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