Hide BN_CTX structure details.

[openssl.git] / crypto / bn / bn_ctx.c

diff --git a/crypto/bn/bn_ctx.c b/crypto/bn/bn_ctx.c
index b1a8d75..7daf19e 100644 (file)
--- a/crypto/bn/bn_ctx.c
+++ b/crypto/bn/bn_ctx.c
@@ -61,8 +61,9 @@
 
 #include <stdio.h>
 #include <assert.h>
+
 #include "cryptlib.h"
-#include <openssl/bn.h>
+#include "bn_lcl.h"
 
 
 BN_CTX *BN_CTX_new(void)
@@ -83,6 +84,7 @@ BN_CTX *BN_CTX_new(void)
 
 void BN_CTX_init(BN_CTX *ctx)
        {
+#if 0 /* explicit version */
        int i;
        ctx->tos = 0;
        ctx->flags = 0;
@@ -90,6 +92,9 @@ void BN_CTX_init(BN_CTX *ctx)
        ctx->too_many = 0;
        for (i = 0; i < BN_CTX_NUM; i++)
                BN_init(&(ctx->bn[i]));
+#else
+       memset(ctx, 0, sizeof *ctx);
+#endif
        }
 
 void BN_CTX_free(BN_CTX *ctx)
@@ -112,8 +117,14 @@ void BN_CTX_start(BN_CTX *ctx)
        ctx->depth++;
        }
 
+
 BIGNUM *BN_CTX_get(BN_CTX *ctx)
        {
+       /* Note: If BN_CTX_get is ever changed to allocate BIGNUMs dynamically,
+        * make sure that if BN_CTX_get fails once it will return NULL again
+        * until BN_CTX_end is called.  (This is so that callers have to check
+        * only the last return value.)
+        */
        if (ctx->depth > BN_CTX_NUM_POS || ctx->tos >= BN_CTX_NUM)
                {
                if (!ctx->too_many)