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| author | Tianjia Zhang <tianjia.zhang@linux.alibaba.com> | 2020-09-21 00:21:02 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-09-25 17:48:55 +1000 |
| commit | 215525639631ade1d67e879fe2c3d7195daa9f59 (patch) | |
| tree | ad4213b7dc01f16c174f476db2c5899d8a49106d /include/crypto | |
| parent | 254f84f559039b6d6f6e1035fd7645b42671ab48 (diff) | |
| download | lwn-215525639631ade1d67e879fe2c3d7195daa9f59.tar.gz lwn-215525639631ade1d67e879fe2c3d7195daa9f59.zip | |
X.509: support OSCCA SM2-with-SM3 certificate verification
The digital certificate format based on SM2 crypto algorithm as
specified in GM/T 0015-2012. It was published by State Encryption
Management Bureau, China.
The method of generating Other User Information is defined as
ZA=H256(ENTLA || IDA || a || b || xG || yG || xA || yA), it also
specified in https://tools.ietf.org/html/draft-shen-sm2-ecdsa-02.
The x509 certificate supports SM2-with-SM3 type certificate
verification. Because certificate verification requires ZA
in addition to tbs data, ZA also depends on elliptic curve
parameters and public key data, so you need to access tbs in sig
and calculate ZA. Finally calculate the digest of the
signature and complete the verification work. The calculation
process of ZA is declared in specifications GM/T 0009-2012
and GM/T 0003.2-2012.
Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Tested-by: Xufeng Zhang <yunbo.xufeng@linux.alibaba.com>
Reviewed-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'include/crypto')
| -rw-r--r-- | include/crypto/public_key.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/crypto/public_key.h b/include/crypto/public_key.h index 11f535cfb810..02a6dbe5c366 100644 --- a/include/crypto/public_key.h +++ b/include/crypto/public_key.h @@ -12,6 +12,7 @@ #include <linux/keyctl.h> #include <linux/oid_registry.h> +#include <crypto/akcipher.h> /* * Cryptographic data for the public-key subtype of the asymmetric key type. @@ -44,6 +45,8 @@ struct public_key_signature { const char *pkey_algo; const char *hash_algo; const char *encoding; + const void *data; + unsigned int data_size; }; extern void public_key_signature_free(struct public_key_signature *sig); @@ -81,4 +84,16 @@ extern int verify_signature(const struct key *, int public_key_verify_signature(const struct public_key *pkey, const struct public_key_signature *sig); +#if IS_REACHABLE(CONFIG_CRYPTO_SM2) +int cert_sig_digest_update(const struct public_key_signature *sig, + struct crypto_akcipher *tfm_pkey); +#else +static inline +int cert_sig_digest_update(const struct public_key_signature *sig, + struct crypto_akcipher *tfm_pkey) +{ + return -ENOTSUPP; +} +#endif + #endif /* _LINUX_PUBLIC_KEY_H */ |