defensive-coding-guide/modules/ROOT/examples/Features-TLS-OpenSSL-Errors.adoc
2022-01-13 20:42:40 +01:00

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static void __attribute__((noreturn))
ssl_print_error_and_exit(SSL *ssl, const char *op, int ret)
{
int subcode = SSL_get_error(ssl, ret);
switch (subcode) {
case SSL_ERROR_NONE:
fprintf(stderr, "error: %s: no error to report\n", op);
break;
case SSL_ERROR_WANT_READ:
case SSL_ERROR_WANT_WRITE:
case SSL_ERROR_WANT_X509_LOOKUP:
case SSL_ERROR_WANT_CONNECT:
case SSL_ERROR_WANT_ACCEPT:
fprintf(stderr, "error: %s: invalid blocking state %d\n", op, subcode);
break;
case SSL_ERROR_SSL:
fprintf(stderr, "error: %s: TLS layer problem\n", op);
case SSL_ERROR_SYSCALL:
fprintf(stderr, "error: %s: system call failed: %s\n", op, strerror(errno));
break;
case SSL_ERROR_ZERO_RETURN:
fprintf(stderr, "error: %s: zero return\n", op);
}
exit(1);
}