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[3.10] gh-118224: Load default OpenSSL provider for nonsecurity algorithms (GH-118236) by xnox · Pull Request #118240 · python/cpython · GitHub

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[3.10] gh-118224: Load default OpenSSL provider for nonsecurity algorithms (GH-118236) #118240

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[3.10] gh-118224: Load default OpenSSL provider for nonsecurity algorithms (GH-118236) #118240

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[3.10] gh-118224: Load default OpenSSL provider for nonsecurity algor…
xnox Apr 24, 2024
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xnox Apr 24, 2024
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1 change: 1 addition & 0 deletions Misc/NEWS.d/next/Build/2024-04-24-16-58-45.gh-issue-118224.wnjFHn.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
Hashlib now supports using default OpenSSL provider instead of builtin fallback for nonsecurity hashes on hosts otherwise only using base and fips providers. This makes build configuration ``--with-builtin-hashlib-hashes=blake2`` fully supported on OpenSSL FIPS hosts.
14 changes: 14 additions & 0 deletions Modules/_hashopenssl.c
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,7 @@
#define PY_OPENSSL_HAS_BLAKE2 1

#if OPENSSL_VERSION_NUMBER >= 0x30000000L
#include <openssl/provider.h>
#define PY_EVP_MD EVP_MD
#define PY_EVP_MD_fetch(algorithm, properties) EVP_MD_fetch(NULL, algorithm, properties)
#define PY_EVP_MD_up_ref(md) EVP_MD_up_ref(md)
Expand Down Expand Up @@ -217,6 +218,17 @@ typedef struct {
_Py_hashtable_t *hashtable;
} _hashlibstate;

static void try_load_default_provider(void) {
#if OPENSSL_VERSION_NUMBER >= 0x30000000L
/* Load the default config file, and expected providers */
OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CONFIG, NULL);
if (!OSSL_PROVIDER_available(NULL, "default")) {
/* System is configured without the default provider */
OSSL_PROVIDER_load(NULL, "default");
}
#endif
}

static inline _hashlibstate*
get_hashlib_state(PyObject *module)
{
Expand Down Expand Up @@ -338,6 +350,7 @@ py_digest_by_name(PyObject *module, const char *name, enum Py_hash_type py_ht)
break;
case Py_ht_evp_nosecurity:
if (entry->evp_nosecurity == NULL) {
try_load_default_provider();
entry->evp_nosecurity = PY_EVP_MD_fetch(entry->ossl_name, "-fips");
}
digest = entry->evp_nosecurity;
Expand All @@ -355,6 +368,7 @@ py_digest_by_name(PyObject *module, const char *name, enum Py_hash_type py_ht)
digest = PY_EVP_MD_fetch(name, NULL);
break;
case Py_ht_evp_nosecurity:
try_load_default_provider();
digest = PY_EVP_MD_fetch(name, "-fips");
break;
}
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