* 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:
* 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
* 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
* [including the GNU Public Licence.]
*/
-#include <stdio.h>
-#include "cryptlib.h"
+#ifndef BN_DEBUG
+# undef NDEBUG /* avoid conflicting definitions */
+# define NDEBUG
+#endif
+
+#include <assert.h>
+#include <limits.h>
+#include "internal/cryptlib.h"
#include "bn_lcl.h"
-char *BN_version="Big Number part of OpenSSL 0.9.1c 23-Dec-1998";
+const char BN_version[] = "Big Number" OPENSSL_VERSION_PTEXT;
-/* For a 32 bit machine
+/* This stuff appears to be completely unused, so is deprecated */
+#ifndef OPENSSL_NO_DEPRECATED
+/*-
+ * For a 32 bit machine
* 2 - 4 == 128
* 3 - 8 == 256
* 4 - 16 == 512
* 7 - 128 == 4096
* 8 - 256 == 8192
*/
-int bn_limit_bits=0;
-int bn_limit_num=8; /* (1<<bn_limit_bits) */
-int bn_limit_bits_low=0;
-int bn_limit_num_low=8; /* (1<<bn_limit_bits_low) */
-int bn_limit_bits_high=0;
-int bn_limit_num_high=8; /* (1<<bn_limit_bits_high) */
-int bn_limit_bits_mont=0;
-int bn_limit_num_mont=8; /* (1<<bn_limit_bits_mont) */
-
-void BN_set_params(mult,high,low,mont)
-int mult,high,low,mont;
- {
- if (mult >= 0)
- {
- if (mult > (sizeof(int)*8)-1)
- mult=sizeof(int)*8-1;
- bn_limit_bits=mult;
- bn_limit_num=1<<mult;
- }
- if (high >= 0)
- {
- if (high > (sizeof(int)*8)-1)
- high=sizeof(int)*8-1;
- bn_limit_bits_high=high;
- bn_limit_num_high=1<<high;
- }
- if (low >= 0)
- {
- if (low > (sizeof(int)*8)-1)
- low=sizeof(int)*8-1;
- bn_limit_bits_low=low;
- bn_limit_num_low=1<<low;
- }
- if (mont >= 0)
- {
- if (mont > (sizeof(int)*8)-1)
- mont=sizeof(int)*8-1;
- bn_limit_bits_mont=mont;
- bn_limit_num_mont=1<<mont;
- }
- }
-
-int BN_get_params(which)
-int which;
- {
- if (which == 0) return(bn_limit_bits);
- else if (which == 1) return(bn_limit_bits_high);
- else if (which == 2) return(bn_limit_bits_low);
- else if (which == 3) return(bn_limit_bits_mont);
- else return(0);
- }
-
-BIGNUM *BN_value_one()
- {
- static BN_ULONG data_one=1L;
- static BIGNUM const_one={&data_one,1,1,0};
-
- return(&const_one);
- }
-
-char *BN_options()
- {
- static int init=0;
- static char data[16];
-
- if (!init)
- {
- init++;
-#ifdef BN_LLONG
- sprintf(data,"bn(%d,%d)",(int)sizeof(BN_ULLONG)*8,
- (int)sizeof(BN_ULONG)*8);
-#else
- sprintf(data,"bn(%d,%d)",(int)sizeof(BN_ULONG)*8,
- (int)sizeof(BN_ULONG)*8);
+static int bn_limit_bits = 0;
+static int bn_limit_num = 8; /* (1<<bn_limit_bits) */
+static int bn_limit_bits_low = 0;
+static int bn_limit_num_low = 8; /* (1<<bn_limit_bits_low) */
+static int bn_limit_bits_high = 0;
+static int bn_limit_num_high = 8; /* (1<<bn_limit_bits_high) */
+static int bn_limit_bits_mont = 0;
+static int bn_limit_num_mont = 8; /* (1<<bn_limit_bits_mont) */
+
+void BN_set_params(int mult, int high, int low, int mont)
+{
+ if (mult >= 0) {
+ if (mult > (int)(sizeof(int) * 8) - 1)
+ mult = sizeof(int) * 8 - 1;
+ bn_limit_bits = mult;
+ bn_limit_num = 1 << mult;
+ }
+ if (high >= 0) {
+ if (high > (int)(sizeof(int) * 8) - 1)
+ high = sizeof(int) * 8 - 1;
+ bn_limit_bits_high = high;
+ bn_limit_num_high = 1 << high;
+ }
+ if (low >= 0) {
+ if (low > (int)(sizeof(int) * 8) - 1)
+ low = sizeof(int) * 8 - 1;
+ bn_limit_bits_low = low;
+ bn_limit_num_low = 1 << low;
+ }
+ if (mont >= 0) {
+ if (mont > (int)(sizeof(int) * 8) - 1)
+ mont = sizeof(int) * 8 - 1;
+ bn_limit_bits_mont = mont;
+ bn_limit_num_mont = 1 << mont;
+ }
+}
+
+int BN_get_params(int which)
+{
+ if (which == 0)
+ return (bn_limit_bits);
+ else if (which == 1)
+ return (bn_limit_bits_high);
+ else if (which == 2)
+ return (bn_limit_bits_low);
+ else if (which == 3)
+ return (bn_limit_bits_mont);
+ else
+ return (0);
+}
#endif
- }
- return(data);
- }
-
-int BN_num_bits_word(l)
-BN_ULONG l;
- {
- static char bits[256]={
- 0,1,2,2,3,3,3,3,4,4,4,4,4,4,4,4,
- 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
- 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
- 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
- 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
- 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
- 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
- 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
- 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
- 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
- };
+
+const BIGNUM *BN_value_one(void)
+{
+ static const BN_ULONG data_one = 1L;
+ static const BIGNUM const_one =
+ { (BN_ULONG *)&data_one, 1, 1, 0, BN_FLG_STATIC_DATA };
+
+ return (&const_one);
+}
+
+int BN_num_bits_word(BN_ULONG l)
+{
+ static const unsigned char bits[256] = {
+ 0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
+ 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+ };
#if defined(SIXTY_FOUR_BIT_LONG)
- if (l & 0xffffffff00000000L)
- {
- if (l & 0xffff000000000000L)
- {
- if (l & 0xff00000000000000L)
- {
- return(bits[(int)(l>>56)]+56);
- }
- else return(bits[(int)(l>>48)]+48);
- }
- else
- {
- if (l & 0x0000ff0000000000L)
- {
- return(bits[(int)(l>>40)]+40);
- }
- else return(bits[(int)(l>>32)]+32);
- }
- }
- else
+ if (l & 0xffffffff00000000L) {
+ if (l & 0xffff000000000000L) {
+ if (l & 0xff00000000000000L) {
+ return (bits[(int)(l >> 56)] + 56);
+ } else
+ return (bits[(int)(l >> 48)] + 48);
+ } else {
+ if (l & 0x0000ff0000000000L) {
+ return (bits[(int)(l >> 40)] + 40);
+ } else
+ return (bits[(int)(l >> 32)] + 32);
+ }
+ } else
#else
-#ifdef SIXTY_FOUR_BIT
- if (l & 0xffffffff00000000LL)
- {
- if (l & 0xffff000000000000LL)
- {
- if (l & 0xff00000000000000LL)
- {
- return(bits[(int)(l>>56)]+56);
- }
- else return(bits[(int)(l>>48)]+48);
- }
- else
- {
- if (l & 0x0000ff0000000000LL)
- {
- return(bits[(int)(l>>40)]+40);
- }
- else return(bits[(int)(l>>32)]+32);
- }
- }
- else
+# ifdef SIXTY_FOUR_BIT
+ if (l & 0xffffffff00000000LL) {
+ if (l & 0xffff000000000000LL) {
+ if (l & 0xff00000000000000LL) {
+ return (bits[(int)(l >> 56)] + 56);
+ } else
+ return (bits[(int)(l >> 48)] + 48);
+ } else {
+ if (l & 0x0000ff0000000000LL) {
+ return (bits[(int)(l >> 40)] + 40);
+ } else
+ return (bits[(int)(l >> 32)] + 32);
+ }
+ } else
+# endif
#endif
+ {
+#if defined(THIRTY_TWO_BIT) || defined(SIXTY_FOUR_BIT) || defined(SIXTY_FOUR_BIT_LONG)
+ if (l & 0xffff0000L) {
+ if (l & 0xff000000L)
+ return (bits[(int)(l >> 24L)] + 24);
+ else
+ return (bits[(int)(l >> 16L)] + 16);
+ } else
#endif
- {
+ {
#if defined(THIRTY_TWO_BIT) || defined(SIXTY_FOUR_BIT) || defined(SIXTY_FOUR_BIT_LONG)
- if (l & 0xffff0000L)
- {
- if (l & 0xff000000L)
- return(bits[(int)(l>>24L)]+24);
- else return(bits[(int)(l>>16L)]+16);
- }
- else
+ if (l & 0xff00L)
+ return (bits[(int)(l >> 8)] + 8);
+ else
#endif
- {
-#if defined(SIXTEEN_BIT) || defined(THIRTY_TWO_BIT) || defined(SIXTY_FOUR_BIT) || defined(SIXTY_FOUR_BIT_LONG)
- if (l & 0xff00L)
- return(bits[(int)(l>>8)]+8);
- else
+ return (bits[(int)(l)]);
+ }
+ }
+}
+
+int BN_num_bits(const BIGNUM *a)
+{
+ int i = a->top - 1;
+ bn_check_top(a);
+
+ if (BN_is_zero(a))
+ return 0;
+ return ((i * BN_BITS2) + BN_num_bits_word(a->d[i]));
+}
+
+static void bn_free_d(BIGNUM *a)
+{
+ if (BN_get_flags(a,BN_FLG_SECURE))
+ OPENSSL_secure_free(a->d);
+ else
+ OPENSSL_free(a->d);
+}
+
+
+void BN_clear_free(BIGNUM *a)
+{
+ int i;
+
+ if (a == NULL)
+ return;
+ bn_check_top(a);
+ if (a->d != NULL) {
+ OPENSSL_cleanse(a->d, a->dmax * sizeof(a->d[0]));
+ if (!BN_get_flags(a, BN_FLG_STATIC_DATA))
+ bn_free_d(a);
+ }
+ i = BN_get_flags(a, BN_FLG_MALLOCED);
+ OPENSSL_cleanse(a, sizeof(*a));
+ if (i)
+ OPENSSL_free(a);
+}
+
+void BN_free(BIGNUM *a)
+{
+ if (a == NULL)
+ return;
+ bn_check_top(a);
+ if (!BN_get_flags(a, BN_FLG_STATIC_DATA))
+ bn_free_d(a);
+ if (a->flags & BN_FLG_MALLOCED)
+ OPENSSL_free(a);
+ else {
+#ifndef OPENSSL_NO_DEPRECATED
+ a->flags |= BN_FLG_FREE;
#endif
- return(bits[(int)(l )] );
- }
- }
- }
-
-int BN_num_bits(a)
-BIGNUM *a;
- {
- BN_ULONG l;
- int i;
-
- bn_check_top(a);
-
- if (a->top == 0) return(0);
- l=a->d[a->top-1];
- i=(a->top-1)*BN_BITS2;
- if (l == 0)
- {
-#if !defined(NO_STDIO) && !defined(WIN16)
- fprintf(stderr,"BAD TOP VALUE\n");
+ a->d = NULL;
+ }
+}
+
+void BN_init(BIGNUM *a)
+{
+ memset(a, 0, sizeof(*a));
+ bn_check_top(a);
+}
+
+BIGNUM *BN_new(void)
+{
+ BIGNUM *ret;
+
+ if ((ret = OPENSSL_malloc(sizeof(*ret))) == NULL) {
+ BNerr(BN_F_BN_NEW, ERR_R_MALLOC_FAILURE);
+ return (NULL);
+ }
+ ret->flags = BN_FLG_MALLOCED;
+ ret->top = 0;
+ ret->neg = 0;
+ ret->dmax = 0;
+ ret->d = NULL;
+ bn_check_top(ret);
+ return (ret);
+}
+
+ BIGNUM *BN_secure_new(void)
+ {
+ BIGNUM *ret = BN_new();
+ if (ret)
+ ret->flags |= BN_FLG_SECURE;
+ return (ret);
+ }
+
+/* This is used both by bn_expand2() and bn_dup_expand() */
+/* The caller MUST check that words > b->dmax before calling this */
+static BN_ULONG *bn_expand_internal(const BIGNUM *b, int words)
+{
+ BN_ULONG *A, *a = NULL;
+ const BN_ULONG *B;
+ int i;
+
+ bn_check_top(b);
+
+ if (words > (INT_MAX / (4 * BN_BITS2))) {
+ BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_BIGNUM_TOO_LONG);
+ return NULL;
+ }
+ if (BN_get_flags(b, BN_FLG_STATIC_DATA)) {
+ BNerr(BN_F_BN_EXPAND_INTERNAL, BN_R_EXPAND_ON_STATIC_BIGNUM_DATA);
+ return (NULL);
+ }
+ if (BN_get_flags(b,BN_FLG_SECURE))
+ a = A = OPENSSL_secure_malloc(words * sizeof(*a));
+ else
+ a = A = OPENSSL_malloc(words * sizeof(*a));
+ if (A == NULL) {
+ BNerr(BN_F_BN_EXPAND_INTERNAL, ERR_R_MALLOC_FAILURE);
+ return (NULL);
+ }
+#ifdef PURIFY
+ /*
+ * Valgrind complains in BN_consttime_swap because we process the whole
+ * array even if it's not initialised yet. This doesn't matter in that
+ * function - what's important is constant time operation (we're not
+ * actually going to use the data)
+ */
+ memset(a, 0, sizeof(*a) * words);
#endif
- abort();
- }
- return(i+BN_num_bits_word(l));
- }
-
-void BN_clear_free(a)
-BIGNUM *a;
- {
- int i;
-
- if (a == NULL) return;
- if (a->d != NULL)
- {
- memset(a->d,0,a->max*sizeof(a->d[0]));
- if (!(BN_get_flags(a,BN_FLG_STATIC_DATA)))
- Free(a->d);
- }
- i=BN_get_flags(a,BN_FLG_MALLOCED);
- memset(a,0,sizeof(BIGNUM));
- if (i)
- Free(a);
- }
-
-void BN_free(a)
-BIGNUM *a;
- {
- if (a == NULL) return;
- if ((a->d != NULL) && !(BN_get_flags(a,BN_FLG_STATIC_DATA)))
- Free(a->d);
- a->flags|=BN_FLG_FREE; /* REMOVE? */
- if (a->flags & BN_FLG_MALLOCED)
- Free(a);
- }
-
-void BN_init(a)
-BIGNUM *a;
- {
- memset(a,0,sizeof(BIGNUM));
- }
-
-BIGNUM *BN_new()
- {
- BIGNUM *ret;
-
- if ((ret=(BIGNUM *)Malloc(sizeof(BIGNUM))) == NULL)
- {
- BNerr(BN_F_BN_NEW,ERR_R_MALLOC_FAILURE);
- return(NULL);
- }
- ret->flags=BN_FLG_MALLOCED;
- ret->top=0;
- ret->neg=0;
- ret->max=0;
- ret->d=NULL;
- return(ret);
- }
-
-
-BN_CTX *BN_CTX_new()
- {
- BN_CTX *ret;
-
- ret=(BN_CTX *)Malloc(sizeof(BN_CTX));
- if (ret == NULL)
- {
- BNerr(BN_F_BN_CTX_NEW,ERR_R_MALLOC_FAILURE);
- return(NULL);
- }
-
- BN_CTX_init(ret);
- ret->flags=BN_FLG_MALLOCED;
- return(ret);
- }
-
-void BN_CTX_init(ctx)
-BN_CTX *ctx;
- {
- memset(ctx,0,sizeof(BN_CTX));
- ctx->tos=0;
- ctx->flags=0;
- }
-
-void BN_CTX_free(c)
-BN_CTX *c;
- {
- int i;
-
- for (i=0; i<BN_CTX_NUM; i++)
- BN_clear_free(&(c->bn[i]));
- if (c->flags & BN_FLG_MALLOCED)
- Free(c);
- }
-
-BIGNUM *bn_expand2(b, words)
-BIGNUM *b;
-int words;
- {
- BN_ULONG *A,*B,*a;
- int i,j;
-
- bn_check_top(b);
-
- if (words > b->max)
- {
- bn_check_top(b);
- if (BN_get_flags(b,BN_FLG_STATIC_DATA))
- {
- BNerr(BN_F_BN_EXPAND2,BN_R_EXPAND_ON_STATIC_BIGNUM_DATA);
- return(NULL);
- }
- a=A=(BN_ULONG *)Malloc(sizeof(BN_ULONG)*(words+1));
- if (A == NULL)
- {
- BNerr(BN_F_BN_EXPAND2,ERR_R_MALLOC_FAILURE);
- return(NULL);
- }
-memset(A,0x5c,sizeof(BN_ULONG)*(words+1));
-#if 1
- B=b->d;
- if (B != NULL)
- {
- for (i=b->top&(~7); i>0; i-=8)
- {
- A[0]=B[0]; A[1]=B[1]; A[2]=B[2]; A[3]=B[3];
- A[4]=B[4]; A[5]=B[5]; A[6]=B[6]; A[7]=B[7];
- A+=8;
- B+=8;
- }
- switch (b->top&7)
- {
- case 7:
- A[6]=B[6];
- case 6:
- A[5]=B[5];
- case 5:
- A[4]=B[4];
- case 4:
- A[3]=B[3];
- case 3:
- A[2]=B[2];
- case 2:
- A[1]=B[1];
- case 1:
- A[0]=B[0];
- case 0:
- /* I need the 'case 0' entry for utrix cc.
- * If the optimiser is turned on, it does the
- * switch table by doing
- * a=top&7
- * a--;
- * goto jump_table[a];
- * If top is 0, this makes us jump to 0xffffffc
- * which is rather bad :-(.
- * eric 23-Apr-1998
- */
- ;
- }
- B= &(b->d[b->top]);
- j=b->max-8;
- for (i=b->top; i<j; i+=8)
- {
- B[0]=0; B[1]=0; B[2]=0; B[3]=0;
- B[4]=0; B[5]=0; B[6]=0; B[7]=0;
- B+=8;
- }
- for (j+=8; i<j; i++)
- {
- B[0]=0;
- B++;
- }
-#else
- memcpy(a->d,b->d,sizeof(b->d[0])*b->top);
-#endif
-
-/* memset(&(p[b->max]),0,((words+1)-b->max)*sizeof(BN_ULONG)); */
-/* { int i; for (i=b->max; i<words+1; i++) p[i]=i;} */
- Free(b->d);
- }
-
- b->d=a;
- b->max=words;
- }
- return(b);
- }
-
-BIGNUM *BN_dup(a)
-BIGNUM *a;
- {
- BIGNUM *r;
-
- bn_check_top(a);
-
- r=BN_new();
- if (r == NULL) return(NULL);
- return((BIGNUM *)BN_copy(r,a));
- }
-
-BIGNUM *BN_copy(a, b)
-BIGNUM *a;
-BIGNUM *b;
- {
- int i;
- BN_ULONG *A,*B;
-
- bn_check_top(b);
-
- if (a == b) return(a);
- if (bn_wexpand(a,b->top) == NULL) return(NULL);
#if 1
- A=a->d;
- B=b->d;
- for (i=b->top&(~7); i>0; i-=8)
- {
- A[0]=B[0];
- A[1]=B[1];
- A[2]=B[2];
- A[3]=B[3];
- A[4]=B[4];
- A[5]=B[5];
- A[6]=B[6];
- A[7]=B[7];
- A+=8;
- B+=8;
- }
- switch (b->top&7)
- {
- case 7:
- A[6]=B[6];
- case 6:
- A[5]=B[5];
- case 5:
- A[4]=B[4];
- case 4:
- A[3]=B[3];
- case 3:
- A[2]=B[2];
- case 2:
- A[1]=B[1];
- case 1:
- A[0]=B[0];
+ B = b->d;
+ /* Check if the previous number needs to be copied */
+ if (B != NULL) {
+ for (i = b->top >> 2; i > 0; i--, A += 4, B += 4) {
+ /*
+ * The fact that the loop is unrolled
+ * 4-wise is a tribute to Intel. It's
+ * the one that doesn't have enough
+ * registers to accomodate more data.
+ * I'd unroll it 8-wise otherwise:-)
+ *
+ * <appro@fy.chalmers.se>
+ */
+ BN_ULONG a0, a1, a2, a3;
+ a0 = B[0];
+ a1 = B[1];
+ a2 = B[2];
+ a3 = B[3];
+ A[0] = a0;
+ A[1] = a1;
+ A[2] = a2;
+ A[3] = a3;
+ }
+ /*
+ * workaround for ultrix cc: without 'case 0', the optimizer does
+ * the switch table by doing a=top&3; a--; goto jump_table[a];
+ * which fails for top== 0
+ */
+ switch (b->top & 3) {
+ case 3:
+ A[2] = B[2];
+ case 2:
+ A[1] = B[1];
+ case 1:
+ A[0] = B[0];
case 0:
- /* I need the 'case 0' entry for utrix cc.
- * If the optimiser is turned on, it does the
- * switch table by doing
- * a=top&7
- * a--;
- * goto jump_table[a];
- * If top is 0, this makes us jump to 0xffffffc which is
- * rather bad :-(.
- * eric 23-Apr-1998
- */
- ;
- }
+ ;
+ }
+ }
#else
- memcpy(a->d,b->d,sizeof(b->d[0])*b->top);
+ memset(A, 0, sizeof(*A) * words);
+ memcpy(A, b->d, sizeof(b->d[0]) * b->top);
#endif
-/* memset(&(a->d[b->top]),0,sizeof(a->d[0])*(a->max-b->top));*/
- a->top=b->top;
- if ((a->top == 0) && (a->d != NULL))
- a->d[0]=0;
- a->neg=b->neg;
- return(a);
- }
-
-void BN_clear(a)
-BIGNUM *a;
- {
- if (a->d != NULL)
- memset(a->d,0,a->max*sizeof(a->d[0]));
- a->top=0;
- a->neg=0;
- }
-
-BN_ULONG BN_get_word(a)
-BIGNUM *a;
- {
- int i,n;
- BN_ULONG ret=0;
-
- n=BN_num_bytes(a);
- if (n > sizeof(BN_ULONG))
- return(BN_MASK2);
- for (i=a->top-1; i>=0; i--)
- {
-#ifndef SIXTY_FOUR_BIT /* the data item > unsigned long */
- ret<<=BN_BITS4; /* stops the compiler complaining */
- ret<<=BN_BITS4;
-#endif
- ret|=a->d[i];
- }
- return(ret);
- }
-
-int BN_set_word(a,w)
-BIGNUM *a;
-BN_ULONG w;
- {
- int i,n;
- if (bn_expand(a,sizeof(BN_ULONG)*8) == NULL) return(0);
-
- n=sizeof(BN_ULONG)/BN_BYTES;
- a->neg=0;
- a->top=0;
- a->d[0]=(BN_ULONG)w&BN_MASK2;
- if (a->d[0] != 0) a->top=1;
- for (i=1; i<n; i++)
- {
- /* the following is done instead of
- * w>>=BN_BITS2 so compilers don't complain
- * on builds where sizeof(long) == BN_TYPES */
-#ifndef SIXTY_FOUR_BIT /* the data item > unsigned long */
- w>>=BN_BITS4;
- w>>=BN_BITS4;
+ return (a);
+}
+
+/*
+ * This is an internal function that should not be used in applications. It
+ * ensures that 'b' has enough room for a 'words' word number and initialises
+ * any unused part of b->d with leading zeros. It is mostly used by the
+ * various BIGNUM routines. If there is an error, NULL is returned. If not,
+ * 'b' is returned.
+ */
+
+BIGNUM *bn_expand2(BIGNUM *b, int words)
+{
+ bn_check_top(b);
+
+ if (words > b->dmax) {
+ BN_ULONG *a = bn_expand_internal(b, words);
+ if (!a)
+ return NULL;
+ if (b->d) {
+ OPENSSL_cleanse(b->d, b->dmax * sizeof(b->d[0]));
+ bn_free_d(b);
+ }
+ b->d = a;
+ b->dmax = words;
+ }
+
+ bn_check_top(b);
+ return b;
+}
+
+BIGNUM *BN_dup(const BIGNUM *a)
+{
+ BIGNUM *t;
+
+ if (a == NULL)
+ return NULL;
+ bn_check_top(a);
+
+ t = BN_get_flags(a, BN_FLG_SECURE) ? BN_secure_new() : BN_new();
+ if (t == NULL)
+ return NULL;
+ if (!BN_copy(t, a)) {
+ BN_free(t);
+ return NULL;
+ }
+ bn_check_top(t);
+ return t;
+}
+
+BIGNUM *BN_copy(BIGNUM *a, const BIGNUM *b)
+{
+ int i;
+ BN_ULONG *A;
+ const BN_ULONG *B;
+
+ bn_check_top(b);
+
+ if (a == b)
+ return (a);
+ if (bn_wexpand(a, b->top) == NULL)
+ return (NULL);
+
+#if 1
+ A = a->d;
+ B = b->d;
+ for (i = b->top >> 2; i > 0; i--, A += 4, B += 4) {
+ BN_ULONG a0, a1, a2, a3;
+ a0 = B[0];
+ a1 = B[1];
+ a2 = B[2];
+ a3 = B[3];
+ A[0] = a0;
+ A[1] = a1;
+ A[2] = a2;
+ A[3] = a3;
+ }
+ /* ultrix cc workaround, see comments in bn_expand_internal */
+ switch (b->top & 3) {
+ case 3:
+ A[2] = B[2];
+ case 2:
+ A[1] = B[1];
+ case 1:
+ A[0] = B[0];
+ case 0:;
+ }
+#else
+ memcpy(a->d, b->d, sizeof(b->d[0]) * b->top);
#endif
- a->d[i]=(BN_ULONG)w&BN_MASK2;
- if (a->d[i] != 0) a->top=i+1;
- }
- return(1);
- }
-/* ignore negative */
-BIGNUM *BN_bin2bn(s, len, ret)
-unsigned char *s;
-int len;
-BIGNUM *ret;
- {
- unsigned int i,m;
- unsigned int n;
- BN_ULONG l;
-
- if (ret == NULL) ret=BN_new();
- if (ret == NULL) return(NULL);
- l=0;
- n=len;
- if (n == 0)
- {
- ret->top=0;
- return(ret);
- }
- if (bn_expand(ret,(int)(n+2)*8) == NULL)
- return(NULL);
- i=((n-1)/BN_BYTES)+1;
- m=((n-1)%(BN_BYTES));
- ret->top=i;
- while (n-- > 0)
- {
- l=(l<<8L)| *(s++);
- if (m-- == 0)
- {
- ret->d[--i]=l;
- l=0;
- m=BN_BYTES-1;
- }
- }
- /* need to call this due to clear byte at top if avoiding
- * having the top bit set (-ve number) */
- bn_fix_top(ret);
- return(ret);
- }
+ a->top = b->top;
+ a->neg = b->neg;
+ bn_check_top(a);
+ return (a);
+}
+
+void BN_swap(BIGNUM *a, BIGNUM *b)
+{
+ int flags_old_a, flags_old_b;
+ BN_ULONG *tmp_d;
+ int tmp_top, tmp_dmax, tmp_neg;
+
+ bn_check_top(a);
+ bn_check_top(b);
+
+ flags_old_a = a->flags;
+ flags_old_b = b->flags;
+
+ tmp_d = a->d;
+ tmp_top = a->top;
+ tmp_dmax = a->dmax;
+ tmp_neg = a->neg;
+
+ a->d = b->d;
+ a->top = b->top;
+ a->dmax = b->dmax;
+ a->neg = b->neg;
+
+ b->d = tmp_d;
+ b->top = tmp_top;
+ b->dmax = tmp_dmax;
+ b->neg = tmp_neg;
+
+ a->flags =
+ (flags_old_a & BN_FLG_MALLOCED) | (flags_old_b & BN_FLG_STATIC_DATA);
+ b->flags =
+ (flags_old_b & BN_FLG_MALLOCED) | (flags_old_a & BN_FLG_STATIC_DATA);
+ bn_check_top(a);
+ bn_check_top(b);
+}
+
+void BN_clear(BIGNUM *a)
+{
+ bn_check_top(a);
+ if (a->d != NULL)
+ memset(a->d, 0, sizeof(*a->d) * a->dmax);
+ a->top = 0;
+ a->neg = 0;
+}
+
+BN_ULONG BN_get_word(const BIGNUM *a)
+{
+ if (a->top > 1)
+ return BN_MASK2;
+ else if (a->top == 1)
+ return a->d[0];
+ /* a->top == 0 */
+ return 0;
+}
+
+int BN_set_word(BIGNUM *a, BN_ULONG w)
+{
+ bn_check_top(a);
+ if (bn_expand(a, (int)sizeof(BN_ULONG) * 8) == NULL)
+ return (0);
+ a->neg = 0;
+ a->d[0] = w;
+ a->top = (w ? 1 : 0);
+ bn_check_top(a);
+ return (1);
+}
+
+BIGNUM *BN_bin2bn(const unsigned char *s, int len, BIGNUM *ret)
+{
+ unsigned int i, m;
+ unsigned int n;
+ BN_ULONG l;
+ BIGNUM *bn = NULL;
+
+ if (ret == NULL)
+ ret = bn = BN_new();
+ if (ret == NULL)
+ return (NULL);
+ bn_check_top(ret);
+ l = 0;
+ n = len;
+ if (n == 0) {
+ ret->top = 0;
+ return (ret);
+ }
+ i = ((n - 1) / BN_BYTES) + 1;
+ m = ((n - 1) % (BN_BYTES));
+ if (bn_wexpand(ret, (int)i) == NULL) {
+ BN_free(bn);
+ return NULL;
+ }
+ ret->top = i;
+ ret->neg = 0;
+ while (n--) {
+ l = (l << 8L) | *(s++);
+ if (m-- == 0) {
+ ret->d[--i] = l;
+ l = 0;
+ m = BN_BYTES - 1;
+ }
+ }
+ /*
+ * need to call this due to clear byte at top if avoiding having the top
+ * bit set (-ve number)
+ */
+ bn_correct_top(ret);
+ return (ret);
+}
/* ignore negative */
-int BN_bn2bin(a, to)
-BIGNUM *a;
-unsigned char *to;
- {
- int n,i;
- BN_ULONG l;
-
- n=i=BN_num_bytes(a);
- while (i-- > 0)
- {
- l=a->d[i/BN_BYTES];
- *(to++)=(unsigned char)(l>>(8*(i%BN_BYTES)))&0xff;
- }
- return(n);
- }
-
-int BN_ucmp(a, b)
-BIGNUM *a;
-BIGNUM *b;
- {
- int i;
- BN_ULONG t1,t2,*ap,*bp;
-
- bn_check_top(a);
- bn_check_top(b);
-
- i=a->top-b->top;
- if (i != 0) return(i);
- ap=a->d;
- bp=b->d;
- for (i=a->top-1; i>=0; i--)
- {
- t1= ap[i];
- t2= bp[i];
- if (t1 != t2)
- return(t1 > t2?1:-1);
- }
- return(0);
- }
-
-int BN_cmp(a, b)
-BIGNUM *a;
-BIGNUM *b;
- {
- int i;
- int gt,lt;
- BN_ULONG t1,t2;
-
- if ((a == NULL) || (b == NULL))
- {
- if (a != NULL)
- return(-1);
- else if (b != NULL)
- return(1);
- else
- return(0);
- }
-
- bn_check_top(a);
- bn_check_top(b);
-
- if (a->neg != b->neg)
- {
- if (a->neg)
- return(-1);
- else return(1);
- }
- if (a->neg == 0)
- { gt=1; lt= -1; }
- else { gt= -1; lt=1; }
-
- if (a->top > b->top) return(gt);
- if (a->top < b->top) return(lt);
- for (i=a->top-1; i>=0; i--)
- {
- t1=a->d[i];
- t2=b->d[i];
- if (t1 > t2) return(gt);
- if (t1 < t2) return(lt);
- }
- return(0);
- }
-
-int BN_set_bit(a, n)
-BIGNUM *a;
-int n;
- {
- int i,j,k;
-
- i=n/BN_BITS2;
- j=n%BN_BITS2;
- if (a->top <= i)
- {
- if (bn_wexpand(a,i+1) == NULL) return(0);
- for(k=a->top; k<i+1; k++)
- a->d[k]=0;
- a->top=i+1;
- }
-
- a->d[i]|=(1L<<j);
- return(1);
- }
-
-int BN_clear_bit(a, n)
-BIGNUM *a;
-int n;
- {
- int i,j;
-
- i=n/BN_BITS2;
- j=n%BN_BITS2;
- if (a->top <= i) return(0);
-
- a->d[i]&=(~(1L<<j));
- bn_fix_top(a);
- return(1);
- }
-
-int BN_is_bit_set(a, n)
-BIGNUM *a;
-int n;
- {
- int i,j;
-
- if (n < 0) return(0);
- i=n/BN_BITS2;
- j=n%BN_BITS2;
- if (a->top <= i) return(0);
- return((a->d[i]&(((BN_ULONG)1)<<j))?1:0);
- }
-
-int BN_mask_bits(a,n)
-BIGNUM *a;
-int n;
- {
- int b,w;
-
- w=n/BN_BITS2;
- b=n%BN_BITS2;
- if (w >= a->top) return(0);
- if (b == 0)
- a->top=w;
- else
- {
- a->top=w+1;
- a->d[w]&= ~(BN_MASK2<<b);
- }
- bn_fix_top(a);
- return(1);
- }
-
-int bn_cmp_words(a,b,n)
-BN_ULONG *a,*b;
-int n;
- {
- int i;
- BN_ULONG aa,bb;
-
- aa=a[n-1];
- bb=b[n-1];
- if (aa != bb) return((aa > bb)?1:-1);
- for (i=n-2; i>=0; i--)
- {
- aa=a[i];
- bb=b[i];
- if (aa != bb) return((aa > bb)?1:-1);
- }
- return(0);
- }
+int BN_bn2bin(const BIGNUM *a, unsigned char *to)
+{
+ int n, i;
+ BN_ULONG l;
+
+ bn_check_top(a);
+ n = i = BN_num_bytes(a);
+ while (i--) {
+ l = a->d[i / BN_BYTES];
+ *(to++) = (unsigned char)(l >> (8 * (i % BN_BYTES))) & 0xff;
+ }
+ return (n);
+}
+
+int BN_ucmp(const BIGNUM *a, const BIGNUM *b)
+{
+ int i;
+ BN_ULONG t1, t2, *ap, *bp;
+
+ bn_check_top(a);
+ bn_check_top(b);
+
+ i = a->top - b->top;
+ if (i != 0)
+ return (i);
+ ap = a->d;
+ bp = b->d;
+ for (i = a->top - 1; i >= 0; i--) {
+ t1 = ap[i];
+ t2 = bp[i];
+ if (t1 != t2)
+ return ((t1 > t2) ? 1 : -1);
+ }
+ return (0);
+}
+
+int BN_cmp(const BIGNUM *a, const BIGNUM *b)
+{
+ int i;
+ int gt, lt;
+ BN_ULONG t1, t2;
+
+ if ((a == NULL) || (b == NULL)) {
+ if (a != NULL)
+ return (-1);
+ else if (b != NULL)
+ return (1);
+ else
+ return (0);
+ }
+
+ bn_check_top(a);
+ bn_check_top(b);
+
+ if (a->neg != b->neg) {
+ if (a->neg)
+ return (-1);
+ else
+ return (1);
+ }
+ if (a->neg == 0) {
+ gt = 1;
+ lt = -1;
+ } else {
+ gt = -1;
+ lt = 1;
+ }
+
+ if (a->top > b->top)
+ return (gt);
+ if (a->top < b->top)
+ return (lt);
+ for (i = a->top - 1; i >= 0; i--) {
+ t1 = a->d[i];
+ t2 = b->d[i];
+ if (t1 > t2)
+ return (gt);
+ if (t1 < t2)
+ return (lt);
+ }
+ return (0);
+}
+
+int BN_set_bit(BIGNUM *a, int n)
+{
+ int i, j, k;
+
+ if (n < 0)
+ return 0;
+
+ i = n / BN_BITS2;
+ j = n % BN_BITS2;
+ if (a->top <= i) {
+ if (bn_wexpand(a, i + 1) == NULL)
+ return (0);
+ for (k = a->top; k < i + 1; k++)
+ a->d[k] = 0;
+ a->top = i + 1;
+ }
+
+ a->d[i] |= (((BN_ULONG)1) << j);
+ bn_check_top(a);
+ return (1);
+}
+
+int BN_clear_bit(BIGNUM *a, int n)
+{
+ int i, j;
+
+ bn_check_top(a);
+ if (n < 0)
+ return 0;
+
+ i = n / BN_BITS2;
+ j = n % BN_BITS2;
+ if (a->top <= i)
+ return (0);
+
+ a->d[i] &= (~(((BN_ULONG)1) << j));
+ bn_correct_top(a);
+ return (1);
+}
+
+int BN_is_bit_set(const BIGNUM *a, int n)
+{
+ int i, j;
+
+ bn_check_top(a);
+ if (n < 0)
+ return 0;
+ i = n / BN_BITS2;
+ j = n % BN_BITS2;
+ if (a->top <= i)
+ return 0;
+ return (int)(((a->d[i]) >> j) & ((BN_ULONG)1));
+}
+
+int BN_mask_bits(BIGNUM *a, int n)
+{
+ int b, w;
+
+ bn_check_top(a);
+ if (n < 0)
+ return 0;
+
+ w = n / BN_BITS2;
+ b = n % BN_BITS2;
+ if (w >= a->top)
+ return 0;
+ if (b == 0)
+ a->top = w;
+ else {
+ a->top = w + 1;
+ a->d[w] &= ~(BN_MASK2 << b);
+ }
+ bn_correct_top(a);
+ return (1);
+}
+
+void BN_set_negative(BIGNUM *a, int b)
+{
+ if (b && !BN_is_zero(a))
+ a->neg = 1;
+ else
+ a->neg = 0;
+}
+
+int bn_cmp_words(const BN_ULONG *a, const BN_ULONG *b, int n)
+{
+ int i;
+ BN_ULONG aa, bb;
+
+ aa = a[n - 1];
+ bb = b[n - 1];
+ if (aa != bb)
+ return ((aa > bb) ? 1 : -1);
+ for (i = n - 2; i >= 0; i--) {
+ aa = a[i];
+ bb = b[i];
+ if (aa != bb)
+ return ((aa > bb) ? 1 : -1);
+ }
+ return (0);
+}
+
+/*
+ * Here follows a specialised variants of bn_cmp_words(). It has the
+ * property of performing the operation on arrays of different sizes. The
+ * sizes of those arrays is expressed through cl, which is the common length
+ * ( basicall, min(len(a),len(b)) ), and dl, which is the delta between the
+ * two lengths, calculated as len(a)-len(b). All lengths are the number of
+ * BN_ULONGs...
+ */
+int bn_cmp_part_words(const BN_ULONG *a, const BN_ULONG *b, int cl, int dl)
+{
+ int n, i;
+ n = cl - 1;
+
+ if (dl < 0) {
+ for (i = dl; i < 0; i++) {
+ if (b[n - i] != 0)
+ return -1; /* a < b */
+ }
+ }
+ if (dl > 0) {
+ for (i = dl; i > 0; i--) {
+ if (a[n + i] != 0)
+ return 1; /* a > b */
+ }
+ }
+ return bn_cmp_words(a, b, cl);
+}
+
+/*
+ * Constant-time conditional swap of a and b.
+ * a and b are swapped if condition is not 0. The code assumes that at most one bit of condition is set.
+ * nwords is the number of words to swap. The code assumes that at least nwords are allocated in both a and b,
+ * and that no more than nwords are used by either a or b.
+ * a and b cannot be the same number
+ */
+void BN_consttime_swap(BN_ULONG condition, BIGNUM *a, BIGNUM *b, int nwords)
+{
+ BN_ULONG t;
+ int i;
+
+ bn_wcheck_size(a, nwords);
+ bn_wcheck_size(b, nwords);
+
+ assert(a != b);
+ assert((condition & (condition - 1)) == 0);
+ assert(sizeof(BN_ULONG) >= sizeof(int));
+
+ condition = ((condition - 1) >> (BN_BITS2 - 1)) - 1;
+
+ t = (a->top ^ b->top) & condition;
+ a->top ^= t;
+ b->top ^= t;
+
+#define BN_CONSTTIME_SWAP(ind) \
+ do { \
+ t = (a->d[ind] ^ b->d[ind]) & condition; \
+ a->d[ind] ^= t; \
+ b->d[ind] ^= t; \
+ } while (0)
+
+ switch (nwords) {
+ default:
+ for (i = 10; i < nwords; i++)
+ BN_CONSTTIME_SWAP(i);
+ /* Fallthrough */
+ case 10:
+ BN_CONSTTIME_SWAP(9); /* Fallthrough */
+ case 9:
+ BN_CONSTTIME_SWAP(8); /* Fallthrough */
+ case 8:
+ BN_CONSTTIME_SWAP(7); /* Fallthrough */
+ case 7:
+ BN_CONSTTIME_SWAP(6); /* Fallthrough */
+ case 6:
+ BN_CONSTTIME_SWAP(5); /* Fallthrough */
+ case 5:
+ BN_CONSTTIME_SWAP(4); /* Fallthrough */
+ case 4:
+ BN_CONSTTIME_SWAP(3); /* Fallthrough */
+ case 3:
+ BN_CONSTTIME_SWAP(2); /* Fallthrough */
+ case 2:
+ BN_CONSTTIME_SWAP(1); /* Fallthrough */
+ case 1:
+ BN_CONSTTIME_SWAP(0);
+ }
+#undef BN_CONSTTIME_SWAP
+}
+
+/* Bits of security, see SP800-57 */
+
+int BN_security_bits(int L, int N)
+{
+ int secbits, bits;
+ if (L >= 15360)
+ secbits = 256;
+ else if (L >= 7690)
+ secbits = 192;
+ else if (L >= 3072)
+ secbits = 128;
+ else if (L >= 2048)
+ secbits = 112;
+ else if (L >= 1024)
+ secbits = 80;
+ else
+ return 0;
+ if (N == -1)
+ return secbits;
+ bits = N / 2;
+ if (bits < 80)
+ return 0;
+ return bits >= secbits ? secbits : bits;
+}
+
+void BN_zero_ex(BIGNUM *a)
+{
+ a->top = 0;
+ a->neg = 0;
+}
+
+int BN_abs_is_word(const BIGNUM *a, const BN_ULONG w)
+{
+ return ((a->top == 1) && (a->d[0] == w)) || ((w == 0) && (a->top == 0));
+}
+
+int BN_is_zero(const BIGNUM *a)
+{
+ return a->top == 0;
+}
+
+int BN_is_one(const BIGNUM *a)
+{
+ return BN_abs_is_word(a, 1) && !a->neg;
+}
+
+int BN_is_word(const BIGNUM *a, const BN_ULONG w)
+{
+ return BN_abs_is_word(a, w) && (!w || !a->neg);
+}
+
+int BN_is_odd(const BIGNUM *a)
+{
+ return (a->top > 0) && (a->d[0] & 1);
+}
+
+int BN_is_negative(const BIGNUM *a)
+{
+ return (a->neg != 0);
+}
+
+int BN_to_montgomery(BIGNUM *r, const BIGNUM *a, BN_MONT_CTX *mont,
+ BN_CTX *ctx)
+{
+ return BN_mod_mul_montgomery(r, a, &(mont->RR), mont, ctx);
+}
+
+void BN_with_flags(BIGNUM *dest, const BIGNUM *b, int n)
+{
+ dest->d = b->d;
+ dest->top = b->top;
+ dest->dmax = b->dmax;
+ dest->neg = b->neg;
+ dest->flags = ((dest->flags & BN_FLG_MALLOCED)
+ | (b->flags & ~BN_FLG_MALLOCED)
+ | BN_FLG_STATIC_DATA | n);
+}
+
+BN_GENCB *BN_GENCB_new(void)
+{
+ BN_GENCB *ret;
+
+ if ((ret = OPENSSL_malloc(sizeof(*ret))) == NULL) {
+ BNerr(BN_F_BN_GENCB_NEW, ERR_R_MALLOC_FAILURE);
+ return (NULL);
+ }
+
+ return ret;
+}
+
+void BN_GENCB_free(BN_GENCB *cb)
+{
+ if (cb == NULL)
+ return;
+ OPENSSL_free(cb);
+}
+
+void BN_set_flags(BIGNUM *b, int n)
+{
+ b->flags |= n;
+}
+
+int BN_get_flags(const BIGNUM *b, int n)
+{
+ return b->flags & n;
+}
+
+/* Populate a BN_GENCB structure with an "old"-style callback */
+void BN_GENCB_set_old(BN_GENCB *gencb, void (*callback) (int, int, void *),
+ void *cb_arg)
+{
+ BN_GENCB *tmp_gencb = gencb;
+ tmp_gencb->ver = 1;
+ tmp_gencb->arg = cb_arg;
+ tmp_gencb->cb.cb_1 = callback;
+}
+
+/* Populate a BN_GENCB structure with a "new"-style callback */
+void BN_GENCB_set(BN_GENCB *gencb, int (*callback) (int, int, BN_GENCB *),
+ void *cb_arg)
+{
+ BN_GENCB *tmp_gencb = gencb;
+ tmp_gencb->ver = 2;
+ tmp_gencb->arg = cb_arg;
+ tmp_gencb->cb.cb_2 = callback;
+}
+
+void *BN_GENCB_get_arg(BN_GENCB *cb)
+{
+ return cb->arg;
+}
+
+BIGNUM *bn_wexpand(BIGNUM *a, int words)
+{
+ return (words <= a->dmax) ? a : bn_expand2(a, words);
+}
+
+void bn_correct_top(BIGNUM *a)
+{
+ BN_ULONG *ftl;
+ int tmp_top = a->top;
+
+ if (tmp_top > 0) {
+ for (ftl = &(a->d[tmp_top - 1]); tmp_top > 0; tmp_top--)
+ if (*(ftl--))
+ break;
+ a->top = tmp_top;
+ }
+ bn_pollute(a);
+}
projects / openssl.git / blobdiff