Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu: "This fixes a number of concurrency issues on s390 where multiple users of the same crypto transform may clobber each other's results" * git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: crypto: s390 - fix des and des3_ede ctr concurrency issue crypto: s390 - fix des and des3_ede cbc concurrency issue crypto: s390 - fix concurrency issue in aes-ctr mode
This commit is contained in:
commit
4293242db1
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@ -25,6 +25,7 @@
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/spinlock.h>
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#include "crypt_s390.h"
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#define AES_KEYLEN_128 1
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@ -32,6 +33,7 @@
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#define AES_KEYLEN_256 4
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static u8 *ctrblk;
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static DEFINE_SPINLOCK(ctrblk_lock);
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static char keylen_flag;
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struct s390_aes_ctx {
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@ -758,43 +760,67 @@ static int ctr_aes_set_key(struct crypto_tfm *tfm, const u8 *in_key,
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return aes_set_key(tfm, in_key, key_len);
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}
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static unsigned int __ctrblk_init(u8 *ctrptr, unsigned int nbytes)
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{
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unsigned int i, n;
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/* only use complete blocks, max. PAGE_SIZE */
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n = (nbytes > PAGE_SIZE) ? PAGE_SIZE : nbytes & ~(AES_BLOCK_SIZE - 1);
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for (i = AES_BLOCK_SIZE; i < n; i += AES_BLOCK_SIZE) {
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memcpy(ctrptr + i, ctrptr + i - AES_BLOCK_SIZE,
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AES_BLOCK_SIZE);
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crypto_inc(ctrptr + i, AES_BLOCK_SIZE);
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}
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return n;
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}
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static int ctr_aes_crypt(struct blkcipher_desc *desc, long func,
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struct s390_aes_ctx *sctx, struct blkcipher_walk *walk)
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{
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int ret = blkcipher_walk_virt_block(desc, walk, AES_BLOCK_SIZE);
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unsigned int i, n, nbytes;
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u8 buf[AES_BLOCK_SIZE];
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u8 *out, *in;
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unsigned int n, nbytes;
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u8 buf[AES_BLOCK_SIZE], ctrbuf[AES_BLOCK_SIZE];
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u8 *out, *in, *ctrptr = ctrbuf;
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if (!walk->nbytes)
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return ret;
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memcpy(ctrblk, walk->iv, AES_BLOCK_SIZE);
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if (spin_trylock(&ctrblk_lock))
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ctrptr = ctrblk;
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memcpy(ctrptr, walk->iv, AES_BLOCK_SIZE);
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while ((nbytes = walk->nbytes) >= AES_BLOCK_SIZE) {
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out = walk->dst.virt.addr;
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in = walk->src.virt.addr;
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while (nbytes >= AES_BLOCK_SIZE) {
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/* only use complete blocks, max. PAGE_SIZE */
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n = (nbytes > PAGE_SIZE) ? PAGE_SIZE :
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nbytes & ~(AES_BLOCK_SIZE - 1);
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for (i = AES_BLOCK_SIZE; i < n; i += AES_BLOCK_SIZE) {
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memcpy(ctrblk + i, ctrblk + i - AES_BLOCK_SIZE,
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AES_BLOCK_SIZE);
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crypto_inc(ctrblk + i, AES_BLOCK_SIZE);
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}
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ret = crypt_s390_kmctr(func, sctx->key, out, in, n, ctrblk);
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if (ret < 0 || ret != n)
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if (ctrptr == ctrblk)
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n = __ctrblk_init(ctrptr, nbytes);
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else
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n = AES_BLOCK_SIZE;
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ret = crypt_s390_kmctr(func, sctx->key, out, in,
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n, ctrptr);
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if (ret < 0 || ret != n) {
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if (ctrptr == ctrblk)
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spin_unlock(&ctrblk_lock);
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return -EIO;
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}
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if (n > AES_BLOCK_SIZE)
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memcpy(ctrblk, ctrblk + n - AES_BLOCK_SIZE,
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memcpy(ctrptr, ctrptr + n - AES_BLOCK_SIZE,
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AES_BLOCK_SIZE);
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crypto_inc(ctrblk, AES_BLOCK_SIZE);
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crypto_inc(ctrptr, AES_BLOCK_SIZE);
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out += n;
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in += n;
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nbytes -= n;
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}
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ret = blkcipher_walk_done(desc, walk, nbytes);
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}
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if (ctrptr == ctrblk) {
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if (nbytes)
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memcpy(ctrbuf, ctrptr, AES_BLOCK_SIZE);
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else
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memcpy(walk->iv, ctrptr, AES_BLOCK_SIZE);
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spin_unlock(&ctrblk_lock);
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}
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/*
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* final block may be < AES_BLOCK_SIZE, copy only nbytes
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*/
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@ -802,14 +828,15 @@ static int ctr_aes_crypt(struct blkcipher_desc *desc, long func,
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out = walk->dst.virt.addr;
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in = walk->src.virt.addr;
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ret = crypt_s390_kmctr(func, sctx->key, buf, in,
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AES_BLOCK_SIZE, ctrblk);
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AES_BLOCK_SIZE, ctrbuf);
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if (ret < 0 || ret != AES_BLOCK_SIZE)
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return -EIO;
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memcpy(out, buf, nbytes);
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crypto_inc(ctrblk, AES_BLOCK_SIZE);
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crypto_inc(ctrbuf, AES_BLOCK_SIZE);
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ret = blkcipher_walk_done(desc, walk, 0);
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memcpy(walk->iv, ctrbuf, AES_BLOCK_SIZE);
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}
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memcpy(walk->iv, ctrblk, AES_BLOCK_SIZE);
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return ret;
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}
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@ -25,6 +25,7 @@
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#define DES3_KEY_SIZE (3 * DES_KEY_SIZE)
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static u8 *ctrblk;
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static DEFINE_SPINLOCK(ctrblk_lock);
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struct s390_des_ctx {
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u8 iv[DES_BLOCK_SIZE];
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@ -105,29 +106,35 @@ static int ecb_desall_crypt(struct blkcipher_desc *desc, long func,
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}
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static int cbc_desall_crypt(struct blkcipher_desc *desc, long func,
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u8 *iv, struct blkcipher_walk *walk)
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struct blkcipher_walk *walk)
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{
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struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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int ret = blkcipher_walk_virt(desc, walk);
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unsigned int nbytes = walk->nbytes;
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struct {
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u8 iv[DES_BLOCK_SIZE];
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u8 key[DES3_KEY_SIZE];
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} param;
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if (!nbytes)
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goto out;
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memcpy(iv, walk->iv, DES_BLOCK_SIZE);
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memcpy(param.iv, walk->iv, DES_BLOCK_SIZE);
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memcpy(param.key, ctx->key, DES3_KEY_SIZE);
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do {
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/* only use complete blocks */
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unsigned int n = nbytes & ~(DES_BLOCK_SIZE - 1);
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u8 *out = walk->dst.virt.addr;
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u8 *in = walk->src.virt.addr;
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ret = crypt_s390_kmc(func, iv, out, in, n);
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ret = crypt_s390_kmc(func, ¶m, out, in, n);
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if (ret < 0 || ret != n)
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return -EIO;
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nbytes &= DES_BLOCK_SIZE - 1;
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ret = blkcipher_walk_done(desc, walk, nbytes);
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} while ((nbytes = walk->nbytes));
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memcpy(walk->iv, iv, DES_BLOCK_SIZE);
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memcpy(walk->iv, param.iv, DES_BLOCK_SIZE);
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out:
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return ret;
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@ -179,22 +186,20 @@ static int cbc_des_encrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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return cbc_desall_crypt(desc, KMC_DEA_ENCRYPT, ctx->iv, &walk);
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return cbc_desall_crypt(desc, KMC_DEA_ENCRYPT, &walk);
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}
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static int cbc_des_decrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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return cbc_desall_crypt(desc, KMC_DEA_DECRYPT, ctx->iv, &walk);
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return cbc_desall_crypt(desc, KMC_DEA_DECRYPT, &walk);
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}
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static struct crypto_alg cbc_des_alg = {
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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return cbc_desall_crypt(desc, KMC_TDEA_192_ENCRYPT, ctx->iv, &walk);
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return cbc_desall_crypt(desc, KMC_TDEA_192_ENCRYPT, &walk);
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}
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static int cbc_des3_decrypt(struct blkcipher_desc *desc,
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struct scatterlist *dst, struct scatterlist *src,
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unsigned int nbytes)
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{
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struct s390_des_ctx *ctx = crypto_blkcipher_ctx(desc->tfm);
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struct blkcipher_walk walk;
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blkcipher_walk_init(&walk, dst, src, nbytes);
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return cbc_desall_crypt(desc, KMC_TDEA_192_DECRYPT, ctx->iv, &walk);
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return cbc_desall_crypt(desc, KMC_TDEA_192_DECRYPT, &walk);
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}
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static struct crypto_alg cbc_des3_alg = {
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}
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};
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static unsigned int __ctrblk_init(u8 *ctrptr, unsigned int nbytes)
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{
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unsigned int i, n;
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/* align to block size, max. PAGE_SIZE */
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n = (nbytes > PAGE_SIZE) ? PAGE_SIZE : nbytes & ~(DES_BLOCK_SIZE - 1);
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for (i = DES_BLOCK_SIZE; i < n; i += DES_BLOCK_SIZE) {
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memcpy(ctrptr + i, ctrptr + i - DES_BLOCK_SIZE, DES_BLOCK_SIZE);
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crypto_inc(ctrptr + i, DES_BLOCK_SIZE);
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}
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return n;
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}
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static int ctr_desall_crypt(struct blkcipher_desc *desc, long func,
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struct s390_des_ctx *ctx, struct blkcipher_walk *walk)
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struct s390_des_ctx *ctx,
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struct blkcipher_walk *walk)
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{
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int ret = blkcipher_walk_virt_block(desc, walk, DES_BLOCK_SIZE);
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unsigned int i, n, nbytes;
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u8 buf[DES_BLOCK_SIZE];
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u8 *out, *in;
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unsigned int n, nbytes;
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u8 buf[DES_BLOCK_SIZE], ctrbuf[DES_BLOCK_SIZE];
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u8 *out, *in, *ctrptr = ctrbuf;
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memcpy(ctrblk, walk->iv, DES_BLOCK_SIZE);
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if (!walk->nbytes)
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return ret;
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if (spin_trylock(&ctrblk_lock))
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ctrptr = ctrblk;
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memcpy(ctrptr, walk->iv, DES_BLOCK_SIZE);
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while ((nbytes = walk->nbytes) >= DES_BLOCK_SIZE) {
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out = walk->dst.virt.addr;
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in = walk->src.virt.addr;
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while (nbytes >= DES_BLOCK_SIZE) {
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/* align to block size, max. PAGE_SIZE */
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n = (nbytes > PAGE_SIZE) ? PAGE_SIZE :
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nbytes & ~(DES_BLOCK_SIZE - 1);
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for (i = DES_BLOCK_SIZE; i < n; i += DES_BLOCK_SIZE) {
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memcpy(ctrblk + i, ctrblk + i - DES_BLOCK_SIZE,
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DES_BLOCK_SIZE);
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crypto_inc(ctrblk + i, DES_BLOCK_SIZE);
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}
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ret = crypt_s390_kmctr(func, ctx->key, out, in, n, ctrblk);
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if (ret < 0 || ret != n)
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if (ctrptr == ctrblk)
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n = __ctrblk_init(ctrptr, nbytes);
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else
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n = DES_BLOCK_SIZE;
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ret = crypt_s390_kmctr(func, ctx->key, out, in,
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n, ctrptr);
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if (ret < 0 || ret != n) {
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if (ctrptr == ctrblk)
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spin_unlock(&ctrblk_lock);
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return -EIO;
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}
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if (n > DES_BLOCK_SIZE)
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memcpy(ctrblk, ctrblk + n - DES_BLOCK_SIZE,
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memcpy(ctrptr, ctrptr + n - DES_BLOCK_SIZE,
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DES_BLOCK_SIZE);
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crypto_inc(ctrblk, DES_BLOCK_SIZE);
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crypto_inc(ctrptr, DES_BLOCK_SIZE);
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out += n;
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in += n;
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nbytes -= n;
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}
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ret = blkcipher_walk_done(desc, walk, nbytes);
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}
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if (ctrptr == ctrblk) {
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if (nbytes)
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memcpy(ctrbuf, ctrptr, DES_BLOCK_SIZE);
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else
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memcpy(walk->iv, ctrptr, DES_BLOCK_SIZE);
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spin_unlock(&ctrblk_lock);
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}
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/* final block may be < DES_BLOCK_SIZE, copy only nbytes */
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if (nbytes) {
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out = walk->dst.virt.addr;
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in = walk->src.virt.addr;
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ret = crypt_s390_kmctr(func, ctx->key, buf, in,
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DES_BLOCK_SIZE, ctrblk);
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DES_BLOCK_SIZE, ctrbuf);
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if (ret < 0 || ret != DES_BLOCK_SIZE)
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return -EIO;
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memcpy(out, buf, nbytes);
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crypto_inc(ctrblk, DES_BLOCK_SIZE);
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crypto_inc(ctrbuf, DES_BLOCK_SIZE);
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ret = blkcipher_walk_done(desc, walk, 0);
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memcpy(walk->iv, ctrbuf, DES_BLOCK_SIZE);
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}
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memcpy(walk->iv, ctrblk, DES_BLOCK_SIZE);
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return ret;
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}
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