/* crypto/des/enc_writ.c */
-/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
+/* 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:
* 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
+ * 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
* 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
#include <errno.h>
#include <time.h>
+#include <stdio.h>
+#include "cryptlib.h"
#include "des_locl.h"
+#include <openssl/rand.h>
-int des_enc_write(fd, buf, len, sched, iv)
-int fd;
-char *buf;
-int len;
-des_key_schedule sched;
-des_cblock (*iv);
- {
-#ifdef _LIBC
- extern int srandom();
- extern unsigned long time();
- extern int random();
- extern int write();
-#endif
+/*-
+ * WARNINGS:
+ *
+ * - The data format used by DES_enc_write() and DES_enc_read()
+ * has a cryptographic weakness: When asked to write more
+ * than MAXWRITE bytes, DES_enc_write will split the data
+ * into several chunks that are all encrypted
+ * using the same IV. So don't use these functions unless you
+ * are sure you know what you do (in which case you might
+ * not want to use them anyway).
+ *
+ * - This code cannot handle non-blocking sockets.
+ */
- long rnum;
- int i,j,k,outnum;
- char *outbuf=NULL;
- char shortbuf[8];
- char *p;
- static int start=1;
+int DES_enc_write(int fd, const void *_buf, int len,
+ DES_key_schedule *sched, DES_cblock *iv)
+{
+#if defined(OPENSSL_NO_POSIX_IO)
+ return (-1);
+#else
+# ifdef _LIBC
+ extern unsigned long time();
+ extern int write();
+# endif
+ const unsigned char *buf = _buf;
+ long rnum;
+ int i, j, k, outnum;
+ static unsigned char *outbuf = NULL;
+ unsigned char shortbuf[8];
+ unsigned char *p;
+ const unsigned char *cp;
+ static int start = 1;
- if (outbuf == NULL)
- {
- outbuf=(char *)malloc(BSIZE+HDRSIZE);
- if (outbuf == NULL) return(-1);
- }
- /* If we are sending less than 8 bytes, the same char will look
- * the same if we don't pad it out with random bytes */
- if (start)
- {
- start=0;
- srandom((unsigned int)time(NULL));
- }
+ if (outbuf == NULL) {
+ outbuf = OPENSSL_malloc(BSIZE + HDRSIZE);
+ if (outbuf == NULL)
+ return (-1);
+ }
+ /*
+ * If we are sending less than 8 bytes, the same char will look the same
+ * if we don't pad it out with random bytes
+ */
+ if (start) {
+ start = 0;
+ }
- /* lets recurse if we want to send the data in small chunks */
- if (len > MAXWRITE)
- {
- j=0;
- for (i=0; i<len; i+=k)
- {
- k=des_enc_write(fd,&(buf[i]),
- ((len-i) > MAXWRITE)?MAXWRITE:(len-i),sched,iv);
- if (k < 0)
- return(k);
- else
- j+=k;
- }
- return(j);
- }
+ /* lets recurse if we want to send the data in small chunks */
+ if (len > MAXWRITE) {
+ j = 0;
+ for (i = 0; i < len; i += k) {
+ k = DES_enc_write(fd, &(buf[i]),
+ ((len - i) > MAXWRITE) ? MAXWRITE : (len - i),
+ sched, iv);
+ if (k < 0)
+ return (k);
+ else
+ j += k;
+ }
+ return (j);
+ }
- /* write length first */
- p=outbuf;
- l2n(len,p);
+ /* write length first */
+ p = outbuf;
+ l2n(len, p);
- /* pad short strings */
- if (len < 8)
- {
- p=shortbuf;
- memcpy(shortbuf,buf,(unsigned int)len);
- for (i=len; i<8; i++)
- shortbuf[i]=random();
- rnum=8;
- }
- else
- {
- p=buf;
- rnum=((len+7)/8*8); /* round up to nearest eight */
- }
+ /* pad short strings */
+ if (len < 8) {
+ cp = shortbuf;
+ memcpy(shortbuf, buf, len);
+ RAND_pseudo_bytes(shortbuf + len, 8 - len);
+ rnum = 8;
+ } else {
+ cp = buf;
+ rnum = ((len + 7) / 8 * 8); /* round up to nearest eight */
+ }
- if (des_rw_mode & DES_PCBC_MODE)
- des_pcbc_encrypt((des_cblock *)p,
- (des_cblock *)&(outbuf[HDRSIZE]),
- (long)((len<8)?8:len),sched,iv,DES_ENCRYPT);
- else
- des_cbc_encrypt((des_cblock *)p,
- (des_cblock *)&(outbuf[HDRSIZE]),
- (long)((len<8)?8:len),sched,iv,DES_ENCRYPT);
+ if (DES_rw_mode & DES_PCBC_MODE)
+ DES_pcbc_encrypt(cp, &(outbuf[HDRSIZE]), (len < 8) ? 8 : len, sched,
+ iv, DES_ENCRYPT);
+ else
+ DES_cbc_encrypt(cp, &(outbuf[HDRSIZE]), (len < 8) ? 8 : len, sched,
+ iv, DES_ENCRYPT);
- /* output */
- outnum=(int)rnum+HDRSIZE;
+ /* output */
+ outnum = rnum + HDRSIZE;
- for (j=0; j<outnum; j+=i)
- {
- /* eay 26/08/92 I was not doing writing from where we
- * got upto. */
- i=write(fd,&(outbuf[j]),(unsigned int)(outnum-j));
- if (i == -1)
- {
- if (errno == EINTR)
- i=0;
- else /* This is really a bad error - very bad
- * It will stuff-up both ends. */
- return(-1);
- }
- }
+ for (j = 0; j < outnum; j += i) {
+ /*
+ * eay 26/08/92 I was not doing writing from where we got up to.
+ */
+# ifndef _WIN32
+ i = write(fd, (void *)&(outbuf[j]), outnum - j);
+# else
+ i = _write(fd, (void *)&(outbuf[j]), outnum - j);
+# endif
+ if (i == -1) {
+# ifdef EINTR
+ if (errno == EINTR)
+ i = 0;
+ else
+# endif
+ /*
+ * This is really a bad error - very bad It will stuff-up
+ * both ends.
+ */
+ return (-1);
+ }
+ }
- return(len);
- }
+ return (len);
+#endif /* OPENSSL_NO_POSIX_IO */
+}
projects / openssl.git / blobdiff