^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) * Glue code for MD5 implementation for PPC assembler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Based on generic implementation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (c) 2015 Markus Stockhausen <stockhausen@collogia.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <crypto/internal/hash.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <crypto/md5.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/byteorder.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) extern void ppc_md5_transform(u32 *state, const u8 *src, u32 blocks);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static inline void ppc_md5_clear_context(struct md5_state *sctx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) int count = sizeof(struct md5_state) >> 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) u32 *ptr = (u32 *)sctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* make sure we can clear the fast way */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) BUILD_BUG_ON(sizeof(struct md5_state) % 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) do { *ptr++ = 0; } while (--count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static int ppc_md5_init(struct shash_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) struct md5_state *sctx = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) sctx->hash[0] = MD5_H0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) sctx->hash[1] = MD5_H1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) sctx->hash[2] = MD5_H2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) sctx->hash[3] = MD5_H3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) sctx->byte_count = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return 0;
^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 ppc_md5_update(struct shash_desc *desc, const u8 *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) unsigned int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct md5_state *sctx = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) const unsigned int offset = sctx->byte_count & 0x3f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) unsigned int avail = 64 - offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) const u8 *src = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) sctx->byte_count += len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) if (avail > len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) memcpy((char *)sctx->block + offset, src, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) if (offset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) memcpy((char *)sctx->block + offset, src, avail);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) ppc_md5_transform(sctx->hash, (const u8 *)sctx->block, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) len -= avail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) src += avail;
^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) if (len > 63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) ppc_md5_transform(sctx->hash, src, len >> 6);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) src += len & ~0x3f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) len &= 0x3f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) memcpy((char *)sctx->block, src, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return 0;
^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 ppc_md5_final(struct shash_desc *desc, u8 *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) struct md5_state *sctx = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) const unsigned int offset = sctx->byte_count & 0x3f;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) const u8 *src = (const u8 *)sctx->block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) u8 *p = (u8 *)src + offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) int padlen = 55 - offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) __le64 *pbits = (__le64 *)((char *)sctx->block + 56);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) __le32 *dst = (__le32 *)out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) *p++ = 0x80;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (padlen < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) memset(p, 0x00, padlen + sizeof (u64));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) ppc_md5_transform(sctx->hash, src, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) p = (char *)sctx->block;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) padlen = 56;
^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) memset(p, 0, padlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) *pbits = cpu_to_le64(sctx->byte_count << 3);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) ppc_md5_transform(sctx->hash, src, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) dst[0] = cpu_to_le32(sctx->hash[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) dst[1] = cpu_to_le32(sctx->hash[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) dst[2] = cpu_to_le32(sctx->hash[2]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) dst[3] = cpu_to_le32(sctx->hash[3]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) ppc_md5_clear_context(sctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static int ppc_md5_export(struct shash_desc *desc, void *out)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) struct md5_state *sctx = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) memcpy(out, sctx, sizeof(*sctx));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static int ppc_md5_import(struct shash_desc *desc, const void *in)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) struct md5_state *sctx = shash_desc_ctx(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) memcpy(sctx, in, sizeof(*sctx));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) return 0;
^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 shash_alg alg = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .digestsize = MD5_DIGEST_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) .init = ppc_md5_init,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .update = ppc_md5_update,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) .final = ppc_md5_final,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) .export = ppc_md5_export,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) .import = ppc_md5_import,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) .descsize = sizeof(struct md5_state),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) .statesize = sizeof(struct md5_state),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) .base = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) .cra_name = "md5",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) .cra_driver_name= "md5-ppc",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) .cra_priority = 200,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) .cra_blocksize = MD5_HMAC_BLOCK_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) .cra_module = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static int __init ppc_md5_mod_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return crypto_register_shash(&alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static void __exit ppc_md5_mod_fini(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) crypto_unregister_shash(&alg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) module_init(ppc_md5_mod_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) module_exit(ppc_md5_mod_fini);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) MODULE_DESCRIPTION("MD5 Secure Hash Algorithm, PPC assembler");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) MODULE_ALIAS_CRYPTO("md5");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) MODULE_ALIAS_CRYPTO("md5-ppc");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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