mbedでWebSocketサーバー＋Lチカ(Ethernet Interface)

久しぶりにmbedをいじろうと思って、とりあえず前に書いたEthernetNetIfを用いたものをmbed公式のEthernetInterfaceを使用したものに書き換えてみました。
[mbed official/EthernetInterface](http://mbed.org/users/mbed_official/code/EthernetInterface/ "mbed official/EthernetInterface")
EthernetInterfaceはmbed-rtosに依存したライブラリとなっており、EthernetInterfaceだけをインポートしてもコンパイルエラーとなるので、mbed-rtosもインポートする必要があります。
非同期なコードの書き方がわからないため、１クライアントのみにしか対応していません。非同期なコードが書ければマルチクライアントに対応したものができるかと思います。
オンラインコンパイラを元に説明すると、新しくプログラムを作成したらEthernetInterfaceとmbed-rtosライブラリをインポートし、main.cppを下記のように書き換え、sha1.h、sha1.c、sha1config.hの3ファイルを追加してコンパイルしたら、mbedに入れて実行後、[Lチカクライアント/jsdo.it](http://jsdo.it/gtk2k/fDZP "Lチカクライアント/jsdo.it")にアクセスして試してみてください。
(sha1config.hのコードを一番上に書いてあるのは、一番下に書いてたら表示されなかったためです。)

```sha1config.h
#ifndef SHA1CONFIG_H
#define SHA1CONFIG_H

#define POLARSSL_SHA1_C 1

#endif
```

```cpp:main.cpp
#include <string>
#include <sstream>
#include "mbed.h"
#include "EthernetInterface.h"
#include "sha1config.h"
#include "sha1.h"
const int WS_HANDSHAKE = 1;
const int WS_CONNECT = 2;
int wsState = 0;
DigitalOut led1(LED1);
DigitalOut led2(LED2);
DigitalOut led3(LED3);
DigitalOut led4(LED4);

string encode64(char *Buf,int Length) {
    char *Codes64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
    int Byte3=0;
    string Result="";
    for (int i=0; i<Length; i++) {
        Byte3=(Byte3<<8)+(int)Buf[i];
        if ((i+1)%3==0) {
            Result=Result+Codes64[(Byte3>>18)&0x3F];
            Result=Result+Codes64[(Byte3>>12)&0x3F];
            Result=Result+Codes64[(Byte3>>6)&0x3F];
            Result=Result+Codes64[(Byte3)&0x3F];
            Byte3=0;
        }
    }

    int Rest=Length%3;
    switch (Rest) {
        case 1:
            Byte3=Byte3<<4;
            Result=Result+Codes64[(Byte3>>6)&0x3F];
            Result=Result+Codes64[(Byte3)&0x3F];
            Result=Result+"==";
            break;
        case 2:
            Byte3=Byte3<<2;
            Result=Result+Codes64[(Byte3>>12)&0x3F];
            Result=Result+Codes64[(Byte3>>6 )&0x3F];
            Result=Result+Codes64[(Byte3)&0x3F];
            Result=Result+"=";
            break;
    }
    return Result;
}

int main() {
    EthernetInterface eth;
    eth.init("192.168.0.2", "255.255.255.0", "192.168.0.2");
    eth.connect(); 
    TCPSocketServer server;
    server.bind(8080);
    server.listen();
    printf("\nWait for new connection...\n");
    TCPSocketConnection sock;
    server.accept(sock);
    wsState = WS_HANDSHAKE;
    char buff[600];
    int len;
    while (true) {
        len = sock.receive(buff, sizeof(buff)-1);
        if (len <= 0){
            printf("close by 0 length\n");
            wsState = WS_HANDSHAKE;
            continue;
        }
        buff[len] = '\0';
        switch(wsState){
            case WS_HANDSHAKE:
                printf("Received %d chars from server:\n%s\n", len, buff);
                for (int i = 0; i < len; i++) {
                    if (buff[i] == 'K' && buff[i + 1] == 'e' && buff[i + 2] == 'y') {
                        for (int j = i + 1; j < len; j++) {
                            if (buff[j] == '\r') {
                                i += 5;
                                int keyLen = j - i;
                                char strKey[keyLen + 1];
                                strKey[keyLen] = 0;
                                strncpy(strKey, buff + i, keyLen);
                                char guid[] = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
                                strcat(strKey, guid);
                                unsigned char hash[20];
                                sha1((unsigned char*)strKey,strlen((char*)strKey),hash);
                                string accept = encode64((char*)hash, 20);
                                string hsRes = "HTTP/1.1 101 Switching Protocols\r\nUpgrade: websocket\r\nConnection: Upgrade\r\nSec-WebSocket-Accept: ";
                                hsRes += accept;
                                hsRes += "\r\n\r\n";
                                printf("%s", hsRes.c_str());
                                sock.send_all((char *)hsRes.c_str(), hsRes.size());
                                printf("change to WS_CONNECT state\n");
                                wsState = WS_CONNECT;
                                break;
                            }
                        }
                    }
                }
                break;
            case WS_CONNECT:
                bool fin = (buff[0] & 0x80) == 0x80;
                int opcode = buff[0] & 0x0f;
                if (opcode == 0x8) {
                    printf("close by close opcode\n");
                    wsState = WS_HANDSHAKE;
                    sock.close();
                    break;
                }
                if (opcode == 0x9) {
                    buff[0] += 1;
                    sock.send_all(buff, len);
                    break;
                }
                int dataLen = buff[1] & 0x7f;
                if (!fin || dataLen > 125) {
                    sock.close();
                    printf("close by illegal data length \n");
                    wsState = WS_HANDSHAKE;
                    break;
                }
                int i = 0;
                for (i = 0; i < dataLen; i++) {
                    buff[6 + i] = buff[6 + i] ^ buff[2 + (i % 4)];
                }
                printf("data length:%d\n", dataLen);
                buff[6 + dataLen] = 0;
                if (opcode == 1) {
                    printf("received data:%s\n", buff + 6);
                    char sendData[2 + dataLen + 1];
                    sendData[0] = buff[0];
                    sendData[1] = buff[1] & 0x7f;
                    for (i = 0; i < dataLen; i++) {
                        sendData[2 + i] = buff[6 + i];
                    }
                    sendData[2 + dataLen] = 0;
                    sock.send_all(sendData, 2 + dataLen);
                } else if (opcode == 2) {
                    led1 = buff[6 + 0];
                    led2 = buff[6 + 1];
                    led3 = buff[6 + 2];
                    led4 = buff[6 + 3];
                }
                break;
        }
    }
      
    sock.close();
    eth.disconnect();
    while(1) {}
}
```

```cpp:sha1.h
/**
 * \file sha1.h
 *
 *  Copyright (C) 2006-2010, Paul Bakker <polarssl_maintainer at polarssl.org>
 *  All rights reserved.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
#ifndef POLARSSL_SHA1_H
#define POLARSSL_SHA1_H

/**
 * \brief          SHA-1 context structure
 */
typedef struct
{
    unsigned long total[2];     /*!< number of bytes processed  */
    unsigned long state[5];     /*!< intermediate digest state  */
    unsigned char buffer[64];   /*!< data block being processed */

    unsigned char ipad[64];     /*!< HMAC: inner padding        */
    unsigned char opad[64];     /*!< HMAC: outer padding        */
}
sha1_context;

#ifdef __cplusplus
extern "C" {
#endif

/**
 * \brief          SHA-1 context setup
 *
 * \param ctx      context to be initialized
 */
void sha1_starts( sha1_context *ctx );

/**
 * \brief          SHA-1 process buffer
 *
 * \param ctx      SHA-1 context
 * \param input    buffer holding the  data
 * \param ilen     length of the input data
 */
void sha1_update( sha1_context *ctx, const unsigned char *input, int ilen );

/**
 * \brief          SHA-1 final digest
 *
 * \param ctx      SHA-1 context
 * \param output   SHA-1 checksum result
 */
void sha1_finish( sha1_context *ctx, unsigned char output[20] );

/**
 * \brief          Output = SHA-1( input buffer )
 *
 * \param input    buffer holding the  data
 * \param ilen     length of the input data
 * \param output   SHA-1 checksum result
 */
void sha1( const unsigned char *input, int ilen, unsigned char output[20] );

#if 0 //No need for that
/**
 * \brief          Output = SHA-1( file contents )
 *
 * \param path     input file name
 * \param output   SHA-1 checksum result
 *
 * \return         0 if successful, 1 if fopen failed,
 *                 or 2 if fread failed
 */
int sha1_file( const char *path, unsigned char output[20] );
#endif

/**
 * \brief          SHA-1 HMAC context setup
 *
 * \param ctx      HMAC context to be initialized
 * \param key      HMAC secret key
 * \param keylen   length of the HMAC key
 */
void sha1_hmac_starts( sha1_context *ctx, const unsigned char *key, int keylen );

/**
 * \brief          SHA-1 HMAC process buffer
 *
 * \param ctx      HMAC context
 * \param input    buffer holding the  data
 * \param ilen     length of the input data
 */
void sha1_hmac_update( sha1_context *ctx, const unsigned char *input, int ilen );

/**
 * \brief          SHA-1 HMAC final digest
 *
 * \param ctx      HMAC context
 * \param output   SHA-1 HMAC checksum result
 */
void sha1_hmac_finish( sha1_context *ctx, unsigned char output[20] );

/**
 * \brief          SHA-1 HMAC context reset
 *
 * \param ctx      HMAC context to be reset
 */
void sha1_hmac_reset( sha1_context *ctx );

/**
 * \brief          Output = HMAC-SHA-1( hmac key, input buffer )
 *
 * \param key      HMAC secret key
 * \param keylen   length of the HMAC key
 * \param input    buffer holding the  data
 * \param ilen     length of the input data
 * \param output   HMAC-SHA-1 result
 */
void sha1_hmac( const unsigned char *key, int keylen,
                const unsigned char *input, int ilen,
                unsigned char output[20] );

/**
 * \brief          Checkup routine
 *
 * \return         0 if successful, or 1 if the test failed
 */
int sha1_self_test( int verbose );

#ifdef __cplusplus
}
#endif

#endif /* sha1.h */
```

```c:sha1.c
/*
 *  FIPS-180-1 compliant SHA-1 implementation
 *
 *  Copyright (C) 2006-2010, Paul Bakker <polarssl_maintainer at polarssl.org>
 *  All rights reserved.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
/*
 *  The SHA-1 standard was published by NIST in 1993.
 *
 *  http://www.itl.nist.gov/fipspubs/fip180-1.htm
 */
#include "sha1config.h"
#if defined(POLARSSL_SHA1_C)
#include "sha1.h"
#include <string.h>
#include <stdio.h>

/*
 * 32-bit integer manipulation macros (big endian)
 */
#ifndef GET_ULONG_BE
#define GET_ULONG_BE(n,b,i)                             \
{                                                       \
    (n) = ( (unsigned long) (b)[(i)    ] << 24 )        \
        | ( (unsigned long) (b)[(i) + 1] << 16 )        \
        | ( (unsigned long) (b)[(i) + 2] <<  8 )        \
        | ( (unsigned long) (b)[(i) + 3]       );       \
}
#endif

#ifndef PUT_ULONG_BE
#define PUT_ULONG_BE(n,b,i)                             \
{                                                       \
    (b)[(i)    ] = (unsigned char) ( (n) >> 24 );       \
    (b)[(i) + 1] = (unsigned char) ( (n) >> 16 );       \
    (b)[(i) + 2] = (unsigned char) ( (n) >>  8 );       \
    (b)[(i) + 3] = (unsigned char) ( (n)       );       \
}
#endif

/*
 * SHA-1 context setup
 */
void sha1_starts( sha1_context *ctx )
{
    ctx->total[0] = 0;
    ctx->total[1] = 0;
    ctx->state[0] = 0x67452301;
    ctx->state[1] = 0xEFCDAB89;
    ctx->state[2] = 0x98BADCFE;
    ctx->state[3] = 0x10325476;
    ctx->state[4] = 0xC3D2E1F0;
}

static void sha1_process( sha1_context *ctx, const unsigned char data[64] )
{
    unsigned long temp, W[16], A, B, C, D, E;
    GET_ULONG_BE( W[ 0], data,  0 );
    GET_ULONG_BE( W[ 1], data,  4 );
    GET_ULONG_BE( W[ 2], data,  8 );
    GET_ULONG_BE( W[ 3], data, 12 );
    GET_ULONG_BE( W[ 4], data, 16 );
    GET_ULONG_BE( W[ 5], data, 20 );
    GET_ULONG_BE( W[ 6], data, 24 );
    GET_ULONG_BE( W[ 7], data, 28 );
    GET_ULONG_BE( W[ 8], data, 32 );
    GET_ULONG_BE( W[ 9], data, 36 );
    GET_ULONG_BE( W[10], data, 40 );
    GET_ULONG_BE( W[11], data, 44 );
    GET_ULONG_BE( W[12], data, 48 );
    GET_ULONG_BE( W[13], data, 52 );
    GET_ULONG_BE( W[14], data, 56 );
    GET_ULONG_BE( W[15], data, 60 );
#define S(x,n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
#define R(t)                                            \
(                                                       \
    temp = W[(t -  3) & 0x0F] ^ W[(t - 8) & 0x0F] ^     \
           W[(t - 14) & 0x0F] ^ W[ t      & 0x0F],      \
    ( W[t & 0x0F] = S(temp,1) )                         \
)
#define P(a,b,c,d,e,x)                                  \
{                                                       \
    e += S(a,5) + F(b,c,d) + K + x; b = S(b,30);        \
}
    A = ctx->state[0];
    B = ctx->state[1];
    C = ctx->state[2];
    D = ctx->state[3];
    E = ctx->state[4];
#define F(x,y,z) (z ^ (x & (y ^ z)))
#define K 0x5A827999
    P( A, B, C, D, E, W[0]  );
    P( E, A, B, C, D, W[1]  );
    P( D, E, A, B, C, W[2]  );
    P( C, D, E, A, B, W[3]  );
    P( B, C, D, E, A, W[4]  );
    P( A, B, C, D, E, W[5]  );
    P( E, A, B, C, D, W[6]  );
    P( D, E, A, B, C, W[7]  );
    P( C, D, E, A, B, W[8]  );
    P( B, C, D, E, A, W[9]  );
    P( A, B, C, D, E, W[10] );
    P( E, A, B, C, D, W[11] );
    P( D, E, A, B, C, W[12] );
    P( C, D, E, A, B, W[13] );
    P( B, C, D, E, A, W[14] );
    P( A, B, C, D, E, W[15] );
    P( E, A, B, C, D, R(16) );
    P( D, E, A, B, C, R(17) );
    P( C, D, E, A, B, R(18) );
    P( B, C, D, E, A, R(19) );
#undef K
#undef F
#define F(x,y,z) (x ^ y ^ z)
#define K 0x6ED9EBA1
    P( A, B, C, D, E, R(20) );
    P( E, A, B, C, D, R(21) );
    P( D, E, A, B, C, R(22) );
    P( C, D, E, A, B, R(23) );
    P( B, C, D, E, A, R(24) );
    P( A, B, C, D, E, R(25) );
    P( E, A, B, C, D, R(26) );
    P( D, E, A, B, C, R(27) );
    P( C, D, E, A, B, R(28) );
    P( B, C, D, E, A, R(29) );
    P( A, B, C, D, E, R(30) );
    P( E, A, B, C, D, R(31) );
    P( D, E, A, B, C, R(32) );
    P( C, D, E, A, B, R(33) );
    P( B, C, D, E, A, R(34) );
    P( A, B, C, D, E, R(35) );
    P( E, A, B, C, D, R(36) );
    P( D, E, A, B, C, R(37) );
    P( C, D, E, A, B, R(38) );
    P( B, C, D, E, A, R(39) );
#undef K
#undef F
#define F(x,y,z) ((x & y) | (z & (x | y)))
#define K 0x8F1BBCDC
    P( A, B, C, D, E, R(40) );
    P( E, A, B, C, D, R(41) );
    P( D, E, A, B, C, R(42) );
    P( C, D, E, A, B, R(43) );
    P( B, C, D, E, A, R(44) );
    P( A, B, C, D, E, R(45) );
    P( E, A, B, C, D, R(46) );
    P( D, E, A, B, C, R(47) );
    P( C, D, E, A, B, R(48) );
    P( B, C, D, E, A, R(49) );
    P( A, B, C, D, E, R(50) );
    P( E, A, B, C, D, R(51) );
    P( D, E, A, B, C, R(52) );
    P( C, D, E, A, B, R(53) );
    P( B, C, D, E, A, R(54) );
    P( A, B, C, D, E, R(55) );
    P( E, A, B, C, D, R(56) );
    P( D, E, A, B, C, R(57) );
    P( C, D, E, A, B, R(58) );
    P( B, C, D, E, A, R(59) );
#undef K
#undef F
#define F(x,y,z) (x ^ y ^ z)
#define K 0xCA62C1D6
    P( A, B, C, D, E, R(60) );
    P( E, A, B, C, D, R(61) );
    P( D, E, A, B, C, R(62) );
    P( C, D, E, A, B, R(63) );
    P( B, C, D, E, A, R(64) );
    P( A, B, C, D, E, R(65) );
    P( E, A, B, C, D, R(66) );
    P( D, E, A, B, C, R(67) );
    P( C, D, E, A, B, R(68) );
    P( B, C, D, E, A, R(69) );
    P( A, B, C, D, E, R(70) );
    P( E, A, B, C, D, R(71) );
    P( D, E, A, B, C, R(72) );
    P( C, D, E, A, B, R(73) );
    P( B, C, D, E, A, R(74) );
    P( A, B, C, D, E, R(75) );
    P( E, A, B, C, D, R(76) );
    P( D, E, A, B, C, R(77) );
    P( C, D, E, A, B, R(78) );
    P( B, C, D, E, A, R(79) );
#undef K
#undef F
    ctx->state[0] += A;
    ctx->state[1] += B;
    ctx->state[2] += C;
    ctx->state[3] += D;
    ctx->state[4] += E;
}

/*
 * SHA-1 process buffer
 */
void sha1_update( sha1_context *ctx, const unsigned char *input, int ilen )
{
    int fill;
    unsigned long left;
    if( ilen <= 0 ) return;
    left = ctx->total[0] & 0x3F;
    fill = 64 - left;
    ctx->total[0] += ilen;
    ctx->total[0] &= 0xFFFFFFFF;
    if( ctx->total[0] < (unsigned long) ilen )
        ctx->total[1]++;
    if( left && ilen >= fill )
    {
        memcpy( (void *) (ctx->buffer + left),
                (void *) input, fill );
        sha1_process( ctx, ctx->buffer );
        input += fill;
        ilen  -= fill;
        left = 0;
    }
    while( ilen >= 64 )
    {
        sha1_process( ctx, input );
        input += 64;
        ilen  -= 64;
    }
    if( ilen > 0 )
    {
        memcpy( (void *) (ctx->buffer + left),
                (void *) input, ilen );
    }
}

static const unsigned char sha1_padding[64] =
{
 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};

/*
 * SHA-1 final digest
 */
void sha1_finish( sha1_context *ctx, unsigned char output[20] )
{
    unsigned long last, padn;
    unsigned long high, low;
    unsigned char msglen[8];
    high = ( ctx->total[0] >> 29 )
         | ( ctx->total[1] <<  3 );
    low  = ( ctx->total[0] <<  3 );
    PUT_ULONG_BE( high, msglen, 0 );
    PUT_ULONG_BE( low,  msglen, 4 );
    last = ctx->total[0] & 0x3F;
    padn = ( last < 56 ) ? ( 56 - last ) : ( 120 - last );
    sha1_update( ctx, (unsigned char *) sha1_padding, padn );
    sha1_update( ctx, msglen, 8 );
    PUT_ULONG_BE( ctx->state[0], output,  0 );
    PUT_ULONG_BE( ctx->state[1], output,  4 );
    PUT_ULONG_BE( ctx->state[2], output,  8 );
    PUT_ULONG_BE( ctx->state[3], output, 12 );
    PUT_ULONG_BE( ctx->state[4], output, 16 );
}

/*
 * output = SHA-1( input buffer )
 */
void sha1( const unsigned char *input, int ilen, unsigned char output[20] )
{
    sha1_context ctx;
    sha1_starts( &ctx );
    sha1_update( &ctx, input, ilen );
    sha1_finish( &ctx, output );
    memset( &ctx, 0, sizeof( sha1_context ) );
}

/*
 * output = SHA-1( file contents )
 */
#if 0 //No need for that
int sha1_file( const char *path, unsigned char output[20] )
{
    FILE *f;
    size_t n;
    sha1_context ctx;
    unsigned char buf[1024];
    if( ( f = fopen( path, "rb" ) ) == NULL )
        return( 1 );
    sha1_starts( &ctx );
    while( ( n = fread( buf, 1, sizeof( buf ), f ) ) > 0 )
        sha1_update( &ctx, buf, (int) n );
    sha1_finish( &ctx, output );
    memset( &ctx, 0, sizeof( sha1_context ) );
    if( ferror( f ) != 0 )
    {
        fclose( f );
        return( 2 );
    }
    fclose( f );
    return( 0 );
}
#endif

/*
 * SHA-1 HMAC context setup
 */
void sha1_hmac_starts( sha1_context *ctx, const unsigned char *key, int keylen )
{
    int i;
    unsigned char sum[20];
    if( keylen > 64 )
    {
        sha1( key, keylen, sum );
        keylen = 20;
        key = sum;
    }
    memset( ctx->ipad, 0x36, 64 );
    memset( ctx->opad, 0x5C, 64 );
    for( i = 0; i < keylen; i++ )
    {
        ctx->ipad[i] = (unsigned char)( ctx->ipad[i] ^ key[i] );
        ctx->opad[i] = (unsigned char)( ctx->opad[i] ^ key[i] );
    }
    sha1_starts( ctx );
    sha1_update( ctx, ctx->ipad, 64 );
    memset( sum, 0, sizeof( sum ) );
}

/*
 * SHA-1 HMAC process buffer
 */
void sha1_hmac_update( sha1_context *ctx, const unsigned char *input, int ilen )
{
    sha1_update( ctx, input, ilen );
}

/*
 * SHA-1 HMAC final digest
 */
void sha1_hmac_finish( sha1_context *ctx, unsigned char output[20] )
{
    unsigned char tmpbuf[20];
    sha1_finish( ctx, tmpbuf );
    sha1_starts( ctx );
    sha1_update( ctx, ctx->opad, 64 );
    sha1_update( ctx, tmpbuf, 20 );
    sha1_finish( ctx, output );
    memset( tmpbuf, 0, sizeof( tmpbuf ) );
}

/*
 * SHA1 HMAC context reset
 */
void sha1_hmac_reset( sha1_context *ctx )
{
    sha1_starts( ctx );
    sha1_update( ctx, ctx->ipad, 64 );
}

/*
 * output = HMAC-SHA-1( hmac key, input buffer )
 */
void sha1_hmac( const unsigned char *key, int keylen,
                const unsigned char *input, int ilen,
                unsigned char output[20] )
{
    sha1_context ctx;
    sha1_hmac_starts( &ctx, key, keylen );
    sha1_hmac_update( &ctx, input, ilen );
    sha1_hmac_finish( &ctx, output );
    memset( &ctx, 0, sizeof( sha1_context ) );
}

#if defined(POLARSSL_SELF_TEST)
/*
 * FIPS-180-1 test vectors
 */
static unsigned char sha1_test_buf[3][57] = 
{
    { "abc" },
    { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
    { "" }
};

static const int sha1_test_buflen[3] =
{
    3, 56, 1000
};

static const unsigned char sha1_test_sum[3][20] =
{
    { 0xA9, 0x99, 0x3E, 0x36, 0x47, 0x06, 0x81, 0x6A, 0xBA, 0x3E,
      0x25, 0x71, 0x78, 0x50, 0xC2, 0x6C, 0x9C, 0xD0, 0xD8, 0x9D },
    { 0x84, 0x98, 0x3E, 0x44, 0x1C, 0x3B, 0xD2, 0x6E, 0xBA, 0xAE,
      0x4A, 0xA1, 0xF9, 0x51, 0x29, 0xE5, 0xE5, 0x46, 0x70, 0xF1 },
    { 0x34, 0xAA, 0x97, 0x3C, 0xD4, 0xC4, 0xDA, 0xA4, 0xF6, 0x1E,
      0xEB, 0x2B, 0xDB, 0xAD, 0x27, 0x31, 0x65, 0x34, 0x01, 0x6F }
};

/*
 * RFC 2202 test vectors
 */
static unsigned char sha1_hmac_test_key[7][26] =
{
    { "\x0B\x0B\x0B\x0B\x0B\x0B\x0B\x0B\x0B\x0B\x0B\x0B\x0B\x0B\x0B\x0B"
      "\x0B\x0B\x0B\x0B" },
    { "Jefe" },
    { "\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA\xAA"
      "\xAA\xAA\xAA\xAA" },
    { "\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0A\x0B\x0C\x0D\x0E\x0F\x10"
      "\x11\x12\x13\x14\x15\x16\x17\x18\x19" },
    { "\x0C\x0C\x0C\x0C\x0C\x0C\x0C\x0C\x0C\x0C\x0C\x0C\x0C\x0C\x0C\x0C"
      "\x0C\x0C\x0C\x0C" },
    { "" }, /* 0xAA 80 times */
    { "" }
};

static const int sha1_hmac_test_keylen[7] =
{
    20, 4, 20, 25, 20, 80, 80
};

static unsigned char sha1_hmac_test_buf[7][74] =
{
    { "Hi There" },
    { "what do ya want for nothing?" },
    { "\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD"
      "\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD"
      "\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD"
      "\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD"
      "\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD\xDD" },
    { "\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD"
      "\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD"
      "\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD"
      "\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD"
      "\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD\xCD" },
    { "Test With Truncation" },
    { "Test Using Larger Than Block-Size Key - Hash Key First" },
    { "Test Using Larger Than Block-Size Key and Larger"
      " Than One Block-Size Data" }
};

static const int sha1_hmac_test_buflen[7] =
{
    8, 28, 50, 50, 20, 54, 73
};

static const unsigned char sha1_hmac_test_sum[7][20] =
{
    { 0xB6, 0x17, 0x31, 0x86, 0x55, 0x05, 0x72, 0x64, 0xE2, 0x8B,
      0xC0, 0xB6, 0xFB, 0x37, 0x8C, 0x8E, 0xF1, 0x46, 0xBE, 0x00 },
    { 0xEF, 0xFC, 0xDF, 0x6A, 0xE5, 0xEB, 0x2F, 0xA2, 0xD2, 0x74,
      0x16, 0xD5, 0xF1, 0x84, 0xDF, 0x9C, 0x25, 0x9A, 0x7C, 0x79 },
    { 0x12, 0x5D, 0x73, 0x42, 0xB9, 0xAC, 0x11, 0xCD, 0x91, 0xA3,
      0x9A, 0xF4, 0x8A, 0xA1, 0x7B, 0x4F, 0x63, 0xF1, 0x75, 0xD3 },
    { 0x4C, 0x90, 0x07, 0xF4, 0x02, 0x62, 0x50, 0xC6, 0xBC, 0x84,
      0x14, 0xF9, 0xBF, 0x50, 0xC8, 0x6C, 0x2D, 0x72, 0x35, 0xDA },
    { 0x4C, 0x1A, 0x03, 0x42, 0x4B, 0x55, 0xE0, 0x7F, 0xE7, 0xF2,
      0x7B, 0xE1 },
    { 0xAA, 0x4A, 0xE5, 0xE1, 0x52, 0x72, 0xD0, 0x0E, 0x95, 0x70,
      0x56, 0x37, 0xCE, 0x8A, 0x3B, 0x55, 0xED, 0x40, 0x21, 0x12 },
    { 0xE8, 0xE9, 0x9D, 0x0F, 0x45, 0x23, 0x7D, 0x78, 0x6D, 0x6B,
      0xBA, 0xA7, 0x96, 0x5C, 0x78, 0x08, 0xBB, 0xFF, 0x1A, 0x91 }
};

/*
 * Checkup routine
 */
int sha1_self_test( int verbose )
{
    int i, j, buflen;
    unsigned char buf[1024];
    unsigned char sha1sum[20];
    sha1_context ctx;
    /*
     * SHA-1
     */
    for( i = 0; i < 3; i++ )
    {
        if( verbose != 0 )
            printf( "  SHA-1 test #%d: ", i + 1 );
        sha1_starts( &ctx );
        if( i == 2 )
        {
            memset( buf, 'a', buflen = 1000 );
            for( j = 0; j < 1000; j++ )
                sha1_update( &ctx, buf, buflen );
        }
        else
            sha1_update( &ctx, sha1_test_buf[i],
                               sha1_test_buflen[i] );
        sha1_finish( &ctx, sha1sum );
        if( memcmp( sha1sum, sha1_test_sum[i], 20 ) != 0 )
        {
            if( verbose != 0 )
                printf( "failed\n" );
            return( 1 );
        }
        if( verbose != 0 )
            printf( "passed\n" );
    }
    if( verbose != 0 )
        printf( "\n" );
    for( i = 0; i < 7; i++ )
    {
        if( verbose != 0 )
            printf( "  HMAC-SHA-1 test #%d: ", i + 1 );
        if( i == 5 || i == 6 )
        {
            memset( buf, '\xAA', buflen = 80 );
            sha1_hmac_starts( &ctx, buf, buflen );
        }
        else
            sha1_hmac_starts( &ctx, sha1_hmac_test_key[i],
                                    sha1_hmac_test_keylen[i] );
        sha1_hmac_update( &ctx, sha1_hmac_test_buf[i],
                                sha1_hmac_test_buflen[i] );
        sha1_hmac_finish( &ctx, sha1sum );
        buflen = ( i == 4 ) ? 12 : 20;
        if( memcmp( sha1sum, sha1_hmac_test_sum[i], buflen ) != 0 )
        {
            if( verbose != 0 )
                printf( "failed\n" );
            return( 1 );
        }
        if( verbose != 0 )
            printf( "passed\n" );
    }
    if( verbose != 0 )
        printf( "\n" );
    return( 0 );
}
#endif
#endif
```