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Side by Side Diff: openssl/crypto/des/enc_read.c

Issue 9254031: Upgrade chrome's OpenSSL to same version Android ships with. (Closed) Base URL: http://src.chromium.org/svn/trunk/deps/third_party/openssl/
Patch Set: '' Created 8 years, 11 months ago
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1 /* crypto/des/enc_read.c */ 1 /* crypto/des/enc_read.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved. 3 * All rights reserved.
4 * 4 *
5 * This package is an SSL implementation written 5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com). 6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL. 7 * The implementation was written so as to conform with Netscapes SSL.
8 * 8 *
9 * This library is free for commercial and non-commercial use as long as 9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions 10 * the following conditions are aheared to. The following conditions
(...skipping 45 matching lines...) Expand 10 before | Expand all | Expand 10 after
56 * [including the GNU Public Licence.] 56 * [including the GNU Public Licence.]
57 */ 57 */
58 58
59 #include <stdio.h> 59 #include <stdio.h>
60 #include <errno.h> 60 #include <errno.h>
61 #include "cryptlib.h" 61 #include "cryptlib.h"
62 #include "des_locl.h" 62 #include "des_locl.h"
63 63
64 /* This has some uglies in it but it works - even over sockets. */ 64 /* This has some uglies in it but it works - even over sockets. */
65 /*extern int errno;*/ 65 /*extern int errno;*/
66 OPENSSL_IMPLEMENT_GLOBAL(int,DES_rw_mode)=DES_PCBC_MODE; 66 OPENSSL_IMPLEMENT_GLOBAL(int,DES_rw_mode,DES_PCBC_MODE)
67 67
68 68
69 /* 69 /*
70 * WARNINGS: 70 * WARNINGS:
71 * 71 *
72 * - The data format used by DES_enc_write() and DES_enc_read() 72 * - The data format used by DES_enc_write() and DES_enc_read()
73 * has a cryptographic weakness: When asked to write more 73 * has a cryptographic weakness: When asked to write more
74 * than MAXWRITE bytes, DES_enc_write will split the data 74 * than MAXWRITE bytes, DES_enc_write will split the data
75 * into several chunks that are all encrypted 75 * into several chunks that are all encrypted
76 * using the same IV. So don't use these functions unless you 76 * using the same IV. So don't use these functions unless you
77 * are sure you know what you do (in which case you might 77 * are sure you know what you do (in which case you might
78 * not want to use them anyway). 78 * not want to use them anyway).
79 * 79 *
80 * - This code cannot handle non-blocking sockets. 80 * - This code cannot handle non-blocking sockets.
81 * 81 *
82 * - This function uses an internal state and thus cannot be 82 * - This function uses an internal state and thus cannot be
83 * used on multiple files. 83 * used on multiple files.
84 */ 84 */
85 85
86 86
87 int DES_enc_read(int fd, void *buf, int len, DES_key_schedule *sched, 87 int DES_enc_read(int fd, void *buf, int len, DES_key_schedule *sched,
88 DES_cblock *iv) 88 DES_cblock *iv)
89 { 89 {
90 #if defined(OPENSSL_NO_POSIX_IO)
91 return(0);
92 #else
90 /* data to be unencrypted */ 93 /* data to be unencrypted */
91 int net_num=0; 94 int net_num=0;
92 static unsigned char *net=NULL; 95 static unsigned char *net=NULL;
93 /* extra unencrypted data 96 /* extra unencrypted data
94 * for when a block of 100 comes in but is des_read one byte at 97 * for when a block of 100 comes in but is des_read one byte at
95 * a time. */ 98 * a time. */
96 static unsigned char *unnet=NULL; 99 static unsigned char *unnet=NULL;
97 static int unnet_start=0; 100 static int unnet_start=0;
98 static int unnet_left=0; 101 static int unnet_left=0;
99 static unsigned char *tmpbuf=NULL; 102 static unsigned char *tmpbuf=NULL;
(...skipping 40 matching lines...) Expand 10 before | Expand all | Expand 10 after
140 } 143 }
141 return(i); 144 return(i);
142 } 145 }
143 146
144 /* We need to get more data. */ 147 /* We need to get more data. */
145 if (len > MAXWRITE) len=MAXWRITE; 148 if (len > MAXWRITE) len=MAXWRITE;
146 149
147 /* first - get the length */ 150 /* first - get the length */
148 while (net_num < HDRSIZE) 151 while (net_num < HDRSIZE)
149 { 152 {
150 #ifndef _WIN32 153 #ifndef OPENSSL_SYS_WIN32
151 i=read(fd,(void *)&(net[net_num]),HDRSIZE-net_num); 154 i=read(fd,(void *)&(net[net_num]),HDRSIZE-net_num);
152 #else 155 #else
153 i=_read(fd,(void *)&(net[net_num]),HDRSIZE-net_num); 156 i=_read(fd,(void *)&(net[net_num]),HDRSIZE-net_num);
154 #endif 157 #endif
155 #ifdef EINTR 158 #ifdef EINTR
156 if ((i == -1) && (errno == EINTR)) continue; 159 if ((i == -1) && (errno == EINTR)) continue;
157 #endif 160 #endif
158 if (i <= 0) return(0); 161 if (i <= 0) return(0);
159 net_num+=i; 162 net_num+=i;
160 } 163 }
161 164
162 /* we now have at net_num bytes in net */ 165 /* we now have at net_num bytes in net */
163 p=net; 166 p=net;
164 /* num=0; */ 167 /* num=0; */
165 n2l(p,num); 168 n2l(p,num);
166 /* num should be rounded up to the next group of eight 169 /* num should be rounded up to the next group of eight
167 * we make sure that we have read a multiple of 8 bytes from the net. 170 * we make sure that we have read a multiple of 8 bytes from the net.
168 */ 171 */
169 if ((num > MAXWRITE) || (num < 0)) /* error */ 172 if ((num > MAXWRITE) || (num < 0)) /* error */
170 return(-1); 173 return(-1);
171 rnum=(num < 8)?8:((num+7)/8*8); 174 rnum=(num < 8)?8:((num+7)/8*8);
172 175
173 net_num=0; 176 net_num=0;
174 while (net_num < rnum) 177 while (net_num < rnum)
175 { 178 {
179 #ifndef OPENSSL_SYS_WIN32
176 i=read(fd,(void *)&(net[net_num]),rnum-net_num); 180 i=read(fd,(void *)&(net[net_num]),rnum-net_num);
181 #else
182 i=_read(fd,(void *)&(net[net_num]),rnum-net_num);
183 #endif
177 #ifdef EINTR 184 #ifdef EINTR
178 if ((i == -1) && (errno == EINTR)) continue; 185 if ((i == -1) && (errno == EINTR)) continue;
179 #endif 186 #endif
180 if (i <= 0) return(0); 187 if (i <= 0) return(0);
181 net_num+=i; 188 net_num+=i;
182 } 189 }
183 190
184 /* Check if there will be data left over. */ 191 /* Check if there will be data left over. */
185 if (len < num) 192 if (len < num)
186 { 193 {
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221 { 228 {
222 if (DES_rw_mode & DES_PCBC_MODE) 229 if (DES_rw_mode & DES_PCBC_MODE)
223 DES_pcbc_encrypt(net,buf,num,sched,iv, 230 DES_pcbc_encrypt(net,buf,num,sched,iv,
224 DES_DECRYPT); 231 DES_DECRYPT);
225 else 232 else
226 DES_cbc_encrypt(net,buf,num,sched,iv, 233 DES_cbc_encrypt(net,buf,num,sched,iv,
227 DES_DECRYPT); 234 DES_DECRYPT);
228 } 235 }
229 } 236 }
230 return num; 237 return num;
238 #endif /* OPENSSL_NO_POSIX_IO */
231 } 239 }
232 240
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