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Change size of preallocated buffer for pk_sign() calls

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This commit is contained in:
k-stachowiak
2019-05-31 20:11:26 +02:00
parent 31d1432233
commit c4638cc640
3 changed files with 33 additions and 3 deletions
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12
library/x509write_csr.c
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@@ -49,6 +49,16 @@
#include "mbedtls/pem.h"
#endif
/*
* For the currently used signature algorithms the buffer to store any signature
* must be at least of size MAX(MBEDTLS_ECDSA_MAX_LEN, MBEDTLS_MPI_MAX_SIZE)
*/
#if MBEDTLS_ECDSA_MAX_LEN > MBEDTLS_MPI_MAX_SIZE
#define SIGNATURE_MAX_SIZE MBEDTLS_ECDSA_MAX_LEN
#else
#define SIGNATURE_MAX_SIZE MBEDTLS_MPI_MAX_SIZE
#endif
void mbedtls_x509write_csr_init( mbedtls_x509write_csr *ctx )
{
memset( ctx, 0, sizeof( mbedtls_x509write_csr ) );
@@ -138,7 +148,7 @@ int mbedtls_x509write_csr_der( mbedtls_x509write_csr *ctx, unsigned char *buf, s
size_t sig_oid_len = 0;
unsigned char *c, *c2;
unsigned char hash[64];
unsigned char sig[MBEDTLS_MPI_MAX_SIZE];
unsigned char sig[SIGNATURE_MAX_SIZE];
unsigned char tmp_buf[2048];
size_t pub_len = 0, sig_and_oid_len = 0, sig_len;
size_t len = 0;