. Adleman: Cryptographic Communications
+ *   System and Method.  US Patent 4,405,829, 1983.
+ * 
+ *   Hans Riesel: Prime Numbers and Computer Methods for Factorization.
+ *   Birkhauser, 1994.
+ * 
+ *   The RSA Frequently Asked Questions document by RSA Data Security, Inc., 1995.
+ * 
+ *   RSA in 3 lines of perl by Adam Back <aba@atlax.ex.ac.uk>, 1995, as included
+ *   below:
+ * 
+ *     [gone - had to be deleted - what a pity]
+ * 
+*/
+
+#include "includes.h"
+RCSID("$Id: rsa.c,v 1.12 2000/02/21 21:47:31 markus Exp $");
+
+#include "rsa.h"
+#include "ssh.h"
+#include "xmalloc.h"
+
+int rsa_verbose = 1;
+
+int
+rsa_alive()
+{
+	RSA *key;
+
+	key = RSA_generate_key(32, 3, NULL, NULL);
+	if (key == NULL)
+		return (0);
+	RSA_free(key);
+	return (1);
+}
+
+/*
+ * 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.
+ */
+
+void
+rsa_generate_key(RSA *prv, RSA *pub, unsigned int bits)
+{
+	RSA *key;
+
+	if (rsa_verbose) {
+		printf("Generating RSA keys:  ");
+		fflush(stdout);
+	}
+	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");
+}
+
+void
+rsa_public_encrypt(BIGNUM *out, BIGNUM *in, RSA *key)
+{
+	char *inbuf, *outbuf;
+	int len, ilen, olen;
+
+	if (BN_num_bits(key->e) < 2 || !BN_is_odd(key->e))
+		fatal("rsa_public_encrypt() exponent too small or not odd");
+
+	olen = BN_num_bytes(key->n);
+	outbuf = xmalloc(olen);
+
+	ilen = BN_num_bytes(in);
+	inbuf = xmalloc(ilen);
+	BN_bn2bin(in, inbuf);
+
+	if ((len = RSA_public_encrypt(ilen, inbuf, outbuf, key,
+	    RSA_PKCS1_PADDING)) <= 0)
+		fatal("rsa_public_encrypt() failed");
+
+	BN_bin2bn(outbuf, len, out);
+
+	memset(outbuf, 0, olen);
+	memset(inbuf, 0, ilen);
+	xfree(outbuf);
+	xfree(inbuf);
+}
+
+void
+rsa_private_decrypt(BIGNUM *out, BIGNUM *in, RSA *key)
+{
+	char *inbuf, *outbuf;
+	int len, ilen, olen;
+
+	olen = BN_num_bytes(key->n);
+	outbuf = xmalloc(olen);
+
+	ilen = BN_num_bytes(in);
+	inbuf = xmalloc(ilen);
+	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);
+
+	memset(outbuf, 0, olen);
+	memset(inbuf, 0, ilen);
+	xfree(outbuf);
+	xfree(inbuf);
+}
+
+/* Set whether to output verbose messages during key generation. */
+
+void
+rsa_set_verbose(int verbose)
+{
+	rsa_verbose = verbose;
+}