| 1 | /*
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| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #include <openssl/objects.h>
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| 13 | #include <openssl/buffer.h>
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| 14 | #include "crypto/bn.h"
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| 15 |
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| 16 | /* Number of octets per line */
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| 17 | #define ASN1_BUF_PRINT_WIDTH 15
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| 18 | /* Maximum indent */
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| 19 | #define ASN1_PRINT_MAX_INDENT 128
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| 20 |
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| 21 | int ASN1_buf_print(BIO *bp, const unsigned char *buf, size_t buflen, int indent)
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| 22 | {
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| 23 | size_t i;
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| 24 |
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| 25 | for (i = 0; i < buflen; i++) {
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| 26 | if ((i % ASN1_BUF_PRINT_WIDTH) == 0) {
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| 27 | if (i > 0 && BIO_puts(bp, "\n") <= 0)
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| 28 | return 0;
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| 29 | if (!BIO_indent(bp, indent, ASN1_PRINT_MAX_INDENT))
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| 30 | return 0;
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| 31 | }
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| 32 | /*
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| 33 | * Use colon separators for each octet for compatibility as
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| 34 | * this function is used to print out key components.
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| 35 | */
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| 36 | if (BIO_printf(bp, "%02x%s", buf[i],
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| 37 | (i == buflen - 1) ? "" : ":") <= 0)
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| 38 | return 0;
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| 39 | }
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| 40 | if (BIO_write(bp, "\n", 1) <= 0)
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| 41 | return 0;
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| 42 | return 1;
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| 43 | }
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| 44 |
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| 45 | int ASN1_bn_print(BIO *bp, const char *number, const BIGNUM *num,
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| 46 | unsigned char *ign, int indent)
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| 47 | {
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| 48 | int n, rv = 0;
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| 49 | const char *neg;
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| 50 | unsigned char *buf = NULL, *tmp = NULL;
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| 51 | int buflen;
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| 52 |
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| 53 | if (num == NULL)
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| 54 | return 1;
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| 55 | neg = BN_is_negative(num) ? "-" : "";
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| 56 | if (!BIO_indent(bp, indent, ASN1_PRINT_MAX_INDENT))
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| 57 | return 0;
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| 58 | if (BN_is_zero(num)) {
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| 59 | if (BIO_printf(bp, "%s 0\n", number) <= 0)
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| 60 | return 0;
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| 61 | return 1;
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| 62 | }
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| 63 |
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| 64 | if (BN_num_bytes(num) <= BN_BYTES) {
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| 65 | if (BIO_printf(bp, "%s %s%lu (%s0x%lx)\n", number, neg,
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| 66 | (unsigned long)bn_get_words(num)[0], neg,
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| 67 | (unsigned long)bn_get_words(num)[0]) <= 0)
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| 68 | return 0;
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| 69 | return 1;
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| 70 | }
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| 71 |
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| 72 | buflen = BN_num_bytes(num) + 1;
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| 73 | buf = tmp = OPENSSL_malloc(buflen);
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| 74 | if (buf == NULL)
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| 75 | goto err;
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| 76 | buf[0] = 0;
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| 77 | if (BIO_printf(bp, "%s%s\n", number,
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| 78 | (neg[0] == '-') ? " (Negative)" : "") <= 0)
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| 79 | goto err;
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| 80 | n = BN_bn2bin(num, buf + 1);
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| 81 |
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| 82 | if (buf[1] & 0x80)
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| 83 | n++;
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| 84 | else
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| 85 | tmp++;
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| 86 |
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| 87 | if (ASN1_buf_print(bp, tmp, n, indent + 4) == 0)
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| 88 | goto err;
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| 89 | rv = 1;
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| 90 | err:
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| 91 | OPENSSL_clear_free(buf, buflen);
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| 92 | return rv;
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| 93 | }
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