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-rw-r--r--bufaux.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/bufaux.c b/bufaux.c
index 80abe890b..d3dc674ce 100644
--- a/bufaux.c
+++ b/bufaux.c
@@ -37,7 +37,7 @@
37 */ 37 */
38 38
39#include "includes.h" 39#include "includes.h"
40RCSID("$OpenBSD: bufaux.c,v 1.26 2002/06/23 09:46:51 deraadt Exp $"); 40RCSID("$OpenBSD: bufaux.c,v 1.27 2002/06/26 08:53:12 markus Exp $");
41 41
42#include <openssl/bn.h> 42#include <openssl/bn.h>
43#include "bufaux.h" 43#include "bufaux.h"
@@ -88,6 +88,8 @@ buffer_get_bignum(Buffer *buffer, BIGNUM *value)
88 bits = GET_16BIT(buf); 88 bits = GET_16BIT(buf);
89 /* Compute the number of binary bytes that follow. */ 89 /* Compute the number of binary bytes that follow. */
90 bytes = (bits + 7) / 8; 90 bytes = (bits + 7) / 8;
91 if (bytes > 8 * 1024)
92 fatal("buffer_get_bignum: cannot handle BN of size %d", bytes);
91 if (buffer_len(buffer) < bytes) 93 if (buffer_len(buffer) < bytes)
92 fatal("buffer_get_bignum: input buffer too small"); 94 fatal("buffer_get_bignum: input buffer too small");
93 bin = buffer_ptr(buffer); 95 bin = buffer_ptr(buffer);
@@ -129,13 +131,15 @@ buffer_put_bignum2(Buffer *buffer, BIGNUM *value)
129 xfree(buf); 131 xfree(buf);
130} 132}
131 133
134/* XXX does not handle negative BNs */
132void 135void
133buffer_get_bignum2(Buffer *buffer, BIGNUM *value) 136buffer_get_bignum2(Buffer *buffer, BIGNUM *value)
134{ 137{
135 /**XXX should be two's-complement */ 138 u_int len;
136 int len; 139 u_char *bin = buffer_get_string(buffer, &len);
137 u_char *bin = buffer_get_string(buffer, (u_int *)&len);
138 140
141 if (len > 8 * 1024)
142 fatal("buffer_get_bignum2: cannot handle BN of size %d", len);
139 BN_bin2bn(bin, len, value); 143 BN_bin2bn(bin, len, value);
140 xfree(bin); 144 xfree(bin);
141} 145}