add s3 storage for attestations

Signed-off-by: Bob Callaway <bcallaway@google.com>

go.mod

@@ -79,15 +79,23 @@ require (
 	github.com/Azure/azure-sdk-for-go/sdk/security/keyvault/internal v1.0.0 // indirect
 	github.com/AzureAD/microsoft-authentication-library-for-go v1.1.1 // indirect
 	github.com/alessio/shellescape v1.4.1 // indirect
+	github.com/aws/aws-sdk-go v1.47.10 // indirect
 	github.com/aws/aws-sdk-go-v2 v1.21.2 // indirect
+	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.4.11 // indirect
 	github.com/aws/aws-sdk-go-v2/config v1.19.1 // indirect
 	github.com/aws/aws-sdk-go-v2/credentials v1.13.43 // indirect
 	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.13.13 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.11.76 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.43 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.37 // indirect
 	github.com/aws/aws-sdk-go-v2/internal/ini v1.3.45 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/v4a v1.1.0 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.9.12 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.1.32 // indirect
 	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.9.37 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.15.0 // indirect
 	github.com/aws/aws-sdk-go-v2/service/kms v1.24.7 // indirect
+	github.com/aws/aws-sdk-go-v2/service/s3 v1.38.1 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sso v1.15.2 // indirect
 	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.17.3 // indirect
 	github.com/aws/aws-sdk-go-v2/service/sts v1.23.2 // indirect
@@ -110,6 +118,7 @@ require (
 	github.com/hashicorp/go-sockaddr v1.0.2 // indirect
 	github.com/hashicorp/vault/api v1.10.0 // indirect
 	github.com/jellydator/ttlcache/v3 v3.1.0 // indirect
+	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/klauspost/compress v1.17.0 // indirect
 	github.com/klauspost/pgzip v1.2.6 // indirect
 	github.com/kylelemons/godebug v1.1.0 // indirect

go.sum

@@ -78,22 +78,29 @@ github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 h1:DklsrG3d
 github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
 github.com/aws/aws-sdk-go v1.47.10 h1:cvufN7WkD1nlOgpRopsmxKQlFp5X1MfyAw4r7BBORQc=
 github.com/aws/aws-sdk-go v1.47.10/go.mod h1:LF8svs817+Nz+DmiMQKTO3ubZ/6IaTpq3TjupRn3Eqk=
+github.com/aws/aws-sdk-go-v2 v1.20.0/go.mod h1:uWOr0m0jDsiWw8nnXiqZ+YG6LdvAlGYDLLf2NmHZoy4=
 github.com/aws/aws-sdk-go-v2 v1.21.2 h1:+LXZ0sgo8quN9UOKXXzAWRT3FWd4NxeXWOZom9pE7GA=
 github.com/aws/aws-sdk-go-v2 v1.21.2/go.mod h1:ErQhvNuEMhJjweavOYhxVkn2RUx7kQXVATHrjKtxIpM=
 github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.4.11 h1:/MS8AzqYNAhhRNalOmxUvYs8VEbNGifTnzhPFdcRQkQ=
 github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.4.11/go.mod h1:va22++AdXht4ccO3kH2SHkHHYvZ2G9Utz+CXKmm2CaU=
+github.com/aws/aws-sdk-go-v2/config v1.18.32/go.mod h1:U3ZF0fQRRA4gnbn9GGvOWLoT2EzzZfAWeKwnVrm1rDc=
 github.com/aws/aws-sdk-go-v2/config v1.19.1 h1:oe3vqcGftyk40icfLymhhhNysAwk0NfiwkDi2GTPMXs=
 github.com/aws/aws-sdk-go-v2/config v1.19.1/go.mod h1:ZwDUgFnQgsazQTnWfeLWk5GjeqTQTL8lMkoE1UXzxdE=
+github.com/aws/aws-sdk-go-v2/credentials v1.13.31/go.mod h1:T4sESjBtY2lNxLgkIASmeP57b5j7hTQqCbqG0tWnxC4=
 github.com/aws/aws-sdk-go-v2/credentials v1.13.43 h1:LU8vo40zBlo3R7bAvBVy/ku4nxGEyZe9N8MqAeFTzF8=
 github.com/aws/aws-sdk-go-v2/credentials v1.13.43/go.mod h1:zWJBz1Yf1ZtX5NGax9ZdNjhhI4rgjfgsyk6vTY1yfVg=
+github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.13.7/go.mod h1:3we0V09SwcJBzNlnyovrR2wWJhWmVdqAsmVs4uronv8=
 github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.13.13 h1:PIktER+hwIG286DqXyvVENjgLTAwGgoeriLDD5C+YlQ=
 github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.13.13/go.mod h1:f/Ib/qYjhV2/qdsf79H3QP/eRE4AkVyEf6sk7XfZ1tg=
 github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.11.76 h1:DJ1kHj0GI9BbX+XhF0kHxlzOVjcncmDUXmCvXdbfdAE=
 github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.11.76/go.mod h1:/AZCdswMSgwpB2yMSFfY5H4pVeBLnCuPehdmO/r3xSM=
+github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.37/go.mod h1:Pdn4j43v49Kk6+82spO3Tu5gSeQXRsxo56ePPQAvFiA=
 github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.43 h1:nFBQlGtkbPzp/NjZLuFxRqmT91rLJkgvsEQs68h962Y=
 github.com/aws/aws-sdk-go-v2/internal/configsources v1.1.43/go.mod h1:auo+PiyLl0n1l8A0e8RIeR8tOzYPfZZH/JNlrJ8igTQ=
+github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.31/go.mod h1:fTJDMe8LOFYtqiFFFeHA+SVMAwqLhoq0kcInYoLa9Js=
 github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.37 h1:JRVhO25+r3ar2mKGP7E0LDl8K9/G36gjlqca5iQbaqc=
 github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.4.37/go.mod h1:Qe+2KtKml+FEsQF/DHmDV+xjtche/hwoF75EG4UlHW8=
+github.com/aws/aws-sdk-go-v2/internal/ini v1.3.38/go.mod h1:1/jLp0OgOaWIetycOmycW+vYTYgTZFPttJQRgsI1PoU=
 github.com/aws/aws-sdk-go-v2/internal/ini v1.3.45 h1:hze8YsjSh8Wl1rYa1CJpRmXP21BvOBuc76YhW0HsuQ4=
 github.com/aws/aws-sdk-go-v2/internal/ini v1.3.45/go.mod h1:lD5M20o09/LCuQ2mE62Mb/iSdSlCNuj6H5ci7tW7OsE=
 github.com/aws/aws-sdk-go-v2/internal/v4a v1.1.0 h1:U5yySdwt2HPo/pnQec04DImLzWORbeWML1fJiLkKruI=
@@ -102,6 +109,7 @@ github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.9.12 h1:uAiiHnW
 github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.9.12/go.mod h1:fUTHpOXqRQpXvEpDPSa3zxCc2fnpW6YnBoba+eQr+Bg=
 github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.1.32 h1:kvN1jPHr9UffqqG3bSgZ8tx4+1zKVHz/Ktw/BwW6hX8=
 github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.1.32/go.mod h1:QmMEM7es84EUkbYWcpnkx8i5EW2uERPfrTFeOch128Y=
+github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.9.31/go.mod h1:3+lloe3sZuBQw1aBc5MyndvodzQlyqCZ7x1QPDHaWP4=
 github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.9.37 h1:WWZA/I2K4ptBS1kg0kV1JbBtG/umed0vwHRrmcr9z7k=
 github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.9.37/go.mod h1:vBmDnwWXWxNPFRMmG2m/3MKOe+xEcMDo1tanpaWCcck=
 github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.15.0 h1:Wgjft9X4W5pMeuqgPCHIQtbZ87wsgom7S5F8obreg+c=
@@ -110,12 +118,16 @@ github.com/aws/aws-sdk-go-v2/service/kms v1.24.7 h1:uRGw0UKo5hc7M2T7uGsK/Yg2qwec
 github.com/aws/aws-sdk-go-v2/service/kms v1.24.7/go.mod h1:z3O9CXfVrKAV3c9fMWOUUv2C6N2ggXCDHeXpOB6lAEk=
 github.com/aws/aws-sdk-go-v2/service/s3 v1.38.1 h1:mTgFVlfQT8gikc5+/HwD8UL9jnUro5MGv8n/VEYF12I=
 github.com/aws/aws-sdk-go-v2/service/s3 v1.38.1/go.mod h1:6SOWLiobcZZshbmECRTADIRYliPL0etqFSigauQEeT0=
+github.com/aws/aws-sdk-go-v2/service/sso v1.13.1/go.mod h1:TC9BubuFMVScIU+TLKamO6VZiYTkYoEHqlSQwAe2omw=
 github.com/aws/aws-sdk-go-v2/service/sso v1.15.2 h1:JuPGc7IkOP4AaqcZSIcyqLpFSqBWK32rM9+a1g6u73k=
 github.com/aws/aws-sdk-go-v2/service/sso v1.15.2/go.mod h1:gsL4keucRCgW+xA85ALBpRFfdSLH4kHOVSnLMSuBECo=
+github.com/aws/aws-sdk-go-v2/service/ssooidc v1.15.1/go.mod h1:XO/VcyoQ8nKyKfFW/3DMsRQXsfh/052tHTWmg3xBXRg=
 github.com/aws/aws-sdk-go-v2/service/ssooidc v1.17.3 h1:HFiiRkf1SdaAmV3/BHOFZ9DjFynPHj8G/UIO1lQS+fk=
 github.com/aws/aws-sdk-go-v2/service/ssooidc v1.17.3/go.mod h1:a7bHA82fyUXOm+ZSWKU6PIoBxrjSprdLoM8xPYvzYVg=
+github.com/aws/aws-sdk-go-v2/service/sts v1.21.1/go.mod h1:G8SbvL0rFk4WOJroU8tKBczhsbhj2p/YY7qeJezJ3CI=
 github.com/aws/aws-sdk-go-v2/service/sts v1.23.2 h1:0BkLfgeDjfZnZ+MhB3ONb01u9pwFYTCZVhlsSSBvlbU=
 github.com/aws/aws-sdk-go-v2/service/sts v1.23.2/go.mod h1:Eows6e1uQEsc4ZaHANmsPRzAKcVDrcmjjWiih2+HUUQ=
+github.com/aws/smithy-go v1.14.0/go.mod h1:Tg+OJXh4MB2R/uN61Ko2f6hTZwB/ZYGOtib8J3gBHzA=
 github.com/aws/smithy-go v1.15.0 h1:PS/durmlzvAFpQHDs4wi4sNNP9ExsqZh6IlfdHXgKK8=
 github.com/aws/smithy-go v1.15.0/go.mod h1:Tg+OJXh4MB2R/uN61Ko2f6hTZwB/ZYGOtib8J3gBHzA=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
@@ -384,6 +396,7 @@ github.com/jellydator/ttlcache/v3 v3.1.0 h1:0gPFG0IHHP6xyUyXq+JaD8fwkDCqgqwohXNJ
 github.com/jellydator/ttlcache/v3 v3.1.0/go.mod h1:hi7MGFdMAwZna5n2tuvh63DvFLzVKySzCVW6+0gA2n4=
 github.com/jmespath/go-jmespath v0.4.0 h1:BEgLn5cpjn8UN1mAw4NjwDrS35OdebyEtFe+9YPoQUg=
 github.com/jmespath/go-jmespath v0.4.0/go.mod h1:T8mJZnbsbmF+m6zOOFylbeCJqk5+pHWvzYPziyZiYoo=
+github.com/jmespath/go-jmespath/internal/testify v1.5.1 h1:shLQSRRSCCPj3f2gpwzGwWFoC7ycTf1rcQZHOlsJ6N8=
 github.com/jmespath/go-jmespath/internal/testify v1.5.1/go.mod h1:L3OGu8Wl2/fWfCI6z80xFu9LTZmf1ZRjMHUOPmWr69U=
 github.com/jmhodges/clock v0.0.0-20160418191101-880ee4c33548 h1:dYTbLf4m0a5u0KLmPfB6mgxbcV7588bOCx79hxa5Sr4=
 github.com/jmhodges/clock v0.0.0-20160418191101-880ee4c33548/go.mod h1:hGT6jSUVzF6no3QaDSMLGLEHtHSBSefs+MgcDWnmhmo=

pkg/storage/storage.go

@@ -29,6 +29,7 @@ import (
 	_ "gocloud.dev/blob/fileblob"
 	_ "gocloud.dev/blob/gcsblob"
 	_ "gocloud.dev/blob/memblob"
+	_ "gocloud.dev/blob/s3blob"
 )
 
 type AttestationStorage interface {