^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Cryptographic API.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (c) 2013 Chanho Min <chanho.min@lge.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/crypto.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/lz4.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <crypto/internal/scompress.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) struct lz4hc_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) void *lz4hc_comp_mem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) static void *lz4hc_alloc_ctx(struct crypto_scomp *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) void *ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) ctx = vmalloc(LZ4HC_MEM_COMPRESS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) if (!ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) return ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) static int lz4hc_init(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) ctx->lz4hc_comp_mem = lz4hc_alloc_ctx(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) if (IS_ERR(ctx->lz4hc_comp_mem))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static void lz4hc_free_ctx(struct crypto_scomp *tfm, void *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) vfree(ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static void lz4hc_exit(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) lz4hc_free_ctx(NULL, ctx->lz4hc_comp_mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static int __lz4hc_compress_crypto(const u8 *src, unsigned int slen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) u8 *dst, unsigned int *dlen, void *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) int out_len = LZ4_compress_HC(src, dst, slen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) *dlen, LZ4HC_DEFAULT_CLEVEL, ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (!out_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) *dlen = out_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static int lz4hc_scompress(struct crypto_scomp *tfm, const u8 *src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) unsigned int slen, u8 *dst, unsigned int *dlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) void *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return __lz4hc_compress_crypto(src, slen, dst, dlen, ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static int lz4hc_compress_crypto(struct crypto_tfm *tfm, const u8 *src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) unsigned int slen, u8 *dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) unsigned int *dlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) struct lz4hc_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return __lz4hc_compress_crypto(src, slen, dst, dlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ctx->lz4hc_comp_mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) static int __lz4hc_decompress_crypto(const u8 *src, unsigned int slen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) u8 *dst, unsigned int *dlen, void *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) int out_len = LZ4_decompress_safe(src, dst, slen, *dlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (out_len < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) *dlen = out_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static int lz4hc_sdecompress(struct crypto_scomp *tfm, const u8 *src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) unsigned int slen, u8 *dst, unsigned int *dlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) void *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return __lz4hc_decompress_crypto(src, slen, dst, dlen, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) static int lz4hc_decompress_crypto(struct crypto_tfm *tfm, const u8 *src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) unsigned int slen, u8 *dst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) unsigned int *dlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return __lz4hc_decompress_crypto(src, slen, dst, dlen, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static struct crypto_alg alg_lz4hc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) .cra_name = "lz4hc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) .cra_driver_name = "lz4hc-generic",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .cra_ctxsize = sizeof(struct lz4hc_ctx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .cra_module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) .cra_init = lz4hc_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) .cra_exit = lz4hc_exit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) .cra_u = { .compress = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) .coa_compress = lz4hc_compress_crypto,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) .coa_decompress = lz4hc_decompress_crypto } }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) static struct scomp_alg scomp = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) .alloc_ctx = lz4hc_alloc_ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) .free_ctx = lz4hc_free_ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .compress = lz4hc_scompress,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .decompress = lz4hc_sdecompress,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .base = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) .cra_name = "lz4hc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) .cra_driver_name = "lz4hc-scomp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) .cra_module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) static int __init lz4hc_mod_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) ret = crypto_register_alg(&alg_lz4hc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) ret = crypto_register_scomp(&scomp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) crypto_unregister_alg(&alg_lz4hc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) static void __exit lz4hc_mod_fini(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) crypto_unregister_alg(&alg_lz4hc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) crypto_unregister_scomp(&scomp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) subsys_initcall(lz4hc_mod_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) module_exit(lz4hc_mod_fini);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) MODULE_DESCRIPTION("LZ4HC Compression Algorithm");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) MODULE_ALIAS_CRYPTO("lz4hc");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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