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Merge pull request #2999 from catenacyber/fuzzrsa

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Checks mbedtls_rsa_export return in fuzz targets
This commit is contained in:
Gilles Peskine 2020-01-31 16:38:43 +01:00 committed by GitHub
commit 36ce88be1e
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2 changed files with 14 additions and 4 deletions
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9
programs/fuzz/fuzz_privkey.c
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@ -1,4 +1,5 @@
#include <stdint.h> #include <stdint.h>
#include <stdlib.h>
#include "mbedtls/pk.h" #include "mbedtls/pk.h"
//4 Kb should be enough for every bug ;-) //4 Kb should be enough for every bug ;-)
@ -29,8 +30,12 @@ int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
mbedtls_mpi_init( &DQ ); mbedtls_mpi_init( &QP ); mbedtls_mpi_init( &DQ ); mbedtls_mpi_init( &QP );
rsa = mbedtls_pk_rsa( pk ); rsa = mbedtls_pk_rsa( pk );
mbedtls_rsa_export( rsa, &N, &P, &Q, &D, &E ); if ( mbedtls_rsa_export( rsa, &N, &P, &Q, &D, &E ) != 0 ) {
mbedtls_rsa_export_crt( rsa, &DP, &DQ, &QP ); abort();
}
if ( mbedtls_rsa_export_crt( rsa, &DP, &DQ, &QP ) != 0 ) {
abort();
}
mbedtls_mpi_free( &N ); mbedtls_mpi_free( &P ); mbedtls_mpi_free( &Q ); mbedtls_mpi_free( &N ); mbedtls_mpi_free( &P ); mbedtls_mpi_free( &Q );
mbedtls_mpi_free( &D ); mbedtls_mpi_free( &E ); mbedtls_mpi_free( &DP ); mbedtls_mpi_free( &D ); mbedtls_mpi_free( &E ); mbedtls_mpi_free( &DP );

9
programs/fuzz/fuzz_pubkey.c
View File

@ -1,4 +1,5 @@
#include <stdint.h> #include <stdint.h>
#include <stdlib.h>
#include "mbedtls/pk.h" #include "mbedtls/pk.h"
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
@ -20,8 +21,12 @@ int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
mbedtls_mpi_init( &DQ ); mbedtls_mpi_init( &QP ); mbedtls_mpi_init( &DQ ); mbedtls_mpi_init( &QP );
rsa = mbedtls_pk_rsa( pk ); rsa = mbedtls_pk_rsa( pk );
ret = mbedtls_rsa_export( rsa, &N, &P, &Q, &D, &E ); if ( mbedtls_rsa_export( rsa, &N, &P, &Q, &D, &E ) != 0 ) {
ret = mbedtls_rsa_export_crt( rsa, &DP, &DQ, &QP ); abort();
}
if ( mbedtls_rsa_export_crt( rsa, &DP, &DQ, &QP ) != MBEDTLS_ERR_RSA_BAD_INPUT_DATA ) {
abort();
}
mbedtls_mpi_free( &N ); mbedtls_mpi_free( &P ); mbedtls_mpi_free( &Q ); mbedtls_mpi_free( &N ); mbedtls_mpi_free( &P ); mbedtls_mpi_free( &Q );
mbedtls_mpi_free( &D ); mbedtls_mpi_free( &E ); mbedtls_mpi_free( &DP ); mbedtls_mpi_free( &D ); mbedtls_mpi_free( &E ); mbedtls_mpi_free( &DP );