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commit ed55fcd2996930bf58b9bb57e9ba7b1f3a753c43
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Author: Frank Morgner <frankmorgner@gmail.com>
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Date: Mon May 18 17:25:32 2020 +0200
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fixed invalid read
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fixes https://oss-fuzz.com/testcase-detail/5765246676631552
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diff --git a/src/libopensc/pkcs15-gemsafeGPK.c b/src/libopensc/pkcs15-gemsafeGPK.c
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index e13f3b87..4b80daf2 100644
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--- a/src/libopensc/pkcs15-gemsafeGPK.c
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+++ b/src/libopensc/pkcs15-gemsafeGPK.c
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@@ -205,7 +205,7 @@ static int sc_pkcs15emu_gemsafeGPK_init(sc_pkcs15_card_t *p15card)
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u8 sysrec[7];
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int num_keyinfo = 0;
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- keyinfo kinfo[8]; /* will loook for 8 keys */
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+ keyinfo kinfo[9]; /* will look for 9 keys */
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u8 modulus_buf[ 1 + 1024 / 8]; /* tag+modulus */
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u8 *cp;
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char buf[256];
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@@ -255,9 +255,9 @@ static int sc_pkcs15emu_gemsafeGPK_init(sc_pkcs15_card_t *p15card)
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/* There may be more then one key in the directory. */
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/* we need to find them so we can associate them with the */
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- /* the certificate. The files are 0007 to 000f */
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+ /* the certificate. The files are 0007 to 000F */
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- for (i = 7; i < 16; i++) {
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+ for (i = 0x7; i <= 0xF; i++) {
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path.value[0] = 0x00;
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path.value[1] = i;
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path.len = 2;
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@@ -297,7 +297,7 @@ static int sc_pkcs15emu_gemsafeGPK_init(sc_pkcs15_card_t *p15card)
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while (j--)
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*cp++ = modulus_buf[j + 1];
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num_keyinfo++;
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- }
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+ }
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/* Get the gemsafe data with the cert */
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sc_format_path("3F000200004", &path);
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