zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libssl/openssl-1.1.1o/crypto/ec/ec2_oct.c b/ap/lib/libssl/openssl-1.1.1o/crypto/ec/ec2_oct.c
new file mode 100644
index 0000000..788e650
--- /dev/null
+++ b/ap/lib/libssl/openssl-1.1.1o/crypto/ec/ec2_oct.c
@@ -0,0 +1,363 @@
+/*
+ * Copyright 2011-2021 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright (c) 2002, Oracle and/or its affiliates. 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 <openssl/err.h>
+
+#include "ec_local.h"
+
+#ifndef OPENSSL_NO_EC2M
+
+/*-
+ * Calculates and sets the affine coordinates of an EC_POINT from the given
+ * compressed coordinates. Uses algorithm 2.3.4 of SEC 1.
+ * Note that the simple implementation only uses affine coordinates.
+ *
+ * The method is from the following publication:
+ *
+ * Harper, Menezes, Vanstone:
+ * "Public-Key Cryptosystems with Very Small Key Lengths",
+ * EUROCRYPT '92, Springer-Verlag LNCS 658,
+ * published February 1993
+ *
+ * US Patents 6,141,420 and 6,618,483 (Vanstone, Mullin, Agnew) describe
+ * the same method, but claim no priority date earlier than July 29, 1994
+ * (and additionally fail to cite the EUROCRYPT '92 publication as prior art).
+ */
+int ec_GF2m_simple_set_compressed_coordinates(const EC_GROUP *group,
+ EC_POINT *point,
+ const BIGNUM *x_, int y_bit,
+ BN_CTX *ctx)
+{
+ BN_CTX *new_ctx = NULL;
+ BIGNUM *tmp, *x, *y, *z;
+ int ret = 0, z0;
+
+ /* clear error queue */
+ ERR_clear_error();
+
+ if (ctx == NULL) {
+ ctx = new_ctx = BN_CTX_new();
+ if (ctx == NULL)
+ return 0;
+ }
+
+ y_bit = (y_bit != 0) ? 1 : 0;
+
+ BN_CTX_start(ctx);
+ tmp = BN_CTX_get(ctx);
+ x = BN_CTX_get(ctx);
+ y = BN_CTX_get(ctx);
+ z = BN_CTX_get(ctx);
+ if (z == NULL)
+ goto err;
+
+ if (!BN_GF2m_mod_arr(x, x_, group->poly))
+ goto err;
+ if (BN_is_zero(x)) {
+ if (!BN_GF2m_mod_sqrt_arr(y, group->b, group->poly, ctx))
+ goto err;
+ } else {
+ if (!group->meth->field_sqr(group, tmp, x, ctx))
+ goto err;
+ if (!group->meth->field_div(group, tmp, group->b, tmp, ctx))
+ goto err;
+ if (!BN_GF2m_add(tmp, group->a, tmp))
+ goto err;
+ if (!BN_GF2m_add(tmp, x, tmp))
+ goto err;
+ if (!BN_GF2m_mod_solve_quad_arr(z, tmp, group->poly, ctx)) {
+ unsigned long err = ERR_peek_last_error();
+
+ if (ERR_GET_LIB(err) == ERR_LIB_BN
+ && ERR_GET_REASON(err) == BN_R_NO_SOLUTION) {
+ ERR_clear_error();
+ ECerr(EC_F_EC_GF2M_SIMPLE_SET_COMPRESSED_COORDINATES,
+ EC_R_INVALID_COMPRESSED_POINT);
+ } else
+ ECerr(EC_F_EC_GF2M_SIMPLE_SET_COMPRESSED_COORDINATES,
+ ERR_R_BN_LIB);
+ goto err;
+ }
+ z0 = (BN_is_odd(z)) ? 1 : 0;
+ if (!group->meth->field_mul(group, y, x, z, ctx))
+ goto err;
+ if (z0 != y_bit) {
+ if (!BN_GF2m_add(y, y, x))
+ goto err;
+ }
+ }
+
+ if (!EC_POINT_set_affine_coordinates(group, point, x, y, ctx))
+ goto err;
+
+ ret = 1;
+
+ err:
+ BN_CTX_end(ctx);
+ BN_CTX_free(new_ctx);
+ return ret;
+}
+
+/*
+ * Converts an EC_POINT to an octet string. If buf is NULL, the encoded
+ * length will be returned. If the length len of buf is smaller than required
+ * an error will be returned.
+ */
+size_t ec_GF2m_simple_point2oct(const EC_GROUP *group, const EC_POINT *point,
+ point_conversion_form_t form,
+ unsigned char *buf, size_t len, BN_CTX *ctx)
+{
+ size_t ret;
+ BN_CTX *new_ctx = NULL;
+ int used_ctx = 0;
+ BIGNUM *x, *y, *yxi;
+ size_t field_len, i, skip;
+
+ if ((form != POINT_CONVERSION_COMPRESSED)
+ && (form != POINT_CONVERSION_UNCOMPRESSED)
+ && (form != POINT_CONVERSION_HYBRID)) {
+ ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, EC_R_INVALID_FORM);
+ goto err;
+ }
+
+ if (EC_POINT_is_at_infinity(group, point)) {
+ /* encodes to a single 0 octet */
+ if (buf != NULL) {
+ if (len < 1) {
+ ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, EC_R_BUFFER_TOO_SMALL);
+ return 0;
+ }
+ buf[0] = 0;
+ }
+ return 1;
+ }
+
+ /* ret := required output buffer length */
+ field_len = (EC_GROUP_get_degree(group) + 7) / 8;
+ ret =
+ (form ==
+ POINT_CONVERSION_COMPRESSED) ? 1 + field_len : 1 + 2 * field_len;
+
+ /* if 'buf' is NULL, just return required length */
+ if (buf != NULL) {
+ if (len < ret) {
+ ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, EC_R_BUFFER_TOO_SMALL);
+ goto err;
+ }
+
+ if (ctx == NULL) {
+ ctx = new_ctx = BN_CTX_new();
+ if (ctx == NULL)
+ return 0;
+ }
+
+ BN_CTX_start(ctx);
+ used_ctx = 1;
+ x = BN_CTX_get(ctx);
+ y = BN_CTX_get(ctx);
+ yxi = BN_CTX_get(ctx);
+ if (yxi == NULL)
+ goto err;
+
+ if (!EC_POINT_get_affine_coordinates(group, point, x, y, ctx))
+ goto err;
+
+ buf[0] = form;
+ if ((form != POINT_CONVERSION_UNCOMPRESSED) && !BN_is_zero(x)) {
+ if (!group->meth->field_div(group, yxi, y, x, ctx))
+ goto err;
+ if (BN_is_odd(yxi))
+ buf[0]++;
+ }
+
+ i = 1;
+
+ skip = field_len - BN_num_bytes(x);
+ if (skip > field_len) {
+ ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ while (skip > 0) {
+ buf[i++] = 0;
+ skip--;
+ }
+ skip = BN_bn2bin(x, buf + i);
+ i += skip;
+ if (i != 1 + field_len) {
+ ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+
+ if (form == POINT_CONVERSION_UNCOMPRESSED
+ || form == POINT_CONVERSION_HYBRID) {
+ skip = field_len - BN_num_bytes(y);
+ if (skip > field_len) {
+ ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ while (skip > 0) {
+ buf[i++] = 0;
+ skip--;
+ }
+ skip = BN_bn2bin(y, buf + i);
+ i += skip;
+ }
+
+ if (i != ret) {
+ ECerr(EC_F_EC_GF2M_SIMPLE_POINT2OCT, ERR_R_INTERNAL_ERROR);
+ goto err;
+ }
+ }
+
+ if (used_ctx)
+ BN_CTX_end(ctx);
+ BN_CTX_free(new_ctx);
+ return ret;
+
+ err:
+ if (used_ctx)
+ BN_CTX_end(ctx);
+ BN_CTX_free(new_ctx);
+ return 0;
+}
+
+/*
+ * Converts an octet string representation to an EC_POINT. Note that the
+ * simple implementation only uses affine coordinates.
+ */
+int ec_GF2m_simple_oct2point(const EC_GROUP *group, EC_POINT *point,
+ const unsigned char *buf, size_t len,
+ BN_CTX *ctx)
+{
+ point_conversion_form_t form;
+ int y_bit, m;
+ BN_CTX *new_ctx = NULL;
+ BIGNUM *x, *y, *yxi;
+ size_t field_len, enc_len;
+ int ret = 0;
+
+ if (len == 0) {
+ ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_BUFFER_TOO_SMALL);
+ return 0;
+ }
+
+ /*
+ * The first octet is the point converison octet PC, see X9.62, page 4
+ * and section 4.4.2. It must be:
+ * 0x00 for the point at infinity
+ * 0x02 or 0x03 for compressed form
+ * 0x04 for uncompressed form
+ * 0x06 or 0x07 for hybrid form.
+ * For compressed or hybrid forms, we store the last bit of buf[0] as
+ * y_bit and clear it from buf[0] so as to obtain a POINT_CONVERSION_*.
+ * We error if buf[0] contains any but the above values.
+ */
+ y_bit = buf[0] & 1;
+ form = buf[0] & ~1U;
+
+ if ((form != 0) && (form != POINT_CONVERSION_COMPRESSED)
+ && (form != POINT_CONVERSION_UNCOMPRESSED)
+ && (form != POINT_CONVERSION_HYBRID)) {
+ ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);
+ return 0;
+ }
+ if ((form == 0 || form == POINT_CONVERSION_UNCOMPRESSED) && y_bit) {
+ ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);
+ return 0;
+ }
+
+ /* The point at infinity is represented by a single zero octet. */
+ if (form == 0) {
+ if (len != 1) {
+ ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);
+ return 0;
+ }
+
+ return EC_POINT_set_to_infinity(group, point);
+ }
+
+ m = EC_GROUP_get_degree(group);
+ field_len = (m + 7) / 8;
+ enc_len =
+ (form ==
+ POINT_CONVERSION_COMPRESSED) ? 1 + field_len : 1 + 2 * field_len;
+
+ if (len != enc_len) {
+ ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);
+ return 0;
+ }
+
+ if (ctx == NULL) {
+ ctx = new_ctx = BN_CTX_new();
+ if (ctx == NULL)
+ return 0;
+ }
+
+ BN_CTX_start(ctx);
+ x = BN_CTX_get(ctx);
+ y = BN_CTX_get(ctx);
+ yxi = BN_CTX_get(ctx);
+ if (yxi == NULL)
+ goto err;
+
+ if (!BN_bin2bn(buf + 1, field_len, x))
+ goto err;
+ if (BN_num_bits(x) > m) {
+ ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);
+ goto err;
+ }
+
+ if (form == POINT_CONVERSION_COMPRESSED) {
+ if (!EC_POINT_set_compressed_coordinates(group, point, x, y_bit, ctx))
+ goto err;
+ } else {
+ if (!BN_bin2bn(buf + 1 + field_len, field_len, y))
+ goto err;
+ if (BN_num_bits(y) > m) {
+ ECerr(EC_F_EC_GF2M_SIMPLE_OCT2POINT, EC_R_INVALID_ENCODING);
+ goto err;
+ }
+ if (form == POINT_CONVERSION_HYBRID) {
+ /*
+ * Check that the form in the encoding was set correctly
+ * according to X9.62 4.4.2.a, 4(c), see also first paragraph
+ * of X9.62, 4.4.1.b.
+ */
+ if (BN_is_zero(x)) {
+ if (y_bit != 0) {
+ ECerr(ERR_LIB_EC, EC_R_INVALID_ENCODING);
+ goto err;
+ }
+ } else {
+ if (!group->meth->field_div(group, yxi, y, x, ctx))
+ goto err;
+ if (y_bit != BN_is_odd(yxi)) {
+ ECerr(ERR_LIB_EC, EC_R_INVALID_ENCODING);
+ goto err;
+ }
+ }
+ }
+
+ /*
+ * EC_POINT_set_affine_coordinates is responsible for checking that
+ * the point is on the curve.
+ */
+ if (!EC_POINT_set_affine_coordinates(group, point, x, y, ctx))
+ goto err;
+ }
+
+ ret = 1;
+
+ err:
+ BN_CTX_end(ctx);
+ BN_CTX_free(new_ctx);
+ return ret;
+}
+#endif