56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
/* LibTomCrypt, modular cryptographic library -- Tom St Denis
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*
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* LibTomCrypt is a library that provides various cryptographic
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* algorithms in a highly modular and flexible manner.
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*
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* The library is free for all purposes without any express
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* guarantee it works.
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*/
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#include "tomcrypt.h"
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/**
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@file radix_to_bin.c
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Convert an MPI from a specific radix to binary data.
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Steffen Jaeckel
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*/
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/**
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Convert an MPI from a specific radix to binary data
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@param in The input
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@param radix The radix of the input
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@param out The output buffer
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@param len [in/out] The length of the output buffer
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@return CRYPT_OK on success.
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*/
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int radix_to_bin(const void *in, int radix, void *out, size_t* len)
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{
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size_t l;
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void* mpi;
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int err;
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LTC_ARGCHK(in != NULL);
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LTC_ARGCHK(len != NULL);
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if ((err = mp_init(&mpi)) != CRYPT_OK) return err;
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if ((err = mp_read_radix(mpi, in, radix)) != CRYPT_OK) goto LBL_ERR;
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if ((l = mp_unsigned_bin_size(mpi)) > *len) {
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*len = l;
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err = CRYPT_BUFFER_OVERFLOW;
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goto LBL_ERR;
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}
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*len = l;
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if ((err = mp_to_unsigned_bin(mpi, out)) != CRYPT_OK) goto LBL_ERR;
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LBL_ERR:
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mp_clear(mpi);
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return err;
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}
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/* ref: $Format:%D$ */
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/* git commit: $Format:%H$ */
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/* commit time: $Format:%ai$ */
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