diff --git a/crypto/Kconfig b/crypto/Kconfig index f413cfc9a3e2..5a198275e4fc 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -360,6 +360,7 @@ config CRYPTO_AES select CRYPTO_LIB_AES select CRYPTO_LIB_AES_CBC if CRYPTO_CBC != n || CRYPTO_CTS != n select CRYPTO_LIB_AES_CBC_MACS if CRYPTO_CMAC != n || CRYPTO_XCBC != n || CRYPTO_CCM != n + select CRYPTO_LIB_AES_CTR if CRYPTO_CTR != n || CRYPTO_XCTR != n select CRYPTO_LIB_AES_ECB if CRYPTO_ECB != n select CRYPTO_HASH if CRYPTO_CMAC != n || CRYPTO_XCBC != n || CRYPTO_CCM != n # CRYPTO_SKCIPHER should be selected only if a mode that needs it is diff --git a/crypto/aes.c b/crypto/aes.c index 2455abc29252..6b298e788630 100644 --- a/crypto/aes.c +++ b/crypto/aes.c @@ -7,6 +7,7 @@ #include #include +#include #include #include #include @@ -456,6 +457,31 @@ crypto_aes_cbc_cts_decrypt(struct skcipher_request *req) return crypto_aes_cbc_cts_crypt_nonlinear(req, /* enc= */ false); } +/* AES-CTR */ + +static __maybe_unused int crypto_aes_ctr_crypt(struct skcipher_request *req) +{ + const struct aes_enckey *key = + crypto_skcipher_ctx(crypto_skcipher_reqtfm(req)); + + AES_CRYPT_SG(aes_ctr, req->dst, req->src, req->cryptlen, 0, req->iv, + key); + return 0; +} + +/* AES-XCTR */ + +static __maybe_unused int crypto_aes_xctr_crypt(struct skcipher_request *req) +{ + const struct aes_enckey *key = + crypto_skcipher_ctx(crypto_skcipher_reqtfm(req)); + u64 ctr = 1; + + AES_CRYPT_SG(aes_xctr, req->dst, req->src, req->cryptlen, 0, &ctr, + req->iv, key); + return 0; +} + static struct skcipher_alg skcipher_algs[] = { #if IS_ENABLED(CONFIG_CRYPTO_ECB) { @@ -504,6 +530,40 @@ static struct skcipher_alg skcipher_algs[] = { .decrypt = crypto_aes_cbc_cts_decrypt, }, #endif +#if IS_ENABLED(CONFIG_CRYPTO_CTR) + { + .base.cra_name = "ctr(aes)", + .base.cra_driver_name = "ctr-aes-lib", + .base.cra_priority = 110, + .base.cra_blocksize = 1, + .base.cra_ctxsize = sizeof(struct aes_enckey), + .base.cra_module = THIS_MODULE, + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, + .chunksize = AES_BLOCK_SIZE, + .setkey = crypto_aes_skcipher_setenckey, + .encrypt = crypto_aes_ctr_crypt, + .decrypt = crypto_aes_ctr_crypt, + }, +#endif +#if IS_ENABLED(CONFIG_CRYPTO_XCTR) + { + .base.cra_name = "xctr(aes)", + .base.cra_driver_name = "xctr-aes-lib", + .base.cra_priority = 110, + .base.cra_blocksize = 1, + .base.cra_ctxsize = sizeof(struct aes_enckey), + .base.cra_module = THIS_MODULE, + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, + .chunksize = AES_BLOCK_SIZE, + .setkey = crypto_aes_skcipher_setenckey, + .encrypt = crypto_aes_xctr_crypt, + .decrypt = crypto_aes_xctr_crypt, + }, +#endif }; static int __init crypto_aes_mod_init(void) @@ -576,3 +636,11 @@ MODULE_ALIAS_CRYPTO("cbc-aes-lib"); MODULE_ALIAS_CRYPTO("cts(cbc(aes))"); MODULE_ALIAS_CRYPTO("cts-cbc-aes-lib"); #endif +#if IS_ENABLED(CONFIG_CRYPTO_CTR) +MODULE_ALIAS_CRYPTO("ctr(aes)"); +MODULE_ALIAS_CRYPTO("ctr-aes-lib"); +#endif +#if IS_ENABLED(CONFIG_CRYPTO_XCTR) +MODULE_ALIAS_CRYPTO("xctr(aes)"); +MODULE_ALIAS_CRYPTO("xctr-aes-lib"); +#endif