Mercurial > dropbear

annotate libtomcrypt/src/pk/asn1/der/printable_string/der_encode_printable_string.c @ 1810:1b160ed94749

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fuzz: don't push wrapfd descriptors larger than needed
author Matt Johnston <matt@ucc.asn.au>
date Mon, 08 Mar 2021 21:59:10 +0800
parents 6dba84798cd5
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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_printable_string.c
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13 ASN.1 DER, encode a 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 /**
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19 Store an printable STRING
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20 @param in The array of printable to store (one per char)
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21 @param inlen The number of printable to store
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22 @param out [out] The destination for the DER encoded printable STRING
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23 @param outlen [in/out] The max size and resulting size of the DER printable STRING
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24 @return CRYPT_OK if successful
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25 */
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26 int der_encode_printable_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_printable_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++] = 0x13;
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50 if (inlen < 128) {
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51 out[x++] = (unsigned char)inlen;
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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);
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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_printable_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: $Format:%ai$ */