Mercurial > dropbear
annotate libtomcrypt/src/misc/pkcs5/pkcs_5_2.c @ 1137:40434003bd96
remove .hgtags from release
author | Matt Johnston <matt@ucc.asn.au> |
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date | Mon, 03 Aug 2015 21:05:42 +0800 |
parents | 0cbe8f6dbf9e |
children | f849a5ca2efc |
rev | line source |
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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 * Tom St Denis, [email protected], http://libtomcrypt.com |
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10 */ |
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11 #include <tomcrypt.h> |
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12 |
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13 /** |
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14 @file pkcs_5_2.c |
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15 PKCS #5, Algorithm #2, Tom St Denis |
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16 */ |
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17 #ifdef PKCS_5 |
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18 |
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19 /** |
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20 Execute PKCS #5 v2 |
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21 @param password The input password (or key) |
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22 @param password_len The length of the password (octets) |
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23 @param salt The salt (or nonce) |
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24 @param salt_len The length of the salt (octets) |
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25 @param iteration_count # of iterations desired for PKCS #5 v2 [read specs for more] |
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26 @param hash_idx The index of the hash desired |
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27 @param out [out] The destination for this algorithm |
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28 @param outlen [in/out] The max size and resulting size of the algorithm output |
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29 @return CRYPT_OK if successful |
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30 */ |
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31 int pkcs_5_alg2(const unsigned char *password, unsigned long password_len, |
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32 const unsigned char *salt, unsigned long salt_len, |
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33 int iteration_count, int hash_idx, |
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34 unsigned char *out, unsigned long *outlen) |
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35 { |
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36 int err, itts; |
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37 ulong32 blkno; |
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38 unsigned long stored, left, x, y; |
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39 unsigned char *buf[2]; |
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40 hmac_state *hmac; |
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41 |
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42 LTC_ARGCHK(password != NULL); |
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43 LTC_ARGCHK(salt != NULL); |
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44 LTC_ARGCHK(out != NULL); |
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45 LTC_ARGCHK(outlen != NULL); |
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46 |
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47 /* test hash IDX */ |
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48 if ((err = hash_is_valid(hash_idx)) != CRYPT_OK) { |
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49 return err; |
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50 } |
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51 |
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52 buf[0] = XMALLOC(MAXBLOCKSIZE * 2); |
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53 hmac = XMALLOC(sizeof(hmac_state)); |
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54 if (hmac == NULL || buf[0] == NULL) { |
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55 if (hmac != NULL) { |
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56 XFREE(hmac); |
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57 } |
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58 if (buf[0] != NULL) { |
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59 XFREE(buf[0]); |
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60 } |
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61 return CRYPT_MEM; |
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62 } |
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63 /* buf[1] points to the second block of MAXBLOCKSIZE bytes */ |
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64 buf[1] = buf[0] + MAXBLOCKSIZE; |
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65 |
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66 left = *outlen; |
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67 blkno = 1; |
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68 stored = 0; |
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69 while (left != 0) { |
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70 /* process block number blkno */ |
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71 zeromem(buf[0], MAXBLOCKSIZE*2); |
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72 |
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73 /* store current block number and increment for next pass */ |
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74 STORE32H(blkno, buf[1]); |
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75 ++blkno; |
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76 |
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77 /* get PRF(P, S||int(blkno)) */ |
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78 if ((err = hmac_init(hmac, hash_idx, password, password_len)) != CRYPT_OK) { |
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79 goto LBL_ERR; |
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80 } |
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81 if ((err = hmac_process(hmac, salt, salt_len)) != CRYPT_OK) { |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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82 goto LBL_ERR; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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83 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
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diff
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84 if ((err = hmac_process(hmac, buf[1], 4)) != CRYPT_OK) { |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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85 goto LBL_ERR; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
86 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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87 x = MAXBLOCKSIZE; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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88 if ((err = hmac_done(hmac, buf[0], &x)) != CRYPT_OK) { |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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89 goto LBL_ERR; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
90 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
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91 |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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92 /* now compute repeated and XOR it in buf[1] */ |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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93 XMEMCPY(buf[1], buf[0], x); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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94 for (itts = 1; itts < iteration_count; ++itts) { |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
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95 if ((err = hmac_memory(hash_idx, password, password_len, buf[0], x, buf[0], &x)) != CRYPT_OK) { |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
96 goto LBL_ERR; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
97 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
98 for (y = 0; y < x; y++) { |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
99 buf[1][y] ^= buf[0][y]; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
100 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
101 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
102 |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
103 /* now emit upto x bytes of buf[1] to output */ |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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104 for (y = 0; y < x && left != 0; ++y) { |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
105 out[stored++] = buf[1][y]; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
106 --left; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
107 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
108 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
109 *outlen = stored; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
110 |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
111 err = CRYPT_OK; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
112 LBL_ERR: |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
113 #ifdef LTC_CLEAN_STACK |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
114 zeromem(buf[0], MAXBLOCKSIZE*2); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
115 zeromem(hmac, sizeof(hmac_state)); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
116 #endif |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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117 |
1b9e69c058d2
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Matt Johnston <matt@ucc.asn.au>
parents:
diff
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118 XFREE(hmac); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
119 XFREE(buf[0]); |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
120 |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
121 return err; |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
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|
122 } |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
123 |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
124 #endif |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
125 |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
126 |
1b9e69c058d2
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 20dccfc09627970a312d77fb41dc2970b62689c3)
Matt Johnston <matt@ucc.asn.au>
parents:
diff
changeset
|
127 /* $Source: /cvs/libtom/libtomcrypt/src/misc/pkcs5/pkcs_5_2.c,v $ */ |
382
0cbe8f6dbf9e
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
285
diff
changeset
|
128 /* $Revision: 1.5 $ */ |
0cbe8f6dbf9e
propagate from branch 'au.asn.ucc.matt.ltc.dropbear' (head 2af22fb4e878750b88f80f90d439b316d229796f)
Matt Johnston <matt@ucc.asn.au>
parents:
285
diff
changeset
|
129 /* $Date: 2006/03/31 14:15:35 $ */ |