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Make hmac_ctx optional

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Note from future self: actually md_init_ctx will be re-introduced with the
same signature later, and a new function with the additional argument will be
added.
This commit is contained in:
Manuel Pégourié-Gonnard 2015-03-25 16:08:53 +01:00
parent dfb3dc8b53
commit 4063ceb281
16 changed files with 37 additions and 31 deletions
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4
include/mbedtls/md.h
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@ -142,12 +142,14 @@ void md_free( md_context_t *ctx );
* digest-specific context (ctx->md_ctx) must be NULL. It will
* be allocated, and must be freed using md_free() later.
* \param md_info message digest to use.
* \param hmac non-zero if you want to use this context for hmac too,
* zero otherwise (saves some memory).
*
* \returns \c 0 on success, \c POLARSSL_ERR_MD_BAD_INPUT_DATA on
* parameter failure, \c POLARSSL_ERR_MD_ALLOC_FAILED if
* allocation of the digest-specific context failed.
*/
int md_init_ctx( md_context_t *ctx, const md_info_t *md_info );
int md_init_ctx( md_context_t *ctx, const md_info_t *md_info, int hmac );
/**
* \brief Returns the size of the message digest output.