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Clarify the need for a PRNG in various RSA operations

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Hanno Becker 2018-12-18 14:45:45 +00:00
parent b06f193d73
commit a9020f2107
1 changed files with 30 additions and 21 deletions
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51
include/mbedtls/rsa.h
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@ -588,9 +588,12 @@ int mbedtls_rsa_private( mbedtls_rsa_context *ctx,
* return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
* *
* \param ctx The initialized RSA context to use. * \param ctx The initialized RSA context to use.
* \param f_rng This is the RNG function used to generate the * \param f_rng The RNG to use. If PKCS#1 v2.1 padding encoding is
* PKCS#1 v2.1 padding encoding if \p mode is * used, this must be provided. Additionally, it is
* #MBEDTLS_RSA_PRIVATE. * used for blinding if \p mode is #MBEDTLS_RSA_PRIVATE
* and should be provided in this case; see
* mbedtls_rsa_private() for more. It is ignored
* for PKCS#1 v1.5 padding with #MBEDTLS_RSA_PUBLIC.
* \param p_rng The RNG context to be passed to \p f_rng. May be * \param p_rng The RNG context to be passed to \p f_rng. May be
* \c NULL if \p f_rng is \c NULL or if \p f_rng doesn't * \c NULL if \p f_rng is \c NULL or if \p f_rng doesn't
* need a context argument. * need a context argument.
@ -628,8 +631,10 @@ int mbedtls_rsa_pkcs1_encrypt( mbedtls_rsa_context *ctx,
* return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
* *
* \param ctx The initialized RSA context to use. * \param ctx The initialized RSA context to use.
* \param f_rng The RNG function, needed for padding generation if * \param f_rng The RNG function to use. It is needed for padding generation
* \p mode is #MBEDTLS_RSA_PRIVATE. * if \p mode is #MBEDTLS_RSA_PUBLIC. If \p mode is
* #MBEDTLS_RSA_PRIVATE (discouraged), it is used for
* blinding and should be provided; see mbedtls_rsa_private().
* \param p_rng The RNG context to be passed to \p f_rng. This may * \param p_rng The RNG context to be passed to \p f_rng. This may
* be \c NULL if \p f_rng is \c NULL or if \p f_rng * be \c NULL if \p f_rng is \c NULL or if \p f_rng
* doesn't need a context argument. * doesn't need a context argument.
@ -670,11 +675,10 @@ int mbedtls_rsa_rsaes_pkcs1_v15_encrypt( mbedtls_rsa_context *ctx,
* return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
* *
* \param ctx The initnialized RSA context to use. * \param ctx The initnialized RSA context to use.
* \param f_rng The RNG function, needed for padding and PKCS#1 v2.1 * \param f_rng The RNG function to use. This is needed for padding
* encoding if \p mode is #MBEDTLS_RSA_PRIVATE. * generation and must be provided.
* \param p_rng The RNG context to be passed to \p f_rng. This may * \param p_rng The RNG context to be passed to \p f_rng. This may
* be \c NULL if \p f_rng is \c NULL or if \p f_rng * be \c NULL if \p f_rng doesn't need a context argument.
* doesn't need a context argument.
* \param mode The mode of operation. This must be either * \param mode The mode of operation. This must be either
* #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE (deprecated). * #MBEDTLS_RSA_PUBLIC or #MBEDTLS_RSA_PRIVATE (deprecated).
* \param label The buffer holding the custom label to use. * \param label The buffer holding the custom label to use.
@ -883,10 +887,11 @@ int mbedtls_rsa_rsaes_oaep_decrypt( mbedtls_rsa_context *ctx,
* return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
* *
* \param ctx The initialized RSA context to use. * \param ctx The initialized RSA context to use.
* \param f_rng The RNG function. If the padding mode is PKCS#1 v2.1 * \param f_rng The RNG function to use. If the padding mode is PKCS#1 v2.1,
* and \p mode is set to #MBEDTLS_RSA_PRIVATE, it is used for * this must be provided. If the padding mode is PKCS#1 v1.5 and
* blinding and should be provided; see mbedtls_rsa_private(). * \p mode is #MBEDTLS_RSA_PRIVATE, it is used for blinding
* It is ignored otherwise. * and should be provided; see mbedtls_rsa_private() for more
* more. It is ignored otherwise.
* \param p_rng The RNG context to be passed to \p f_rng. This may be \c NULL * \param p_rng The RNG context to be passed to \p f_rng. This may be \c NULL
* if \p f_rng is \c NULL or doesn't need a context argument. * if \p f_rng is \c NULL or doesn't need a context argument.
* \param mode The mode of operation. This must be either * \param mode The mode of operation. This must be either
@ -1045,8 +1050,9 @@ int mbedtls_rsa_rsassa_pss_sign( mbedtls_rsa_context *ctx,
* return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
* *
* \param ctx The initialized RSA public key context to use. * \param ctx The initialized RSA public key context to use.
* \param f_rng The RNG function to use. This is only needed if * \param f_rng The RNG function to use. If \p mode is #MBEDTLS_RSA_PRIVATE,
* \p mode is #MBEDTLS_RSA_PRIVATE. * this is used for blinding and should be provided; see
* mbedtls_rsa_private() for more. Otherwise, it is ignored.
* \param p_rng The RNG context to be passed to \p f_rng. This may be * \param p_rng The RNG context to be passed to \p f_rng. This may be
* \c NULL if \p f_rng is \c NULL or doesn't need a context. * \c NULL if \p f_rng is \c NULL or doesn't need a context.
* \param mode The mode of operation. This must be either * \param mode The mode of operation. This must be either
@ -1090,8 +1096,9 @@ int mbedtls_rsa_pkcs1_verify( mbedtls_rsa_context *ctx,
* return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
* *
* \param ctx The initialized RSA public key context to use. * \param ctx The initialized RSA public key context to use.
* \param f_rng The RNG function to use. This is only needed if * \param f_rng The RNG function to use. If \p mode is #MBEDTLS_RSA_PRIVATE,
* \p mode is #MBEDTLS_RSA_PRIVATE. * this is used for blinding and should be provided; see
* mbedtls_rsa_private() for more. Otherwise, it is ignored.
* \param p_rng The RNG context to be passed to \p f_rng. This may be * \param p_rng The RNG context to be passed to \p f_rng. This may be
* \c NULL if \p f_rng is \c NULL or doesn't need a context. * \c NULL if \p f_rng is \c NULL or doesn't need a context.
* \param mode The mode of operation. This must be either * \param mode The mode of operation. This must be either
@ -1146,8 +1153,9 @@ int mbedtls_rsa_rsassa_pkcs1_v15_verify( mbedtls_rsa_context *ctx,
* return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED. * return #MBEDTLS_ERR_PLATFORM_FEATURE_UNSUPPORTED.
* *
* \param ctx The initialized RSA public key context to use. * \param ctx The initialized RSA public key context to use.
* \param f_rng The RNG function to use. This is only needed if * \param f_rng The RNG function to use. If \p mode is #MBEDTLS_RSA_PRIVATE,
* \p mode is #MBEDTLS_RSA_PRIVATE. * this is used for blinding and should be provided; see
* mbedtls_rsa_private() for more. Otherwise, it is ignored.
* \param p_rng The RNG context to be passed to \p f_rng. This may be * \param p_rng The RNG context to be passed to \p f_rng. This may be
* \c NULL if \p f_rng is \c NULL or doesn't need a context. * \c NULL if \p f_rng is \c NULL or doesn't need a context.
* \param mode The mode of operation. This must be either * \param mode The mode of operation. This must be either
@ -1190,8 +1198,9 @@ int mbedtls_rsa_rsassa_pss_verify( mbedtls_rsa_context *ctx,
* \note The \p hash_id in the RSA context is ignored. * \note The \p hash_id in the RSA context is ignored.
* *
* \param ctx The initialized RSA public key context to use. * \param ctx The initialized RSA public key context to use.
* \param f_rng The RNG function to use. This is only needed if * \param f_rng The RNG function to use. If \p mode is #MBEDTLS_RSA_PRIVATE,
* \p mode is #MBEDTLS_RSA_PRIVATE. * this is used for blinding and should be provided; see
* mbedtls_rsa_private() for more. Otherwise, it is ignored.
* \param p_rng The RNG context to be passed to \p f_rng. This may be * \param p_rng The RNG context to be passed to \p f_rng. This may be
* \c NULL if \p f_rng is \c NULL or doesn't need a context. * \c NULL if \p f_rng is \c NULL or doesn't need a context.
* \param mode The mode of operation. This must be either * \param mode The mode of operation. This must be either