1 | /* |
2 | * Copyright 1995-2016 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 "internal/cryptlib.h" |
12 | #include <openssl/objects.h> |
13 | #include <openssl/buffer.h> |
14 | #include "crypto/bn.h" |
15 | |
16 | /* Number of octets per line */ |
17 | #define ASN1_BUF_PRINT_WIDTH 15 |
18 | /* Maximum indent */ |
19 | #define ASN1_PRINT_MAX_INDENT 128 |
20 | |
21 | int ASN1_buf_print(BIO *bp, const unsigned char *buf, size_t buflen, int indent) |
22 | { |
23 | size_t i; |
24 | |
25 | for (i = 0; i < buflen; i++) { |
26 | if ((i % ASN1_BUF_PRINT_WIDTH) == 0) { |
27 | if (i > 0 && BIO_puts(bp, "\n" ) <= 0) |
28 | return 0; |
29 | if (!BIO_indent(bp, indent, ASN1_PRINT_MAX_INDENT)) |
30 | return 0; |
31 | } |
32 | /* |
33 | * Use colon separators for each octet for compatibility as |
34 | * this function is used to print out key components. |
35 | */ |
36 | if (BIO_printf(bp, "%02x%s" , buf[i], |
37 | (i == buflen - 1) ? "" : ":" ) <= 0) |
38 | return 0; |
39 | } |
40 | if (BIO_write(bp, "\n" , 1) <= 0) |
41 | return 0; |
42 | return 1; |
43 | } |
44 | |
45 | int ASN1_bn_print(BIO *bp, const char *number, const BIGNUM *num, |
46 | unsigned char *ign, int indent) |
47 | { |
48 | int n, rv = 0; |
49 | const char *neg; |
50 | unsigned char *buf = NULL, *tmp = NULL; |
51 | int buflen; |
52 | |
53 | if (num == NULL) |
54 | return 1; |
55 | neg = BN_is_negative(num) ? "-" : "" ; |
56 | if (!BIO_indent(bp, indent, ASN1_PRINT_MAX_INDENT)) |
57 | return 0; |
58 | if (BN_is_zero(num)) { |
59 | if (BIO_printf(bp, "%s 0\n" , number) <= 0) |
60 | return 0; |
61 | return 1; |
62 | } |
63 | |
64 | if (BN_num_bytes(num) <= BN_BYTES) { |
65 | if (BIO_printf(bp, "%s %s%lu (%s0x%lx)\n" , number, neg, |
66 | (unsigned long)bn_get_words(num)[0], neg, |
67 | (unsigned long)bn_get_words(num)[0]) <= 0) |
68 | return 0; |
69 | return 1; |
70 | } |
71 | |
72 | buflen = BN_num_bytes(num) + 1; |
73 | buf = tmp = OPENSSL_malloc(buflen); |
74 | if (buf == NULL) |
75 | goto err; |
76 | buf[0] = 0; |
77 | if (BIO_printf(bp, "%s%s\n" , number, |
78 | (neg[0] == '-') ? " (Negative)" : "" ) <= 0) |
79 | goto err; |
80 | n = BN_bn2bin(num, buf + 1); |
81 | |
82 | if (buf[1] & 0x80) |
83 | n++; |
84 | else |
85 | tmp++; |
86 | |
87 | if (ASN1_buf_print(bp, tmp, n, indent + 4) == 0) |
88 | goto err; |
89 | rv = 1; |
90 | err: |
91 | OPENSSL_clear_free(buf, buflen); |
92 | return rv; |
93 | } |
94 | |