+/* Must 'Free' the returned data */
+char *BN_bn2dec(const BIGNUM *a)
+ {
+ int i=0,num;
+ char *buf=NULL;
+ char *p;
+ BIGNUM *t=NULL;
+ BN_ULONG *bn_data=NULL,*lp;
+
+ i=BN_num_bits(a)*3;
+ num=(i/10+i/1000+3)+1;
+ bn_data=(BN_ULONG *)Malloc((num/BN_DEC_NUM+1)*sizeof(BN_ULONG));
+ buf=(char *)Malloc(num+3);
+ if ((buf == NULL) || (bn_data == NULL))
+ {
+ BNerr(BN_F_BN_BN2DEC,ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ if ((t=BN_dup(a)) == NULL) goto err;
+
+ p=buf;
+ lp=bn_data;
+ if (t->neg) *(p++)='-';
+ if (t->top == 0)
+ {
+ *(p++)='0';
+ *(p++)='\0';
+ }
+ else
+ {
+ i=0;
+ while (!BN_is_zero(t))
+ {
+ *lp=BN_div_word(t,BN_DEC_CONV);
+ lp++;
+ }
+ lp--;
+ /* We now have a series of blocks, BN_DEC_NUM chars
+ * in length, where the last one needs trucation.
+ * The blocks need to be reversed in order. */
+ sprintf(p,BN_DEC_FMT1,*lp);
+ while (*p) p++;
+ while (lp != bn_data)
+ {
+ lp--;
+ sprintf(p,BN_DEC_FMT2,*lp);
+ while (*p) p++;
+ }
+ }
+err:
+ if (bn_data != NULL) Free(bn_data);
+ if (t != NULL) BN_free(t);
+ return(buf);
+ }
+
+int BN_hex2bn(BIGNUM **bn, const char *a)