From: Stefan Berger <stef...@linux.ibm.com> This patch adds 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.
Signed-off-by: Stefan Berger <stef...@linux.ibm.com> Cc: David Howells <dhowe...@redhat.com> Cc: keyri...@vger.kernel.org --- crypto/asymmetric_keys/public_key.c | 17 ++++++++++++ crypto/asymmetric_keys/x509_cert_parser.c | 32 ++++++++++++++++++++++- include/linux/oid_registry.h | 6 +++++ 3 files changed, 54 insertions(+), 1 deletion(-) diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c index 8892908ad58c..cc5d59d2b35d 100644 --- a/crypto/asymmetric_keys/public_key.c +++ b/crypto/asymmetric_keys/public_key.c @@ -90,6 +90,23 @@ int software_key_determine_akcipher(const char *encoding, return 0; } + if (strcmp(encoding, "x962") == 0) { + enum OID oid; + + if (pkey->paramlen < 2) + return -EINVAL; + + oid = look_up_OID(pkey->params + 2, pkey->paramlen - 2); + switch (oid) { + case OID_id_prime192v1: + case OID_id_prime256v1: + strcpy(alg_name, "ecdsa"); + return 0; + default: + return -EINVAL; + } + } + return -ENOPKG; } diff --git a/crypto/asymmetric_keys/x509_cert_parser.c b/crypto/asymmetric_keys/x509_cert_parser.c index 4643fe5ed69a..5ff891f8235d 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 @@ int x509_note_pkey_algo(void *context, size_t hdrlen, 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; @@ -479,6 +505,10 @@ int x509_extract_key_data(void *context, size_t hdrlen, case OID_sm2: ctx->cert->pub->pkey_algo = "sm2"; break; + case OID_id_prime192v1: + case OID_id_prime256v1: + ctx->cert->pub->pkey_algo = "ecdsa"; + break; default: return -ENOPKG; } diff --git a/include/linux/oid_registry.h b/include/linux/oid_registry.h index 4462ed2c18cd..e8071133d0e2 100644 --- a/include/linux/oid_registry.h +++ b/include/linux/oid_registry.h @@ -21,6 +21,12 @@ enum OID { OID_id_dsa, /* 1.2.840.10040.4.1 */ OID_id_ecdsa_with_sha1, /* 1.2.840.10045.4.1 */ OID_id_ecPublicKey, /* 1.2.840.10045.2.1 */ + OID_id_prime192v1, /* 1.2.840.10045.3.1.1 */ + OID_id_prime256v1, /* 1.2.840.10045.3.1.7 */ + OID_id_ecdsa_with_sha224, /* 1.2.840.10045.4.3.1 */ + OID_id_ecdsa_with_sha256, /* 1.2.840.10045.4.3.2 */ + OID_id_ecdsa_with_sha384, /* 1.2.840.10045.4.3.3 */ + OID_id_ecdsa_with_sha512, /* 1.2.840.10045.4.3.4 */ /* PKCS#1 {iso(1) member-body(2) us(840) rsadsi(113549) pkcs(1) pkcs-1(1)} */ OID_rsaEncryption, /* 1.2.840.113549.1.1.1 */ -- 2.26.2