Mercurial > dropbear
annotate libtomcrypt/src/pk/rsa/rsa_import_pkcs8.c @ 1792:2bf1e97ba3cd
Update INSTALL (#113)
Make Git/Mercurial instructions easier to understand
author | Xenhat <commits@xenh.at> |
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date | Thu, 17 Dec 2020 04:35:48 -0500 |
parents | e9dba7abd939 |
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rev | line source |
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1471
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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_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 |
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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 */ |
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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); |
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83 if (err != CRYPT_OK) { goto LBL_FREE2; } |
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84 |
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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); |
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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); |
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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); |
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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; |
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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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114 |
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115 /* check alg oid */ |
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116 if ((alg_seq[0].size != rsaoid.OIDlen) || |
1711 | 117 XMEMCMP(rsaoid.OID, alg_seq[0].data, rsaoid.OIDlen * sizeof(rsaoid.OID[0])) != 0) { |
1471
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118 err = CRYPT_PK_INVALID_TYPE; |
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119 goto LBL_ERR; |
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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: $Format:%ai$ */ |