Add scomp backend for zlib-deflate compression algorithm.
This backend outputs data using the format defined in rfc1950
(raw deflate surrounded by zlib header and footer).
Signed-off-by: Giovanni Cabiddu <giovanni.cabiddu@xxxxxxxxx>
---
crypto/deflate.c | 61 ++++++++++++++++++++++++++++++++-------------
crypto/testmgr.c | 10 ++++++++
crypto/testmgr.h | 75 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 129 insertions(+), 17 deletions(-)
diff --git a/crypto/deflate.c b/crypto/deflate.c
index f942cb3..647f2e5 100644
--- a/crypto/deflate.c
+++ b/crypto/deflate.c
@@ -43,20 +43,24 @@ struct deflate_ctx {
struct z_stream_s decomp_stream;
};
-static int deflate_comp_init(struct deflate_ctx *ctx)
+static int deflate_comp_init(struct deflate_ctx *ctx, int format)
{
int ret = 0;
struct z_stream_s *stream = &ctx->comp_stream;
stream->workspace = vzalloc(zlib_deflate_workspacesize(
- -DEFLATE_DEF_WINBITS, DEFLATE_DEF_MEMLEVEL));
+ MAX_WBITS, MAX_MEM_LEVEL));
if (!stream->workspace) {
ret = -ENOMEM;
goto out;
}
- ret = zlib_deflateInit2(stream, DEFLATE_DEF_LEVEL, Z_DEFLATED,
- -DEFLATE_DEF_WINBITS, DEFLATE_DEF_MEMLEVEL,
- Z_DEFAULT_STRATEGY);
+ if (format)
+ ret = zlib_deflateInit(stream, 3);
+ else
+ ret = zlib_deflateInit2(stream, DEFLATE_DEF_LEVEL, Z_DEFLATED,
+ -DEFLATE_DEF_WINBITS,
+ DEFLATE_DEF_MEMLEVEL,
+ Z_DEFAULT_STRATEGY);
if (ret != Z_OK) {
ret = -EINVAL;
goto out_free;
@@ -68,7 +72,7 @@ static int deflate_comp_init(struct deflate_ctx *ctx)
goto out;
}
-static int deflate_decomp_init(struct deflate_ctx *ctx)
+static int deflate_decomp_init(struct deflate_ctx *ctx, int format)
{
int ret = 0;
struct z_stream_s *stream = &ctx->decomp_stream;
@@ -78,7 +82,10 @@ static int deflate_decomp_init(struct deflate_ctx *ctx)
ret = -ENOMEM;
goto out;
}
- ret = zlib_inflateInit2(stream, -DEFLATE_DEF_WINBITS);
+ if (format)
+ ret = zlib_inflateInit(stream);
+ else
+ ret = zlib_inflateInit2(stream, -DEFLATE_DEF_WINBITS);
if (ret != Z_OK) {
ret = -EINVAL;
goto out_free;
@@ -102,21 +109,21 @@ static void deflate_decomp_exit(struct deflate_ctx *ctx)
vfree(ctx->decomp_stream.workspace);
}
-static int __deflate_init(void *ctx)
+static int __deflate_init(void *ctx, int format)
{
int ret;
- ret = deflate_comp_init(ctx);
+ ret = deflate_comp_init(ctx, format);
if (ret)
goto out;
- ret = deflate_decomp_init(ctx);
+ ret = deflate_decomp_init(ctx, format);
if (ret)
deflate_comp_exit(ctx);
out:
return ret;
}
-static void *deflate_alloc_ctx(struct crypto_scomp *tfm)
+static void *gen_deflate_alloc_ctx(struct crypto_scomp *tfm, int format)
{
struct deflate_ctx *ctx;
int ret;
@@ -125,7 +132,7 @@ static void *deflate_alloc_ctx(struct crypto_scomp *tfm)
if (!ctx)
return ERR_PTR(-ENOMEM);
- ret = __deflate_init(ctx);
+ ret = __deflate_init(ctx, format);
if (ret) {
kfree(ctx);
return ERR_PTR(ret);
@@ -134,11 +141,21 @@ static void *deflate_alloc_ctx(struct crypto_scomp *tfm)
return ctx;
}
+static void *deflate_alloc_ctx(struct crypto_scomp *tfm)
+{
+ return gen_deflate_alloc_ctx(tfm, 0);
+}
+
+static void *zlib_deflate_alloc_ctx(struct crypto_scomp *tfm)
+{
+ return gen_deflate_alloc_ctx(tfm, 1);
+}
+
static int deflate_init(struct crypto_tfm *tfm)
{
struct deflate_ctx *ctx = crypto_tfm_ctx(tfm);
- return __deflate_init(ctx);
+ return __deflate_init(ctx, 0);
}
static void __deflate_exit(void *ctx)
@@ -272,7 +289,7 @@ static struct crypto_alg alg = {
.coa_decompress = deflate_decompress } }
};
-static struct scomp_alg scomp = {
+static struct scomp_alg scomp[] = { {
.alloc_ctx = deflate_alloc_ctx,
.free_ctx = deflate_free_ctx,
.compress = deflate_scompress,
@@ -282,7 +299,17 @@ static struct scomp_alg scomp = {
.cra_driver_name = "deflate-scomp",
.cra_module = THIS_MODULE,
}
-};
+}, {
+ .alloc_ctx = zlib_deflate_alloc_ctx,
+ .free_ctx = deflate_free_ctx,
+ .compress = deflate_scompress,
+ .decompress = deflate_sdecompress,
+ .base = {
+ .cra_name = "zlib(deflate)",
+ .cra_driver_name = "deflate-rfc1950-scomp",
+ .cra_module = THIS_MODULE,
+ }
+} };
static int __init deflate_mod_init(void)
{
@@ -292,7 +319,7 @@ static int __init deflate_mod_init(void)
if (ret)
return ret;
- ret = crypto_register_scomp(&scomp);
+ ret = crypto_register_scomps(scomp, ARRAY_SIZE(scomp));
if (ret) {
crypto_unregister_alg(&alg);
return ret;
@@ -304,7 +331,7 @@ static int __init deflate_mod_init(void)
static void __exit deflate_mod_fini(void)
{
crypto_unregister_alg(&alg);
- crypto_unregister_scomp(&scomp);
+ crypto_unregister_scomps(scomp, ARRAY_SIZE(scomp));
}
module_init(deflate_mod_init);
diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index cd075c7..b687cf7 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -3489,6 +3489,16 @@ static const struct alg_test_desc alg_test_descs[] = {
.dec = __VECS(tf_xts_dec_tv_template)
}
}
+ }, {
+ .alg = "zlib(deflate)",
+ .test = alg_test_comp,
+ .fips_allowed = 1,
+ .suite = {
+ .comp = {
+ .comp = __VECS(zlib_deflate_comp_tv_template),
+ .decomp = __VECS(zlib_deflate_decomp_tv_template)
+ }
+ }
}
};
diff --git a/crypto/testmgr.h b/crypto/testmgr.h
index 15c043f..4293573 100644
--- a/crypto/testmgr.h
+++ b/crypto/testmgr.h
@@ -33204,6 +33204,81 @@ static const struct comp_testvec deflate_decomp_tv_template[] = {
},
};
+static const struct comp_testvec zlib_deflate_comp_tv_template[] = {
+ {
+ .inlen = 70,
+ .outlen = 44,
+ .input = "Join us now and share the software "
+ "Join us now and share the software ",
+ .output = "\x78\x5e\xf3\xca\xcf\xcc\x53\x28"
+ "\x2d\x56\xc8\xcb\x2f\x57\x48\xcc"
+ "\x4b\x51\x28\xce\x48\x2c\x4a\x55"
+ "\x28\xc9\x48\x55\x28\xce\x4f\x2b"
+ "\x29\x07\x71\xbc\x08\x2b\x01\x00"
+ "\x7c\x65\x19\x3d",
+ }, {
+ .inlen = 191,
+ .outlen = 129,
+ .input = "This document describes a compression method based on the DEFLATE"
+ "compression algorithm. This document defines the application of "
+ "the DEFLATE algorithm to the IP Payload Compression Protocol.",
+ .output = "\x78\x5e\x5d\xce\x41\x0a\xc3\x30"
+ "\x0c\x04\xc0\xaf\xec\x0b\xf2\x87"
+ "\xd2\xa6\x50\xe8\xc1\x07\x7f\x40"
+ "\xb1\x95\x5a\x60\x5b\xc6\x56\x0f"
+ "\xfd\x7d\x93\x1e\x42\xe8\x51\xec"
+ "\xee\x20\x9f\x64\x20\x6a\x78\x17"
+ "\xae\x86\xc8\x23\x74\x59\x78\x80"
+ "\x10\xb4\xb4\xce\x63\x88\x56\x14"
+ "\xb6\xa4\x11\x0b\x0d\x8e\xd8\x6e"
+ "\x4b\x8c\xdb\x7c\x7f\x5e\xfc\x7c"
+ "\xae\x51\x7e\x69\x17\x4b\x65\x02"
+ "\xfc\x1f\xbc\x4a\xdd\xd8\x7d\x48"
+ "\xad\x65\x09\x64\x3b\xac\xeb\xd9"
+ "\xc2\x01\xc0\xf4\x17\x3c\x1c\x1c"
+ "\x7d\xb2\x52\xc4\xf5\xf4\x8f\xeb"
+ "\x6a\x1a\x34\x4f\x5f\x2e\x32\x45"
+ "\x4e",
+ },
+};
+
+static const struct comp_testvec zlib_deflate_decomp_tv_template[] = {
+ {
+ .inlen = 128,
+ .outlen = 191,
+ .input = "\x78\x9c\x5d\x8d\x31\x0e\xc2\x30"
+ "\x10\x04\xbf\xb2\x2f\xc8\x1f\x10"
+ "\x04\x09\x89\xc2\x85\x3f\x70\xb1"
+ "\x2f\xf8\x24\xdb\x67\xd9\x47\xc1"
+ "\xef\x49\x68\x12\x51\xae\x76\x67"
+ "\xd6\x27\x19\x88\x1a\xde\x85\xab"
+ "\x21\xf2\x08\x5d\x16\x1e\x20\x04"
+ "\x2d\xad\xf3\x18\xa2\x15\x85\x2d"
+ "\x69\xc4\x42\x83\x23\xb6\x6c\x89"
+ "\x71\x9b\xef\xcf\x8b\x9f\xcf\x33"
+ "\xca\x2f\xed\x62\xa9\x4c\x80\xff"
+ "\x13\xaf\x52\x37\xed\x0e\x52\x6b"
+ "\x59\x02\xd9\x4e\xe8\x7a\x76\x1d"
+ "\x02\x98\xfe\x8a\x87\x83\xa3\x4f"
+ "\x56\x8a\xb8\x9e\x8e\x5c\x57\xd3"
+ "\xa0\x79\xfa\x02\x2e\x32\x45\x4e",
+ .output = "This document describes a compression method based on the DEFLATE"
+ "compression algorithm. This document defines the application of "
+ "the DEFLATE algorithm to the IP Payload Compression Protocol.",
+ }, {
+ .inlen = 44,
+ .outlen = 70,
+ .input = "\x78\x9c\xf3\xca\xcf\xcc\x53\x28"
+ "\x2d\x56\xc8\xcb\x2f\x57\x48\xcc"
+ "\x4b\x51\x28\xce\x48\x2c\x4a\x55"
+ "\x28\xc9\x48\x55\x28\xce\x4f\x2b"
+ "\x29\x07\x71\xbc\x08\x2b\x01\x00"
+ "\x7c\x65\x19\x3d",
+ .output = "Join us now and share the software "
+ "Join us now and share the software ",
+ },
+};
+
/*
* LZO test vectors (null-terminated strings).
*/
--
2.9.3
