1KCAPI_MD_DIGEST(3)           Programming Interface          KCAPI_MD_DIGEST(3)
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NAME

6       kcapi_md_digest - calculate message digest on buffer (one-shot)
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SYNOPSIS

9       ssize_t kcapi_md_digest(struct kcapi_handle * handle,
10                               const uint8_t * in, size_t inlen,
11                               uint8_t * out, size_t outlen);
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ARGUMENTS

14       handle
15           [in] cipher handle
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17       in
18           [in] buffer with input data
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20       inlen
21           [in] length of input buffer
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23       out
24           [out] buffer for message digest
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26       outlen
27           [in] length of out
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DESCRIPTION

30       With this one-shot function, a message digest of the given buffer is
31       generated. The output buffer must be allocated by the caller and have
32       at least the length of the message digest size for the chosen message
33       digest.
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35       The message digest handle must have been initialized, potentially by
36       also setting the key using the generic message digest API functions.
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38       The input buffer can be at most INT_MAX in size.
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40       return size of message digest upon success; -EIO - data cannot be
41       obtained; -ENOMEM - buffer is too small for the complete message
42       digest, the buffer is filled with the truncated message digest
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AUTHOR

45       Stephan Mueller <smueller@chronox.de>
46           Author.
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49libkcapi Manual 1.3.1            January 2022               KCAPI_MD_DIGEST(3)
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