From b37b46f042ccfcfb97a9ef8b8a568812640a2a70 Mon Sep 17 00:00:00 2001 From: Ruchika Gupta Date: Fri, 23 Jan 2015 16:01:59 +0530 Subject: [PATCH] rsa: Use checksum algorithms from struct hash_algo Currently the hash functions used in RSA are called directly from the sha1 and sha256 libraries. Change the RSA checksum library to use the progressive hash API's registered with struct hash_algo. This will allow the checksum library to use the hardware accelerated progressive hash API's once available. Signed-off-by: Ruchika Gupta CC: Simon Glass Acked-by: Simon Glass Signed-off-by: Simon Glass (Fixed build error in am335x_boneblack_vboot due to duplicate CONFIG_DM) Change-Id: Ic44279432f88d4e8594c6e94feb1cfcae2443a54 --- common/image-sig.c | 6 ++--- include/configs/ti_am335x_common.h | 2 ++ include/image.h | 5 ++-- include/u-boot/rsa-checksum.h | 17 ++++++++++--- lib/rsa/rsa-checksum.c | 50 +++++++++++++++++++++++--------------- lib/rsa/rsa-verify.c | 7 +++++- 6 files changed, 57 insertions(+), 30 deletions(-) diff --git a/common/image-sig.c b/common/image-sig.c index 8601eda..2c9f0cd 100644 --- a/common/image-sig.c +++ b/common/image-sig.c @@ -38,7 +38,7 @@ struct checksum_algo checksum_algos[] = { #if IMAGE_ENABLE_SIGN EVP_sha1, #endif - sha1_calculate, + hash_calculate, padding_sha1_rsa2048, }, { @@ -48,7 +48,7 @@ struct checksum_algo checksum_algos[] = { #if IMAGE_ENABLE_SIGN EVP_sha256, #endif - sha256_calculate, + hash_calculate, padding_sha256_rsa2048, }, { @@ -58,7 +58,7 @@ struct checksum_algo checksum_algos[] = { #if IMAGE_ENABLE_SIGN EVP_sha256, #endif - sha256_calculate, + hash_calculate, padding_sha256_rsa4096, } diff --git a/include/configs/ti_am335x_common.h b/include/configs/ti_am335x_common.h index 5ed86d9..598526b 100644 --- a/include/configs/ti_am335x_common.h +++ b/include/configs/ti_am335x_common.h @@ -20,7 +20,9 @@ #define CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC #ifndef CONFIG_SPL_BUILD +#ifndef CONFIG_DM # define CONFIG_DM +#endif # define CONFIG_CMD_DM # define CONFIG_DM_GPIO # define CONFIG_DM_SERIAL diff --git a/include/image.h b/include/image.h index ee3afe3..dcbc72f 100644 --- a/include/image.h +++ b/include/image.h @@ -927,8 +927,9 @@ struct checksum_algo { #if IMAGE_ENABLE_SIGN const EVP_MD *(*calculate_sign)(void); #endif - void (*calculate)(const struct image_region region[], - int region_count, uint8_t *checksum); + int (*calculate)(const char *name, + const struct image_region region[], + int region_count, uint8_t *checksum); const uint8_t *rsa_padding; }; diff --git a/include/u-boot/rsa-checksum.h b/include/u-boot/rsa-checksum.h index c996fb3..3c69d85 100644 --- a/include/u-boot/rsa-checksum.h +++ b/include/u-boot/rsa-checksum.h @@ -16,9 +16,18 @@ extern const uint8_t padding_sha256_rsa4096[]; extern const uint8_t padding_sha256_rsa2048[]; extern const uint8_t padding_sha1_rsa2048[]; -void sha256_calculate(const struct image_region region[], int region_count, - uint8_t *checksum); -void sha1_calculate(const struct image_region region[], int region_count, - uint8_t *checksum); +/** + * hash_calculate() - Calculate hash over the data + * + * @name: Name of algorithm to be used for hash calculation + * @region: Array having info of regions over which hash needs to be calculated + * @region_count: Number of regions in the region array + * @checksum: Buffer contanining the output hash + * + * @return 0 if OK, < 0 if error + */ +int hash_calculate(const char *name, + const struct image_region region[], int region_count, + uint8_t *checksum); #endif diff --git a/lib/rsa/rsa-checksum.c b/lib/rsa/rsa-checksum.c index 8d8b59f..68d9d65 100644 --- a/lib/rsa/rsa-checksum.c +++ b/lib/rsa/rsa-checksum.c @@ -10,12 +10,13 @@ #include #include #include +#include #else #include "fdt_host.h" -#endif -#include #include #include +#endif +#include /* PKCS 1.5 paddings as described in the RSA PKCS#1 v2.1 standard. */ @@ -136,28 +137,37 @@ const uint8_t padding_sha256_rsa4096[RSA4096_BYTES - SHA256_SUM_LEN] = { 0x03, 0x04, 0x02, 0x01, 0x05, 0x00, 0x04, 0x20 }; -void sha1_calculate(const struct image_region region[], int region_count, - uint8_t *checksum) +int hash_calculate(const char *name, + const struct image_region region[], + int region_count, uint8_t *checksum) { - sha1_context ctx; + struct hash_algo *algo; + int ret = 0; + void *ctx; uint32_t i; i = 0; - sha1_starts(&ctx); - for (i = 0; i < region_count; i++) - sha1_update(&ctx, region[i].data, region[i].size); - sha1_finish(&ctx, checksum); -} + ret = hash_progressive_lookup_algo(name, &algo); + if (ret) + return ret; -void sha256_calculate(const struct image_region region[], int region_count, - uint8_t *checksum) -{ - sha256_context ctx; - uint32_t i; - i = 0; + ret = algo->hash_init(algo, &ctx); + if (ret) + return ret; + + for (i = 0; i < region_count - 1; i++) { + ret = algo->hash_update(algo, ctx, region[i].data, + region[i].size, 0); + if (ret) + return ret; + } + + ret = algo->hash_update(algo, ctx, region[i].data, region[i].size, 1); + if (ret) + return ret; + ret = algo->hash_finish(algo, ctx, checksum, algo->digest_size); + if (ret) + return ret; - sha256_starts(&ctx); - for (i = 0; i < region_count; i++) - sha256_update(&ctx, region[i].data, region[i].size); - sha256_finish(&ctx, checksum); + return 0; } diff --git a/lib/rsa/rsa-verify.c b/lib/rsa/rsa-verify.c index da45daf..60126d2 100644 --- a/lib/rsa/rsa-verify.c +++ b/lib/rsa/rsa-verify.c @@ -184,7 +184,12 @@ int rsa_verify(struct image_sign_info *info, } /* Calculate checksum with checksum-algorithm */ - info->algo->checksum->calculate(region, region_count, hash); + ret = info->algo->checksum->calculate(info->algo->checksum->name, + region, region_count, hash); + if (ret < 0) { + debug("%s: Error in checksum calculation\n", __func__); + return -EINVAL; + } /* See if we must use a particular key */ if (info->required_keynode != -1) {