| File: | s/lib/pk11wrap/pk11hpke.c |
| Warning: | line 829, column 5 Value stored to 'walker' is never read |
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| 1 | /* |
| 2 | * draft-irtf-cfrg-hpke-07 |
| 3 | * |
| 4 | * This Source Code Form is subject to the terms of the Mozilla Public |
| 5 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| 6 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. |
| 7 | */ |
| 8 | |
| 9 | #include "keyhi.h" |
| 10 | #include "pkcs11t.h" |
| 11 | #include "pk11func.h" |
| 12 | #include "pk11hpke.h" |
| 13 | #include "pk11pqg.h" |
| 14 | #include "secerr.h" |
| 15 | #include "secitem.h" |
| 16 | #include "secmod.h" |
| 17 | #include "secmodi.h" |
| 18 | #include "secmodti.h" |
| 19 | #include "secutil.h" |
| 20 | |
| 21 | #define SERIALIZATION_VERSION2 2 |
| 22 | |
| 23 | static const char *V1_LABEL = "HPKE-v1"; |
| 24 | static const char *EXP_LABEL = "exp"; |
| 25 | static const char *HPKE_LABEL = "HPKE"; |
| 26 | static const char *INFO_LABEL = "info_hash"; |
| 27 | static const char *KEM_LABEL = "KEM"; |
| 28 | static const char *KEY_LABEL = "key"; |
| 29 | static const char *NONCE_LABEL = "base_nonce"; |
| 30 | static const char *PSK_ID_LABEL = "psk_id_hash"; |
| 31 | static const char *SECRET_LABEL = "secret"; |
| 32 | static const char *SEC_LABEL = "sec"; |
| 33 | static const char *EAE_PRK_LABEL = "eae_prk"; |
| 34 | static const char *SH_SEC_LABEL = "shared_secret"; |
| 35 | |
| 36 | struct HpkeContextStr { |
| 37 | const hpkeKemParams *kemParams; |
| 38 | const hpkeKdfParams *kdfParams; |
| 39 | const hpkeAeadParams *aeadParams; |
| 40 | PRUint8 mode; /* Base and PSK modes supported. */ |
| 41 | SECItem *encapPubKey; /* Marshalled public key, sent to receiver. */ |
| 42 | SECItem *baseNonce; /* Deterministic nonce for AEAD. */ |
| 43 | SECItem *pskId; /* PSK identifier (non-secret). */ |
| 44 | PK11Context *aeadContext; /* AEAD context used by Seal/Open. */ |
| 45 | PRUint64 sequenceNumber; /* seqNo for decrypt IV construction. */ |
| 46 | PK11SymKey *sharedSecret; /* ExtractAndExpand output key. */ |
| 47 | PK11SymKey *key; /* Key used with the AEAD. */ |
| 48 | PK11SymKey *exporterSecret; /* Derivation key for ExportSecret. */ |
| 49 | PK11SymKey *psk; /* PSK imported by the application. */ |
| 50 | }; |
| 51 | |
| 52 | static const hpkeKemParams kemParams[] = { |
| 53 | /* KEM, Nsk, Nsecret, Npk, oidTag, Hash mechanism */ |
| 54 | { HpkeDhKemX25519Sha256, 32, 32, 32, SEC_OID_CURVE25519, CKM_SHA2560x00000250UL }, |
| 55 | }; |
| 56 | |
| 57 | #define MAX_WRAPPED_EXP_LEN72 72 // Largest kdfParams->Nh + 8 |
| 58 | static const hpkeKdfParams kdfParams[] = { |
| 59 | /* KDF, Nh, mechanism */ |
| 60 | { HpkeKdfHkdfSha256, SHA256_LENGTH32, CKM_SHA2560x00000250UL }, |
| 61 | { HpkeKdfHkdfSha384, SHA384_LENGTH48, CKM_SHA3840x00000260UL }, |
| 62 | { HpkeKdfHkdfSha512, SHA512_LENGTH64, CKM_SHA5120x00000270UL }, |
| 63 | }; |
| 64 | #define MAX_WRAPPED_KEY_LEN40 40 // Largest aeadParams->Nk + 8 |
| 65 | static const hpkeAeadParams aeadParams[] = { |
| 66 | /* AEAD, Nk, Nn, tagLen, mechanism */ |
| 67 | { HpkeAeadAes128Gcm, 16, 12, 16, CKM_AES_GCM0x00001087UL }, |
| 68 | { HpkeAeadAes256Gcm, 32, 12, 16, CKM_AES_GCM0x00001087UL }, |
| 69 | { HpkeAeadChaCha20Poly1305, 32, 12, 16, CKM_CHACHA20_POLY13050x00004021UL }, |
| 70 | }; |
| 71 | |
| 72 | static inline const hpkeKemParams * |
| 73 | kemId2Params(HpkeKemId kemId) |
| 74 | { |
| 75 | switch (kemId) { |
| 76 | case HpkeDhKemX25519Sha256: |
| 77 | return &kemParams[0]; |
| 78 | default: |
| 79 | return NULL((void*)0); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | static inline const hpkeKdfParams * |
| 84 | kdfId2Params(HpkeKdfId kdfId) |
| 85 | { |
| 86 | switch (kdfId) { |
| 87 | case HpkeKdfHkdfSha256: |
| 88 | return &kdfParams[0]; |
| 89 | case HpkeKdfHkdfSha384: |
| 90 | return &kdfParams[1]; |
| 91 | case HpkeKdfHkdfSha512: |
| 92 | return &kdfParams[2]; |
| 93 | default: |
| 94 | return NULL((void*)0); |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | static const inline hpkeAeadParams * |
| 99 | aeadId2Params(HpkeAeadId aeadId) |
| 100 | { |
| 101 | switch (aeadId) { |
| 102 | case HpkeAeadAes128Gcm: |
| 103 | return &aeadParams[0]; |
| 104 | case HpkeAeadAes256Gcm: |
| 105 | return &aeadParams[1]; |
| 106 | case HpkeAeadChaCha20Poly1305: |
| 107 | return &aeadParams[2]; |
| 108 | default: |
| 109 | return NULL((void*)0); |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | static PRUint8 * |
| 114 | encodeNumber(PRUint64 value, PRUint8 *b, size_t count) |
| 115 | { |
| 116 | PRUint64 encoded; |
| 117 | PORT_Assert(b && count > 0 && count <= sizeof(encoded))((b && count > 0 && count <= sizeof(encoded ))?((void)0):PR_Assert("b && count > 0 && count <= sizeof(encoded)" ,"pk11hpke.c",117)); |
| 118 | |
| 119 | encoded = PR_htonll(value); |
| 120 | PORT_Memcpymemcpy(b, ((unsigned char *)(&encoded)) + (sizeof(encoded) - count), |
| 121 | count); |
| 122 | return b + count; |
| 123 | } |
| 124 | |
| 125 | static PRUint8 * |
| 126 | decodeNumber(PRUint64 *value, PRUint8 *b, size_t count) |
| 127 | { |
| 128 | unsigned int i; |
| 129 | PRUint64 number = 0; |
| 130 | PORT_Assert(b && value && count <= sizeof(*value))((b && value && count <= sizeof(*value))?( (void)0):PR_Assert("b && value && count <= sizeof(*value)" ,"pk11hpke.c",130)); |
| 131 | |
| 132 | for (i = 0; i < count; i++) { |
| 133 | number = (number << 8) + b[i]; |
| 134 | } |
| 135 | *value = number; |
| 136 | return b + count; |
| 137 | } |
| 138 | |
| 139 | SECStatus |
| 140 | PK11_HPKE_ValidateParameters(HpkeKemId kemId, HpkeKdfId kdfId, HpkeAeadId aeadId) |
| 141 | { |
| 142 | /* If more variants are added, ensure the combination is also |
| 143 | * legal. For now it is, since only the AEAD may vary. */ |
| 144 | const hpkeKemParams *kem = kemId2Params(kemId); |
| 145 | const hpkeKdfParams *kdf = kdfId2Params(kdfId); |
| 146 | const hpkeAeadParams *aead = aeadId2Params(aeadId); |
| 147 | if (!kem || !kdf || !aead) { |
| 148 | PORT_SetErrorPORT_SetError_Util(SEC_ERROR_INVALID_ARGS); |
| 149 | return SECFailure; |
| 150 | } |
| 151 | return SECSuccess; |
| 152 | } |
| 153 | |
| 154 | HpkeContext * |
| 155 | PK11_HPKE_NewContext(HpkeKemId kemId, HpkeKdfId kdfId, HpkeAeadId aeadId, |
| 156 | PK11SymKey *psk, const SECItem *pskId) |
| 157 | { |
| 158 | SECStatus rv = SECSuccess; |
| 159 | PK11SlotInfo *slot = NULL((void*)0); |
| 160 | HpkeContext *cx = NULL((void*)0); |
| 161 | /* Both the PSK and the PSK ID default to empty. */ |
| 162 | SECItem emptyItem = { siBuffer, NULL((void*)0), 0 }; |
| 163 | |
| 164 | cx = PORT_ZNew(HpkeContext)(HpkeContext *)PORT_ZAlloc_Util(sizeof(HpkeContext)); |
| 165 | if (!cx) { |
| 166 | return NULL((void*)0); |
| 167 | } |
| 168 | cx->mode = psk ? HpkeModePsk : HpkeModeBase; |
| 169 | cx->kemParams = kemId2Params(kemId); |
| 170 | cx->kdfParams = kdfId2Params(kdfId); |
| 171 | cx->aeadParams = aeadId2Params(aeadId); |
| 172 | CHECK_FAIL_ERR((!!psk != !!pskId), SEC_ERROR_INVALID_ARGS)if (((!!psk != !!pskId))) { PORT_SetError_Util((SEC_ERROR_INVALID_ARGS )); rv = SECFailure; goto cleanup; }; |
| 173 | CHECK_FAIL_ERR(!cx->kemParams || !cx->kdfParams || !cx->aeadParams,if ((!cx->kemParams || !cx->kdfParams || !cx->aeadParams )) { PORT_SetError_Util((SEC_ERROR_INVALID_ARGS)); rv = SECFailure ; goto cleanup; } |
| 174 | SEC_ERROR_INVALID_ARGS)if ((!cx->kemParams || !cx->kdfParams || !cx->aeadParams )) { PORT_SetError_Util((SEC_ERROR_INVALID_ARGS)); rv = SECFailure ; goto cleanup; }; |
| 175 | |
| 176 | /* Import the provided PSK or the default. */ |
| 177 | slot = PK11_GetBestSlot(CKM_EC_KEY_PAIR_GEN0x00001040UL, NULL((void*)0)); |
| 178 | CHECK_FAIL(!slot)if ((!slot)) { rv = SECFailure; goto cleanup; }; |
| 179 | if (psk) { |
| 180 | cx->psk = PK11_ReferenceSymKey(psk); |
| 181 | cx->pskId = SECITEM_DupItemSECITEM_DupItem_Util(pskId); |
| 182 | } else { |
| 183 | cx->psk = PK11_ImportDataKey(slot, CKM_HKDF_DATA0x0000402bUL, PK11_OriginUnwrap, |
| 184 | CKA_DERIVE0x0000010CUL, &emptyItem, NULL((void*)0)); |
| 185 | cx->pskId = SECITEM_DupItemSECITEM_DupItem_Util(&emptyItem); |
| 186 | } |
| 187 | CHECK_FAIL(!cx->psk)if ((!cx->psk)) { rv = SECFailure; goto cleanup; }; |
| 188 | CHECK_FAIL(!cx->pskId)if ((!cx->pskId)) { rv = SECFailure; goto cleanup; }; |
| 189 | |
| 190 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,190)); cleanup: |
| 191 | if (rv != SECSuccess) { |
| 192 | PK11_FreeSymKey(cx->psk); |
| 193 | SECITEM_FreeItemSECITEM_FreeItem_Util(cx->pskId, PR_TRUE1); |
| 194 | cx->pskId = NULL((void*)0); |
| 195 | cx->psk = NULL((void*)0); |
| 196 | PORT_FreePORT_Free_Util(cx); |
| 197 | cx = NULL((void*)0); |
| 198 | } |
| 199 | if (slot) { |
| 200 | PK11_FreeSlot(slot); |
| 201 | } |
| 202 | return cx; |
| 203 | } |
| 204 | |
| 205 | void |
| 206 | PK11_HPKE_DestroyContext(HpkeContext *cx, PRBool freeit) |
| 207 | { |
| 208 | if (!cx) { |
| 209 | return; |
| 210 | } |
| 211 | |
| 212 | if (cx->aeadContext) { |
| 213 | PK11_DestroyContext((PK11Context *)cx->aeadContext, PR_TRUE1); |
| 214 | cx->aeadContext = NULL((void*)0); |
| 215 | } |
| 216 | PK11_FreeSymKey(cx->exporterSecret); |
| 217 | PK11_FreeSymKey(cx->sharedSecret); |
| 218 | PK11_FreeSymKey(cx->key); |
| 219 | PK11_FreeSymKey(cx->psk); |
| 220 | SECITEM_FreeItemSECITEM_FreeItem_Util(cx->pskId, PR_TRUE1); |
| 221 | SECITEM_FreeItemSECITEM_FreeItem_Util(cx->baseNonce, PR_TRUE1); |
| 222 | SECITEM_FreeItemSECITEM_FreeItem_Util(cx->encapPubKey, PR_TRUE1); |
| 223 | cx->exporterSecret = NULL((void*)0); |
| 224 | cx->sharedSecret = NULL((void*)0); |
| 225 | cx->key = NULL((void*)0); |
| 226 | cx->psk = NULL((void*)0); |
| 227 | cx->pskId = NULL((void*)0); |
| 228 | cx->baseNonce = NULL((void*)0); |
| 229 | cx->encapPubKey = NULL((void*)0); |
| 230 | if (freeit) { |
| 231 | PORT_ZFreePORT_ZFree_Util(cx, sizeof(HpkeContext)); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | /* Export Format: |
| 236 | struct { |
| 237 | uint8 serilizationVersion; |
| 238 | uint16 kemId; |
| 239 | uint16 kdfId; |
| 240 | uint16 aeadId; |
| 241 | uint16 modeId; |
| 242 | uint64 sequenceNumber; |
| 243 | opaque senderPubKey<1..2^16-1>; |
| 244 | opaque baseNonce<1..2^16-1>; |
| 245 | opaque key<1..2^16-1>; |
| 246 | opaque exporterSecret<1..2^16-1>; |
| 247 | } HpkeSerializedContext |
| 248 | */ |
| 249 | #define EXPORTED_CTX_BASE_LEN25 25 /* Fixed size plus 2B for each variable. */ |
| 250 | #define REMAINING_BYTES(walker, buf)buf->len - (walker - buf->data) \ |
| 251 | buf->len - (walker - buf->data) |
| 252 | SECStatus |
| 253 | PK11_HPKE_ExportContext(const HpkeContext *cx, PK11SymKey *wrapKey, SECItem **serialized) |
| 254 | { |
| 255 | SECStatus rv; |
| 256 | size_t allocLen; |
| 257 | PRUint8 *walker; |
| 258 | SECItem *keyBytes = NULL((void*)0); // Maybe wrapped |
| 259 | SECItem *exporterBytes = NULL((void*)0); // Maybe wrapped |
| 260 | SECItem *serializedCx = NULL((void*)0); |
| 261 | PRUint8 wrappedKeyBytes[MAX_WRAPPED_KEY_LEN40] = { 0 }; |
| 262 | PRUint8 wrappedExpBytes[MAX_WRAPPED_EXP_LEN72] = { 0 }; |
| 263 | SECItem wrappedKey = { siBuffer, wrappedKeyBytes, sizeof(wrappedKeyBytes) }; |
| 264 | SECItem wrappedExp = { siBuffer, wrappedExpBytes, sizeof(wrappedExpBytes) }; |
| 265 | |
| 266 | CHECK_FAIL_ERR((!cx || !cx->aeadContext || !serialized), SEC_ERROR_INVALID_ARGS)if (((!cx || !cx->aeadContext || !serialized))) { PORT_SetError_Util ((SEC_ERROR_INVALID_ARGS)); rv = SECFailure; goto cleanup; }; |
| 267 | CHECK_FAIL_ERR((cx->aeadContext->operation != (CKA_NSS_MESSAGE | CKA_DECRYPT)),if (((cx->aeadContext->operation != (0x82000000L | 0x00000105UL )))) { PORT_SetError_Util((SEC_ERROR_NOT_A_RECIPIENT)); rv = SECFailure ; goto cleanup; } |
| 268 | SEC_ERROR_NOT_A_RECIPIENT)if (((cx->aeadContext->operation != (0x82000000L | 0x00000105UL )))) { PORT_SetError_Util((SEC_ERROR_NOT_A_RECIPIENT)); rv = SECFailure ; goto cleanup; }; |
| 269 | |
| 270 | /* If a wrapping key was provided, do the wrap first |
| 271 | * so that we know what size to allocate. */ |
| 272 | if (wrapKey) { |
| 273 | rv = PK11_WrapSymKey(CKM_AES_KEY_WRAP_KWP0x0000210BUL, NULL((void*)0), wrapKey, |
| 274 | cx->key, &wrappedKey); |
| 275 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 276 | rv = PK11_WrapSymKey(CKM_AES_KEY_WRAP_KWP0x0000210BUL, NULL((void*)0), wrapKey, |
| 277 | cx->exporterSecret, &wrappedExp); |
| 278 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 279 | |
| 280 | keyBytes = &wrappedKey; |
| 281 | exporterBytes = &wrappedExp; |
| 282 | } else { |
| 283 | rv = PK11_ExtractKeyValue(cx->key); |
| 284 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 285 | keyBytes = PK11_GetKeyData(cx->key); |
| 286 | CHECK_FAIL(!keyBytes)if ((!keyBytes)) { rv = SECFailure; goto cleanup; }; |
| 287 | PORT_Assert(keyBytes->len == cx->aeadParams->Nk)((keyBytes->len == cx->aeadParams->Nk)?((void)0):PR_Assert ("keyBytes->len == cx->aeadParams->Nk","pk11hpke.c", 287)); |
| 288 | |
| 289 | rv = PK11_ExtractKeyValue(cx->exporterSecret); |
| 290 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 291 | exporterBytes = PK11_GetKeyData(cx->exporterSecret); |
| 292 | CHECK_FAIL(!exporterBytes)if ((!exporterBytes)) { rv = SECFailure; goto cleanup; }; |
| 293 | PORT_Assert(exporterBytes->len == cx->kdfParams->Nh)((exporterBytes->len == cx->kdfParams->Nh)?((void)0) :PR_Assert("exporterBytes->len == cx->kdfParams->Nh" ,"pk11hpke.c",293)); |
| 294 | } |
| 295 | |
| 296 | allocLen = EXPORTED_CTX_BASE_LEN25 + cx->baseNonce->len + cx->encapPubKey->len; |
| 297 | allocLen += wrapKey ? wrappedKey.len : cx->aeadParams->Nk; |
| 298 | allocLen += wrapKey ? wrappedExp.len : cx->kdfParams->Nh; |
| 299 | |
| 300 | serializedCx = SECITEM_AllocItemSECITEM_AllocItem_Util(NULL((void*)0), NULL((void*)0), allocLen); |
| 301 | CHECK_FAIL(!serializedCx)if ((!serializedCx)) { rv = SECFailure; goto cleanup; }; |
| 302 | |
| 303 | walker = &serializedCx->data[0]; |
| 304 | *(walker)++ = (PRUint8)SERIALIZATION_VERSION2; |
| 305 | |
| 306 | walker = encodeNumber(cx->kemParams->id, walker, 2); |
| 307 | walker = encodeNumber(cx->kdfParams->id, walker, 2); |
| 308 | walker = encodeNumber(cx->aeadParams->id, walker, 2); |
| 309 | walker = encodeNumber(cx->mode, walker, 2); |
| 310 | walker = encodeNumber(cx->sequenceNumber, walker, 8); |
| 311 | |
| 312 | /* sender public key, serialized. */ |
| 313 | walker = encodeNumber(cx->encapPubKey->len, walker, 2); |
| 314 | PORT_Memcpymemcpy(walker, cx->encapPubKey->data, cx->encapPubKey->len); |
| 315 | walker += cx->encapPubKey->len; |
| 316 | |
| 317 | /* base nonce */ |
| 318 | walker = encodeNumber(cx->baseNonce->len, walker, 2); |
| 319 | PORT_Memcpymemcpy(walker, cx->baseNonce->data, cx->baseNonce->len); |
| 320 | walker += cx->baseNonce->len; |
| 321 | |
| 322 | /* key. */ |
| 323 | walker = encodeNumber(keyBytes->len, walker, 2); |
| 324 | PORT_Memcpymemcpy(walker, keyBytes->data, keyBytes->len); |
| 325 | walker += keyBytes->len; |
| 326 | |
| 327 | /* exporter_secret. */ |
| 328 | walker = encodeNumber(exporterBytes->len, walker, 2); |
| 329 | PORT_Memcpymemcpy(walker, exporterBytes->data, exporterBytes->len); |
| 330 | walker += exporterBytes->len; |
| 331 | |
| 332 | CHECK_FAIL_ERR(REMAINING_BYTES(walker, serializedCx) != 0,if ((serializedCx->len - (walker - serializedCx->data) != 0)) { PORT_SetError_Util((SEC_ERROR_LIBRARY_FAILURE)); rv = SECFailure ; goto cleanup; } |
| 333 | SEC_ERROR_LIBRARY_FAILURE)if ((serializedCx->len - (walker - serializedCx->data) != 0)) { PORT_SetError_Util((SEC_ERROR_LIBRARY_FAILURE)); rv = SECFailure ; goto cleanup; }; |
| 334 | *serialized = serializedCx; |
| 335 | |
| 336 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,336)); cleanup: |
| 337 | if (rv != SECSuccess) { |
| 338 | SECITEM_ZfreeItemSECITEM_ZfreeItem_Util(serializedCx, PR_TRUE1); |
| 339 | } |
| 340 | return rv; |
| 341 | } |
| 342 | |
| 343 | HpkeContext * |
| 344 | PK11_HPKE_ImportContext(const SECItem *serialized, PK11SymKey *wrapKey) |
| 345 | { |
| 346 | SECStatus rv = SECSuccess; |
| 347 | HpkeContext *cx = NULL((void*)0); |
| 348 | PRUint8 *walker; |
| 349 | PRUint64 tmpn; |
| 350 | PRUint8 tmp8; |
| 351 | HpkeKemId kem; |
| 352 | HpkeKdfId kdf; |
| 353 | HpkeAeadId aead; |
| 354 | PK11SlotInfo *slot = NULL((void*)0); |
| 355 | PK11SymKey *tmpKey = NULL((void*)0); |
| 356 | SECItem tmpItem = { siBuffer, NULL((void*)0), 0 }; |
| 357 | SECItem emptyItem = { siBuffer, NULL((void*)0), 0 }; |
| 358 | |
| 359 | CHECK_FAIL_ERR((!serialized || !serialized->data || serialized->len == 0),if (((!serialized || !serialized->data || serialized->len == 0))) { PORT_SetError_Util((SEC_ERROR_INVALID_ARGS)); rv = SECFailure; goto cleanup; } |
| 360 | SEC_ERROR_INVALID_ARGS)if (((!serialized || !serialized->data || serialized->len == 0))) { PORT_SetError_Util((SEC_ERROR_INVALID_ARGS)); rv = SECFailure; goto cleanup; }; |
| 361 | CHECK_FAIL_ERR((serialized->len < EXPORTED_CTX_BASE_LEN), SEC_ERROR_BAD_DATA)if (((serialized->len < 25))) { PORT_SetError_Util((SEC_ERROR_BAD_DATA )); rv = SECFailure; goto cleanup; }; |
| 362 | |
| 363 | walker = serialized->data; |
| 364 | |
| 365 | tmp8 = *(walker++); |
| 366 | CHECK_FAIL_ERR((tmp8 != SERIALIZATION_VERSION), SEC_ERROR_BAD_DATA)if (((tmp8 != 2))) { PORT_SetError_Util((SEC_ERROR_BAD_DATA)) ; rv = SECFailure; goto cleanup; }; |
| 367 | |
| 368 | walker = decodeNumber(&tmpn, walker, 2); |
| 369 | kem = (HpkeKemId)tmpn; |
| 370 | |
| 371 | walker = decodeNumber(&tmpn, walker, 2); |
| 372 | kdf = (HpkeKdfId)tmpn; |
| 373 | |
| 374 | walker = decodeNumber(&tmpn, walker, 2); |
| 375 | aead = (HpkeAeadId)tmpn; |
| 376 | |
| 377 | /* Create context. We'll manually set the mode, though we |
| 378 | * no longer have the PSK and have no need for it. */ |
| 379 | cx = PK11_HPKE_NewContext(kem, kdf, aead, NULL((void*)0), NULL((void*)0)); |
| 380 | CHECK_FAIL(!cx)if ((!cx)) { rv = SECFailure; goto cleanup; }; |
| 381 | |
| 382 | walker = decodeNumber(&tmpn, walker, 2); |
| 383 | CHECK_FAIL_ERR((tmpn != HpkeModeBase && tmpn != HpkeModePsk),if (((tmpn != HpkeModeBase && tmpn != HpkeModePsk))) { PORT_SetError_Util((SEC_ERROR_BAD_DATA)); rv = SECFailure; goto cleanup; } |
| 384 | SEC_ERROR_BAD_DATA)if (((tmpn != HpkeModeBase && tmpn != HpkeModePsk))) { PORT_SetError_Util((SEC_ERROR_BAD_DATA)); rv = SECFailure; goto cleanup; }; |
| 385 | cx->mode = (HpkeModeId)tmpn; |
| 386 | |
| 387 | walker = decodeNumber(&cx->sequenceNumber, walker, 8); |
| 388 | slot = PK11_GetBestSlot(CKM_HKDF_DERIVE0x0000402aUL, NULL((void*)0)); |
| 389 | CHECK_FAIL(!slot)if ((!slot)) { rv = SECFailure; goto cleanup; }; |
| 390 | |
| 391 | /* Import sender public key (serialized). */ |
| 392 | walker = decodeNumber(&tmpn, walker, 2); |
| 393 | CHECK_FAIL_ERR(tmpn >= REMAINING_BYTES(walker, serialized),if ((tmpn >= serialized->len - (walker - serialized-> data))) { PORT_SetError_Util((SEC_ERROR_BAD_DATA)); rv = SECFailure ; goto cleanup; } |
| 394 | SEC_ERROR_BAD_DATA)if ((tmpn >= serialized->len - (walker - serialized-> data))) { PORT_SetError_Util((SEC_ERROR_BAD_DATA)); rv = SECFailure ; goto cleanup; }; |
| 395 | tmpItem.data = walker; |
| 396 | tmpItem.len = tmpn; |
| 397 | cx->encapPubKey = SECITEM_DupItemSECITEM_DupItem_Util(&tmpItem); |
| 398 | CHECK_FAIL(!cx->encapPubKey)if ((!cx->encapPubKey)) { rv = SECFailure; goto cleanup; }; |
| 399 | walker += tmpItem.len; |
| 400 | |
| 401 | /* Import base_nonce. */ |
| 402 | walker = decodeNumber(&tmpn, walker, 2); |
| 403 | CHECK_FAIL_ERR(tmpn != cx->aeadParams->Nn, SEC_ERROR_BAD_DATA)if ((tmpn != cx->aeadParams->Nn)) { PORT_SetError_Util( (SEC_ERROR_BAD_DATA)); rv = SECFailure; goto cleanup; }; |
| 404 | CHECK_FAIL_ERR(tmpn >= REMAINING_BYTES(walker, serialized),if ((tmpn >= serialized->len - (walker - serialized-> data))) { PORT_SetError_Util((SEC_ERROR_BAD_DATA)); rv = SECFailure ; goto cleanup; } |
| 405 | SEC_ERROR_BAD_DATA)if ((tmpn >= serialized->len - (walker - serialized-> data))) { PORT_SetError_Util((SEC_ERROR_BAD_DATA)); rv = SECFailure ; goto cleanup; }; |
| 406 | tmpItem.data = walker; |
| 407 | tmpItem.len = tmpn; |
| 408 | cx->baseNonce = SECITEM_DupItemSECITEM_DupItem_Util(&tmpItem); |
| 409 | CHECK_FAIL(!cx->baseNonce)if ((!cx->baseNonce)) { rv = SECFailure; goto cleanup; }; |
| 410 | walker += tmpItem.len; |
| 411 | |
| 412 | /* Import key */ |
| 413 | walker = decodeNumber(&tmpn, walker, 2); |
| 414 | CHECK_FAIL_ERR(tmpn >= REMAINING_BYTES(walker, serialized),if ((tmpn >= serialized->len - (walker - serialized-> data))) { PORT_SetError_Util((SEC_ERROR_BAD_DATA)); rv = SECFailure ; goto cleanup; } |
| 415 | SEC_ERROR_BAD_DATA)if ((tmpn >= serialized->len - (walker - serialized-> data))) { PORT_SetError_Util((SEC_ERROR_BAD_DATA)); rv = SECFailure ; goto cleanup; }; |
| 416 | tmpItem.data = walker; |
| 417 | tmpItem.len = tmpn; |
| 418 | walker += tmpItem.len; |
| 419 | if (wrapKey) { |
| 420 | cx->key = PK11_UnwrapSymKey(wrapKey, CKM_AES_KEY_WRAP_KWP0x0000210BUL, |
| 421 | NULL((void*)0), &tmpItem, cx->aeadParams->mech, |
| 422 | CKA_NSS_MESSAGE0x82000000L | CKA_DECRYPT0x00000105UL, 0); |
| 423 | CHECK_FAIL(!cx->key)if ((!cx->key)) { rv = SECFailure; goto cleanup; }; |
| 424 | } else { |
| 425 | CHECK_FAIL_ERR(tmpn != cx->aeadParams->Nk, SEC_ERROR_BAD_DATA)if ((tmpn != cx->aeadParams->Nk)) { PORT_SetError_Util( (SEC_ERROR_BAD_DATA)); rv = SECFailure; goto cleanup; }; |
| 426 | tmpKey = PK11_ImportSymKey(slot, cx->aeadParams->mech, |
| 427 | PK11_OriginUnwrap, CKA_NSS_MESSAGE0x82000000L | CKA_DECRYPT0x00000105UL, |
| 428 | &tmpItem, NULL((void*)0)); |
| 429 | CHECK_FAIL(!tmpKey)if ((!tmpKey)) { rv = SECFailure; goto cleanup; }; |
| 430 | cx->key = tmpKey; |
| 431 | } |
| 432 | |
| 433 | /* Import exporter_secret. */ |
| 434 | walker = decodeNumber(&tmpn, walker, 2); |
| 435 | CHECK_FAIL_ERR(tmpn != REMAINING_BYTES(walker, serialized),if ((tmpn != serialized->len - (walker - serialized->data ))) { PORT_SetError_Util((SEC_ERROR_BAD_DATA)); rv = SECFailure ; goto cleanup; } |
| 436 | SEC_ERROR_BAD_DATA)if ((tmpn != serialized->len - (walker - serialized->data ))) { PORT_SetError_Util((SEC_ERROR_BAD_DATA)); rv = SECFailure ; goto cleanup; }; |
| 437 | tmpItem.data = walker; |
| 438 | tmpItem.len = tmpn; |
| 439 | walker += tmpItem.len; |
| 440 | |
| 441 | if (wrapKey) { |
| 442 | cx->exporterSecret = PK11_UnwrapSymKey(wrapKey, CKM_AES_KEY_WRAP_KWP0x0000210BUL, |
| 443 | NULL((void*)0), &tmpItem, cx->kdfParams->mech, |
| 444 | CKM_HKDF_DERIVE0x0000402aUL, 0); |
| 445 | CHECK_FAIL(!cx->exporterSecret)if ((!cx->exporterSecret)) { rv = SECFailure; goto cleanup ; }; |
| 446 | } else { |
| 447 | CHECK_FAIL_ERR(tmpn != cx->kdfParams->Nh, SEC_ERROR_BAD_DATA)if ((tmpn != cx->kdfParams->Nh)) { PORT_SetError_Util(( SEC_ERROR_BAD_DATA)); rv = SECFailure; goto cleanup; }; |
| 448 | tmpKey = PK11_ImportSymKey(slot, CKM_HKDF_DERIVE0x0000402aUL, PK11_OriginUnwrap, |
| 449 | CKA_DERIVE0x0000010CUL, &tmpItem, NULL((void*)0)); |
| 450 | CHECK_FAIL(!tmpKey)if ((!tmpKey)) { rv = SECFailure; goto cleanup; }; |
| 451 | cx->exporterSecret = tmpKey; |
| 452 | } |
| 453 | |
| 454 | cx->aeadContext = PK11_CreateContextBySymKey(cx->aeadParams->mech, |
| 455 | CKA_NSS_MESSAGE0x82000000L | CKA_DECRYPT0x00000105UL, |
| 456 | cx->key, &emptyItem); |
| 457 | |
| 458 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,458)); cleanup: |
| 459 | if (rv != SECSuccess) { |
| 460 | PK11_FreeSymKey(tmpKey); |
| 461 | PK11_HPKE_DestroyContext(cx, PR_TRUE1); |
| 462 | cx = NULL((void*)0); |
| 463 | } |
| 464 | if (slot) { |
| 465 | PK11_FreeSlot(slot); |
| 466 | } |
| 467 | |
| 468 | return cx; |
| 469 | } |
| 470 | |
| 471 | SECStatus |
| 472 | PK11_HPKE_Serialize(const SECKEYPublicKey *pk, PRUint8 *buf, unsigned int *len, unsigned int maxLen) |
| 473 | { |
| 474 | if (!pk || !len || pk->keyType != ecKey) { |
| 475 | PORT_SetErrorPORT_SetError_Util(SEC_ERROR_INVALID_ARGS); |
| 476 | return SECFailure; |
| 477 | } |
| 478 | |
| 479 | /* If no buffer provided, return the length required for |
| 480 | * the serialized public key. */ |
| 481 | if (!buf) { |
| 482 | *len = pk->u.ec.publicValue.len; |
| 483 | return SECSuccess; |
| 484 | } |
| 485 | |
| 486 | if (maxLen < pk->u.ec.publicValue.len) { |
| 487 | PORT_SetErrorPORT_SetError_Util(SEC_ERROR_INPUT_LEN); |
| 488 | return SECFailure; |
| 489 | } |
| 490 | |
| 491 | PORT_Memcpymemcpy(buf, pk->u.ec.publicValue.data, pk->u.ec.publicValue.len); |
| 492 | *len = pk->u.ec.publicValue.len; |
| 493 | return SECSuccess; |
| 494 | }; |
| 495 | |
| 496 | SECStatus |
| 497 | PK11_HPKE_Deserialize(const HpkeContext *cx, const PRUint8 *enc, |
| 498 | unsigned int encLen, SECKEYPublicKey **outPubKey) |
| 499 | { |
| 500 | SECStatus rv; |
| 501 | SECKEYPublicKey *pubKey = NULL((void*)0); |
| 502 | SECOidData *oidData = NULL((void*)0); |
| 503 | PLArenaPool *arena; |
| 504 | |
| 505 | if (!cx || !enc || encLen == 0 || !outPubKey) { |
| 506 | PORT_SetErrorPORT_SetError_Util(SEC_ERROR_INVALID_ARGS); |
| 507 | return SECFailure; |
| 508 | } |
| 509 | |
| 510 | arena = PORT_NewArenaPORT_NewArena_Util(DER_DEFAULT_CHUNKSIZE(2048)); |
| 511 | CHECK_FAIL(!arena)if ((!arena)) { rv = SECFailure; goto cleanup; }; |
| 512 | pubKey = PORT_ArenaZNew(arena, SECKEYPublicKey)(SECKEYPublicKey *)PORT_ArenaZAlloc_Util(arena, sizeof(SECKEYPublicKey )); |
| 513 | CHECK_FAIL(!pubKey)if ((!pubKey)) { rv = SECFailure; goto cleanup; }; |
| 514 | |
| 515 | pubKey->arena = arena; |
| 516 | pubKey->keyType = ecKey; |
| 517 | pubKey->pkcs11Slot = NULL((void*)0); |
| 518 | pubKey->pkcs11ID = CK_INVALID_HANDLE0; |
| 519 | |
| 520 | rv = SECITEM_MakeItem(pubKey->arena, &pubKey->u.ec.publicValue, |
| 521 | enc, encLen); |
| 522 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 523 | pubKey->u.ec.encoding = ECPoint_Undefined; |
| 524 | pubKey->u.ec.size = 0; |
| 525 | |
| 526 | oidData = SECOID_FindOIDByTagSECOID_FindOIDByTag_Util(cx->kemParams->oidTag); |
| 527 | CHECK_FAIL_ERR(!oidData, SEC_ERROR_INVALID_ALGORITHM)if ((!oidData)) { PORT_SetError_Util((SEC_ERROR_INVALID_ALGORITHM )); rv = SECFailure; goto cleanup; }; |
| 528 | |
| 529 | // Create parameters. |
| 530 | CHECK_FAIL(!SECITEM_AllocItem(pubKey->arena, &pubKey->u.ec.DEREncodedParams,if ((!SECITEM_AllocItem_Util(pubKey->arena, &pubKey-> u.ec.DEREncodedParams, 2 + oidData->oid.len))) { rv = SECFailure ; goto cleanup; } |
| 531 | 2 + oidData->oid.len))if ((!SECITEM_AllocItem_Util(pubKey->arena, &pubKey-> u.ec.DEREncodedParams, 2 + oidData->oid.len))) { rv = SECFailure ; goto cleanup; }; |
| 532 | |
| 533 | // Set parameters. |
| 534 | pubKey->u.ec.DEREncodedParams.data[0] = SEC_ASN1_OBJECT_ID0x06; |
| 535 | pubKey->u.ec.DEREncodedParams.data[1] = oidData->oid.len; |
| 536 | PORT_Memcpymemcpy(pubKey->u.ec.DEREncodedParams.data + 2, oidData->oid.data, oidData->oid.len); |
| 537 | *outPubKey = pubKey; |
| 538 | |
| 539 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,539)); cleanup: |
| 540 | if (rv != SECSuccess) { |
| 541 | SECKEY_DestroyPublicKey(pubKey); |
| 542 | } |
| 543 | return rv; |
| 544 | }; |
| 545 | |
| 546 | static SECStatus |
| 547 | pk11_hpke_CheckKeys(const HpkeContext *cx, const SECKEYPublicKey *pk, |
| 548 | const SECKEYPrivateKey *sk) |
| 549 | { |
| 550 | SECOidTag pkTag; |
| 551 | unsigned int i; |
| 552 | if (pk->keyType != ecKey || (sk && sk->keyType != ecKey)) { |
| 553 | PORT_SetErrorPORT_SetError_Util(SEC_ERROR_BAD_KEY); |
| 554 | return SECFailure; |
| 555 | } |
| 556 | pkTag = SECKEY_GetECCOid(&pk->u.ec.DEREncodedParams); |
| 557 | if (pkTag != cx->kemParams->oidTag) { |
| 558 | PORT_SetErrorPORT_SetError_Util(SEC_ERROR_BAD_KEY); |
| 559 | return SECFailure; |
| 560 | } |
| 561 | for (i = 0; i < PR_ARRAY_SIZE(kemParams)(sizeof(kemParams)/sizeof((kemParams)[0])); i++) { |
| 562 | if (cx->kemParams->oidTag == kemParams[i].oidTag) { |
| 563 | return SECSuccess; |
| 564 | } |
| 565 | } |
| 566 | |
| 567 | return SECFailure; |
| 568 | } |
| 569 | |
| 570 | static SECStatus |
| 571 | pk11_hpke_GenerateKeyPair(const HpkeContext *cx, SECKEYPublicKey **pkE, |
| 572 | SECKEYPrivateKey **skE) |
| 573 | { |
| 574 | SECStatus rv = SECSuccess; |
| 575 | SECKEYPrivateKey *privKey = NULL((void*)0); |
| 576 | SECKEYPublicKey *pubKey = NULL((void*)0); |
| 577 | SECOidData *oidData = NULL((void*)0); |
| 578 | SECKEYECParams ecp; |
| 579 | PK11SlotInfo *slot = NULL((void*)0); |
| 580 | ecp.data = NULL((void*)0); |
| 581 | PORT_Assert(cx && skE && pkE)((cx && skE && pkE)?((void)0):PR_Assert("cx && skE && pkE" ,"pk11hpke.c",581)); |
| 582 | |
| 583 | oidData = SECOID_FindOIDByTagSECOID_FindOIDByTag_Util(cx->kemParams->oidTag); |
| 584 | CHECK_FAIL_ERR(!oidData, SEC_ERROR_INVALID_ALGORITHM)if ((!oidData)) { PORT_SetError_Util((SEC_ERROR_INVALID_ALGORITHM )); rv = SECFailure; goto cleanup; }; |
| 585 | ecp.data = PORT_AllocPORT_Alloc_Util(2 + oidData->oid.len); |
| 586 | CHECK_FAIL(!ecp.data)if ((!ecp.data)) { rv = SECFailure; goto cleanup; }; |
| 587 | |
| 588 | ecp.len = 2 + oidData->oid.len; |
| 589 | ecp.type = siDEROID; |
| 590 | ecp.data[0] = SEC_ASN1_OBJECT_ID0x06; |
| 591 | ecp.data[1] = oidData->oid.len; |
| 592 | PORT_Memcpymemcpy(&ecp.data[2], oidData->oid.data, oidData->oid.len); |
| 593 | |
| 594 | slot = PK11_GetBestSlot(CKM_EC_KEY_PAIR_GEN0x00001040UL, NULL((void*)0)); |
| 595 | CHECK_FAIL(!slot)if ((!slot)) { rv = SECFailure; goto cleanup; }; |
| 596 | |
| 597 | privKey = PK11_GenerateKeyPair(slot, CKM_EC_KEY_PAIR_GEN0x00001040UL, &ecp, &pubKey, |
| 598 | PR_FALSE0, PR_TRUE1, NULL((void*)0)); |
| 599 | CHECK_FAIL_ERR((!privKey || !pubKey), SEC_ERROR_KEYGEN_FAIL)if (((!privKey || !pubKey))) { PORT_SetError_Util((SEC_ERROR_KEYGEN_FAIL )); rv = SECFailure; goto cleanup; }; |
| 600 | PORT_Assert(rv == SECSuccess)((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,600)); |
| 601 | *skE = privKey; |
| 602 | *pkE = pubKey; |
| 603 | |
| 604 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,604)); cleanup: |
| 605 | if (rv != SECSuccess) { |
| 606 | SECKEY_DestroyPrivateKey(privKey); |
| 607 | SECKEY_DestroyPublicKey(pubKey); |
| 608 | } |
| 609 | if (slot) { |
| 610 | PK11_FreeSlot(slot); |
| 611 | } |
| 612 | PORT_FreePORT_Free_Util(ecp.data); |
| 613 | return rv; |
| 614 | } |
| 615 | |
| 616 | static inline SECItem * |
| 617 | pk11_hpke_MakeExtractLabel(const char *prefix, unsigned int prefixLen, |
| 618 | const char *label, unsigned int labelLen, |
| 619 | const SECItem *suiteId, const SECItem *ikm) |
| 620 | { |
| 621 | SECItem *out = NULL((void*)0); |
| 622 | PRUint8 *walker; |
| 623 | out = SECITEM_AllocItemSECITEM_AllocItem_Util(NULL((void*)0), NULL((void*)0), prefixLen + labelLen + suiteId->len + (ikm ? ikm->len : 0)); |
| 624 | if (!out) { |
| 625 | return NULL((void*)0); |
| 626 | } |
| 627 | |
| 628 | walker = out->data; |
| 629 | PORT_Memcpymemcpy(walker, prefix, prefixLen); |
| 630 | walker += prefixLen; |
| 631 | PORT_Memcpymemcpy(walker, suiteId->data, suiteId->len); |
| 632 | walker += suiteId->len; |
| 633 | PORT_Memcpymemcpy(walker, label, labelLen); |
| 634 | walker += labelLen; |
| 635 | if (ikm && ikm->data) { |
| 636 | PORT_Memcpymemcpy(walker, ikm->data, ikm->len); |
| 637 | } |
| 638 | |
| 639 | return out; |
| 640 | } |
| 641 | |
| 642 | static SECStatus |
| 643 | pk11_hpke_LabeledExtractData(const HpkeContext *cx, SECItem *salt, |
| 644 | const SECItem *suiteId, const char *label, |
| 645 | unsigned int labelLen, const SECItem *ikm, SECItem **out) |
| 646 | { |
| 647 | SECStatus rv; |
| 648 | CK_HKDF_PARAMS params = { 0 }; |
| 649 | PK11SymKey *importedIkm = NULL((void*)0); |
| 650 | PK11SymKey *prk = NULL((void*)0); |
| 651 | PK11SlotInfo *slot = NULL((void*)0); |
| 652 | SECItem *borrowed; |
| 653 | SECItem *outDerived = NULL((void*)0); |
| 654 | SECItem *labeledIkm; |
| 655 | SECItem paramsItem = { siBuffer, (unsigned char *)¶ms, |
| 656 | sizeof(params) }; |
| 657 | PORT_Assert(cx && ikm && label && labelLen && out && suiteId)((cx && ikm && label && labelLen && out && suiteId)?((void)0):PR_Assert("cx && ikm && label && labelLen && out && suiteId" ,"pk11hpke.c",657)); |
| 658 | |
| 659 | labeledIkm = pk11_hpke_MakeExtractLabel(V1_LABEL, strlen(V1_LABEL), label, labelLen, suiteId, ikm); |
| 660 | CHECK_FAIL(!labeledIkm)if ((!labeledIkm)) { rv = SECFailure; goto cleanup; }; |
| 661 | params.bExtract = CK_TRUE1; |
| 662 | params.bExpand = CK_FALSE0; |
| 663 | params.prfHashMechanism = cx->kdfParams->mech; |
| 664 | params.ulSaltType = salt ? CKF_HKDF_SALT_DATA0x00000002UL : CKF_HKDF_SALT_NULL0x00000001UL; |
| 665 | params.pSalt = salt ? (CK_BYTE_PTR)salt->data : NULL((void*)0); |
| 666 | params.ulSaltLen = salt ? salt->len : 0; |
| 667 | params.pInfo = labeledIkm->data; |
| 668 | params.ulInfoLen = labeledIkm->len; |
| 669 | |
| 670 | slot = PK11_GetBestSlot(CKM_EC_KEY_PAIR_GEN0x00001040UL, NULL((void*)0)); |
| 671 | CHECK_FAIL(!slot)if ((!slot)) { rv = SECFailure; goto cleanup; }; |
| 672 | |
| 673 | importedIkm = PK11_ImportDataKey(slot, CKM_HKDF_DATA0x0000402bUL, PK11_OriginUnwrap, |
| 674 | CKA_DERIVE0x0000010CUL, labeledIkm, NULL((void*)0)); |
| 675 | CHECK_FAIL(!importedIkm)if ((!importedIkm)) { rv = SECFailure; goto cleanup; }; |
| 676 | prk = PK11_Derive(importedIkm, CKM_HKDF_DATA0x0000402bUL, ¶msItem, |
| 677 | CKM_HKDF_DERIVE0x0000402aUL, CKA_DERIVE0x0000010CUL, 0); |
| 678 | CHECK_FAIL(!prk)if ((!prk)) { rv = SECFailure; goto cleanup; }; |
| 679 | rv = PK11_ExtractKeyValue(prk); |
| 680 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 681 | borrowed = PK11_GetKeyData(prk); |
| 682 | CHECK_FAIL(!borrowed)if ((!borrowed)) { rv = SECFailure; goto cleanup; }; |
| 683 | outDerived = SECITEM_DupItemSECITEM_DupItem_Util(borrowed); |
| 684 | CHECK_FAIL(!outDerived)if ((!outDerived)) { rv = SECFailure; goto cleanup; }; |
| 685 | |
| 686 | *out = outDerived; |
| 687 | |
| 688 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,688)); cleanup: |
| 689 | PK11_FreeSymKey(importedIkm); |
| 690 | PK11_FreeSymKey(prk); |
| 691 | SECITEM_FreeItemSECITEM_FreeItem_Util(labeledIkm, PR_TRUE1); |
| 692 | if (slot) { |
| 693 | PK11_FreeSlot(slot); |
| 694 | } |
| 695 | return rv; |
| 696 | } |
| 697 | |
| 698 | static SECStatus |
| 699 | pk11_hpke_LabeledExtract(const HpkeContext *cx, PK11SymKey *salt, |
| 700 | const SECItem *suiteId, const char *label, CK_MECHANISM_TYPE hashMech, |
| 701 | unsigned int labelLen, PK11SymKey *ikm, PK11SymKey **out) |
| 702 | { |
| 703 | SECStatus rv = SECSuccess; |
| 704 | SECItem *innerLabel = NULL((void*)0); |
| 705 | PK11SymKey *labeledIkm = NULL((void*)0); |
| 706 | PK11SymKey *prk = NULL((void*)0); |
| 707 | CK_HKDF_PARAMS params = { 0 }; |
| 708 | CK_KEY_DERIVATION_STRING_DATA labelData; |
| 709 | SECItem labelDataItem = { siBuffer, NULL((void*)0), 0 }; |
| 710 | SECItem paramsItem = { siBuffer, (unsigned char *)¶ms, |
| 711 | sizeof(params) }; |
| 712 | PORT_Assert(cx && ikm && label && labelLen && out && suiteId)((cx && ikm && label && labelLen && out && suiteId)?((void)0):PR_Assert("cx && ikm && label && labelLen && out && suiteId" ,"pk11hpke.c",712)); |
| 713 | |
| 714 | innerLabel = pk11_hpke_MakeExtractLabel(V1_LABEL, strlen(V1_LABEL), label, labelLen, suiteId, NULL((void*)0)); |
| 715 | CHECK_FAIL(!innerLabel)if ((!innerLabel)) { rv = SECFailure; goto cleanup; }; |
| 716 | labelData.pData = innerLabel->data; |
| 717 | labelData.ulLen = innerLabel->len; |
| 718 | labelDataItem.data = (PRUint8 *)&labelData; |
| 719 | labelDataItem.len = sizeof(labelData); |
| 720 | labeledIkm = PK11_Derive(ikm, CKM_CONCATENATE_DATA_AND_BASE0x00000363UL, |
| 721 | &labelDataItem, CKM_GENERIC_SECRET_KEY_GEN0x00000350UL, CKA_DERIVE0x0000010CUL, 0); |
| 722 | CHECK_FAIL(!labeledIkm)if ((!labeledIkm)) { rv = SECFailure; goto cleanup; }; |
| 723 | |
| 724 | params.bExtract = CK_TRUE1; |
| 725 | params.bExpand = CK_FALSE0; |
| 726 | params.prfHashMechanism = hashMech; |
| 727 | params.ulSaltType = salt ? CKF_HKDF_SALT_KEY0x00000004UL : CKF_HKDF_SALT_NULL0x00000001UL; |
| 728 | params.hSaltKey = salt ? PK11_GetSymKeyHandle(salt) : CK_INVALID_HANDLE0; |
| 729 | |
| 730 | prk = PK11_Derive(labeledIkm, CKM_HKDF_DERIVE0x0000402aUL, ¶msItem, |
| 731 | CKM_HKDF_DERIVE0x0000402aUL, CKA_DERIVE0x0000010CUL, 0); |
| 732 | CHECK_FAIL(!prk)if ((!prk)) { rv = SECFailure; goto cleanup; }; |
| 733 | *out = prk; |
| 734 | |
| 735 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,735)); cleanup: |
| 736 | PK11_FreeSymKey(labeledIkm); |
| 737 | SECITEM_ZfreeItemSECITEM_ZfreeItem_Util(innerLabel, PR_TRUE1); |
| 738 | return rv; |
| 739 | } |
| 740 | |
| 741 | static SECStatus |
| 742 | pk11_hpke_LabeledExpand(const HpkeContext *cx, PK11SymKey *prk, const SECItem *suiteId, |
| 743 | const char *label, unsigned int labelLen, const SECItem *info, |
| 744 | unsigned int L, CK_MECHANISM_TYPE hashMech, PK11SymKey **outKey, |
| 745 | SECItem **outItem) |
| 746 | { |
| 747 | SECStatus rv = SECSuccess; |
| 748 | CK_MECHANISM_TYPE keyMech; |
| 749 | CK_MECHANISM_TYPE deriveMech; |
| 750 | CK_HKDF_PARAMS params = { 0 }; |
| 751 | PK11SymKey *derivedKey = NULL((void*)0); |
| 752 | SECItem *labeledInfoItem = NULL((void*)0); |
| 753 | SECItem paramsItem = { siBuffer, (unsigned char *)¶ms, |
| 754 | sizeof(params) }; |
| 755 | SECItem *derivedKeyData; |
| 756 | PRUint8 encodedL[2]; |
| 757 | PRUint8 *walker = encodedL; |
| 758 | size_t len; |
| 759 | PORT_Assert(cx && prk && label && (!!outKey != !!outItem))((cx && prk && label && (!!outKey != ! !outItem))?((void)0):PR_Assert("cx && prk && label && (!!outKey != !!outItem)" ,"pk11hpke.c",759)); |
| 760 | |
| 761 | walker = encodeNumber(L, walker, 2); |
| 762 | len = info ? info->len : 0; |
| 763 | len += sizeof(encodedL) + strlen(V1_LABEL) + suiteId->len + labelLen; |
| 764 | labeledInfoItem = SECITEM_AllocItemSECITEM_AllocItem_Util(NULL((void*)0), NULL((void*)0), len); |
| 765 | CHECK_FAIL(!labeledInfoItem)if ((!labeledInfoItem)) { rv = SECFailure; goto cleanup; }; |
| 766 | |
| 767 | walker = labeledInfoItem->data; |
| 768 | PORT_Memcpymemcpy(walker, encodedL, sizeof(encodedL)); |
| 769 | walker += sizeof(encodedL); |
| 770 | PORT_Memcpymemcpy(walker, V1_LABEL, strlen(V1_LABEL)); |
| 771 | walker += strlen(V1_LABEL); |
| 772 | PORT_Memcpymemcpy(walker, suiteId->data, suiteId->len); |
| 773 | walker += suiteId->len; |
| 774 | PORT_Memcpymemcpy(walker, label, labelLen); |
| 775 | walker += labelLen; |
| 776 | if (info) { |
| 777 | PORT_Memcpymemcpy(walker, info->data, info->len); |
| 778 | } |
| 779 | |
| 780 | params.bExtract = CK_FALSE0; |
| 781 | params.bExpand = CK_TRUE1; |
| 782 | params.prfHashMechanism = hashMech; |
| 783 | params.ulSaltType = CKF_HKDF_SALT_NULL0x00000001UL; |
| 784 | params.pInfo = labeledInfoItem->data; |
| 785 | params.ulInfoLen = labeledInfoItem->len; |
| 786 | deriveMech = outItem ? CKM_HKDF_DATA0x0000402bUL : CKM_HKDF_DERIVE0x0000402aUL; |
| 787 | /* If we're expanding to the encryption key use the appropriate mechanism. */ |
| 788 | keyMech = (label && !strcmp(KEY_LABEL, label)) ? cx->aeadParams->mech : CKM_HKDF_DERIVE0x0000402aUL; |
| 789 | |
| 790 | derivedKey = PK11_Derive(prk, deriveMech, ¶msItem, keyMech, CKA_DERIVE0x0000010CUL, L); |
| 791 | CHECK_FAIL(!derivedKey)if ((!derivedKey)) { rv = SECFailure; goto cleanup; }; |
| 792 | |
| 793 | if (outItem) { |
| 794 | /* Don't allow export of real keys. */ |
| 795 | CHECK_FAIL_ERR(deriveMech != CKM_HKDF_DATA, SEC_ERROR_LIBRARY_FAILURE)if ((deriveMech != 0x0000402bUL)) { PORT_SetError_Util((SEC_ERROR_LIBRARY_FAILURE )); rv = SECFailure; goto cleanup; }; |
| 796 | rv = PK11_ExtractKeyValue(derivedKey); |
| 797 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 798 | derivedKeyData = PK11_GetKeyData(derivedKey); |
| 799 | CHECK_FAIL_ERR((!derivedKeyData), SEC_ERROR_NO_KEY)if (((!derivedKeyData))) { PORT_SetError_Util((SEC_ERROR_NO_KEY )); rv = SECFailure; goto cleanup; }; |
| 800 | *outItem = SECITEM_DupItemSECITEM_DupItem_Util(derivedKeyData); |
| 801 | CHECK_FAIL(!*outItem)if ((!*outItem)) { rv = SECFailure; goto cleanup; }; |
| 802 | PK11_FreeSymKey(derivedKey); |
| 803 | } else { |
| 804 | *outKey = derivedKey; |
| 805 | } |
| 806 | |
| 807 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,807)); cleanup: |
| 808 | if (rv != SECSuccess) { |
| 809 | PK11_FreeSymKey(derivedKey); |
| 810 | } |
| 811 | SECITEM_ZfreeItemSECITEM_ZfreeItem_Util(labeledInfoItem, PR_TRUE1); |
| 812 | return rv; |
| 813 | } |
| 814 | |
| 815 | static SECStatus |
| 816 | pk11_hpke_ExtractAndExpand(const HpkeContext *cx, PK11SymKey *ikm, |
| 817 | const SECItem *kemContext, PK11SymKey **out) |
| 818 | { |
| 819 | SECStatus rv; |
| 820 | PK11SymKey *eaePrk = NULL((void*)0); |
| 821 | PK11SymKey *sharedSecret = NULL((void*)0); |
| 822 | PRUint8 suiteIdBuf[5]; |
| 823 | PRUint8 *walker; |
| 824 | PORT_Memcpymemcpy(suiteIdBuf, KEM_LABEL, strlen(KEM_LABEL)); |
| 825 | SECItem suiteIdItem = { siBuffer, suiteIdBuf, sizeof(suiteIdBuf) }; |
| 826 | PORT_Assert(cx && ikm && kemContext && out)((cx && ikm && kemContext && out)?((void )0):PR_Assert("cx && ikm && kemContext && out" ,"pk11hpke.c",826)); |
| 827 | |
| 828 | walker = &suiteIdBuf[3]; |
| 829 | walker = encodeNumber(cx->kemParams->id, walker, 2); |
Value stored to 'walker' is never read | |
| 830 | |
| 831 | rv = pk11_hpke_LabeledExtract(cx, NULL((void*)0), &suiteIdItem, EAE_PRK_LABEL, |
| 832 | cx->kemParams->hashMech, strlen(EAE_PRK_LABEL), |
| 833 | ikm, &eaePrk); |
| 834 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 835 | |
| 836 | rv = pk11_hpke_LabeledExpand(cx, eaePrk, &suiteIdItem, SH_SEC_LABEL, strlen(SH_SEC_LABEL), |
| 837 | kemContext, cx->kemParams->Nsecret, cx->kemParams->hashMech, |
| 838 | &sharedSecret, NULL((void*)0)); |
| 839 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 840 | *out = sharedSecret; |
| 841 | |
| 842 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,842)); cleanup: |
| 843 | if (rv != SECSuccess) { |
| 844 | PK11_FreeSymKey(sharedSecret); |
| 845 | } |
| 846 | PK11_FreeSymKey(eaePrk); |
| 847 | return rv; |
| 848 | } |
| 849 | |
| 850 | static SECStatus |
| 851 | pk11_hpke_Encap(HpkeContext *cx, const SECKEYPublicKey *pkE, SECKEYPrivateKey *skE, |
| 852 | SECKEYPublicKey *pkR) |
| 853 | { |
| 854 | SECStatus rv; |
| 855 | PK11SymKey *dh = NULL((void*)0); |
| 856 | SECItem *kemContext = NULL((void*)0); |
| 857 | SECItem *encPkR = NULL((void*)0); |
| 858 | unsigned int tmpLen; |
| 859 | |
| 860 | PORT_Assert(cx && skE && pkE && pkR)((cx && skE && pkE && pkR)?((void)0): PR_Assert("cx && skE && pkE && pkR","pk11hpke.c" ,860)); |
| 861 | |
| 862 | rv = pk11_hpke_CheckKeys(cx, pkE, skE); |
| 863 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 864 | rv = pk11_hpke_CheckKeys(cx, pkR, NULL((void*)0)); |
| 865 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 866 | |
| 867 | dh = PK11_PubDeriveWithKDF(skE, pkR, PR_FALSE0, NULL((void*)0), NULL((void*)0), CKM_ECDH1_DERIVE0x00001050UL, |
| 868 | CKM_SHA512_HMAC0x00000271UL /* unused */, CKA_DERIVE0x0000010CUL, 0, |
| 869 | CKD_NULL0x00000001UL, NULL((void*)0), NULL((void*)0)); |
| 870 | CHECK_FAIL(!dh)if ((!dh)) { rv = SECFailure; goto cleanup; }; |
| 871 | |
| 872 | /* Encapsulate our sender public key. Many use cases |
| 873 | * (including ECH) require that the application fetch |
| 874 | * this value, so do it once and store into the cx. */ |
| 875 | rv = PK11_HPKE_Serialize(pkE, NULL((void*)0), &tmpLen, 0); |
| 876 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 877 | cx->encapPubKey = SECITEM_AllocItemSECITEM_AllocItem_Util(NULL((void*)0), NULL((void*)0), tmpLen); |
| 878 | CHECK_FAIL(!cx->encapPubKey)if ((!cx->encapPubKey)) { rv = SECFailure; goto cleanup; }; |
| 879 | rv = PK11_HPKE_Serialize(pkE, cx->encapPubKey->data, |
| 880 | &cx->encapPubKey->len, cx->encapPubKey->len); |
| 881 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 882 | |
| 883 | rv = PK11_HPKE_Serialize(pkR, NULL((void*)0), &tmpLen, 0); |
| 884 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 885 | |
| 886 | kemContext = SECITEM_AllocItemSECITEM_AllocItem_Util(NULL((void*)0), NULL((void*)0), cx->encapPubKey->len + tmpLen); |
| 887 | CHECK_FAIL(!kemContext)if ((!kemContext)) { rv = SECFailure; goto cleanup; }; |
| 888 | |
| 889 | PORT_Memcpymemcpy(kemContext->data, cx->encapPubKey->data, cx->encapPubKey->len); |
| 890 | rv = PK11_HPKE_Serialize(pkR, &kemContext->data[cx->encapPubKey->len], &tmpLen, tmpLen); |
| 891 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 892 | |
| 893 | rv = pk11_hpke_ExtractAndExpand(cx, dh, kemContext, &cx->sharedSecret); |
| 894 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 895 | |
| 896 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,896)); cleanup: |
| 897 | if (rv != SECSuccess) { |
| 898 | PK11_FreeSymKey(cx->sharedSecret); |
| 899 | cx->sharedSecret = NULL((void*)0); |
| 900 | } |
| 901 | SECITEM_FreeItemSECITEM_FreeItem_Util(encPkR, PR_TRUE1); |
| 902 | SECITEM_FreeItemSECITEM_FreeItem_Util(kemContext, PR_TRUE1); |
| 903 | PK11_FreeSymKey(dh); |
| 904 | return rv; |
| 905 | } |
| 906 | |
| 907 | SECStatus |
| 908 | PK11_HPKE_ExportSecret(const HpkeContext *cx, const SECItem *info, unsigned int L, |
| 909 | PK11SymKey **out) |
| 910 | { |
| 911 | SECStatus rv; |
| 912 | PK11SymKey *exported; |
| 913 | PRUint8 suiteIdBuf[10]; |
| 914 | PRUint8 *walker; |
| 915 | PORT_Memcpymemcpy(suiteIdBuf, HPKE_LABEL, strlen(HPKE_LABEL)); |
| 916 | SECItem suiteIdItem = { siBuffer, suiteIdBuf, sizeof(suiteIdBuf) }; |
| 917 | |
| 918 | /* Arbitrary info length limit well under the specified max. */ |
| 919 | if (!cx || !info || (!info->data && info->len) || info->len > 0xFFFF || |
| 920 | !L || (L > 255 * cx->kdfParams->Nh)) { |
| 921 | PORT_SetErrorPORT_SetError_Util(SEC_ERROR_INVALID_ARGS); |
| 922 | return SECFailure; |
| 923 | } |
| 924 | |
| 925 | walker = &suiteIdBuf[4]; |
| 926 | walker = encodeNumber(cx->kemParams->id, walker, 2); |
| 927 | walker = encodeNumber(cx->kdfParams->id, walker, 2); |
| 928 | walker = encodeNumber(cx->aeadParams->id, walker, 2); |
| 929 | |
| 930 | rv = pk11_hpke_LabeledExpand(cx, cx->exporterSecret, &suiteIdItem, SEC_LABEL, |
| 931 | strlen(SEC_LABEL), info, L, cx->kdfParams->mech, |
| 932 | &exported, NULL((void*)0)); |
| 933 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 934 | *out = exported; |
| 935 | |
| 936 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,936)); cleanup: |
| 937 | return rv; |
| 938 | } |
| 939 | |
| 940 | static SECStatus |
| 941 | pk11_hpke_Decap(HpkeContext *cx, const SECKEYPublicKey *pkR, SECKEYPrivateKey *skR, |
| 942 | const SECItem *encS) |
| 943 | { |
| 944 | SECStatus rv; |
| 945 | PK11SymKey *dh = NULL((void*)0); |
| 946 | SECItem *encR = NULL((void*)0); |
| 947 | SECItem *kemContext = NULL((void*)0); |
| 948 | SECKEYPublicKey *pkS = NULL((void*)0); |
| 949 | unsigned int tmpLen; |
| 950 | |
| 951 | if (!cx || !skR || !pkR || !encS || !encS->data || !encS->len) { |
| 952 | PORT_SetErrorPORT_SetError_Util(SEC_ERROR_INVALID_ARGS); |
| 953 | return SECFailure; |
| 954 | } |
| 955 | |
| 956 | rv = PK11_HPKE_Deserialize(cx, encS->data, encS->len, &pkS); |
| 957 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 958 | |
| 959 | rv = pk11_hpke_CheckKeys(cx, pkR, skR); |
| 960 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 961 | rv = pk11_hpke_CheckKeys(cx, pkS, NULL((void*)0)); |
| 962 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 963 | |
| 964 | dh = PK11_PubDeriveWithKDF(skR, pkS, PR_FALSE0, NULL((void*)0), NULL((void*)0), CKM_ECDH1_DERIVE0x00001050UL, |
| 965 | CKM_SHA512_HMAC0x00000271UL /* unused */, CKA_DERIVE0x0000010CUL, 0, |
| 966 | CKD_NULL0x00000001UL, NULL((void*)0), NULL((void*)0)); |
| 967 | CHECK_FAIL(!dh)if ((!dh)) { rv = SECFailure; goto cleanup; }; |
| 968 | |
| 969 | /* kem_context = concat(enc, pkRm) */ |
| 970 | rv = PK11_HPKE_Serialize(pkR, NULL((void*)0), &tmpLen, 0); |
| 971 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 972 | |
| 973 | kemContext = SECITEM_AllocItemSECITEM_AllocItem_Util(NULL((void*)0), NULL((void*)0), encS->len + tmpLen); |
| 974 | CHECK_FAIL(!kemContext)if ((!kemContext)) { rv = SECFailure; goto cleanup; }; |
| 975 | |
| 976 | PORT_Memcpymemcpy(kemContext->data, encS->data, encS->len); |
| 977 | rv = PK11_HPKE_Serialize(pkR, &kemContext->data[encS->len], &tmpLen, |
| 978 | kemContext->len - encS->len); |
| 979 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 980 | rv = pk11_hpke_ExtractAndExpand(cx, dh, kemContext, &cx->sharedSecret); |
| 981 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 982 | |
| 983 | /* Store the sender serialized public key, which |
| 984 | * may be required by application use cases. */ |
| 985 | cx->encapPubKey = SECITEM_DupItemSECITEM_DupItem_Util(encS); |
| 986 | CHECK_FAIL(!cx->encapPubKey)if ((!cx->encapPubKey)) { rv = SECFailure; goto cleanup; }; |
| 987 | |
| 988 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,988)); cleanup: |
| 989 | if (rv != SECSuccess) { |
| 990 | PK11_FreeSymKey(cx->sharedSecret); |
| 991 | cx->sharedSecret = NULL((void*)0); |
| 992 | } |
| 993 | PK11_FreeSymKey(dh); |
| 994 | SECKEY_DestroyPublicKey(pkS); |
| 995 | SECITEM_FreeItemSECITEM_FreeItem_Util(encR, PR_TRUE1); |
| 996 | SECITEM_ZfreeItemSECITEM_ZfreeItem_Util(kemContext, PR_TRUE1); |
| 997 | return rv; |
| 998 | } |
| 999 | |
| 1000 | const SECItem * |
| 1001 | PK11_HPKE_GetEncapPubKey(const HpkeContext *cx) |
| 1002 | { |
| 1003 | if (!cx) { |
| 1004 | return NULL((void*)0); |
| 1005 | } |
| 1006 | return cx->encapPubKey; |
| 1007 | } |
| 1008 | |
| 1009 | static SECStatus |
| 1010 | pk11_hpke_KeySchedule(HpkeContext *cx, const SECItem *info) |
| 1011 | { |
| 1012 | SECStatus rv; |
| 1013 | SECItem contextItem = { siBuffer, NULL((void*)0), 0 }; |
| 1014 | unsigned int len; |
| 1015 | unsigned int off; |
| 1016 | PK11SymKey *secret = NULL((void*)0); |
| 1017 | SECItem *pskIdHash = NULL((void*)0); |
| 1018 | SECItem *infoHash = NULL((void*)0); |
| 1019 | PRUint8 suiteIdBuf[10]; |
| 1020 | PRUint8 *walker; |
| 1021 | PORT_Memcpymemcpy(suiteIdBuf, HPKE_LABEL, strlen(HPKE_LABEL)); |
| 1022 | SECItem suiteIdItem = { siBuffer, suiteIdBuf, sizeof(suiteIdBuf) }; |
| 1023 | PORT_Assert(cx && info && cx->psk && cx->pskId)((cx && info && cx->psk && cx-> pskId)?((void)0):PR_Assert("cx && info && cx->psk && cx->pskId" ,"pk11hpke.c",1023)); |
| 1024 | |
| 1025 | walker = &suiteIdBuf[4]; |
| 1026 | walker = encodeNumber(cx->kemParams->id, walker, 2); |
| 1027 | walker = encodeNumber(cx->kdfParams->id, walker, 2); |
| 1028 | walker = encodeNumber(cx->aeadParams->id, walker, 2); |
| 1029 | |
| 1030 | rv = pk11_hpke_LabeledExtractData(cx, NULL((void*)0), &suiteIdItem, PSK_ID_LABEL, |
| 1031 | strlen(PSK_ID_LABEL), cx->pskId, &pskIdHash); |
| 1032 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 1033 | rv = pk11_hpke_LabeledExtractData(cx, NULL((void*)0), &suiteIdItem, INFO_LABEL, |
| 1034 | strlen(INFO_LABEL), info, &infoHash); |
| 1035 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 1036 | |
| 1037 | // Make the context string |
| 1038 | len = sizeof(cx->mode) + pskIdHash->len + infoHash->len; |
| 1039 | CHECK_FAIL(!SECITEM_AllocItem(NULL, &contextItem, len))if ((!SECITEM_AllocItem_Util(((void*)0), &contextItem, len ))) { rv = SECFailure; goto cleanup; }; |
| 1040 | off = 0; |
| 1041 | PORT_Memcpymemcpy(&contextItem.data[off], &cx->mode, sizeof(cx->mode)); |
| 1042 | off += sizeof(cx->mode); |
| 1043 | PORT_Memcpymemcpy(&contextItem.data[off], pskIdHash->data, pskIdHash->len); |
| 1044 | off += pskIdHash->len; |
| 1045 | PORT_Memcpymemcpy(&contextItem.data[off], infoHash->data, infoHash->len); |
| 1046 | off += infoHash->len; |
| 1047 | |
| 1048 | // Compute the keys |
| 1049 | rv = pk11_hpke_LabeledExtract(cx, cx->sharedSecret, &suiteIdItem, SECRET_LABEL, |
| 1050 | cx->kdfParams->mech, strlen(SECRET_LABEL), |
| 1051 | cx->psk, &secret); |
| 1052 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 1053 | rv = pk11_hpke_LabeledExpand(cx, secret, &suiteIdItem, KEY_LABEL, strlen(KEY_LABEL), |
| 1054 | &contextItem, cx->aeadParams->Nk, cx->kdfParams->mech, |
| 1055 | &cx->key, NULL((void*)0)); |
| 1056 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 1057 | rv = pk11_hpke_LabeledExpand(cx, secret, &suiteIdItem, NONCE_LABEL, strlen(NONCE_LABEL), |
| 1058 | &contextItem, cx->aeadParams->Nn, cx->kdfParams->mech, |
| 1059 | NULL((void*)0), &cx->baseNonce); |
| 1060 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 1061 | rv = pk11_hpke_LabeledExpand(cx, secret, &suiteIdItem, EXP_LABEL, strlen(EXP_LABEL), |
| 1062 | &contextItem, cx->kdfParams->Nh, cx->kdfParams->mech, |
| 1063 | &cx->exporterSecret, NULL((void*)0)); |
| 1064 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 1065 | |
| 1066 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,1066)); cleanup: |
| 1067 | /* If !SECSuccess, callers will tear down the context. */ |
| 1068 | PK11_FreeSymKey(secret); |
| 1069 | SECITEM_FreeItemSECITEM_FreeItem_Util(&contextItem, PR_FALSE0); |
| 1070 | SECITEM_FreeItemSECITEM_FreeItem_Util(infoHash, PR_TRUE1); |
| 1071 | SECITEM_FreeItemSECITEM_FreeItem_Util(pskIdHash, PR_TRUE1); |
| 1072 | return rv; |
| 1073 | } |
| 1074 | |
| 1075 | SECStatus |
| 1076 | PK11_HPKE_SetupR(HpkeContext *cx, const SECKEYPublicKey *pkR, SECKEYPrivateKey *skR, |
| 1077 | const SECItem *enc, const SECItem *info) |
| 1078 | { |
| 1079 | SECStatus rv; |
| 1080 | SECItem empty = { siBuffer, NULL((void*)0), 0 }; |
| 1081 | |
| 1082 | CHECK_FAIL_ERR((!cx || !skR || !info || !enc || !enc->data || !enc->len),if (((!cx || !skR || !info || !enc || !enc->data || !enc-> len))) { PORT_SetError_Util((SEC_ERROR_INVALID_ARGS)); rv = SECFailure ; goto cleanup; } |
| 1083 | SEC_ERROR_INVALID_ARGS)if (((!cx || !skR || !info || !enc || !enc->data || !enc-> len))) { PORT_SetError_Util((SEC_ERROR_INVALID_ARGS)); rv = SECFailure ; goto cleanup; }; |
| 1084 | /* Already setup */ |
| 1085 | CHECK_FAIL_ERR((cx->aeadContext), SEC_ERROR_INVALID_STATE)if (((cx->aeadContext))) { PORT_SetError_Util((SEC_ERROR_INVALID_STATE )); rv = SECFailure; goto cleanup; }; |
| 1086 | |
| 1087 | rv = pk11_hpke_Decap(cx, pkR, skR, enc); |
| 1088 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 1089 | rv = pk11_hpke_KeySchedule(cx, info); |
| 1090 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 1091 | |
| 1092 | /* Store the key context for subsequent calls to Open(). |
| 1093 | * PK11_CreateContextBySymKey refs the key internally. */ |
| 1094 | PORT_Assert(cx->key)((cx->key)?((void)0):PR_Assert("cx->key","pk11hpke.c",1094 )); |
| 1095 | cx->aeadContext = PK11_CreateContextBySymKey(cx->aeadParams->mech, |
| 1096 | CKA_NSS_MESSAGE0x82000000L | CKA_DECRYPT0x00000105UL, |
| 1097 | cx->key, &empty); |
| 1098 | CHECK_FAIL_ERR((!cx->aeadContext), SEC_ERROR_LIBRARY_FAILURE)if (((!cx->aeadContext))) { PORT_SetError_Util((SEC_ERROR_LIBRARY_FAILURE )); rv = SECFailure; goto cleanup; }; |
| 1099 | |
| 1100 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,1100)); cleanup: |
| 1101 | if (rv != SECSuccess) { |
| 1102 | /* Clear everything past NewContext. */ |
| 1103 | PK11_HPKE_DestroyContext(cx, PR_FALSE0); |
| 1104 | } |
| 1105 | return rv; |
| 1106 | } |
| 1107 | |
| 1108 | SECStatus |
| 1109 | PK11_HPKE_SetupS(HpkeContext *cx, const SECKEYPublicKey *pkE, SECKEYPrivateKey *skE, |
| 1110 | SECKEYPublicKey *pkR, const SECItem *info) |
| 1111 | { |
| 1112 | SECStatus rv; |
| 1113 | SECItem empty = { siBuffer, NULL((void*)0), 0 }; |
| 1114 | SECKEYPublicKey *tmpPkE = NULL((void*)0); |
| 1115 | SECKEYPrivateKey *tmpSkE = NULL((void*)0); |
| 1116 | CHECK_FAIL_ERR((!cx || !pkR || !info || (!!skE != !!pkE)), SEC_ERROR_INVALID_ARGS)if (((!cx || !pkR || !info || (!!skE != !!pkE)))) { PORT_SetError_Util ((SEC_ERROR_INVALID_ARGS)); rv = SECFailure; goto cleanup; }; |
| 1117 | /* Already setup */ |
| 1118 | CHECK_FAIL_ERR((cx->aeadContext), SEC_ERROR_INVALID_STATE)if (((cx->aeadContext))) { PORT_SetError_Util((SEC_ERROR_INVALID_STATE )); rv = SECFailure; goto cleanup; }; |
| 1119 | |
| 1120 | /* If NULL was passed for the local keypair, generate one. */ |
| 1121 | if (skE == NULL((void*)0)) { |
| 1122 | rv = pk11_hpke_GenerateKeyPair(cx, &tmpPkE, &tmpSkE); |
| 1123 | if (rv != SECSuccess) { |
| 1124 | /* Code set */ |
| 1125 | return SECFailure; |
| 1126 | } |
| 1127 | rv = pk11_hpke_Encap(cx, tmpPkE, tmpSkE, pkR); |
| 1128 | } else { |
| 1129 | rv = pk11_hpke_Encap(cx, pkE, skE, pkR); |
| 1130 | } |
| 1131 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 1132 | |
| 1133 | SECItem defaultInfo = { siBuffer, NULL((void*)0), 0 }; |
| 1134 | if (!info || !info->data) { |
| 1135 | info = &defaultInfo; |
| 1136 | } |
| 1137 | rv = pk11_hpke_KeySchedule(cx, info); |
| 1138 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 1139 | |
| 1140 | PORT_Assert(cx->key)((cx->key)?((void)0):PR_Assert("cx->key","pk11hpke.c",1140 )); |
| 1141 | cx->aeadContext = PK11_CreateContextBySymKey(cx->aeadParams->mech, |
| 1142 | CKA_NSS_MESSAGE0x82000000L | CKA_ENCRYPT0x00000104UL, |
| 1143 | cx->key, &empty); |
| 1144 | CHECK_FAIL_ERR((!cx->aeadContext), SEC_ERROR_LIBRARY_FAILURE)if (((!cx->aeadContext))) { PORT_SetError_Util((SEC_ERROR_LIBRARY_FAILURE )); rv = SECFailure; goto cleanup; }; |
| 1145 | |
| 1146 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,1146)); cleanup: |
| 1147 | if (rv != SECSuccess) { |
| 1148 | /* Clear everything past NewContext. */ |
| 1149 | PK11_HPKE_DestroyContext(cx, PR_FALSE0); |
| 1150 | } |
| 1151 | SECKEY_DestroyPrivateKey(tmpSkE); |
| 1152 | SECKEY_DestroyPublicKey(tmpPkE); |
| 1153 | return rv; |
| 1154 | } |
| 1155 | |
| 1156 | SECStatus |
| 1157 | PK11_HPKE_Seal(HpkeContext *cx, const SECItem *aad, const SECItem *pt, |
| 1158 | SECItem **out) |
| 1159 | { |
| 1160 | SECStatus rv; |
| 1161 | PRUint8 ivOut[12] = { 0 }; |
| 1162 | SECItem *ct = NULL((void*)0); |
| 1163 | size_t maxOut; |
| 1164 | unsigned char tagBuf[HASH_LENGTH_MAX64]; |
| 1165 | size_t tagLen; |
| 1166 | unsigned int fixedBits; |
| 1167 | |
| 1168 | /* aad may be NULL, PT may be zero-length but not NULL. */ |
| 1169 | if (!cx || !cx->aeadContext || |
| 1170 | (aad && aad->len && !aad->data) || |
| 1171 | !pt || (pt->len && !pt->data) || |
| 1172 | !out) { |
| 1173 | PORT_SetErrorPORT_SetError_Util(SEC_ERROR_INVALID_ARGS); |
| 1174 | return SECFailure; |
| 1175 | } |
| 1176 | |
| 1177 | PORT_Assert(cx->baseNonce->len == sizeof(ivOut))((cx->baseNonce->len == sizeof(ivOut))?((void)0):PR_Assert ("cx->baseNonce->len == sizeof(ivOut)","pk11hpke.c",1177 )); |
| 1178 | PORT_Memcpymemcpy(ivOut, cx->baseNonce->data, cx->baseNonce->len); |
| 1179 | |
| 1180 | tagLen = cx->aeadParams->tagLen; |
| 1181 | maxOut = pt->len + tagLen; |
| 1182 | fixedBits = (cx->baseNonce->len - 8) * 8; |
| 1183 | ct = SECITEM_AllocItemSECITEM_AllocItem_Util(NULL((void*)0), NULL((void*)0), maxOut); |
| 1184 | CHECK_FAIL(!ct)if ((!ct)) { rv = SECFailure; goto cleanup; }; |
| 1185 | |
| 1186 | rv = PK11_AEADOp(cx->aeadContext, |
| 1187 | CKG_GENERATE_COUNTER_XOR0x00000004UL, fixedBits, |
| 1188 | ivOut, sizeof(ivOut), |
| 1189 | aad ? aad->data : NULL((void*)0), |
| 1190 | aad ? aad->len : 0, |
| 1191 | ct->data, (int *)&ct->len, maxOut, |
| 1192 | tagBuf, tagLen, |
| 1193 | pt->data, pt->len); |
| 1194 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 1195 | CHECK_FAIL_ERR((ct->len > maxOut - tagLen), SEC_ERROR_LIBRARY_FAILURE)if (((ct->len > maxOut - tagLen))) { PORT_SetError_Util ((SEC_ERROR_LIBRARY_FAILURE)); rv = SECFailure; goto cleanup; }; |
| 1196 | |
| 1197 | /* Append the tag to the ciphertext. */ |
| 1198 | PORT_Memcpymemcpy(&ct->data[ct->len], tagBuf, tagLen); |
| 1199 | ct->len += tagLen; |
| 1200 | *out = ct; |
| 1201 | |
| 1202 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,1202)); cleanup: |
| 1203 | if (rv != SECSuccess) { |
| 1204 | SECITEM_ZfreeItemSECITEM_ZfreeItem_Util(ct, PR_TRUE1); |
| 1205 | } |
| 1206 | return rv; |
| 1207 | } |
| 1208 | |
| 1209 | /* PKCS #11 defines the IV generator function to be ignored on |
| 1210 | * decrypt (i.e. it uses the nonce input, as provided, as the IV). |
| 1211 | * The sequence number is kept independently on each endpoint and |
| 1212 | * the XORed IV is not transmitted, so we have to do our own IV |
| 1213 | * construction XOR outside of the token. */ |
| 1214 | static SECStatus |
| 1215 | pk11_hpke_makeIv(HpkeContext *cx, PRUint8 *iv, size_t ivLen) |
| 1216 | { |
| 1217 | unsigned int counterLen = sizeof(cx->sequenceNumber); |
| 1218 | PORT_Assert(cx->baseNonce->len == ivLen)((cx->baseNonce->len == ivLen)?((void)0):PR_Assert("cx->baseNonce->len == ivLen" ,"pk11hpke.c",1218)); |
| 1219 | PORT_Assert(counterLen == 8)((counterLen == 8)?((void)0):PR_Assert("counterLen == 8","pk11hpke.c" ,1219)); |
| 1220 | if (cx->sequenceNumber == PR_UINT64(0xffffffffffffffff)0xffffffffffffffffUL) { |
| 1221 | /* Overflow */ |
| 1222 | PORT_SetErrorPORT_SetError_Util(SEC_ERROR_INVALID_KEY); |
| 1223 | return SECFailure; |
| 1224 | } |
| 1225 | |
| 1226 | PORT_Memcpymemcpy(iv, cx->baseNonce->data, cx->baseNonce->len); |
| 1227 | for (size_t i = 0; i < counterLen; i++) { |
| 1228 | iv[cx->baseNonce->len - 1 - i] ^= |
| 1229 | PORT_GET_BYTE_BE(cx->sequenceNumber,((unsigned char)(((counterLen) - (counterLen - 1 - i)-1) >= sizeof(cx->sequenceNumber) ? 0 : (((cx->sequenceNumber ) >> (((counterLen) - (counterLen - 1 - i)-1) * 8)) & 0xff))) |
| 1230 | counterLen - 1 - i, counterLen)((unsigned char)(((counterLen) - (counterLen - 1 - i)-1) >= sizeof(cx->sequenceNumber) ? 0 : (((cx->sequenceNumber ) >> (((counterLen) - (counterLen - 1 - i)-1) * 8)) & 0xff))); |
| 1231 | } |
| 1232 | return SECSuccess; |
| 1233 | } |
| 1234 | |
| 1235 | SECStatus |
| 1236 | PK11_HPKE_Open(HpkeContext *cx, const SECItem *aad, |
| 1237 | const SECItem *ct, SECItem **out) |
| 1238 | { |
| 1239 | SECStatus rv; |
| 1240 | PRUint8 constructedNonce[12] = { 0 }; |
| 1241 | unsigned int tagLen; |
| 1242 | SECItem *pt = NULL((void*)0); |
| 1243 | |
| 1244 | /* aad may be NULL, CT may be zero-length but not NULL. */ |
| 1245 | if ((!cx || !cx->aeadContext || !ct || !out) || |
| 1246 | (aad && aad->len && !aad->data) || |
| 1247 | (!ct->data || (ct->data && !ct->len))) { |
| 1248 | PORT_SetErrorPORT_SetError_Util(SEC_ERROR_INVALID_ARGS); |
| 1249 | return SECFailure; |
| 1250 | } |
| 1251 | tagLen = cx->aeadParams->tagLen; |
| 1252 | CHECK_FAIL_ERR((ct->len < tagLen), SEC_ERROR_INVALID_ARGS)if (((ct->len < tagLen))) { PORT_SetError_Util((SEC_ERROR_INVALID_ARGS )); rv = SECFailure; goto cleanup; }; |
| 1253 | |
| 1254 | pt = SECITEM_AllocItemSECITEM_AllocItem_Util(NULL((void*)0), NULL((void*)0), ct->len); |
| 1255 | CHECK_FAIL(!pt)if ((!pt)) { rv = SECFailure; goto cleanup; }; |
| 1256 | |
| 1257 | rv = pk11_hpke_makeIv(cx, constructedNonce, sizeof(constructedNonce)); |
| 1258 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 1259 | |
| 1260 | rv = PK11_AEADOp(cx->aeadContext, CKG_NO_GENERATE0x00000000UL, 0, |
| 1261 | constructedNonce, sizeof(constructedNonce), |
| 1262 | aad ? aad->data : NULL((void*)0), |
| 1263 | aad ? aad->len : 0, |
| 1264 | pt->data, (int *)&pt->len, pt->len, |
| 1265 | &ct->data[ct->len - tagLen], tagLen, |
| 1266 | ct->data, ct->len - tagLen); |
| 1267 | CHECK_RV(rv)if ((rv) != SECSuccess) { goto cleanup; }; |
| 1268 | cx->sequenceNumber++; |
| 1269 | *out = pt; |
| 1270 | |
| 1271 | CLEANUP((rv == SECSuccess)?((void)0):PR_Assert("rv == SECSuccess","pk11hpke.c" ,1271)); cleanup: |
| 1272 | if (rv != SECSuccess) { |
| 1273 | SECITEM_ZfreeItemSECITEM_ZfreeItem_Util(pt, PR_TRUE1); |
| 1274 | } |
| 1275 | return rv; |
| 1276 | } |