diff options
| -rw-r--r-- | drivers/crypto/nx/nx-842-powernv.c | 4 | ||||
| -rw-r--r-- | drivers/crypto/nx/nx-842-pseries.c | 8 | ||||
| -rw-r--r-- | lib/842/842.h | 2 | ||||
| -rw-r--r-- | lib/842/842_compress.c | 13 | ||||
| -rw-r--r-- | lib/842/842_decompress.c | 17 |
5 files changed, 40 insertions, 4 deletions
diff --git a/drivers/crypto/nx/nx-842-powernv.c b/drivers/crypto/nx/nx-842-powernv.c index 3750e13d8721..9ef51fafdbff 100644 --- a/drivers/crypto/nx/nx-842-powernv.c +++ b/drivers/crypto/nx/nx-842-powernv.c @@ -491,7 +491,7 @@ static int nx842_powernv_compress(const unsigned char *in, unsigned int inlen, void *wmem) { return nx842_powernv_function(in, inlen, out, outlenp, - wmem, CCW_FC_842_COMP_NOCRC); + wmem, CCW_FC_842_COMP_CRC); } /** @@ -519,7 +519,7 @@ static int nx842_powernv_decompress(const unsigned char *in, unsigned int inlen, void *wmem) { return nx842_powernv_function(in, inlen, out, outlenp, - wmem, CCW_FC_842_DECOMP_NOCRC); + wmem, CCW_FC_842_DECOMP_CRC); } static int __init nx842_powernv_probe(struct device_node *dn) diff --git a/drivers/crypto/nx/nx-842-pseries.c b/drivers/crypto/nx/nx-842-pseries.c index f4cbde03c6ad..cddc6d8b55d9 100644 --- a/drivers/crypto/nx/nx-842-pseries.c +++ b/drivers/crypto/nx/nx-842-pseries.c @@ -234,6 +234,10 @@ static int nx842_validate_result(struct device *dev, dev_dbg(dev, "%s: Out of space in output buffer\n", __func__); return -ENOSPC; + case 65: /* Calculated CRC doesn't match the passed value */ + dev_dbg(dev, "%s: CRC mismatch for decompression\n", + __func__); + return -EINVAL; case 66: /* Input data contains an illegal template field */ case 67: /* Template indicates data past the end of the input stream */ dev_dbg(dev, "%s: Bad data for decompression (code:%d)\n", @@ -324,7 +328,7 @@ static int nx842_pseries_compress(const unsigned char *in, unsigned int inlen, slout.entries = (struct nx842_slentry *)workmem->slout; /* Init operation */ - op.flags = NX842_OP_COMPRESS; + op.flags = NX842_OP_COMPRESS_CRC; csbcpb = &workmem->csbcpb; memset(csbcpb, 0, sizeof(*csbcpb)); op.csbcpb = nx842_get_pa(csbcpb); @@ -457,7 +461,7 @@ static int nx842_pseries_decompress(const unsigned char *in, unsigned int inlen, slout.entries = (struct nx842_slentry *)workmem->slout; /* Init operation */ - op.flags = NX842_OP_DECOMPRESS; + op.flags = NX842_OP_DECOMPRESS_CRC; csbcpb = &workmem->csbcpb; memset(csbcpb, 0, sizeof(*csbcpb)); op.csbcpb = nx842_get_pa(csbcpb); diff --git a/lib/842/842.h b/lib/842/842.h index 7c200030acf7..e0a122bc1cdb 100644 --- a/lib/842/842.h +++ b/lib/842/842.h @@ -76,6 +76,7 @@ #include <linux/module.h> #include <linux/kernel.h> #include <linux/bitops.h> +#include <linux/crc32.h> #include <asm/unaligned.h> #include <linux/sw842.h> @@ -98,6 +99,7 @@ #define I2_BITS (8) #define I4_BITS (9) #define I8_BITS (8) +#define CRC_BITS (32) #define REPEAT_BITS_MAX (0x3f) #define SHORT_DATA_BITS_MAX (0x7) diff --git a/lib/842/842_compress.c b/lib/842/842_compress.c index 7ce68948e68c..4051339bdfbd 100644 --- a/lib/842/842_compress.c +++ b/lib/842/842_compress.c @@ -490,6 +490,7 @@ int sw842_compress(const u8 *in, unsigned int ilen, int ret; u64 last, next, pad, total; u8 repeat_count = 0; + u32 crc; BUILD_BUG_ON(sizeof(*p) > SW842_MEM_COMPRESS); @@ -580,6 +581,18 @@ skip_comp: if (ret) return ret; + /* + * crc(0:31) is appended to target data starting with the next + * bit after End of stream template. + * nx842 calculates CRC for data in big-endian format. So doing + * same here so that sw842 decompression can be used for both + * compressed data. + */ + crc = crc32_be(0, in, ilen); + ret = add_bits(p, crc, CRC_BITS); + if (ret) + return ret; + if (p->bit) { p->out++; p->olen--; diff --git a/lib/842/842_decompress.c b/lib/842/842_decompress.c index 5446ff0c9ba0..8881dad2a6a0 100644 --- a/lib/842/842_decompress.c +++ b/lib/842/842_decompress.c @@ -285,6 +285,7 @@ int sw842_decompress(const u8 *in, unsigned int ilen, struct sw842_param p; int ret; u64 op, rep, tmp, bytes, total; + u64 crc; p.in = (u8 *)in; p.bit = 0; @@ -375,6 +376,22 @@ int sw842_decompress(const u8 *in, unsigned int ilen, } } while (op != OP_END); + /* + * crc(0:31) is saved in compressed data starting with the + * next bit after End of stream template. + */ + ret = next_bits(&p, &crc, CRC_BITS); + if (ret) + return ret; + + /* + * Validate CRC saved in compressed data. + */ + if (crc != (u64)crc32_be(0, out, total - p.olen)) { + pr_debug("CRC mismatch for decompression\n"); + return -EINVAL; + } + if (unlikely((total - p.olen) > UINT_MAX)) return -ENOSPC; |