Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/lib/vauth/cram.c @ 17:dd9cdb856310

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Remove PKG-INFO from the because it is regenerated automatically for the sdist
author Franz Glasner <fzglas.hg@dom66.de>
date Thu, 18 Sep 2025 17:40:40 +0200
parents b50eed0cc0ef
children
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1 /***************************************************************************
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2 * _ _ ____ _
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3 * Project ___| | | | _ \| |
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4 * / __| | | | |_) | |
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5 * | (__| |_| | _ <| |___
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6 * \___|\___/|_| \_\_____|
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7 *
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8 * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
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9 *
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10 * This software is licensed as described in the file COPYING, which
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11 * you should have received as part of this distribution. The terms
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12 * are also available at https://curl.haxx.se/docs/copyright.html.
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13 *
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14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 * copies of the Software, and permit persons to whom the Software is
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16 * furnished to do so, under the terms of the COPYING file.
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17 *
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18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 * KIND, either express or implied.
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20 *
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21 * RFC2195 CRAM-MD5 authentication
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22 *
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23 ***************************************************************************/
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25 #include "curl_setup.h"
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27 #if !defined(CURL_DISABLE_CRYPTO_AUTH)
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29 #include <curl/curl.h>
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30 #include "urldata.h"
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32 #include "vauth/vauth.h"
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33 #include "curl_base64.h"
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34 #include "curl_hmac.h"
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35 #include "curl_md5.h"
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36 #include "warnless.h"
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37 #include "curl_printf.h"
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39 /* The last #include files should be: */
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40 #include "curl_memory.h"
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41 #include "memdebug.h"
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43 /*
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44 * Curl_auth_decode_cram_md5_message()
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45 *
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46 * This is used to decode an already encoded CRAM-MD5 challenge message.
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47 *
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48 * Parameters:
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49 *
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50 * chlg64 [in] - The base64 encoded challenge message.
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51 * outptr [in/out] - The address where a pointer to newly allocated memory
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52 * holding the result will be stored upon completion.
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53 * outlen [out] - The length of the output message.
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54 *
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55 * Returns CURLE_OK on success.
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56 */
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57 CURLcode Curl_auth_decode_cram_md5_message(const char *chlg64, char **outptr,
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58 size_t *outlen)
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59 {
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60 CURLcode result = CURLE_OK;
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61 size_t chlg64len = strlen(chlg64);
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62
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63 *outptr = NULL;
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64 *outlen = 0;
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65
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66 /* Decode the challenge if necessary */
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67 if(chlg64len && *chlg64 != '=')
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68 result = Curl_base64_decode(chlg64, (unsigned char **) outptr, outlen);
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69
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70 return result;
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71 }
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72
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73 /*
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74 * Curl_auth_create_cram_md5_message()
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75 *
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76 * This is used to generate an already encoded CRAM-MD5 response message ready
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77 * for sending to the recipient.
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78 *
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79 * Parameters:
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80 *
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81 * data [in] - The session handle.
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82 * chlg [in] - The challenge.
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83 * userp [in] - The user name.
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84 * passwdp [in] - The user's password.
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85 * outptr [in/out] - The address where a pointer to newly allocated memory
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86 * holding the result will be stored upon completion.
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87 * outlen [out] - The length of the output message.
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88 *
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89 * Returns CURLE_OK on success.
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90 */
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91 CURLcode Curl_auth_create_cram_md5_message(struct Curl_easy *data,
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92 const char *chlg,
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93 const char *userp,
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94 const char *passwdp,
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95 char **outptr, size_t *outlen)
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96 {
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97 CURLcode result = CURLE_OK;
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98 size_t chlglen = 0;
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99 HMAC_context *ctxt;
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100 unsigned char digest[MD5_DIGEST_LEN];
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101 char *response;
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102
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103 if(chlg)
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104 chlglen = strlen(chlg);
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105
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106 /* Compute the digest using the password as the key */
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107 ctxt = Curl_HMAC_init(Curl_HMAC_MD5,
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108 (const unsigned char *) passwdp,
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109 curlx_uztoui(strlen(passwdp)));
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110 if(!ctxt)
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111 return CURLE_OUT_OF_MEMORY;
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112
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113 /* Update the digest with the given challenge */
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114 if(chlglen > 0)
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115 Curl_HMAC_update(ctxt, (const unsigned char *) chlg,
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116 curlx_uztoui(chlglen));
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117
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118 /* Finalise the digest */
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119 Curl_HMAC_final(ctxt, digest);
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120
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121 /* Generate the response */
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122 response = aprintf(
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123 "%s %02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
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124 userp, digest[0], digest[1], digest[2], digest[3], digest[4],
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125 digest[5], digest[6], digest[7], digest[8], digest[9], digest[10],
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126 digest[11], digest[12], digest[13], digest[14], digest[15]);
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127 if(!response)
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128 return CURLE_OUT_OF_MEMORY;
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129
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130 /* Base64 encode the response */
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131 result = Curl_base64_encode(data, response, 0, outptr, outlen);
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132
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133 free(response);
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134
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135 return result;
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136 }
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137
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138 #endif /* !CURL_DISABLE_CRYPTO_AUTH */