Add dupctx support to rc4_hmac_md5 algo

Pretty straightforward, just clone the requested context, no pointers to
fixup

Fixes #21887

Reviewed-by: Paul Dale <pauli@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.org>
Reviewed-by: Matt Caswell <matt@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/23102)

(cherry picked from commit f9163efe96e218adeae2a0dc6a4cbef568f395ee)

2 files changed, 29 insertions, 0 deletions

diff --git a/providers/implementations/ciphers/cipher_aes_cbc_hmac_sha.c b/providers/implementations/ciphers/cipher_aes_cbc_hmac_sha.c
index f9a8a58041..e9a9a2a54c 100644
--- a/providers/implementations/ciphers/cipher_aes_cbc_hmac_sha.c
+++ b/providers/implementations/ciphers/cipher_aes_cbc_hmac_sha.c
@@ -334,6 +334,16 @@ static void *aes_cbc_hmac_sha1_newctx(void *provctx, size_t kbits,
     return ctx;
 }
 
+static void *aes_cbc_hmac_sha1_dupctx(void *provctx)
+{
+    PROV_AES_HMAC_SHA1_CTX *ctx = provctx;
+
+    if (ctx == NULL)
+        return NULL;
+
+    return OPENSSL_memdup(ctx, sizeof(*ctx));
+}
+
 static void aes_cbc_hmac_sha1_freectx(void *vctx)
 {
     PROV_AES_HMAC_SHA1_CTX *ctx = (PROV_AES_HMAC_SHA1_CTX *)vctx;
@@ -361,6 +371,13 @@ static void *aes_cbc_hmac_sha256_newctx(void *provctx, size_t kbits,
     return ctx;
 }
 
+static void *aes_cbc_hmac_sha256_dupctx(void *provctx)
+{
+    PROV_AES_HMAC_SHA256_CTX *ctx = provctx;
+
+    return OPENSSL_memdup(ctx, sizeof(*ctx));
+}
+
 static void aes_cbc_hmac_sha256_freectx(void *vctx)
 {
     PROV_AES_HMAC_SHA256_CTX *ctx = (PROV_AES_HMAC_SHA256_CTX *)vctx;
@@ -386,6 +403,7 @@ static int nm##_##kbits##_##sub##_get_params(OSSL_PARAM params[])              \
 const OSSL_DISPATCH ossl_##nm##kbits##sub##_functions[] = {                    \
     { OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))nm##_##kbits##_##sub##_newctx },\
     { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))nm##_##sub##_freectx },        \
+    { OSSL_FUNC_CIPHER_DUPCTX,  (void (*)(void))nm##_##sub##_dupctx},          \
     { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))nm##_einit },             \
     { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))nm##_dinit },             \
     { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))nm##_update },                  \
diff --git a/providers/implementations/ciphers/cipher_rc4_hmac_md5.c b/providers/implementations/ciphers/cipher_rc4_hmac_md5.c
index c46c6eab63..9e99f462ec 100644
--- a/providers/implementations/ciphers/cipher_rc4_hmac_md5.c
+++ b/providers/implementations/ciphers/cipher_rc4_hmac_md5.c
@@ -34,6 +34,7 @@ static OSSL_FUNC_cipher_encrypt_init_fn rc4_hmac_md5_einit;
 static OSSL_FUNC_cipher_decrypt_init_fn rc4_hmac_md5_dinit;
 static OSSL_FUNC_cipher_newctx_fn rc4_hmac_md5_newctx;
 static OSSL_FUNC_cipher_freectx_fn rc4_hmac_md5_freectx;
+static OSSL_FUNC_cipher_dupctx_fn rc4_hmac_md5_dupctx;
 static OSSL_FUNC_cipher_get_ctx_params_fn rc4_hmac_md5_get_ctx_params;
 static OSSL_FUNC_cipher_gettable_ctx_params_fn rc4_hmac_md5_gettable_ctx_params;
 static OSSL_FUNC_cipher_set_ctx_params_fn rc4_hmac_md5_set_ctx_params;
@@ -71,6 +72,15 @@ static void rc4_hmac_md5_freectx(void *vctx)
     OPENSSL_clear_free(ctx,  sizeof(*ctx));
 }
 
+static void *rc4_hmac_md5_dupctx(void *vctx)
+{
+    PROV_RC4_HMAC_MD5_CTX *ctx = vctx;
+
+    if (ctx == NULL)
+        return NULL;
+    return OPENSSL_memdup(ctx, sizeof(*ctx));
+}
+
 static int rc4_hmac_md5_einit(void *ctx, const unsigned char *key,
                               size_t keylen, const unsigned char *iv,
                               size_t ivlen, const OSSL_PARAM params[])
@@ -214,6 +224,7 @@ static int rc4_hmac_md5_get_params(OSSL_PARAM params[])
 const OSSL_DISPATCH ossl_rc4_hmac_ossl_md5_functions[] = {
     { OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))rc4_hmac_md5_newctx },
     { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))rc4_hmac_md5_freectx },
+    { OSSL_FUNC_CIPHER_DUPCTX, (void (*)(void))rc4_hmac_md5_dupctx },
     { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))rc4_hmac_md5_einit },
     { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))rc4_hmac_md5_dinit },
     { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))rc4_hmac_md5_update },