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1 /* pk7_mime.c */ |
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2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL |
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3 * project. |
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4 */ |
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5 /* ==================================================================== |
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6 * Copyright (c) 1999-2005 The OpenSSL Project. All rights reserved. |
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7 * |
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8 * Redistribution and use in source and binary forms, with or without |
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9 * modification, are permitted provided that the following conditions |
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10 * are met: |
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11 * |
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12 * 1. Redistributions of source code must retain the above copyright |
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13 * notice, this list of conditions and the following disclaimer. |
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14 * |
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15 * 2. Redistributions in binary form must reproduce the above copyright |
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16 * notice, this list of conditions and the following disclaimer in |
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17 * the documentation and/or other materials provided with the |
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18 * distribution. |
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19 * |
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20 * 3. All advertising materials mentioning features or use of this |
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21 * software must display the following acknowledgment: |
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22 * "This product includes software developed by the OpenSSL Project |
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23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
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24 * |
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25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
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26 * endorse or promote products derived from this software without |
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27 * prior written permission. For written permission, please contact |
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28 * licensing@OpenSSL.org. |
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29 * |
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30 * 5. Products derived from this software may not be called "OpenSSL" |
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31 * nor may "OpenSSL" appear in their names without prior written |
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32 * permission of the OpenSSL Project. |
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33 * |
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34 * 6. Redistributions of any form whatsoever must retain the following |
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35 * acknowledgment: |
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36 * "This product includes software developed by the OpenSSL Project |
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37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
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38 * |
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39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
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40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
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42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
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43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
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48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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50 * OF THE POSSIBILITY OF SUCH DAMAGE. |
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51 * ==================================================================== |
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52 * |
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53 * This product includes cryptographic software written by Eric Young |
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54 * (eay@cryptsoft.com). This product includes software written by Tim |
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55 * Hudson (tjh@cryptsoft.com). |
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56 * |
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57 */ |
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58 /* |
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59 © Portions copyright (c) 2006 Nokia Corporation. All rights reserved. |
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60 */ |
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61 #include <stdio.h> |
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62 #include <ctype.h> |
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63 #include "cryptlib.h" |
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64 #include <openssl/rand.h> |
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65 #include <openssl/x509.h> |
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66 |
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67 /* MIME and related routines */ |
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68 |
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69 /* MIME format structures |
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70 * Note that all are translated to lower case apart from |
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71 * parameter values. Quotes are stripped off |
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72 */ |
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73 |
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74 typedef struct { |
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75 char *param_name; /* Param name e.g. "micalg" */ |
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76 char *param_value; /* Param value e.g. "sha1" */ |
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77 } MIME_PARAM; |
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78 |
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79 DECLARE_STACK_OF(MIME_PARAM) |
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80 IMPLEMENT_STACK_OF(MIME_PARAM) |
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81 |
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82 typedef struct { |
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83 char *name; /* Name of line e.g. "content-type" */ |
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84 char *value; /* Value of line e.g. "text/plain" */ |
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85 STACK_OF(MIME_PARAM) *params; /* Zero or more parameters */ |
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86 } MIME_HEADER; |
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87 |
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88 DECLARE_STACK_OF(MIME_HEADER) |
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89 IMPLEMENT_STACK_OF(MIME_HEADER) |
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90 |
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91 static int pkcs7_output_data(BIO *bio, BIO *data, PKCS7 *p7, int flags); |
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92 static int B64_write_PKCS7(BIO *bio, PKCS7 *p7); |
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93 static PKCS7 *B64_read_PKCS7(BIO *bio); |
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94 static char * strip_ends(char *name); |
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95 static char * strip_start(char *name); |
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96 static char * strip_end(char *name); |
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97 static MIME_HEADER *mime_hdr_new(char *name, char *value); |
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98 static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value); |
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99 static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio); |
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100 static int mime_hdr_cmp(const MIME_HEADER * const *a, |
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101 const MIME_HEADER * const *b); |
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102 static int mime_param_cmp(const MIME_PARAM * const *a, |
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103 const MIME_PARAM * const *b); |
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104 static void mime_param_free(MIME_PARAM *param); |
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105 static int mime_bound_check(char *line, int linelen, char *bound, int blen); |
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106 static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret); |
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107 static int strip_eol(char *linebuf, int *plen); |
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108 static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name); |
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109 static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name); |
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110 static void mime_hdr_free(MIME_HEADER *hdr); |
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111 |
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112 #define MAX_SMLEN 1024 |
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113 #define mime_debug(x) /* x */ |
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114 |
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115 /* Base 64 read and write of PKCS#7 structure */ |
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116 |
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117 static int B64_write_PKCS7(BIO *bio, PKCS7 *p7) |
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118 { |
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119 BIO *b64; |
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120 if(!(b64 = BIO_new(BIO_f_base64()))) { |
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121 PKCS7err(PKCS7_F_B64_WRITE_PKCS7,ERR_R_MALLOC_FAILURE); |
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122 return 0; |
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123 } |
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124 bio = BIO_push(b64, bio); |
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125 i2d_PKCS7_bio(bio, p7); |
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126 (void)BIO_flush(bio); |
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127 bio = BIO_pop(bio); |
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128 BIO_free(b64); |
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129 return 1; |
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130 } |
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131 |
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132 static PKCS7 *B64_read_PKCS7(BIO *bio) |
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133 { |
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134 BIO *b64; |
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135 PKCS7 *p7; |
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136 if(!(b64 = BIO_new(BIO_f_base64()))) { |
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137 PKCS7err(PKCS7_F_B64_READ_PKCS7,ERR_R_MALLOC_FAILURE); |
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138 return 0; |
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139 } |
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140 bio = BIO_push(b64, bio); |
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141 if(!(p7 = d2i_PKCS7_bio(bio, NULL))) |
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142 PKCS7err(PKCS7_F_B64_READ_PKCS7,PKCS7_R_DECODE_ERROR); |
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143 (void)BIO_flush(bio); |
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144 bio = BIO_pop(bio); |
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145 BIO_free(b64); |
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146 return p7; |
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147 } |
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148 |
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149 /* SMIME sender */ |
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150 |
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151 EXPORT_C int SMIME_write_PKCS7(BIO *bio, PKCS7 *p7, BIO *data, int flags) |
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152 { |
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153 char bound[33], c; |
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154 int i; |
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155 char *mime_prefix, *mime_eol, *msg_type=NULL; |
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156 if (flags & PKCS7_NOOLDMIMETYPE) |
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157 mime_prefix = "application/pkcs7-"; |
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158 else |
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159 mime_prefix = "application/x-pkcs7-"; |
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160 |
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161 if (flags & PKCS7_CRLFEOL) |
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162 mime_eol = "\r\n"; |
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163 else |
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164 mime_eol = "\n"; |
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165 if((flags & PKCS7_DETACHED) && data) { |
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166 /* We want multipart/signed */ |
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167 /* Generate a random boundary */ |
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168 RAND_pseudo_bytes((unsigned char *)bound, 32); |
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169 for(i = 0; i < 32; i++) { |
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170 c = bound[i] & 0xf; |
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171 if(c < 10) c += '0'; |
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172 else c += 'A' - 10; |
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173 bound[i] = c; |
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174 } |
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175 bound[32] = 0; |
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176 BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol); |
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177 BIO_printf(bio, "Content-Type: multipart/signed;"); |
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178 BIO_printf(bio, " protocol=\"%ssignature\";", mime_prefix); |
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179 BIO_printf(bio, " micalg=sha1; boundary=\"----%s\"%s%s", |
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180 bound, mime_eol, mime_eol); |
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181 BIO_printf(bio, "This is an S/MIME signed message%s%s", |
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182 mime_eol, mime_eol); |
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183 /* Now write out the first part */ |
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184 BIO_printf(bio, "------%s%s", bound, mime_eol); |
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185 pkcs7_output_data(bio, data, p7, flags); |
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186 BIO_printf(bio, "%s------%s%s", mime_eol, bound, mime_eol); |
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187 |
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188 /* Headers for signature */ |
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189 |
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190 BIO_printf(bio, "Content-Type: %ssignature;", mime_prefix); |
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191 BIO_printf(bio, " name=\"smime.p7s\"%s", mime_eol); |
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192 BIO_printf(bio, "Content-Transfer-Encoding: base64%s", |
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193 mime_eol); |
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194 BIO_printf(bio, "Content-Disposition: attachment;"); |
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195 BIO_printf(bio, " filename=\"smime.p7s\"%s%s", |
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196 mime_eol, mime_eol); |
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197 B64_write_PKCS7(bio, p7); |
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198 BIO_printf(bio,"%s------%s--%s%s", mime_eol, bound, |
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199 mime_eol, mime_eol); |
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200 return 1; |
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201 } |
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202 |
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203 /* Determine smime-type header */ |
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204 |
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205 if (PKCS7_type_is_enveloped(p7)) |
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206 msg_type = "enveloped-data"; |
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207 else if (PKCS7_type_is_signed(p7)) |
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208 { |
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209 /* If we have any signers it is signed-data othewise |
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210 * certs-only. |
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211 */ |
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212 STACK_OF(PKCS7_SIGNER_INFO) *sinfos; |
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213 sinfos = PKCS7_get_signer_info(p7); |
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214 if (sk_PKCS7_SIGNER_INFO_num(sinfos) > 0) |
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215 msg_type = "signed-data"; |
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216 else |
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217 msg_type = "certs-only"; |
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218 } |
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219 /* MIME headers */ |
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220 BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol); |
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221 BIO_printf(bio, "Content-Disposition: attachment;"); |
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222 BIO_printf(bio, " filename=\"smime.p7m\"%s", mime_eol); |
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223 BIO_printf(bio, "Content-Type: %smime;", mime_prefix); |
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224 if (msg_type) |
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225 BIO_printf(bio, " smime-type=%s;", msg_type); |
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226 BIO_printf(bio, " name=\"smime.p7m\"%s", mime_eol); |
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227 BIO_printf(bio, "Content-Transfer-Encoding: base64%s%s", |
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228 mime_eol, mime_eol); |
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229 B64_write_PKCS7(bio, p7); |
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230 BIO_printf(bio, "%s", mime_eol); |
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231 return 1; |
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232 } |
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233 |
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234 /* Handle output of PKCS#7 data */ |
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235 |
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236 |
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237 static int pkcs7_output_data(BIO *out, BIO *data, PKCS7 *p7, int flags) |
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238 { |
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239 BIO *tmpbio, *p7bio; |
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240 |
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241 if (!(flags & PKCS7_STREAM)) |
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242 { |
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243 SMIME_crlf_copy(data, out, flags); |
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244 return 1; |
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245 } |
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246 |
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247 /* Partial sign operation */ |
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248 |
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249 /* Initialize sign operation */ |
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250 p7bio = PKCS7_dataInit(p7, out); |
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251 |
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252 /* Copy data across, computing digests etc */ |
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253 SMIME_crlf_copy(data, p7bio, flags); |
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254 |
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255 /* Must be detached */ |
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256 PKCS7_set_detached(p7, 1); |
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257 |
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258 /* Finalize signatures */ |
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259 PKCS7_dataFinal(p7, p7bio); |
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260 |
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261 /* Now remove any digests prepended to the BIO */ |
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262 |
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263 while (p7bio != out) |
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264 { |
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265 tmpbio = BIO_pop(p7bio); |
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266 BIO_free(p7bio); |
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267 p7bio = tmpbio; |
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268 } |
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269 |
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270 return 1; |
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271 |
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272 } |
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273 |
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274 /* SMIME reader: handle multipart/signed and opaque signing. |
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275 * in multipart case the content is placed in a memory BIO |
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276 * pointed to by "bcont". In opaque this is set to NULL |
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277 */ |
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278 |
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279 EXPORT_C PKCS7 *SMIME_read_PKCS7(BIO *bio, BIO **bcont) |
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280 { |
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281 BIO *p7in; |
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282 STACK_OF(MIME_HEADER) *headers = NULL; |
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283 STACK_OF(BIO) *parts = NULL; |
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284 MIME_HEADER *hdr; |
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285 MIME_PARAM *prm; |
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286 PKCS7 *p7; |
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287 int ret; |
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288 |
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289 if(bcont) *bcont = NULL; |
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290 |
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291 if (!(headers = mime_parse_hdr(bio))) { |
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292 PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_MIME_PARSE_ERROR); |
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293 return NULL; |
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294 } |
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295 |
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296 if(!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) { |
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297 sk_MIME_HEADER_pop_free(headers, mime_hdr_free); |
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298 PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_NO_CONTENT_TYPE); |
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299 return NULL; |
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300 } |
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301 |
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302 /* Handle multipart/signed */ |
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303 |
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304 if(!strcmp(hdr->value, "multipart/signed")) { |
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305 /* Split into two parts */ |
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306 prm = mime_param_find(hdr, "boundary"); |
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307 if(!prm || !prm->param_value) { |
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308 sk_MIME_HEADER_pop_free(headers, mime_hdr_free); |
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309 PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_NO_MULTIPART_BOUNDARY); |
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310 return NULL; |
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311 } |
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312 ret = multi_split(bio, prm->param_value, &parts); |
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313 sk_MIME_HEADER_pop_free(headers, mime_hdr_free); |
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314 if(!ret || (sk_BIO_num(parts) != 2) ) { |
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315 PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_NO_MULTIPART_BODY_FAILURE); |
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316 sk_BIO_pop_free(parts, BIO_vfree); |
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317 return NULL; |
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318 } |
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319 |
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320 /* Parse the signature piece */ |
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321 p7in = sk_BIO_value(parts, 1); |
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322 |
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323 if (!(headers = mime_parse_hdr(p7in))) { |
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324 PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_MIME_SIG_PARSE_ERROR); |
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325 sk_BIO_pop_free(parts, BIO_vfree); |
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326 return NULL; |
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327 } |
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328 |
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329 /* Get content type */ |
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330 |
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331 if(!(hdr = mime_hdr_find(headers, "content-type")) || |
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332 !hdr->value) { |
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333 sk_MIME_HEADER_pop_free(headers, mime_hdr_free); |
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334 PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_NO_SIG_CONTENT_TYPE); |
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335 return NULL; |
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336 } |
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337 |
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338 if(strcmp(hdr->value, "application/x-pkcs7-signature") && |
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339 strcmp(hdr->value, "application/pkcs7-signature")) { |
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340 sk_MIME_HEADER_pop_free(headers, mime_hdr_free); |
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341 PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_SIG_INVALID_MIME_TYPE); |
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342 ERR_add_error_data(2, "type: ", hdr->value); |
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343 sk_BIO_pop_free(parts, BIO_vfree); |
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344 return NULL; |
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345 } |
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346 sk_MIME_HEADER_pop_free(headers, mime_hdr_free); |
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347 /* Read in PKCS#7 */ |
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348 if(!(p7 = B64_read_PKCS7(p7in))) { |
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349 PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_PKCS7_SIG_PARSE_ERROR); |
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350 sk_BIO_pop_free(parts, BIO_vfree); |
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351 return NULL; |
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352 } |
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353 |
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354 if(bcont) { |
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355 *bcont = sk_BIO_value(parts, 0); |
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356 BIO_free(p7in); |
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357 sk_BIO_free(parts); |
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358 } else sk_BIO_pop_free(parts, BIO_vfree); |
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359 return p7; |
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360 } |
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361 |
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362 /* OK, if not multipart/signed try opaque signature */ |
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363 |
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364 if (strcmp (hdr->value, "application/x-pkcs7-mime") && |
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365 strcmp (hdr->value, "application/pkcs7-mime")) { |
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366 PKCS7err(PKCS7_F_SMIME_READ_PKCS7,PKCS7_R_INVALID_MIME_TYPE); |
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367 ERR_add_error_data(2, "type: ", hdr->value); |
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368 sk_MIME_HEADER_pop_free(headers, mime_hdr_free); |
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369 return NULL; |
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370 } |
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371 |
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372 sk_MIME_HEADER_pop_free(headers, mime_hdr_free); |
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373 |
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374 if(!(p7 = B64_read_PKCS7(bio))) { |
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375 PKCS7err(PKCS7_F_SMIME_READ_PKCS7, PKCS7_R_PKCS7_PARSE_ERROR); |
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376 return NULL; |
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377 } |
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378 return p7; |
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379 |
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380 } |
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381 |
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382 /* Copy text from one BIO to another making the output CRLF at EOL */ |
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383 EXPORT_C int SMIME_crlf_copy(BIO *in, BIO *out, int flags) |
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384 { |
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385 char eol; |
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386 int len; |
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387 char linebuf[MAX_SMLEN]; |
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388 if(flags & PKCS7_BINARY) { |
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389 while((len = BIO_read(in, linebuf, MAX_SMLEN)) > 0) |
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390 BIO_write(out, linebuf, len); |
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391 return 1; |
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392 } |
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393 if(flags & PKCS7_TEXT) |
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394 BIO_printf(out, "Content-Type: text/plain\r\n\r\n"); |
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395 while ((len = BIO_gets(in, linebuf, MAX_SMLEN)) > 0) { |
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396 eol = strip_eol(linebuf, &len); |
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397 if (len) |
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398 BIO_write(out, linebuf, len); |
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399 if(eol) BIO_write(out, "\r\n", 2); |
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400 } |
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401 return 1; |
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402 } |
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403 |
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404 /* Strip off headers if they are text/plain */ |
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405 EXPORT_C int SMIME_text(BIO *in, BIO *out) |
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406 { |
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407 #ifndef SYMBIAN |
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408 char iobuf[4096]; |
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409 #else |
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410 char iobuf[512]; |
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411 #endif |
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412 int len; |
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413 STACK_OF(MIME_HEADER) *headers; |
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414 MIME_HEADER *hdr; |
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415 |
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416 if (!(headers = mime_parse_hdr(in))) { |
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417 PKCS7err(PKCS7_F_SMIME_TEXT,PKCS7_R_MIME_PARSE_ERROR); |
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418 return 0; |
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419 } |
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420 if(!(hdr = mime_hdr_find(headers, "content-type")) || !hdr->value) { |
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421 PKCS7err(PKCS7_F_SMIME_TEXT,PKCS7_R_MIME_NO_CONTENT_TYPE); |
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422 sk_MIME_HEADER_pop_free(headers, mime_hdr_free); |
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423 return 0; |
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424 } |
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425 if (strcmp (hdr->value, "text/plain")) { |
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426 PKCS7err(PKCS7_F_SMIME_TEXT,PKCS7_R_INVALID_MIME_TYPE); |
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427 ERR_add_error_data(2, "type: ", hdr->value); |
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428 sk_MIME_HEADER_pop_free(headers, mime_hdr_free); |
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429 return 0; |
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430 } |
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431 sk_MIME_HEADER_pop_free(headers, mime_hdr_free); |
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432 while ((len = BIO_read(in, iobuf, sizeof(iobuf))) > 0) |
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433 BIO_write(out, iobuf, len); |
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434 return 1; |
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435 } |
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436 |
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437 /* Split a multipart/XXX message body into component parts: result is |
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438 * canonical parts in a STACK of bios |
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439 */ |
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440 |
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441 static int multi_split(BIO *bio, char *bound, STACK_OF(BIO) **ret) |
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442 { |
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443 char linebuf[MAX_SMLEN]; |
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444 int len, blen; |
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445 int eol = 0, next_eol = 0; |
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446 BIO *bpart = NULL; |
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447 STACK_OF(BIO) *parts; |
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448 char state, part, first; |
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449 |
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450 blen = strlen(bound); |
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451 part = 0; |
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452 state = 0; |
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453 first = 1; |
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454 parts = sk_BIO_new_null(); |
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455 *ret = parts; |
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456 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) { |
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457 state = mime_bound_check(linebuf, len, bound, blen); |
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458 if(state == 1) { |
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459 first = 1; |
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460 part++; |
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461 } else if(state == 2) { |
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462 sk_BIO_push(parts, bpart); |
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463 return 1; |
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464 } else if(part) { |
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465 /* Strip CR+LF from linebuf */ |
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466 next_eol = strip_eol(linebuf, &len); |
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467 if(first) { |
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468 first = 0; |
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469 if(bpart) sk_BIO_push(parts, bpart); |
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470 bpart = BIO_new(BIO_s_mem()); |
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471 BIO_set_mem_eof_return(bpart, 0); |
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472 } else if (eol) |
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473 BIO_write(bpart, "\r\n", 2); |
|
474 eol = next_eol; |
|
475 if (len) |
|
476 BIO_write(bpart, linebuf, len); |
|
477 } |
|
478 } |
|
479 return 0; |
|
480 } |
|
481 |
|
482 /* This is the big one: parse MIME header lines up to message body */ |
|
483 |
|
484 #define MIME_INVALID 0 |
|
485 #define MIME_START 1 |
|
486 #define MIME_TYPE 2 |
|
487 #define MIME_NAME 3 |
|
488 #define MIME_VALUE 4 |
|
489 #define MIME_QUOTE 5 |
|
490 #define MIME_COMMENT 6 |
|
491 |
|
492 |
|
493 static STACK_OF(MIME_HEADER) *mime_parse_hdr(BIO *bio) |
|
494 { |
|
495 char *p, *q, c; |
|
496 char *ntmp; |
|
497 char linebuf[MAX_SMLEN]; |
|
498 MIME_HEADER *mhdr = NULL; |
|
499 STACK_OF(MIME_HEADER) *headers; |
|
500 int len, state, save_state = 0; |
|
501 |
|
502 headers = sk_MIME_HEADER_new(mime_hdr_cmp); |
|
503 while ((len = BIO_gets(bio, linebuf, MAX_SMLEN)) > 0) { |
|
504 /* If whitespace at line start then continuation line */ |
|
505 if(mhdr && isspace((unsigned char)linebuf[0])) state = MIME_NAME; |
|
506 else state = MIME_START; |
|
507 ntmp = NULL; |
|
508 /* Go through all characters */ |
|
509 for(p = linebuf, q = linebuf; (c = *p) && (c!='\r') && (c!='\n'); p++) { |
|
510 |
|
511 /* State machine to handle MIME headers |
|
512 * if this looks horrible that's because it *is* |
|
513 */ |
|
514 |
|
515 switch(state) { |
|
516 case MIME_START: |
|
517 if(c == ':') { |
|
518 state = MIME_TYPE; |
|
519 *p = 0; |
|
520 ntmp = strip_ends(q); |
|
521 q = p + 1; |
|
522 } |
|
523 break; |
|
524 |
|
525 case MIME_TYPE: |
|
526 if(c == ';') { |
|
527 mime_debug("Found End Value\n"); |
|
528 *p = 0; |
|
529 mhdr = mime_hdr_new(ntmp, strip_ends(q)); |
|
530 sk_MIME_HEADER_push(headers, mhdr); |
|
531 ntmp = NULL; |
|
532 q = p + 1; |
|
533 state = MIME_NAME; |
|
534 } else if(c == '(') { |
|
535 save_state = state; |
|
536 state = MIME_COMMENT; |
|
537 } |
|
538 break; |
|
539 |
|
540 case MIME_COMMENT: |
|
541 if(c == ')') { |
|
542 state = save_state; |
|
543 } |
|
544 break; |
|
545 |
|
546 case MIME_NAME: |
|
547 if(c == '=') { |
|
548 state = MIME_VALUE; |
|
549 *p = 0; |
|
550 ntmp = strip_ends(q); |
|
551 q = p + 1; |
|
552 } |
|
553 break ; |
|
554 |
|
555 case MIME_VALUE: |
|
556 if(c == ';') { |
|
557 state = MIME_NAME; |
|
558 *p = 0; |
|
559 mime_hdr_addparam(mhdr, ntmp, strip_ends(q)); |
|
560 ntmp = NULL; |
|
561 q = p + 1; |
|
562 } else if (c == '"') { |
|
563 mime_debug("Found Quote\n"); |
|
564 state = MIME_QUOTE; |
|
565 } else if(c == '(') { |
|
566 save_state = state; |
|
567 state = MIME_COMMENT; |
|
568 } |
|
569 break; |
|
570 |
|
571 case MIME_QUOTE: |
|
572 if(c == '"') { |
|
573 mime_debug("Found Match Quote\n"); |
|
574 state = MIME_VALUE; |
|
575 } |
|
576 break; |
|
577 } |
|
578 } |
|
579 |
|
580 if(state == MIME_TYPE) { |
|
581 mhdr = mime_hdr_new(ntmp, strip_ends(q)); |
|
582 sk_MIME_HEADER_push(headers, mhdr); |
|
583 } else if(state == MIME_VALUE) |
|
584 mime_hdr_addparam(mhdr, ntmp, strip_ends(q)); |
|
585 if(p == linebuf) break; /* Blank line means end of headers */ |
|
586 } |
|
587 |
|
588 return headers; |
|
589 |
|
590 } |
|
591 |
|
592 static char *strip_ends(char *name) |
|
593 { |
|
594 return strip_end(strip_start(name)); |
|
595 } |
|
596 |
|
597 /* Strip a parameter of whitespace from start of param */ |
|
598 static char *strip_start(char *name) |
|
599 { |
|
600 char *p, c; |
|
601 /* Look for first non white space or quote */ |
|
602 for(p = name; (c = *p) ;p++) { |
|
603 if(c == '"') { |
|
604 /* Next char is start of string if non null */ |
|
605 if(p[1]) return p + 1; |
|
606 /* Else null string */ |
|
607 return NULL; |
|
608 } |
|
609 if(!isspace((unsigned char)c)) return p; |
|
610 } |
|
611 return NULL; |
|
612 } |
|
613 |
|
614 /* As above but strip from end of string : maybe should handle brackets? */ |
|
615 static char *strip_end(char *name) |
|
616 { |
|
617 char *p, c; |
|
618 if(!name) return NULL; |
|
619 /* Look for first non white space or quote */ |
|
620 for(p = name + strlen(name) - 1; p >= name ;p--) { |
|
621 c = *p; |
|
622 if(c == '"') { |
|
623 if(p - 1 == name) return NULL; |
|
624 *p = 0; |
|
625 return name; |
|
626 } |
|
627 if(isspace((unsigned char)c)) *p = 0; |
|
628 else return name; |
|
629 } |
|
630 return NULL; |
|
631 } |
|
632 |
|
633 static MIME_HEADER *mime_hdr_new(char *name, char *value) |
|
634 { |
|
635 MIME_HEADER *mhdr; |
|
636 char *tmpname, *tmpval, *p; |
|
637 int c; |
|
638 if(name) { |
|
639 if(!(tmpname = BUF_strdup(name))) return NULL; |
|
640 for(p = tmpname ; *p; p++) { |
|
641 c = *p; |
|
642 if(isupper(c)) { |
|
643 c = tolower(c); |
|
644 *p = c; |
|
645 } |
|
646 } |
|
647 } else tmpname = NULL; |
|
648 if(value) { |
|
649 if(!(tmpval = BUF_strdup(value))) return NULL; |
|
650 for(p = tmpval ; *p; p++) { |
|
651 c = *p; |
|
652 if(isupper(c)) { |
|
653 c = tolower(c); |
|
654 *p = c; |
|
655 } |
|
656 } |
|
657 } else tmpval = NULL; |
|
658 mhdr = (MIME_HEADER *) OPENSSL_malloc(sizeof(MIME_HEADER)); |
|
659 if(!mhdr) return NULL; |
|
660 mhdr->name = tmpname; |
|
661 mhdr->value = tmpval; |
|
662 if(!(mhdr->params = sk_MIME_PARAM_new(mime_param_cmp))) return NULL; |
|
663 return mhdr; |
|
664 } |
|
665 |
|
666 static int mime_hdr_addparam(MIME_HEADER *mhdr, char *name, char *value) |
|
667 { |
|
668 char *tmpname, *tmpval, *p; |
|
669 int c; |
|
670 MIME_PARAM *mparam; |
|
671 if(name) { |
|
672 tmpname = BUF_strdup(name); |
|
673 if(!tmpname) return 0; |
|
674 for(p = tmpname ; *p; p++) { |
|
675 c = *p; |
|
676 if(isupper(c)) { |
|
677 c = tolower(c); |
|
678 *p = c; |
|
679 } |
|
680 } |
|
681 } else tmpname = NULL; |
|
682 if(value) { |
|
683 tmpval = BUF_strdup(value); |
|
684 if(!tmpval) return 0; |
|
685 } else tmpval = NULL; |
|
686 /* Parameter values are case sensitive so leave as is */ |
|
687 mparam = (MIME_PARAM *) OPENSSL_malloc(sizeof(MIME_PARAM)); |
|
688 if(!mparam) return 0; |
|
689 mparam->param_name = tmpname; |
|
690 mparam->param_value = tmpval; |
|
691 sk_MIME_PARAM_push(mhdr->params, mparam); |
|
692 return 1; |
|
693 } |
|
694 |
|
695 static int mime_hdr_cmp(const MIME_HEADER * const *a, |
|
696 const MIME_HEADER * const *b) |
|
697 { |
|
698 return(strcmp((*a)->name, (*b)->name)); |
|
699 } |
|
700 |
|
701 static int mime_param_cmp(const MIME_PARAM * const *a, |
|
702 const MIME_PARAM * const *b) |
|
703 { |
|
704 return(strcmp((*a)->param_name, (*b)->param_name)); |
|
705 } |
|
706 |
|
707 /* Find a header with a given name (if possible) */ |
|
708 |
|
709 static MIME_HEADER *mime_hdr_find(STACK_OF(MIME_HEADER) *hdrs, char *name) |
|
710 { |
|
711 MIME_HEADER htmp; |
|
712 int idx; |
|
713 htmp.name = name; |
|
714 idx = sk_MIME_HEADER_find(hdrs, &htmp); |
|
715 if(idx < 0) return NULL; |
|
716 return sk_MIME_HEADER_value(hdrs, idx); |
|
717 } |
|
718 |
|
719 static MIME_PARAM *mime_param_find(MIME_HEADER *hdr, char *name) |
|
720 { |
|
721 MIME_PARAM param; |
|
722 int idx; |
|
723 param.param_name = name; |
|
724 idx = sk_MIME_PARAM_find(hdr->params, ¶m); |
|
725 if(idx < 0) return NULL; |
|
726 return sk_MIME_PARAM_value(hdr->params, idx); |
|
727 } |
|
728 |
|
729 static void mime_hdr_free(MIME_HEADER *hdr) |
|
730 { |
|
731 if(hdr->name) OPENSSL_free(hdr->name); |
|
732 if(hdr->value) OPENSSL_free(hdr->value); |
|
733 if(hdr->params) sk_MIME_PARAM_pop_free(hdr->params, mime_param_free); |
|
734 OPENSSL_free(hdr); |
|
735 } |
|
736 |
|
737 static void mime_param_free(MIME_PARAM *param) |
|
738 { |
|
739 if(param->param_name) OPENSSL_free(param->param_name); |
|
740 if(param->param_value) OPENSSL_free(param->param_value); |
|
741 OPENSSL_free(param); |
|
742 } |
|
743 |
|
744 /* Check for a multipart boundary. Returns: |
|
745 * 0 : no boundary |
|
746 * 1 : part boundary |
|
747 * 2 : final boundary |
|
748 */ |
|
749 static int mime_bound_check(char *line, int linelen, char *bound, int blen) |
|
750 { |
|
751 if(linelen == -1) linelen = strlen(line); |
|
752 if(blen == -1) blen = strlen(bound); |
|
753 /* Quickly eliminate if line length too short */ |
|
754 if(blen + 2 > linelen) return 0; |
|
755 /* Check for part boundary */ |
|
756 if(!strncmp(line, "--", 2) && !strncmp(line + 2, bound, blen)) { |
|
757 if(!strncmp(line + blen + 2, "--", 2)) return 2; |
|
758 else return 1; |
|
759 } |
|
760 return 0; |
|
761 } |
|
762 |
|
763 static int strip_eol(char *linebuf, int *plen) |
|
764 { |
|
765 int len = *plen; |
|
766 char *p, c; |
|
767 int is_eol = 0; |
|
768 p = linebuf + len - 1; |
|
769 for (p = linebuf + len - 1; len > 0; len--, p--) |
|
770 { |
|
771 c = *p; |
|
772 if (c == '\n') |
|
773 is_eol = 1; |
|
774 else if (c != '\r') |
|
775 break; |
|
776 } |
|
777 *plen = len; |
|
778 return is_eol; |
|
779 } |