1 files changed, 116 insertions, 0 deletions
diff --git a/openssl-1.1.0h/crypto/rsa/rsa_x931.c b/openssl-1.1.0h/crypto/rsa/rsa_x931.c
new file mode 100644
index 0000000..b9301f3
--- /dev/null
+++ b/openssl-1.1.0h/crypto/rsa/rsa_x931.c
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2005-2016 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 "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;
+}