Mercurial > trustbridge > nss-cmake-static
annotate nss/lib/freebl/tlsprfalg.c @ 1:247cffdc9b89
Add a pesodo config file for inlcude directories and library names
author | Andre Heinecke <andre.heinecke@intevation.de> |
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date | Mon, 28 Jul 2014 13:00:06 +0200 |
parents | 1e5118fa0cb1 |
children |
rev | line source |
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0
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1 /* tlsprfalg.c - TLS Pseudo Random Function (PRF) implementation |
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2 * |
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3 * This Source Code Form is subject to the terms of the Mozilla Public |
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4 * License, v. 2.0. If a copy of the MPL was not distributed with this |
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5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
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6 |
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7 #ifdef FREEBL_NO_DEPEND |
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8 #include "stubs.h" |
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9 #endif |
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10 |
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11 #include "blapi.h" |
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12 #include "hasht.h" |
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13 #include "alghmac.h" |
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14 |
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15 |
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16 #define PHASH_STATE_MAX_LEN HASH_LENGTH_MAX |
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17 |
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18 /* TLS P_hash function */ |
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19 SECStatus |
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20 TLS_P_hash(HASH_HashType hashType, const SECItem *secret, const char *label, |
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21 SECItem *seed, SECItem *result, PRBool isFIPS) |
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22 { |
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23 unsigned char state[PHASH_STATE_MAX_LEN]; |
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24 unsigned char outbuf[PHASH_STATE_MAX_LEN]; |
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25 unsigned int state_len = 0, label_len = 0, outbuf_len = 0, chunk_size; |
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26 unsigned int remaining; |
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27 unsigned char *res; |
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28 SECStatus status; |
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29 HMACContext *cx; |
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30 SECStatus rv = SECFailure; |
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31 const SECHashObject *hashObj = HASH_GetRawHashObject(hashType); |
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32 |
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33 PORT_Assert((secret != NULL) && (secret->data != NULL || !secret->len)); |
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34 PORT_Assert((seed != NULL) && (seed->data != NULL)); |
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35 PORT_Assert((result != NULL) && (result->data != NULL)); |
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36 |
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37 remaining = result->len; |
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38 res = result->data; |
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39 |
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40 if (label != NULL) |
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41 label_len = PORT_Strlen(label); |
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42 |
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43 cx = HMAC_Create(hashObj, secret->data, secret->len, isFIPS); |
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44 if (cx == NULL) |
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45 goto loser; |
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46 |
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47 /* initialize the state = A(1) = HMAC_hash(secret, seed) */ |
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48 HMAC_Begin(cx); |
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49 HMAC_Update(cx, (unsigned char *)label, label_len); |
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50 HMAC_Update(cx, seed->data, seed->len); |
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51 status = HMAC_Finish(cx, state, &state_len, sizeof(state)); |
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52 if (status != SECSuccess) |
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53 goto loser; |
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54 |
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55 /* generate a block at a time until we're done */ |
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56 while (remaining > 0) { |
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57 |
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58 HMAC_Begin(cx); |
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59 HMAC_Update(cx, state, state_len); |
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60 if (label_len) |
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61 HMAC_Update(cx, (unsigned char *)label, label_len); |
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62 HMAC_Update(cx, seed->data, seed->len); |
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63 status = HMAC_Finish(cx, outbuf, &outbuf_len, sizeof(outbuf)); |
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64 if (status != SECSuccess) |
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65 goto loser; |
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66 |
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67 /* Update the state = A(i) = HMAC_hash(secret, A(i-1)) */ |
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68 HMAC_Begin(cx); |
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69 HMAC_Update(cx, state, state_len); |
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70 status = HMAC_Finish(cx, state, &state_len, sizeof(state)); |
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71 if (status != SECSuccess) |
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72 goto loser; |
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73 |
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74 chunk_size = PR_MIN(outbuf_len, remaining); |
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75 PORT_Memcpy(res, &outbuf, chunk_size); |
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76 res += chunk_size; |
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77 remaining -= chunk_size; |
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78 } |
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79 |
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80 rv = SECSuccess; |
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81 |
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82 loser: |
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83 /* clear out state so it's not left on the stack */ |
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84 if (cx) |
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85 HMAC_Destroy(cx, PR_TRUE); |
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86 PORT_Memset(state, 0, sizeof(state)); |
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87 PORT_Memset(outbuf, 0, sizeof(outbuf)); |
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88 return rv; |
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89 } |
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90 |
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91 SECStatus |
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92 TLS_PRF(const SECItem *secret, const char *label, SECItem *seed, |
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93 SECItem *result, PRBool isFIPS) |
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94 { |
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95 SECStatus rv = SECFailure, status; |
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96 unsigned int i; |
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97 SECItem tmp = { siBuffer, NULL, 0}; |
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98 SECItem S1; |
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99 SECItem S2; |
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100 |
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101 PORT_Assert((secret != NULL) && (secret->data != NULL || !secret->len)); |
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102 PORT_Assert((seed != NULL) && (seed->data != NULL)); |
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103 PORT_Assert((result != NULL) && (result->data != NULL)); |
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104 |
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105 S1.type = siBuffer; |
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106 S1.len = (secret->len / 2) + (secret->len & 1); |
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107 S1.data = secret->data; |
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108 |
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109 S2.type = siBuffer; |
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110 S2.len = S1.len; |
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111 S2.data = secret->data + (secret->len - S2.len); |
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112 |
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113 tmp.data = (unsigned char*)PORT_Alloc(result->len); |
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114 if (tmp.data == NULL) |
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115 goto loser; |
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116 tmp.len = result->len; |
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This is NSS with a Cmake Buildsyste
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117 |
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This is NSS with a Cmake Buildsyste
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118 status = TLS_P_hash(HASH_AlgMD5, &S1, label, seed, result, isFIPS); |
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This is NSS with a Cmake Buildsyste
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119 if (status != SECSuccess) |
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This is NSS with a Cmake Buildsyste
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120 goto loser; |
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parents:
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changeset
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121 |
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This is NSS with a Cmake Buildsyste
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122 status = TLS_P_hash(HASH_AlgSHA1, &S2, label, seed, &tmp, isFIPS); |
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This is NSS with a Cmake Buildsyste
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123 if (status != SECSuccess) |
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This is NSS with a Cmake Buildsyste
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124 goto loser; |
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parents:
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125 |
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126 for (i = 0; i < result->len; i++) |
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This is NSS with a Cmake Buildsyste
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127 result->data[i] ^= tmp.data[i]; |
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This is NSS with a Cmake Buildsyste
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128 |
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129 rv = SECSuccess; |
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130 |
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131 loser: |
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132 if (tmp.data != NULL) |
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133 PORT_ZFree(tmp.data, tmp.len); |
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134 return rv; |
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Andre Heinecke <andre.heinecke@intevation.de>
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135 } |
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This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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136 |