Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 584 insertions, 0 deletions

diff --git a/third_party/heimdal/lib/hcrypto/rsa-gmp.c b/third_party/heimdal/lib/hcrypto/rsa-gmp.c
new file mode 100644
index 0000000..8fb28ed
--- /dev/null
+++ b/third_party/heimdal/lib/hcrypto/rsa-gmp.c
@@ -0,0 +1,584 @@
+/*
+ * Copyright (c) 2006 - 2007 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <config.h>
+#include <roken.h>
+#include <krb5-types.h>
+#include <assert.h>
+
+#include <rsa.h>
+
+#ifdef HAVE_GMP
+
+#include <gmp.h>
+
+static void
+BN2mpz(mpz_t s, const BIGNUM *bn)
+{
+    size_t len;
+    void *p;
+
+    len = BN_num_bytes(bn);
+    p = malloc(len);
+    BN_bn2bin(bn, p);
+    mpz_init(s);
+    mpz_import(s, len, 1, 1, 1, 0, p);
+
+    free(p);
+}
+
+
+static BIGNUM *
+mpz2BN(mpz_t s)
+{
+    size_t size;
+    BIGNUM *bn;
+    void *p;
+
+    mpz_export(NULL, &size, 1, 1, 1, 0, s);
+    p = malloc(size);
+    if (p == NULL && size != 0)
+	return NULL;
+    mpz_export(p, &size, 1, 1, 1, 0, s);
+    bn = BN_bin2bn(p, size, NULL);
+    free(p);
+    return bn;
+}
+
+static int
+rsa_private_calculate(mpz_t in, mpz_t p,  mpz_t q,
+		      mpz_t dmp1, mpz_t dmq1, mpz_t iqmp,
+		      mpz_t out)
+{
+    mpz_t vp, vq, u;
+    mpz_init(vp); mpz_init(vq); mpz_init(u);
+
+    /* vq = c ^ (d mod (q - 1)) mod q */
+    /* vp = c ^ (d mod (p - 1)) mod p */
+    mpz_fdiv_r(vp, in, p);
+    mpz_powm(vp, vp, dmp1, p);
+    mpz_fdiv_r(vq, in, q);
+    mpz_powm(vq, vq, dmq1, q);
+
+    /* C2 = 1/q mod p  (iqmp) */
+    /* u = (vp - vq)C2 mod p. */
+    mpz_sub(u, vp, vq);
+#if 0
+    if (mp_int_compare_zero(&u) < 0)
+	mp_int_add(&u, p, &u);
+#endif
+    mpz_mul(u, iqmp, u);
+    mpz_fdiv_r(u, u, p);
+
+    /* c ^ d mod n = vq + u q */
+    mpz_mul(u, q, u);
+    mpz_add(out, u, vq);
+
+    mpz_clear(vp);
+    mpz_clear(vq);
+    mpz_clear(u);
+
+    return 0;
+}
+
+/*
+ *
+ */
+
+static int
+gmp_rsa_public_encrypt(int flen, const unsigned char* from,
+			unsigned char* to, RSA* rsa, int padding)
+{
+    unsigned char *p, *p0;
+    size_t size, padlen;
+    mpz_t enc, dec, n, e;
+
+    if (padding != RSA_PKCS1_PADDING)
+	return -1;
+
+    size = RSA_size(rsa);
+
+    if (size < RSA_PKCS1_PADDING_SIZE || size - RSA_PKCS1_PADDING_SIZE < flen)
+	return -2;
+
+    BN2mpz(n, rsa->n);
+    BN2mpz(e, rsa->e);
+
+    p = p0 = malloc(size - 1);
+    if (p0 == NULL) {
+	mpz_clear(e);
+	mpz_clear(n);
+	return -3;
+    }
+
+    padlen = size - flen - 3;
+    assert(padlen >= 8);
+
+    *p++ = 2;
+    if (RAND_bytes(p, padlen) != 1) {
+	mpz_clear(e);
+	mpz_clear(n);
+	free(p0);
+	return -4;
+    }
+    while(padlen) {
+	if (*p == 0)
+	    *p = 1;
+	padlen--;
+	p++;
+    }
+    *p++ = 0;
+    memcpy(p, from, flen);
+    p += flen;
+    assert((p - p0) == size - 1);
+
+    mpz_init(enc);
+    mpz_init(dec);
+    mpz_import(dec, size - 1, 1, 1, 1, 0, p0);
+    free(p0);
+
+    mpz_powm(enc, dec, e, n);
+
+    mpz_clear(dec);
+    mpz_clear(e);
+    mpz_clear(n);
+    {
+	size_t ssize;
+	mpz_export(to, &ssize, 1, 1, 1, 0, enc);
+	assert(size >= ssize);
+	size = ssize;
+    }
+    mpz_clear(enc);
+
+    return size;
+}
+
+static int
+gmp_rsa_public_decrypt(int flen, const unsigned char* from,
+			 unsigned char* to, RSA* rsa, int padding)
+{
+    unsigned char *p;
+    size_t size;
+    mpz_t s, us, n, e;
+
+    if (padding != RSA_PKCS1_PADDING)
+	return -1;
+
+    if (flen > RSA_size(rsa))
+	return -2;
+
+    BN2mpz(n, rsa->n);
+    BN2mpz(e, rsa->e);
+
+#if 0
+    /* Check that the exponent is larger then 3 */
+    if (mp_int_compare_value(&e, 3) <= 0) {
+	mp_int_clear(&n);
+	mp_int_clear(&e);
+	return -3;
+    }
+#endif
+
+    mpz_init(s);
+    mpz_init(us);
+    mpz_import(s, flen, 1, 1, 1, 0, rk_UNCONST(from));
+
+    if (mpz_cmp(s, n) >= 0) {
+	mpz_clear(n);
+	mpz_clear(e);
+	return -4;
+    }
+
+    mpz_powm(us, s, e, n);
+
+    mpz_clear(s);
+    mpz_clear(n);
+    mpz_clear(e);
+
+    p = to;
+
+    mpz_export(p, &size, 1, 1, 1, 0, us);
+    assert(size <= RSA_size(rsa));
+
+    mpz_clear(us);
+
+    /* head zero was skipped by mp_int_to_unsigned */
+    if (*p == 0)
+	return -6;
+    if (*p != 1)
+	return -7;
+    size--; p++;
+    while (size && *p == 0xff) {
+	size--; p++;
+    }
+    if (size == 0 || *p != 0)
+	return -8;
+    size--; p++;
+
+    memmove(to, p, size);
+
+    return size;
+}
+
+static int
+gmp_rsa_private_encrypt(int flen, const unsigned char* from,
+			  unsigned char* to, RSA* rsa, int padding)
+{
+    unsigned char *p, *p0;
+    size_t size;
+    mpz_t in, out, n, e;
+
+    if (padding != RSA_PKCS1_PADDING)
+	return -1;
+
+    size = RSA_size(rsa);
+
+    if (size < RSA_PKCS1_PADDING_SIZE || size - RSA_PKCS1_PADDING_SIZE < flen)
+	return -2;
+
+    p0 = p = malloc(size);
+    *p++ = 0;
+    *p++ = 1;
+    memset(p, 0xff, size - flen - 3);
+    p += size - flen - 3;
+    *p++ = 0;
+    memcpy(p, from, flen);
+    p += flen;
+    assert((p - p0) == size);
+
+    BN2mpz(n, rsa->n);
+    BN2mpz(e, rsa->e);
+
+    mpz_init(in);
+    mpz_init(out);
+    mpz_import(in, size, 1, 1, 1, 0, p0);
+    free(p0);
+
+#if 0
+    if(mp_int_compare_zero(&in) < 0 ||
+       mp_int_compare(&in, &n) >= 0) {
+	size = 0;
+	goto out;
+    }
+#endif
+
+    if (rsa->p && rsa->q && rsa->dmp1 && rsa->dmq1 && rsa->iqmp) {
+	mpz_t p, q, dmp1, dmq1, iqmp;
+
+	BN2mpz(p, rsa->p);
+	BN2mpz(q, rsa->q);
+	BN2mpz(dmp1, rsa->dmp1);
+	BN2mpz(dmq1, rsa->dmq1);
+	BN2mpz(iqmp, rsa->iqmp);
+
+	rsa_private_calculate(in, p, q, dmp1, dmq1, iqmp, out);
+
+	mpz_clear(p);
+	mpz_clear(q);
+	mpz_clear(dmp1);
+	mpz_clear(dmq1);
+	mpz_clear(iqmp);
+    } else {
+	mpz_t d;
+
+	BN2mpz(d, rsa->d);
+	mpz_powm(out, in, d, n);
+	mpz_clear(d);
+    }
+
+    {
+	size_t ssize;
+	mpz_export(to, &ssize, 1, 1, 1, 0, out);
+	assert(size >= ssize);
+	size = ssize;
+    }
+
+    mpz_clear(e);
+    mpz_clear(n);
+    mpz_clear(in);
+    mpz_clear(out);
+
+    return size;
+}
+
+static int
+gmp_rsa_private_decrypt(int flen, const unsigned char* from,
+			  unsigned char* to, RSA* rsa, int padding)
+{
+    unsigned char *ptr;
+    size_t size;
+    mpz_t in, out, n, e;
+
+    if (padding != RSA_PKCS1_PADDING)
+	return -1;
+
+    size = RSA_size(rsa);
+    if (flen > size)
+	return -2;
+
+    mpz_init(in);
+    mpz_init(out);
+
+    BN2mpz(n, rsa->n);
+    BN2mpz(e, rsa->e);
+
+    mpz_import(in, flen, 1, 1, 1, 0, from);
+
+    if(mpz_cmp_ui(in, 0) < 0 ||
+       mpz_cmp(in, n) >= 0) {
+	size = 0;
+	goto out;
+    }
+
+    if (rsa->p && rsa->q && rsa->dmp1 && rsa->dmq1 && rsa->iqmp) {
+	mpz_t p, q, dmp1, dmq1, iqmp;
+
+	BN2mpz(p, rsa->p);
+	BN2mpz(q, rsa->q);
+	BN2mpz(dmp1, rsa->dmp1);
+	BN2mpz(dmq1, rsa->dmq1);
+	BN2mpz(iqmp, rsa->iqmp);
+
+	rsa_private_calculate(in, p, q, dmp1, dmq1, iqmp, out);
+
+	mpz_clear(p);
+	mpz_clear(q);
+	mpz_clear(dmp1);
+	mpz_clear(dmq1);
+	mpz_clear(iqmp);
+    } else {
+	mpz_t d;
+
+#if 0
+	if(mp_int_compare_zero(&in) < 0 ||
+	   mp_int_compare(&in, &n) >= 0)
+	    return MP_RANGE;
+#endif
+
+	BN2mpz(d, rsa->d);
+	mpz_powm(out, in, d, n);
+	mpz_clear(d);
+    }
+
+    ptr = to;
+    {
+	size_t ssize;
+	mpz_export(ptr, &ssize, 1, 1, 1, 0, out);
+	assert(size >= ssize);
+	size = ssize;
+    }
+
+    /* head zero was skipped by mp_int_to_unsigned */
+    if (*ptr != 2)
+	return -3;
+    size--; ptr++;
+    while (size && *ptr != 0) {
+	size--; ptr++;
+    }
+    if (size == 0)
+	return -4;
+    size--; ptr++;
+
+    memmove(to, ptr, size);
+
+out:
+    mpz_clear(e);
+    mpz_clear(n);
+    mpz_clear(in);
+    mpz_clear(out);
+
+    return size;
+}
+
+static int
+random_num(mpz_t num, size_t len)
+{
+    unsigned char *p;
+
+    len = (len + 7) / 8;
+    p = malloc(len);
+    if (p == NULL)
+	return 1;
+    if (RAND_bytes(p, len) != 1) {
+	free(p);
+	return 1;
+    }
+    mpz_import(num, len, 1, 1, 1, 0, p);
+    free(p);
+    return 0;
+}
+
+
+static int
+gmp_rsa_generate_key(RSA *rsa, int bits, BIGNUM *e, BN_GENCB *cb)
+{
+    mpz_t el, p, q, n, d, dmp1, dmq1, iqmp, t1, t2, t3;
+    int counter, ret;
+
+    if (bits < 789)
+	return -1;
+
+    ret = -1;
+
+    mpz_init(el);
+    mpz_init(p);
+    mpz_init(q);
+    mpz_init(n);
+    mpz_init(d);
+    mpz_init(dmp1);
+    mpz_init(dmq1);
+    mpz_init(iqmp);
+    mpz_init(t1);
+    mpz_init(t2);
+    mpz_init(t3);
+
+    BN2mpz(el, e);
+
+    /* generate p and q so that p != q and bits(pq) ~ bits */
+
+    counter = 0;
+    do {
+	BN_GENCB_call(cb, 2, counter++);
+	random_num(p, bits / 2 + 1);
+	mpz_nextprime(p, p);
+
+	mpz_sub_ui(t1, p, 1);
+	mpz_gcd(t2, t1, el);
+    } while(mpz_cmp_ui(t2, 1) != 0);
+
+    BN_GENCB_call(cb, 3, 0);
+
+    counter = 0;
+    do {
+	BN_GENCB_call(cb, 2, counter++);
+	random_num(q, bits / 2 + 1);
+	mpz_nextprime(q, q);
+
+	mpz_sub_ui(t1, q, 1);
+	mpz_gcd(t2, t1, el);
+    } while(mpz_cmp_ui(t2, 1) != 0);
+
+    /* make p > q */
+    if (mpz_cmp(p, q) < 0)
+	mpz_swap(p, q);
+
+    BN_GENCB_call(cb, 3, 1);
+
+    /* calculate n,  		n = p * q */
+    mpz_mul(n, p, q);
+
+    /* calculate d, 		d = 1/e mod (p - 1)(q - 1) */
+    mpz_sub_ui(t1, p, 1);
+    mpz_sub_ui(t2, q, 1);
+    mpz_mul(t3, t1, t2);
+    mpz_invert(d, el, t3);
+
+    /* calculate dmp1		dmp1 = d mod (p-1) */
+    mpz_mod(dmp1, d, t1);
+    /* calculate dmq1		dmq1 = d mod (q-1) */
+    mpz_mod(dmq1, d, t2);
+    /* calculate iqmp 		iqmp = 1/q mod p */
+    mpz_invert(iqmp, q, p);
+
+    /* fill in RSA key */
+
+    rsa->e = mpz2BN(el);
+    rsa->p = mpz2BN(p);
+    rsa->q = mpz2BN(q);
+    rsa->n = mpz2BN(n);
+    rsa->d = mpz2BN(d);
+    rsa->dmp1 = mpz2BN(dmp1);
+    rsa->dmq1 = mpz2BN(dmq1);
+    rsa->iqmp = mpz2BN(iqmp);
+
+    ret = 1;
+
+    mpz_clear(el);
+    mpz_clear(p);
+    mpz_clear(q);
+    mpz_clear(n);
+    mpz_clear(d);
+    mpz_clear(dmp1);
+    mpz_clear(dmq1);
+    mpz_clear(iqmp);
+    mpz_clear(t1);
+    mpz_clear(t2);
+    mpz_clear(t3);
+
+    return ret;
+}
+
+static int
+gmp_rsa_init(RSA *rsa)
+{
+    return 1;
+}
+
+static int
+gmp_rsa_finish(RSA *rsa)
+{
+    return 1;
+}
+
+const RSA_METHOD hc_rsa_gmp_method = {
+    "hcrypto GMP RSA",
+    gmp_rsa_public_encrypt,
+    gmp_rsa_public_decrypt,
+    gmp_rsa_private_encrypt,
+    gmp_rsa_private_decrypt,
+    NULL,
+    NULL,
+    gmp_rsa_init,
+    gmp_rsa_finish,
+    0,
+    NULL,
+    NULL,
+    NULL,
+    gmp_rsa_generate_key
+};
+
+#endif /* HAVE_GMP */
+
+/**
+ * RSA implementation using Gnu Multipresistion Library.
+ */
+
+const RSA_METHOD *
+RSA_gmp_method(void)
+{
+#ifdef HAVE_GMP
+    return &hc_rsa_gmp_method;
+#else
+    return NULL;
+#endif
+}