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| author | nagendra modadugu <ngm@google.com> | 2015-12-08 21:07:54 -0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2016-01-11 22:03:13 -0800 |
| commit | 7a254e9851e37a5473efb8e61059d47b52bcee76 (patch) | |
| tree | f37e151d293b26962f79234b6103d5245e4f4d0b /chip/g/dcrypto/internal.h | |
| parent | 4368dcfb32942740dd11188de6a8658cdd448a5a (diff) | |
| download | chrome-ec-stabilize-7821.B.tar.gz | |
Initial RSA implementation.stabilize-7821.B
Includes support for encrypt / decrypt,
and sign / verify; padding schemes OAEP /
PKCS1; supporting bignum library.
RSA key sizes must be a multiple of 32-bits
(with the top bit set). Keying material,
input and output buffers are required to be
word-aligned.
BRANCH=none
TEST=added encrypt/decrypt sign/verify tests, compatibility with openssl tested
BUG=chrome-os-partner:43025,chrome-os-partner:47524
Change-Id: I6bc324c651e3178bb45bb75ab5935d9bc07efbce
Signed-off-by: nagendra modadugu <ngm@google.com>
Reviewed-on: https://chromium-review.googlesource.com/316942
Commit-Ready: Marius Schilder <mschilder@chromium.org>
Tested-by: Nagendra Modadugu <ngm@google.com>
Reviewed-by: Marius Schilder <mschilder@chromium.org>
Diffstat (limited to 'chip/g/dcrypto/internal.h')
| -rw-r--r-- | chip/g/dcrypto/internal.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/chip/g/dcrypto/internal.h b/chip/g/dcrypto/internal.h index 3be8a406a7..8757ab5e86 100644 --- a/chip/g/dcrypto/internal.h +++ b/chip/g/dcrypto/internal.h @@ -12,6 +12,9 @@ #include "sha1.h" #include "sha256.h" +/* + * SHA. + */ #define CTRL_CTR_BIG_ENDIAN (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) #define CTRL_ENABLE 1 #define CTRL_ENCRYPT 1 @@ -79,4 +82,27 @@ void dcrypto_sha_update(struct HASH_CTX *unused, const uint8_t *data, uint32_t n); void dcrypto_sha_wait(enum sha_mode mode, uint32_t *digest); +/* + * BIGNUM. + */ +#define BN_BITS2 32 +#define BN_BYTES 4 + +struct BIGNUM { + uint32_t dmax; /* Size of d, in 32-bit words. */ + uint32_t *d; /* Word array, little endian format ... */ +}; + +void bn_init(struct BIGNUM *bn, void *buf, size_t len); +#define bn_size(b) ((b)->dmax * BN_BYTES) +int bn_check_topbit(const struct BIGNUM *N); +void bn_mont_modexp(struct BIGNUM *output, const struct BIGNUM *input, + const struct BIGNUM *exp, const struct BIGNUM *N); + +/* + * Utility functions. + */ +/* TODO(ngm): memset that doesn't get optimized out. */ +#define dcrypto_memset(p, b, len) memset((p), (b), (len)) + #endif /* ! __EC_CHIP_G_DCRYPTO_INTERNAL_H */ |