1 /*
2 * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10 #include <stdio.h>
11 #include <openssl/bio.h>
12 #include "bn_local.h"
13
14 static const char Hex[] = "0123456789ABCDEF";
15
16 #ifndef OPENSSL_NO_STDIO
BN_print_fp(FILE * fp,const BIGNUM * a)17 int BN_print_fp(FILE *fp, const BIGNUM *a)
18 {
19 BIO *b;
20 int ret;
21
22 if ((b = BIO_new(BIO_s_file())) == NULL)
23 return 0;
24 BIO_set_fp(b, fp, BIO_NOCLOSE);
25 ret = BN_print(b, a);
26 BIO_free(b);
27 return ret;
28 }
29 #endif
30
BN_print(BIO * bp,const BIGNUM * a)31 int BN_print(BIO *bp, const BIGNUM *a)
32 {
33 int i, j, v, z = 0;
34 int ret = 0;
35
36 if ((a->neg) && BIO_write(bp, "-", 1) != 1)
37 goto end;
38 if (BN_is_zero(a) && BIO_write(bp, "0", 1) != 1)
39 goto end;
40 for (i = a->top - 1; i >= 0; i--) {
41 for (j = BN_BITS2 - 4; j >= 0; j -= 4) {
42 /* strip leading zeros */
43 v = (int)((a->d[i] >> j) & 0x0f);
44 if (z || v != 0) {
45 if (BIO_write(bp, &Hex[v], 1) != 1)
46 goto end;
47 z = 1;
48 }
49 }
50 }
51 ret = 1;
52 end:
53 return ret;
54 }
55
BN_options(void)56 char *BN_options(void)
57 {
58 static int init = 0;
59 static char data[16];
60
61 if (!init) {
62 init++;
63 #ifdef BN_LLONG
64 BIO_snprintf(data, sizeof(data), "bn(%zu,%zu)",
65 sizeof(BN_ULLONG) * 8, sizeof(BN_ULONG) * 8);
66 #else
67 BIO_snprintf(data, sizeof(data), "bn(%zu,%zu)",
68 sizeof(BN_ULONG) * 8, sizeof(BN_ULONG) * 8);
69 #endif
70 }
71 return data;
72 }
73
