374 lines
16 KiB
Diff
374 lines
16 KiB
Diff
From 4a2239bd7d444c30c55b20ea8b4aeadafdfe1afd Mon Sep 17 00:00:00 2001
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From: Clemens Lang <cllang@redhat.com>
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Date: Fri, 22 Jul 2022 13:59:37 +0200
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Subject: [PATCH] FIPS: Use OAEP in KATs, support fixed OAEP seed
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Review by our lab for FIPS 140-3 certification expects the RSA
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encryption and decryption tests to use a supported padding mode, not raw
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RSA signatures. Switch to RSA-OAEP for the self tests to fulfill that.
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The FIPS 140-3 Implementation Guidance specifies in section 10.3.A
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"Cryptographic Algorithm Self-Test Requirements" that a self-test may be
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a known-answer test, a comparison test, or a fault-detection test.
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Comparison tests are not an option, because they would require
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a separate implementation of RSA-OAEP, which we do not have. Fault
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detection tests require implementing fault detection mechanisms into the
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cryptographic algorithm implementation, we we also do not have.
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As a consequence, a known-answer test must be used to test RSA
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encryption and decryption, but RSA encryption with OAEP padding is not
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deterministic, and thus encryption will always yield different results
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that could not be compared to known answers. For this reason, this
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change explicitly sets the seed in OAEP (see RFC 8017 section 7.1.1),
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which is the source of randomness for RSA-OAEP, to a fixed value. This
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setting is only available during self-test execution, and the parameter
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set using EVP_PKEY_CTX_set_params() will be ignored otherwise.
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Signed-off-by: Clemens Lang <cllang@redhat.com>
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---
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crypto/rsa/rsa_local.h | 8 ++
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crypto/rsa/rsa_oaep.c | 34 ++++++--
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include/openssl/core_names.h | 3 +
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providers/fips/self_test_data.inc | 83 +++++++++++--------
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providers/fips/self_test_kats.c | 7 ++
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.../implementations/asymciphers/rsa_enc.c | 41 ++++++++-
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6 files changed, 133 insertions(+), 43 deletions(-)
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diff --git a/crypto/rsa/rsa_local.h b/crypto/rsa/rsa_local.h
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index ea70da05ad..dde57a1a0e 100644
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--- a/crypto/rsa/rsa_local.h
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+++ b/crypto/rsa/rsa_local.h
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@@ -193,4 +193,12 @@ int ossl_rsa_padding_add_PKCS1_type_2_ex(OSSL_LIB_CTX *libctx, unsigned char *to
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int tlen, const unsigned char *from,
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int flen);
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+int ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex2(OSSL_LIB_CTX *libctx,
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+ unsigned char *to, int tlen,
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+ const unsigned char *from, int flen,
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+ const unsigned char *param,
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+ int plen, const EVP_MD *md,
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+ const EVP_MD *mgf1md,
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+ const char *redhat_st_seed);
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+
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#endif /* OSSL_CRYPTO_RSA_LOCAL_H */
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diff --git a/crypto/rsa/rsa_oaep.c b/crypto/rsa/rsa_oaep.c
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index d9be1a4f98..b2f7f7dc4b 100644
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--- a/crypto/rsa/rsa_oaep.c
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+++ b/crypto/rsa/rsa_oaep.c
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@@ -44,6 +44,10 @@ int RSA_padding_add_PKCS1_OAEP(unsigned char *to, int tlen,
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param, plen, NULL, NULL);
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}
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+#ifdef FIPS_MODULE
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+extern int REDHAT_FIPS_asym_cipher_st;
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+#endif /* FIPS_MODULE */
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+
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/*
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* Perform the padding as per NIST 800-56B 7.2.2.3
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* from (K) is the key material.
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@@ -51,12 +55,13 @@ int RSA_padding_add_PKCS1_OAEP(unsigned char *to, int tlen,
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* Step numbers are included here but not in the constant time inverse below
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* to avoid complicating an already difficult enough function.
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*/
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-int ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex(OSSL_LIB_CTX *libctx,
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- unsigned char *to, int tlen,
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- const unsigned char *from, int flen,
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- const unsigned char *param,
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- int plen, const EVP_MD *md,
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- const EVP_MD *mgf1md)
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+int ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex2(OSSL_LIB_CTX *libctx,
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+ unsigned char *to, int tlen,
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+ const unsigned char *from, int flen,
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+ const unsigned char *param,
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+ int plen, const EVP_MD *md,
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+ const EVP_MD *mgf1md,
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+ const char *redhat_st_seed)
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{
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int rv = 0;
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int i, emlen = tlen - 1;
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@@ -107,6 +112,11 @@ int ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex(OSSL_LIB_CTX *libctx,
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db[emlen - flen - mdlen - 1] = 0x01;
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memcpy(db + emlen - flen - mdlen, from, (unsigned int)flen);
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/* step 3d: generate random byte string */
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+#ifdef FIPS_MODULE
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+ if (redhat_st_seed != NULL && REDHAT_FIPS_asym_cipher_st) {
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+ memcpy(seed, redhat_st_seed, mdlen);
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+ } else
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+#endif
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if (RAND_bytes_ex(libctx, seed, mdlen, 0) <= 0)
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goto err;
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@@ -138,6 +148,18 @@ int ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex(OSSL_LIB_CTX *libctx,
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return rv;
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}
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+int ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex(OSSL_LIB_CTX *libctx,
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+ unsigned char *to, int tlen,
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+ const unsigned char *from, int flen,
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+ const unsigned char *param,
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+ int plen, const EVP_MD *md,
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+ const EVP_MD *mgf1md)
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+{
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+ return ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex2(libctx, to, tlen, from,
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+ flen, param, plen, md,
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+ mgf1md, NULL);
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+}
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+
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int RSA_padding_add_PKCS1_OAEP_mgf1(unsigned char *to, int tlen,
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const unsigned char *from, int flen,
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const unsigned char *param, int plen,
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diff --git a/include/openssl/core_names.h b/include/openssl/core_names.h
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index 59a6e79566..11216fb8f8 100644
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--- a/include/openssl/core_names.h
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+++ b/include/openssl/core_names.h
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@@ -469,6 +469,9 @@ extern "C" {
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#define OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL "oaep-label"
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#define OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION "tls-client-version"
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#define OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION "tls-negotiated-version"
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+#ifdef FIPS_MODULE
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+#define OSSL_ASYM_CIPHER_PARAM_REDHAT_KAT_OEAP_SEED "redhat-kat-oaep-seed"
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+#endif
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/*
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* Encoder / decoder parameters
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diff --git a/providers/fips/self_test_data.inc b/providers/fips/self_test_data.inc
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index 4e30ec56dd..0103c87528 100644
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--- a/providers/fips/self_test_data.inc
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+++ b/providers/fips/self_test_data.inc
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@@ -1294,15 +1294,22 @@ static const ST_KAT_PARAM rsa_priv_key[] = {
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ST_KAT_PARAM_END()
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};
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-/*-
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- * Using OSSL_PKEY_RSA_PAD_MODE_NONE directly in the expansion of the
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- * ST_KAT_PARAM_UTF8STRING macro below causes a failure on ancient
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- * HP/UX PA-RISC compilers.
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- */
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-static const char pad_mode_none[] = OSSL_PKEY_RSA_PAD_MODE_NONE;
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-
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+/*-
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+ * Using OSSL_PKEY_RSA_PAD_MODE_OAEP directly in the expansion of the
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+ * ST_KAT_PARAM_UTF8STRING macro below causes a failure on ancient
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+ * HP/UX PA-RISC compilers.
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+ */
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+static const char pad_mode_oaep[] = OSSL_PKEY_RSA_PAD_MODE_OAEP;
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+static const char oaep_fixed_seed[] = {
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+ 0xf6, 0x10, 0xef, 0x0a, 0x97, 0xbf, 0x91, 0x25,
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+ 0x97, 0xcf, 0x8e, 0x0a, 0x75, 0x51, 0x2f, 0xab,
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+ 0x2e, 0x4b, 0x2c, 0xe6
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+};
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+
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static const ST_KAT_PARAM rsa_enc_params[] = {
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- ST_KAT_PARAM_UTF8STRING(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, pad_mode_none),
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+ ST_KAT_PARAM_UTF8STRING(OSSL_ASYM_CIPHER_PARAM_PAD_MODE, pad_mode_oaep),
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+ ST_KAT_PARAM_OCTET(OSSL_ASYM_CIPHER_PARAM_REDHAT_KAT_OEAP_SEED,
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+ oaep_fixed_seed),
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ST_KAT_PARAM_END()
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};
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@@ -1335,43 +1348,43 @@ static const unsigned char rsa_expected_sig[256] = {
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0x2c, 0x68, 0xf0, 0x37, 0xa9, 0xd2, 0x56, 0xd6
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};
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-static const unsigned char rsa_asym_plaintext_encrypt[256] = {
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+static const unsigned char rsa_asym_plaintext_encrypt[208] = {
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0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
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0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
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};
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static const unsigned char rsa_asym_expected_encrypt[256] = {
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- 0x54, 0xac, 0x23, 0x96, 0x1d, 0x82, 0x5d, 0x8b,
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- 0x8f, 0x36, 0x33, 0xd0, 0xf4, 0x02, 0xa2, 0x61,
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- 0xb1, 0x13, 0xd4, 0x4a, 0x46, 0x06, 0x37, 0x3c,
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- 0xbf, 0x40, 0x05, 0x3c, 0xc6, 0x3b, 0x64, 0xdc,
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- 0x22, 0x22, 0xaf, 0x36, 0x79, 0x62, 0x45, 0xf0,
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- 0x97, 0x82, 0x22, 0x44, 0x86, 0x4a, 0x7c, 0xfa,
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- 0xac, 0x03, 0x21, 0x84, 0x3f, 0x31, 0xad, 0x2a,
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- 0xa4, 0x6e, 0x7a, 0xc5, 0x93, 0xf3, 0x0f, 0xfc,
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- 0xf1, 0x62, 0xce, 0x82, 0x12, 0x45, 0xc9, 0x35,
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- 0xb0, 0x7a, 0xcd, 0x99, 0x8c, 0x91, 0x6b, 0x5a,
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- 0xd3, 0x46, 0xdb, 0xf9, 0x9e, 0x52, 0x49, 0xbd,
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- 0x1e, 0xe8, 0xda, 0xac, 0x61, 0x47, 0xc2, 0xda,
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- 0xfc, 0x1e, 0xfb, 0x74, 0xd7, 0xd6, 0xc1, 0x18,
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- 0x86, 0x3e, 0x20, 0x9c, 0x7a, 0xe1, 0x04, 0xb7,
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- 0x38, 0x43, 0xb1, 0x4e, 0xa0, 0xd8, 0xc1, 0x39,
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- 0x4d, 0xe1, 0xd3, 0xb0, 0xb3, 0xf1, 0x82, 0x87,
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- 0x1f, 0x74, 0xb5, 0x69, 0xfd, 0x33, 0xd6, 0x21,
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- 0x7c, 0x61, 0x60, 0x28, 0xca, 0x70, 0xdb, 0xa0,
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- 0xbb, 0xc8, 0x73, 0xa9, 0x82, 0xf8, 0x6b, 0xd8,
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- 0xf0, 0xc9, 0x7b, 0x20, 0xdf, 0x9d, 0xfb, 0x8c,
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- 0xd4, 0xa2, 0x89, 0xe1, 0x9b, 0x04, 0xad, 0xaa,
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- 0x11, 0x6c, 0x8f, 0xce, 0x83, 0x29, 0x56, 0x69,
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- 0xbb, 0x00, 0x3b, 0xef, 0xca, 0x2d, 0xcd, 0x52,
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- 0xc8, 0xf1, 0xb3, 0x9b, 0xb4, 0x4f, 0x6d, 0x9c,
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- 0x3d, 0x69, 0xcc, 0x6d, 0x1f, 0x38, 0x4d, 0xe6,
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- 0xbb, 0x0c, 0x87, 0xdc, 0x5f, 0xa9, 0x24, 0x93,
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- 0x03, 0x46, 0xa2, 0x33, 0x6c, 0xf4, 0xd8, 0x5d,
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- 0x68, 0xf3, 0xd3, 0xe0, 0xf2, 0x30, 0xdb, 0xf5,
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- 0x4f, 0x0f, 0xad, 0xc7, 0xd0, 0xaa, 0x47, 0xd9,
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- 0x9f, 0x85, 0x1b, 0x2e, 0x6c, 0x3c, 0x57, 0x04,
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- 0x29, 0xf4, 0xf5, 0x66, 0x7d, 0x93, 0x4a, 0xaa,
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- 0x05, 0x52, 0x55, 0xc1, 0xc6, 0x06, 0x90, 0xab,
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+ 0x6c, 0x21, 0xc1, 0x9e, 0x94, 0xee, 0xdf, 0x74,
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+ 0x3a, 0x3c, 0x7c, 0x04, 0x1a, 0x53, 0x9e, 0x7c,
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+ 0x42, 0xac, 0x7e, 0x28, 0x9a, 0xb7, 0xe2, 0x4e,
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+ 0x87, 0xd4, 0x00, 0x69, 0x71, 0xf0, 0x3e, 0x0b,
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+ 0xc1, 0xda, 0xd6, 0xbd, 0x21, 0x39, 0x4f, 0x25,
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+ 0x22, 0x1f, 0x76, 0x0d, 0x62, 0x1f, 0xa2, 0x89,
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+ 0xdb, 0x38, 0x32, 0x88, 0x21, 0x1d, 0x89, 0xf1,
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+ 0xe0, 0x14, 0xd4, 0xb7, 0x90, 0xfc, 0xbc, 0x50,
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+ 0xb0, 0x8d, 0x5c, 0x2f, 0x49, 0x9e, 0x90, 0x17,
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+ 0x9e, 0x60, 0x9f, 0xe1, 0x77, 0x4f, 0x11, 0xa2,
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+ 0xcf, 0x16, 0x65, 0x2d, 0x4a, 0x2c, 0x12, 0xcb,
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+ 0x1e, 0x3c, 0x29, 0x8b, 0xdc, 0x27, 0x06, 0x9d,
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+ 0xf4, 0x0d, 0xe1, 0xc9, 0xeb, 0x14, 0x6a, 0x7e,
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+ 0xfd, 0xa7, 0xa8, 0xa7, 0x51, 0x82, 0x62, 0x0f,
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+ 0x29, 0x8d, 0x8c, 0x5e, 0xf2, 0xb8, 0xcd, 0xd3,
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+ 0x51, 0x92, 0xa7, 0x25, 0x39, 0x9d, 0xdd, 0x06,
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+ 0xff, 0xb1, 0xb0, 0xd5, 0x61, 0x03, 0x8f, 0x25,
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+ 0x5c, 0x49, 0x12, 0xc1, 0x50, 0x67, 0x61, 0x78,
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+ 0xb3, 0xe3, 0xc4, 0xf6, 0x36, 0x16, 0xa9, 0x04,
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+ 0x91, 0x0a, 0x4b, 0x27, 0x28, 0x97, 0x50, 0x7c,
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+ 0x65, 0x2d, 0xd0, 0x08, 0x71, 0x84, 0xe7, 0x47,
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+ 0x79, 0x83, 0x91, 0x46, 0xd9, 0x8f, 0x79, 0xce,
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+ 0x49, 0xcb, 0xcd, 0x8b, 0x34, 0xac, 0x61, 0xe0,
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+ 0xe6, 0x55, 0xbf, 0x10, 0xe4, 0xac, 0x9a, 0xd6,
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+ 0xed, 0xc1, 0xc2, 0xb6, 0xb6, 0xf7, 0x41, 0x99,
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+ 0xde, 0xfa, 0xde, 0x11, 0x16, 0xa2, 0x18, 0x30,
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+ 0x30, 0xdc, 0x95, 0x76, 0x2f, 0x46, 0x43, 0x20,
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+ 0xc4, 0xe7, 0x50, 0xb9, 0x1e, 0xcd, 0x69, 0xbb,
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+ 0x29, 0x94, 0x27, 0x9c, 0xc9, 0xab, 0xb4, 0x27,
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+ 0x8b, 0x4d, 0xe1, 0xcb, 0xc1, 0x04, 0x2c, 0x66,
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+ 0x41, 0x3a, 0x4d, 0xeb, 0x61, 0x4c, 0x77, 0x5a,
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+ 0xee, 0xb0, 0xca, 0x99, 0x0e, 0x7f, 0xbe, 0x06
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};
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#ifndef OPENSSL_NO_EC
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diff --git a/providers/fips/self_test_kats.c b/providers/fips/self_test_kats.c
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index 064794d9bf..b6d5e8e134 100644
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--- a/providers/fips/self_test_kats.c
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+++ b/providers/fips/self_test_kats.c
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@@ -647,14 +647,21 @@ static int self_test_ciphers(OSSL_SELF_TEST *st, OSSL_LIB_CTX *libctx)
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return ret;
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}
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+int REDHAT_FIPS_asym_cipher_st = 0;
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+
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static int self_test_asym_ciphers(OSSL_SELF_TEST *st, OSSL_LIB_CTX *libctx)
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{
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int i, ret = 1;
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+ REDHAT_FIPS_asym_cipher_st = 1;
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+
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for (i = 0; i < (int)OSSL_NELEM(st_kat_asym_cipher_tests); ++i) {
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if (!self_test_asym_cipher(&st_kat_asym_cipher_tests[i], st, libctx))
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ret = 0;
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}
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+
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+ REDHAT_FIPS_asym_cipher_st = 0;
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+
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return ret;
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}
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diff --git a/providers/implementations/asymciphers/rsa_enc.c b/providers/implementations/asymciphers/rsa_enc.c
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index 00cf65fcd6..83be3d8ede 100644
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--- a/providers/implementations/asymciphers/rsa_enc.c
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+++ b/providers/implementations/asymciphers/rsa_enc.c
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@@ -30,6 +30,9 @@
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#include "prov/implementations.h"
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#include "prov/providercommon.h"
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#include "prov/securitycheck.h"
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+#ifdef FIPS_MODULE
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+# include "crypto/rsa/rsa_local.h"
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+#endif
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#include <stdlib.h>
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@@ -75,6 +78,9 @@ typedef struct {
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/* TLS padding */
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unsigned int client_version;
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unsigned int alt_version;
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+#ifdef FIPS_MODULE
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+ char *redhat_st_oaep_seed;
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+#endif /* FIPS_MODULE */
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} PROV_RSA_CTX;
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static void *rsa_newctx(void *provctx)
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@@ -190,12 +196,21 @@ static int rsa_encrypt(void *vprsactx, unsigned char *out, size_t *outlen,
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return 0;
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}
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ret =
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- ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex(prsactx->libctx, tbuf,
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+#ifdef FIPS_MODULE
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+ ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex2(
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+#else
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+ ossl_rsa_padding_add_PKCS1_OAEP_mgf1_ex(
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+#endif
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+ prsactx->libctx, tbuf,
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rsasize, in, inlen,
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prsactx->oaep_label,
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prsactx->oaep_labellen,
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prsactx->oaep_md,
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- prsactx->mgf1_md);
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+ prsactx->mgf1_md
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+#ifdef FIPS_MODULE
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+ , prsactx->redhat_st_oaep_seed
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+#endif
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+ );
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if (!ret) {
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OPENSSL_free(tbuf);
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@@ -326,6 +341,9 @@ static void rsa_freectx(void *vprsactx)
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EVP_MD_free(prsactx->oaep_md);
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EVP_MD_free(prsactx->mgf1_md);
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OPENSSL_free(prsactx->oaep_label);
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+#ifdef FIPS_MODULE
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+ OPENSSL_free(prsactx->redhat_st_oaep_seed);
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+#endif /* FIPS_MODULE */
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OPENSSL_free(prsactx);
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}
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@@ -445,6 +463,9 @@ static const OSSL_PARAM known_gettable_ctx_params[] = {
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NULL, 0),
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OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION, NULL),
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OSSL_PARAM_uint(OSSL_ASYM_CIPHER_PARAM_TLS_NEGOTIATED_VERSION, NULL),
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+#ifdef FIPS_MODULE
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+ OSSL_PARAM_octet_string(OSSL_ASYM_CIPHER_PARAM_REDHAT_KAT_OEAP_SEED, NULL, 0),
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+#endif /* FIPS_MODULE */
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OSSL_PARAM_END
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};
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@@ -454,6 +475,10 @@ static const OSSL_PARAM *rsa_gettable_ctx_params(ossl_unused void *vprsactx,
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return known_gettable_ctx_params;
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}
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+#ifdef FIPS_MODULE
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+extern int REDHAT_FIPS_asym_cipher_st;
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+#endif /* FIPS_MODULE */
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+
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static int rsa_set_ctx_params(void *vprsactx, const OSSL_PARAM params[])
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{
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PROV_RSA_CTX *prsactx = (PROV_RSA_CTX *)vprsactx;
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@@ -563,6 +588,18 @@ static int rsa_set_ctx_params(void *vprsactx, const OSSL_PARAM params[])
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prsactx->oaep_labellen = tmp_labellen;
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}
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+#ifdef FIPS_MODULE
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+ p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_REDHAT_KAT_OEAP_SEED);
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+ if (p != NULL && REDHAT_FIPS_asym_cipher_st) {
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+ void *tmp_oaep_seed = NULL;
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+
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+ if (!OSSL_PARAM_get_octet_string(p, &tmp_oaep_seed, 0, NULL))
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+ return 0;
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+ OPENSSL_free(prsactx->redhat_st_oaep_seed);
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+ prsactx->redhat_st_oaep_seed = (char *)tmp_oaep_seed;
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+ }
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+#endif /* FIPS_MODULE */
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+
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p = OSSL_PARAM_locate_const(params, OSSL_ASYM_CIPHER_PARAM_TLS_CLIENT_VERSION);
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if (p != NULL) {
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unsigned int client_version;
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--
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2.37.1
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