Mercurial > dropbear

annotate libtomcrypt/src/pk/rsa/rsa_import_x509.c @ 1857:6022df862942

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Use DSCP for IP QoS traffic classes The previous TOS values are deprecated and not used by modern traffic classifiers. This sets AF21 for "interactive" traffic (with a tty). Non-tty traffic sets AF11 - that indicates high throughput but is not lowest priority (which would be CS1 or LE). This differs from the CS1 used by OpenSSH, it lets interactive git over SSH have higher priority than background least effort traffic. Dropbear's settings here should be suitable with the diffservs used by CAKE qdisc.
author Matt Johnston <matt@ucc.asn.au>
date Tue, 25 Jan 2022 17:32:20 +0800
parents 6dba84798cd5
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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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 rsa_import.c
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13 Import an RSA key from a X.509 certificate, Steffen Jaeckel
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14 */
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15
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16 #ifdef LTC_MRSA
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17
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18 /**
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19 Import an RSA key from a X.509 certificate
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20 @param in The packet to import from
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21 @param inlen It's length (octets)
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22 @param key [out] Destination for newly imported key
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23 @return CRYPT_OK if successful, upon error allocated memory is freed
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24 */
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25 int rsa_import_x509(const unsigned char *in, unsigned long inlen, rsa_key *key)
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26 {
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27 int err;
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28 unsigned char *tmpbuf;
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29 unsigned long tmpbuf_len, tmp_inlen;
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30 ltc_asn1_list *decoded_list = NULL, *l;
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31
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32 LTC_ARGCHK(in != NULL);
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33 LTC_ARGCHK(key != NULL);
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34 LTC_ARGCHK(ltc_mp.name != NULL);
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35
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36 /* init key */
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37 if ((err = mp_init_multi(&key->e, &key->d, &key->N, &key->dQ,
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38 &key->dP, &key->qP, &key->p, &key->q, NULL)) != CRYPT_OK) {
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39 return err;
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40 }
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41
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42 tmpbuf_len = inlen;
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43 tmpbuf = XCALLOC(1, tmpbuf_len);
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44 if (tmpbuf == NULL) {
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45 err = CRYPT_MEM;
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46 goto LBL_ERR;
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47 }
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48
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49 tmp_inlen = inlen;
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50 if ((err = der_decode_sequence_flexi(in, &tmp_inlen, &decoded_list)) == CRYPT_OK) {
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51 l = decoded_list;
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52 /* Move 2 levels up in the tree
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53 SEQUENCE
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54 SEQUENCE
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55 ...
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56 */
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57 if (l->type == LTC_ASN1_SEQUENCE && l->child) {
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58 l = l->child;
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59 if (l->type == LTC_ASN1_SEQUENCE && l->child) {
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60 l = l->child;
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61
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62 err = CRYPT_ERROR;
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63
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64 /* Move forward in the tree until we find this combination
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65 ...
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66 SEQUENCE
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67 SEQUENCE
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68 OBJECT IDENTIFIER 1.2.840.113549.1.1.1
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69 NULL
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70 BIT STRING
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71 */
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72 do {
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73 /* The additional check for l->data is there to make sure
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74 * we won't try to decode a list that has been 'shrunk'
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75 */
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76 if (l->type == LTC_ASN1_SEQUENCE && l->data && l->child &&
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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77 l->child->type == LTC_ASN1_SEQUENCE && l->child->child &&
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78 l->child->child->type == LTC_ASN1_OBJECT_IDENTIFIER && l->child->next &&
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79 l->child->next->type == LTC_ASN1_BIT_STRING) {
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80 err = der_decode_subject_public_key_info(l->data, l->size,
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81 PKA_RSA, tmpbuf, &tmpbuf_len,
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82 LTC_ASN1_NULL, NULL, 0);
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83 if (err == CRYPT_OK) {
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84 /* now it should be SEQUENCE { INTEGER, INTEGER } */
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85 if ((err = der_decode_sequence_multi(tmpbuf, tmpbuf_len,
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86 LTC_ASN1_INTEGER, 1UL, key->N,
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87 LTC_ASN1_INTEGER, 1UL, key->e,
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88 LTC_ASN1_EOL, 0UL, NULL)) != CRYPT_OK) {
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89 goto LBL_ERR;
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90 }
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91 key->type = PK_PUBLIC;
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92 err = CRYPT_OK;
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93 goto LBL_FREE;
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94 }
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95 }
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96 l = l->next;
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97 } while(l);
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98 }
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99 }
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100 }
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101
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102
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103 LBL_ERR:
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104 rsa_free(key);
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105
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106 LBL_FREE:
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107 if (decoded_list) der_free_sequence_flexi(decoded_list);
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108 if (tmpbuf != NULL) XFREE(tmpbuf);
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109
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110 return err;
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111 }
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112
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113 #endif /* LTC_MRSA */
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114
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115
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116 /* ref: $Format:%D$ */
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117 /* git commit: $Format:%H$ */
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118 /* commit time: $Format:%ai$ */