diff options
| author | Stefan Berger <stefanb@linux.ibm.com> | 2021-03-16 17:07:37 -0400 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2021-03-26 19:41:59 +1100 |
| commit | 299f561a66939debba70e6d7c67aa01ed32613d9 (patch) | |
| tree | 490234c55e82ab9c0d1009e1a0db5fd73fb0064f /crypto/asymmetric_keys | |
| parent | d1a303e8616c5ba1260722bb9068bbc0d1704847 (diff) | |
x509: Add support for parsing x509 certs with ECDSA keys
Add support for parsing of x509 certificates that contain ECDSA keys,
such as NIST P256, that have been signed by a CA using any of the
current SHA hash algorithms.
Cc: David Howells <dhowells@redhat.com>
Cc: keyrings@vger.kernel.org
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/asymmetric_keys')
| -rw-r--r-- | crypto/asymmetric_keys/public_key.c | 4 | ||||
| -rw-r--r-- | crypto/asymmetric_keys/x509_cert_parser.c | 34 | ||||
| -rw-r--r-- | crypto/asymmetric_keys/x509_public_key.c | 4 |
3 files changed, 39 insertions, 3 deletions
diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c index 788a4ba1e2e7..4fefb219bfdc 100644 --- a/crypto/asymmetric_keys/public_key.c +++ b/crypto/asymmetric_keys/public_key.c @@ -14,6 +14,7 @@ #include <linux/slab.h> #include <linux/seq_file.h> #include <linux/scatterlist.h> +#include <linux/asn1.h> #include <keys/asymmetric-subtype.h> #include <crypto/public_key.h> #include <crypto/akcipher.h> @@ -85,7 +86,8 @@ int software_key_determine_akcipher(const char *encoding, return n >= CRYPTO_MAX_ALG_NAME ? -EINVAL : 0; } - if (strcmp(encoding, "raw") == 0) { + if (strcmp(encoding, "raw") == 0 || + strcmp(encoding, "x962") == 0) { strcpy(alg_name, pkey->pkey_algo); return 0; } diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c index 1621ceaf5c95..f5d547c6dfb5 100644 --- a/crypto/asymmetric_keys/x509_cert_parser.c +++ b/crypto/asymmetric_keys/x509_cert_parser.c @@ -227,6 +227,26 @@ int x509_note_pkey_algo(void *context, size_t hdrlen, ctx->cert->sig->hash_algo = "sha224"; goto rsa_pkcs1; + case OID_id_ecdsa_with_sha1: + ctx->cert->sig->hash_algo = "sha1"; + goto ecdsa; + + case OID_id_ecdsa_with_sha224: + ctx->cert->sig->hash_algo = "sha224"; + goto ecdsa; + + case OID_id_ecdsa_with_sha256: + ctx->cert->sig->hash_algo = "sha256"; + goto ecdsa; + + case OID_id_ecdsa_with_sha384: + ctx->cert->sig->hash_algo = "sha384"; + goto ecdsa; + + case OID_id_ecdsa_with_sha512: + ctx->cert->sig->hash_algo = "sha512"; + goto ecdsa; + case OID_gost2012Signature256: ctx->cert->sig->hash_algo = "streebog256"; goto ecrdsa; @@ -255,6 +275,11 @@ sm2: ctx->cert->sig->encoding = "raw"; ctx->algo_oid = ctx->last_oid; return 0; +ecdsa: + ctx->cert->sig->pkey_algo = "ecdsa"; + ctx->cert->sig->encoding = "x962"; + ctx->algo_oid = ctx->last_oid; + return 0; } /* @@ -276,7 +301,8 @@ int x509_note_signature(void *context, size_t hdrlen, if (strcmp(ctx->cert->sig->pkey_algo, "rsa") == 0 || strcmp(ctx->cert->sig->pkey_algo, "ecrdsa") == 0 || - strcmp(ctx->cert->sig->pkey_algo, "sm2") == 0) { + strcmp(ctx->cert->sig->pkey_algo, "sm2") == 0 || + strcmp(ctx->cert->sig->pkey_algo, "ecdsa") == 0) { /* Discard the BIT STRING metadata */ if (vlen < 1 || *(const u8 *)value != 0) return -EBADMSG; @@ -478,6 +504,12 @@ int x509_extract_key_data(void *context, size_t hdrlen, case OID_sm2: ctx->cert->pub->pkey_algo = "sm2"; break; + case OID_id_prime192v1: + ctx->cert->pub->pkey_algo = "ecdsa-nist-p192"; + break; + case OID_id_prime256v1: + ctx->cert->pub->pkey_algo = "ecdsa-nist-p256"; + break; default: return -ENOPKG; } diff --git a/crypto/asymmetric_keys/x509_public_key.c b/crypto/asymmetric_keys/x509_public_key.c index ae450eb8be14..3d45161b271a 100644 --- a/crypto/asymmetric_keys/x509_public_key.c +++ b/crypto/asymmetric_keys/x509_public_key.c @@ -129,7 +129,9 @@ int x509_check_for_self_signed(struct x509_certificate *cert) } ret = -EKEYREJECTED; - if (strcmp(cert->pub->pkey_algo, cert->sig->pkey_algo) != 0) + if (strcmp(cert->pub->pkey_algo, cert->sig->pkey_algo) != 0 && + (strncmp(cert->pub->pkey_algo, "ecdsa-", 6) != 0 || + strcmp(cert->sig->pkey_algo, "ecdsa") != 0)) goto out; ret = public_key_verify_signature(cert->pub, cert->sig); |