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SSL: the $ssl_client_sha256_fingerprint variable

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Just like $ssl_client_fingerprint but SHA256 instead of SHA1

SHA1 is insecure and its use should be discouraged, see:

https://sha-mbles.github.io/
https://shattered.io/
This commit is contained in:
Shelvacu 2024-12-01 23:00:05 -08:00 committed by Shelvacu on fw
parent e28ef42b97
commit 4ec2275b05
4 changed files with 26 additions and 2 deletions
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18
src/event/ngx_event_openssl.c
View File

@ -5616,7 +5616,7 @@ ngx_ssl_get_serial_number(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
ngx_int_t
ngx_ssl_get_fingerprint(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
ngx_ssl_get_fingerprint_with_digest(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s, const EVP_MD *digest)
{
X509 *cert;
unsigned int len;
@ -5629,7 +5629,7 @@ ngx_ssl_get_fingerprint(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
return NGX_OK;
}
if (!X509_digest(cert, EVP_sha1(), buf, &len)) {
if (!X509_digest(cert, digest, buf, &len)) {
ngx_ssl_error(NGX_LOG_ALERT, c->log, 0, "X509_digest() failed");
X509_free(cert);
return NGX_ERROR;
@ -5650,6 +5650,20 @@ ngx_ssl_get_fingerprint(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
}
ngx_int_t
ngx_ssl_get_fingerprint(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
return ngx_ssl_get_fingerprint_with_digest(c, pool, s, EVP_sha1());
}
ngx_int_t
ngx_ssl_get_sha256_fingerprint(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{
return ngx_ssl_get_fingerprint_with_digest(c, pool, s, EVP_sha256());
}
ngx_int_t
ngx_ssl_get_client_verify(ngx_connection_t *c, ngx_pool_t *pool, ngx_str_t *s)
{

4
src/event/ngx_event_openssl.h
View File

@ -320,8 +320,12 @@ ngx_int_t ngx_ssl_get_issuer_dn_legacy(ngx_connection_t *c, ngx_pool_t *pool,
ngx_str_t *s);
ngx_int_t ngx_ssl_get_serial_number(ngx_connection_t *c, ngx_pool_t *pool,
ngx_str_t *s);
ngx_int_t ngx_ssl_get_fingerprint_with_digest(ngx_connection_t *c, ngx_pool_t *pool,
ngx_str_t *s, const EVP_MD *digest);
ngx_int_t ngx_ssl_get_fingerprint(ngx_connection_t *c, ngx_pool_t *pool,
ngx_str_t *s);
ngx_int_t ngx_ssl_get_sha256_fingerprint(ngx_connection_t *c, ngx_pool_t *pool,
ngx_str_t *s);
ngx_int_t ngx_ssl_get_client_verify(ngx_connection_t *c, ngx_pool_t *pool,
ngx_str_t *s);
ngx_int_t ngx_ssl_get_client_v_start(ngx_connection_t *c, ngx_pool_t *pool,

3
src/http/modules/ngx_http_ssl_module.c
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@ -387,6 +387,9 @@ static ngx_http_variable_t ngx_http_ssl_vars[] = {
{ ngx_string("ssl_client_fingerprint"), NULL, ngx_http_ssl_variable,
(uintptr_t) ngx_ssl_get_fingerprint, NGX_HTTP_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_sha256_fingerprint"), NULL, ngx_http_ssl_variable,
(uintptr_t) ngx_ssl_get_sha256_fingerprint, NGX_HTTP_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_verify"), NULL, ngx_http_ssl_variable,
(uintptr_t) ngx_ssl_get_client_verify, NGX_HTTP_VAR_CHANGEABLE, 0 },

3
src/stream/ngx_stream_ssl_module.c
View File

@ -376,6 +376,9 @@ static ngx_stream_variable_t ngx_stream_ssl_vars[] = {
{ ngx_string("ssl_client_fingerprint"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_fingerprint, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_sha256_fingerprint"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_sha256_fingerprint, NGX_STREAM_VAR_CHANGEABLE, 0 },
{ ngx_string("ssl_client_verify"), NULL, ngx_stream_ssl_variable,
(uintptr_t) ngx_ssl_get_client_verify, NGX_STREAM_VAR_CHANGEABLE, 0 },