tls_error_set
tls_error_set(error, "failed to open %s file '%s'",
tls_error_set(error, "failed to stat %s file '%s'",
tls_error_set(error, "failed to allocate buffer for "
tls_error_set(error, "failed to read %s file '%s'",
int tls_error_set(struct tls_error *error, const char *fmt, ...)
tls_error_set(error, "keypair has no certificate");
tls_error_set(error, "failed to create certificate bio");
tls_error_set(error, "failed to load certificate: %s", errstr);
tls_error_set(&signer->error, "failed to create key entry");
tls_error_set(&signer->error, "RSA signature");
tls_error_set(&signer->error, "ECDSA signature");