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add 'ltc_mp_digit' docs

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Steffen Jaeckel 2017-07-09 13:12:21 +02:00
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doc/crypt.tex
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@ -7264,9 +7264,13 @@ All functions except the Montgomery reductions work from left to right with the
All functions (except where noted otherwise) return \textbf{CRYPT\_OK} to signify a successful operation. All error codes must be valid LibTomCrypt error codes.
The digit routines (including functions with the \textit{i} suffix) use a \textit{unsigned long} to represent the digit. If your internal digit is larger than this you must
then partition your digits. Normally this does not matter as \textit{unsigned long} will be the same size as your register size. Note that if your digit is smaller
than an \textit{unsigned long} that is also acceptable as the \textit{bits\_per\_digit} parameter will specify this.
The digit routines (including functions with the \textit{i} suffix) use a \textit{ltc\_mp\_digit} to represent the digit. If your internal digit is larger than this you must
then partition your digits. Note that if your digit is smaller than an \textit{ltc\_mp\_digit} that is also acceptable as the \textit{bits\_per\_digit} parameter will specify this.
\subsubsection{ltc\_mp\_digit}
\index{ltc\_mp\_digit}
Depending on the archtitecture \textit{ltc\_mp\_digit} is either a $32$- or $64$-bit long \textit{unsigned} data type.
\subsection{ECC Functions}
The ECC system in LibTomCrypt is based off of the NIST recommended curves over $GF(p)$ and is used to implement EC-DSA and EC-DH. The ECC functions work with