Mercurial > dropbear

annotate libtomcrypt/src/pk/asn1/der/utf8/der_encode_utf8_string.c @ 1629:258b57b208ae

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Fix for issue successfull login of disabled user (#78) This commit introduces fix for scenario: 1. Root login disabled on dropbear 2. PAM authentication model enabled While login as root user, after prompt for password user is being notified about login failrue, but after second attempt of prompt for password within same session, login becames succesfull. Signed-off-by: Pawel Rapkiewicz <[email protected]>
author vincentto13 <33652988+vincentto13@users.noreply.github.com>
date Wed, 20 Mar 2019 15:03:40 +0100
parents 6dba84798cd5
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
382
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diff changeset
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_encode_utf8_string.c
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13 ASN.1 DER, encode a UTF8 STRING, Tom St Denis
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14 */
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15
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16
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17 #ifdef LTC_DER
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18
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19 /**
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20 Store an UTF8 STRING
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21 @param in The array of UTF8 to store (one per wchar_t)
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22 @param inlen The number of UTF8 to store
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23 @param out [out] The destination for the DER encoded UTF8 STRING
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24 @param outlen [in/out] The max size and resulting size of the DER UTF8 STRING
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25 @return CRYPT_OK if successful
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26 */
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27 int der_encode_utf8_string(const wchar_t *in, unsigned long inlen,
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28 unsigned char *out, unsigned long *outlen)
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29 {
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30 unsigned long x, y, len;
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31
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32 LTC_ARGCHK(in != NULL);
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33 LTC_ARGCHK(out != NULL);
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34 LTC_ARGCHK(outlen != NULL);
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35
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36 /* get the size */
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37 for (x = len = 0; x < inlen; x++) {
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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38 if (!der_utf8_valid_char(in[x])) return CRYPT_INVALID_ARG;
382
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39 len += der_utf8_charsize(in[x]);
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40 }
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41
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42 if (len < 128) {
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43 y = 2 + len;
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44 } else if (len < 256) {
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45 y = 3 + len;
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46 } else if (len < 65536UL) {
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47 y = 4 + len;
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48 } else if (len < 16777216UL) {
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49 y = 5 + len;
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50 } else {
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51 return CRYPT_INVALID_ARG;
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52 }
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53
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54 /* too big? */
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55 if (y > *outlen) {
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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56 *outlen = y;
382
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57 return CRYPT_BUFFER_OVERFLOW;
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58 }
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59
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60 /* encode the header+len */
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61 x = 0;
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62 out[x++] = 0x0C;
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63 if (len < 128) {
1435
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
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64 out[x++] = (unsigned char)len;
382
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65 } else if (len < 256) {
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66 out[x++] = 0x81;
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f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
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67 out[x++] = (unsigned char)len;
382
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68 } else if (len < 65536UL) {
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69 out[x++] = 0x82;
1435
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
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70 out[x++] = (unsigned char)((len>>8)&255);
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
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71 out[x++] = (unsigned char)(len&255);
382
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72 } else if (len < 16777216UL) {
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73 out[x++] = 0x83;
1435
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
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74 out[x++] = (unsigned char)((len>>16)&255);
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
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75 out[x++] = (unsigned char)((len>>8)&255);
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
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76 out[x++] = (unsigned char)(len&255);
382
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77 } else {
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents: 1435
diff changeset
78 /* coverity[dead_error_line] */
382
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79 return CRYPT_INVALID_ARG;
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80 }
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81
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82 /* store UTF8 */
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83 for (y = 0; y < inlen; y++) {
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84 switch (der_utf8_charsize(in[y])) {
1435
f849a5ca2efc update to libtomcrypt 1.17 (with Dropbear changes)
Matt Johnston <matt@ucc.asn.au>
parents: 382
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85 case 1: out[x++] = (unsigned char)in[y]; break;
382
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diff changeset
86 case 2: out[x++] = 0xC0 | ((in[y] >> 6) & 0x1F); out[x++] = 0x80 | (in[y] & 0x3F); break;
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diff changeset
87 case 3: out[x++] = 0xE0 | ((in[y] >> 12) & 0x0F); out[x++] = 0x80 | ((in[y] >> 6) & 0x3F); out[x++] = 0x80 | (in[y] & 0x3F); break;
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents: 1435
diff changeset
88 #if !defined(LTC_WCHAR_MAX) || LTC_WCHAR_MAX > 0xFFFF
382
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
89 case 4: out[x++] = 0xF0 | ((in[y] >> 18) & 0x07); out[x++] = 0x80 | ((in[y] >> 12) & 0x3F); out[x++] = 0x80 | ((in[y] >> 6) & 0x3F); out[x++] = 0x80 | (in[y] & 0x3F); break;
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents: 1435
diff changeset
90 #endif
382
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
91 }
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
92 }
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
93
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
94 /* retun length */
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
95 *outlen = x;
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
96
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
97 return CRYPT_OK;
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
98 }
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
99
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
100 #endif
0cbe8f6dbf9e propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
101
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents: 1435
diff changeset
102 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents: 1435
diff changeset
103 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents: 1435
diff changeset
104 /* commit time: $Format:%ai$ */