-static char *Hex="0123456789ABCDEF";
-
-/* Must 'Free' the returned data */
-char *BN_bn2ascii(a)
-BIGNUM *a;
- {
- int i,j,v,z=0;
- char *buf;
- char *p;
-
- buf=(char *)Malloc(a->top*BN_BYTES*2+2);
- if (buf == NULL)
- {
- BNerr(BN_F_BN_BN2ASCII,ERR_R_MALLOC_FAILURE);
- goto err;
- }
- p=buf;
- if (a->neg) *(p++)='-';
- if (a->top == 0) *(p++)='0';
- for (i=a->top-1; i >=0; i--)
- {
- for (j=BN_BITS2-8; j >= 0; j-=8)
- {
- /* strip leading zeros */
- v=((int)(a->d[i]>>(long)j))&0xff;
- if (z || (v != 0))
- {
- *(p++)=Hex[v>>4];
- *(p++)=Hex[v&0x0f];
- z=1;
- }
- }
- }
- *p='\0';
-err:
- return(buf);
- }
-
-int BN_ascii2bn(bn,a)
-BIGNUM **bn;
-char *a;
- {
- BIGNUM *ret=NULL;
- BN_ULONG l=0;
- int neg=0,h,m,i,j,k,c;
- int num;
-
- if ((a == NULL) || (*a == '\0')) return(0);
-
- if (*a == '-') { neg=1; a++; }
-
- for (i=0; isxdigit(a[i]); i++)
- ;
-
- num=i+neg;
- if (bn == NULL) return(num);
-
- /* a is the start of the hex digets, and it is 'i' long */
- if (*bn == NULL)
- {
- if ((ret=BN_new()) == NULL) return(0);
- }
- else
- {
- ret= *bn;
- BN_zero(ret);
- }
-
- /* i is the number of hex digests; */
- if (bn_expand(ret,i*4) == NULL) goto err;
-
- j=i; /* least significate 'hex' */
- m=0;
- h=0;
- while (j > 0)
- {
- m=((BN_BYTES*2) <= j)?(BN_BYTES*2):j;
- l=0;
- for (;;)
- {
- c=a[j-m];
- if ((c >= '0') && (c <= '9')) k=c-'0';
- else if ((c >= 'a') && (c <= 'f')) k=c-'a'+10;
- else if ((c >= 'A') && (c <= 'F')) k=c-'A'+10;
- else k=0; /* paranoia */
- l=(l<<4)|k;
-
- if (--m <= 0)
- {
- ret->d[h++]=l;
- break;
- }
- }
- j-=(BN_BYTES*2);
- }
- ret->top=h;
- bn_fix_top(ret);
- ret->neg=neg;
-
- *bn=ret;
- return(num);
-err:
- if (*bn == NULL) BN_free(ret);
- return(0);
- }
-
-#ifndef NO_BIO
-
-#ifndef WIN16
-int BN_print_fp(fp, a)
-FILE *fp;
-BIGNUM *a;
- {
- BIO *b;
- int ret;
-
- if ((b=BIO_new(BIO_s_file())) == NULL)
- return(0);
- BIO_set_fp(b,fp,BIO_NOCLOSE);
- ret=BN_print(b,a);
- BIO_free(b);
- return(ret);
- }
-#endif
+static const char Hex[] = "0123456789ABCDEF";
+
+/* Must 'OPENSSL_free' the returned data */
+char *BN_bn2hex(const BIGNUM *a)
+{
+ int i, j, v, z = 0;
+ char *buf;
+ char *p;
+
+ if (a->neg && BN_is_zero(a)) {
+ /* "-0" == 3 bytes including NULL terminator */
+ buf = OPENSSL_malloc(3);
+ } else {
+ buf = OPENSSL_malloc(a->top * BN_BYTES * 2 + 2);
+ }
+ if (buf == NULL) {
+ BNerr(BN_F_BN_BN2HEX, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+ p = buf;
+ if (a->neg)
+ *(p++) = '-';
+ if (BN_is_zero(a))
+ *(p++) = '0';
+ for (i = a->top - 1; i >= 0; i--) {
+ for (j = BN_BITS2 - 8; j >= 0; j -= 8) {
+ /* strip leading zeros */
+ v = ((int)(a->d[i] >> (long)j)) & 0xff;
+ if (z || (v != 0)) {
+ *(p++) = Hex[v >> 4];
+ *(p++) = Hex[v & 0x0f];
+ z = 1;
+ }
+ }
+ }
+ *p = '\0';
+ err:
+ return (buf);
+}
+
+/* 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 = OPENSSL_malloc((num / BN_DEC_NUM + 1) * sizeof(BN_ULONG));
+ buf = 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:
+ OPENSSL_free(bn_data);
+ BN_free(t);
+ if (ok)
+ return buf;
+ OPENSSL_free(buf);
+ return NULL;
+}
+
+int BN_hex2bn(BIGNUM **bn, const char *a)
+{
+ BIGNUM *ret = NULL;
+ BN_ULONG l = 0;
+ int neg = 0, h, m, i, j, k, c;
+ int num;
+
+ if ((a == NULL) || (*a == '\0'))
+ return (0);
+
+ if (*a == '-') {
+ neg = 1;
+ a++;
+ }
+
+ for (i = 0; isxdigit((unsigned char)a[i]); i++) ;
+
+ num = i + neg;
+ if (bn == NULL)
+ return (num);
+
+ /* a is the start of the hex digits, and it is 'i' long */
+ if (*bn == NULL) {
+ if ((ret = BN_new()) == NULL)
+ return (0);
+ } else {
+ ret = *bn;
+ BN_zero(ret);
+ }
+
+ /* i is the number of hex digests; */
+ if (bn_expand(ret, i * 4) == NULL)
+ goto err;
+
+ j = i; /* least significant 'hex' */
+ m = 0;
+ h = 0;
+ while (j > 0) {
+ m = ((BN_BYTES * 2) <= j) ? (BN_BYTES * 2) : j;
+ l = 0;
+ for (;;) {
+ c = a[j - m];
+ if ((c >= '0') && (c <= '9'))
+ k = c - '0';
+ else if ((c >= 'a') && (c <= 'f'))
+ k = c - 'a' + 10;
+ else if ((c >= 'A') && (c <= 'F'))
+ k = c - 'A' + 10;
+ else
+ k = 0; /* paranoia */
+ l = (l << 4) | k;
+
+ if (--m <= 0) {
+ ret->d[h++] = l;
+ break;
+ }
+ }
+ j -= (BN_BYTES * 2);
+ }
+ ret->top = h;
+ bn_correct_top(ret);
+ ret->neg = neg;
+
+ *bn = ret;
+ bn_check_top(ret);
+ return (num);
+ err:
+ if (*bn == NULL)
+ BN_free(ret);
+ return (0);
+}
+
+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++;
+ }
+
+ 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_STDIO
+int BN_print_fp(FILE *fp, const BIGNUM *a)
+{
+ BIO *b;
+ int ret;
+
+ if ((b = BIO_new(BIO_s_file())) == NULL)
+ return (0);
+ BIO_set_fp(b, fp, BIO_NOCLOSE);
+ ret = BN_print(b, a);
+ BIO_free(b);
+ return (ret);
+}
+# endif
+
+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 (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) {
+ /* strip leading zeros */
+ v = ((int)(a->d[i] >> (long)j)) & 0x0f;
+ if (z || (v != 0)) {
+ if (BIO_write(bp, &(Hex[v]), 1) != 1)
+ goto end;
+ z = 1;
+ }
+ }
+ }
+ ret = 1;
+ end:
+ return (ret);
+}