Add ShangMi (SM2/SM3/SM4/SM9) algorithm families (#812)

Fixes #811

Adds SM2/SM3/SM4/SM9 algorithm families to the CycloneDX cryptography
registry and updates algorithmFamiliesEnum accordingly.

Note: some official ShangMi specification mirrors appear region-blocked
or unreliable from multiple locations.
To avoid fragile links in the registry, this PR relies on globally
accessible references (RFC Editor + ISO)

Author: stevespringett

schema/cryptography-defs.json

@@ -862,6 +862,90 @@
         }
       ]
     },
+    {
+      "family": "SM2",
+      "standard": [
+        {
+          "name": "RFC8998",
+          "url": "https://www.rfc-editor.org/rfc/rfc8998.html"
+        }
+      ],
+      "variant": [
+        {
+          "pattern": "SM2[-256]",
+          "primitive": "signature"
+        },
+        {
+          "pattern": "SM2-(ENC|ENCRYPTION)[-256]",
+          "primitive": "pke"
+        },
+        {
+          "pattern": "SM2-(KEX|KEYEXCHANGE|KEY-EXCHANGE|KEYAGREE|KEY-AGREE|KEYAGREEMENT|KEY-AGREEMENT)[-256]",
+          "primitive": "key-agree"
+        }
+      ]
+    },
+    {
+      "family": "SM3",
+      "standard": [
+        {
+          "name": "RFC8998",
+          "url": "https://www.rfc-editor.org/rfc/rfc8998.html"
+        }
+      ],
+      "variant": [
+        {
+          "pattern": "SM3",
+          "primitive": "hash"
+        }
+      ]
+    },
+    {
+      "family": "SM4",
+      "standard": [
+        {
+          "name": "ISO/IEC18033-3:2010/Amd1:2021",
+          "url": "https://www.iso.org/standard/81564.html"
+        }
+      ],
+      "variant": [
+        {
+          "pattern": "SM4[-(ECB|CBC|CFB|OFB|CTR|XTS)][-{padding}][-{ivlen}]",
+          "primitive": "block-cipher"
+        },
+        {
+          "pattern": "SM4-(GCM|CCM)[-{tagLength}][-{ivLength}]",
+          "primitive": "ae"
+        }
+      ]
+    },
+    {
+      "family": "SM9",
+      "standard": [
+        {
+          "name": "GM/T0044.1-2016",
+          "url": "https://www.gmbz.org.cn/upload/2025-01-23/1737625691994053970.pdf"
+        }
+      ],
+      "variant": [
+        {
+          "pattern": "SM9-(SIG|SIGNATURE)",
+          "primitive": "signature"
+        },
+        {
+          "pattern": "SM9-(KEX|KEYEXCHANGE|KEY-EXCHANGE|KEYAGREE|KEYAGREEMENT|KEY-AGREE|KEY-AGREEMENT)",
+          "primitive": "key-agree"
+        },
+        {
+          "pattern": "SM9-(KEM|KEYENCAPSULATION|KEY-ENCAPSULATION)",
+          "primitive": "kem"
+        },
+        {
+          "pattern": "SM9-(ENC|ENCRYPTION|PKE|PUBLICKEY-ENCRYPTION|PUBLIC-KEY-ENCRYPTION)",
+          "primitive": "pke"
+        }
+      ]
+    },
     {
       "family": "SEED",
       "standard": [

schema/cryptography-defs.schema.json

@@ -312,6 +312,10 @@
         "SHA-2",
         "SHA-3",
         "SLH-DSA",
+        "SM2",
+        "SM3",
+        "SM4",
+        "SM9",
         "SNOW3G",
         "SP800-108",
         "Salsa20",
@@ -581,4 +585,4 @@
       ]
     }
   }
-}
+}