| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved. |
| 3 | * |
| 4 | * Licensed under the OpenSSL license (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 | } |