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-rw-r--r--crypto/des/enc_read.c321
1 files changed, 158 insertions, 163 deletions
diff --git a/crypto/des/enc_read.c b/crypto/des/enc_read.c
index edb6620d0856..fcb66541bdd1 100644
--- a/crypto/des/enc_read.c
+++ b/crypto/des/enc_read.c
@@ -5,21 +5,21 @@
* 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:
@@ -34,10 +34,10 @@
* 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
@@ -49,7 +49,7 @@
* 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
@@ -62,11 +62,12 @@
#include "des_locl.h"
/* This has some uglies in it but it works - even over sockets. */
-/*extern int errno;*/
-OPENSSL_IMPLEMENT_GLOBAL(int,DES_rw_mode,DES_PCBC_MODE)
-
-
/*
+ * extern int errno;
+ */
+OPENSSL_IMPLEMENT_GLOBAL(int, DES_rw_mode, DES_PCBC_MODE)
+
+/*-
* WARNINGS:
*
* - The data format used by DES_enc_write() and DES_enc_read()
@@ -82,159 +83,153 @@ OPENSSL_IMPLEMENT_GLOBAL(int,DES_rw_mode,DES_PCBC_MODE)
* - This function uses an internal state and thus cannot be
* used on multiple files.
*/
-
-
int DES_enc_read(int fd, void *buf, int len, DES_key_schedule *sched,
- DES_cblock *iv)
- {
+ DES_cblock *iv)
+{
#if defined(OPENSSL_NO_POSIX_IO)
- return(0);
+ return (0);
#else
- /* data to be unencrypted */
- int net_num=0;
- static unsigned char *net=NULL;
- /* extra unencrypted data
- * for when a block of 100 comes in but is des_read one byte at
- * a time. */
- static unsigned char *unnet=NULL;
- static int unnet_start=0;
- static int unnet_left=0;
- static unsigned char *tmpbuf=NULL;
- int i;
- long num=0,rnum;
- unsigned char *p;
-
- if (tmpbuf == NULL)
- {
- tmpbuf=OPENSSL_malloc(BSIZE);
- if (tmpbuf == NULL) return(-1);
- }
- if (net == NULL)
- {
- net=OPENSSL_malloc(BSIZE);
- if (net == NULL) return(-1);
- }
- if (unnet == NULL)
- {
- unnet=OPENSSL_malloc(BSIZE);
- if (unnet == NULL) return(-1);
- }
- /* left over data from last decrypt */
- if (unnet_left != 0)
- {
- if (unnet_left < len)
- {
- /* we still still need more data but will return
- * with the number of bytes we have - should always
- * check the return value */
- memcpy(buf,&(unnet[unnet_start]),
- unnet_left);
- /* eay 26/08/92 I had the next 2 lines
- * reversed :-( */
- i=unnet_left;
- unnet_start=unnet_left=0;
- }
- else
- {
- memcpy(buf,&(unnet[unnet_start]),len);
- unnet_start+=len;
- unnet_left-=len;
- i=len;
- }
- return(i);
- }
-
- /* We need to get more data. */
- if (len > MAXWRITE) len=MAXWRITE;
-
- /* first - get the length */
- while (net_num < HDRSIZE)
- {
-#ifndef OPENSSL_SYS_WIN32
- i=read(fd,(void *)&(net[net_num]),HDRSIZE-net_num);
-#else
- i=_read(fd,(void *)&(net[net_num]),HDRSIZE-net_num);
-#endif
-#ifdef EINTR
- if ((i == -1) && (errno == EINTR)) continue;
-#endif
- if (i <= 0) return(0);
- net_num+=i;
- }
-
- /* we now have at net_num bytes in net */
- p=net;
- /* num=0; */
- n2l(p,num);
- /* num should be rounded up to the next group of eight
- * we make sure that we have read a multiple of 8 bytes from the net.
- */
- if ((num > MAXWRITE) || (num < 0)) /* error */
- return(-1);
- rnum=(num < 8)?8:((num+7)/8*8);
-
- net_num=0;
- while (net_num < rnum)
- {
-#ifndef OPENSSL_SYS_WIN32
- i=read(fd,(void *)&(net[net_num]),rnum-net_num);
-#else
- i=_read(fd,(void *)&(net[net_num]),rnum-net_num);
-#endif
-#ifdef EINTR
- if ((i == -1) && (errno == EINTR)) continue;
-#endif
- if (i <= 0) return(0);
- net_num+=i;
- }
-
- /* Check if there will be data left over. */
- if (len < num)
- {
- if (DES_rw_mode & DES_PCBC_MODE)
- DES_pcbc_encrypt(net,unnet,num,sched,iv,DES_DECRYPT);
- else
- DES_cbc_encrypt(net,unnet,num,sched,iv,DES_DECRYPT);
- memcpy(buf,unnet,len);
- unnet_start=len;
- unnet_left=num-len;
-
- /* The following line is done because we return num
- * as the number of bytes read. */
- num=len;
- }
- else
- {
- /* >output is a multiple of 8 byes, if len < rnum
- * >we must be careful. The user must be aware that this
- * >routine will write more bytes than he asked for.
- * >The length of the buffer must be correct.
- * FIXED - Should be ok now 18-9-90 - eay */
- if (len < rnum)
- {
-
- if (DES_rw_mode & DES_PCBC_MODE)
- DES_pcbc_encrypt(net,tmpbuf,num,sched,iv,
- DES_DECRYPT);
- else
- DES_cbc_encrypt(net,tmpbuf,num,sched,iv,
- DES_DECRYPT);
-
- /* eay 26/08/92 fix a bug that returned more
- * bytes than you asked for (returned len bytes :-( */
- memcpy(buf,tmpbuf,num);
- }
- else
- {
- if (DES_rw_mode & DES_PCBC_MODE)
- DES_pcbc_encrypt(net,buf,num,sched,iv,
- DES_DECRYPT);
- else
- DES_cbc_encrypt(net,buf,num,sched,iv,
- DES_DECRYPT);
- }
- }
- return num;
-#endif /* OPENSSL_NO_POSIX_IO */
- }
-
+ /* data to be unencrypted */
+ int net_num = 0;
+ static unsigned char *net = NULL;
+ /*
+ * extra unencrypted data for when a block of 100 comes in but is
+ * des_read one byte at a time.
+ */
+ static unsigned char *unnet = NULL;
+ static int unnet_start = 0;
+ static int unnet_left = 0;
+ static unsigned char *tmpbuf = NULL;
+ int i;
+ long num = 0, rnum;
+ unsigned char *p;
+
+ if (tmpbuf == NULL) {
+ tmpbuf = OPENSSL_malloc(BSIZE);
+ if (tmpbuf == NULL)
+ return (-1);
+ }
+ if (net == NULL) {
+ net = OPENSSL_malloc(BSIZE);
+ if (net == NULL)
+ return (-1);
+ }
+ if (unnet == NULL) {
+ unnet = OPENSSL_malloc(BSIZE);
+ if (unnet == NULL)
+ return (-1);
+ }
+ /* left over data from last decrypt */
+ if (unnet_left != 0) {
+ if (unnet_left < len) {
+ /*
+ * we still still need more data but will return with the number
+ * of bytes we have - should always check the return value
+ */
+ memcpy(buf, &(unnet[unnet_start]), unnet_left);
+ /*
+ * eay 26/08/92 I had the next 2 lines reversed :-(
+ */
+ i = unnet_left;
+ unnet_start = unnet_left = 0;
+ } else {
+ memcpy(buf, &(unnet[unnet_start]), len);
+ unnet_start += len;
+ unnet_left -= len;
+ i = len;
+ }
+ return (i);
+ }
+
+ /* We need to get more data. */
+ if (len > MAXWRITE)
+ len = MAXWRITE;
+
+ /* first - get the length */
+ while (net_num < HDRSIZE) {
+# ifndef OPENSSL_SYS_WIN32
+ i = read(fd, (void *)&(net[net_num]), HDRSIZE - net_num);
+# else
+ i = _read(fd, (void *)&(net[net_num]), HDRSIZE - net_num);
+# endif
+# ifdef EINTR
+ if ((i == -1) && (errno == EINTR))
+ continue;
+# endif
+ if (i <= 0)
+ return (0);
+ net_num += i;
+ }
+
+ /* we now have at net_num bytes in net */
+ p = net;
+ /* num=0; */
+ n2l(p, num);
+ /*
+ * num should be rounded up to the next group of eight we make sure that
+ * we have read a multiple of 8 bytes from the net.
+ */
+ if ((num > MAXWRITE) || (num < 0)) /* error */
+ return (-1);
+ rnum = (num < 8) ? 8 : ((num + 7) / 8 * 8);
+
+ net_num = 0;
+ while (net_num < rnum) {
+# ifndef OPENSSL_SYS_WIN32
+ i = read(fd, (void *)&(net[net_num]), rnum - net_num);
+# else
+ i = _read(fd, (void *)&(net[net_num]), rnum - net_num);
+# endif
+# ifdef EINTR
+ if ((i == -1) && (errno == EINTR))
+ continue;
+# endif
+ if (i <= 0)
+ return (0);
+ net_num += i;
+ }
+
+ /* Check if there will be data left over. */
+ if (len < num) {
+ if (DES_rw_mode & DES_PCBC_MODE)
+ DES_pcbc_encrypt(net, unnet, num, sched, iv, DES_DECRYPT);
+ else
+ DES_cbc_encrypt(net, unnet, num, sched, iv, DES_DECRYPT);
+ memcpy(buf, unnet, len);
+ unnet_start = len;
+ unnet_left = num - len;
+
+ /*
+ * The following line is done because we return num as the number of
+ * bytes read.
+ */
+ num = len;
+ } else {
+ /*-
+ * >output is a multiple of 8 byes, if len < rnum
+ * >we must be careful. The user must be aware that this
+ * >routine will write more bytes than he asked for.
+ * >The length of the buffer must be correct.
+ * FIXED - Should be ok now 18-9-90 - eay */
+ if (len < rnum) {
+
+ if (DES_rw_mode & DES_PCBC_MODE)
+ DES_pcbc_encrypt(net, tmpbuf, num, sched, iv, DES_DECRYPT);
+ else
+ DES_cbc_encrypt(net, tmpbuf, num, sched, iv, DES_DECRYPT);
+
+ /*
+ * eay 26/08/92 fix a bug that returned more bytes than you asked
+ * for (returned len bytes :-(
+ */
+ memcpy(buf, tmpbuf, num);
+ } else {
+ if (DES_rw_mode & DES_PCBC_MODE)
+ DES_pcbc_encrypt(net, buf, num, sched, iv, DES_DECRYPT);
+ else
+ DES_cbc_encrypt(net, buf, num, sched, iv, DES_DECRYPT);
+ }
+ }
+ return num;
+#endif /* OPENSSL_NO_POSIX_IO */
+}