Mercurial > dropbear

annotate libtomcrypt/src/pk/asn1/der/ia5/der_encode_ia5_string.c @ 1861:2b3a8026a6ce

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Add re-exec for server This allows ASLR to re-randomize the address space for every connection, preventing some vulnerabilities from being exploitable by repeated probing. Overhead (memory and time) is yet to be confirmed. At present this is only enabled on Linux. Other BSD platforms with fexecve() would probably also work though have not been tested.
author Matt Johnston <matt@ucc.asn.au>
date Sun, 30 Jan 2022 10:14:56 +0800
parents 6dba84798cd5
children
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285
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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_encode_ia5_string.c
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13 ASN.1 DER, encode a IA5 STRING, Tom St Denis
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14 */
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15
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16 #ifdef LTC_DER
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17
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18 /**
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19 Store an IA5 STRING
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20 @param in The array of IA5 to store (one per char)
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21 @param inlen The number of IA5 to store
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22 @param out [out] The destination for the DER encoded IA5 STRING
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23 @param outlen [in/out] The max size and resulting size of the DER IA5 STRING
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24 @return CRYPT_OK if successful
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25 */
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26 int der_encode_ia5_string(const unsigned char *in, unsigned long inlen,
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27 unsigned char *out, unsigned long *outlen)
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28 {
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29 unsigned long x, y, len;
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30 int err;
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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 if ((err = der_length_ia5_string(in, inlen, &len)) != CRYPT_OK) {
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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38 return err;
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39 }
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40
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41 /* too big? */
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42 if (len > *outlen) {
382
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43 *outlen = len;
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44 return CRYPT_BUFFER_OVERFLOW;
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45 }
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46
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47 /* encode the header+len */
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48 x = 0;
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49 out[x++] = 0x16;
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50 if (inlen < 128) {
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51 out[x++] = (unsigned char)inlen;
285
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52 } else if (inlen < 256) {
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53 out[x++] = 0x81;
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54 out[x++] = (unsigned char)inlen;
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55 } else if (inlen < 65536UL) {
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56 out[x++] = 0x82;
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57 out[x++] = (unsigned char)((inlen>>8)&255);
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58 out[x++] = (unsigned char)(inlen&255);
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59 } else if (inlen < 16777216UL) {
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60 out[x++] = 0x83;
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61 out[x++] = (unsigned char)((inlen>>16)&255);
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62 out[x++] = (unsigned char)((inlen>>8)&255);
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63 out[x++] = (unsigned char)(inlen&255);
285
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64 } else {
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65 return CRYPT_INVALID_ARG;
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66 }
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67
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68 /* store octets */
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69 for (y = 0; y < inlen; y++) {
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70 out[x++] = der_ia5_char_encode(in[y]);
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71 }
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72
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73 /* retun length */
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74 *outlen = x;
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75
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76 return CRYPT_OK;
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77 }
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78
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79 #endif
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80
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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81 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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82 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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83 /* commit time: $Format:%ai$ */