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Try to prevent some misuse of RSA functions

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fixes #331
This commit is contained in:
Manuel Pégourié-Gonnard 2015-10-30 10:56:25 +01:00
parent f7a4688257
commit fb84d38b45
2 changed files with 6 additions and 2 deletions
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4
include/mbedtls/pk.h
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@ -321,7 +321,7 @@ int mbedtls_pk_verify_ext( mbedtls_pk_type_t type, const void *options,
/**
* \brief Make signature, including padding if relevant.
*
* \param ctx PK context to use
* \param ctx PK context to use - must hold a private key
* \param md_alg Hash algorithm used (see notes)
* \param hash Hash of the message to sign
* \param hash_len Hash length or 0 (see notes)
@ -350,7 +350,7 @@ int mbedtls_pk_sign( mbedtls_pk_context *ctx, mbedtls_md_type_t md_alg,
/**
* \brief Decrypt message (including padding if relevant).
*
* \param ctx PK context to use
* \param ctx PK context to use - must hold a private key
* \param input Input to decrypt
* \param ilen Input size
* \param output Decrypted output

4
library/rsa.c
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@ -359,6 +359,10 @@ int mbedtls_rsa_private( mbedtls_rsa_context *ctx,
size_t olen;
mbedtls_mpi T, T1, T2;
/* Make sure we have private key info, prevent possible misuse */
if( ctx->P.p == NULL || ctx->Q.p == NULL || ctx->D.p == NULL )
return( MBEDTLS_ERR_RSA_BAD_INPUT_DATA );
mbedtls_mpi_init( &T ); mbedtls_mpi_init( &T1 ); mbedtls_mpi_init( &T2 );
#if defined(MBEDTLS_THREADING_C)