This commit was generated by cvs2git to track changes on a CVS vendor

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3 files changed, 34 insertions, 1 deletions

diff --git a/src/lib/libcrypto/jpake/jpake.c b/src/lib/libcrypto/jpake/jpake.c
index 086d9f47e0..8e4b633ccc 100644
--- a/src/lib/libcrypto/jpake/jpake.c
+++ b/src/lib/libcrypto/jpake/jpake.c
@@ -282,8 +282,37 @@ int JPAKE_STEP1_generate(JPAKE_STEP1 *send, JPAKE_CTX *ctx)
     return 1;
     }
 
+/* g^x is a legal value */
+static int is_legal(const BIGNUM *gx, const JPAKE_CTX *ctx)
+    {
+    BIGNUM *t;
+    int res;
+    
+    if(BN_is_negative(gx) || BN_is_zero(gx) || BN_cmp(gx, ctx->p.p) >= 0)
+        return 0;
+
+    t = BN_new();
+    BN_mod_exp(t, gx, ctx->p.q, ctx->p.p, ctx->ctx);
+    res = BN_is_one(t);
+    BN_free(t);
+
+    return res;
+    }
+
 int JPAKE_STEP1_process(JPAKE_CTX *ctx, const JPAKE_STEP1 *received)
     {
+    if(!is_legal(received->p1.gx, ctx))
+        {
+        JPAKEerr(JPAKE_F_JPAKE_STEP1_PROCESS, JPAKE_R_G_TO_THE_X3_IS_NOT_LEGAL);
+        return 0;
+        }
+
+    if(!is_legal(received->p2.gx, ctx))
+        {
+        JPAKEerr(JPAKE_F_JPAKE_STEP1_PROCESS, JPAKE_R_G_TO_THE_X4_IS_NOT_LEGAL);
+        return 0;
+        }
+
    /* verify their ZKP(xc) */
     if(!verify_zkp(&received->p1, ctx->p.g, ctx))
         {
diff --git a/src/lib/libcrypto/jpake/jpake.h b/src/lib/libcrypto/jpake/jpake.h
index 693ea188cb..fd143b4d9b 100644
--- a/src/lib/libcrypto/jpake/jpake.h
+++ b/src/lib/libcrypto/jpake/jpake.h
@@ -115,6 +115,8 @@ void ERR_load_JPAKE_strings(void);
 #define JPAKE_F_VERIFY_ZKP                               100
 
 /* Reason codes. */
+#define JPAKE_R_G_TO_THE_X3_IS_NOT_LEGAL                 108
+#define JPAKE_R_G_TO_THE_X4_IS_NOT_LEGAL                 109
 #define JPAKE_R_G_TO_THE_X4_IS_ONE                       105
 #define JPAKE_R_HASH_OF_HASH_OF_KEY_MISMATCH             106
 #define JPAKE_R_HASH_OF_KEY_MISMATCH                     107
diff --git a/src/lib/libcrypto/jpake/jpake_err.c b/src/lib/libcrypto/jpake/jpake_err.c
index 1b95067967..a9a9dee75c 100644
--- a/src/lib/libcrypto/jpake/jpake_err.c
+++ b/src/lib/libcrypto/jpake/jpake_err.c
@@ -1,6 +1,6 @@
 /* crypto/jpake/jpake_err.c */
 /* ====================================================================
- * Copyright (c) 1999-2008 The OpenSSL Project.  All rights reserved.
+ * Copyright (c) 1999-2010 The OpenSSL Project.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -80,6 +80,8 @@ static ERR_STRING_DATA JPAKE_str_functs[]=
 
 static ERR_STRING_DATA JPAKE_str_reasons[]=
         {
+{ERR_REASON(JPAKE_R_G_TO_THE_X3_IS_NOT_LEGAL),"g to the x3 is not legal"},
+{ERR_REASON(JPAKE_R_G_TO_THE_X4_IS_NOT_LEGAL),"g to the x4 is not legal"},
 {ERR_REASON(JPAKE_R_G_TO_THE_X4_IS_ONE)  ,"g to the x4 is one"},
 {ERR_REASON(JPAKE_R_HASH_OF_HASH_OF_KEY_MISMATCH),"hash of hash of key mismatch"},
 {ERR_REASON(JPAKE_R_HASH_OF_KEY_MISMATCH),"hash of key mismatch"},