Mercurial > dropbear
annotate libtomcrypt/src/pk/asn1/der/utf8/der_encode_utf8_string.c @ 1672:3a97f14c0235
Add Chacha20-Poly1305, AES128-GCM and AES256-GCM support (#93)
* Add Chacha20-Poly1305 authenticated encryption
* Add general AEAD approach.
* Add [email protected] algo using LibTomCrypt chacha and
poly1305 routines.
Chacha20-Poly1305 is generally faster than AES256 on CPU w/o dedicated
AES instructions, having the same key size.
Compiling in will add ~5,5kB to binary size on x86-64.
function old new delta
chacha_crypt - 1397 +1397
_poly1305_block - 608 +608
poly1305_done - 595 +595
dropbear_chachapoly_crypt - 457 +457
.rodata 26976 27392 +416
poly1305_process - 290 +290
poly1305_init - 221 +221
chacha_setup - 218 +218
encrypt_packet 1068 1270 +202
dropbear_chachapoly_getlength - 147 +147
decrypt_packet 756 897 +141
chacha_ivctr64 - 137 +137
read_packet 543 637 +94
dropbear_chachapoly_start - 94 +94
read_kex_algos 792 880 +88
chacha_keystream - 69 +69
dropbear_mode_chachapoly - 48 +48
sshciphers 280 320 +40
dropbear_mode_none 24 48 +24
dropbear_mode_ctr 24 48 +24
dropbear_mode_cbc 24 48 +24
dropbear_chachapoly_mac - 24 +24
dropbear_chachapoly - 24 +24
gen_new_keys 848 854 +6
------------------------------------------------------------------------------
(add/remove: 14/0 grow/shrink: 10/0 up/down: 5388/0) Total: 5388 bytes
* Add AES128-GCM and AES256-GCM authenticated encryption
* Add general AES-GCM mode.
* Add [email protected] and [email protected] algo using
LibTomCrypt gcm routines.
AES-GCM is combination of AES CTR mode and GHASH, slower than AES-CTR on
CPU w/o dedicated AES/GHASH instructions therefore disabled by default.
Compiling in will add ~6kB to binary size on x86-64.
function old new delta
gcm_process - 1060 +1060
.rodata 26976 27808 +832
gcm_gf_mult - 820 +820
gcm_add_aad - 660 +660
gcm_shift_table - 512 +512
gcm_done - 471 +471
gcm_add_iv - 384 +384
gcm_init - 347 +347
dropbear_gcm_crypt - 309 +309
encrypt_packet 1068 1270 +202
decrypt_packet 756 897 +141
gcm_reset - 118 +118
read_packet 543 637 +94
read_kex_algos 792 880 +88
sshciphers 280 360 +80
gcm_mult_h - 80 +80
dropbear_gcm_start - 62 +62
dropbear_mode_gcm - 48 +48
dropbear_mode_none 24 48 +24
dropbear_mode_ctr 24 48 +24
dropbear_mode_cbc 24 48 +24
dropbear_ghash - 24 +24
dropbear_gcm_getlength - 24 +24
gen_new_keys 848 854 +6
------------------------------------------------------------------------------
(add/remove: 14/0 grow/shrink: 10/0 up/down: 6434/0) Total: 6434 bytes
author | Vladislav Grishenko <themiron@users.noreply.github.com> |
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date | Mon, 25 May 2020 20:50:25 +0500 |
parents | 6dba84798cd5 |
children |
rev | line source |
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382
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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_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++) { |
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38 if (!der_utf8_valid_char(in[x])) return CRYPT_INVALID_ARG; |
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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) { |
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56 *outlen = y; |
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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) { |
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64 out[x++] = (unsigned char)len; |
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65 } else if (len < 256) { |
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66 out[x++] = 0x81; |
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67 out[x++] = (unsigned char)len; |
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68 } else if (len < 65536UL) { |
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69 out[x++] = 0x82; |
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70 out[x++] = (unsigned char)((len>>8)&255); |
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71 out[x++] = (unsigned char)(len&255); |
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72 } else if (len < 16777216UL) { |
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73 out[x++] = 0x83; |
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74 out[x++] = (unsigned char)((len>>16)&255); |
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75 out[x++] = (unsigned char)((len>>8)&255); |
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76 out[x++] = (unsigned char)(len&255); |
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77 } else { |
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78 /* coverity[dead_error_line] */ |
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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])) { |
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85 case 1: out[x++] = (unsigned char)in[y]; break; |
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86 case 2: out[x++] = 0xC0 | ((in[y] >> 6) & 0x1F); out[x++] = 0x80 | (in[y] & 0x3F); break; |
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87 case 3: out[x++] = 0xE0 | ((in[y] >> 12) & 0x0F); out[x++] = 0x80 | ((in[y] >> 6) & 0x3F); out[x++] = 0x80 | (in[y] & 0x3F); break; |
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88 #if !defined(LTC_WCHAR_MAX) || LTC_WCHAR_MAX > 0xFFFF |
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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; |
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90 #endif |
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91 } |
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92 } |
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93 |
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94 /* retun length */ |
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95 *outlen = x; |
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96 |
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97 return CRYPT_OK; |
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98 } |
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99 |
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100 #endif |
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101 |
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102 /* ref: $Format:%D$ */ |
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103 /* git commit: $Format:%H$ */ |
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104 /* commit time: $Format:%ai$ */ |