The Tor Browser / file comparison
comparison: security/manager/ssl/src/nsStreamCipher.cpp
security/manager/ssl/src/nsStreamCipher.cpp
- changeset 0
- 6474c204b198
equal
deleted
inserted
replaced
| -1:000000000000 | 0:94e6a25e951f |
|---|---|
| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 #include "nsIKeyModule.h" | |
| 6 #include "nsStreamCipher.h" | |
| 7 #include "nsStreamUtils.h" | |
| 8 #include "base64.h" | |
| 9 | |
| 10 NS_IMPL_ISUPPORTS(nsStreamCipher, nsIStreamCipher) | |
| 11 | |
| 12 nsStreamCipher::nsStreamCipher() | |
| 13 : mContext(nullptr) | |
| 14 { | |
| 15 } | |
| 16 | |
| 17 nsStreamCipher::~nsStreamCipher() | |
| 18 { | |
| 19 if (mContext) | |
| 20 PK11_DestroyContext(mContext, true /* free sub-objects */); | |
| 21 } | |
| 22 | |
| 23 nsresult | |
| 24 nsStreamCipher::InitWithIV_(nsIKeyObject *aKey, SECItem* aIV) | |
| 25 { | |
| 26 NS_ENSURE_ARG_POINTER(aKey); | |
| 27 | |
| 28 // Make sure we have a SYM_KEY. | |
| 29 int16_t keyType; | |
| 30 nsresult rv = aKey->GetType(&keyType); | |
| 31 NS_ENSURE_SUCCESS(rv, rv); | |
| 32 if (keyType != nsIKeyObject::SYM_KEY) | |
| 33 return NS_ERROR_INVALID_ARG; | |
| 34 | |
| 35 if (mContext) | |
| 36 PK11_DestroyContext(mContext, true /* free sub-objects */); | |
| 37 | |
| 38 // Get the PK11SymKey out of the key object and create the PK11Context. | |
| 39 void* keyObj; | |
| 40 rv = aKey->GetKeyObj(&keyObj); | |
| 41 NS_ENSURE_SUCCESS(rv, rv); | |
| 42 | |
| 43 PK11SymKey *symkey = reinterpret_cast<PK11SymKey*>(keyObj); | |
| 44 if (!symkey) | |
| 45 return NS_ERROR_FAILURE; | |
| 46 | |
| 47 CK_MECHANISM_TYPE cipherMech = PK11_GetMechanism(symkey); | |
| 48 | |
| 49 SECItem *param = nullptr; | |
| 50 // aIV may be null | |
| 51 param = PK11_ParamFromIV(cipherMech, aIV); | |
| 52 if (!param) | |
| 53 return NS_ERROR_FAILURE; | |
| 54 | |
| 55 mContext = PK11_CreateContextBySymKey(cipherMech, CKA_ENCRYPT, | |
| 56 symkey, param); | |
| 57 | |
| 58 SECITEM_FreeItem(param, true); | |
| 59 | |
| 60 // Something went wrong if mContext doesn't exist. | |
| 61 if (!mContext) | |
| 62 return NS_ERROR_FAILURE; | |
| 63 | |
| 64 // Everything went ok. | |
| 65 mValue.Truncate(); | |
| 66 return NS_OK; | |
| 67 } | |
| 68 | |
| 69 ///////////////////////////////////////////////////////////////////////////// | |
| 70 // nsIStreamCipher | |
| 71 | |
| 72 NS_IMETHODIMP nsStreamCipher::Init(nsIKeyObject *aKey) | |
| 73 { | |
| 74 return InitWithIV_(aKey, nullptr); | |
| 75 } | |
| 76 | |
| 77 NS_IMETHODIMP nsStreamCipher::InitWithIV(nsIKeyObject *aKey, | |
| 78 const uint8_t *aIV, uint32_t aIVLen) | |
| 79 { | |
| 80 SECItem IV; | |
| 81 IV.data = (unsigned char*)aIV; | |
| 82 IV.len = aIVLen; | |
| 83 return InitWithIV_(aKey, &IV); | |
| 84 } | |
| 85 | |
| 86 NS_IMETHODIMP nsStreamCipher::Update(const uint8_t *aData, uint32_t aLen) | |
| 87 { | |
| 88 if (!mContext) | |
| 89 return NS_ERROR_NOT_INITIALIZED; | |
| 90 | |
| 91 unsigned char* output = new unsigned char[aLen]; | |
| 92 unsigned char* input = (unsigned char*)aData; | |
| 93 | |
| 94 int32_t setLen; | |
| 95 | |
| 96 #ifdef DEBUG | |
| 97 SECStatus rv = | |
| 98 #endif | |
| 99 PK11_CipherOp(mContext, output, &setLen, aLen, input, aLen); | |
| 100 NS_ASSERTION(rv == SECSuccess, "failed to encrypt"); | |
| 101 NS_ASSERTION((uint32_t)setLen == aLen, "data length should not change"); | |
| 102 | |
| 103 mValue.Append((const char*)output, aLen); | |
| 104 | |
| 105 delete [] output; | |
| 106 | |
| 107 return NS_OK; | |
| 108 } | |
| 109 | |
| 110 NS_IMETHODIMP nsStreamCipher::UpdateFromStream(nsIInputStream *aStream, | |
| 111 int32_t aLen) | |
| 112 { | |
| 113 if (!mContext) | |
| 114 return NS_ERROR_NOT_INITIALIZED; | |
| 115 | |
| 116 nsCString inputString; | |
| 117 nsresult rv = NS_ConsumeStream(aStream, aLen, inputString); | |
| 118 NS_ENSURE_SUCCESS(rv, rv); | |
| 119 | |
| 120 return UpdateFromString(inputString); | |
| 121 } | |
| 122 | |
| 123 NS_IMETHODIMP nsStreamCipher::UpdateFromString(const nsACString& aInput) | |
| 124 { | |
| 125 if (!mContext) | |
| 126 return NS_ERROR_NOT_INITIALIZED; | |
| 127 | |
| 128 const nsCString& flatInput = PromiseFlatCString(aInput); | |
| 129 unsigned char* input = (unsigned char*)flatInput.get(); | |
| 130 uint32_t len = aInput.Length(); | |
| 131 | |
| 132 unsigned char* output = new unsigned char[len]; | |
| 133 | |
| 134 int32_t setLen; | |
| 135 | |
| 136 #ifdef DEBUG | |
| 137 SECStatus rv = | |
| 138 #endif | |
| 139 PK11_CipherOp(mContext, output, &setLen, len, input, len); | |
| 140 NS_ASSERTION(rv == SECSuccess, "failed to encrypt"); | |
| 141 NS_ASSERTION((uint32_t)setLen == len, "data length should not change"); | |
| 142 | |
| 143 mValue.Append((const char*)output, len); | |
| 144 delete [] output; | |
| 145 | |
| 146 return NS_OK; | |
| 147 } | |
| 148 | |
| 149 NS_IMETHODIMP nsStreamCipher::Finish(bool aASCII, nsACString & _retval) | |
| 150 { | |
| 151 if (!mContext) | |
| 152 return NS_ERROR_NOT_INITIALIZED; | |
| 153 | |
| 154 if (aASCII) { | |
| 155 char *asciiData = BTOA_DataToAscii((unsigned char*)(mValue.get()), | |
| 156 mValue.Length()); | |
| 157 _retval.Assign(asciiData); | |
| 158 PORT_Free(asciiData); | |
| 159 } else { | |
| 160 _retval.Assign(mValue); | |
| 161 } | |
| 162 | |
| 163 return NS_OK; | |
| 164 } | |
| 165 | |
| 166 NS_IMETHODIMP nsStreamCipher::Discard(int32_t aLen) | |
| 167 { | |
| 168 if (!mContext) | |
| 169 return NS_ERROR_NOT_INITIALIZED; | |
| 170 | |
| 171 unsigned char* output = new unsigned char[aLen]; | |
| 172 unsigned char* input = new unsigned char[aLen]; | |
| 173 | |
| 174 int32_t setLen; | |
| 175 | |
| 176 #ifdef DEBUG | |
| 177 SECStatus rv = | |
| 178 #endif | |
| 179 PK11_CipherOp(mContext, output, &setLen, aLen, input, aLen); | |
| 180 NS_ASSERTION(rv == SECSuccess, "failed to encrypt"); | |
| 181 NS_ASSERTION(setLen == aLen, "data length should not change"); | |
| 182 | |
| 183 delete [] output; | |
| 184 delete [] input; | |
| 185 return NS_OK; | |
| 186 } |
