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annotate libtomcrypt/src/pk/rsa/rsa_set.c @ 1934:83b6a47759a8

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Add m_snprintf() that won't return negative
author Matt Johnston <matt@ucc.asn.au>
date Fri, 01 Apr 2022 12:10:48 +0800
parents 6dba84798cd5
children
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rev   line source
1471
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
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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 #ifdef LTC_MRSA
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13
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14 /**
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15 Import RSA key from raw numbers
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16
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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17 @param N RSA's N
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18 @param Nlen RSA's N's length
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19 @param e RSA's e
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20 @param elen RSA's e's length
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21 @param d RSA's d (only private key, NULL for public key)
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22 @param dlen RSA's d's length
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23 @param key [out] the destination for the imported key
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24 @return CRYPT_OK if successful
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25 */
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26 int rsa_set_key(const unsigned char *N, unsigned long Nlen,
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27 const unsigned char *e, unsigned long elen,
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28 const unsigned char *d, unsigned long dlen,
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29 rsa_key *key)
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30 {
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31 int err;
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32
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33 LTC_ARGCHK(key != NULL);
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34 LTC_ARGCHK(N != NULL);
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35 LTC_ARGCHK(e != NULL);
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36 LTC_ARGCHK(ltc_mp.name != NULL);
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37
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38 err = mp_init_multi(&key->e, &key->d, &key->N, &key->dQ, &key->dP, &key->qP, &key->p, &key->q, NULL);
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39 if (err != CRYPT_OK) return err;
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40
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41 if ((err = mp_read_unsigned_bin(key->N , (unsigned char *)N , Nlen)) != CRYPT_OK) { goto LBL_ERR; }
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42 if ((err = mp_read_unsigned_bin(key->e , (unsigned char *)e , elen)) != CRYPT_OK) { goto LBL_ERR; }
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43 if (d && dlen) {
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44 if ((err = mp_read_unsigned_bin(key->d , (unsigned char *)d , dlen)) != CRYPT_OK) { goto LBL_ERR; }
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45 key->type = PK_PRIVATE;
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46 }
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47 else {
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48 key->type = PK_PUBLIC;
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49 }
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50 return CRYPT_OK;
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51
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52 LBL_ERR:
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53 rsa_free(key);
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54 return err;
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55 }
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56
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57 /**
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58 Import factors of an RSA key from raw numbers
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59
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60 Only for private keys.
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61
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62 @param p RSA's p
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63 @param plen RSA's p's length
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64 @param q RSA's q
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65 @param qlen RSA's q's length
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66 @param key [out] the destination for the imported key
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67 @return CRYPT_OK if successful
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68 */
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69 int rsa_set_factors(const unsigned char *p, unsigned long plen,
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70 const unsigned char *q, unsigned long qlen,
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71 rsa_key *key)
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72 {
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73 int err;
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74
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75 LTC_ARGCHK(key != NULL);
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76 LTC_ARGCHK(p != NULL);
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77 LTC_ARGCHK(q != NULL);
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78 LTC_ARGCHK(ltc_mp.name != NULL);
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79
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80 if (key->type != PK_PRIVATE) return CRYPT_PK_TYPE_MISMATCH;
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81
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82 if ((err = mp_read_unsigned_bin(key->p , (unsigned char *)p , plen)) != CRYPT_OK) { goto LBL_ERR; }
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83 if ((err = mp_read_unsigned_bin(key->q , (unsigned char *)q , qlen)) != CRYPT_OK) { goto LBL_ERR; }
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84 return CRYPT_OK;
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85
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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86 LBL_ERR:
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87 rsa_free(key);
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88 return err;
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89 }
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90
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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91 /**
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92 Import CRT parameters of an RSA key from raw numbers
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93
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94 Only for private keys.
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95
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96 @param dP RSA's dP
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97 @param dPlen RSA's dP's length
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98 @param dQ RSA's dQ
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99 @param dQlen RSA's dQ's length
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100 @param qP RSA's qP
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101 @param qPlen RSA's qP's length
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102 @param key [out] the destination for the imported key
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103 @return CRYPT_OK if successful
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104 */
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105 int rsa_set_crt_params(const unsigned char *dP, unsigned long dPlen,
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106 const unsigned char *dQ, unsigned long dQlen,
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107 const unsigned char *qP, unsigned long qPlen,
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108 rsa_key *key)
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109 {
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110 int err;
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111
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112 LTC_ARGCHK(key != NULL);
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113 LTC_ARGCHK(dP != NULL);
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114 LTC_ARGCHK(dQ != NULL);
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115 LTC_ARGCHK(qP != NULL);
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116 LTC_ARGCHK(ltc_mp.name != NULL);
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117
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118 if (key->type != PK_PRIVATE) return CRYPT_PK_TYPE_MISMATCH;
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119
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120 if ((err = mp_read_unsigned_bin(key->dP, (unsigned char *)dP, dPlen)) != CRYPT_OK) { goto LBL_ERR; }
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121 if ((err = mp_read_unsigned_bin(key->dQ, (unsigned char *)dQ, dQlen)) != CRYPT_OK) { goto LBL_ERR; }
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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122 if ((err = mp_read_unsigned_bin(key->qP, (unsigned char *)qP, qPlen)) != CRYPT_OK) { goto LBL_ERR; }
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
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123 return CRYPT_OK;
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124
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125 LBL_ERR:
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126 rsa_free(key);
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127 return err;
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128 }
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129
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130 #endif /* LTC_MRSA */
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131
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132 /* ref: $Format:%D$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
133 /* git commit: $Format:%H$ */
6dba84798cd5 Update to libtomcrypt 1.18.1, merged with Dropbear changes
Matt Johnston <matt@ucc.asn.au>
parents:
diff changeset
134 /* commit time: $Format:%ai$ */