zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libssl/openssl-1.1.1o/crypto/rsa/rsa_x931.c b/ap/lib/libssl/openssl-1.1.1o/crypto/rsa/rsa_x931.c
new file mode 100644
index 0000000..7b0486c
--- /dev/null
+++ b/ap/lib/libssl/openssl-1.1.1o/crypto/rsa/rsa_x931.c
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2005-2017 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 <openssl/bn.h>
+#include <openssl/rsa.h>
+#include <openssl/objects.h>
+
+int RSA_padding_add_X931(unsigned char *to, int tlen,
+ const unsigned char *from, int flen)
+{
+ int j;
+ unsigned char *p;
+
+ /*
+ * Absolute minimum amount of padding is 1 header nibble, 1 padding
+ * nibble and 2 trailer bytes: but 1 hash if is already in 'from'.
+ */
+
+ j = tlen - flen - 2;
+
+ if (j < 0) {
+ RSAerr(RSA_F_RSA_PADDING_ADD_X931, RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
+ return -1;
+ }
+
+ p = (unsigned char *)to;
+
+ /* If no padding start and end nibbles are in one byte */
+ if (j == 0) {
+ *p++ = 0x6A;
+ } else {
+ *p++ = 0x6B;
+ if (j > 1) {
+ memset(p, 0xBB, j - 1);
+ p += j - 1;
+ }
+ *p++ = 0xBA;
+ }
+ memcpy(p, from, (unsigned int)flen);
+ p += flen;
+ *p = 0xCC;
+ return 1;
+}
+
+int RSA_padding_check_X931(unsigned char *to, int tlen,
+ const unsigned char *from, int flen, int num)
+{
+ int i = 0, j;
+ const unsigned char *p;
+
+ p = from;
+ if ((num != flen) || ((*p != 0x6A) && (*p != 0x6B))) {
+ RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_HEADER);
+ return -1;
+ }
+
+ if (*p++ == 0x6B) {
+ j = flen - 3;
+ for (i = 0; i < j; i++) {
+ unsigned char c = *p++;
+ if (c == 0xBA)
+ break;
+ if (c != 0xBB) {
+ RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING);
+ return -1;
+ }
+ }
+
+ j -= i;
+
+ if (i == 0) {
+ RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_PADDING);
+ return -1;
+ }
+
+ } else {
+ j = flen - 2;
+ }
+
+ if (p[j] != 0xCC) {
+ RSAerr(RSA_F_RSA_PADDING_CHECK_X931, RSA_R_INVALID_TRAILER);
+ return -1;
+ }
+
+ memcpy(to, p, (unsigned int)j);
+
+ return j;
+}
+
+/* Translate between X931 hash ids and NIDs */
+
+int RSA_X931_hash_id(int nid)
+{
+ switch (nid) {
+ case NID_sha1:
+ return 0x33;
+
+ case NID_sha256:
+ return 0x34;
+
+ case NID_sha384:
+ return 0x36;
+
+ case NID_sha512:
+ return 0x35;
+
+ }
+ return -1;
+}