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Include detailed OpenSSL error messages

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Fixes qpdf/qpdf#450
This commit is contained in:
Dean Scarff 2020-07-02 12:40:33 +10:00 committed by Jay Berkenbilt
parent 3fc7c99d02
commit 2ff84aa2c9
1 changed files with 11 additions and 1 deletions
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12
libqpdf/QPDFCrypto_openssl.cc
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@ -2,6 +2,9 @@
#include <cstring> #include <cstring>
#include <stdexcept> #include <stdexcept>
#include <string>
#include <openssl/err.h>
#include <qpdf/QIntC.hh> #include <qpdf/QIntC.hh>
@ -18,8 +21,15 @@ check_openssl(int status)
{ {
if (status != 1) if (status != 1)
{ {
throw std::runtime_error("openssl error"); // OpenSSL creates a "queue" of errors; copy the first (innermost)
// error to the exception message.
char buf[256] = "";
ERR_error_string_n(ERR_get_error(), buf, sizeof(buf));
std::string what = "OpenSSL error: ";
what += buf;
throw std::runtime_error(what);
} }
ERR_clear_error();
} }
QPDFCrypto_openssl::QPDFCrypto_openssl() : QPDFCrypto_openssl::QPDFCrypto_openssl() :