On Tue, Feb 28, 2017 at 11:35:04PM +0100, Stephan Müller wrote: > Am Dienstag, 28. Februar 2017, 17:45:53 CET schrieb Corentin Labbe: > > Hi Corentin, > > > On Tue, Feb 28, 2017 at 05:08:35PM +0100, Stephan Müller wrote: > > > Am Dienstag, 28. Februar 2017, 16:59:53 CET schrieb Corentin Labbe: > > > > > > Hi Corentin, > > > > > > > hello > > > > > > > > I work on the sun8i-ce crypto accelerator and I have some problem with > > > > the > > > > RSA part. > > > > > > > > The RSA register fail at the first RSA test (encrypt 512bit) with this > > > > output: [ 8480.146843] alg: akcipher: encrypt test failed. Invalid > > > > output > > > > [ 8480.146871] 00000000: 6e 7c 8a 75 e7 30 80 d1 5e ab 9b db a2 cf ed db > > > > [ 8480.146897] 00000010: c9 b2 db 43 bd 9a b9 75 27 f3 73 d9 73 b7 81 8c > > > > [ 8480.146921] 00000020: 49 e8 45 fc 43 44 f5 6d f0 f7 b8 f2 ae 6b ae 49 > > > > [ 8480.146946] 00000030: 1b 8e 50 c6 88 4e 99 09 78 14 f2 5d 99 c3 7f f9 > > > > [ 8480.146995] alg: akcipher: test 1 failed for rsa-sun8i-ce, err=-22 > > > > > > > > But with the same parameters (msg, n, e) openssl give me exactly this > > > > output. > > > > > > > > So what I miss for made it work ? > > > > In which format testmgr expect the output data ? > > > > > > The output should be simply the binary string from the modular > > > exponentiation operation. > > > > > > What I am wondering is: the output logged above is not found in the > > > expected values of testmgr.h. Which input data or test vectors do you > > > use? > > > > > > Ciao > > > Stephan > > > > I use the first test from rsa_tv_template in crypto/testmgr.h > > The test fail on the encrypt operation. > > > > I have put below the openssl program that give me the same output than my > > hardware accelerator with the same parameters. > > I would think the issue is that the OpenSSL BIGNUM lib has some issues: when > calculating m^e mod n, m has to be equal to the key size. The kernel's MPI > code handles the case where m is smaller than the key size. > > Note, in your code below, ptext is the 8 bytes from ptext_ex plus trailing > zeroes whereas the kernel uses just the 8 bytes. > > It seems that your implementation has the same issue. > > What about the following test: change vector->m to be 64 bytes (i.e. > RSA_size(key) in size in testmgr.h and check the output of crypto/rsa.c, > openssl's output with the app below and your RSA hardware. I got the following: [ 1.086228] alg: akcipher: encrypt test failed. Invalid output [ 1.092196] 00000000: 6e 7c 8a 75 e7 30 80 d1 5e ab 9b db a2 cf ed db [ 1.098882] 00000010: c9 b2 db 43 bd 9a b9 75 27 f3 73 d9 73 b7 81 8c [ 1.105524] 00000020: 49 e8 45 fc 43 44 f5 6d f0 f7 b8 f2 ae 6b ae 49 [ 1.112090] 00000030: 1b 8e 50 c6 88 4e 99 09 78 14 f2 5d 99 c3 7f f9 [ 1.118747] alg: akcipher: test 1 failed for rsa-generic, err=-22 (Exactly the output of my hardare and openssl test) So the problem is just that my hardware does not handle non-padded data. Thanks Regards Corentin Labbe
