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- Split current md_starts() and md_hmac_starts() functionality into separate md_init_ctx() for allocating the context and the existing starts() functions to initialize the message digest for use.

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This commit is contained in:
Paul Bakker 2011-01-20 16:42:01 +00:00
parent a885d6835f
commit 562535d11b
3 changed files with 62 additions and 47 deletions
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52
include/polarssl/md.h
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@ -31,7 +31,8 @@
#define POLARSSL_MD_H
typedef enum {
POLARSSL_MD_MD2=0,
POLARSSL_MD_NONE=0,
POLARSSL_MD_MD2,
POLARSSL_MD_MD4,
POLARSSL_MD_MD5,
POLARSSL_MD_SHA1,
@ -148,6 +149,31 @@ const md_info_t *md_info_from_string( const char *md_name );
*/
const md_info_t *md_info_from_type( md_type_t md_type );
/**
* \brief Initialises and fills the message digest context structure with
* the appropriate values.
*
* \param ctx context to initialise. May not be NULL. The
* digest-specific context (ctx->md_ctx) must be NULL. It will
* be allocated, and must be freed using md_free_ctx() later.
* \param md_info message digest to use.
*
* \returns \c 0 on success, \c 1 on parameter failure, \c 2 if
* allocation of the cipher-specific context failed.
*/
int md_init_ctx( md_context_t *ctx, const md_info_t *md_info );
/**
* \brief Free the message-specific context of ctx. Freeing ctx itself
* remains the responsibility of the caller.
*
* \param ctx Free the -specific context
* \param output Generic message digest checksum result
*
* \returns 0 on success, 1 if parameter verification fails.
*/
int md_free_ctx( md_context_t *ctx );
/**
* \brief Returns the size of the message digest output.
*
@ -185,16 +211,13 @@ static inline const char *md_get_name ( const md_info_t *md_info )
}
/**
* \brief Generic message digest context setup.
* \brief Set-up the given context for a new message digest
*
* \param md_info message digest info
* \param ctx generic message digest context. May not be NULL. The
* digest-specific context (ctx->md_ctx) must be NULL. It will
* be allocated, and must be freed using md_free() later.
* \param ctx generic message digest context.
*
* \returns 0 on success, 1 if parameter verification fails.
*/
int md_starts( const md_info_t *md_info, md_context_t *ctx );
int md_starts( md_context_t *ctx );
/**
* \brief Generic message digest process buffer
@ -217,17 +240,6 @@ int md_update( md_context_t *ctx, const unsigned char *input, int ilen );
*/
int md_finish( md_context_t *ctx, unsigned char *output );
/**
* \brief Free the message-specific context of ctx. Freeing ctx itself
* remains the responsibility of the caller.
*
* \param ctx Free the -specific context
* \param output Generic message digest checksum result
*
* \returns 0 on success, 1 if parameter verification fails.
*/
int md_free_ctx( md_context_t *ctx );
/**
* \brief Output = message_digest( input buffer )
*
@ -256,15 +268,13 @@ int md_file( const md_info_t *md_info, const char *path, unsigned char *output )
/**
* \brief Generic HMAC context setup
*
* \param md_info message digest info
* \param ctx HMAC context to be initialized
* \param key HMAC secret key
* \param keylen length of the HMAC key
*
* \returns 0 on success, 1 if parameter verification fails.
*/
int md_hmac_starts( const md_info_t *md_info, md_context_t *ctx,
const unsigned char *key, int keylen );
int md_hmac_starts( md_context_t *ctx, const unsigned char *key, int keylen );
/**
* \brief Generic HMAC process buffer