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0013-appended-signature-Support-two-certificate...
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File 0013-appended-signature-Support-two-certificates.patch of Package qemu
From 63eb79772de45f7e3a07039eb248b8c8384a6b85 Mon Sep 17 00:00:00 2001 From: Michal Suchanek <msuchanek@suse.de> Date: Wed, 5 Jan 2022 17:10:06 +0100 Subject: [PATCH] appended signature: Support two certificates. Signed-off-by: Michal Suchanek <msuchanek@suse.de> --- lib/libcrypto/appended_sig.c | 72 +++++++++++++--------- lib/libcrypto/certificate.h | 112 +++++++++++++++++++++++++++++++++++ 2 files changed, 156 insertions(+), 28 deletions(-) diff --git a/roms/SLOF/lib/libcrypto/appended_sig.c b/roms/SLOF/lib/libcrypto/appended_sig.c index 6b7c0cd..f3d6de5 100644 --- a/roms/SLOF/lib/libcrypto/appended_sig.c +++ b/roms/SLOF/lib/libcrypto/appended_sig.c @@ -32,10 +32,43 @@ int is_secureboot() { return 1; } +static int verify_one_cert(mbedtls_pkcs7 *pkcs7, const void *blob, size_t bloblen, const void *cert, size_t certlen, const char *certdesc) +{ + mbedtls_x509_crt *x509 = malloc(sizeof(mbedtls_x509_crt)); + int rc = 0; + + mbedtls_x509_crt_init(x509); + printf("%d\n", __LINE__); + rc = mbedtls_x509_crt_parse_der(x509, cert, certlen); + if (rc) { + printf("%d\n", __LINE__); + + printf("Appended signature: internal error parsing %s x509 certificate.\n", certdesc); + rc = 0; + goto exit_x509; + } + printf("%d\n", __LINE__); + + rc = mbedtls_pkcs7_signed_data_verify(pkcs7, x509, blob, bloblen); + printf("Appended signature: %sverified by %s x509 certificate.\n", rc ? "NOT " : "" , certdesc); + if (rc) { + printf("%d\n", __LINE__); + rc = 0; + goto exit_x509; + } + + rc = 1; + +exit_x509: + mbedtls_x509_crt_free(x509); + free(x509); + + return rc; +} + int verify_appended_signature(void *blob, size_t len) { void *ptr; mbedtls_pkcs7 *pkcs7; - mbedtls_x509_crt *x509; int rc = 0; struct module_signature *modsig; @@ -69,48 +102,31 @@ int verify_appended_signature(void *blob, size_t len) { // point at the pkcs7 data itself: ptr -= modsig->sig_len; + printf("%d\n", __LINE__); + printf("ptr at %p, blob at %p, computed len %lu ? %lu\n", ptr, blob, len-(ptr-blob), (unsigned long)(ptr-blob)); + // load into the pkcs7 code pkcs7 = malloc(sizeof(mbedtls_pkcs7)); mbedtls_pkcs7_init(pkcs7); - rc = mbedtls_pkcs7_parse_der(ptr, modsig->sig_len, pkcs7); if (rc != MBEDTLS_PKCS7_SIGNED_DATA) { printf("Appended signature: error parsing PKCS#7 data: %d. Aborting.\n", rc); rc = 0; goto exit; } - - x509 = malloc(sizeof(mbedtls_x509_crt)); - mbedtls_x509_crt_init(x509); - printf("%d\n", __LINE__); - rc = mbedtls_x509_crt_parse_der(x509, certificate_der, certificate_der_len); - if (rc) { printf("%d\n", __LINE__); - printf("Appended signature: internal error parsing builtin x509 certificate. Aborting.\n"); - rc = 0; - goto exit_x509; - } - printf("%d\n", __LINE__); + rc = verify_one_cert(pkcs7, blob, (ptr-blob), certificate_SLE_crt, certificate_SLE_crt_len, "SLE"); + if (rc) + goto exit; - printf("ptr at %p, blob at %p, computed len %lu ? %lu\n", ptr, blob, len-(ptr-blob), (unsigned long)(ptr-blob)); + rc = verify_one_cert(pkcs7, blob, (ptr-blob), certificate_der, certificate_der_len, "project"); + if (rc) + goto exit; - rc = mbedtls_pkcs7_signed_data_verify(pkcs7, x509, blob, (ptr - blob)); - if (rc) { - printf("%d\n", __LINE__); - printf("Appended signature: verification failed. Refusing to proceed.\n"); - rc = 0; - goto exit_x509; - } printf("%d\n", __LINE__); - - rc = 1; - -exit_x509: - mbedtls_x509_crt_free(x509); - free(x509); - + printf("Appended signature: verification failed. Refusing to proceed.\n"); exit: mbedtls_pkcs7_free(pkcs7); free(pkcs7); diff --git a/roms/SLOF/lib/libcrypto/certificate.h b/roms/SLOF/lib/libcrypto/certificate.h index b48f1ee..88d2e4b 100644 --- a/roms/SLOF/lib/libcrypto/certificate.h +++ b/roms/SLOF/lib/libcrypto/certificate.h @@ -116,3 +116,115 @@ unsigned char certificate_der[] = { 0x61 }; unsigned int certificate_der_len = 1369; + +unsigned char certificate_SLE_crt[] = { + 0x30, 0x82, 0x05, 0x04, 0x30, 0x82, 0x03, 0xec, 0xa0, 0x03, 0x02, 0x01, + 0x02, 0x02, 0x09, 0x00, 0xed, 0x87, 0x85, 0xb7, 0x8f, 0xfc, 0x12, 0x7e, + 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, + 0x0b, 0x05, 0x00, 0x30, 0x81, 0xa6, 0x31, 0x2d, 0x30, 0x2b, 0x06, 0x03, + 0x55, 0x04, 0x03, 0x0c, 0x24, 0x53, 0x55, 0x53, 0x45, 0x20, 0x4c, 0x69, + 0x6e, 0x75, 0x78, 0x20, 0x45, 0x6e, 0x74, 0x65, 0x72, 0x70, 0x72, 0x69, + 0x73, 0x65, 0x20, 0x53, 0x65, 0x63, 0x75, 0x72, 0x65, 0x20, 0x42, 0x6f, + 0x6f, 0x74, 0x20, 0x43, 0x41, 0x31, 0x0b, 0x30, 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0xbf, 0x20, 0x88, 0xea, 0x2a, 0x56, 0xb5, 0x37, 0xdb, 0x07, + 0xdb, 0xa6, 0xee, 0x17, 0x07, 0x09, 0x20, 0x75, 0xd0, 0x44, 0x1e, 0x21, + 0xd5, 0xba, 0x15, 0xb4, 0x8a, 0xa2, 0x41, 0x93, 0x9e, 0xe0, 0x18, 0xc6, + 0x45, 0x3b, 0xd1, 0x20, 0xb1, 0x8e, 0x6b, 0xf5, 0x97, 0x9f, 0xc5, 0x21, + 0x42, 0xf3, 0x1c, 0xdf, 0xd6, 0xc2, 0xaf, 0x54, 0xb1, 0x31, 0x1b, 0xe9, + 0x09, 0x5e, 0xf3, 0x2b +}; +unsigned int certificate_SLE_crt_len = 1288; -- 2.34.1
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