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- Increase buffer size, fixes converting 521bit ECC key

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- Fix assertion that key size is exactly curve size
This commit is contained in:
Matt Johnston 2013-11-27 21:30:05 +08:00
parent e5c52796c3
commit 0b62d71e70
1 changed files with 7 additions and 5 deletions
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12
keyimport.c
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@ -1033,6 +1033,7 @@ static int openssh_write(const char *filename, sign_key *key,
int curve_oid_len = 0;
const void* curve_oid = NULL;
unsigned long pubkey_size = 2*curve_size+1;
unsigned int k_size;
/* version. less than 10 bytes */
buf_incrwritepos(seq_buf,
@ -1040,11 +1041,12 @@ static int openssh_write(const char *filename, sign_key *key,
buf_putbyte(seq_buf, 1);
/* privateKey */
dropbear_assert(mp_unsigned_bin_size((*eck)->k) == curve_size);
k_size = mp_unsigned_bin_size((*eck)->k);
dropbear_assert(k_size <= curve_size);
buf_incrwritepos(seq_buf,
ber_write_id_len(buf_getwriteptr(seq_buf, 10), 4, curve_size, 0));
mp_to_unsigned_bin((*eck)->k, buf_getwriteptr(seq_buf, curve_size));
buf_incrwritepos(seq_buf, curve_size);
ber_write_id_len(buf_getwriteptr(seq_buf, 10), 4, k_size, 0));
mp_to_unsigned_bin((*eck)->k, buf_getwriteptr(seq_buf, k_size));
buf_incrwritepos(seq_buf, k_size);
/* SECGCurveNames */
switch (key->type)
@ -1085,7 +1087,7 @@ static int openssh_write(const char *filename, sign_key *key,
buf_setpos(seq_buf, 0);
outblob = (unsigned char*)m_malloc(200);
outblob = (unsigned char*)m_malloc(1000);
pos = 0;
pos += ber_write_id_len(outblob+pos, 16, seq_buf->len, ASN1_CONSTRUCTED);