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bpftool: Allow bpftool to build with openssl < 3

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ERR_get_error_all()[1] is a openssl v3 API, so to make code
compatible with openssl v1 utilize ERR_get_err_line_data
instead.  Since openssl is already a build requirement for
the kernel (minimum requirement openssl 1.0.0), this will
allow bpftool to compile where opensslv3 is not available.
Signing-related BPF selftests pass with openssl v1.

[1] https://docs.openssl.org/3.4/man3/ERR_get_error/

Fixes: 40863f4d6e ("bpftool: Add support for signing BPF programs")
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Acked-by: Song Liu <song@kernel.org>
Acked-by: Quentin Monnet <qmo@kernel.org>
Link: https://lore.kernel.org/r/20251120084754.640405-2-alan.maguire@oracle.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Alan Maguire
2025-11-20 08:47:53 +00:00
committed by Alexei Starovoitov
parent acf8726466
commit 90ae54b4c7
1 changed files with 6 additions and 0 deletions
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6
tools/bpf/bpftool/sign.c
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@@ -28,6 +28,12 @@
#define OPEN_SSL_ERR_BUF_LEN 256
/* Use deprecated in 3.0 ERR_get_error_line_data for openssl < 3 */
#if !defined(OPENSSL_VERSION_MAJOR) || (OPENSSL_VERSION_MAJOR < 3)
#define ERR_get_error_all(file, line, func, data, flags) \
ERR_get_error_line_data(file, line, data, flags)
#endif
static void display_openssl_errors(int l)
{
char buf[OPEN_SSL_ERR_BUF_LEN];