1 files changed, 17 insertions, 114 deletions

diff --git a/src/lib/libcrypto/rsa/rsa_eay.c b/src/lib/libcrypto/rsa/rsa_eay.c
index 027b4dc754..a3f549d8e6 100644
--- a/src/lib/libcrypto/rsa/rsa_eay.c
+++ b/src/lib/libcrypto/rsa/rsa_eay.c
@@ -61,6 +61,7 @@
 #include <openssl/bn.h>
 #include <openssl/rsa.h>
 #include <openssl/rand.h>
+#include <openssl/engine.h>
 
 #ifndef RSA_NULL
 
@@ -186,7 +187,7 @@ err:
         BN_clear_free(&ret);
         if (buf != NULL) 
                 {
-                OPENSSL_cleanse(buf,num);
+                memset(buf,0,num);
                 OPENSSL_free(buf);
                 }
         return(r);
@@ -205,46 +206,12 @@ static int rsa_eay_blinding(RSA *rsa, BN_CTX *ctx)
 
 #define BLINDING_HELPER(rsa, ctx, err_instr) \
         do { \
-                if((!((rsa)->flags & RSA_FLAG_NO_BLINDING)) && \
-                    ((rsa)->blinding == NULL) && \
-                    !rsa_eay_blinding(rsa, ctx)) \
-                    err_instr \
+                if(((rsa)->flags & RSA_FLAG_BLINDING) && \
+                                ((rsa)->blinding == NULL) && \
+                                !rsa_eay_blinding(rsa, ctx)) \
+                        err_instr \
         } while(0)
 
-static BN_BLINDING *setup_blinding(RSA *rsa, BN_CTX *ctx)
-        {
-        BIGNUM *A, *Ai;
-        BN_BLINDING *ret = NULL;
-
-        /* added in OpenSSL 0.9.6j and 0.9.7b */
-
-        /* NB: similar code appears in RSA_blinding_on (rsa_lib.c);
-         * this should be placed in a new function of its own, but for reasons
-         * of binary compatibility can't */
-
-        BN_CTX_start(ctx);
-        A = BN_CTX_get(ctx);
-        if ((RAND_status() == 0) && rsa->d != NULL && rsa->d->d != NULL)
-                {
-                /* if PRNG is not properly seeded, resort to secret exponent as unpredictable seed */
-                RAND_add(rsa->d->d, rsa->d->dmax * sizeof rsa->d->d[0], 0);
-                if (!BN_pseudo_rand_range(A,rsa->n)) goto err;
-                }
-        else
-                {
-                if (!BN_rand_range(A,rsa->n)) goto err;
-                }
-        if ((Ai=BN_mod_inverse(NULL,A,rsa->n,ctx)) == NULL) goto err;
-
-        if (!rsa->meth->bn_mod_exp(A,A,rsa->e,rsa->n,ctx,rsa->_method_mod_n))
-                goto err;
-        ret = BN_BLINDING_new(A,Ai,rsa->n);
-        BN_free(Ai);
-err:
-        BN_CTX_end(ctx);
-        return ret;
-        }
-
 /* signing */
 static int RSA_eay_private_encrypt(int flen, const unsigned char *from,
              unsigned char *to, RSA *rsa, int padding)
@@ -253,8 +220,6 @@ static int RSA_eay_private_encrypt(int flen, const unsigned char *from,
         int i,j,k,num=0,r= -1;
         unsigned char *buf=NULL;
         BN_CTX *ctx=NULL;
-        int local_blinding = 0;
-        BN_BLINDING *blinding = NULL;
 
         BN_init(&f);
         BN_init(&ret);
@@ -292,38 +257,9 @@ static int RSA_eay_private_encrypt(int flen, const unsigned char *from,
                 }
 
         BLINDING_HELPER(rsa, ctx, goto err;);
-        blinding = rsa->blinding;
-        
-        /* Now unless blinding is disabled, 'blinding' is non-NULL.
-         * But the BN_BLINDING object may be owned by some other thread
-         * (we don't want to keep it constant and we don't want to use
-         * lots of locking to avoid race conditions, so only a single
-         * thread can use it; other threads have to use local blinding
-         * factors) */
-        if (!(rsa->flags & RSA_FLAG_NO_BLINDING))
-                {
-                if (blinding == NULL)
-                        {
-                        RSAerr(RSA_F_RSA_EAY_PRIVATE_ENCRYPT, ERR_R_INTERNAL_ERROR);
-                        goto err;
-                        }
-                }
-        
-        if (blinding != NULL)
-                {
-                if (blinding->thread_id != CRYPTO_thread_id())
-                        {
-                        /* we need a local one-time blinding factor */
-
-                        blinding = setup_blinding(rsa, ctx);
-                        if (blinding == NULL)
-                                goto err;
-                        local_blinding = 1;
-                        }
-                }
 
-        if (blinding)
-                if (!BN_BLINDING_convert(&f, blinding, ctx)) goto err;
+        if (rsa->flags & RSA_FLAG_BLINDING)
+                if (!BN_BLINDING_convert(&f,rsa->blinding,ctx)) goto err;
 
         if ( (rsa->flags & RSA_FLAG_EXT_PKEY) ||
                 ((rsa->p != NULL) &&
@@ -337,8 +273,8 @@ static int RSA_eay_private_encrypt(int flen, const unsigned char *from,
                 if (!rsa->meth->bn_mod_exp(&ret,&f,rsa->d,rsa->n,ctx,NULL)) goto err;
                 }
 
-        if (blinding)
-                if (!BN_BLINDING_invert(&ret, blinding, ctx)) goto err;
+        if (rsa->flags & RSA_FLAG_BLINDING)
+                if (!BN_BLINDING_invert(&ret,rsa->blinding,ctx)) goto err;
 
         /* put in leading 0 bytes if the number is less than the
          * length of the modulus */
@@ -352,11 +288,9 @@ err:
         if (ctx != NULL) BN_CTX_free(ctx);
         BN_clear_free(&ret);
         BN_clear_free(&f);
-        if (local_blinding)
-                BN_BLINDING_free(blinding);
         if (buf != NULL)
                 {
-                OPENSSL_cleanse(buf,num);
+                memset(buf,0,num);
                 OPENSSL_free(buf);
                 }
         return(r);
@@ -370,8 +304,6 @@ static int RSA_eay_private_decrypt(int flen, const unsigned char *from,
         unsigned char *p;
         unsigned char *buf=NULL;
         BN_CTX *ctx=NULL;
-        int local_blinding = 0;
-        BN_BLINDING *blinding = NULL;
 
         BN_init(&f);
         BN_init(&ret);
@@ -404,38 +336,9 @@ static int RSA_eay_private_decrypt(int flen, const unsigned char *from,
                 }
 
         BLINDING_HELPER(rsa, ctx, goto err;);
-        blinding = rsa->blinding;
-        
-        /* Now unless blinding is disabled, 'blinding' is non-NULL.
-         * But the BN_BLINDING object may be owned by some other thread
-         * (we don't want to keep it constant and we don't want to use
-         * lots of locking to avoid race conditions, so only a single
-         * thread can use it; other threads have to use local blinding
-         * factors) */
-        if (!(rsa->flags & RSA_FLAG_NO_BLINDING))
-                {
-                if (blinding == NULL)
-                        {
-                        RSAerr(RSA_F_RSA_EAY_PRIVATE_DECRYPT, ERR_R_INTERNAL_ERROR);
-                        goto err;
-                        }
-                }
-        
-        if (blinding != NULL)
-                {
-                if (blinding->thread_id != CRYPTO_thread_id())
-                        {
-                        /* we need a local one-time blinding factor */
-
-                        blinding = setup_blinding(rsa, ctx);
-                        if (blinding == NULL)
-                                goto err;
-                        local_blinding = 1;
-                        }
-                }
 
-        if (blinding)
-                if (!BN_BLINDING_convert(&f, blinding, ctx)) goto err;
+        if (rsa->flags & RSA_FLAG_BLINDING)
+                if (!BN_BLINDING_convert(&f,rsa->blinding,ctx)) goto err;
 
         /* do the decrypt */
         if ( (rsa->flags & RSA_FLAG_EXT_PKEY) ||
@@ -451,8 +354,8 @@ static int RSA_eay_private_decrypt(int flen, const unsigned char *from,
                         goto err;
                 }
 
-        if (blinding)
-                if (!BN_BLINDING_invert(&ret, blinding, ctx)) goto err;
+        if (rsa->flags & RSA_FLAG_BLINDING)
+                if (!BN_BLINDING_invert(&ret,rsa->blinding,ctx)) goto err;
 
         p=buf;
         j=BN_bn2bin(&ret,p); /* j is only used with no-padding mode */
@@ -486,7 +389,7 @@ err:
         BN_clear_free(&ret);
         if (buf != NULL)
                 {
-                OPENSSL_cleanse(buf,num);
+                memset(buf,0,num);
                 OPENSSL_free(buf);
                 }
         return(r);
@@ -583,7 +486,7 @@ err:
         BN_clear_free(&ret);
         if (buf != NULL)
                 {
-                OPENSSL_cleanse(buf,num);
+                memset(buf,0,num);
                 OPENSSL_free(buf);
                 }
         return(r);