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annotate libtomcrypt/src/pk/rsa/rsa_import_pkcs8.c @ 1633:592a18dac250

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Support servers without multiple user support (#76)
author Patrick Stewart <patstew@gmail.com>
date Wed, 20 Mar 2019 14:44:49 +0000
parents 6dba84798cd5
children e9dba7abd939
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rev   line source
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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diff changeset
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_pkcs8.c
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13 Import a PKCS RSA key
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14 */
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15
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16 #ifdef LTC_MRSA
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17
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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18 /* Public-Key Cryptography Standards (PKCS) #8:
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19 * Private-Key Information Syntax Specification Version 1.2
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20 * https://tools.ietf.org/html/rfc5208
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21 *
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22 * PrivateKeyInfo ::= SEQUENCE {
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23 * version Version,
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24 * privateKeyAlgorithm PrivateKeyAlgorithmIdentifier,
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25 * privateKey PrivateKey,
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26 * attributes [0] IMPLICIT Attributes OPTIONAL }
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27 * where:
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28 * - Version ::= INTEGER
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29 * - PrivateKeyAlgorithmIdentifier ::= AlgorithmIdentifier
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30 * - PrivateKey ::= OCTET STRING
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31 * - Attributes ::= SET OF Attribute
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32 *
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33 * EncryptedPrivateKeyInfo ::= SEQUENCE {
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34 * encryptionAlgorithm EncryptionAlgorithmIdentifier,
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35 * encryptedData EncryptedData }
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36 * where:
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37 * - EncryptionAlgorithmIdentifier ::= AlgorithmIdentifier
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38 * - EncryptedData ::= OCTET STRING
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39 */
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40
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41 /**
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42 Import an RSAPublicKey or RSAPrivateKey in PKCS#8 format
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43 @param in The packet to import from
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44 @param inlen It's length (octets)
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45 @param passwd The password for decrypting privkey (NOT SUPPORTED YET)
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46 @param passwdlen Password's length (octets)
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47 @param key [out] Destination for newly imported key
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48 @return CRYPT_OK if successful, upon error allocated memory is freed
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49 */
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50 int rsa_import_pkcs8(const unsigned char *in, unsigned long inlen,
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51 const void *passwd, unsigned long passwdlen,
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52 rsa_key *key)
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53 {
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54 int err;
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55 void *zero, *iter;
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56 unsigned char *buf1 = NULL, *buf2 = NULL;
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57 unsigned long buf1len, buf2len;
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58 unsigned long oid[16];
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59 oid_st rsaoid;
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60 ltc_asn1_list alg_seq[2], top_seq[3];
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61 ltc_asn1_list alg_seq_e[2], key_seq_e[2], top_seq_e[2];
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62 unsigned char *decrypted = NULL;
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63 unsigned long decryptedlen;
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64
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65 LTC_ARGCHK(in != NULL);
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66 LTC_ARGCHK(key != NULL);
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67 LTC_ARGCHK(ltc_mp.name != NULL);
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68
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69 /* get RSA alg oid */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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70 err = pk_get_oid(PKA_RSA, &rsaoid);
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71 if (err != CRYPT_OK) { goto LBL_NOFREE; }
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72
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73 /* alloc buffers */
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74 buf1len = inlen; /* approx. */
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75 buf1 = XMALLOC(buf1len);
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76 if (buf1 == NULL) { err = CRYPT_MEM; goto LBL_NOFREE; }
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77 buf2len = inlen; /* approx. */
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78 buf2 = XMALLOC(buf2len);
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79 if (buf2 == NULL) { err = CRYPT_MEM; goto LBL_FREE1; }
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80
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81 /* init key */
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82 err = mp_init_multi(&key->e, &key->d, &key->N, &key->dQ, &key->dP, &key->qP, &key->p, &key->q, &zero, &iter, NULL);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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83 if (err != CRYPT_OK) { goto LBL_FREE2; }
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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84
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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85 /* try to decode encrypted priv key */
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86 LTC_SET_ASN1(key_seq_e, 0, LTC_ASN1_OCTET_STRING, buf1, buf1len);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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87 LTC_SET_ASN1(key_seq_e, 1, LTC_ASN1_INTEGER, iter, 1UL);
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88 LTC_SET_ASN1(alg_seq_e, 0, LTC_ASN1_OBJECT_IDENTIFIER, oid, 16UL);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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89 LTC_SET_ASN1(alg_seq_e, 1, LTC_ASN1_SEQUENCE, key_seq_e, 2UL);
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90 LTC_SET_ASN1(top_seq_e, 0, LTC_ASN1_SEQUENCE, alg_seq_e, 2UL);
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91 LTC_SET_ASN1(top_seq_e, 1, LTC_ASN1_OCTET_STRING, buf2, buf2len);
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92 err=der_decode_sequence(in, inlen, top_seq_e, 2UL);
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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93 if (err == CRYPT_OK) {
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94 LTC_UNUSED_PARAM(passwd);
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95 LTC_UNUSED_PARAM(passwdlen);
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96 /* XXX: TODO encrypted pkcs8 not implemented yet */
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97 /* fprintf(stderr, "decrypt: iter=%ld salt.len=%ld encdata.len=%ld\n", mp_get_int(iter), key_seq_e[0].size, top_seq_e[1].size); */
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98 err = CRYPT_PK_INVALID_TYPE;
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99 goto LBL_ERR;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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100 }
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101 else {
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102 decrypted = (unsigned char *)in;
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103 decryptedlen = inlen;
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104 }
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105
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106 /* try to decode unencrypted priv key */
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107 LTC_SET_ASN1(alg_seq, 0, LTC_ASN1_OBJECT_IDENTIFIER, oid, 16UL);
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108 LTC_SET_ASN1(alg_seq, 1, LTC_ASN1_NULL, NULL, 0UL);
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109 LTC_SET_ASN1(top_seq, 0, LTC_ASN1_INTEGER, zero, 1UL);
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110 LTC_SET_ASN1(top_seq, 1, LTC_ASN1_SEQUENCE, alg_seq, 2UL);
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111 LTC_SET_ASN1(top_seq, 2, LTC_ASN1_OCTET_STRING, buf1, buf1len);
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112 err=der_decode_sequence(decrypted, decryptedlen, top_seq, 3UL);
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113 if (err != CRYPT_OK) { goto LBL_ERR; }
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diff changeset
114
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115 /* check alg oid */
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116 if ((alg_seq[0].size != rsaoid.OIDlen) ||
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117 XMEMCMP(rsaoid.OID, alg_seq[0].data, rsaoid.OIDlen * sizeof(rsaoid.OID[0]))) {
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118 err = CRYPT_PK_INVALID_TYPE;
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119 goto LBL_ERR;
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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120 }
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121
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122 err = der_decode_sequence_multi(buf1, top_seq[2].size,
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123 LTC_ASN1_INTEGER, 1UL, zero,
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124 LTC_ASN1_INTEGER, 1UL, key->N,
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125 LTC_ASN1_INTEGER, 1UL, key->e,
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126 LTC_ASN1_INTEGER, 1UL, key->d,
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127 LTC_ASN1_INTEGER, 1UL, key->p,
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128 LTC_ASN1_INTEGER, 1UL, key->q,
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129 LTC_ASN1_INTEGER, 1UL, key->dP,
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130 LTC_ASN1_INTEGER, 1UL, key->dQ,
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131 LTC_ASN1_INTEGER, 1UL, key->qP,
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132 LTC_ASN1_EOL, 0UL, NULL);
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133 if (err != CRYPT_OK) { goto LBL_ERR; }
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134 key->type = PK_PRIVATE;
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135 err = CRYPT_OK;
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136 goto LBL_FREE2;
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137
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138 LBL_ERR:
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139 rsa_free(key);
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140 LBL_FREE2:
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141 mp_clear_multi(iter, zero, NULL);
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142 XFREE(buf2);
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143 LBL_FREE1:
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144 XFREE(buf1);
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145 LBL_NOFREE:
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146 return err;
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147 }
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148
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149 #endif /* LTC_MRSA */
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150
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151 /* ref: $Format:%D$ */
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152 /* git commit: $Format:%H$ */
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153 /* commit time: $Format:%ai$ */