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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/net/sunrpc/auth_gss/gss_krb5_seqnum.c
..
..
@@ -39,56 +39,15 @@
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39
 # define RPCDBG_FACILITY        RPCDBG_AUTH
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 #endif
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41
 
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-static s32
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-krb5_make_rc4_seq_num(struct krb5_ctx *kctx, int direction, s32 seqnum,
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-		      unsigned char *cksum, unsigned char *buf)
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-{
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-	struct crypto_skcipher *cipher;
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-	unsigned char *plain;
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-	s32 code;
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-
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-	dprintk("RPC:       %s:\n", __func__);
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-	cipher = crypto_alloc_skcipher(kctx->gk5e->encrypt_name, 0,
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-				       CRYPTO_ALG_ASYNC);
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-	if (IS_ERR(cipher))
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-		return PTR_ERR(cipher);
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-
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-	plain = kmalloc(8, GFP_NOFS);
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-	if (!plain)
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-		return -ENOMEM;
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-
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-	plain[0] = (unsigned char) ((seqnum >> 24) & 0xff);
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-	plain[1] = (unsigned char) ((seqnum >> 16) & 0xff);
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-	plain[2] = (unsigned char) ((seqnum >> 8) & 0xff);
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-	plain[3] = (unsigned char) ((seqnum >> 0) & 0xff);
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-	plain[4] = direction;
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-	plain[5] = direction;
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-	plain[6] = direction;
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-	plain[7] = direction;
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-
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-	code = krb5_rc4_setup_seq_key(kctx, cipher, cksum);
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-	if (code)
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-		goto out;
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-
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-	code = krb5_encrypt(cipher, cksum, plain, buf, 8);
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-out:
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-	crypto_free_skcipher(cipher);
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-	kfree(plain);
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-	return code;
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-}
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42
 s32
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43
 krb5_make_seq_num(struct krb5_ctx *kctx,
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-		struct crypto_skcipher *key,
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+		struct crypto_sync_skcipher *key,
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 		int direction,
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46
 		u32 seqnum,
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 		unsigned char *cksum, unsigned char *buf)
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48
 {
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49
 	unsigned char *plain;
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50
 	s32 code;
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-
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-	if (kctx->enctype == ENCTYPE_ARCFOUR_HMAC)
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-		return krb5_make_rc4_seq_num(kctx, direction, seqnum,
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-					     cksum, buf);
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51
 
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 	plain = kmalloc(8, GFP_NOFS);
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53
 	if (!plain)
..
..
@@ -109,51 +68,6 @@
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 	return code;
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 }
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70
 
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-static s32
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-krb5_get_rc4_seq_num(struct krb5_ctx *kctx, unsigned char *cksum,
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-		     unsigned char *buf, int *direction, s32 *seqnum)
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-{
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-	struct crypto_skcipher *cipher;
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-	unsigned char *plain;
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-	s32 code;
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-
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-	dprintk("RPC:       %s:\n", __func__);
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-	cipher = crypto_alloc_skcipher(kctx->gk5e->encrypt_name, 0,
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-				       CRYPTO_ALG_ASYNC);
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-	if (IS_ERR(cipher))
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-		return PTR_ERR(cipher);
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-
126
-	code = krb5_rc4_setup_seq_key(kctx, cipher, cksum);
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-	if (code)
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-		goto out;
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-
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-	plain = kmalloc(8, GFP_NOFS);
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-	if (!plain) {
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-		code = -ENOMEM;
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-		goto out;
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-	}
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-
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-	code = krb5_decrypt(cipher, cksum, buf, plain, 8);
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-	if (code)
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-		goto out_plain;
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-
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-	if ((plain[4] != plain[5]) || (plain[4] != plain[6])
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-				   || (plain[4] != plain[7])) {
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-		code = (s32)KG_BAD_SEQ;
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-		goto out_plain;
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-	}
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-
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-	*direction = plain[4];
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-
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-	*seqnum = ((plain[0] << 24) | (plain[1] << 16) |
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-					(plain[2] << 8) | (plain[3]));
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-out_plain:
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-	kfree(plain);
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-out:
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-	crypto_free_skcipher(cipher);
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-	return code;
155
-}
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-
157
71
 s32
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72
 krb5_get_seq_num(struct krb5_ctx *kctx,
159
73
 	       unsigned char *cksum,
..
..
@@ -161,14 +75,11 @@
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75
 	       int *direction, u32 *seqnum)
162
76
 {
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77
 	s32 code;
164
-	struct crypto_skcipher *key = kctx->seq;
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78
 	unsigned char *plain;
79
+	struct crypto_sync_skcipher *key = kctx->seq;
166
80
 
167
81
 	dprintk("RPC:       krb5_get_seq_num:\n");
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82
 
169
-	if (kctx->enctype == ENCTYPE_ARCFOUR_HMAC)
170
-		return krb5_get_rc4_seq_num(kctx, cksum, buf,
171
-					    direction, seqnum);
172
83
 	plain = kmalloc(8, GFP_NOFS);
173
84
 	if (!plain)
174
85
 		return -ENOMEM;