94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
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/*
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* Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#include <openssl/objects.h>
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#include <openssl/buffer.h>
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#include "crypto/bn.h"
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/* Number of octets per line */
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#define ASN1_BUF_PRINT_WIDTH 15
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/* Maximum indent */
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#define ASN1_PRINT_MAX_INDENT 128
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int ASN1_buf_print(BIO *bp, const unsigned char *buf, size_t buflen, int indent)
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{
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size_t i;
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for (i = 0; i < buflen; i++) {
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if ((i % ASN1_BUF_PRINT_WIDTH) == 0) {
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if (i > 0 && BIO_puts(bp, "\n") <= 0)
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return 0;
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if (!BIO_indent(bp, indent, ASN1_PRINT_MAX_INDENT))
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return 0;
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}
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/*
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* Use colon separators for each octet for compatibility as
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* this function is used to print out key components.
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*/
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if (BIO_printf(bp, "%02x%s", buf[i],
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(i == buflen - 1) ? "" : ":") <= 0)
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return 0;
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}
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if (BIO_write(bp, "\n", 1) <= 0)
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return 0;
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return 1;
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}
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int ASN1_bn_print(BIO *bp, const char *number, const BIGNUM *num,
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unsigned char *ign, int indent)
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{
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int n, rv = 0;
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const char *neg;
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unsigned char *buf = NULL, *tmp = NULL;
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int buflen;
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if (num == NULL)
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return 1;
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neg = BN_is_negative(num) ? "-" : "";
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if (!BIO_indent(bp, indent, ASN1_PRINT_MAX_INDENT))
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return 0;
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if (BN_is_zero(num)) {
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if (BIO_printf(bp, "%s 0\n", number) <= 0)
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return 0;
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return 1;
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}
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if (BN_num_bytes(num) <= BN_BYTES) {
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if (BIO_printf(bp, "%s %s%lu (%s0x%lx)\n", number, neg,
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(unsigned long)bn_get_words(num)[0], neg,
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(unsigned long)bn_get_words(num)[0]) <= 0)
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return 0;
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return 1;
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}
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buflen = BN_num_bytes(num) + 1;
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buf = tmp = OPENSSL_malloc(buflen);
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if (buf == NULL)
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goto err;
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buf[0] = 0;
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if (BIO_printf(bp, "%s%s\n", number,
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(neg[0] == '-') ? " (Negative)" : "") <= 0)
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goto err;
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n = BN_bn2bin(num, buf + 1);
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if (buf[1] & 0x80)
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n++;
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else
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tmp++;
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if (ASN1_buf_print(bp, tmp, n, indent + 4) == 0)
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goto err;
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rv = 1;
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err:
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OPENSSL_clear_free(buf, buflen);
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return rv;
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}
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