Coverage Report

Created: 2024-06-03 09:43

/libfido2/fuzz/pcsc.c
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Source (jump to first uncovered line)
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/*
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 * Copyright (c) 2022 Yubico AB. All rights reserved.
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 * Use of this source code is governed by a BSD-style
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 * license that can be found in the LICENSE file.
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 * SPDX-License-Identifier: BSD-2-Clause
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 */
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#include <assert.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <winscard.h>
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#include "mutator_aux.h"
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static const struct blob *reader_list;
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static int (*xread)(void *, u_char *, size_t, int);
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static int (*xwrite)(void *, const u_char *, size_t);
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static void (*xconsume)(const void *, size_t);
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LONG __wrap_SCardEstablishContext(DWORD, LPCVOID, LPCVOID, LPSCARDCONTEXT);
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LONG __wrap_SCardListReaders(SCARDCONTEXT, LPCSTR, LPSTR, LPDWORD);
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LONG __wrap_SCardReleaseContext(SCARDCONTEXT);
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LONG __wrap_SCardConnect(SCARDCONTEXT, LPCSTR, DWORD, DWORD, LPSCARDHANDLE,
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    LPDWORD);
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LONG __wrap_SCardDisconnect(SCARDHANDLE, DWORD);
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LONG __wrap_SCardTransmit(SCARDHANDLE, const SCARD_IO_REQUEST *, LPCBYTE,
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    DWORD, SCARD_IO_REQUEST *, LPBYTE, LPDWORD);
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LONG
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__wrap_SCardEstablishContext(DWORD dwScope, LPCVOID pvReserved1,
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    LPCVOID pvReserved2, LPSCARDCONTEXT phContext)
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9.79k
{
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9.79k
        assert(dwScope == SCARD_SCOPE_SYSTEM);
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0
        assert(pvReserved1 == NULL);
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0
        assert(pvReserved2 == NULL);
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0
        *phContext = 1;
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9.79k
        if (uniform_random(400) < 1)
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                return SCARD_E_NO_SERVICE;
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9.74k
        if (uniform_random(400) < 1)
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                return SCARD_E_NO_SMARTCARD;
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9.70k
        if (uniform_random(400) < 1)
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                return SCARD_E_NO_MEMORY;
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9.64k
        if (uniform_random(400) < 1)
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                *phContext = 0;
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9.64k
        return SCARD_S_SUCCESS;
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9.70k
}
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LONG
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__wrap_SCardListReaders(SCARDCONTEXT hContext, LPCSTR mszGroups,
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    LPSTR mszReaders, LPDWORD pcchReaders)
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5.13k
{
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5.13k
        assert(hContext == 1);
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0
        assert(mszGroups == NULL);
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0
        assert(mszReaders != NULL);
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0
        assert(pcchReaders != 0);
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5.13k
        if (reader_list == NULL || uniform_random(400) < 1)
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1.62k
                return SCARD_E_NO_READERS_AVAILABLE;
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3.51k
        if (uniform_random(400) < 1)
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                return SCARD_E_NO_MEMORY;
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3.48k
        memcpy(mszReaders, reader_list->body, reader_list->len > *pcchReaders ?
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3.44k
            *pcchReaders : reader_list->len);
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3.48k
        *pcchReaders = (DWORD)reader_list->len; /* on purpose */
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3.48k
        return SCARD_S_SUCCESS;
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3.51k
}
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LONG
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__wrap_SCardReleaseContext(SCARDCONTEXT hContext)
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9.74k
{
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9.74k
        assert(hContext == 1);
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9.74k
        return SCARD_S_SUCCESS;
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9.74k
}
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LONG
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__wrap_SCardConnect(SCARDCONTEXT hContext, LPCSTR szReader, DWORD dwShareMode,
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    DWORD dwPreferredProtocols, LPSCARDHANDLE phCard, LPDWORD pdwActiveProtocol)
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3.77k
{
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3.77k
        uint32_t r;
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3.77k
        assert(hContext == 1);
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0
        xconsume(szReader, strlen(szReader) + 1);
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3.77k
        assert(dwShareMode == SCARD_SHARE_SHARED);
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0
        assert(dwPreferredProtocols == SCARD_PROTOCOL_ANY);
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0
        assert(phCard != NULL);
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0
        assert(pdwActiveProtocol != NULL);
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3.77k
        if ((r = uniform_random(400)) < 1)
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                return SCARD_E_UNEXPECTED;
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3.74k
        *phCard = 1;
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3.74k
        *pdwActiveProtocol = (r & 1) ? SCARD_PROTOCOL_T0 : SCARD_PROTOCOL_T1;
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3.74k
        if (uniform_random(400) < 1)
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                *pdwActiveProtocol = SCARD_PROTOCOL_RAW;
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3.74k
        return SCARD_S_SUCCESS;
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3.77k
}
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LONG
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__wrap_SCardDisconnect(SCARDHANDLE hCard, DWORD dwDisposition)
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3.74k
{
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3.74k
        assert(hCard == 1);
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0
        assert(dwDisposition == SCARD_LEAVE_CARD);
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3.74k
        return SCARD_S_SUCCESS;
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3.74k
}
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extern void consume(const void *body, size_t len);
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LONG
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__wrap_SCardTransmit(SCARDHANDLE hCard, const SCARD_IO_REQUEST *pioSendPci,
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    LPCBYTE pbSendBuffer, DWORD cbSendLength, SCARD_IO_REQUEST *pioRecvPci,
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    LPBYTE pbRecvBuffer, LPDWORD pcbRecvLength)
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2.10k
{
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2.10k
        void *ioh = (void *)NFC_DEV_HANDLE;
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2.10k
        int n;
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2.10k
        assert(hCard == 1);
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0
        xconsume(pioSendPci, sizeof(*pioSendPci));
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2.10k
        xwrite(ioh, pbSendBuffer, cbSendLength);
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2.10k
        assert(pioRecvPci == NULL);
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2.10k
        if (uniform_random(400) < 1 ||
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2.10k
            (n = xread(ioh, pbRecvBuffer, *pcbRecvLength, -1)) == -1)
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                return SCARD_E_UNEXPECTED;
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2.05k
        *pcbRecvLength = (DWORD)n;
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2.05k
        return SCARD_S_SUCCESS;
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2.10k
}
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void
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set_pcsc_parameters(const struct blob *reader_list_ptr)
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1.13k
{
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1.13k
        reader_list = reader_list_ptr;
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1.13k
}
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void
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set_pcsc_io_functions(int (*read_f)(void *, u_char *, size_t, int),
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    int (*write_f)(void *, const u_char *, size_t),
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    void (*consume_f)(const void *, size_t))
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1.13k
{
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1.13k
        xread = read_f;
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1.13k
        xwrite = write_f;
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1.13k
        xconsume = consume_f;
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1.13k
}