{"id":26578,"url":"https://patchwork.libcamera.org/api/patches/26578/?format=json","web_url":"https://patchwork.libcamera.org/patch/26578/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260422044736.24717-2-hpa@redhat.com>","date":"2026-04-22T04:47:33","name":"[v2,1/4] libcamera: pub_key: Add ML-DSA-65 signature algorithm for PQC compliance","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"9801284c54f11d158093a69134dc63662176c51a","submitter":{"id":105,"url":"https://patchwork.libcamera.org/api/people/105/?format=json","name":"Kate Hsuan","email":"hpa@redhat.com"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/26578/mbox/","series":[{"id":5889,"url":"https://patchwork.libcamera.org/api/series/5889/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=5889","date":"2026-04-22T04:47:32","name":"Implement ML-DSA-65 for Post-Quantum Cryptographic compliance","version":2,"mbox":"https://patchwork.libcamera.org/series/5889/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/26578/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/26578/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":["parsemail@patchwork.libcamera.org","kbingham@ideasonboard.com"],"Received":["from perceval.ideasonboard.com (perceval.ideasonboard.com\n\t[213.167.242.64])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id CC346BE173\n\tfor ;\n\tMon, 27 Apr 2026 09:50:56 +0000 (UTC)","from monstersaurus.ideasonboard.com\n\t(cpc89244-aztw30-2-0-cust6594.18-1.cable.virginm.net\n\t[86.31.185.195])\n\tby perceval.ideasonboard.com (Postfix) with ESMTPSA id C44448D4\n\tfor ;\n\tMon, 27 Apr 2026 11:49:14 +0200 (CEST)","from perceval.ideasonboard.com\n\tby perceval.ideasonboard.com with LMTP id CEDkGaBS6GkIFQEA4E0KoQ\n\t(envelope-from )\n\tfor ; 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charset=\"US-ASCII\"; x-default=true","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" ","X-TUID":"0Y+jAAVoIGxR","Resent-From":"Kieran Bingham ","Resent-To":"parsemail@patchwork.libcamera.org"},"content":"As quantum computing advances, traditional signature algorithms are\nbecoming vulnerable. To ensure long-term data security, this change\nimplements ML-DSA-65, the primary Post-Quantum Cryptography (PQC)\nstandard finalized by NIST. This addition prepares for the transition\naway from RSA, which is slated for deprecation by 2035.\n\nLink: https://csrc.nist.gov/projects/post-quantum-cryptography/post-quantum-cryptography-standardization/evaluation-criteria/security-(evaluation-criteria)\nLink: https://nvlpubs.nist.gov/nistpubs/ir/2024/NIST.IR.8547.ipd.pdf\nSigned-off-by: Kate Hsuan \n---\n src/libcamera/pub_key.cpp | 53 ++++++++++++++++++++++++++++++++++++---\n 1 file changed, 50 insertions(+), 3 deletions(-)","diff":"diff --git a/src/libcamera/pub_key.cpp b/src/libcamera/pub_key.cpp\nindex f1d73a5c..71c1900b 100644\n--- a/src/libcamera/pub_key.cpp\n+++ b/src/libcamera/pub_key.cpp\n@@ -14,8 +14,13 @@\n #include \n #elif HAVE_GNUTLS\n #include \n+#include \n #endif\n \n+#include \"libcamera/internal/pub_key.h\"\n+#include \n+#include \n+\n /**\n * \\file pub_key.h\n * \\brief Public key signature verification\n@@ -23,17 +28,24 @@\n \n namespace libcamera {\n \n+LOG_DEFINE_CATEGORY(PubKey);\n /**\n * \\class PubKey\n * \\brief Public key wrapper for signature verification\n *\n * The PubKey class wraps a public key and implements signature verification. It\n- * only supports RSA keys and the RSA-SHA256 signature algorithm.\n+ * supports RSA keys with the RSA-SHA256 signature algorithm, or ML-DSA-65 keys\n+ * as specified in NIST FIPS 204. The signature algorithm is determined in\n+ * compile time.\n */\n \n /**\n * \\brief Construct a PubKey from key data\n * \\param[in] key Key data encoded in DER format\n+ *\n+ * The signature algorithm is determined in the compile\n+ * Supported key types are RSA (verified with RSA-SHA256) and ML-DSA-65\n+ * (verified as ML-DSA-65 according to FIPS 204).\n */\n PubKey::PubKey([[maybe_unused]] Span key)\n \t: valid_(false)\n@@ -83,7 +95,8 @@ PubKey::~PubKey()\n * \\param[in] sig The signature\n *\n * Verify that the signature \\a sig matches the signed \\a data for the public\n- * key. The signture algorithm is hardcoded to RSA-SHA256.\n+ * key. The signature algorithm is determined in compile time. RSA keys use\n+ * RSA-SHA256, while ML-DSA keys use ML-DSA-65 mentioned in FIPS 204.\n *\n * \\return True if the signature is valid, false otherwise\n */\n@@ -94,6 +107,29 @@ bool PubKey::verify([[maybe_unused]] Span data,\n \t\treturn false;\n \n #if HAVE_CRYPTO\n+\n+#if WITH_PQC\n+\t/* ML-DSA */\n+\tEVP_MD_CTX *ctx_dsa = EVP_MD_CTX_new();\n+\tif (!ctx_dsa) {\n+\t\tLOG(PubKey, Error) << \"Initialize context for ML-DSA failed\";\n+\t\treturn false;\n+\t}\n+\n+\tif (EVP_DigestVerifyInit(ctx_dsa, nullptr, nullptr, nullptr,\n+\t\t\t\t pubkey_) <= 0) {\n+\t\tEVP_MD_CTX_free(ctx_dsa);\n+\t\tLOG(PubKey, Error) << \"Initialize ML-DSA verification failed\";\n+\t\treturn false;\n+\t}\n+\n+\tint ret = EVP_DigestVerify(ctx_dsa, sig.data(), sig.size(),\n+\t\t\t\t data.data(), data.size());\n+\tEVP_MD_CTX_free(ctx_dsa);\n+\treturn ret == 1;\n+#else\n+\t/* RSA with SHA-256 */\n+\n \t/*\n \t * Create and initialize a public key algorithm context for signature\n \t * verification.\n@@ -117,7 +153,10 @@ bool PubKey::verify([[maybe_unused]] Span data,\n \tint ret = EVP_PKEY_verify(ctx, sig.data(), sig.size(), digest,\n \t\t\t\t SHA256_DIGEST_LENGTH);\n \tEVP_PKEY_CTX_free(ctx);\n+\n \treturn ret == 1;\n+#endif\n+\n #elif HAVE_GNUTLS\n \tconst gnutls_datum_t gnuTlsData{\n \t\tconst_cast(data.data()),\n@@ -129,9 +168,17 @@ bool PubKey::verify([[maybe_unused]] Span data,\n \t\tstatic_cast(sig.size())\n \t};\n \n-\tint ret = gnutls_pubkey_verify_data2(pubkey_, GNUTLS_SIGN_RSA_SHA256, 0,\n+#if WITH_PQC\n+\tint ret = gnutls_pubkey_verify_data2(pubkey_, GNUTLS_SIGN_MLDSA65, 0,\n \t\t\t\t\t &gnuTlsData, &gnuTlsSig);\n+\n \treturn ret >= 0;\n+#else\n+\tint ret = gnutls_pubkey_verify_data2(pubkey_, GNUTLS_SIGN_RSA_SHA256,\n+\t\t\t\t\t 0, &gnuTlsData, &gnuTlsSig);\n+\n+\treturn ret >= 0;\n+#endif\n #else\n \treturn false;\n #endif\n","prefixes":["v2","1/4"]}