Mercurial > trustbridge > nss-cmake-static

annotate nss/lib/softoken/tlsprf.c @ 4:b513267f632f tip

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Build DBM module
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:58:03 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* tlsprf.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 #include "pkcs11i.h"
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8 #include "blapi.h"
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9
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10 #define SFTK_OFFSETOF(str, memb) ((PRPtrdiff)(&(((str *)0)->memb)))
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11
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12 static void sftk_TLSPRFNull(void *data, PRBool freeit)
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13 {
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14 return;
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15 }
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16
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17 typedef struct {
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18 PRUint32 cxSize; /* size of allocated block, in bytes. */
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19 PRUint32 cxBufSize; /* sizeof buffer at cxBufPtr. */
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20 unsigned char *cxBufPtr; /* points to real buffer, may be cxBuf. */
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21 PRUint32 cxKeyLen; /* bytes of cxBufPtr containing key. */
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22 PRUint32 cxDataLen; /* bytes of cxBufPtr containing data. */
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23 SECStatus cxRv; /* records failure of void functions. */
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24 PRBool cxIsFIPS; /* true if conforming to FIPS 198. */
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25 HASH_HashType cxHashAlg; /* hash algorithm to use for TLS 1.2+ */
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26 unsigned char cxBuf[512]; /* actual size may be larger than 512. */
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27 } TLSPRFContext;
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28
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29 static void
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30 sftk_TLSPRFHashUpdate(TLSPRFContext *cx, const unsigned char *data,
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31 unsigned int data_len)
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32 {
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33 PRUint32 bytesUsed = cx->cxKeyLen + cx->cxDataLen;
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34
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35 if (cx->cxRv != SECSuccess) /* function has previously failed. */
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36 return;
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37 if (bytesUsed + data_len > cx->cxBufSize) {
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38 /* We don't use realloc here because
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39 ** (a) realloc doesn't zero out the old block, and
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40 ** (b) if realloc fails, we lose the old block.
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41 */
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42 PRUint32 newBufSize = bytesUsed + data_len + 512;
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43 unsigned char * newBuf = (unsigned char *)PORT_Alloc(newBufSize);
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44 if (!newBuf) {
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45 cx->cxRv = SECFailure;
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46 return;
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47 }
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48 PORT_Memcpy(newBuf, cx->cxBufPtr, bytesUsed);
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49 if (cx->cxBufPtr != cx->cxBuf) {
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50 PORT_ZFree(cx->cxBufPtr, bytesUsed);
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51 }
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52 cx->cxBufPtr = newBuf;
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53 cx->cxBufSize = newBufSize;
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54 }
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55 PORT_Memcpy(cx->cxBufPtr + bytesUsed, data, data_len);
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56 cx->cxDataLen += data_len;
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57 }
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58
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59 static void
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60 sftk_TLSPRFEnd(TLSPRFContext *ctx, unsigned char *hashout,
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61 unsigned int *pDigestLen, unsigned int maxDigestLen)
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62 {
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63 *pDigestLen = 0; /* tells Verify that no data has been input yet. */
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64 }
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65
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66 /* Compute the PRF values from the data previously input. */
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67 static SECStatus
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68 sftk_TLSPRFUpdate(TLSPRFContext *cx,
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69 unsigned char *sig, /* output goes here. */
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70 unsigned int * sigLen, /* how much output. */
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71 unsigned int maxLen, /* output buffer size */
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72 unsigned char *hash, /* unused. */
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73 unsigned int hashLen) /* unused. */
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74 {
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75 SECStatus rv;
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76 SECItem sigItem;
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77 SECItem seedItem;
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78 SECItem secretItem;
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79
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80 if (cx->cxRv != SECSuccess)
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81 return cx->cxRv;
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82
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83 secretItem.data = cx->cxBufPtr;
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84 secretItem.len = cx->cxKeyLen;
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85
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86 seedItem.data = cx->cxBufPtr + cx->cxKeyLen;
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87 seedItem.len = cx->cxDataLen;
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88
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89 sigItem.data = sig;
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90 sigItem.len = maxLen;
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91
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92 if (cx->cxHashAlg != HASH_AlgNULL) {
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93 rv = TLS_P_hash(cx->cxHashAlg, &secretItem, NULL, &seedItem, &sigItem,
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94 cx->cxIsFIPS);
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95 } else {
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96 rv = TLS_PRF(&secretItem, NULL, &seedItem, &sigItem, cx->cxIsFIPS);
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97 }
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98 if (rv == SECSuccess && sigLen != NULL)
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99 *sigLen = sigItem.len;
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100 return rv;
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101
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102 }
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103
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104 static SECStatus
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105 sftk_TLSPRFVerify(TLSPRFContext *cx,
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106 unsigned char *sig, /* input, for comparison. */
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107 unsigned int sigLen, /* length of sig. */
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108 unsigned char *hash, /* data to be verified. */
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109 unsigned int hashLen) /* size of hash data. */
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110 {
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111 unsigned char * tmp = (unsigned char *)PORT_Alloc(sigLen);
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112 unsigned int tmpLen = sigLen;
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113 SECStatus rv;
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114
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115 if (!tmp)
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116 return SECFailure;
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117 if (hashLen) {
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118 /* hashLen is non-zero when the user does a one-step verify.
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119 ** In this case, none of the data has been input yet.
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120 */
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121 sftk_TLSPRFHashUpdate(cx, hash, hashLen);
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122 }
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123 rv = sftk_TLSPRFUpdate(cx, tmp, &tmpLen, sigLen, NULL, 0);
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124 if (rv == SECSuccess) {
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125 rv = (SECStatus)(1 - !PORT_Memcmp(tmp, sig, sigLen));
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126 }
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127 PORT_ZFree(tmp, sigLen);
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128 return rv;
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129 }
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130
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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131 static void
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
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132 sftk_TLSPRFHashDestroy(TLSPRFContext *cx, PRBool freeit)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
133 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
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134 if (freeit) {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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135 if (cx->cxBufPtr != cx->cxBuf)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
136 PORT_ZFree(cx->cxBufPtr, cx->cxBufSize);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
137 PORT_ZFree(cx, cx->cxSize);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
138 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
139 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
140
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
141 CK_RV
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
142 sftk_TLSPRFInit(SFTKSessionContext *context,
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
143 SFTKObject * key,
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
144 CK_KEY_TYPE key_type,
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
145 HASH_HashType hash_alg)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
146 {
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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147 SFTKAttribute * keyVal;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
148 TLSPRFContext * prf_cx;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
149 CK_RV crv = CKR_HOST_MEMORY;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
150 PRUint32 keySize;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
151 PRUint32 blockSize;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
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152
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
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153 if (key_type != CKK_GENERIC_SECRET)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
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154 return CKR_KEY_TYPE_INCONSISTENT; /* CKR_KEY_FUNCTION_NOT_PERMITTED */
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
155
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
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156 context->multi = PR_TRUE;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
157
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
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158 keyVal = sftk_FindAttribute(key, CKA_VALUE);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
159 keySize = (!keyVal) ? 0 : keyVal->attrib.ulValueLen;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
160 blockSize = keySize + sizeof(TLSPRFContext);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
161 prf_cx = (TLSPRFContext *)PORT_Alloc(blockSize);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
162 if (!prf_cx)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
163 goto done;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
164 prf_cx->cxSize = blockSize;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
165 prf_cx->cxKeyLen = keySize;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
166 prf_cx->cxDataLen = 0;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
167 prf_cx->cxBufSize = blockSize - SFTK_OFFSETOF(TLSPRFContext, cxBuf);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
168 prf_cx->cxRv = SECSuccess;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
169 prf_cx->cxIsFIPS = (key->slot->slotID == FIPS_SLOT_ID);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
170 prf_cx->cxBufPtr = prf_cx->cxBuf;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
171 prf_cx->cxHashAlg = hash_alg;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
172 if (keySize)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
173 PORT_Memcpy(prf_cx->cxBufPtr, keyVal->attrib.pValue, keySize);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
174
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
175 context->hashInfo = (void *) prf_cx;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
176 context->cipherInfo = (void *) prf_cx;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
177 context->hashUpdate = (SFTKHash) sftk_TLSPRFHashUpdate;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
178 context->end = (SFTKEnd) sftk_TLSPRFEnd;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
179 context->update = (SFTKCipher) sftk_TLSPRFUpdate;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
180 context->verify = (SFTKVerify) sftk_TLSPRFVerify;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
181 context->destroy = (SFTKDestroy) sftk_TLSPRFNull;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
182 context->hashdestroy = (SFTKDestroy) sftk_TLSPRFHashDestroy;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
183 crv = CKR_OK;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
184
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
185 done:
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
186 if (keyVal)
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
187 sftk_FreeAttribute(keyVal);
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
188 return crv;
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
189 }
1e5118fa0cb1 This is NSS with a Cmake Buildsyste
Andre Heinecke <andre.heinecke@intevation.de>
parents:
diff changeset
190
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