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Add documentation notes about the required size of the signature buffers

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Gilles Peskine 2019-11-08 18:39:22 +01:00
parent ff25af2c15
commit 73a1f377f0
1 changed files with 6 additions and 3 deletions
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9
include/mbedtls/rsa.h
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@ -907,7 +907,8 @@ int mbedtls_rsa_rsaes_oaep_decrypt( mbedtls_rsa_context *ctx,
* the size of the hash corresponding to \p md_alg. * the size of the hash corresponding to \p md_alg.
* \param sig The buffer to hold the signature. This must be a writable * \param sig The buffer to hold the signature. This must be a writable
* buffer of length \c ctx->len Bytes. For example, \c 256 Bytes * buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
* for an 2048-bit RSA modulus. * for an 2048-bit RSA modulus. A buffer length of
* #MBEDTLS_MPI_MAX_SIZE is always safe.
* *
* \return \c 0 if the signing operation was successful. * \return \c 0 if the signing operation was successful.
* \return An \c MBEDTLS_ERR_RSA_XXX error code on failure. * \return An \c MBEDTLS_ERR_RSA_XXX error code on failure.
@ -954,7 +955,8 @@ int mbedtls_rsa_pkcs1_sign( mbedtls_rsa_context *ctx,
* the size of the hash corresponding to \p md_alg. * the size of the hash corresponding to \p md_alg.
* \param sig The buffer to hold the signature. This must be a writable * \param sig The buffer to hold the signature. This must be a writable
* buffer of length \c ctx->len Bytes. For example, \c 256 Bytes * buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
* for an 2048-bit RSA modulus. * for an 2048-bit RSA modulus. A buffer length of
* #MBEDTLS_MPI_MAX_SIZE is always safe.
* *
* \return \c 0 if the signing operation was successful. * \return \c 0 if the signing operation was successful.
* \return An \c MBEDTLS_ERR_RSA_XXX error code on failure. * \return An \c MBEDTLS_ERR_RSA_XXX error code on failure.
@ -1015,7 +1017,8 @@ int mbedtls_rsa_rsassa_pkcs1_v15_sign( mbedtls_rsa_context *ctx,
* the size of the hash corresponding to \p md_alg. * the size of the hash corresponding to \p md_alg.
* \param sig The buffer to hold the signature. This must be a writable * \param sig The buffer to hold the signature. This must be a writable
* buffer of length \c ctx->len Bytes. For example, \c 256 Bytes * buffer of length \c ctx->len Bytes. For example, \c 256 Bytes
* for an 2048-bit RSA modulus. * for an 2048-bit RSA modulus. A buffer length of
* #MBEDTLS_MPI_MAX_SIZE is always safe.
* *
* \return \c 0 if the signing operation was successful. * \return \c 0 if the signing operation was successful.
* \return An \c MBEDTLS_ERR_RSA_XXX error code on failure. * \return An \c MBEDTLS_ERR_RSA_XXX error code on failure.