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| 1 /* crypto/des/enc_writ.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 #include <errno.h> | |
| 60 #include <time.h> | |
| 61 #include <stdio.h> | |
| 62 #include "cryptlib.h" | |
| 63 #include "des_locl.h" | |
| 64 #include <openssl/rand.h> | |
| 65 | |
| 66 /* | |
| 67 * WARNINGS: | |
| 68 * | |
| 69 * - The data format used by DES_enc_write() and DES_enc_read() | |
| 70 * has a cryptographic weakness: When asked to write more | |
| 71 * than MAXWRITE bytes, DES_enc_write will split the data | |
| 72 * into several chunks that are all encrypted | |
| 73 * using the same IV. So don't use these functions unless you | |
| 74 * are sure you know what you do (in which case you might | |
| 75 * not want to use them anyway). | |
| 76 * | |
| 77 * - This code cannot handle non-blocking sockets. | |
| 78 */ | |
| 79 | |
| 80 int DES_enc_write(int fd, const void *_buf, int len, | |
| 81 DES_key_schedule *sched, DES_cblock *iv) | |
| 82 { | |
| 83 #if defined(OPENSSL_NO_POSIX_IO) | |
| 84 return (-1); | |
| 85 #else | |
| 86 #ifdef _LIBC | |
| 87 extern unsigned long time(); | |
| 88 extern int write(); | |
| 89 #endif | |
| 90 const unsigned char *buf=_buf; | |
| 91 long rnum; | |
| 92 int i,j,k,outnum; | |
| 93 static unsigned char *outbuf=NULL; | |
| 94 unsigned char shortbuf[8]; | |
| 95 unsigned char *p; | |
| 96 const unsigned char *cp; | |
| 97 static int start=1; | |
| 98 | |
| 99 if (outbuf == NULL) | |
| 100 { | |
| 101 outbuf=OPENSSL_malloc(BSIZE+HDRSIZE); | |
| 102 if (outbuf == NULL) return(-1); | |
| 103 } | |
| 104 /* If we are sending less than 8 bytes, the same char will look | |
| 105 * the same if we don't pad it out with random bytes */ | |
| 106 if (start) | |
| 107 { | |
| 108 start=0; | |
| 109 } | |
| 110 | |
| 111 /* lets recurse if we want to send the data in small chunks */ | |
| 112 if (len > MAXWRITE) | |
| 113 { | |
| 114 j=0; | |
| 115 for (i=0; i<len; i+=k) | |
| 116 { | |
| 117 k=DES_enc_write(fd,&(buf[i]), | |
| 118 ((len-i) > MAXWRITE)?MAXWRITE:(len-i),sched,iv); | |
| 119 if (k < 0) | |
| 120 return(k); | |
| 121 else | |
| 122 j+=k; | |
| 123 } | |
| 124 return(j); | |
| 125 } | |
| 126 | |
| 127 /* write length first */ | |
| 128 p=outbuf; | |
| 129 l2n(len,p); | |
| 130 | |
| 131 /* pad short strings */ | |
| 132 if (len < 8) | |
| 133 { | |
| 134 cp=shortbuf; | |
| 135 memcpy(shortbuf,buf,len); | |
| 136 RAND_pseudo_bytes(shortbuf+len, 8-len); | |
| 137 rnum=8; | |
| 138 } | |
| 139 else | |
| 140 { | |
| 141 cp=buf; | |
| 142 rnum=((len+7)/8*8); /* round up to nearest eight */ | |
| 143 } | |
| 144 | |
| 145 if (DES_rw_mode & DES_PCBC_MODE) | |
| 146 DES_pcbc_encrypt(cp,&(outbuf[HDRSIZE]),(len<8)?8:len,sched,iv, | |
| 147 DES_ENCRYPT); | |
| 148 else | |
| 149 DES_cbc_encrypt(cp,&(outbuf[HDRSIZE]),(len<8)?8:len,sched,iv, | |
| 150 DES_ENCRYPT); | |
| 151 | |
| 152 /* output */ | |
| 153 outnum=rnum+HDRSIZE; | |
| 154 | |
| 155 for (j=0; j<outnum; j+=i) | |
| 156 { | |
| 157 /* eay 26/08/92 I was not doing writing from where we | |
| 158 * got up to. */ | |
| 159 #ifndef _WIN32 | |
| 160 i=write(fd,(void *)&(outbuf[j]),outnum-j); | |
| 161 #else | |
| 162 i=_write(fd,(void *)&(outbuf[j]),outnum-j); | |
| 163 #endif | |
| 164 if (i == -1) | |
| 165 { | |
| 166 #ifdef EINTR | |
| 167 if (errno == EINTR) | |
| 168 i=0; | |
| 169 else | |
| 170 #endif | |
| 171 /* This is really a bad error - very bad | |
| 172 * It will stuff-up both ends. */ | |
| 173 return(-1); | |
| 174 } | |
| 175 } | |
| 176 | |
| 177 return(len); | |
| 178 #endif /* OPENSSL_NO_POSIX_IO */ | |
| 179 } | |
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Chromium Code Reviews
Issue 2072073002:
Delete bundled copy of OpenSSL and replace with README. (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/openssl@master