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jdcowpland
jdcowpland
Associate III
April 3, 2014
Question

Using MD5 Hash on stm32f417

  • April 3, 2014
  • 5 replies
  • 2460 views
Posted on April 03, 2014 at 13:08

Hey guys,

I'm trying to calculate a md5 hash on a string I've got and I'm calling the function:

HASH_MD5((uint8_t *)buffer, size, Md5output);

where size is the size of the buffer. But the Md5output is empty after execution. Is there something I'm missing other than that line? The only other thing I've done is enable the clock:

RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_HASH, ENABLE);
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    5 replies

    jdcowpland
    jdcowplandAuthor
    Associate III
    April 3, 2014
    Posted on April 03, 2014 at 13:16

    Bit of extra info:

    the buffer is defined as a string and contains the text ''042ACE880483B3\r\n03.04.2014 12:12:20\r\n'' The result of the HASH_MD5 is success so not quite sure what is going on. Md5output is defined as uint8_t Md5output[16] and size is an integer 37.

    jdcowpland
    jdcowplandAuthor
    Associate III
    April 7, 2014
    Posted on April 07, 2014 at 09:55

    Has no one had any experience with the hash library?

    Amel NASRI
    Amel NASRI
    ST Technical Moderator
    April 8, 2014
    Posted on April 08, 2014 at 12:04

    There is an example within the STM32F4 Standard peripheral library (Project\STM32F4xx_StdPeriph_Examples\HASH\HASH_SHA1_MD5). You can try it & check if you still have an issue.

    -Mayla-

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    Tesla DeLorean
    Tesla DeLorean
    Guru
    April 8, 2014
    Posted on April 08, 2014 at 17:03

    Is there something I'm missing other than that line?

    Is the PLL running? The HASH unit clocks off the 48 MHz Q Tap
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    Tesla DeLorean
    Tesla DeLorean
    Guru
    April 8, 2014
    Posted on April 08, 2014 at 17:18

    From an F215 

    ---------------------------------------
MD5 Hash Data:
---------------------------------------
02 93 21 E4 4A DD 8C 0D 11 DF 8B DA 66 21 10 7C

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