1/* 2 * Copyright 1999-2016 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/* X509 v3 extension utilities */ 11 12#include <stdio.h> 13#include "internal/cryptlib.h" 14#include <openssl/conf.h> 15#include <openssl/x509v3.h> 16 17/* Extension printing routines */ 18 19static int unknown_ext_print(BIO *out, const unsigned char *ext, int extlen, 20 unsigned long flag, int indent, int supported); 21 22/* Print out a name+value stack */ 23 24void X509V3_EXT_val_prn(BIO *out, STACK_OF(CONF_VALUE) *val, int indent, 25 int ml) 26{ 27 int i; 28 CONF_VALUE *nval; 29 if (!val) 30 return; 31 if (!ml || !sk_CONF_VALUE_num(val)) { 32 BIO_printf(out, "%*s", indent, ""); 33 if (!sk_CONF_VALUE_num(val)) 34 BIO_puts(out, "<EMPTY>\n"); 35 } 36 for (i = 0; i < sk_CONF_VALUE_num(val); i++) { 37 if (ml) 38 BIO_printf(out, "%*s", indent, ""); 39 else if (i > 0) 40 BIO_printf(out, ", "); 41 nval = sk_CONF_VALUE_value(val, i); 42 if (!nval->name) 43 BIO_puts(out, nval->value); 44 else if (!nval->value) 45 BIO_puts(out, nval->name); 46#ifndef CHARSET_EBCDIC 47 else 48 BIO_printf(out, "%s:%s", nval->name, nval->value); 49#else 50 else { 51 int len; 52 char *tmp; 53 len = strlen(nval->value) + 1; 54 tmp = OPENSSL_malloc(len); 55 if (tmp != NULL) { 56 ascii2ebcdic(tmp, nval->value, len); 57 BIO_printf(out, "%s:%s", nval->name, tmp); 58 OPENSSL_free(tmp); 59 } 60 } 61#endif 62 if (ml) 63 BIO_puts(out, "\n"); 64 } 65} 66 67/* Main routine: print out a general extension */ 68 69int X509V3_EXT_print(BIO *out, X509_EXTENSION *ext, unsigned long flag, 70 int indent) 71{ 72 void *ext_str = NULL; 73 char *value = NULL; 74 ASN1_OCTET_STRING *extoct; 75 const unsigned char *p; 76 int extlen; 77 const X509V3_EXT_METHOD *method; 78 STACK_OF(CONF_VALUE) *nval = NULL; 79 int ok = 1; 80 81 extoct = X509_EXTENSION_get_data(ext); 82 p = ASN1_STRING_get0_data(extoct); 83 extlen = ASN1_STRING_length(extoct); 84 85 if ((method = X509V3_EXT_get(ext)) == NULL) 86 return unknown_ext_print(out, p, extlen, flag, indent, 0); 87 if (method->it) 88 ext_str = ASN1_item_d2i(NULL, &p, extlen, ASN1_ITEM_ptr(method->it)); 89 else 90 ext_str = method->d2i(NULL, &p, extlen); 91 92 if (!ext_str) 93 return unknown_ext_print(out, p, extlen, flag, indent, 1); 94 95 if (method->i2s) { 96 if ((value = method->i2s(method, ext_str)) == NULL) { 97 ok = 0; 98 goto err; 99 } 100#ifndef CHARSET_EBCDIC 101 BIO_printf(out, "%*s%s", indent, "", value); 102#else 103 { 104 int len; 105 char *tmp; 106 len = strlen(value) + 1; 107 tmp = OPENSSL_malloc(len); 108 if (tmp != NULL) { 109 ascii2ebcdic(tmp, value, len); 110 BIO_printf(out, "%*s%s", indent, "", tmp); 111 OPENSSL_free(tmp); 112 } 113 } 114#endif 115 } else if (method->i2v) { 116 if ((nval = method->i2v(method, ext_str, NULL)) == NULL) { 117 ok = 0; 118 goto err; 119 } 120 X509V3_EXT_val_prn(out, nval, indent, 121 method->ext_flags & X509V3_EXT_MULTILINE); 122 } else if (method->i2r) { 123 if (!method->i2r(method, ext_str, out, indent)) 124 ok = 0; 125 } else 126 ok = 0; 127 128 err: 129 sk_CONF_VALUE_pop_free(nval, X509V3_conf_free); 130 OPENSSL_free(value); 131 if (method->it) 132 ASN1_item_free(ext_str, ASN1_ITEM_ptr(method->it)); 133 else 134 method->ext_free(ext_str); 135 return ok; 136} 137 138int X509V3_extensions_print(BIO *bp, const char *title, 139 const STACK_OF(X509_EXTENSION) *exts, 140 unsigned long flag, int indent) 141{ 142 int i, j; 143 144 if (sk_X509_EXTENSION_num(exts) <= 0) 145 return 1; 146 147 if (title) { 148 BIO_printf(bp, "%*s%s:\n", indent, "", title); 149 indent += 4; 150 } 151 152 for (i = 0; i < sk_X509_EXTENSION_num(exts); i++) { 153 ASN1_OBJECT *obj; 154 X509_EXTENSION *ex; 155 ex = sk_X509_EXTENSION_value(exts, i); 156 if (indent && BIO_printf(bp, "%*s", indent, "") <= 0) 157 return 0; 158 obj = X509_EXTENSION_get_object(ex); 159 i2a_ASN1_OBJECT(bp, obj); 160 j = X509_EXTENSION_get_critical(ex); 161 if (BIO_printf(bp, ": %s\n", j ? "critical" : "") <= 0) 162 return 0; 163 if (!X509V3_EXT_print(bp, ex, flag, indent + 4)) { 164 BIO_printf(bp, "%*s", indent + 4, ""); 165 ASN1_STRING_print(bp, X509_EXTENSION_get_data(ex)); 166 } 167 if (BIO_write(bp, "\n", 1) <= 0) 168 return 0; 169 } 170 return 1; 171} 172 173static int unknown_ext_print(BIO *out, const unsigned char *ext, int extlen, 174 unsigned long flag, int indent, int supported) 175{ 176 switch (flag & X509V3_EXT_UNKNOWN_MASK) { 177 178 case X509V3_EXT_DEFAULT: 179 return 0; 180 181 case X509V3_EXT_ERROR_UNKNOWN: 182 if (supported) 183 BIO_printf(out, "%*s<Parse Error>", indent, ""); 184 else 185 BIO_printf(out, "%*s<Not Supported>", indent, ""); 186 return 1; 187 188 case X509V3_EXT_PARSE_UNKNOWN: 189 return ASN1_parse_dump(out, ext, extlen, indent, -1); 190 case X509V3_EXT_DUMP_UNKNOWN: 191 return BIO_dump_indent(out, (const char *)ext, extlen, indent); 192 193 default: 194 return 1; 195 } 196} 197 198#ifndef OPENSSL_NO_STDIO 199int X509V3_EXT_print_fp(FILE *fp, X509_EXTENSION *ext, int flag, int indent) 200{ 201 BIO *bio_tmp; 202 int ret; 203 204 if ((bio_tmp = BIO_new_fp(fp, BIO_NOCLOSE)) == NULL) 205 return 0; 206 ret = X509V3_EXT_print(bio_tmp, ext, flag, indent); 207 BIO_free(bio_tmp); 208 return ret; 209} 210#endif 211