+++ /dev/null
-//
-// SecOTRPacketData.h
-// libsecurity_libSecOTR
-//
-// Created by Mitch Adler on 2/26/11.
-// Copyright 2011 Apple Inc. All rights reserved.
-//
-
-#ifndef _SECOTRPACKETDATA_H_
-#define _SECOTRPACKETDATA_H_
-
-#include <CoreFoundation/CFBase.h>
-#include <CoreFoundation/CFRuntime.h>
-#include <CoreFoundation/CFData.h>
-
-#include <corecrypto/ccn.h>
-
-#include <CommonCrypto/CommonDigest.h>
-
-#include <Security/SecBase.h>
-
-#include <utilities/SecCFWrappers.h>
-#include <Security/SecOTRPackets.h>
-
-#include <AssertMacros.h>
-
-__BEGIN_DECLS
-
-static OSStatus ReadAndVerifyByte(const uint8_t**bytes, size_t*size, uint8_t expected);
-static OSStatus ReadAndVerifyShort(const uint8_t**bytes, size_t*size, uint16_t expected);
-static OSStatus ReadAndVerifyMessageType(const uint8_t**bytes, size_t*size, OTRMessageType expected);
-
-static OSStatus SizeAndSkipDATA(const uint8_t **bytes, size_t *size,
- const uint8_t **dataBytes, size_t *dataSize);
-static OSStatus SizeAndSkipMPI(const uint8_t **bytes, size_t *size,
- const uint8_t **mpiBytes, size_t *mpiSize);
-
-
-static OSStatus ReadLongLong(const uint8_t**bytesPtr, size_t*sizePtr, uint64_t* value);
-static OSStatus ReadLong(const uint8_t**bytesPtr, size_t*sizePtr, uint32_t* value);
-static OSStatus ReadShort(const uint8_t**bytesPtr, size_t*sizePtr, uint16_t* value);
-static OSStatus ReadByte(const uint8_t**bytesPtr, size_t*sizePtr, uint8_t* value);
-static OSStatus ReadMessageType(const uint8_t**bytesPtr, size_t*sizePtr, OTRMessageType* type);
-static OSStatus ReadMPI(const uint8_t**bytesPtr, size_t*sizePtr, cc_size n, cc_unit *x);
-static OSStatus ReadDATA(const uint8_t**bytesPtr, size_t*sizePtr, size_t* dataSize, uint8_t* data);
-static OSStatus CreatePublicKey(const uint8_t**bytesPtr, size_t*sizePtr, SecOTRPublicIdentityRef* publicId);
-static CFMutableDataRef CFDataCreateMutableFromOTRDATA(CFAllocatorRef allocator, const uint8_t**bytesPtr, size_t*sizePtr);
-
-static void AppendLongLong(CFMutableDataRef appendTo, uint64_t value);
-static void AppendLong(CFMutableDataRef appendTo, uint32_t value);
-static void AppendShort(CFMutableDataRef appendTo, uint16_t value);
-static void AppendByte(CFMutableDataRef appendTo, uint8_t type);
-static void AppendMessageType(CFMutableDataRef appendTo, OTRMessageType type);
-static void AppendMPI(CFMutableDataRef appendTo, cc_size n, const cc_unit *x);
-static void AppendDATA(CFMutableDataRef appendTo, size_t size, const uint8_t*data);
-static void AppendPublicKey(CFMutableDataRef appendTo, SecOTRPublicIdentityRef publicId);
-
-
-//
-// Inline implementation
-//
-
-static uint16_t kCurrentOTRVersion = 0x2;
-
-static inline OSStatus ReadLongLong(const uint8_t**bytesPtr, size_t*sizePtr, uint64_t* value)
-{
- require(bytesPtr != NULL, fail);
- require(sizePtr != NULL, fail);
- require(value != NULL, fail);
- require(*sizePtr >= 4, fail);
-
- *value = ((uint64_t)(*bytesPtr)[0]) << 56 |
- ((uint64_t)(*bytesPtr)[1]) << 48 |
- ((uint64_t)(*bytesPtr)[2]) << 40 |
- ((uint64_t)(*bytesPtr)[3]) << 32 |
- ((uint64_t)(*bytesPtr)[4]) << 24 |
- ((uint64_t)(*bytesPtr)[5]) << 16 |
- ((uint64_t)(*bytesPtr)[6]) << 8 |
- ((uint64_t)(*bytesPtr)[7]) << 0;
-
- *bytesPtr += 8;
- *sizePtr -= 8;
-
- return errSecSuccess;
-fail:
- return errSecParam;
-}
-
-static inline OSStatus ReadLong(const uint8_t**bytesPtr, size_t*sizePtr, uint32_t* value)
-{
- require(bytesPtr != NULL, fail);
- require(sizePtr != NULL, fail);
- require(value != NULL, fail);
- require(*sizePtr >= 4, fail);
-
- *value = (uint32_t)(*bytesPtr)[0] << 24 |
- (uint32_t)(*bytesPtr)[1] << 16 |
- (uint32_t)(*bytesPtr)[2] << 8 |
- (uint32_t)(*bytesPtr)[3] << 0;
-
- *bytesPtr += 4;
- *sizePtr -= 4;
-
- return errSecSuccess;
-fail:
- return errSecParam;
-}
-
-static inline OSStatus ReadShort(const uint8_t**bytesPtr, size_t*sizePtr, uint16_t* value)
-{
- require(bytesPtr != NULL, fail);
- require(sizePtr != NULL, fail);
- require(value != NULL, fail);
- require(*sizePtr >= 2, fail);
-
- *value = (*bytesPtr)[0] << 8 |
- (*bytesPtr)[1] << 0;
-
- *bytesPtr += 2;
- *sizePtr -= 2;
-
- return errSecSuccess;
-fail:
- return errSecParam;
-}
-
-static inline OSStatus ReadByte(const uint8_t**bytesPtr, size_t*sizePtr, uint8_t* value)
-{
- require(bytesPtr != NULL, fail);
- require(sizePtr != NULL, fail);
- require(value != NULL, fail);
- require(*sizePtr >= 1, fail);
-
- *value = *bytesPtr[0];
-
- *bytesPtr += 1;
- *sizePtr -= 1;
-
- return errSecSuccess;
-fail:
- return errSecParam;
-}
-
-static inline OSStatus ReadMessageType(const uint8_t**bytesPtr, size_t*sizePtr, OTRMessageType* type)
-{
- OSStatus result = errSecParam;
- uint8_t value;
-
- require(type != NULL, fail);
- require_noerr(result = ReadByte(bytesPtr, sizePtr, &value), fail);
-
- *type = value;
-fail:
- return result;
-}
-
-static inline OSStatus ReadMPI(const uint8_t**bytesPtr, size_t*sizePtr, cc_size n, cc_unit *x)
-{
- require(bytesPtr != NULL, fail);
- require(sizePtr != NULL, fail);
- require(x != NULL, fail);
- require(*sizePtr >= 5, fail);
-
- uint32_t mpiLength;
-
- ReadLong(bytesPtr, sizePtr, &mpiLength);
-
- require(mpiLength <= *sizePtr, fail);
-
- ccn_read_uint(n, x, mpiLength, *bytesPtr);
-
- *bytesPtr += mpiLength;
- *sizePtr -= mpiLength;
-
- return errSecSuccess;
-fail:
- return errSecParam;
-
-}
-
-static inline OSStatus ReadDATA(const uint8_t**bytesPtr, size_t*sizePtr, size_t* dataSize, uint8_t* data)
-{
- require(bytesPtr != NULL, fail);
- require(sizePtr != NULL, fail);
- require(data != NULL, fail);
- require(*sizePtr >= 5, fail);
-
- uint32_t dataLength;
-
- ReadLong(bytesPtr, sizePtr, &dataLength);
-
- require(dataLength <= *sizePtr, fail);
- memmove(data, bytesPtr, dataLength);
-
- *bytesPtr += dataLength;
- *sizePtr -= dataLength;
-
- *dataSize = dataLength;
-
- return errSecSuccess;
-fail:
- return errSecParam;
-
-}
-
-static inline OSStatus CreatePublicKey(const uint8_t**bytesPtr, size_t*sizePtr, SecOTRPublicIdentityRef* publicId)
-{
- require(bytesPtr != NULL, fail);
- require(sizePtr != NULL, fail);
- require(publicId != NULL, fail);
- require(*sizePtr >= 7, fail);
-
- uint16_t type = 0;
- ReadShort(bytesPtr, sizePtr, &type);
-
- require(type == 0xF000, fail);
- require(*sizePtr >= 5, fail);
-
- uint32_t serializedIDLength = 0;
- ReadLong(bytesPtr, sizePtr, &serializedIDLength);
-
- require(*sizePtr >= serializedIDLength, fail);
- require(((CFIndex)serializedIDLength) >= 0, fail);
-
- CFDataRef serializedBytes = CFDataCreateWithBytesNoCopy(kCFAllocatorDefault, *bytesPtr, (CFIndex)serializedIDLength, kCFAllocatorNull);
-
- *publicId = SecOTRPublicIdentityCreateFromData(kCFAllocatorDefault, serializedBytes, NULL);
-
- *bytesPtr += serializedIDLength;
- *sizePtr -= serializedIDLength;
-
- CFReleaseNull(serializedBytes);
-
- return errSecSuccess;
-fail:
- return errSecParam;
-
-}
-
-static inline CFMutableDataRef CFDataCreateMutableFromOTRDATA(CFAllocatorRef allocator, const uint8_t**bytesPtr, size_t*sizePtr)
-{
- CFMutableDataRef result = NULL;
- uint32_t sizeInStream;
- require_noerr(ReadLong(bytesPtr, sizePtr, &sizeInStream), exit);
- require(sizeInStream <= *sizePtr, exit);
- require(((CFIndex)sizeInStream) >= 0, exit);
-
- result = CFDataCreateMutable(allocator, 0);
-
- CFDataAppendBytes(result, *bytesPtr, (CFIndex)sizeInStream);
-
- *bytesPtr += sizeInStream;
- *sizePtr += sizeInStream;
-
-exit:
- return result;
-}
-
-
-//
-// Parse and verify functions
-//
-static inline OSStatus ReadAndVerifyByte(const uint8_t**bytes, size_t*size, uint8_t expected)
-{
- uint8_t found;
- OSStatus result = ReadByte(bytes, size, &found);
- require_noerr(result, exit);
- require_action(found == expected, exit, result = errSecDecode);
-exit:
- return result;
-}
-
-static inline OSStatus ReadAndVerifyShort(const uint8_t**bytes, size_t*size, uint16_t expected)
-{
- uint16_t found;
- OSStatus result = ReadShort(bytes, size, &found);
- require_noerr(result, exit);
- require_action(found == expected, exit, result = errSecDecode);
-exit:
- return result;
-}
-
-static inline OSStatus ReadAndVerifyMessageType(const uint8_t**bytes, size_t*size, OTRMessageType expected)
-{
- OTRMessageType found;
- OSStatus result = ReadMessageType(bytes, size, &found);
- require_noerr(result, exit);
- require_action(found == expected, exit, result = errSecDecode);
-exit:
- return result;
-}
-
-static inline OSStatus ReadAndVerifyVersion(const uint8_t**bytes, size_t*size)
-{
- return ReadAndVerifyShort(bytes, size, kCurrentOTRVersion);
-}
-
-static inline OSStatus ReadAndVerifyHeader(const uint8_t**bytes, size_t*size, OTRMessageType expected)
-{
- OSStatus result = ReadAndVerifyVersion(bytes, size);
- require_noerr(result, exit);
-
- result = ReadAndVerifyMessageType(bytes, size, expected);
- require_noerr(result, exit);
-
-exit:
- return result;
-}
-
-static inline OSStatus ReadHeader(const uint8_t**bytes, size_t*size, OTRMessageType *messageType)
-{
- OSStatus result = ReadAndVerifyVersion(bytes, size);
- require_noerr(result, exit);
-
- result = ReadMessageType(bytes, size, messageType);
- require_noerr(result, exit);
-
-exit:
- return result;
-}
-
-static inline OSStatus SizeAndSkipDATA(const uint8_t **bytes, size_t *size,
- const uint8_t **dataBytes, size_t *dataSize)
-{
- OSStatus result;
- uint32_t sizeRead;
- result = ReadLong(bytes, size, &sizeRead);
-
- require_noerr(result, exit);
- require_action(sizeRead <= *size, exit, result = errSecDecode);
-
- *dataSize = sizeRead;
- *dataBytes = *bytes;
- *bytes += sizeRead;
- *size -= sizeRead;
-exit:
- return result;
-}
-
-static inline OSStatus SizeAndSkipMPI(const uint8_t **bytes, size_t *size,
- const uint8_t **mpiBytes, size_t *mpiSize)
-{
- // MPIs looke like data for skipping.
- return SizeAndSkipDATA(bytes, size, mpiBytes, mpiSize);
-}
-
-
-//
-// Appending functions
-//
-static inline void AppendLongLong(CFMutableDataRef appendTo, uint64_t value)
-{
- uint8_t bigEndian[sizeof(value)] = { value >> 56, value >> 48, value >> 40, value >> 32,
- value >> 24, value >> 16, value >> 8 , value >> 0 };
-
- CFDataAppendBytes(appendTo, bigEndian, sizeof(bigEndian));
-}
-
-static inline void AppendLong(CFMutableDataRef appendTo, uint32_t value)
-{
- uint8_t bigEndian[sizeof(value)] = { value >> 24, value >> 16, value >> 8, value };
-
- CFDataAppendBytes(appendTo, bigEndian, sizeof(bigEndian));
-}
-
-static inline void AppendShort(CFMutableDataRef appendTo, uint16_t value)
-{
- uint8_t bigEndian[sizeof(value)] = { value >> 8, value };
-
- CFDataAppendBytes(appendTo, bigEndian, sizeof(bigEndian));
-}
-
-static inline void AppendByte(CFMutableDataRef appendTo, uint8_t byte)
-{
- CFDataAppendBytes(appendTo, &byte, 1);
-}
-
-static inline void AppendMessageType(CFMutableDataRef appendTo, OTRMessageType type)
-{
- AppendByte(appendTo, type);
-}
-
-static inline void AppendMPI(CFMutableDataRef appendTo, cc_size n, const cc_unit *x)
-{
- size_t size = ccn_write_uint_size(n, x);
- /* 64 bits cast: we are appending an identity, whose size is hardcoded and less then 2^32 bytes */
- /* Worst case is we encoded a truncated length. No security issue. */
- assert(size<UINT32_MAX); /* Debug check */
- AppendLong(appendTo, (uint32_t)size);
- assert(((CFIndex)size) >= 0);
- uint8_t* insertionPtr = CFDataIncreaseLengthAndGetMutableBytes(appendTo, (CFIndex)size);
- ccn_write_uint(n, x, size, insertionPtr);
-}
-
-static inline void AppendDATA(CFMutableDataRef appendTo, size_t size, const uint8_t*data)
-{
- /* 64 bits cast: we are appending Public Key or Signature, whose sizes are hardcoded and less then 2^32 bytes */
- /* Worst case is we encoded a truncated length. No security issue. */
- assert(size<=UINT32_MAX); /* Debug check */
- AppendLong(appendTo, (uint32_t)size);
- assert(((CFIndex)size) >= 0);
- CFDataAppendBytes(appendTo, data, (CFIndex)size);
-}
-
-static inline void AppendCFDataAsDATA(CFMutableDataRef appendTo, CFDataRef dataToAppend)
-{
- AppendDATA(appendTo, (size_t)CFDataGetLength(dataToAppend), CFDataGetBytePtr(dataToAppend));
-}
-
-static inline void AppendPublicKey(CFMutableDataRef appendTo, SecOTRPublicIdentityRef publicId)
-{
- AppendShort(appendTo, 0xF000); // Custom type reserved by no one
-
- CFMutableDataRef serializedID = CFDataCreateMutable(kCFAllocatorDefault, 0);
-
- SecOTRPIAppendSerialization(publicId, serializedID, NULL);
- AppendDATA(appendTo, (size_t)CFDataGetLength(serializedID), CFDataGetBytePtr(serializedID));
-
- CFReleaseNull(serializedID);
-}
-
-static inline void AppendVersion(CFMutableDataRef appendTo)
-{
- AppendShort(appendTo, kCurrentOTRVersion);
-}
-
-static inline void AppendHeader(CFMutableDataRef appendTo, OTRMessageType type)
-{
- AppendVersion(appendTo);
- AppendMessageType(appendTo, type);
-}
-
-__END_DECLS
-
-#endif
projects / apple / security.git / blobdiff