crypto: scomp - add support for deflate rfc1950 (zlib)
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@intel.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Giovanni Cabiddu
Herbert Xu
parent
3de4f5e1a5
commit
a368f43d6e
3 changed files with 129 additions and 17 deletions
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@ -43,20 +43,24 @@ struct deflate_ctx {
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struct z_stream_s decomp_stream;
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};
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static int deflate_comp_init(struct deflate_ctx *ctx)
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static int deflate_comp_init(struct deflate_ctx *ctx, int format)
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{
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int ret = 0;
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struct z_stream_s *stream = &ctx->comp_stream;
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stream->workspace = vzalloc(zlib_deflate_workspacesize(
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-DEFLATE_DEF_WINBITS, DEFLATE_DEF_MEMLEVEL));
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MAX_WBITS, MAX_MEM_LEVEL));
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if (!stream->workspace) {
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ret = -ENOMEM;
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goto out;
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}
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ret = zlib_deflateInit2(stream, DEFLATE_DEF_LEVEL, Z_DEFLATED,
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-DEFLATE_DEF_WINBITS, DEFLATE_DEF_MEMLEVEL,
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Z_DEFAULT_STRATEGY);
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if (format)
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ret = zlib_deflateInit(stream, 3);
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else
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ret = zlib_deflateInit2(stream, DEFLATE_DEF_LEVEL, Z_DEFLATED,
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-DEFLATE_DEF_WINBITS,
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DEFLATE_DEF_MEMLEVEL,
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Z_DEFAULT_STRATEGY);
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if (ret != Z_OK) {
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ret = -EINVAL;
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goto out_free;
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@ -68,7 +72,7 @@ static int deflate_comp_init(struct deflate_ctx *ctx)
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goto out;
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}
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static int deflate_decomp_init(struct deflate_ctx *ctx)
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static int deflate_decomp_init(struct deflate_ctx *ctx, int format)
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{
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int ret = 0;
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struct z_stream_s *stream = &ctx->decomp_stream;
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@ -78,7 +82,10 @@ static int deflate_decomp_init(struct deflate_ctx *ctx)
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ret = -ENOMEM;
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goto out;
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}
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ret = zlib_inflateInit2(stream, -DEFLATE_DEF_WINBITS);
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if (format)
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ret = zlib_inflateInit(stream);
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else
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ret = zlib_inflateInit2(stream, -DEFLATE_DEF_WINBITS);
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if (ret != Z_OK) {
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ret = -EINVAL;
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goto out_free;
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@ -102,21 +109,21 @@ static void deflate_decomp_exit(struct deflate_ctx *ctx)
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vfree(ctx->decomp_stream.workspace);
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}
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static int __deflate_init(void *ctx)
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static int __deflate_init(void *ctx, int format)
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{
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int ret;
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ret = deflate_comp_init(ctx);
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ret = deflate_comp_init(ctx, format);
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if (ret)
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goto out;
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ret = deflate_decomp_init(ctx);
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ret = deflate_decomp_init(ctx, format);
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if (ret)
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deflate_comp_exit(ctx);
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out:
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return ret;
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}
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static void *deflate_alloc_ctx(struct crypto_scomp *tfm)
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static void *gen_deflate_alloc_ctx(struct crypto_scomp *tfm, int format)
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{
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struct deflate_ctx *ctx;
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int ret;
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@ -125,7 +132,7 @@ static void *deflate_alloc_ctx(struct crypto_scomp *tfm)
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if (!ctx)
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return ERR_PTR(-ENOMEM);
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ret = __deflate_init(ctx);
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ret = __deflate_init(ctx, format);
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if (ret) {
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kfree(ctx);
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return ERR_PTR(ret);
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@ -134,11 +141,21 @@ static void *deflate_alloc_ctx(struct crypto_scomp *tfm)
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return ctx;
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}
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static void *deflate_alloc_ctx(struct crypto_scomp *tfm)
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{
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return gen_deflate_alloc_ctx(tfm, 0);
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}
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static void *zlib_deflate_alloc_ctx(struct crypto_scomp *tfm)
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{
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return gen_deflate_alloc_ctx(tfm, 1);
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}
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static int deflate_init(struct crypto_tfm *tfm)
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{
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struct deflate_ctx *ctx = crypto_tfm_ctx(tfm);
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return __deflate_init(ctx);
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return __deflate_init(ctx, 0);
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}
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static void __deflate_exit(void *ctx)
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@ -272,7 +289,7 @@ static struct crypto_alg alg = {
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.coa_decompress = deflate_decompress } }
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};
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static struct scomp_alg scomp = {
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static struct scomp_alg scomp[] = { {
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.alloc_ctx = deflate_alloc_ctx,
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.free_ctx = deflate_free_ctx,
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.compress = deflate_scompress,
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@ -282,7 +299,17 @@ static struct scomp_alg scomp = {
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.cra_driver_name = "deflate-scomp",
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.cra_module = THIS_MODULE,
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}
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};
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}, {
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.alloc_ctx = zlib_deflate_alloc_ctx,
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.free_ctx = deflate_free_ctx,
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.compress = deflate_scompress,
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.decompress = deflate_sdecompress,
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.base = {
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.cra_name = "zlib-deflate",
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.cra_driver_name = "zlib-deflate-scomp",
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.cra_module = THIS_MODULE,
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}
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} };
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static int __init deflate_mod_init(void)
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{
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@ -292,7 +319,7 @@ static int __init deflate_mod_init(void)
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if (ret)
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return ret;
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ret = crypto_register_scomp(&scomp);
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ret = crypto_register_scomps(scomp, ARRAY_SIZE(scomp));
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if (ret) {
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crypto_unregister_alg(&alg);
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return ret;
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@ -304,7 +331,7 @@ static int __init deflate_mod_init(void)
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static void __exit deflate_mod_fini(void)
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{
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crypto_unregister_alg(&alg);
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crypto_unregister_scomp(&scomp);
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crypto_unregister_scomps(scomp, ARRAY_SIZE(scomp));
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}
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module_init(deflate_mod_init);
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@ -3513,6 +3513,16 @@ static const struct alg_test_desc alg_test_descs[] = {
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.dec = __VECS(tf_xts_dec_tv_template)
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}
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}
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}, {
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.alg = "zlib-deflate",
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.test = alg_test_comp,
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.fips_allowed = 1,
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.suite = {
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.comp = {
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.comp = __VECS(zlib_deflate_comp_tv_template),
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.decomp = __VECS(zlib_deflate_decomp_tv_template)
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}
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}
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}
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};
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@ -33204,6 +33204,81 @@ static const struct comp_testvec deflate_decomp_tv_template[] = {
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},
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};
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static const struct comp_testvec zlib_deflate_comp_tv_template[] = {
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{
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.inlen = 70,
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.outlen = 44,
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.input = "Join us now and share the software "
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"Join us now and share the software ",
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.output = "\x78\x5e\xf3\xca\xcf\xcc\x53\x28"
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"\x2d\x56\xc8\xcb\x2f\x57\x48\xcc"
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"\x4b\x51\x28\xce\x48\x2c\x4a\x55"
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"\x28\xc9\x48\x55\x28\xce\x4f\x2b"
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"\x29\x07\x71\xbc\x08\x2b\x01\x00"
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"\x7c\x65\x19\x3d",
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}, {
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.inlen = 191,
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.outlen = 129,
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.input = "This document describes a compression method based on the DEFLATE"
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"compression algorithm. This document defines the application of "
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"the DEFLATE algorithm to the IP Payload Compression Protocol.",
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.output = "\x78\x5e\x5d\xce\x41\x0a\xc3\x30"
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"\x0c\x04\xc0\xaf\xec\x0b\xf2\x87"
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"\xd2\xa6\x50\xe8\xc1\x07\x7f\x40"
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"\xb1\x95\x5a\x60\x5b\xc6\x56\x0f"
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"\xfd\x7d\x93\x1e\x42\xe8\x51\xec"
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"\xee\x20\x9f\x64\x20\x6a\x78\x17"
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"\xae\x86\xc8\x23\x74\x59\x78\x80"
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"\x10\xb4\xb4\xce\x63\x88\x56\x14"
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"\xb6\xa4\x11\x0b\x0d\x8e\xd8\x6e"
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"\x4b\x8c\xdb\x7c\x7f\x5e\xfc\x7c"
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"\xae\x51\x7e\x69\x17\x4b\x65\x02"
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"\xfc\x1f\xbc\x4a\xdd\xd8\x7d\x48"
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"\xad\x65\x09\x64\x3b\xac\xeb\xd9"
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"\xc2\x01\xc0\xf4\x17\x3c\x1c\x1c"
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"\x7d\xb2\x52\xc4\xf5\xf4\x8f\xeb"
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"\x6a\x1a\x34\x4f\x5f\x2e\x32\x45"
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"\x4e",
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},
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};
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static const struct comp_testvec zlib_deflate_decomp_tv_template[] = {
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{
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.inlen = 128,
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.outlen = 191,
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.input = "\x78\x9c\x5d\x8d\x31\x0e\xc2\x30"
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"\x10\x04\xbf\xb2\x2f\xc8\x1f\x10"
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"\x04\x09\x89\xc2\x85\x3f\x70\xb1"
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"\x2f\xf8\x24\xdb\x67\xd9\x47\xc1"
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"\xef\x49\x68\x12\x51\xae\x76\x67"
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"\xd6\x27\x19\x88\x1a\xde\x85\xab"
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"\x21\xf2\x08\x5d\x16\x1e\x20\x04"
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"\x2d\xad\xf3\x18\xa2\x15\x85\x2d"
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"\x69\xc4\x42\x83\x23\xb6\x6c\x89"
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"\x71\x9b\xef\xcf\x8b\x9f\xcf\x33"
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"\xca\x2f\xed\x62\xa9\x4c\x80\xff"
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"\x13\xaf\x52\x37\xed\x0e\x52\x6b"
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"\x59\x02\xd9\x4e\xe8\x7a\x76\x1d"
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"\x02\x98\xfe\x8a\x87\x83\xa3\x4f"
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"\x56\x8a\xb8\x9e\x8e\x5c\x57\xd3"
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"\xa0\x79\xfa\x02\x2e\x32\x45\x4e",
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.output = "This document describes a compression method based on the DEFLATE"
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"compression algorithm. This document defines the application of "
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"the DEFLATE algorithm to the IP Payload Compression Protocol.",
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}, {
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.inlen = 44,
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.outlen = 70,
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.input = "\x78\x9c\xf3\xca\xcf\xcc\x53\x28"
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"\x2d\x56\xc8\xcb\x2f\x57\x48\xcc"
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"\x4b\x51\x28\xce\x48\x2c\x4a\x55"
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"\x28\xc9\x48\x55\x28\xce\x4f\x2b"
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"\x29\x07\x71\xbc\x08\x2b\x01\x00"
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"\x7c\x65\x19\x3d",
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.output = "Join us now and share the software "
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"Join us now and share the software ",
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},
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};
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/*
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* LZO test vectors (null-terminated strings).
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*/
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