^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/crypto.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/lzo.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 lzorle_ctx {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) void *lzorle_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 *lzorle_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 = kvmalloc(LZO1X_MEM_COMPRESS, GFP_KERNEL);
^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 lzorle_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 lzorle_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->lzorle_comp_mem = lzorle_alloc_ctx(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) if (IS_ERR(ctx->lzorle_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 lzorle_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) kvfree(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 lzorle_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 lzorle_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) lzorle_free_ctx(NULL, ctx->lzorle_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 __lzorle_compress(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) size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) err = lzorle1x_1_compress(src, slen, dst, &tmp_len, ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if (err != LZO_E_OK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) *dlen = tmp_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) static int lzorle_compress(struct crypto_tfm *tfm, const u8 *src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) unsigned int slen, u8 *dst, unsigned int *dlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) struct lzorle_ctx *ctx = crypto_tfm_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return __lzorle_compress(src, slen, dst, dlen, ctx->lzorle_comp_mem);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static int lzorle_scompress(struct crypto_scomp *tfm, const u8 *src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) unsigned int slen, u8 *dst, unsigned int *dlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) void *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) return __lzorle_compress(src, slen, dst, dlen, ctx);
^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 __lzorle_decompress(const u8 *src, unsigned int slen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) u8 *dst, unsigned int *dlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) err = lzo1x_decompress_safe(src, slen, dst, &tmp_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) if (err != LZO_E_OK)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) *dlen = tmp_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) static int lzorle_decompress(struct crypto_tfm *tfm, const u8 *src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) unsigned int slen, u8 *dst, unsigned int *dlen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) return __lzorle_decompress(src, slen, dst, dlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static int lzorle_sdecompress(struct crypto_scomp *tfm, const u8 *src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) unsigned int slen, u8 *dst, unsigned int *dlen,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) void *ctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return __lzorle_decompress(src, slen, dst, dlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static struct crypto_alg alg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) .cra_name = "lzo-rle",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .cra_driver_name = "lzo-rle-generic",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .cra_flags = CRYPTO_ALG_TYPE_COMPRESS,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) .cra_ctxsize = sizeof(struct lzorle_ctx),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) .cra_module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) .cra_init = lzorle_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) .cra_exit = lzorle_exit,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) .cra_u = { .compress = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) .coa_compress = lzorle_compress,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) .coa_decompress = lzorle_decompress } }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) static struct scomp_alg scomp = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .alloc_ctx = lzorle_alloc_ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .free_ctx = lzorle_free_ctx,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .compress = lzorle_scompress,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) .decompress = lzorle_sdecompress,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) .base = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) .cra_name = "lzo-rle",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) .cra_driver_name = "lzo-rle-scomp",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .cra_module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static int __init lzorle_mod_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) ret = crypto_register_alg(&alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) ret = crypto_register_scomp(&scomp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) crypto_unregister_alg(&alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static void __exit lzorle_mod_fini(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) crypto_unregister_alg(&alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) crypto_unregister_scomp(&scomp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) subsys_initcall(lzorle_mod_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) module_exit(lzorle_mod_fini);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) MODULE_DESCRIPTION("LZO-RLE Compression Algorithm");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) MODULE_ALIAS_CRYPTO("lzo-rle");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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