* 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
* [including the GNU Public Licence.]
*/
-
-
#include <stdio.h>
#include "cryptlib.h"
#include <openssl/bn.h>
#include <openssl/rand.h>
int RSA_padding_add_SSLv23(unsigned char *to, int tlen,
- const unsigned char *from, int flen)
- {
- int i,j;
- unsigned char *p;
-
- if (flen > (tlen-11))
- {
- RSAerr(RSA_F_RSA_PADDING_ADD_SSLV23,RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
- return(0);
- }
-
- p=(unsigned char *)to;
-
- *(p++)=0;
- *(p++)=2; /* Public Key BT (Block Type) */
-
- /* pad out with non-zero random data */
- j=tlen-3-8-flen;
-
- if (RAND_bytes(p,j) <= 0)
- return(0);
- for (i=0; i<j; i++)
- {
- if (*p == '\0')
- do {
- if (RAND_bytes(p,1) <= 0)
- return(0);
- } while (*p == '\0');
- p++;
- }
-
- memset(p,3,8);
- p+=8;
- *(p++)='\0';
-
- memcpy(p,from,(unsigned int)flen);
- return(1);
- }
+ const unsigned char *from, int flen)
+{
+ int i, j;
+ unsigned char *p;
+
+ if (flen > (tlen - 11)) {
+ RSAerr(RSA_F_RSA_PADDING_ADD_SSLV23,
+ RSA_R_DATA_TOO_LARGE_FOR_KEY_SIZE);
+ return (0);
+ }
+
+ p = (unsigned char *)to;
+
+ *(p++) = 0;
+ *(p++) = 2; /* Public Key BT (Block Type) */
+
+ /* pad out with non-zero random data */
+ j = tlen - 3 - 8 - flen;
+
+ if (RAND_bytes(p, j) <= 0)
+ return (0);
+ for (i = 0; i < j; i++) {
+ if (*p == '\0')
+ do {
+ if (RAND_bytes(p, 1) <= 0)
+ return (0);
+ } while (*p == '\0');
+ p++;
+ }
+
+ memset(p, 3, 8);
+ p += 8;
+ *(p++) = '\0';
+
+ memcpy(p, from, (unsigned int)flen);
+ return (1);
+}
int RSA_padding_check_SSLv23(unsigned char *to, int tlen,
- const unsigned char *from, int flen, int num)
- {
- int i,j,k;
- const unsigned char *p;
-
- p=from;
- if (flen < 10)
- {
- RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,RSA_R_DATA_TOO_SMALL);
- return(-1);
- }
- if ((num != (flen+1)) || (*(p++) != 02))
- {
- RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,RSA_R_BLOCK_TYPE_IS_NOT_02);
- return(-1);
- }
-
- /* scan over padding data */
- j=flen-1; /* one for type */
- for (i=0; i<j; i++)
- if (*(p++) == 0) break;
-
- if ((i == j) || (i < 8))
- {
- RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,RSA_R_NULL_BEFORE_BLOCK_MISSING);
- return(-1);
- }
- for (k = -9; k<-1; k++)
- {
- if (p[k] != 0x03) break;
- }
- if (k == -1)
- {
- RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,RSA_R_SSLV3_ROLLBACK_ATTACK);
- return(-1);
- }
-
- i++; /* Skip over the '\0' */
- j-=i;
- if (j > tlen)
- {
- RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,RSA_R_DATA_TOO_LARGE);
- return(-1);
- }
- memcpy(to,p,(unsigned int)j);
-
- return(j);
- }
-
+ const unsigned char *from, int flen, int num)
+{
+ int i, j, k;
+ const unsigned char *p;
+
+ p = from;
+ if (flen < 10) {
+ RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23, RSA_R_DATA_TOO_SMALL);
+ return (-1);
+ }
+ if ((num != (flen + 1)) || (*(p++) != 02)) {
+ RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23, RSA_R_BLOCK_TYPE_IS_NOT_02);
+ return (-1);
+ }
+
+ /* scan over padding data */
+ j = flen - 1; /* one for type */
+ for (i = 0; i < j; i++)
+ if (*(p++) == 0)
+ break;
+
+ if ((i == j) || (i < 8)) {
+ RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23,
+ RSA_R_NULL_BEFORE_BLOCK_MISSING);
+ return (-1);
+ }
+ for (k = -9; k < -1; k++) {
+ if (p[k] != 0x03)
+ break;
+ }
+ if (k == -1) {
+ RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23, RSA_R_SSLV3_ROLLBACK_ATTACK);
+ return (-1);
+ }
+
+ i++; /* Skip over the '\0' */
+ j -= i;
+ if (j > tlen) {
+ RSAerr(RSA_F_RSA_PADDING_CHECK_SSLV23, RSA_R_DATA_TOO_LARGE);
+ return (-1);
+ }
+ memcpy(to, p, (unsigned int)j);
+
+ return (j);
+}
projects / openssl.git / blobdiff