Mercurial > dropbear

annotate libtomcrypt/src/pk/asn1/der/printable_string/der_length_printable_string.c @ 1831:0a3d02c66bf6

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Comment on reason for DROPBEAR_MAX_PASSWORD_LEN limit
author Matt Johnston <matt@codeconstruct.com.au>
date Tue, 12 Oct 2021 21:29:25 +0800
parents 6dba84798cd5
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis
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2 *
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3 * LibTomCrypt is a library that provides various cryptographic
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4 * algorithms in a highly modular and flexible manner.
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5 *
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6 * The library is free for all purposes without any express
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7 * guarantee it works.
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8 */
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9 #include "tomcrypt.h"
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10
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11 /**
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12 @file der_length_printable_string.c
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13 ASN.1 DER, get length of Printable STRING, Tom St Denis
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14 */
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16 #ifdef LTC_DER
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17
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18 static const struct {
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19 int code, value;
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20 } printable_table[] = {
1471
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21 { ' ', 32 },
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22 { '\'', 39 },
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23 { '(', 40 },
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24 { ')', 41 },
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25 { '+', 43 },
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26 { ',', 44 },
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27 { '-', 45 },
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28 { '.', 46 },
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29 { '/', 47 },
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30 { '0', 48 },
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31 { '1', 49 },
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32 { '2', 50 },
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33 { '3', 51 },
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34 { '4', 52 },
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35 { '5', 53 },
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36 { '6', 54 },
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37 { '7', 55 },
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38 { '8', 56 },
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39 { '9', 57 },
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40 { ':', 58 },
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41 { '=', 61 },
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42 { '?', 63 },
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43 { 'A', 65 },
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44 { 'B', 66 },
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45 { 'C', 67 },
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46 { 'D', 68 },
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47 { 'E', 69 },
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48 { 'F', 70 },
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49 { 'G', 71 },
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50 { 'H', 72 },
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51 { 'I', 73 },
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52 { 'J', 74 },
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53 { 'K', 75 },
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54 { 'L', 76 },
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55 { 'M', 77 },
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56 { 'N', 78 },
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57 { 'O', 79 },
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58 { 'P', 80 },
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59 { 'Q', 81 },
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60 { 'R', 82 },
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61 { 'S', 83 },
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62 { 'T', 84 },
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63 { 'U', 85 },
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64 { 'V', 86 },
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65 { 'W', 87 },
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66 { 'X', 88 },
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67 { 'Y', 89 },
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68 { 'Z', 90 },
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69 { 'a', 97 },
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70 { 'b', 98 },
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71 { 'c', 99 },
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72 { 'd', 100 },
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73 { 'e', 101 },
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74 { 'f', 102 },
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75 { 'g', 103 },
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76 { 'h', 104 },
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77 { 'i', 105 },
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78 { 'j', 106 },
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79 { 'k', 107 },
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80 { 'l', 108 },
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81 { 'm', 109 },
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82 { 'n', 110 },
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83 { 'o', 111 },
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84 { 'p', 112 },
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85 { 'q', 113 },
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86 { 'r', 114 },
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87 { 's', 115 },
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88 { 't', 116 },
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89 { 'u', 117 },
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90 { 'v', 118 },
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91 { 'w', 119 },
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92 { 'x', 120 },
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93 { 'y', 121 },
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94 { 'z', 122 },
285
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95 };
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96
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97 int der_printable_char_encode(int c)
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98 {
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99 int x;
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100 for (x = 0; x < (int)(sizeof(printable_table)/sizeof(printable_table[0])); x++) {
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101 if (printable_table[x].code == c) {
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102 return printable_table[x].value;
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103 }
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104 }
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105 return -1;
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106 }
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107
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108 int der_printable_value_decode(int v)
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109 {
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110 int x;
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111 for (x = 0; x < (int)(sizeof(printable_table)/sizeof(printable_table[0])); x++) {
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112 if (printable_table[x].value == v) {
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113 return printable_table[x].code;
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114 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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115 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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116 return -1;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
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117 }
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118
285
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
119 /**
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120 Gets length of DER encoding of Printable STRING
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121 @param octets The values you want to encode
285
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
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122 @param noctets The number of octets in the string to encode
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
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123 @param outlen [out] The length of the DER encoding for the given string
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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124 @return CRYPT_OK if successful
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
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125 */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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diff changeset
126 int der_length_printable_string(const unsigned char *octets, unsigned long noctets, unsigned long *outlen)
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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127 {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
128 unsigned long x;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
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129
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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130 LTC_ARGCHK(outlen != NULL);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
131 LTC_ARGCHK(octets != NULL);
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
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132
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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133 /* scan string for validity */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
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134 for (x = 0; x < noctets; x++) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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135 if (der_printable_char_encode(octets[x]) == -1) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
136 return CRYPT_INVALID_ARG;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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137 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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138 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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139
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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140 if (noctets < 128) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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diff changeset
141 /* 16 LL DD DD DD ... */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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142 *outlen = 2 + noctets;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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143 } else if (noctets < 256) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
144 /* 16 81 LL DD DD DD ... */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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diff changeset
145 *outlen = 3 + noctets;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
146 } else if (noctets < 65536UL) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
147 /* 16 82 LL LL DD DD DD ... */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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148 *outlen = 4 + noctets;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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149 } else if (noctets < 16777216UL) {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
150 /* 16 83 LL LL LL DD DD DD ... */
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
151 *outlen = 5 + noctets;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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diff changeset
152 } else {
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
153 return CRYPT_INVALID_ARG;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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154 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
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155
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
156 return CRYPT_OK;
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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157 }
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
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158
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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diff changeset
159 #endif
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
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160
1b9e69c058d2 propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
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161
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diff changeset
162 /* ref: $Format:%D$ */
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diff changeset
163 /* git commit: $Format:%H$ */
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164 /* commit time: $Format:%ai$ */