^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Symmetric key cipher operations.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Generic encrypt/decrypt wrapper for ciphers, handles operations across
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * multiple page boundaries by using temporary blocks. In user context,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * the kernel is given a chance to schedule us once per page.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (c) 2015 Herbert Xu <herbert@gondor.apana.org.au>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <crypto/internal/aead.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <crypto/internal/cipher.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <crypto/internal/skcipher.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <crypto/scatterwalk.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/bug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/cryptouser.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/rtnetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <net/netlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) enum {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) SKCIPHER_WALK_PHYS = 1 << 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) SKCIPHER_WALK_SLOW = 1 << 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) SKCIPHER_WALK_COPY = 1 << 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) SKCIPHER_WALK_DIFF = 1 << 3,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) SKCIPHER_WALK_SLEEP = 1 << 4,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) struct skcipher_walk_buffer {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct list_head entry;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) struct scatter_walk dst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) unsigned int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) u8 *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) u8 buffer[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static int skcipher_walk_next(struct skcipher_walk *walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static inline void skcipher_unmap(struct scatter_walk *walk, void *vaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) if (PageHighMem(scatterwalk_page(walk)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) kunmap_atomic(vaddr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static inline void *skcipher_map(struct scatter_walk *walk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct page *page = scatterwalk_page(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return (PageHighMem(page) ? kmap_atomic(page) : page_address(page)) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) offset_in_page(walk->offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) static inline void skcipher_map_src(struct skcipher_walk *walk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) walk->src.virt.addr = skcipher_map(&walk->in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static inline void skcipher_map_dst(struct skcipher_walk *walk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) walk->dst.virt.addr = skcipher_map(&walk->out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) static inline void skcipher_unmap_src(struct skcipher_walk *walk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) skcipher_unmap(&walk->in, walk->src.virt.addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) static inline void skcipher_unmap_dst(struct skcipher_walk *walk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) skcipher_unmap(&walk->out, walk->dst.virt.addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static inline gfp_t skcipher_walk_gfp(struct skcipher_walk *walk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return walk->flags & SKCIPHER_WALK_SLEEP ? GFP_KERNEL : GFP_ATOMIC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) /* Get a spot of the specified length that does not straddle a page.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * The caller needs to ensure that there is enough space for this operation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static inline u8 *skcipher_get_spot(u8 *start, unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) u8 *end_page = (u8 *)(((unsigned long)(start + len - 1)) & PAGE_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) return max(start, end_page);
^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 skcipher_done_slow(struct skcipher_walk *walk, unsigned int bsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) u8 *addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) addr = (u8 *)ALIGN((unsigned long)walk->buffer, walk->alignmask + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) addr = skcipher_get_spot(addr, bsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) scatterwalk_copychunks(addr, &walk->out, bsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) (walk->flags & SKCIPHER_WALK_PHYS) ? 2 : 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) int skcipher_walk_done(struct skcipher_walk *walk, int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) unsigned int n = walk->nbytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) unsigned int nbytes = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (!n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) goto finish;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (likely(err >= 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) n -= err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) nbytes = walk->total - n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) if (likely(!(walk->flags & (SKCIPHER_WALK_PHYS |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) SKCIPHER_WALK_SLOW |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) SKCIPHER_WALK_COPY |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) SKCIPHER_WALK_DIFF)))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) unmap_src:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) skcipher_unmap_src(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) } else if (walk->flags & SKCIPHER_WALK_DIFF) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) skcipher_unmap_dst(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) goto unmap_src;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) } else if (walk->flags & SKCIPHER_WALK_COPY) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) skcipher_map_dst(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) memcpy(walk->dst.virt.addr, walk->page, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) skcipher_unmap_dst(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) } else if (unlikely(walk->flags & SKCIPHER_WALK_SLOW)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (err > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) * Didn't process all bytes. Either the algorithm is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) * broken, or this was the last step and it turned out
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) * the message wasn't evenly divisible into blocks but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) * the algorithm requires it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) err = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) nbytes = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) n = skcipher_done_slow(walk, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (err > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) walk->total = nbytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) walk->nbytes = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) scatterwalk_advance(&walk->in, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) scatterwalk_advance(&walk->out, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) scatterwalk_done(&walk->in, 0, nbytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) scatterwalk_done(&walk->out, 1, nbytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (nbytes) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) crypto_yield(walk->flags & SKCIPHER_WALK_SLEEP ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) CRYPTO_TFM_REQ_MAY_SLEEP : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return skcipher_walk_next(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) finish:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) /* Short-circuit for the common/fast path. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (!((unsigned long)walk->buffer | (unsigned long)walk->page))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (walk->flags & SKCIPHER_WALK_PHYS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) if (walk->iv != walk->oiv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) memcpy(walk->oiv, walk->iv, walk->ivsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (walk->buffer != walk->page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) kfree(walk->buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (walk->page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) free_page((unsigned long)walk->page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) EXPORT_SYMBOL_GPL(skcipher_walk_done);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) void skcipher_walk_complete(struct skcipher_walk *walk, int err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) struct skcipher_walk_buffer *p, *tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) list_for_each_entry_safe(p, tmp, &walk->buffers, entry) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) u8 *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) goto done;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) data = p->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (!data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) data = PTR_ALIGN(&p->buffer[0], walk->alignmask + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) data = skcipher_get_spot(data, walk->stride);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) scatterwalk_copychunks(data, &p->dst, p->len, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) if (offset_in_page(p->data) + p->len + walk->stride >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) free_page((unsigned long)p->data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) done:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) list_del(&p->entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) kfree(p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) if (!err && walk->iv != walk->oiv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) memcpy(walk->oiv, walk->iv, walk->ivsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (walk->buffer != walk->page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) kfree(walk->buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) if (walk->page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) free_page((unsigned long)walk->page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) EXPORT_SYMBOL_GPL(skcipher_walk_complete);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) static void skcipher_queue_write(struct skcipher_walk *walk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) struct skcipher_walk_buffer *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) p->dst = walk->out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) list_add_tail(&p->entry, &walk->buffers);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) static int skcipher_next_slow(struct skcipher_walk *walk, unsigned int bsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) bool phys = walk->flags & SKCIPHER_WALK_PHYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) unsigned alignmask = walk->alignmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) struct skcipher_walk_buffer *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) unsigned a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) unsigned n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) u8 *buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) void *v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if (!phys) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) if (!walk->buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) walk->buffer = walk->page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) buffer = walk->buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) goto ok;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) /* Start with the minimum alignment of kmalloc. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) a = crypto_tfm_ctx_alignment() - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) n = bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) if (phys) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) /* Calculate the minimum alignment of p->buffer. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) a &= (sizeof(*p) ^ (sizeof(*p) - 1)) >> 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) n += sizeof(*p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) /* Minimum size to align p->buffer by alignmask. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) n += alignmask & ~a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) /* Minimum size to ensure p->buffer does not straddle a page. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) n += (bsize - 1) & ~(alignmask | a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) v = kzalloc(n, skcipher_walk_gfp(walk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) if (!v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) return skcipher_walk_done(walk, -ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) if (phys) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) p = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) p->len = bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) skcipher_queue_write(walk, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) buffer = p->buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) walk->buffer = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) buffer = v;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) ok:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) walk->dst.virt.addr = PTR_ALIGN(buffer, alignmask + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) walk->dst.virt.addr = skcipher_get_spot(walk->dst.virt.addr, bsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) walk->src.virt.addr = walk->dst.virt.addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) scatterwalk_copychunks(walk->src.virt.addr, &walk->in, bsize, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) walk->nbytes = bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) walk->flags |= SKCIPHER_WALK_SLOW;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) static int skcipher_next_copy(struct skcipher_walk *walk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) struct skcipher_walk_buffer *p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) u8 *tmp = walk->page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) skcipher_map_src(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) memcpy(tmp, walk->src.virt.addr, walk->nbytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) skcipher_unmap_src(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) walk->src.virt.addr = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) walk->dst.virt.addr = tmp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) if (!(walk->flags & SKCIPHER_WALK_PHYS))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) p = kmalloc(sizeof(*p), skcipher_walk_gfp(walk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) if (!p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) p->data = walk->page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) p->len = walk->nbytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) skcipher_queue_write(walk, p);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) if (offset_in_page(walk->page) + walk->nbytes + walk->stride >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) PAGE_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) walk->page = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) walk->page += walk->nbytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) static int skcipher_next_fast(struct skcipher_walk *walk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) unsigned long diff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) walk->src.phys.page = scatterwalk_page(&walk->in);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) walk->src.phys.offset = offset_in_page(walk->in.offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) walk->dst.phys.page = scatterwalk_page(&walk->out);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) walk->dst.phys.offset = offset_in_page(walk->out.offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) if (walk->flags & SKCIPHER_WALK_PHYS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) diff = walk->src.phys.offset - walk->dst.phys.offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) diff |= walk->src.virt.page - walk->dst.virt.page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) skcipher_map_src(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) walk->dst.virt.addr = walk->src.virt.addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) if (diff) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) walk->flags |= SKCIPHER_WALK_DIFF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) skcipher_map_dst(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) static int skcipher_walk_next(struct skcipher_walk *walk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) unsigned int bsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) unsigned int n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) walk->flags &= ~(SKCIPHER_WALK_SLOW | SKCIPHER_WALK_COPY |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) SKCIPHER_WALK_DIFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) n = walk->total;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) bsize = min(walk->stride, max(n, walk->blocksize));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) n = scatterwalk_clamp(&walk->in, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) n = scatterwalk_clamp(&walk->out, n);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) if (unlikely(n < bsize)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) if (unlikely(walk->total < walk->blocksize))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) return skcipher_walk_done(walk, -EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) slow_path:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) err = skcipher_next_slow(walk, bsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) goto set_phys_lowmem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) if (unlikely((walk->in.offset | walk->out.offset) & walk->alignmask)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) if (!walk->page) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) gfp_t gfp = skcipher_walk_gfp(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) walk->page = (void *)__get_free_page(gfp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) if (!walk->page)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) goto slow_path;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) walk->nbytes = min_t(unsigned, n,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) PAGE_SIZE - offset_in_page(walk->page));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) walk->flags |= SKCIPHER_WALK_COPY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) err = skcipher_next_copy(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) goto set_phys_lowmem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) walk->nbytes = n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) return skcipher_next_fast(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) set_phys_lowmem:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (!err && (walk->flags & SKCIPHER_WALK_PHYS)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) walk->src.phys.page = virt_to_page(walk->src.virt.addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) walk->dst.phys.page = virt_to_page(walk->dst.virt.addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) walk->src.phys.offset &= PAGE_SIZE - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) walk->dst.phys.offset &= PAGE_SIZE - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) static int skcipher_copy_iv(struct skcipher_walk *walk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) unsigned a = crypto_tfm_ctx_alignment() - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) unsigned alignmask = walk->alignmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) unsigned ivsize = walk->ivsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) unsigned bs = walk->stride;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) unsigned aligned_bs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) unsigned size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) u8 *iv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) aligned_bs = ALIGN(bs, alignmask + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) /* Minimum size to align buffer by alignmask. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) size = alignmask & ~a;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) if (walk->flags & SKCIPHER_WALK_PHYS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) size += ivsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) size += aligned_bs + ivsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) /* Minimum size to ensure buffer does not straddle a page. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) size += (bs - 1) & ~(alignmask | a);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) walk->buffer = kmalloc(size, skcipher_walk_gfp(walk));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) if (!walk->buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) iv = PTR_ALIGN(walk->buffer, alignmask + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) iv = skcipher_get_spot(iv, bs) + aligned_bs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) walk->iv = memcpy(iv, walk->iv, walk->ivsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) static int skcipher_walk_first(struct skcipher_walk *walk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) if (WARN_ON_ONCE(in_irq()))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) return -EDEADLK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) walk->buffer = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) if (unlikely(((unsigned long)walk->iv & walk->alignmask))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) int err = skcipher_copy_iv(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) walk->page = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) return skcipher_walk_next(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) static int skcipher_walk_skcipher(struct skcipher_walk *walk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) struct skcipher_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) walk->total = req->cryptlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) walk->nbytes = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) walk->iv = req->iv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) walk->oiv = req->iv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (unlikely(!walk->total))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) scatterwalk_start(&walk->in, req->src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) scatterwalk_start(&walk->out, req->dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) walk->flags &= ~SKCIPHER_WALK_SLEEP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) walk->flags |= req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) SKCIPHER_WALK_SLEEP : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) walk->blocksize = crypto_skcipher_blocksize(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) walk->stride = crypto_skcipher_walksize(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) walk->ivsize = crypto_skcipher_ivsize(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) walk->alignmask = crypto_skcipher_alignmask(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) return skcipher_walk_first(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) int skcipher_walk_virt(struct skcipher_walk *walk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) struct skcipher_request *req, bool atomic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) might_sleep_if(req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) walk->flags &= ~SKCIPHER_WALK_PHYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) err = skcipher_walk_skcipher(walk, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) walk->flags &= atomic ? ~SKCIPHER_WALK_SLEEP : ~0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) EXPORT_SYMBOL_GPL(skcipher_walk_virt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) void skcipher_walk_atomise(struct skcipher_walk *walk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) walk->flags &= ~SKCIPHER_WALK_SLEEP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) EXPORT_SYMBOL_GPL(skcipher_walk_atomise);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) int skcipher_walk_async(struct skcipher_walk *walk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) struct skcipher_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) walk->flags |= SKCIPHER_WALK_PHYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) INIT_LIST_HEAD(&walk->buffers);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) return skcipher_walk_skcipher(walk, req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) EXPORT_SYMBOL_GPL(skcipher_walk_async);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) static int skcipher_walk_aead_common(struct skcipher_walk *walk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) struct aead_request *req, bool atomic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) struct crypto_aead *tfm = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) walk->nbytes = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) walk->iv = req->iv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) walk->oiv = req->iv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) if (unlikely(!walk->total))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) walk->flags &= ~SKCIPHER_WALK_PHYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) scatterwalk_start(&walk->in, req->src);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) scatterwalk_start(&walk->out, req->dst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) scatterwalk_copychunks(NULL, &walk->in, req->assoclen, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) scatterwalk_copychunks(NULL, &walk->out, req->assoclen, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) scatterwalk_done(&walk->in, 0, walk->total);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) scatterwalk_done(&walk->out, 0, walk->total);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) if (req->base.flags & CRYPTO_TFM_REQ_MAY_SLEEP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) walk->flags |= SKCIPHER_WALK_SLEEP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) walk->flags &= ~SKCIPHER_WALK_SLEEP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) walk->blocksize = crypto_aead_blocksize(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) walk->stride = crypto_aead_chunksize(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) walk->ivsize = crypto_aead_ivsize(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) walk->alignmask = crypto_aead_alignmask(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) err = skcipher_walk_first(walk);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) if (atomic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) walk->flags &= ~SKCIPHER_WALK_SLEEP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) int skcipher_walk_aead_encrypt(struct skcipher_walk *walk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) struct aead_request *req, bool atomic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) walk->total = req->cryptlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) return skcipher_walk_aead_common(walk, req, atomic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) EXPORT_SYMBOL_GPL(skcipher_walk_aead_encrypt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) int skcipher_walk_aead_decrypt(struct skcipher_walk *walk,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) struct aead_request *req, bool atomic)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) struct crypto_aead *tfm = crypto_aead_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) walk->total = req->cryptlen - crypto_aead_authsize(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) return skcipher_walk_aead_common(walk, req, atomic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) EXPORT_SYMBOL_GPL(skcipher_walk_aead_decrypt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) static void skcipher_set_needkey(struct crypto_skcipher *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) if (crypto_skcipher_max_keysize(tfm) != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) crypto_skcipher_set_flags(tfm, CRYPTO_TFM_NEED_KEY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) static int skcipher_setkey_unaligned(struct crypto_skcipher *tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) const u8 *key, unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) unsigned long alignmask = crypto_skcipher_alignmask(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) struct skcipher_alg *cipher = crypto_skcipher_alg(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) u8 *buffer, *alignbuffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) unsigned long absize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) absize = keylen + alignmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) buffer = kmalloc(absize, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) if (!buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) alignbuffer = (u8 *)ALIGN((unsigned long)buffer, alignmask + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) memcpy(alignbuffer, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) ret = cipher->setkey(tfm, alignbuffer, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) kfree_sensitive(buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) int crypto_skcipher_setkey(struct crypto_skcipher *tfm, const u8 *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) struct skcipher_alg *cipher = crypto_skcipher_alg(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) unsigned long alignmask = crypto_skcipher_alignmask(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) if (keylen < cipher->min_keysize || keylen > cipher->max_keysize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) if ((unsigned long)key & alignmask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) err = skcipher_setkey_unaligned(tfm, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) err = cipher->setkey(tfm, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) if (unlikely(err)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) skcipher_set_needkey(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) crypto_skcipher_clear_flags(tfm, CRYPTO_TFM_NEED_KEY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) EXPORT_SYMBOL_GPL(crypto_skcipher_setkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) int crypto_skcipher_encrypt(struct skcipher_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627) struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) struct crypto_alg *alg = tfm->base.__crt_alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) unsigned int cryptlen = req->cryptlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632) crypto_stats_get(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) if (crypto_skcipher_get_flags(tfm) & CRYPTO_TFM_NEED_KEY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) ret = -ENOKEY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) ret = crypto_skcipher_alg(tfm)->encrypt(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) crypto_stats_skcipher_encrypt(cryptlen, ret, alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) EXPORT_SYMBOL_GPL(crypto_skcipher_encrypt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) int crypto_skcipher_decrypt(struct skcipher_request *req)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) struct crypto_alg *alg = tfm->base.__crt_alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) unsigned int cryptlen = req->cryptlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) crypto_stats_get(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) if (crypto_skcipher_get_flags(tfm) & CRYPTO_TFM_NEED_KEY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) ret = -ENOKEY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) ret = crypto_skcipher_alg(tfm)->decrypt(req);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) crypto_stats_skcipher_decrypt(cryptlen, ret, alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) EXPORT_SYMBOL_GPL(crypto_skcipher_decrypt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) static void crypto_skcipher_exit_tfm(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) struct crypto_skcipher *skcipher = __crypto_skcipher_cast(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) struct skcipher_alg *alg = crypto_skcipher_alg(skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) alg->exit(skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) static int crypto_skcipher_init_tfm(struct crypto_tfm *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) struct crypto_skcipher *skcipher = __crypto_skcipher_cast(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) struct skcipher_alg *alg = crypto_skcipher_alg(skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) skcipher_set_needkey(skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) if (alg->exit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) skcipher->base.exit = crypto_skcipher_exit_tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) if (alg->init)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) return alg->init(skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) static void crypto_skcipher_free_instance(struct crypto_instance *inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) struct skcipher_instance *skcipher =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) container_of(inst, struct skcipher_instance, s.base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) skcipher->free(skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) static void crypto_skcipher_show(struct seq_file *m, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) __maybe_unused;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) static void crypto_skcipher_show(struct seq_file *m, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) struct skcipher_alg *skcipher = container_of(alg, struct skcipher_alg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) seq_printf(m, "type : skcipher\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) seq_printf(m, "async : %s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) alg->cra_flags & CRYPTO_ALG_ASYNC ? "yes" : "no");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701) seq_printf(m, "blocksize : %u\n", alg->cra_blocksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) seq_printf(m, "min keysize : %u\n", skcipher->min_keysize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) seq_printf(m, "max keysize : %u\n", skcipher->max_keysize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) seq_printf(m, "ivsize : %u\n", skcipher->ivsize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) seq_printf(m, "chunksize : %u\n", skcipher->chunksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) seq_printf(m, "walksize : %u\n", skcipher->walksize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) #ifdef CONFIG_NET
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) static int crypto_skcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) struct crypto_report_blkcipher rblkcipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) struct skcipher_alg *skcipher = container_of(alg, struct skcipher_alg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) memset(&rblkcipher, 0, sizeof(rblkcipher));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) strscpy(rblkcipher.type, "skcipher", sizeof(rblkcipher.type));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719) strscpy(rblkcipher.geniv, "<none>", sizeof(rblkcipher.geniv));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) rblkcipher.blocksize = alg->cra_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) rblkcipher.min_keysize = skcipher->min_keysize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723) rblkcipher.max_keysize = skcipher->max_keysize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) rblkcipher.ivsize = skcipher->ivsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) return nla_put(skb, CRYPTOCFGA_REPORT_BLKCIPHER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) sizeof(rblkcipher), &rblkcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) static int crypto_skcipher_report(struct sk_buff *skb, struct crypto_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732) return -ENOSYS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736) static const struct crypto_type crypto_skcipher_type = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) .extsize = crypto_alg_extsize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) .init_tfm = crypto_skcipher_init_tfm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) .free = crypto_skcipher_free_instance,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) #ifdef CONFIG_PROC_FS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) .show = crypto_skcipher_show,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) .report = crypto_skcipher_report,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744) .maskclear = ~CRYPTO_ALG_TYPE_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) .maskset = CRYPTO_ALG_TYPE_MASK,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746) .type = CRYPTO_ALG_TYPE_SKCIPHER,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) .tfmsize = offsetof(struct crypto_skcipher, base),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) int crypto_grab_skcipher(struct crypto_skcipher_spawn *spawn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) struct crypto_instance *inst,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) const char *name, u32 type, u32 mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) spawn->base.frontend = &crypto_skcipher_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755) return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757) EXPORT_SYMBOL_GPL(crypto_grab_skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759) struct crypto_skcipher *crypto_alloc_skcipher(const char *alg_name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) u32 type, u32 mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) return crypto_alloc_tfm(alg_name, &crypto_skcipher_type, type, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) EXPORT_SYMBOL_GPL(crypto_alloc_skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) struct crypto_sync_skcipher *crypto_alloc_sync_skcipher(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) const char *alg_name, u32 type, u32 mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) struct crypto_skcipher *tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) /* Only sync algorithms allowed. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) mask |= CRYPTO_ALG_ASYNC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) tfm = crypto_alloc_tfm(alg_name, &crypto_skcipher_type, type, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) * Make sure we do not allocate something that might get used with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) * an on-stack request: check the request size.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) if (!IS_ERR(tfm) && WARN_ON(crypto_skcipher_reqsize(tfm) >
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) MAX_SYNC_SKCIPHER_REQSIZE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) crypto_free_skcipher(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) return ERR_PTR(-EINVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) return (struct crypto_sync_skcipher *)tfm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) EXPORT_SYMBOL_GPL(crypto_alloc_sync_skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) int crypto_has_skcipher(const char *alg_name, u32 type, u32 mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) return crypto_type_has_alg(alg_name, &crypto_skcipher_type, type, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) EXPORT_SYMBOL_GPL(crypto_has_skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) static int skcipher_prepare_alg(struct skcipher_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) struct crypto_alg *base = &alg->base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) if (alg->ivsize > PAGE_SIZE / 8 || alg->chunksize > PAGE_SIZE / 8 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) alg->walksize > PAGE_SIZE / 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) if (!alg->chunksize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) alg->chunksize = base->cra_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806) if (!alg->walksize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) alg->walksize = alg->chunksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) base->cra_type = &crypto_skcipher_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) base->cra_flags |= CRYPTO_ALG_TYPE_SKCIPHER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816) int crypto_register_skcipher(struct skcipher_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) struct crypto_alg *base = &alg->base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) err = skcipher_prepare_alg(alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) return crypto_register_alg(base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) EXPORT_SYMBOL_GPL(crypto_register_skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) void crypto_unregister_skcipher(struct skcipher_alg *alg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831) crypto_unregister_alg(&alg->base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) EXPORT_SYMBOL_GPL(crypto_unregister_skcipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) int crypto_register_skciphers(struct skcipher_alg *algs, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) for (i = 0; i < count; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) ret = crypto_register_skcipher(&algs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848) for (--i; i >= 0; --i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) crypto_unregister_skcipher(&algs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) EXPORT_SYMBOL_GPL(crypto_register_skciphers);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) void crypto_unregister_skciphers(struct skcipher_alg *algs, int count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) for (i = count - 1; i >= 0; --i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860) crypto_unregister_skcipher(&algs[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) EXPORT_SYMBOL_GPL(crypto_unregister_skciphers);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) int skcipher_register_instance(struct crypto_template *tmpl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) struct skcipher_instance *inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) if (WARN_ON(!inst->free))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) err = skcipher_prepare_alg(&inst->alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876) return crypto_register_instance(tmpl, skcipher_crypto_instance(inst));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) EXPORT_SYMBOL_GPL(skcipher_register_instance);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) static int skcipher_setkey_simple(struct crypto_skcipher *tfm, const u8 *key,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) unsigned int keylen)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) struct crypto_cipher *cipher = skcipher_cipher_simple(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) crypto_cipher_clear_flags(cipher, CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) crypto_cipher_set_flags(cipher, crypto_skcipher_get_flags(tfm) &
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) CRYPTO_TFM_REQ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) return crypto_cipher_setkey(cipher, key, keylen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) static int skcipher_init_tfm_simple(struct crypto_skcipher *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) struct skcipher_instance *inst = skcipher_alg_instance(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) struct crypto_cipher_spawn *spawn = skcipher_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895) struct skcipher_ctx_simple *ctx = crypto_skcipher_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) struct crypto_cipher *cipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898) cipher = crypto_spawn_cipher(spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) if (IS_ERR(cipher))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) return PTR_ERR(cipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) ctx->cipher = cipher;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906) static void skcipher_exit_tfm_simple(struct crypto_skcipher *tfm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) struct skcipher_ctx_simple *ctx = crypto_skcipher_ctx(tfm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910) crypto_free_cipher(ctx->cipher);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) static void skcipher_free_instance_simple(struct skcipher_instance *inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) crypto_drop_cipher(skcipher_instance_ctx(inst));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916) kfree(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) * skcipher_alloc_instance_simple - allocate instance of simple block cipher mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) * Allocate an skcipher_instance for a simple block cipher mode of operation,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) * e.g. cbc or ecb. The instance context will have just a single crypto_spawn,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) * that for the underlying cipher. The {min,max}_keysize, ivsize, blocksize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) * alignmask, and priority are set from the underlying cipher but can be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) * overridden if needed. The tfm context defaults to skcipher_ctx_simple, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927) * default ->setkey(), ->init(), and ->exit() methods are installed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) * @tmpl: the template being instantiated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) * @tb: the template parameters
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) * Return: a pointer to the new instance, or an ERR_PTR(). The caller still
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933) * needs to register the instance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) struct skcipher_instance *skcipher_alloc_instance_simple(
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) struct crypto_template *tmpl, struct rtattr **tb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) u32 mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) struct skcipher_instance *inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) struct crypto_cipher_spawn *spawn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941) struct crypto_alg *cipher_alg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944) err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_SKCIPHER, &mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) if (!inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) return ERR_PTR(-ENOMEM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) spawn = skcipher_instance_ctx(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953) err = crypto_grab_cipher(spawn, skcipher_crypto_instance(inst),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) crypto_attr_alg_name(tb[1]), 0, mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) cipher_alg = crypto_spawn_cipher_alg(spawn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) err = crypto_inst_setname(skcipher_crypto_instance(inst), tmpl->name,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960) cipher_alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) goto err_free_inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) inst->free = skcipher_free_instance_simple;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) /* Default algorithm properties, can be overridden */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) inst->alg.base.cra_blocksize = cipher_alg->cra_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968) inst->alg.base.cra_alignmask = cipher_alg->cra_alignmask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) inst->alg.base.cra_priority = cipher_alg->cra_priority;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) inst->alg.min_keysize = cipher_alg->cra_cipher.cia_min_keysize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) inst->alg.max_keysize = cipher_alg->cra_cipher.cia_max_keysize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972) inst->alg.ivsize = cipher_alg->cra_blocksize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) /* Use skcipher_ctx_simple by default, can be overridden */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975) inst->alg.base.cra_ctxsize = sizeof(struct skcipher_ctx_simple);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) inst->alg.setkey = skcipher_setkey_simple;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) inst->alg.init = skcipher_init_tfm_simple;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) inst->alg.exit = skcipher_exit_tfm_simple;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980) return inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) err_free_inst:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983) skcipher_free_instance_simple(inst);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) return ERR_PTR(err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) EXPORT_SYMBOL_GPL(skcipher_alloc_instance_simple);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) MODULE_DESCRIPTION("Symmetric key cipher type");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990) MODULE_IMPORT_NS(CRYPTO_INTERNAL);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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