zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libssl/openssl-1.1.1o/crypto/bn/bn_mpi.c b/ap/lib/libssl/openssl-1.1.1o/crypto/bn/bn_mpi.c
new file mode 100644
index 0000000..0902da5
--- /dev/null
+++ b/ap/lib/libssl/openssl-1.1.1o/crypto/bn/bn_mpi.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright 1995-2020 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 "internal/cryptlib.h"
+#include "bn_local.h"
+
+int BN_bn2mpi(const BIGNUM *a, unsigned char *d)
+{
+ int bits;
+ int num = 0;
+ int ext = 0;
+ long l;
+
+ bits = BN_num_bits(a);
+ num = (bits + 7) / 8;
+ if (bits > 0) {
+ ext = ((bits & 0x07) == 0);
+ }
+ if (d == NULL)
+ return (num + 4 + ext);
+
+ l = num + ext;
+ d[0] = (unsigned char)(l >> 24) & 0xff;
+ d[1] = (unsigned char)(l >> 16) & 0xff;
+ d[2] = (unsigned char)(l >> 8) & 0xff;
+ d[3] = (unsigned char)(l) & 0xff;
+ if (ext)
+ d[4] = 0;
+ num = BN_bn2bin(a, &(d[4 + ext]));
+ if (a->neg)
+ d[4] |= 0x80;
+ return (num + 4 + ext);
+}
+
+BIGNUM *BN_mpi2bn(const unsigned char *d, int n, BIGNUM *ain)
+{
+ long len;
+ int neg = 0;
+ BIGNUM *a = NULL;
+
+ if (n < 4 || (d[0] & 0x80) != 0) {
+ BNerr(BN_F_BN_MPI2BN, BN_R_INVALID_LENGTH);
+ return NULL;
+ }
+ len = ((long)d[0] << 24) | ((long)d[1] << 16) | ((int)d[2] << 8) | (int)
+ d[3];
+ if ((len + 4) != n) {
+ BNerr(BN_F_BN_MPI2BN, BN_R_ENCODING_ERROR);
+ return NULL;
+ }
+
+ if (ain == NULL)
+ a = BN_new();
+ else
+ a = ain;
+
+ if (a == NULL)
+ return NULL;
+
+ if (len == 0) {
+ a->neg = 0;
+ a->top = 0;
+ return a;
+ }
+ d += 4;
+ if ((*d) & 0x80)
+ neg = 1;
+ if (BN_bin2bn(d, (int)len, a) == NULL) {
+ if (ain == NULL)
+ BN_free(a);
+ return NULL;
+ }
+ a->neg = neg;
+ if (neg) {
+ BN_clear_bit(a, BN_num_bits(a) - 1);
+ }
+ bn_check_top(a);
+ return a;
+}