Branch data Line data Source code
1 : : /* crypto/rsa/rsa_ssl.c */
2 : : /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 : : * All rights reserved.
4 : : *
5 : : * This package is an SSL implementation written
6 : : * by Eric Young (eay@cryptsoft.com).
7 : : * The implementation was written so as to conform with Netscapes SSL.
8 : : *
9 : : * This library is free for commercial and non-commercial use as long as
10 : : * the following conditions are aheared to. The following conditions
11 : : * apply to all code found in this distribution, be it the RC4, RSA,
12 : : * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 : : * included with this distribution is covered by the same copyright terms
14 : : * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 : : *
16 : : * Copyright remains Eric Young's, and as such any Copyright notices in
17 : : * the code are not to be removed.
18 : : * If this package is used in a product, Eric Young should be given attribution
19 : : * as the author of the parts of the library used.
20 : : * This can be in the form of a textual message at program startup or
21 : : * in documentation (online or textual) provided with the package.
22 : : *
23 : : * Redistribution and use in source and binary forms, with or without
24 : : * modification, are permitted provided that the following conditions
25 : : * are met:
26 : : * 1. Redistributions of source code must retain the copyright
27 : : * notice, this list of conditions and the following disclaimer.
28 : : * 2. Redistributions in binary form must reproduce the above copyright
29 : : * notice, this list of conditions and the following disclaimer in the
30 : : * documentation and/or other materials provided with the distribution.
31 : : * 3. All advertising materials mentioning features or use of this software
32 : : * must display the following acknowledgement:
33 : : * "This product includes cryptographic software written by
34 : : * Eric Young (eay@cryptsoft.com)"
35 : : * The word 'cryptographic' can be left out if the rouines from the library
36 : : * being used are not cryptographic related :-).
37 : : * 4. If you include any Windows specific code (or a derivative thereof) from
38 : : * the apps directory (application code) you must include an acknowledgement:
39 : : * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 : : *
41 : : * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 : : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 : : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 : : * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 : : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 : : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 : : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 : : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 : : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 : : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 : : * SUCH DAMAGE.
52 : : *
53 : : * The licence and distribution terms for any publically available version or
54 : : * derivative of this code cannot be changed. i.e. this code cannot simply be
55 : : * copied and put under another distribution licence
56 : : * [including the GNU Public Licence.]
57 : : */
58 : :
59 : : #define OPENSSL_FIPSAPI
60 : :
61 : : #include <stdio.h>
62 : : #include "cryptlib.h"
63 : : #include <openssl/bn.h>
64 : : #include <openssl/rsa.h>
65 : : #include <openssl/rand.h>
66 : :
67 : 0 : int RSA_padding_add_SSLv23(unsigned char *to, int tlen,
68 : : const unsigned char *from, int flen)
69 : : {
70 : : int i,j;
71 : : unsigned char *p;
72 : :
73 [ # # ]: 0 : if (flen > (tlen-11))
74 : : {
75 : 0 : RSAerr(RSA_F_RSA_PADDING_ADD_SSLV23,RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
76 : 0 : return(0);
77 : : }
78 : :
79 : 0 : p=(unsigned char *)to;
80 : :
81 : 0 : *(p++)=0;
82 : 0 : *(p++)=2; /* Public Key BT (Block Type) */
83 : :
84 : : /* pad out with non-zero random data */
85 : 0 : j=tlen-3-8-flen;
86 : :
87 [ # # ]: 0 : if (RAND_bytes(p,j) <= 0)
88 : : return(0);
89 [ # # ]: 0 : for (i=0; i<j; i++)
90 : : {
91 [ # # ]: 0 : if (*p == '\0')
92 : : do {
93 [ # # ]: 0 : if (RAND_bytes(p,1) <= 0)
94 : : return(0);
95 [ # # ]: 0 : } while (*p == '\0');
96 : 0 : p++;
97 : : }
98 : :
99 : : memset(p,3,8);
100 : 0 : p+=8;
101 : 0 : *(p++)='\0';
102 : :
103 : 0 : memcpy(p,from,(unsigned int)flen);
104 : 0 : return(1);
105 : : }
106 : :
107 : 0 : int RSA_padding_check_SSLv23(unsigned char *to, int tlen,
108 : : const unsigned char *from, int flen, int num)
109 : : {
110 : : int i,j,k;
111 : : const unsigned char *p;
112 : :
113 : 0 : p=from;
114 [ # # ]: 0 : if (flen < 10)
115 : : {
116 : 0 : RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,RSA_R_DATA_TOO_SMALL);
117 : 0 : return(-1);
118 : : }
119 [ # # ][ # # ]: 0 : if ((num != (flen+1)) || (*(p++) != 02))
120 : : {
121 : 0 : RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,RSA_R_BLOCK_TYPE_IS_NOT_02);
122 : 0 : return(-1);
123 : : }
124 : :
125 : : /* scan over padding data */
126 : 0 : j=flen-1; /* one for type */
127 [ # # ]: 0 : for (i=0; i<j; i++)
128 [ # # ]: 0 : if (*(p++) == 0) break;
129 : :
130 [ # # ]: 0 : if ((i == j) || (i < 8))
131 : : {
132 : 0 : RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,RSA_R_NULL_BEFORE_BLOCK_MISSING);
133 : 0 : return(-1);
134 : : }
135 [ # # ]: 0 : for (k = -9; k<-1; k++)
136 : : {
137 [ # # ]: 0 : if (p[k] != 0x03) break;
138 : : }
139 [ # # ]: 0 : if (k == -1)
140 : : {
141 : 0 : RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,RSA_R_SSLV3_ROLLBACK_ATTACK);
142 : 0 : return(-1);
143 : : }
144 : :
145 : 0 : i++; /* Skip over the '\0' */
146 : 0 : j-=i;
147 [ # # ]: 0 : if (j > tlen)
148 : : {
149 : 0 : RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,RSA_R_DATA_TOO_LARGE);
150 : 0 : return(-1);
151 : : }
152 : 0 : memcpy(to,p,(unsigned int)j);
153 : :
154 : 0 : return(j);
155 : : }
156 : :
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