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annotate libtomcrypt/src/pk/rsa/rsa_import_x509.c @ 1659:d32bcb5c557d

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Add Ed25519 support (#91) * Add support for Ed25519 as a public key type Ed25519 is a elliptic curve signature scheme that offers better security than ECDSA and DSA and good performance. It may be used for both user and host keys. OpenSSH key import and fuzzer are not supported yet. Initially inspired by Peter Szabo. * Add curve25519 and ed25519 fuzzers * Add import and export of Ed25519 keys
author Vladislav Grishenko <themiron@users.noreply.github.com>
date Wed, 11 Mar 2020 21:09:45 +0500
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 &&
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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: $Format:%ai$ */