📄 uclmmbase-hmac.html
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><H1
><A
NAME="UCLMMBASE-HMAC"
>HMAC</A
></H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN12"
></A
><H2
>Name</H2
>HMAC -- cryptographic message authentication.</DIV
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>Synopsis</H2
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> #include <hmac.h>
void <A
HREF="uclmmbase-hmac.html#HMAC-MD5"
>hmac_md5</A
> (unsigned char *data,
int data_len,
unsigned char *key,
int key_len,
unsigned char digest[16]);</PRE
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><H2
>Description</H2
><P
> HMAC is a cryptographic mechanism for message authentication described
in RFC2104. It allows a sender and receiver with a shared
cryptographic key to verify the authenticity of a message. </P
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>Details</H2
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><H3
><A
NAME="HMAC-MD5"
></A
>hmac_md5 ()</H3
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>void hmac_md5 (unsigned char *data,
int data_len,
unsigned char *key,
int key_len,
unsigned char digest[16]);</PRE
></TD
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><P
>Computes MD5 <TT
CLASS="PARAMETER"
><I
>digest</I
></TT
> of <TT
CLASS="PARAMETER"
><I
>data</I
></TT
> using key <TT
CLASS="PARAMETER"
><I
>key</I
></TT
>.</P
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><TT
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><I
>data</I
></TT
> :</TD
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> pointer to data stream.</TD
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><TD
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><TT
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><I
>data_len</I
></TT
> :</TD
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> length of data stream in bytes.</TD
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><TT
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><I
>key</I
></TT
> :</TD
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> pointer to authentication key.</TD
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><TT
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><I
>key_len</I
></TT
> :</TD
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> length of authentication key in bytes.</TD
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><TT
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>digest</I
></TT
> :</TD
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> digest to be filled in.</TD
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><H2
>See Also</H2
><P
> <A
HREF="http://www.ietf.org/rfc/rfc2104.txt"
TARGET="_top"
>RFC2104 - HMAC: Keyed-Hashing for Message Authentication</A
> </P
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