/* crypto/bn/bn_print.c */
-/* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
+/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
#include <stdio.h>
#include <ctype.h>
#include "cryptlib.h"
-#include "buffer.h"
+#include <openssl/buffer.h>
#include "bn_lcl.h"
-static char *Hex="0123456789ABCDEF";
+static const char *Hex="0123456789ABCDEF";
-/* Must 'Free' the returned data */
-char *BN_bn2ascii(a)
-BIGNUM *a;
+/* Must 'OPENSSL_free' the returned data */
+char *BN_bn2hex(const BIGNUM *a)
{
int i,j,v,z=0;
char *buf;
char *p;
- buf=(char *)Malloc(a->top*BN_BYTES*2+2);
+ buf=(char *)OPENSSL_malloc(a->top*BN_BYTES*2+2);
if (buf == NULL)
{
- BNerr(BN_F_BN_BN2ASCII,ERR_R_MALLOC_FAILURE);
+ BNerr(BN_F_BN_BN2HEX,ERR_R_MALLOC_FAILURE);
goto err;
}
p=buf;
if (a->neg) *(p++)='-';
- if (a->top == 0) *(p++)='0';
+ if (BN_is_zero(a)) *(p++)='0';
for (i=a->top-1; i >=0; i--)
{
for (j=BN_BITS2-8; j >= 0; j-=8)
return(buf);
}
-int BN_ascii2bn(bn,a)
-BIGNUM **bn;
-char *a;
+/* Must 'OPENSSL_free' the returned data */
+char *BN_bn2dec(const BIGNUM *a)
+ {
+ int i=0,num, ok = 0;
+ char *buf=NULL;
+ char *p;
+ BIGNUM *t=NULL;
+ BN_ULONG *bn_data=NULL,*lp;
+
+ /* get an upper bound for the length of the decimal integer
+ * num <= (BN_num_bits(a) + 1) * log(2)
+ * <= 3 * BN_num_bits(a) * 0.1001 + log(2) + 1 (rounding error)
+ * <= BN_num_bits(a)/10 + BN_num_bits/1000 + 1 + 1
+ */
+ i=BN_num_bits(a)*3;
+ num=(i/10+i/1000+1)+1;
+ bn_data=(BN_ULONG *)OPENSSL_malloc((num/BN_DEC_NUM+1)*sizeof(BN_ULONG));
+ buf=(char *)OPENSSL_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;
+
+#define BUF_REMAIN (num+3 - (size_t)(p - buf))
+ p=buf;
+ lp=bn_data;
+ if (BN_is_zero(t))
+ {
+ *(p++)='0';
+ *(p++)='\0';
+ }
+ else
+ {
+ if (BN_is_negative(t))
+ *p++ = '-';
+
+ 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 truncation.
+ * The blocks need to be reversed in order. */
+ BIO_snprintf(p,BUF_REMAIN,BN_DEC_FMT1,*lp);
+ while (*p) p++;
+ while (lp != bn_data)
+ {
+ lp--;
+ BIO_snprintf(p,BUF_REMAIN,BN_DEC_FMT2,*lp);
+ while (*p) p++;
+ }
+ }
+ ok = 1;
+err:
+ if (bn_data != NULL) OPENSSL_free(bn_data);
+ if (t != NULL) BN_free(t);
+ if (!ok && buf)
+ {
+ OPENSSL_free(buf);
+ buf = NULL;
+ }
+
+ return(buf);
+ }
+
+int BN_hex2bn(BIGNUM **bn, const char *a)
{
BIGNUM *ret=NULL;
BN_ULONG l=0;
if (*a == '-') { neg=1; a++; }
- for (i=0; isxdigit(a[i]); i++)
+ for (i=0; isxdigit((unsigned char) a[i]); i++)
;
num=i+neg;
if (bn == NULL) return(num);
- /* a is the start of the hex digets, and it is 'i' long */
+ /* a is the start of the hex digits, and it is 'i' long */
if (*bn == NULL)
{
if ((ret=BN_new()) == NULL) return(0);
/* i is the number of hex digests; */
if (bn_expand(ret,i*4) == NULL) goto err;
- j=i; /* least significate 'hex' */
+ j=i; /* least significant 'hex' */
m=0;
h=0;
while (j > 0)
j-=(BN_BYTES*2);
}
ret->top=h;
- bn_fix_top(ret);
+ bn_correct_top(ret);
ret->neg=neg;
*bn=ret;
+ bn_check_top(ret);
return(num);
err:
if (*bn == NULL) BN_free(ret);
return(0);
}
-#ifndef NO_BIO
+int BN_dec2bn(BIGNUM **bn, const char *a)
+ {
+ BIGNUM *ret=NULL;
+ BN_ULONG l=0;
+ int neg=0,i,j;
+ int num;
+
+ if ((a == NULL) || (*a == '\0')) return(0);
+ if (*a == '-') { neg=1; a++; }
-#ifndef WIN16
-int BN_print_fp(fp, a)
-FILE *fp;
-BIGNUM *a;
+ for (i=0; isdigit((unsigned char) a[i]); i++)
+ ;
+
+ num=i+neg;
+ if (bn == NULL) return(num);
+
+ /* a is the start of the digits, and it is 'i' long.
+ * We chop it into BN_DEC_NUM digits at a time */
+ if (*bn == NULL)
+ {
+ if ((ret=BN_new()) == NULL) return(0);
+ }
+ else
+ {
+ ret= *bn;
+ BN_zero(ret);
+ }
+
+ /* i is the number of digests, a bit of an over expand; */
+ if (bn_expand(ret,i*4) == NULL) goto err;
+
+ j=BN_DEC_NUM-(i%BN_DEC_NUM);
+ if (j == BN_DEC_NUM) j=0;
+ l=0;
+ while (*a)
+ {
+ l*=10;
+ l+= *a-'0';
+ a++;
+ if (++j == BN_DEC_NUM)
+ {
+ BN_mul_word(ret,BN_DEC_CONV);
+ BN_add_word(ret,l);
+ l=0;
+ j=0;
+ }
+ }
+ ret->neg=neg;
+
+ bn_correct_top(ret);
+ *bn=ret;
+ bn_check_top(ret);
+ return(num);
+err:
+ if (*bn == NULL) BN_free(ret);
+ return(0);
+ }
+
+int BN_asc2bn(BIGNUM **bn, const char *a)
+ {
+ const char *p = a;
+ if (*p == '-')
+ p++;
+
+ if (p[0] == '0' && (p[1] == 'X' || p[1] == 'x'))
+ {
+ if (!BN_hex2bn(bn, p + 2))
+ return 0;
+ }
+ else
+ {
+ if (!BN_dec2bn(bn, p))
+ return 0;
+ }
+ if (*a == '-')
+ (*bn)->neg = 1;
+ return 1;
+ }
+
+#ifndef OPENSSL_NO_BIO
+#ifndef OPENSSL_NO_FP_API
+int BN_print_fp(FILE *fp, const BIGNUM *a)
{
BIO *b;
int ret;
}
#endif
-int BN_print(bp, a)
-BIO *bp;
-BIGNUM *a;
+int BN_print(BIO *bp, const BIGNUM *a)
{
int i,j,v,z=0;
int ret=0;
if ((a->neg) && (BIO_write(bp,"-",1) != 1)) goto end;
- if ((a->top == 0) && (BIO_write(bp,"0",1) != 1)) goto end;
+ if (BN_is_zero(a) && (BIO_write(bp,"0",1) != 1)) goto end;
for (i=a->top-1; i >=0; i--)
{
for (j=BN_BITS2-4; j >= 0; j-=4)
end:
return(ret);
}
-
#endif
projects / openssl.git / blobdiff