diff options
author | Daiki Ueno <dueno@redhat.com> | 2023-10-16 14:42:12 +0900 |
---|---|---|
committer | Tomas Mraz <tomas@openssl.org> | 2023-10-18 16:26:17 +0200 |
commit | 86f3fae5f8fb4d9cb96ea9b34250cd3abc3038ef (patch) | |
tree | 1ecf1aef3617479c4e34eff967546e7c33901efb | |
parent | a9c69e0e70d7fcf1bd7b55754894d5ebf7ae5aad (diff) | |
download | openssl-86f3fae5f8fb4d9cb96ea9b34250cd3abc3038ef.tar.gz |
rsa: Accept NULL OAEP label for backward compatibility
According to the manual page, EVP_PKEY_CTX_set0_rsa_oaep_label()
should accept NULL as the label argument, though the function
currently rejects it while setting the corresponding octet string
parameter with OSSL_PARAM_construct_octet_string, which expects
non-NULL input. This adds a workaround to the caller for backward
compatibility.
Signed-off-by: Daiki Ueno <dueno@redhat.com>
Reviewed-by: Dmitry Belyavskiy <beldmit@gmail.com>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/22397)
(cherry picked from commit 21b98da9d80c561b6273b0c51c259196d6740e70)
-rw-r--r-- | crypto/rsa/rsa_lib.c | 12 | ||||
-rw-r--r-- | test/evp_extra_test.c | 31 |
2 files changed, 42 insertions, 1 deletions
diff --git a/crypto/rsa/rsa_lib.c b/crypto/rsa/rsa_lib.c index 449097b8b2..709ecb5daa 100644 --- a/crypto/rsa/rsa_lib.c +++ b/crypto/rsa/rsa_lib.c @@ -1084,6 +1084,12 @@ int EVP_PKEY_CTX_get_rsa_mgf1_md(EVP_PKEY_CTX *ctx, const EVP_MD **md) int EVP_PKEY_CTX_set0_rsa_oaep_label(EVP_PKEY_CTX *ctx, void *label, int llen) { OSSL_PARAM rsa_params[2], *p = rsa_params; + const char *empty = ""; + /* + * Needed as we swap label with empty if it is NULL, and label is + * freed at the end of this function. + */ + void *plabel = label; int ret; if (ctx == NULL || !EVP_PKEY_CTX_IS_ASYM_CIPHER_OP(ctx)) { @@ -1096,9 +1102,13 @@ int EVP_PKEY_CTX_set0_rsa_oaep_label(EVP_PKEY_CTX *ctx, void *label, int llen) if (!EVP_PKEY_CTX_is_a(ctx, "RSA")) return -1; + /* Accept NULL for backward compatibility */ + if (label == NULL && llen == 0) + plabel = (void *)empty; + /* Cast away the const. This is read only so should be safe */ *p++ = OSSL_PARAM_construct_octet_string(OSSL_ASYM_CIPHER_PARAM_OAEP_LABEL, - (void *)label, (size_t)llen); + (void *)plabel, (size_t)llen); *p++ = OSSL_PARAM_construct_end(); ret = evp_pkey_ctx_set_params_strict(ctx, rsa_params); diff --git a/test/evp_extra_test.c b/test/evp_extra_test.c index 2899c69b19..cfffa21350 100644 --- a/test/evp_extra_test.c +++ b/test/evp_extra_test.c @@ -2912,6 +2912,36 @@ static int test_RSA_OAEP_set_get_params(void) return ret; } +/* https://github.com/openssl/openssl/issues/21288 */ +static int test_RSA_OAEP_set_null_label(void) +{ + int ret = 0; + EVP_PKEY *key = NULL; + EVP_PKEY_CTX *key_ctx = NULL; + + if (!TEST_ptr(key = load_example_rsa_key()) + || !TEST_ptr(key_ctx = EVP_PKEY_CTX_new_from_pkey(testctx, key, NULL)) + || !TEST_true(EVP_PKEY_encrypt_init(key_ctx))) + goto err; + + if (!TEST_true(EVP_PKEY_CTX_set_rsa_padding(key_ctx, RSA_PKCS1_OAEP_PADDING))) + goto err; + + if (!TEST_true(EVP_PKEY_CTX_set0_rsa_oaep_label(key_ctx, OPENSSL_strdup("foo"), 0))) + goto err; + + if (!TEST_true(EVP_PKEY_CTX_set0_rsa_oaep_label(key_ctx, NULL, 0))) + goto err; + + ret = 1; + + err: + EVP_PKEY_free(key); + EVP_PKEY_CTX_free(key_ctx); + + return ret; +} + #if !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305) static int test_decrypt_null_chunks(void) { @@ -4899,6 +4929,7 @@ int setup_tests(void) #endif ADD_TEST(test_RSA_get_set_params); ADD_TEST(test_RSA_OAEP_set_get_params); + ADD_TEST(test_RSA_OAEP_set_null_label); #if !defined(OPENSSL_NO_CHACHA) && !defined(OPENSSL_NO_POLY1305) ADD_TEST(test_decrypt_null_chunks); #endif |