From aa4d426b4d3527d7e166df1a05058c9a4a0f6683 Mon Sep 17 00:00:00 2001
From: Wojtek Kosior <wk@koszkonutek-tmp.pl.eu.org>
Date: Fri, 30 Apr 2021 00:33:56 +0200
Subject: initial/final commit

---
 openssl-1.1.0h/crypto/rsa/rsa_crpt.c | 178 +++++++++++++++++++++++++++++++++++
 1 file changed, 178 insertions(+)
 create mode 100644 openssl-1.1.0h/crypto/rsa/rsa_crpt.c

(limited to 'openssl-1.1.0h/crypto/rsa/rsa_crpt.c')

diff --git a/openssl-1.1.0h/crypto/rsa/rsa_crpt.c b/openssl-1.1.0h/crypto/rsa/rsa_crpt.c
new file mode 100644
index 0000000..9cd733b
--- /dev/null
+++ b/openssl-1.1.0h/crypto/rsa/rsa_crpt.c
@@ -0,0 +1,178 @@
+/*
+ * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include <openssl/crypto.h>
+#include "internal/cryptlib.h"
+#include <openssl/lhash.h>
+#include "internal/bn_int.h"
+#include <openssl/rand.h>
+#include "rsa_locl.h"
+
+int RSA_bits(const RSA *r)
+{
+    return (BN_num_bits(r->n));
+}
+
+int RSA_size(const RSA *r)
+{
+    return (BN_num_bytes(r->n));
+}
+
+int RSA_public_encrypt(int flen, const unsigned char *from, unsigned char *to,
+                       RSA *rsa, int padding)
+{
+    return (rsa->meth->rsa_pub_enc(flen, from, to, rsa, padding));
+}
+
+int RSA_private_encrypt(int flen, const unsigned char *from,
+                        unsigned char *to, RSA *rsa, int padding)
+{
+    return (rsa->meth->rsa_priv_enc(flen, from, to, rsa, padding));
+}
+
+int RSA_private_decrypt(int flen, const unsigned char *from,
+                        unsigned char *to, RSA *rsa, int padding)
+{
+    return (rsa->meth->rsa_priv_dec(flen, from, to, rsa, padding));
+}
+
+int RSA_public_decrypt(int flen, const unsigned char *from, unsigned char *to,
+                       RSA *rsa, int padding)
+{
+    return (rsa->meth->rsa_pub_dec(flen, from, to, rsa, padding));
+}
+
+int RSA_flags(const RSA *r)
+{
+    return ((r == NULL) ? 0 : r->meth->flags);
+}
+
+void RSA_blinding_off(RSA *rsa)
+{
+    BN_BLINDING_free(rsa->blinding);
+    rsa->blinding = NULL;
+    rsa->flags &= ~RSA_FLAG_BLINDING;
+    rsa->flags |= RSA_FLAG_NO_BLINDING;
+}
+
+int RSA_blinding_on(RSA *rsa, BN_CTX *ctx)
+{
+    int ret = 0;
+
+    if (rsa->blinding != NULL)
+        RSA_blinding_off(rsa);
+
+    rsa->blinding = RSA_setup_blinding(rsa, ctx);
+    if (rsa->blinding == NULL)
+        goto err;
+
+    rsa->flags |= RSA_FLAG_BLINDING;
+    rsa->flags &= ~RSA_FLAG_NO_BLINDING;
+    ret = 1;
+ err:
+    return (ret);
+}
+
+static BIGNUM *rsa_get_public_exp(const BIGNUM *d, const BIGNUM *p,
+                                  const BIGNUM *q, BN_CTX *ctx)
+{
+    BIGNUM *ret = NULL, *r0, *r1, *r2;
+
+    if (d == NULL || p == NULL || q == NULL)
+        return NULL;
+
+    BN_CTX_start(ctx);
+    r0 = BN_CTX_get(ctx);
+    r1 = BN_CTX_get(ctx);
+    r2 = BN_CTX_get(ctx);
+    if (r2 == NULL)
+        goto err;
+
+    if (!BN_sub(r1, p, BN_value_one()))
+        goto err;
+    if (!BN_sub(r2, q, BN_value_one()))
+        goto err;
+    if (!BN_mul(r0, r1, r2, ctx))
+        goto err;
+
+    ret = BN_mod_inverse(NULL, d, r0, ctx);
+ err:
+    BN_CTX_end(ctx);
+    return ret;
+}
+
+BN_BLINDING *RSA_setup_blinding(RSA *rsa, BN_CTX *in_ctx)
+{
+    BIGNUM *e;
+    BN_CTX *ctx;
+    BN_BLINDING *ret = NULL;
+
+    if (in_ctx == NULL) {
+        if ((ctx = BN_CTX_new()) == NULL)
+            return 0;
+    } else
+        ctx = in_ctx;
+
+    BN_CTX_start(ctx);
+    e = BN_CTX_get(ctx);
+    if (e == NULL) {
+        RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_MALLOC_FAILURE);
+        goto err;
+    }
+
+    if (rsa->e == NULL) {
+        e = rsa_get_public_exp(rsa->d, rsa->p, rsa->q, ctx);
+        if (e == NULL) {
+            RSAerr(RSA_F_RSA_SETUP_BLINDING, RSA_R_NO_PUBLIC_EXPONENT);
+            goto err;
+        }
+    } else
+        e = rsa->e;
+
+    if ((RAND_status() == 0) && rsa->d != NULL
+        && bn_get_words(rsa->d) != NULL) {
+        /*
+         * if PRNG is not properly seeded, resort to secret exponent as
+         * unpredictable seed
+         */
+        RAND_add(bn_get_words(rsa->d), bn_get_dmax(rsa->d) * sizeof(BN_ULONG),
+                 0.0);
+    }
+
+    {
+        BIGNUM *n = BN_new();
+
+        if (n == NULL) {
+            RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_MALLOC_FAILURE);
+            goto err;
+        }
+        BN_with_flags(n, rsa->n, BN_FLG_CONSTTIME);
+
+        ret = BN_BLINDING_create_param(NULL, e, n, ctx, rsa->meth->bn_mod_exp,
+                                       rsa->_method_mod_n);
+        /* We MUST free n before any further use of rsa->n */
+        BN_free(n);
+    }
+    if (ret == NULL) {
+        RSAerr(RSA_F_RSA_SETUP_BLINDING, ERR_R_BN_LIB);
+        goto err;
+    }
+
+    BN_BLINDING_set_current_thread(ret);
+
+ err:
+    BN_CTX_end(ctx);
+    if (ctx != in_ctx)
+        BN_CTX_free(ctx);
+    if (e != rsa->e)
+        BN_free(e);
+
+    return ret;
+}
-- 
cgit v1.2.3