From 24f37ccaedd990c49b09e7ff19ccc42899d2af85 Mon Sep 17 00:00:00 2001 From: Paul Bakker Date: Wed, 30 Apr 2014 13:33:35 +0200 Subject: [PATCH] rsa_check_pubkey() now allows an E up to N --- ChangeLog | 1 + library/rsa.c | 2 +- tests/suites/test_suite_rsa.data | 8 +++++++- 3 files changed, 9 insertions(+), 2 deletions(-) diff --git a/ChangeLog b/ChangeLog index 8047407b6..ade9e15e3 100644 --- a/ChangeLog +++ b/ChangeLog @@ -22,6 +22,7 @@ Bugfix ciphersuites, for full SSL frames of data. * Improve interoperability by not writing extension length in ClientHello / ServerHello when no extensions are present (found by Matthew Page) + * rsa_check_pubkey() now allows an E up to N = PolarSSL 1.3.6 released on 2014-04-11 diff --git a/library/rsa.c b/library/rsa.c index 452336858..7869d22d1 100644 --- a/library/rsa.c +++ b/library/rsa.c @@ -168,7 +168,7 @@ int rsa_check_pubkey( const rsa_context *ctx ) return( POLARSSL_ERR_RSA_KEY_CHECK_FAILED ); if( mpi_msb( &ctx->E ) < 2 || - mpi_msb( &ctx->E ) > 64 ) + mpi_cmp_mpi( &ctx->E, &ctx->N ) >= 0 ) return( POLARSSL_ERR_RSA_KEY_CHECK_FAILED ); return( 0 ); diff --git a/tests/suites/test_suite_rsa.data b/tests/suites/test_suite_rsa.data index bd4b6e9bb..5e9afe3a2 100644 --- a/tests/suites/test_suite_rsa.data +++ b/tests/suites/test_suite_rsa.data @@ -310,7 +310,13 @@ RSA Check Public key #8 (E exactly 64 bits) rsa_check_pubkey:16:"fedcba9876543210deadbeefcafe4321":16:"00fedcba9876543213":0 RSA Check Public key #8 (E larger than 64 bits) -rsa_check_pubkey:16:"fedcba9876543210deadbeefcafe4321":16:"01fedcba9876543213":POLARSSL_ERR_RSA_KEY_CHECK_FAILED +rsa_check_pubkey:16:"fedcba9876543210deadbeefcafe4321":16:"01fedcba9876543213":0 + +RSA Check Public key #9 (E has size N-2) +rsa_check_pubkey:16:"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":16:"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":0 + +RSA Check Public key #10 (E has size N) 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RSA Private (Correct) rsa_private:"59779fd2a39e56640c4fc1e67b60aeffcecd78aed7ad2bdfa464e93d04198d48466b8da7445f25bfa19db2844edd5c8f539cf772cc132b483169d390db28a43bc4ee0f038f6568ffc87447746cb72fefac2d6d90ee3143a915ac4688028805905a68eb8f8a96674b093c495eddd8704461eaa2b345efbb2ad6930acd8023f870":2048:16:"e79a373182bfaa722eb035f772ad2a9464bd842de59432c18bbab3a7dfeae318c9b915ee487861ab665a40bd6cda560152578e8579016c929df99fea05b4d64efca1d543850bc8164b40d71ed7f3fa4105df0fb9b9ad2a18ce182c8a4f4f975bea9aa0b9a1438a27a28e97ac8330ef37383414d1bd64607d6979ac050424fd17":16:"c6749cbb0db8c5a177672d4728a8b22392b2fc4d3b8361d5c0d5055a1b4e46d821f757c24eef2a51c561941b93b3ace7340074c058c9bb48e7e7414f42c41da4cccb5c2ba91deb30c586b7fb18af12a52995592ad139d3be429add6547e044becedaf31fa3b39421e24ee034fbf367d11f6b8f88ee483d163b431e1654ad3e89":16:"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":16:"3":"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":0