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crypto: caam/qi2 - add support for ChaCha20
Add support for ChaCha20 skcipher algorithm. Signed-off-by: Carmen Iorga <carmen.iorga@nxp.com> Signed-off-by: Horia Geantă <horia.geanta@nxp.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
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4 changed files with 36 additions and 4 deletions
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@ -1228,7 +1228,8 @@ static inline void skcipher_append_src_dst(u32 *desc)
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* @desc: pointer to buffer used for descriptor construction
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* @cdata: pointer to block cipher transform definitions
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* Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
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* with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
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* with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128
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* - OP_ALG_ALGSEL_CHACHA20
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* @ivsize: initialization vector size
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* @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
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* @ctx1_iv_off: IV offset in CONTEXT1 register
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@ -1293,7 +1294,8 @@ EXPORT_SYMBOL(cnstr_shdsc_skcipher_encap);
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* @desc: pointer to buffer used for descriptor construction
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* @cdata: pointer to block cipher transform definitions
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* Valid algorithm values - one of OP_ALG_ALGSEL_{AES, DES, 3DES} ANDed
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* with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128.
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* with OP_ALG_AAI_CBC or OP_ALG_AAI_CTR_MOD128
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* - OP_ALG_ALGSEL_CHACHA20
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* @ivsize: initialization vector size
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* @is_rfc3686: true when ctr(aes) is wrapped by rfc3686 template
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* @ctx1_iv_off: IV offset in CONTEXT1 register
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@ -816,7 +816,9 @@ static int skcipher_setkey(struct crypto_skcipher *skcipher, const u8 *key,
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u32 *desc;
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u32 ctx1_iv_off = 0;
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const bool ctr_mode = ((ctx->cdata.algtype & OP_ALG_AAI_MASK) ==
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OP_ALG_AAI_CTR_MOD128);
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OP_ALG_AAI_CTR_MOD128) &&
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((ctx->cdata.algtype & OP_ALG_ALGSEL_MASK) !=
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OP_ALG_ALGSEL_CHACHA20);
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const bool is_rfc3686 = alg->caam.rfc3686;
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print_hex_dump_debug("key in @" __stringify(__LINE__)": ",
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@ -1494,7 +1496,23 @@ static struct caam_skcipher_alg driver_algs[] = {
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.ivsize = AES_BLOCK_SIZE,
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},
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.caam.class1_alg_type = OP_ALG_ALGSEL_AES | OP_ALG_AAI_XTS,
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}
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},
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{
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.skcipher = {
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.base = {
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.cra_name = "chacha20",
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.cra_driver_name = "chacha20-caam-qi2",
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.cra_blocksize = 1,
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},
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.setkey = skcipher_setkey,
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.encrypt = skcipher_encrypt,
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.decrypt = skcipher_decrypt,
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.min_keysize = CHACHA20_KEY_SIZE,
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.max_keysize = CHACHA20_KEY_SIZE,
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.ivsize = CHACHA20_IV_SIZE,
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},
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.caam.class1_alg_type = OP_ALG_ALGSEL_CHACHA20,
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},
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};
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static struct caam_aead_alg driver_aeads[] = {
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@ -4908,6 +4926,11 @@ static int dpaa2_caam_probe(struct fsl_mc_device *dpseci_dev)
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alg_sel == OP_ALG_ALGSEL_AES)
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continue;
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/* Skip CHACHA20 algorithms if not supported by device */
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if (alg_sel == OP_ALG_ALGSEL_CHACHA20 &&
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!priv->sec_attr.ccha_acc_num)
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continue;
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t_alg->caam.dev = dev;
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caam_skcipher_alg_init(t_alg);
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@ -36,6 +36,7 @@
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#include <crypto/gcm.h>
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#include <crypto/sha.h>
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#include <crypto/md5.h>
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#include <crypto/chacha20.h>
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#include <crypto/internal/aead.h>
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#include <crypto/authenc.h>
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#include <crypto/akcipher.h>
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@ -1159,6 +1159,7 @@
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#define OP_ALG_ALGSEL_KASUMI (0x70 << OP_ALG_ALGSEL_SHIFT)
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#define OP_ALG_ALGSEL_CRC (0x90 << OP_ALG_ALGSEL_SHIFT)
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#define OP_ALG_ALGSEL_SNOW_F9 (0xA0 << OP_ALG_ALGSEL_SHIFT)
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#define OP_ALG_ALGSEL_CHACHA20 (0xD0 << OP_ALG_ALGSEL_SHIFT)
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#define OP_ALG_AAI_SHIFT 4
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#define OP_ALG_AAI_MASK (0x1ff << OP_ALG_AAI_SHIFT)
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@ -1206,6 +1207,11 @@
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#define OP_ALG_AAI_RNG4_AI (0x80 << OP_ALG_AAI_SHIFT)
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#define OP_ALG_AAI_RNG4_SK (0x100 << OP_ALG_AAI_SHIFT)
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/* Chacha20 AAI set */
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#define OP_ALG_AAI_AEAD (0x002 << OP_ALG_AAI_SHIFT)
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#define OP_ALG_AAI_KEYSTREAM (0x001 << OP_ALG_AAI_SHIFT)
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#define OP_ALG_AAI_BC8 (0x008 << OP_ALG_AAI_SHIFT)
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/* hmac/smac AAI set */
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#define OP_ALG_AAI_HASH (0x00 << OP_ALG_AAI_SHIFT)
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#define OP_ALG_AAI_HMAC (0x01 << OP_ALG_AAI_SHIFT)
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