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Improve documentation of SHA-512 parameter preconditions

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This commit is contained in:
Hanno Becker 2018-12-18 15:29:32 +00:00
parent ff1052e6b0
commit b5c99f5c72
1 changed files with 60 additions and 53 deletions
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113
include/mbedtls/sha512.h
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@ -71,25 +71,26 @@ mbedtls_sha512_context;
/** /**
* \brief This function initializes a SHA-512 context. * \brief This function initializes a SHA-512 context.
* *
* \param ctx The SHA-512 context to initialize. * \param ctx The SHA-512 context to initialize. This must
* Must not be \c NULL. * not be \c NULL.
*/ */
void mbedtls_sha512_init( mbedtls_sha512_context *ctx ); void mbedtls_sha512_init( mbedtls_sha512_context *ctx );
/** /**
* \brief This function clears a SHA-512 context. * \brief This function clears a SHA-512 context.
* *
* \param ctx The SHA-512 context to clear. * \param ctx The SHA-512 context to clear. This may be \c NULL,
* in which case this function does nothing. If it
* is not \c NULL, it must point to an initialized
* SHA-512 context.
*/ */
void mbedtls_sha512_free( mbedtls_sha512_context *ctx ); void mbedtls_sha512_free( mbedtls_sha512_context *ctx );
/** /**
* \brief This function clones the state of a SHA-512 context. * \brief This function clones the state of a SHA-512 context.
* *
* \param dst The destination context. * \param dst The destination context. This must be initialized.
* Must not be \c NULL. * \param src The context to clone. This must be initialized.
* \param src The context to clone.
* Must not be \c NULL.
*/ */
void mbedtls_sha512_clone( mbedtls_sha512_context *dst, void mbedtls_sha512_clone( mbedtls_sha512_context *dst,
const mbedtls_sha512_context *src ); const mbedtls_sha512_context *src );
@ -98,12 +99,12 @@ void mbedtls_sha512_clone( mbedtls_sha512_context *dst,
* \brief This function starts a SHA-384 or SHA-512 checksum * \brief This function starts a SHA-384 or SHA-512 checksum
* calculation. * calculation.
* *
* \param ctx The SHA-512 context to initialize. * \param ctx The SHA-512 context to use. This must be initialized.
* Must not be \c NULL. * \param is384 Determines which function to use. This must be
* \param is384 Determines which function to use: * either \c for SHA-512, or \c 1 for SHA-384.
* 0: Use SHA-512, or 1: Use SHA-384.
* *
* \return \c 0 on success. * \return \c 0 on success.
* \return A negative error code on failure.
*/ */
int mbedtls_sha512_starts_ret( mbedtls_sha512_context *ctx, int is384 ); int mbedtls_sha512_starts_ret( mbedtls_sha512_context *ctx, int is384 );
@ -111,13 +112,15 @@ int mbedtls_sha512_starts_ret( mbedtls_sha512_context *ctx, int is384 );
* \brief This function feeds an input buffer into an ongoing * \brief This function feeds an input buffer into an ongoing
* SHA-512 checksum calculation. * SHA-512 checksum calculation.
* *
* \param ctx The SHA-512 context. * \param ctx The SHA-512 context. This must be initialized
* Must not be \c NULL. * and have a hash operation started.
* \param input The buffer holding the input data. * \param input The buffer holding the input data. This must
* Must not be \c NULL if \p ilen is greater than 0. * be a readable buffer of length \p ilen Bytes.
* \param ilen The length of the input data. * It must not be \c NULL.
* \param ilen The length of the input data \p input in Bytes.
* *
* \return \c 0 on success. * \return \c 0 on success.
* \return A negative error code on failure.
*/ */
int mbedtls_sha512_update_ret( mbedtls_sha512_context *ctx, int mbedtls_sha512_update_ret( mbedtls_sha512_context *ctx,
const unsigned char *input, const unsigned char *input,
@ -128,12 +131,13 @@ int mbedtls_sha512_update_ret( mbedtls_sha512_context *ctx,
* the result to the output buffer. This function is for * the result to the output buffer. This function is for
* internal use only. * internal use only.
* *
* \param ctx The SHA-512 context. * \param ctx The SHA-512 context. This must be initialized
* Must not be \c NULL. * and have a hash operation started.
* \param output The SHA-384 or SHA-512 checksum result. * \param output The SHA-384 or SHA-512 checksum result.
* Must not be \c NULL. * This must be a writable buffer of length \c 64 Bytes.
* *
* \return \c 0 on success. * \return \c 0 on success.
* \return A negative error code on failure.
*/ */
int mbedtls_sha512_finish_ret( mbedtls_sha512_context *ctx, int mbedtls_sha512_finish_ret( mbedtls_sha512_context *ctx,
unsigned char output[64] ); unsigned char output[64] );
@ -142,12 +146,13 @@ int mbedtls_sha512_finish_ret( mbedtls_sha512_context *ctx,
* \brief This function processes a single data block within * \brief This function processes a single data block within
* the ongoing SHA-512 computation. * the ongoing SHA-512 computation.
* *
* \param ctx The SHA-512 context. * \param ctx The SHA-512 context. This must be initialized
* Must not be \c NULL. * and have a hash operation started.
* \param data The buffer holding one block of data. * \param data The buffer holding one block of data. This
* Must not be \c NULL. * must be a readable buffer of length \c 128 Bytes.
* *
* \return \c 0 on success. * \return \c 0 on success.
* \return A negative error code on failure.
*/ */
int mbedtls_internal_sha512_process( mbedtls_sha512_context *ctx, int mbedtls_internal_sha512_process( mbedtls_sha512_context *ctx,
const unsigned char data[128] ); const unsigned char data[128] );
@ -163,10 +168,9 @@ int mbedtls_internal_sha512_process( mbedtls_sha512_context *ctx,
* *
* \deprecated Superseded by mbedtls_sha512_starts_ret() in 2.7.0 * \deprecated Superseded by mbedtls_sha512_starts_ret() in 2.7.0
* *
* \param ctx The SHA-512 context to initialize. * \param ctx The SHA-512 context to use. This must be initialized.
* Must not be \c NULL. * \param is384 Determines which function to use. This must be either
* \param is384 Determines which function to use: * \c 0 for SHA-512 or \c 1 for SHA-384.
* 0: Use SHA-512, or 1: Use SHA-384.
*/ */
MBEDTLS_DEPRECATED void mbedtls_sha512_starts( mbedtls_sha512_context *ctx, MBEDTLS_DEPRECATED void mbedtls_sha512_starts( mbedtls_sha512_context *ctx,
int is384 ); int is384 );
@ -177,11 +181,11 @@ MBEDTLS_DEPRECATED void mbedtls_sha512_starts( mbedtls_sha512_context *ctx,
* *
* \deprecated Superseded by mbedtls_sha512_update_ret() in 2.7.0. * \deprecated Superseded by mbedtls_sha512_update_ret() in 2.7.0.
* *
* \param ctx The SHA-512 context. * \param ctx The SHA-512 context. This must be initialized
* Must not be \c NULL. * and have a hash operation started.
* \param input The buffer holding the data. * \param input The buffer holding the data. This must be a readable
* Must not be \c NULL if \p ilen is greater than 0. * buffer of length \p ilen Bytes. It must not be \c NULL.
* \param ilen The length of the input data. * \param ilen The length of the input data \p input in Bytes.
*/ */
MBEDTLS_DEPRECATED void mbedtls_sha512_update( mbedtls_sha512_context *ctx, MBEDTLS_DEPRECATED void mbedtls_sha512_update( mbedtls_sha512_context *ctx,
const unsigned char *input, const unsigned char *input,
@ -193,10 +197,10 @@ MBEDTLS_DEPRECATED void mbedtls_sha512_update( mbedtls_sha512_context *ctx,
* *
* \deprecated Superseded by mbedtls_sha512_finish_ret() in 2.7.0. * \deprecated Superseded by mbedtls_sha512_finish_ret() in 2.7.0.
* *
* \param ctx The SHA-512 context. * \param ctx The SHA-512 context. This must be initialized
* Must not be \c NULL. * and have a hash operation started.
* \param output The SHA-384 or SHA-512 checksum result. * \param output The SHA-384 or SHA-512 checksum result. This must
* Must not be \c NULL. * be a writable buffer of size \c 64 Bytes.
*/ */
MBEDTLS_DEPRECATED void mbedtls_sha512_finish( mbedtls_sha512_context *ctx, MBEDTLS_DEPRECATED void mbedtls_sha512_finish( mbedtls_sha512_context *ctx,
unsigned char output[64] ); unsigned char output[64] );
@ -208,10 +212,10 @@ MBEDTLS_DEPRECATED void mbedtls_sha512_finish( mbedtls_sha512_context *ctx,
* *
* \deprecated Superseded by mbedtls_internal_sha512_process() in 2.7.0. * \deprecated Superseded by mbedtls_internal_sha512_process() in 2.7.0.
* *
* \param ctx The SHA-512 context. * \param ctx The SHA-512 context. This must be initialized and
* Must not be \c NULL. * have a hash operation started.
* \param data The buffer holding one block of data. * \param data The buffer holding one block of data. This must be
* Must not be \c NULL. * a readable buffer of length \c 128 Bytes.
*/ */
MBEDTLS_DEPRECATED void mbedtls_sha512_process( MBEDTLS_DEPRECATED void mbedtls_sha512_process(
mbedtls_sha512_context *ctx, mbedtls_sha512_context *ctx,
@ -230,15 +234,17 @@ MBEDTLS_DEPRECATED void mbedtls_sha512_process(
* The SHA-512 result is calculated as * The SHA-512 result is calculated as
* output = SHA-512(input buffer). * output = SHA-512(input buffer).
* *
* \param input The buffer holding the input data. * \param input The buffer holding the input data. This must be
* Must not be \c NULL if \p ilen is greater than 0. * a readable buffer of length \p ilen Bytes. It
* \param ilen The length of the input data. * must not be \c NULL.
* \param ilen The length of the input data \p input in Bytes.
* \param output The SHA-384 or SHA-512 checksum result. * \param output The SHA-384 or SHA-512 checksum result.
* Must not be \c NULL. * This must be a writable buffer of length \c 64 Bytes.
* \param is384 Determines which function to use: * \param is384 Determines which function to use. This must be either
* 0: Use SHA-512, or 1: Use SHA-384. * \c 0 for SHA-512, or \c 1 for SHA-384.
* *
* \return \c 0 on success. * \return \c 0 on success.
* \return A negative error code on failure.
*/ */
int mbedtls_sha512_ret( const unsigned char *input, int mbedtls_sha512_ret( const unsigned char *input,
size_t ilen, size_t ilen,
@ -263,13 +269,14 @@ int mbedtls_sha512_ret( const unsigned char *input,
* *
* \deprecated Superseded by mbedtls_sha512_ret() in 2.7.0 * \deprecated Superseded by mbedtls_sha512_ret() in 2.7.0
* *
* \param input The buffer holding the data. * \param input The buffer holding the data. This must be a
* Must not be \c NULL if \p ilen is greater than 0. * readable buffer of length \p ilen Bytes. It
* \param ilen The length of the input data. * must not be \c NULL.
* \param output The SHA-384 or SHA-512 checksum result. * \param ilen The length of the input data \p input in Bytes.
* Must not be \c NULL. * \param output The SHA-384 or SHA-512 checksum result. This must
* \param is384 Determines which function to use: * be a writable buffer of length \c 64 Bytes.
* 0: Use SHA-512, or 1: Use SHA-384. * \param is384 Determines which function to use. This must be eiher
* \c 0 for SHA-512, or \c 1 for SHA-384.
*/ */
MBEDTLS_DEPRECATED void mbedtls_sha512( const unsigned char *input, MBEDTLS_DEPRECATED void mbedtls_sha512( const unsigned char *input,
size_t ilen, size_t ilen,