diff options
Diffstat (limited to 'security/nss/lib/smime/cmsudf.c')
| -rw-r--r-- | security/nss/lib/smime/cmsudf.c | 440 |
1 files changed, 440 insertions, 0 deletions
diff --git a/security/nss/lib/smime/cmsudf.c b/security/nss/lib/smime/cmsudf.c new file mode 100644 index 000000000..3ef4268d4 --- /dev/null +++ b/security/nss/lib/smime/cmsudf.c @@ -0,0 +1,440 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +/* + * CMS User Define Types + */ + +#include "cmslocal.h" + +#include "prinit.h" +#include "pk11func.h" +#include "secitem.h" +#include "secoid.h" +#include "secerr.h" +#include "nss.h" + +typedef struct nsscmstypeInfoStr nsscmstypeInfo; +struct nsscmstypeInfoStr { + SECOidTag type; + SEC_ASN1Template *template; + size_t size; + PRBool isData; + NSSCMSGenericWrapperDataDestroy destroy; + NSSCMSGenericWrapperDataCallback decode_before; + NSSCMSGenericWrapperDataCallback decode_after; + NSSCMSGenericWrapperDataCallback decode_end; + NSSCMSGenericWrapperDataCallback encode_start; + NSSCMSGenericWrapperDataCallback encode_before; + NSSCMSGenericWrapperDataCallback encode_after; +}; + +/* make sure the global tables are only initialized once */ +static PRCallOnceType nsscmstypeOnce; +static PRCallOnceType nsscmstypeClearOnce; +/* lock for adding a new entry */ +static PRLock *nsscmstypeAddLock; +/* lock for the hash table */ +static PRLock *nsscmstypeHashLock; +/* the hash table itself */ +static PLHashTable *nsscmstypeHash; +/* arena to hold all the hash table data */ +static PLArenaPool *nsscmstypeArena; + +/* + * clean up our global tables + */ +SECStatus +nss_cmstype_shutdown(void *appData, void *reserved) +{ + if (nsscmstypeHashLock) { + PR_Lock(nsscmstypeHashLock); + } + if (nsscmstypeHash) { + PL_HashTableDestroy(nsscmstypeHash); + nsscmstypeHash = NULL; + } + if (nsscmstypeArena) { + PORT_FreeArena(nsscmstypeArena, PR_FALSE); + nsscmstypeArena = NULL; + } + if (nsscmstypeAddLock) { + PR_DestroyLock(nsscmstypeAddLock); + } + if (nsscmstypeHashLock) { + PRLock *oldLock = nsscmstypeHashLock; + nsscmstypeHashLock = NULL; + PR_Unlock(oldLock); + PR_DestroyLock(oldLock); + } + + /* don't clear out the PR_ONCE data if we failed our inital call */ + if (appData == NULL) { + nsscmstypeOnce = nsscmstypeClearOnce; + } + return SECSuccess; +} + +static PLHashNumber +nss_cmstype_hash_key(const void *key) +{ + return (PLHashNumber)((char *)key - (char *)NULL); +} + +static PRIntn +nss_cmstype_compare_keys(const void *v1, const void *v2) +{ + PLHashNumber value1 = nss_cmstype_hash_key(v1); + PLHashNumber value2 = nss_cmstype_hash_key(v2); + + return (value1 == value2); +} + +/* + * initialize our hash tables, called once on the first attemat to register + * a new SMIME type. + */ +static PRStatus +nss_cmstype_init(void) +{ + SECStatus rv; + + nsscmstypeHashLock = PR_NewLock(); + if (nsscmstypeHashLock == NULL) { + return PR_FAILURE; + } + nsscmstypeAddLock = PR_NewLock(); + if (nsscmstypeHashLock == NULL) { + goto fail; + } + nsscmstypeHash = PL_NewHashTable(64, nss_cmstype_hash_key, + nss_cmstype_compare_keys, + PL_CompareValues, NULL, NULL); + if (nsscmstypeHash == NULL) { + goto fail; + } + nsscmstypeArena = PORT_NewArena(2048); + if (nsscmstypeArena == NULL) { + goto fail; + } + rv = NSS_RegisterShutdown(nss_cmstype_shutdown, NULL); + if (rv != SECSuccess) { + goto fail; + } + return PR_SUCCESS; + +fail: + nss_cmstype_shutdown(&nsscmstypeOnce, NULL); + return PR_FAILURE; +} + +/* + * look up and registered SIME type + */ +static const nsscmstypeInfo * +nss_cmstype_lookup(SECOidTag type) +{ + nsscmstypeInfo *typeInfo = NULL; + ; + if (!nsscmstypeHash) { + return NULL; + } + PR_Lock(nsscmstypeHashLock); + if (nsscmstypeHash) { + typeInfo = PL_HashTableLookupConst(nsscmstypeHash, (void *)type); + } + PR_Unlock(nsscmstypeHashLock); + return typeInfo; +} + +/* + * add a new type to the SMIME type table + */ +static SECStatus +nss_cmstype_add(SECOidTag type, nsscmstypeInfo *typeinfo) +{ + PLHashEntry *entry; + + if (!nsscmstypeHash) { + /* assert? this shouldn't happen */ + return SECFailure; + } + PR_Lock(nsscmstypeHashLock); + /* this is really paranoia. If we really are racing nsscmstypeHash, we'll + * also be racing nsscmstypeHashLock... */ + if (!nsscmstypeHash) { + PR_Unlock(nsscmstypeHashLock); + return SECFailure; + } + entry = PL_HashTableAdd(nsscmstypeHash, (void *)type, typeinfo); + PR_Unlock(nsscmstypeHashLock); + return entry ? SECSuccess : SECFailure; +} + +/* helper functions to manage new content types + */ + +PRBool +NSS_CMSType_IsWrapper(SECOidTag type) +{ + const nsscmstypeInfo *typeInfo = NULL; + + switch (type) { + case SEC_OID_PKCS7_SIGNED_DATA: + case SEC_OID_PKCS7_ENVELOPED_DATA: + case SEC_OID_PKCS7_DIGESTED_DATA: + case SEC_OID_PKCS7_ENCRYPTED_DATA: + return PR_TRUE; + default: + typeInfo = nss_cmstype_lookup(type); + if (typeInfo && !typeInfo->isData) { + return PR_TRUE; + } + } + return PR_FALSE; +} + +PRBool +NSS_CMSType_IsData(SECOidTag type) +{ + const nsscmstypeInfo *typeInfo = NULL; + + switch (type) { + case SEC_OID_PKCS7_DATA: + return PR_TRUE; + default: + typeInfo = nss_cmstype_lookup(type); + if (typeInfo && typeInfo->isData) { + return PR_TRUE; + } + } + return PR_FALSE; +} + +const SEC_ASN1Template * +NSS_CMSType_GetTemplate(SECOidTag type) +{ + const nsscmstypeInfo *typeInfo = nss_cmstype_lookup(type); + + if (typeInfo && typeInfo->template) { + return typeInfo->template; + } + return SEC_ASN1_GET(SEC_PointerToOctetStringTemplate); +} + +size_t +NSS_CMSType_GetContentSize(SECOidTag type) +{ + const nsscmstypeInfo *typeInfo = nss_cmstype_lookup(type); + + if (typeInfo) { + return typeInfo->size; + } + return sizeof(SECItem *); +} + +void +NSS_CMSGenericWrapperData_Destroy(SECOidTag type, NSSCMSGenericWrapperData *gd) +{ + const nsscmstypeInfo *typeInfo = nss_cmstype_lookup(type); + + if (typeInfo && typeInfo->destroy) { + (*typeInfo->destroy)(gd); + } +} + +SECStatus +NSS_CMSGenericWrapperData_Decode_BeforeData(SECOidTag type, + NSSCMSGenericWrapperData *gd) +{ + const nsscmstypeInfo *typeInfo; + + /* short cut common case */ + if (type == SEC_OID_PKCS7_DATA) { + return SECSuccess; + } + + typeInfo = nss_cmstype_lookup(type); + if (typeInfo) { + if (typeInfo->decode_before) { + return (*typeInfo->decode_before)(gd); + } + /* decoder ops optional for data tags */ + if (typeInfo->isData) { + return SECSuccess; + } + } + /* expected a function, but none existed */ + return SECFailure; +} + +SECStatus +NSS_CMSGenericWrapperData_Decode_AfterData(SECOidTag type, + NSSCMSGenericWrapperData *gd) +{ + const nsscmstypeInfo *typeInfo; + + /* short cut common case */ + if (type == SEC_OID_PKCS7_DATA) { + return SECSuccess; + } + + typeInfo = nss_cmstype_lookup(type); + if (typeInfo) { + if (typeInfo->decode_after) { + return (*typeInfo->decode_after)(gd); + } + /* decoder ops optional for data tags */ + if (typeInfo->isData) { + return SECSuccess; + } + } + /* expected a function, but none existed */ + return SECFailure; +} + +SECStatus +NSS_CMSGenericWrapperData_Decode_AfterEnd(SECOidTag type, + NSSCMSGenericWrapperData *gd) +{ + const nsscmstypeInfo *typeInfo; + + /* short cut common case */ + if (type == SEC_OID_PKCS7_DATA) { + return SECSuccess; + } + + typeInfo = nss_cmstype_lookup(type); + if (typeInfo) { + if (typeInfo->decode_end) { + return (*typeInfo->decode_end)(gd); + } + /* decoder ops optional for data tags */ + if (typeInfo->isData) { + return SECSuccess; + } + } + /* expected a function, but none existed */ + return SECFailure; +} + +SECStatus +NSS_CMSGenericWrapperData_Encode_BeforeStart(SECOidTag type, + NSSCMSGenericWrapperData *gd) +{ + const nsscmstypeInfo *typeInfo; + + /* short cut common case */ + if (type == SEC_OID_PKCS7_DATA) { + return SECSuccess; + } + + typeInfo = nss_cmstype_lookup(type); + if (typeInfo) { + if (typeInfo->encode_start) { + return (*typeInfo->encode_start)(gd); + } + /* decoder ops optional for data tags */ + if (typeInfo->isData) { + return SECSuccess; + } + } + /* expected a function, but none existed */ + return SECFailure; +} + +SECStatus +NSS_CMSGenericWrapperData_Encode_BeforeData(SECOidTag type, + NSSCMSGenericWrapperData *gd) +{ + const nsscmstypeInfo *typeInfo; + + /* short cut common case */ + if (type == SEC_OID_PKCS7_DATA) { + return SECSuccess; + } + + typeInfo = nss_cmstype_lookup(type); + if (typeInfo) { + if (typeInfo->encode_before) { + return (*typeInfo->encode_before)(gd); + } + /* decoder ops optional for data tags */ + if (typeInfo->isData) { + return SECSuccess; + } + } + /* expected a function, but none existed */ + return SECFailure; +} + +SECStatus +NSS_CMSGenericWrapperData_Encode_AfterData(SECOidTag type, + NSSCMSGenericWrapperData *gd) +{ + const nsscmstypeInfo *typeInfo; + + /* short cut common case */ + if (type == SEC_OID_PKCS7_DATA) { + return SECSuccess; + } + + typeInfo = nss_cmstype_lookup(type); + if (typeInfo) { + if (typeInfo->encode_after) { + return (*typeInfo->encode_after)(gd); + } + /* decoder ops optional for data tags */ + if (typeInfo->isData) { + return SECSuccess; + } + } + /* expected a function, but none existed */ + return SECFailure; +} + +SECStatus +NSS_CMSType_RegisterContentType(SECOidTag type, + SEC_ASN1Template *asn1Template, size_t size, + NSSCMSGenericWrapperDataDestroy destroy, + NSSCMSGenericWrapperDataCallback decode_before, + NSSCMSGenericWrapperDataCallback decode_after, + NSSCMSGenericWrapperDataCallback decode_end, + NSSCMSGenericWrapperDataCallback encode_start, + NSSCMSGenericWrapperDataCallback encode_before, + NSSCMSGenericWrapperDataCallback encode_after, + PRBool isData) +{ + PRStatus rc; + SECStatus rv; + nsscmstypeInfo *typeInfo; + const nsscmstypeInfo *exists; + + rc = PR_CallOnce(&nsscmstypeOnce, nss_cmstype_init); + if (rc == PR_FAILURE) { + return SECFailure; + } + PR_Lock(nsscmstypeAddLock); + exists = nss_cmstype_lookup(type); + if (exists) { + PR_Unlock(nsscmstypeAddLock); + /* already added */ + return SECSuccess; + } + typeInfo = PORT_ArenaNew(nsscmstypeArena, nsscmstypeInfo); + typeInfo->type = type; + typeInfo->size = size; + typeInfo->isData = isData; + typeInfo->template = asn1Template; + typeInfo->destroy = destroy; + typeInfo->decode_before = decode_before; + typeInfo->decode_after = decode_after; + typeInfo->decode_end = decode_end; + typeInfo->encode_start = encode_start; + typeInfo->encode_before = encode_before; + typeInfo->encode_after = encode_after; + rv = nss_cmstype_add(type, typeInfo); + PR_Unlock(nsscmstypeAddLock); + return rv; +} |