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-rw-r--r--crypto/dh/dh_check.c139
1 files changed, 72 insertions, 67 deletions
diff --git a/crypto/dh/dh_check.c b/crypto/dh/dh_check.c
index 066898174e39..c39ed97ba627 100644
--- a/crypto/dh/dh_check.c
+++ b/crypto/dh/dh_check.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
@@ -61,7 +61,8 @@
#include <openssl/bn.h>
#include <openssl/dh.h>
-/* Check that p is a safe prime and
+/*-
+ * Check that p is a safe prime and
* if g is 2, 3 or 5, check that it is a suitable generator
* where
* for 2, p mod 24 == 11
@@ -71,72 +72,76 @@
*/
int DH_check(const DH *dh, int *ret)
- {
- int ok=0;
- BN_CTX *ctx=NULL;
- BN_ULONG l;
- BIGNUM *q=NULL;
+{
+ int ok = 0;
+ BN_CTX *ctx = NULL;
+ BN_ULONG l;
+ BIGNUM *q = NULL;
- *ret=0;
- ctx=BN_CTX_new();
- if (ctx == NULL) goto err;
- q=BN_new();
- if (q == NULL) goto err;
+ *ret = 0;
+ ctx = BN_CTX_new();
+ if (ctx == NULL)
+ goto err;
+ q = BN_new();
+ if (q == NULL)
+ goto err;
- if (BN_is_word(dh->g,DH_GENERATOR_2))
- {
- l=BN_mod_word(dh->p,24);
- if (l != 11) *ret|=DH_NOT_SUITABLE_GENERATOR;
- }
+ if (BN_is_word(dh->g, DH_GENERATOR_2)) {
+ l = BN_mod_word(dh->p, 24);
+ if (l != 11)
+ *ret |= DH_NOT_SUITABLE_GENERATOR;
+ }
#if 0
- else if (BN_is_word(dh->g,DH_GENERATOR_3))
- {
- l=BN_mod_word(dh->p,12);
- if (l != 5) *ret|=DH_NOT_SUITABLE_GENERATOR;
- }
+ else if (BN_is_word(dh->g, DH_GENERATOR_3)) {
+ l = BN_mod_word(dh->p, 12);
+ if (l != 5)
+ *ret |= DH_NOT_SUITABLE_GENERATOR;
+ }
#endif
- else if (BN_is_word(dh->g,DH_GENERATOR_5))
- {
- l=BN_mod_word(dh->p,10);
- if ((l != 3) && (l != 7))
- *ret|=DH_NOT_SUITABLE_GENERATOR;
- }
- else
- *ret|=DH_UNABLE_TO_CHECK_GENERATOR;
+ else if (BN_is_word(dh->g, DH_GENERATOR_5)) {
+ l = BN_mod_word(dh->p, 10);
+ if ((l != 3) && (l != 7))
+ *ret |= DH_NOT_SUITABLE_GENERATOR;
+ } else
+ *ret |= DH_UNABLE_TO_CHECK_GENERATOR;
- if (!BN_is_prime_ex(dh->p,BN_prime_checks,ctx,NULL))
- *ret|=DH_CHECK_P_NOT_PRIME;
- else
- {
- if (!BN_rshift1(q,dh->p)) goto err;
- if (!BN_is_prime_ex(q,BN_prime_checks,ctx,NULL))
- *ret|=DH_CHECK_P_NOT_SAFE_PRIME;
- }
- ok=1;
-err:
- if (ctx != NULL) BN_CTX_free(ctx);
- if (q != NULL) BN_free(q);
- return(ok);
- }
+ if (!BN_is_prime_ex(dh->p, BN_prime_checks, ctx, NULL))
+ *ret |= DH_CHECK_P_NOT_PRIME;
+ else {
+ if (!BN_rshift1(q, dh->p))
+ goto err;
+ if (!BN_is_prime_ex(q, BN_prime_checks, ctx, NULL))
+ *ret |= DH_CHECK_P_NOT_SAFE_PRIME;
+ }
+ ok = 1;
+ err:
+ if (ctx != NULL)
+ BN_CTX_free(ctx);
+ if (q != NULL)
+ BN_free(q);
+ return (ok);
+}
int DH_check_pub_key(const DH *dh, const BIGNUM *pub_key, int *ret)
- {
- int ok=0;
- BIGNUM *q=NULL;
+{
+ int ok = 0;
+ BIGNUM *q = NULL;
- *ret=0;
- q=BN_new();
- if (q == NULL) goto err;
- BN_set_word(q,1);
- if (BN_cmp(pub_key,q)<=0)
- *ret|=DH_CHECK_PUBKEY_TOO_SMALL;
- BN_copy(q,dh->p);
- BN_sub_word(q,1);
- if (BN_cmp(pub_key,q)>=0)
- *ret|=DH_CHECK_PUBKEY_TOO_LARGE;
+ *ret = 0;
+ q = BN_new();
+ if (q == NULL)
+ goto err;
+ BN_set_word(q, 1);
+ if (BN_cmp(pub_key, q) <= 0)
+ *ret |= DH_CHECK_PUBKEY_TOO_SMALL;
+ BN_copy(q, dh->p);
+ BN_sub_word(q, 1);
+ if (BN_cmp(pub_key, q) >= 0)
+ *ret |= DH_CHECK_PUBKEY_TOO_LARGE;
- ok = 1;
-err:
- if (q != NULL) BN_free(q);
- return(ok);
- }
+ ok = 1;
+ err:
+ if (q != NULL)
+ BN_free(q);
+ return (ok);
+}