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s390/zcrypt: enable odd RSA modulus sizes in CRT format
In the past only even modulus sizes were allowed for RSA keys in CRT format. This restriction was based on limited RSA key generation on older crypto adapters that provides only even modulus sizes. This restriction is not valid any more. Revoke restrictions that crypto requests can be serviced with odd RSA modulus length in CRT format. Signed-off-by: Ingo Tuchscherer <ingo.tuchscherer@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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parent
b02064a9b8
commit
1330a1258d
4 changed files with 4 additions and 5 deletions
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@ -472,8 +472,7 @@ static long zcrypt_rsa_crt(struct ica_rsa_modexpo_crt *crt)
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unsigned long long z1, z2, z3;
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int rc, copied;
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if (crt->outputdatalength < crt->inputdatalength ||
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(crt->inputdatalength & 1))
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if (crt->outputdatalength < crt->inputdatalength)
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return -EINVAL;
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/*
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* As long as outputdatalength is big enough, we can set the
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@ -291,7 +291,7 @@ static inline int zcrypt_type6_crt_key(struct ica_rsa_modexpo_crt *crt,
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memset(key, 0, sizeof(*key));
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short_len = crt->inputdatalength / 2;
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short_len = (crt->inputdatalength + 1) / 2;
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long_len = short_len + 8;
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pad_len = -(3*long_len + 2*short_len) & 7;
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key_len = 3*long_len + 2*short_len + pad_len + crt->inputdatalength;
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@ -248,7 +248,7 @@ static int ICACRT_msg_to_type50CRT_msg(struct zcrypt_device *zdev,
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unsigned char *p, *q, *dp, *dq, *u, *inp;
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mod_len = crt->inputdatalength;
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short_len = mod_len / 2;
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short_len = (mod_len + 1) / 2;
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/*
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* CEX2A and CEX3A w/o FW update can handle requests up to
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@ -138,7 +138,7 @@ static int ICACRT_msg_to_type4CRT_msg(struct zcrypt_device *zdev,
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int mod_len, short_len, long_len;
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mod_len = crt->inputdatalength;
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short_len = mod_len / 2;
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short_len = (mod_len + 1) / 2;
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long_len = mod_len / 2 + 8;
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if (mod_len <= 128) {
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