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-rw-r--r--crypto/rsa/rsa_ssl.c154
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+/* crypto/rsa/rsa_ssl.c */
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
+ * All rights reserved.
+ *
+ * This package is an SSL implementation written
+ * by Eric Young (eay@cryptsoft.com).
+ * The implementation was written so as to conform with Netscapes SSL.
+ *
+ * This library is free for commercial and non-commercial use as long as
+ * the following conditions are aheared to. The following conditions
+ * apply to all code found in this distribution, be it the RC4, RSA,
+ * lhash, DES, etc., code; not just the SSL code. The SSL documentation
+ * included with this distribution is covered by the same copyright terms
+ * except that the holder is Tim Hudson (tjh@cryptsoft.com).
+ *
+ * Copyright remains Eric Young's, and as such any Copyright notices in
+ * the code are not to be removed.
+ * If this package is used in a product, Eric Young should be given attribution
+ * as the author of the parts of the library used.
+ * This can be in the form of a textual message at program startup or
+ * in documentation (online or textual) provided with the package.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * "This product includes cryptographic software written by
+ * Eric Young (eay@cryptsoft.com)"
+ * The word 'cryptographic' can be left out if the rouines from the library
+ * being used are not cryptographic related :-).
+ * 4. If you include any Windows specific code (or a derivative thereof) from
+ * the apps directory (application code) you must include an acknowledgement:
+ * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * The licence and distribution terms for any publically available version or
+ * derivative of this code cannot be changed. i.e. this code cannot simply be
+ * copied and put under another distribution licence
+ * [including the GNU Public Licence.]
+ */
+
+#include <stdio.h>
+#include "cryptlib.h"
+#include <openssl/bn.h>
+#include <openssl/rsa.h>
+#include <openssl/rand.h>
+
+int RSA_padding_add_SSLv23(unsigned char *to, int tlen,
+ const unsigned char *from, int flen)
+ {
+ int i,j;
+ unsigned char *p;
+
+ if (flen > (tlen-11))
+ {
+ RSAerr(RSA_F_RSA_PADDING_ADD_SSLV23,RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
+ return(0);
+ }
+
+ p=(unsigned char *)to;
+
+ *(p++)=0;
+ *(p++)=2; /* Public Key BT (Block Type) */
+
+ /* pad out with non-zero random data */
+ j=tlen-3-8-flen;
+
+ if (RAND_bytes(p,j) <= 0)
+ return(0);
+ for (i=0; i<j; i++)
+ {
+ if (*p == '\0')
+ do {
+ if (RAND_bytes(p,1) <= 0)
+ return(0);
+ } while (*p == '\0');
+ p++;
+ }
+
+ memset(p,3,8);
+ p+=8;
+ *(p++)='\0';
+
+ memcpy(p,from,(unsigned int)flen);
+ return(1);
+ }
+
+int RSA_padding_check_SSLv23(unsigned char *to, int tlen,
+ const unsigned char *from, int flen, int num)
+ {
+ int i,j,k;
+ const unsigned char *p;
+
+ p=from;
+ if (flen < 10)
+ {
+ RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,RSA_R_DATA_TOO_SMALL);
+ return(-1);
+ }
+ if ((num != (flen+1)) || (*(p++) != 02))
+ {
+ RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,RSA_R_BLOCK_TYPE_IS_NOT_02);
+ return(-1);
+ }
+
+ /* scan over padding data */
+ j=flen-1; /* one for type */
+ for (i=0; i<j; i++)
+ if (*(p++) == 0) break;
+
+ if ((i == j) || (i < 8))
+ {
+ RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,RSA_R_NULL_BEFORE_BLOCK_MISSING);
+ return(-1);
+ }
+ for (k= -8; k<0; k++)
+ {
+ if (p[k] != 0x03) break;
+ }
+ if (k == -1)
+ {
+ RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,RSA_R_SSLV3_ROLLBACK_ATTACK);
+ return(-1);
+ }
+
+ i++; /* Skip over the '\0' */
+ j-=i;
+ if (j > tlen)
+ {
+ RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,RSA_R_DATA_TOO_LARGE);
+ return(-1);
+ }
+ memcpy(to,p,(unsigned int)j);
+
+ return(j);
+ }
+