:-'Generic Commit'

dropshell-tool/openssl-1.1.1w/crypto/rsa/rsa_x931g.c

@@ -0,0 +1,198 @@
+/*
+ * Copyright 1995-2019 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 <string.h>
+#include <time.h>
+#include <openssl/err.h>
+#include <openssl/bn.h>
+#include "rsa_local.h"
+
+/* X9.31 RSA key derivation and generation */
+
+int RSA_X931_derive_ex(RSA *rsa, BIGNUM *p1, BIGNUM *p2, BIGNUM *q1,
+                       BIGNUM *q2, const BIGNUM *Xp1, const BIGNUM *Xp2,
+                       const BIGNUM *Xp, const BIGNUM *Xq1, const BIGNUM *Xq2,
+                       const BIGNUM *Xq, const BIGNUM *e, BN_GENCB *cb)
+{
+    BIGNUM *r0 = NULL, *r1 = NULL, *r2 = NULL, *r3 = NULL;
+    BN_CTX *ctx = NULL, *ctx2 = NULL;
+    int ret = 0;
+
+    if (!rsa)
+        goto err;
+
+    ctx = BN_CTX_new();
+    if (ctx == NULL)
+        goto err;
+    BN_CTX_start(ctx);
+
+    r0 = BN_CTX_get(ctx);
+    r1 = BN_CTX_get(ctx);
+    r2 = BN_CTX_get(ctx);
+    r3 = BN_CTX_get(ctx);
+
+    if (r3 == NULL)
+        goto err;
+    if (!rsa->e) {
+        rsa->e = BN_dup(e);
+        if (!rsa->e)
+            goto err;
+    } else {
+        e = rsa->e;
+    }
+
+    /*
+     * If not all parameters present only calculate what we can. This allows
+     * test programs to output selective parameters.
+     */
+
+    if (Xp && rsa->p == NULL) {
+        rsa->p = BN_new();
+        if (rsa->p == NULL)
+            goto err;
+
+        if (!BN_X931_derive_prime_ex(rsa->p, p1, p2,
+                                     Xp, Xp1, Xp2, e, ctx, cb))
+            goto err;
+    }
+
+    if (Xq && rsa->q == NULL) {
+        rsa->q = BN_new();
+        if (rsa->q == NULL)
+            goto err;
+        if (!BN_X931_derive_prime_ex(rsa->q, q1, q2,
+                                     Xq, Xq1, Xq2, e, ctx, cb))
+            goto err;
+    }
+
+    if (rsa->p == NULL || rsa->q == NULL) {
+        BN_CTX_end(ctx);
+        BN_CTX_free(ctx);
+        return 2;
+    }
+
+    /*
+     * Since both primes are set we can now calculate all remaining
+     * components.
+     */
+
+    /* calculate n */
+    rsa->n = BN_new();
+    if (rsa->n == NULL)
+        goto err;
+    if (!BN_mul(rsa->n, rsa->p, rsa->q, ctx))
+        goto err;
+
+    /* calculate d */
+    if (!BN_sub(r1, rsa->p, BN_value_one()))
+        goto err;               /* p-1 */
+    if (!BN_sub(r2, rsa->q, BN_value_one()))
+        goto err;               /* q-1 */
+    if (!BN_mul(r0, r1, r2, ctx))
+        goto err;               /* (p-1)(q-1) */
+
+    if (!BN_gcd(r3, r1, r2, ctx))
+        goto err;
+
+    if (!BN_div(r0, NULL, r0, r3, ctx))
+        goto err;               /* LCM((p-1)(q-1)) */
+
+    ctx2 = BN_CTX_new();
+    if (ctx2 == NULL)
+        goto err;
+
+    rsa->d = BN_mod_inverse(NULL, rsa->e, r0, ctx2); /* d */
+    if (rsa->d == NULL)
+        goto err;
+
+    /* calculate d mod (p-1) */
+    rsa->dmp1 = BN_new();
+    if (rsa->dmp1 == NULL)
+        goto err;
+    if (!BN_mod(rsa->dmp1, rsa->d, r1, ctx))
+        goto err;
+
+    /* calculate d mod (q-1) */
+    rsa->dmq1 = BN_new();
+    if (rsa->dmq1 == NULL)
+        goto err;
+    if (!BN_mod(rsa->dmq1, rsa->d, r2, ctx))
+        goto err;
+
+    /* calculate inverse of q mod p */
+    rsa->iqmp = BN_mod_inverse(NULL, rsa->q, rsa->p, ctx2);
+    if (rsa->iqmp == NULL)
+        goto err;
+
+    ret = 1;
+ err:
+    BN_CTX_end(ctx);
+    BN_CTX_free(ctx);
+    BN_CTX_free(ctx2);
+
+    return ret;
+
+}
+
+int RSA_X931_generate_key_ex(RSA *rsa, int bits, const BIGNUM *e,
+                             BN_GENCB *cb)
+{
+    int ok = 0;
+    BIGNUM *Xp = NULL, *Xq = NULL;
+    BN_CTX *ctx = NULL;
+
+    ctx = BN_CTX_new();
+    if (ctx == NULL)
+        goto error;
+
+    BN_CTX_start(ctx);
+    Xp = BN_CTX_get(ctx);
+    Xq = BN_CTX_get(ctx);
+    if (Xq == NULL)
+        goto error;
+    if (!BN_X931_generate_Xpq(Xp, Xq, bits, ctx))
+        goto error;
+
+    rsa->p = BN_new();
+    rsa->q = BN_new();
+    if (rsa->p == NULL || rsa->q == NULL)
+        goto error;
+
+    /* Generate two primes from Xp, Xq */
+
+    if (!BN_X931_generate_prime_ex(rsa->p, NULL, NULL, NULL, NULL, Xp,
+                                   e, ctx, cb))
+        goto error;
+
+    if (!BN_X931_generate_prime_ex(rsa->q, NULL, NULL, NULL, NULL, Xq,
+                                   e, ctx, cb))
+        goto error;
+
+    /*
+     * Since rsa->p and rsa->q are valid this call will just derive remaining
+     * RSA components.
+     */
+
+    if (!RSA_X931_derive_ex(rsa, NULL, NULL, NULL, NULL,
+                            NULL, NULL, NULL, NULL, NULL, NULL, e, cb))
+        goto error;
+
+    ok = 1;
+
+ error:
+    BN_CTX_end(ctx);
+    BN_CTX_free(ctx);
+
+    if (ok)
+        return 1;
+
+    return 0;
+
+}