• State
  • Locked Locked
  • Replies 7 replies
  • Subscribers 30 subscribers
  • Views 886 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

SHA1 issue with TIVAC129

Marco Crivellari
Intellectual 985 points
Other Parts Discussed in Thread: EK-TM4C129EXL

Hi all.

Regarding the following discusion :

e2e.ti.com/.../1325145

I have a similar issue with SHA1, in this way: I'm not able to obtain the same hash of my string comparing ti other site SHA1 calculator like:

http://www.sha1-online.com/.

My output is: 83b1df6a4ac9a2a4b5da922fa462e7ada1a58978

but the correct value should be: 6adfb183a4a2c94a2f92dab5ade762a47889a5a1

Below my code:

typedef struct {

uint8_t dataSource[SHA1MD5_VECTOR_LEN];

uint32_t dataLength;

} sha1Md5SourceData;

sha1Md5SourceData sha1md5LocalData;

uint32_t sha1md5LocalResult[5];

main

{

SHA1MD5HashSetMessage( "helloworld" );

SHA1MD5HashGenerate();

SHA1MD5GetHashResult( param2 );

printf("%s", param2);

}

void SHA1MD5HashGenerate( void )

{

SHAMD5Reset(SHAMD5_BASE);

SHAMD5ConfigSet(SHAMD5_BASE, SHAMD5_ALGO_SHA1);

SHAMD5DataProcess( SHAMD5_BASE, (uint32_t *)sha1md5LocalData.dataSource, sha1md5LocalData.dataLength, sha1md5LocalResult );

}

void SHA1MD5HashSetMessage( char *message )

{

memset( sha1md5LocalData.dataSource, 0, SHA1MD5_VECTOR_LEN );

memcpy( sha1md5LocalData.dataSource, message, len );

sha1md5LocalData.dataLength = (uint32_t)strlen( message);

}

Bool SHA1MD5GetHashResult( char *result )

{

sprintf( result, "%08x%08x%08x%08x%08x", sha1md5LocalResult[0],

sha1md5LocalResult[1],

sha1md5LocalResult[2],

sha1md5LocalResult[3],

sha1md5LocalResult[4] );

return (TRUE);

}

 

  • 0
    Intellectual 985 points
    Sorry, adding the correct code for function SHA1MD5HashSetMessage:

    void SHA1MD5HashSetMessage( char *message )
    {
    int len = strlen( message);
    memset( sha1md5LocalData.dataSource, 0, SHA1MD5_VECTOR_LEN );
    memcpy( sha1md5LocalData.dataSource, message, len );
    sha1md5LocalData.dataLength = (uint32_t)len;

    OSConsoleDebug( OS_CONSOLE_LEVEL, osConsoleDebugModule, "SHA1MD5HashSetMessage: " );
    OSConsoleDebug( OS_CONSOLE_LEVEL, osConsoleDebugModule, "%s", sha1md5LocalData.dataSource );
    OSConsoleDebug( OS_CONSOLE_LEVEL, osConsoleDebugModule, ", %d \n", sha1md5LocalData.dataLength );
    }
  • 0 in reply to Marco Crivellari
    TI__Mastermind 22580 points
    Hello marco,

    We have various examples in the latest version of TivaWare in the folders "/examples/boards/dk-tm4c129x" and "/examples/boards/ek-tm4c129exl". Did you already refer them? Can you try the same test with these examples and see if you still see a mis-match?

    Thanks,
    Sai
  • 0 in reply to Sai Reddy
    Intellectual 985 points

    Yes, I run exactly the same example.

    The main issue is that I cannot reproduce the same result with string.

    I need to manupulate array of char (strings) but using various cast with uint32_t I'm not able to repro the same result of other on line tools.

    Regards,

    Marco

  • 0 in reply to Marco Crivellari
    TI__Mastermind 22580 points

    Hello Marco,

    Which specific example are you using? Also provide the string that you are using for testing. I can try and see why a mis-match is occurring.

    Thanks,

    Sai

  • 0 in reply to Sai Reddy
    Intellectual 985 points
    I'm using the example:
    C:\ti\TivaWare_C_Series-2.1.1.71\examples\boards\dk-tm4c129x\sha1_hash

    the string is "helloworld" as I specified in the example above.

    Regards,
    Marco
  • 0 in reply to Marco Crivellari
    TI__Mastermind 22580 points
    Hello Marco,

    The latest TivaWare (v2.1.2.111), has the example "shamd5_hmac_example" in the folder "/examples/boards/ek-tm4c129exl", which handles the strings.

    This example by default supports only HMAC. It can be quickly modified to support HASH operation. The following are the changes I made and got the expected answer:
    * Modify the function "Cmd_algo" to replace the parameter "SHAMD5_ALGO_HMAC_SHA1" with "SHAMD5_ALGO_SHA1" to the TivaWare API "MAP_SHAMD5ConfigSet". Now when the argument "sha1" is passed for the command "algo" (from command line), the module is configured to calculate Hash instead of HMAC.
    * Modify the function "Cmd_hmac" to remove the API call "MAP_SHAMD5HMACKeySet".

    If you don't have the EK-TM4C129EXL LaunchPad, then this example has to be modified to work on DK-TM4C129X.

    Thanks,
    Sai
  • 0 in reply to Sai Reddy
    Intellectual 985 points

    Hello Sai.

    Thank for your support.

    Using the example given, I was able to make my project working fine.

    I think, the issue was relegated into these pieces of code:

    OLD CODE NOT WORKING:

    int SHA1MD5GetHashResult( char *result )

    {

    sprintf( result, "%08x%08x%08x%08x%08x", sha1md5LocalData.dataResult[0],

    sha1md5LocalData.dataResult[1],

    sha1md5LocalData.dataResult[2],

    sha1md5LocalData.dataResult[3],

    sha1md5LocalData.dataResult[4] );

    return (1);

    }

    ----------------------------------------------------------------------------

    ADAPTED CODE AND WORKING:

    int SHA1MD5GetHashResult( char *result )

    {

    char cTmp[4];

    uint32_t ui32Index;

    uint8_t *pui8Ptr;

    strcpy( result, "" );

    pui8Ptr = (uint8_t *)&sha1md5LocalData.dataResult[0];

    for(ui32Index = 0; ui32Index < sha1md5LocalData.dataLength;

    ui32Index++, pui8Ptr++)

    {

    sprintf( cTmp, "%02x", *pui8Ptr);

    strcat( result, cTmp );

    }

    return(1);

    }

    Regards,

    Marco