int mbedtls_ecdsa_write_signature_det( mbedtls_ecdsa_context *ctx,
const unsigned char *hash, size_t hlen,
unsigned char *sig, size_t *slen,
mbedtls_md_type_t md_alg )
{
return( mbedtls_ecdsa_write_signature( ctx, md_alg, hash, hlen, sig, slen,
NULL, NULL ) );
}
static int ecdsa_sign_wrap( void *ctx, mbedtls_md_type_t md_alg,
const unsigned char *hash, size_t hash_len,
unsigned char *sig, size_t *sig_len,
int (*f_rng)(void *, unsigned char *, size_t), void *p_rng )
{
return( mbedtls_ecdsa_write_signature( (mbedtls_ecdsa_context *) ctx,
md_alg, hash, hash_len, sig, sig_len, f_rng, p_rng ) );
}
tt_result_t tt_ecdsa_sign(IN tt_ecdsa_t *dsa,
IN tt_u8_t *input,
IN tt_u32_t len,
IN tt_md_type_t md_type,
IN tt_md_type_t sig_md,
OUT tt_u8_t *sig,
IN OUT tt_u32_t *sig_len)
{
mbedtls_ecdsa_context *ctx = &dsa->ctx;
mbedtls_md_type_t t;
const mbedtls_md_info_t *md_type_info;
tt_u8_t hash[MBEDTLS_MD_MAX_SIZE];
tt_u32_t hashlen;
size_t slen = *sig_len;
int e;
t = tt_g_md_type_map[md_type];
md_type_info = mbedtls_md_info_from_type(t);
mbedtls_md(md_type_info, input, len, hash);
hashlen = mbedtls_md_get_size(md_type_info);
e = mbedtls_ecdsa_write_signature(ctx,
tt_g_md_type_map[sig_md],
hash,
hashlen,
sig,
&slen,
tt_ctr_drbg,
tt_current_ctr_drbg());
if (e != 0) {
tt_crypto_error("ecdsa sign failed");
return TT_FAIL;
}
*sig_len = (tt_u32_t)slen;
return TT_SUCCESS;
}
