diff options
Diffstat (limited to 'crypto/testmgr.c')
| -rw-r--r-- | crypto/testmgr.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/crypto/testmgr.c b/crypto/testmgr.c index 99f84160cb1d..ca3fd5f0c094 100644 --- a/crypto/testmgr.c +++ b/crypto/testmgr.c @@ -28,6 +28,7 @@ #include <linux/fips.h> #include <linux/module.h> #include <linux/once.h> +#include <linux/random.h> #include <linux/scatterlist.h> #include <linux/slab.h> #include <linux/string.h> @@ -603,6 +604,122 @@ static int build_cipher_test_sglists(struct cipher_test_sglists *tsgls, alignmask, dst_total_len, NULL, NULL); } +#ifdef CONFIG_CRYPTO_MANAGER_EXTRA_TESTS +static char *generate_random_sgl_divisions(struct test_sg_division *divs, + size_t max_divs, char *p, char *end, + bool gen_flushes) +{ + struct test_sg_division *div = divs; + unsigned int remaining = TEST_SG_TOTAL; + + do { + unsigned int this_len; + + if (div == &divs[max_divs - 1] || prandom_u32() % 2 == 0) + this_len = remaining; + else + this_len = 1 + (prandom_u32() % remaining); + div->proportion_of_total = this_len; + + if (prandom_u32() % 4 == 0) + div->offset = (PAGE_SIZE - 128) + (prandom_u32() % 128); + else if (prandom_u32() % 2 == 0) + div->offset = prandom_u32() % 32; + else + div->offset = prandom_u32() % PAGE_SIZE; + if (prandom_u32() % 8 == 0) + div->offset_relative_to_alignmask = true; + + div->flush_type = FLUSH_TYPE_NONE; + if (gen_flushes) { + switch (prandom_u32() % 4) { + case 0: + div->flush_type = FLUSH_TYPE_REIMPORT; + break; + case 1: + div->flush_type = FLUSH_TYPE_FLUSH; + break; + } + } + + BUILD_BUG_ON(TEST_SG_TOTAL != 10000); /* for "%u.%u%%" */ + p += scnprintf(p, end - p, "%s%u.%u%%@%s+%u%s", + div->flush_type == FLUSH_TYPE_NONE ? "" : + div->flush_type == FLUSH_TYPE_FLUSH ? + "<flush> " : "<reimport> ", + this_len / 100, this_len % 100, + div->offset_relative_to_alignmask ? + "alignmask" : "", + div->offset, this_len == remaining ? "" : ", "); + remaining -= this_len; + div++; + } while (remaining); + + return p; +} + +/* Generate a random testvec_config for fuzz testing */ +static void generate_random_testvec_config(struct testvec_config *cfg, + char *name, size_t max_namelen) +{ + char *p = name; + char * const end = name + max_namelen; + + memset(cfg, 0, sizeof(*cfg)); + + cfg->name = name; + + p += scnprintf(p, end - p, "random:"); + + if (prandom_u32() % 2 == 0) { + cfg->inplace = true; + p += scnprintf(p, end - p, " inplace"); + } + + if (prandom_u32() % 2 == 0) { + cfg->req_flags |= CRYPTO_TFM_REQ_MAY_SLEEP; + p += scnprintf(p, end - p, " may_sleep"); + } + + switch (prandom_u32() % 4) { + case 0: + cfg->finalization_type = FINALIZATION_TYPE_FINAL; + p += scnprintf(p, end - p, " use_final"); + break; + case 1: + cfg->finalization_type = FINALIZATION_TYPE_FINUP; + p += scnprintf(p, end - p, " use_finup"); + break; + default: + cfg->finalization_type = FINALIZATION_TYPE_DIGEST; + p += scnprintf(p, end - p, " use_digest"); + break; + } + + p += scnprintf(p, end - p, " src_divs=["); + p = generate_random_sgl_divisions(cfg->src_divs, + ARRAY_SIZE(cfg->src_divs), p, end, + (cfg->finalization_type != + FINALIZATION_TYPE_DIGEST)); + p += scnprintf(p, end - p, "]"); + + if (!cfg->inplace && prandom_u32() % 2 == 0) { + p += scnprintf(p, end - p, " dst_divs=["); + p = generate_random_sgl_divisions(cfg->dst_divs, + ARRAY_SIZE(cfg->dst_divs), + p, end, false); + p += scnprintf(p, end - p, "]"); + } + + if (prandom_u32() % 2 == 0) { + cfg->iv_offset = 1 + (prandom_u32() % MAX_ALGAPI_ALIGNMASK); + p += scnprintf(p, end - p, " iv_offset=%u", cfg->iv_offset); + } + + WARN_ON_ONCE(!valid_testvec_config(cfg)); +} +#endif /* CONFIG_CRYPTO_MANAGER_EXTRA_TESTS */ + static int ahash_guard_result(char *result, char c, int size) { int i; |